JP2009035723A - Method of manufacturing heating body, and the heating body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heating bodies of various sizes and various shapes, showing good start-up of heating and favorably converted into a heating composition excellent in start-up of heating. <P>SOLUTION: A manufacturing method of the heating body comprises the steps of: enclosing a heating precursor having a heating part containing an excess water-containing heating composition having an excess water value of 0.5-80 in an outer bag made of a packing material with a water-vapor permeability of 0.1-6.0 g/(m<SP>2</SP>×day); keeping the heating precursor in at least one environment chosen from a non-damaging natural environment and a controlled environment kept at a temperature of 1-80°C for a period ranging from 25 hours to 2 years; and converting the heating precursor into the heating body having a water-containing heating composition showing an excess water value of 0 and a start-up temperature increase rate of ≥12°C/5 min. Here, the heating precursor essentially comprises an iron powder, a carbon component, a reaction accelerator and water. The heating body is also provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention provides a heating element containing a heating composition molded body obtained by molding a surplus water heating composition from a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day). By enclosing in a bag and holding for a certain period of time, excess water used as a binder for molding the exothermic composition is removed, it has various sizes and shapes, the excess water value is 0, and the rising temperature rise rate The present invention relates to a method for producing a heating element having a hydrous heating composition having a temperature of 12 ° C./5 minutes or more, and a heating element.

  Disposable warmers are generally well known as products used by causing air (oxygen) to act on a mixture of iron powder and reaction aids.

  It is known that iron powder is the most common metal powder used in these products, and salt, water, etc. are used as reaction aids, and activated carbon is used as a water retention agent to hold these substances. It is also well known that vermiculite, diatomaceous earth, wood flour, or a water-absorbing polymer are used in admixture. In addition, if the amount of water, which is one of the essential components, is small, the heat generation time of the warmer is short, and if it is too much, the warmer does not generate heat, so the composition of the heat generating composition has been devised so that excess water does not exist in the warmer. It was.

  In the case of a disposable body warmer, it is desired to raise the temperature immediately after opening (for example, Patent Documents 1 and 2).

  Patent Document 1 proposes an exothermic composition in which manganese dioxide, cupric oxide, and iron tetroxide are mixed with other exothermic composition components. These are used as catalysts and cannot be used as exothermic substances. Also, when they are added to the exothermic composition, the contact between the iron tetroxide and the iron powder surface is not sufficient, and there is no effect as described, and usually the heating element is used for heating the human body or object. In the region of about 30 to about 90 ° C., which is used as an application, there is a problem that the heat generation duration is shortened as the addition ratio increases.

  Patent Document 2 proposes a heating element in which an exothermic composition mainly composed of an oxidation accelerator such as iron, water, and salt is stored in a breathable container after reaching 40 ° C. It took 25 minutes to reach the temperature, and industrial mass production was difficult.

 In addition, in order to obtain a more comfortable feeling of use, the exothermic composition that seeks to prevent misalignment of the exothermic composition and fit by various shapes, uses a thickener, a binder, etc., and maintains the moldability. Various proposals have been made. For example, Patent Document 3 proposes a disposable body warmer made of a heat generating composition in which a powdery thickening agent such as corn starch and potato chopstick starch is added to maintain shape maintenance. Patent Document 4 proposes a solid exothermic composition in which a powdery exothermic composition is mixed with a binder such as CMC and compression molded. Further, Patent Document 5 proposes an ink-like or cream-like exothermic composition and exothermic body using a thickener and imparting viscosity, and a method for producing the same. Patent Document 6 proposes a heating element using surplus water.

 These ink-like or cream-like viscous exothermic compositions and cohesive cohesive exothermic compositions contain thickeners such as glue, gum arabic and CMC, coagulation aids such as pregelatinized starch, excipients and binders. Since the exothermic composition particles were bonded by these viscous materials, the used ones were excellent in prevention of misalignment and moldability, but remarkably poor in heat generation performance. Similarly, viscous exothermic compositions made using thickeners and binders are also bonded to exothermic composition particles using thickeners and binders. However, the heat generation performance was extremely bad. That is, even if free water is absorbed by a support, a coating material, or a water absorbing material, the exothermic composition is viscous due to a binder, a thickener, an agglomeration aid, or an excipient. The reaction slowed down due to the inability of water to escape and adverse effects on exothermic substances such as thickeners, making it difficult to raise the temperature to the desired temperature and to warm for a long time.

 Also, conventionally used powders or granular exothermic compositions are not formable because there is no or insufficient surplus water. Although these powdery or granular exothermic compositions have good exothermic characteristics, the exothermic temperature distribution may not be constant due to the deviation of the exothermic composition, etc. However, it was difficult to produce a heating element having a shape included in the shape of the object to be heated, or the heat generation performance could not be sufficiently exhibited.

  Further, the heating element having a heating composition molded body obtained by molding a heating composition having surplus water causes heat generation unevenness between lots due to the surplus water present, and has a problem in mass production.

Japanese Patent Laid-Open No. 53-60885 JP-A-57-10673 No. 6-343658 JP 59-189183 A JP-A-9-75388 JP 2004-208978 A

  The object of the present invention is to remove the excess water used for molding from the heating element after manufacturing the heating element, to improve the rising temperature rising rate of the heating composition in the heating element, that is, immediately after taking out from the outer bag. It is an object of the present invention to provide a method for producing a heating element of various shapes and sizes and a heating element that is warm and has good adhesion to a heated body such as the body.

As a result of intensive studies to solve these problems, the present inventor has reached the present invention.
That is, the manufacturing method of the heating element of the present invention is as described in claim 1.
An exothermic precursor having an exothermic part containing an excess water exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components and having an excess water value of 0.5 to 80, has a moisture permeability of 0. After being enclosed in an outer bag composed of a packaging material of 1 to 6.0 g / (m ² · day), it is selected from a natural environment that is not damaged and a controlled environment that has a holding temperature of 1 to 80 ° C. A hydrous exothermic composition having a surplus water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more by maintaining in a kind of environment and maintaining the holding period from 25 hours to 2 years. It converts into the heat generating body which has.
Moreover, the manufacturing method of the heating element according to claim 2 is the manufacturing method of the heating element according to claim 1,
An exothermic precursor having a heat generating part containing the iron powder, carbon component, reaction accelerator and water as essential components and containing a surplus water exothermic composition having an excess water value of 0.5 to 80 has a moisture permeability of 0. .1 to 6.0 g / (m ² · day) and natural without being damaged after being enclosed in an outer bag composed of a packaging material having an oxygen permeability of 0.05 to 10 ml / (m ² · day) By maintaining in a kind of environment selected from the environment and a controlled environment having a holding temperature of 1 to 80 ° C., and setting the holding period to 25 hours to 2 years, the surplus water value is 0, and The heating element is converted into a heating element having a hydrous exothermic composition having a rising temperature rising rate of 12 ° C./5 minutes or more.
Moreover, the manufacturing method of the heating element according to claim 3 is the manufacturing method of the heating element according to claim 1,
An exothermic part containing an exothermic composition molded body in which the iron powder, carbon component, reaction accelerator, and water are essential components, and an excess water exothermic composition having an excess water value of 0.5 to 80 is molded by molding. The encapsulated exothermic precursor is sealed in an outer bag composed of a packaging material having a water vapor transmission rate of 0.1 to 6.0 g / (m ² · day), and then is maintained in a natural environment that is not damaged and at a holding temperature. Is maintained in a kind of environment selected from 1 to 80 ° C. and a controlled humidity of 1 to 90%, and the retention period is 25 hours to 2 years, so that the surplus water value is 0, and The heating element is converted to a heating element having a hydrous exothermic composition having a rising temperature rising rate of 40 ° C./5 minutes or more.
Moreover, the manufacturing method of the heating element according to claim 4 is the manufacturing method of the heating element according to claim 1,
An exothermic part containing an exothermic composition molded body in which the iron powder, carbon component, reaction accelerator, and water are essential components, and an excess water exothermic composition having an excess water value of 0.5 to 80 is molded by molding. The exothermic precursor provided is composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day). After being enclosed in the outer bag, the holding period is maintained in a kind of environment selected from a natural environment not damaged and a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%. , 25 hours to 2 years, it is characterized by being converted into a heating element having a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or more.
The heating element of the present invention is as described in claim 5,
It is manufactured by the method for manufacturing a heating element according to claim 1 or 2, and is enclosed in an outer bag made of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), and iron powder And a water-containing exothermic composition having an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more.
The heating element according to claim 6 is the heating element according to claim 5,
It is manufactured by the method for manufacturing a heating element according to claim 1, wherein iron powder, a carbon component, a reaction accelerator and water are essential components, the surplus water value is 0, and the rising temperature rising rate is 12 ° C. / Heat-containing exothermic composition of 5 minutes or more, and a plurality of sectioned heat-generating part regions and sectioned parts are integrated, and at least a part is provided with a breathable container, and the sectioned heat-generating part in which the water-containing heat-generating composition is stored The divided heat generating portion that is a region and the divided portion that is a non-contained region of the heat generating composition are integrated, and a plurality of divided heat generating portions are provided at intervals, with at least a part having air permeability. And at least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less, and has flexibility based on a structural flexible function and an articulated flexible function. And
The heating element according to claim 7 is the heating element according to claim 6,
At least one loop stiffness in the longitudinal direction across the section heating section region and the section of the container is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width. As described above, the elongation at break at 25 ° C. is 5% or more, and has flexibility based on the structural flexible function and the joint flexible function.
The heating element according to claim 8 is the heating element according to any one of claims 6 to 7,
At least one loop stiffness in the longitudinal direction crossing the section heat generating portion region and the section of the storage body is 700 mN / cm or less, and at least one loop stiffness of the section is 700 mN / cm or less. And
A heating element according to claim 9 is the heating element according to any one of claims 6 to 8,
The intermittent heating is provided in at least one section of the heating element having at least one loop stiffness of 700 mN / cm or less in the longitudinal direction across the section heating section region and the section of the storage body. To do.
The heating element according to claim 10 is the heating element according to any one of claims 6 to 9,
At least a part of each section heat generating portion of the heat generating body having at least one loop stiffness in the longitudinal direction crossing the section heat generating section region and the section of the storage body is 700 mN / cm or less is covered with a local ventilation material, and the section heat generating section And a space portion surrounded by a local ventilation material, and the heat generation composition is ventilated from at least a side surface ventilation portion facing the space portion of the segment heat generation portion.
The heating element according to claim 11 is the heating element according to any one of claims 6 to 10,
At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less, the minimum bending resistance of the heating body is 70 mm or less, and the minimum bending resistance change is -95 to 0.
A heating element according to claim 12 is the heating element according to any one of claims 6 to 11,
It is characterized in that at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region of the storage body constituting the heat generating member after the end of heat generation and the divided portion serving as the seal region is 700 mN / cm or less.
The heating element according to claim 13 is the heating element according to claim 5,
The heating element is at least one selected from a single heating part heating element, a rectangular heating element, a warm heating element, and a foot heating element, and each heating element is at least partially breathable, and the heating element The hydrous exothermic composition has iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value is 0, and a rising temperature rising rate is 12 ° C./5 minutes or more.
The heating element according to claim 14 is the heating element according to claim 13,
The foot temperature heating element does not have intermittent cuts, has a full foot shape, and has a minimum bending resistance of 200 mm or more.
The heating element according to claim 15 is the heating element according to claim 6,
The heating element is a segment heating part heating element, a rigid soft heating element, a stripe heating element, a detachable heating element, an expansion heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, a detachable tunnel ventilation heating element, a separation It is at least one selected from a universal medicine heating element, eye temperature heating element, face temperature heating element (nasal temperature heating element), outer temporary folding heating element with outer bag, water-containing heating composition and a plurality of divided heating element regions And at least a part of the container is provided with an air-permeable storage body, and a classification heat generation part which is a classification heat generation part area in which the water-containing heat generation composition is stored and a classification non-storage area of the heat generation composition. Parts are integrated, and a plurality of divided heat generating parts are provided at intervals with the divided parts as an interval, and at least a part of each has a water-containing heat generating composition of a heat-generating element having air permeability, such as iron powder, carbon component, reaction accelerator Water required And the excess water value is 0, the rising temperature rise rate is 12 ° C./5 minutes or more, and at least one loop in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body of each heat generating element The stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, and the minimum heating element It is characterized by having a flexibility based on a structural flexibility function and an articulation flexibility function, wherein the bending resistance is 70 mm or less and the minimum bending resistance change is −95 to 0.
The heating element of the present invention is as described in claim 16.
It is manufactured by the method for manufacturing a heating element according to claim 3 or 4, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, a surplus water value of 0, and a rising temperature rising rate of 40 ° C / 5. It has the hydrous exothermic composition which is more than min.
The heating element according to claim 17 is the heating element according to claim 16,
A water-containing heat generating composition and a plurality of divided heat generating portion regions having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more And at least a part of the container is provided with an air-permeable storage body, and a classification heat generation part which is a classification heat generation part area in which the water-containing heat generation composition is stored and a classification non-storage area of the heat generation composition. The section is integrated, and a plurality of section heat generating sections are provided at intervals with the section section as an interval, and at least a part is air permeable, and the longitudinal direction crossing the section heat generating section region and the section section of the container A structural flexibility function and an articulation flexibility function, wherein at least one loop stiffness is 700 mN / cm or less, a heating element has a minimum bending resistance of 70 mm or less, and a minimum bending resistance change is −95 to 0; Has flexibility based on And wherein the door.
The heating element according to claim 18 is the heating element according to any one of claims 5 to 17,
A heating element having a hydrous exothermic composition having the iron powder, carbon component, reaction accelerator, and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more, It is enclosed in the outer bag comprised from the packaging material whose humidity is 0.1-6.0 g / (m < ² > * day).

1. The method for producing a heating element of the present invention can provide a heating element having various sizes and various shapes, having no heat generation failure due to excess water, and having excellent heat generation performance with a large rising temperature rising rate.
2. In the method for producing a heating element of the present invention, particularly in a natural environment, the conversion conditions are low temperature and gentle, so that damage to the heating composition can be prevented.
3. The heating element of the present invention immediately rises after being taken out from the outer bag, has a good heat build-up, fits well to a heated body such as the body, is excellent in usability, is flexible, has many shapes, A heating element of a size can be provided.
4). The segment heating part heating element defined by the loop stiffness of the present invention, when the segment heating part heating element is placed along a heated body such as a body, regardless of the weight of the heating composition of the heating element, It is possible to provide a heating element that has a non-repulsive property that can be easily along the body to be heated and does not return to its original state due to the repulsive force even after the alignment.
5). The heating element of the present invention, in particular the stripe heating element, is easy to bend in one direction and is difficult to bend in the other direction, i.e., the direction having the minimum bending resistance is easy to bend, and the minimum bending resistance is the minimum bending resistance. It is difficult to bend in the direction that makes a right angle to it, has the maximum bending resistance, and has a structure that is extremely easy to bend only in one direction compared to the other directions, so it is easy to handle, before heating, during heating, and after the end of heating, Since the change in the minimum bending resistance is -95 to 0 and the flexibility can be maintained at all times, a sufficient thermal effect can be obtained while keeping fit to the body.

The present invention relates to a method for producing a heating element that converts a heating element having an excess water exothermic composition into a heating element having an exothermic characteristic having a hydrous heating composition, and a heating element that has an excellent heating characteristic. is there.
Among them, the divided heating part heating element of the present invention is composed of a divided heating part and a dividing part, and a storage body defined by loop stiffness is incorporated in the constituent members, and is a hydrous heating composition with a surplus water value of 0. Pre-heating, during heating, and after heating is finished, the flexibility does not change, the conformity to the warmed body is good, the resilience is good, the feeling of wearing and the touch is good, and it has practical flexibility Is the body.
That is, the segmented heating element heating element of the present invention can be easily applied when the segmented heating element heating element is placed along a body or other heated body, regardless of the weight of the heating composition of the heating element. It can follow along the warm body, has good conformity to the body to be heated, has no resilience that does not return to its original state after repelling, and peeling from the pasting part occurs It is a heat generating body having various sizes and various shapes, having practical flexibility, having a good feeling of wearing and a good touch, being difficult to lose adhesiveness.
Conventionally, the minimum bending resistance, which has been used, is not sufficient as an index of flexibility because it is not possible to define repulsion due to bending even if it can define flexibility.
In the present invention, the storage body defined by the loop stiffness is used as the storage body that is an important component of the heat generation body, and the heat generation body having flexibility in consideration of both flexibility and resilience is realized.
The environment for conversion in the method for producing a heating element of the present invention is a natural environment that is not damaged, a controlled environment where the holding temperature is 1 to 80 ° C., and a holding temperature of 1 to 80 ° C. and a holding humidity of 90%. It is a kind selected from the following control environment.
That is,
The manufacturing method of the heating element of the present invention is as follows:
1) An exothermic precursor having an exothermic part containing a surplus water exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components and having an excess water value of 0.5 to 80, After being sealed in an outer bag composed of a packaging material of 0.1 to 6.0 g / (m ² · day), in a natural environment that is not damaged and in a controlled environment where the holding temperature is 1 to 80 ° C. A hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more by maintaining in a selected kind of environment and maintaining the holding period from 25 hours to 2 years A heating element manufacturing method for converting into a heating element having an object,
2) An exothermic precursor comprising a heating part containing the iron powder, a carbon component, a reaction accelerator and water as essential components and containing a surplus water exothermic composition having an excess water value of 0.5 to 80, Is 0.1 to 6.0 g / (m ² · day) and the oxygen permeability is 0.05 to 10 ml / (m ² · day). By maintaining in a natural environment that is not affected and in a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C., and setting the holding period to 25 hours to 2 years, the surplus water value is 0, and a method for producing a heating element that converts to a heating element having a hydrous heating composition having a rising temperature rising rate of 12 ° C./5 minutes or more,
3) Heat generation comprising a heat generating composition molded body obtained by molding the above-described iron powder, carbon component, reaction accelerator, and water as essential components and forming a surplus water exothermic composition having a surplus water value of 0.5 to 80 by molding. An exothermic precursor having a portion after being encapsulated in an outer bag made of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), and in a natural environment that is not damaged; and By holding in a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%, and setting the holding period to 25 hours to 2 years, the excess water value is 0. And a heating element manufacturing method for converting into a heating element having a hydrous heating composition having a rising temperature rising rate of 40 ° C./5 minutes or more,
4) Heat generation comprising a heat generating composition molded body obtained by molding the above-described iron powder, carbon component, reaction accelerator and water as essential components, and forming a surplus water exothermic composition having a surplus water value of 0.5 to 80 by molding. An exothermic precursor having a portion from a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day) Holding in a natural environment that is not damaged after being enclosed in a structured outer bag, and in a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%. A method for producing a heating element, which is converted to a heating element having a hydrous heating composition having an excess water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or longer by setting the period to 25 hours to 2 years It is.
The exothermic part containing a heat generating composition molded body in which iron powder, a carbon component, a reaction accelerator, water is an essential component, and an excess water exothermic composition having an excess water value of 0.5 to 80 is molded by molding. The exothermic precursor comprising: a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day). After being enclosed in the outer bag, it is kept in a natural environment that is not damaged, and in a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%, and the holding period is The rising temperature rising rate of the surplus water exothermic composition having an excess water value of 0.5 to 80 and the rising temperature rising rate of the hydrous exothermic composition having a surplus water value of 0 by setting to 25 hours to 2 years A method for producing a heating element in which the difference is 8 ° C./5 minutes or more is also preferable.
In particular, the removal of surplus water during natural preservation under natural conditions removes surplus water slowly, minimizing the influence on the heating element and improving the heat generation performance such as the rising temperature rise rate of the exothermic composition. Can be made.
The exothermic precursor of the present invention has a moldable surplus water exothermic composition containing free surplus water that is not constrained by a water-absorbing polymer or a water retention agent and / or a exothermic composition molded body obtained by molding it.
If the method of the present invention is used, the free excess water without binding is lower than the bound water bound by the water-absorbing polymer or the water retention agent, so the dissipation energy is low and the dissipation rate is large. It is possible to dissipate the surplus water that has become, and to selectively leave the bound water bound to the water-absorbing polymer or water retention agent necessary for heat generation in the heat-generating composition.
The heating element of the present invention is
A hydrous exothermic composition produced by the method for producing a heating element, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more. A heating element having an object,
Water content produced by the method for producing a heating element, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more The exothermic composition and the plurality of divided heat generating regions and the divided portions are integrated, and at least a part thereof includes a breathable storage body, and the divided heat generating portion which is a divided heat generating region in which the hydrous heat generating composition is stored; A section that is a non-storage area of the exothermic composition is integrated, a plurality of section heat generation sections are provided at intervals with the section being an interval, and at least a portion is air permeable, and the storage section is divided A heating element having flexibility based on a structural flexible function and an articulating flexible function, wherein at least one loop stiffness in a longitudinal direction crossing the heating part region and the section is 700 mN / cm or less;
At least one loop stiffness in the longitudinal direction across the section heating section and section of the container is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of at least one section is 20 g / mm width or more. The elongation at break at 25 ° C. is 5% or more, and is a heating element having flexibility based on the structural flexible function and the joint flexible function,
A heating element in which at least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less, and at least one loop stiffness of the section is 700 mN / cm or less. ,
A heating element in which intermittent cuts are provided in at least one section of the heating element having at least one loop stiffness of 700 mN / cm or less in the longitudinal direction across the section heating section region and the section of the storage body,
At least a part of each section heat generating part of the heat generating element having at least one loop stiffness in the longitudinal direction crossing the section heat generating area and the section of the storage body is 700 mN / cm or less is covered with a local ventilation material. A heating element that has a space surrounded by a ventilation side, a partitioning part, and a local ventilation material, and ventilates the heat generating composition from a side ventilation part facing the space part of at least the classification heating part,
At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less, the heating element has a minimum bending resistance of 70 mm or less, and a minimum bending resistance change is − A heating element that is 95-0,
A heating element having at least one loop stiffness of 700 mN / cm or less in the longitudinal direction across the section heating section area of the storage body constituting the heating element after the end of heat generation and the section section being the seal area,
The heating element is at least one selected from a single heating part heating element, a rectangular heating element, a warm heating element, and a foot heating element, and each heating element is at least partially breathable and includes the water content The exothermic composition is an exothermic body having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more,
The foot temperature heating element is a heating element that does not have intermittent cuts, has a full foot shape, and has a minimum bending resistance of 200 mm or more.
Heating element is a section heating element, rigid heating element, stripe heating element, detachable heating element, expansion heating element, band heating element, tunnel ventilation heating element, drug heating element, detachable tunnel ventilation heating element, detachable It is at least one selected from a medicine heating element, eye temperature heating element, face temperature heating element (nasal temperature heating element), and outer temporary folding heating element with outer bag, and a hydrous heating composition and a plurality of divided heating element regions, A partition heating part, which is a section heating part area in which the water-containing heat generating composition is stored, and a partition part which is a non-storing area for the heating composition are provided with a storage body integrated with the partitioning part and at least partly breathable. Are integrated, and a plurality of divided heat generating portions are provided at intervals with the divided portions as an interval, and at least a part of each of the water-containing heat generating compositions of the heat generating element having air permeability is composed of iron powder, carbon component, reaction accelerator, Essential component of water In addition, the surplus water value is 0, the rising temperature rising rate is 12 ° C./5 minutes or more, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body of each heat generating element. 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, and the minimum rigidity of the heating element A heating element having flexibility based on a structural flexibility function and an articulation flexibility function, having a softness of 70 mm or less and a minimum bending resistance change of -95 to 0;
A hydrous exothermic composition produced by the method for producing a heating element, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, having an excess water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or more. A heating element having an object,
A water-containing heat generating composition and a plurality of divided heat generating portion regions having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more And at least a part of the container is provided with an air-permeable storage body, and a classification heat generation part which is a classification heat generation part area in which the water-containing heat generation composition is stored and a classification non-storage area of the heat generation composition. The section is integrated, and a plurality of section heat generating sections are provided at intervals with the section section as an interval, and at least a part is air permeable, and the longitudinal direction crossing the section heat generating section region and the section section of the container At least one loop stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more. A heating element having a flexibility that is based on the structurally flexible features and joint manner flexible features,
A heat generating element having a water-containing heat generating composition having an iron powder, a carbon component, a reaction accelerator and water as essential components and having a surplus water value of 0 has a moisture permeability of 0.1 to 6.0 g / (m ² · day). It is the heat generating body enclosed with the outer bag comprised from a certain packaging material.
In addition, a heating element having a surplus water value of 0 produced by the method for producing a heating element of the present invention may be stored in an outer bag as it is until it is used, or a new outer bag or a package with lower moisture permeability may be used. The outer bag made of a material or a lower oxygen-permeable outer bag may be replaced and stored.
Further, by using the excess water exothermic composition produced in the air-mixed state, at least a part of the iron component in the exothermic composition is converted into an iron component having an iron oxide on at least a part of the surface. It is a method for conversion, and a method for producing a heating element containing the exothermic composition. An iron powder having an iron oxide on at least a part of its surface has good rise and heat generation.

  The packaging material of the base material and the covering material used for manufacturing the exothermic precursor of the present invention has a substantially planar surface.

In the present invention, the substantially planar surface means a storage pocket, storage compartment, storage area, cover pocket, cover compartment, cover area, which are provided in advance for storing or covering the exothermic composition molded body, A flat surface that does not have a concave or convex portion for storage, such as a corrugated cover.
The pocket is a storage pocket provided in advance in the packaging material for storing the entire exothermic composition, and is a pocket described in JP-T-2001-507593.
The storage compartment is a storage compartment provided in the packaging material in advance to store the entire exothermic composition, as described in Japanese Patent No. 316160 and Japanese Patent Publication No. 11-508314. It is a storage compartment.
Accordingly, there may be irregularities shallower than the height of the exothermic composition molded body, irregularities that cannot accommodate the entire exothermic composition molded body, or irregularities that are not intentionally stored or covered with the exothermic composition molded body. . Even if such unevenness is present in the base material or the covering material, the substantially flat base material or the substantially flat covering material is used.

“Undamaged natural environment” of the present invention is a place where the exothermic precursor and the exothermic body are held without being damaged, and there is no limitation if the annual average temperature is 5 ° C. or higher. The maximum temperature of the period is 5 ° C. or higher, preferably 10 ° C. or higher, more preferably 15 ° C. or higher, still more preferably 20 ° C. or higher, still more preferably 25 ° C. or higher, and further preferably 30 It is preferable that the temperature is not lower than 0 ° C. and the natural environment is not damaged to the exothermic precursor.
The annual average temperature is 5 ° C or higher, preferably 6 ° C or higher, more preferably 7 ° C or higher, still more preferably 10 ° C or higher, further preferably 15 ° C or higher, and further preferably 20 ° C. It is higher than 25 ° C, more preferably higher than 25 ° C.
The “holding place” of the present invention is not limited as long as it is a place where there is no damage to the heat generation precursor and the heat generation body due to external pressure or the like, but it is not limited to room, general warehouse, stock point, shipping warehouse, air conditioning warehouse, constant temperature Examples include a room, a drying room, a dehumidifying drying room, or the inside of a transportation means such as a container, a train, a truck, an automobile, a ship, and an airplane. Includes during transportation of transportation means. A place where a hygroscopic agent such as silica gel or hot air is used is also effective.
A method of storing the exothermic precursor enclosed in the outer bag in a cardboard box and storing it in a warehouse or a method of natural preservation is also included. In addition, a plurality of heat-generating precursors enclosed in an outer bag are packed in boxes or pillows, packed in cardboard boxes, and stored, stored and stored in warehouses such as retail stores, supermarkets, drug stores, mass retailers, and drug stores. Or the case where it is exhibited.
For example, several heat-generating precursors manufactured in Japan and sealed in a non-breathable outer bag are packed in boxes, and then packed in cardboard boxes and held in a shipping warehouse, and then sold in large quantities in domestic supermarkets, etc. After being transported to a store by truck or the like and held in the warehouse of the mass sales store, the exothermic precursor containing the surplus water exothermic composition is placed in the store and contains the surplus water exothermic composition for 25 years after production. An example is conversion to a heating element containing a hydrous exothermic composition having a value of 0. It is also an effective means to hold it at a stock point after production. The holding place is not limited to within Japan, and may be outside Japan. The manufacturing place, the shipping destination, and the store where the general user purchases are not limited to within Japan, and can be applied both within and outside Japan. It is also an effective place during transportation overseas by means of transportation.
In a natural environment, the retention time is preferably 25 to 2 years, but may be retained for a long period exceeding 2 years.

The temperature under the control environment of the present invention is 1 to 80 ° C, preferably 1 to 70 ° C, more preferably 1 to 60 ° C, still more preferably 5 to 60 ° C, and still more preferably. It is 5-50 degreeC, More preferably, it is 10-50 degreeC, More preferably, it is 10-40 degreeC, More preferably, it is 20-40 degreeC.
The humidity in the controlled environment of the present invention is preferably 99% or less, more preferably 95% or less, still more preferably 90% or less, still more preferably 80% or less, and further preferably 70. % Or less, more preferably 10 to 70%, further preferably 10 to 60%, further preferably 10 to 50%, still more preferably 10 to 45%, still more preferably 10 to 40%. %, More preferably 10 to 30%. Lower humidity is preferred.

The “holding period held in the environment” of the present invention is a period obtained by integrating the periods held in the environment continuously or intermittently. Periods placed in environments other than the prescribed environment are not accumulated.
The retained retention period is 25 hours to 2 years, preferably 25 hours to 1.5 years, more preferably 3 days to 1.5 years, and even more preferably 3 days to 1 year. More preferably, it is 7 days to 1 year, More preferably, it is 30 days to 1 year, More preferably, it is 30 days to 0.75 year, More preferably, it is 30 days to 0.5 year.

The moisture permeability of the packaging material constituting the outer bag, which is a non-breathable containing bag containing the exothermic precursor of the present invention, is the moisture permeability by the rissy method under conditions of atmospheric pressure, temperature 40 ° C., humidity 90% RH, Preferably it is 0.1-6.0 g / (m < ² > * day), More preferably, it is 0.1-5.0 g / (m < ² > * day), More preferably, it is 0.1-4.0 g / (M ² · day), more preferably 0.2 to 4.0 g / (m ² · day), still more preferably 0.3 to 4.0 g / (m ² · day), Preferably it is 0.4-4.0 g / (m < ² > * day), More preferably, it is 0.5-4.0 g / (m < ² > * day), More preferably, it is 0.3-3.8 g / a ^(m 2 · day), still more preferably ^{0.4~3.5g / (m 2 · day)} , more preferably .5～3.0G ^/ a (m 2 · day), more preferably from ^{0.5~2.0g / (m 2 · day)} , more preferably 0.5~1.9g / ^{(m 2} Day), more preferably 0.5 to 1.8999 g / (m ² · day), still more preferably 0.5 to 1.85 g / (m ² · day), and even more preferably 0 0.5 to 1.5 g / (m ² · day), more preferably 0.5 to 1.4999 g / (m ² · day), and still more preferably 0.5 to 1.45 g / (m ^2. Day).

The oxygen permeability of the packaging material constituting the outer bag, which is a non-breathable containing bag containing the exothermic precursor of the present invention, is determined under the conditions of oxygen permeability, atmospheric pressure, temperature 23 ° C., humidity 90%. oxygen permeability by measuring Mocon Inc. of measuring, There 10ml ^/ (m 2 · day) above 0, preferably ^{0.05~10ml / (m 2 · day)} , more preferably 0. 05 to 8 ml / (m ² · day), more preferably 0.05 to 7 ml / (m ² · day), still more preferably 0.05 to 6 ml / (m ² · day), Preferably, it is 0.05 to 5 ml / (m ² · day), more preferably 0.05 to 4 ml / (m ² · day), and further preferably 0.05 to 3 ml / (m ² · day). , and still more preferably 0.05~2ml / ^(m 2 · d a y), more preferably from ^{0.05~1ml / (m 2 · day)} , still more preferably ^{0.05~0.5ml / (m 2 · day)} , more preferably 0.1 0.5 ml / (m ² · day).

  Examples of the packaging material of the outer bag of the present invention include polyethylene, polypropylene, polyester, polyvinyl alcohol, ethylene vinyl alcohol copolymer, saponified ethylene-vinyl acetate copolymer, nylon, polyvinylidene chloride and other films, sheets, aluminum, etc. Vapor deposited film on which metal oxide such as silicon oxide or aluminum oxide is deposited, metal foil laminate film such as aluminum, biaxially stretched polyvinyl alcohol film and polyvinylidene chloride coated film, or a laminated film of two or more of these A film with a sealant film bonded to a film with excellent airtightness, such as a film provided with a heat seal material, a film with a sealant film bonded to a bonded film between the films with excellent airtightness, or the airtight A composite film in which a film having excellent properties and a polyethylene film, a propylene film, a polyester film, a polyvinyl alcohol film, a nylon film, or a biaxially stretched film thereof are bonded together with a sealant film or a heat sealing material An example is provided with the. In particular, a film or sheet having an oxygen and / or water vapor barrier layer is useful. As a material for forming the barrier layer, polyvinyl alcohol, ethylene vinyl alcohol copolymer, saponified ethylene-vinyl acetate copolymer, metal oxide such as polyvinylidene chloride, silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, etc. Examples thereof include metal nitrides such as metal oxynitrides such as silicon oxynitride and aluminum oxynitride, and metal foils such as aluminum foil.

Here, the sealant film is a resin film having a relatively low melting point, and is used for heat-sealing these films bonded to a film having a relatively high melting point. Thermal seal such as low density polyethylene film, medium density ethylene film, high density polyethylene film, propylene-ethylene copolymer film, ionomer film, ethylene-acrylic acid film, ethylene-methacrylic acid film, ethylene-vinyl acetate film as sealant film An example is a film deposited.
The outer bag of the present invention is formed as a bag by heat-sealing two of these packaging materials, and the inner bag is sealed to form an outer bag. The thickness of the outer bag is not limited, but is preferably about 20 to 200 μm, more preferably 30 to 100 μm.

The exothermic precursor of this invention contains the exothermic composition molded object which shape | molded the exothermic composition whose surplus water value is 0.5-80. The entire surface may be air permeable or partially air permeable. The exothermic composition compact also includes a exothermic composition compact that is a compressed exothermic composition compact.
As an example of the exothermic precursor of this invention, what used the exothermic composition molded object and the exothermic body as the exothermic precursor in FIGS.
The production method of the exothermic precursor of the present invention is not limited as long as it is a production method of a heating element having an excess water exothermic composition. The exothermic composition molded body obtained by molding the moldable exothermic composition into a desired shape is laminated on the base material by a casting molding method using a mold, covered with a covering material, and the peripheral portion of the exothermic composition molded body is sealed. One example is the method. In this case, a magnet may be used. It can be used for storing exothermic compositions in bags and molds by combining smooth filling blades and magnets, and for releasing molds from molds using magnets. Molding of exothermic composition molded bodies and production of exothermic precursors Becomes easier.
A method for producing a heating element is preferred in which the exothermic composition molded body is laminated on a substantially planar packaging material, the packaging material is further laminated, and the peripheral edge of the exothermic composition part molded body is sealed.

When the exothermic composition molded body is produced by a mold forming method such as the above-described mold forming method or cast molding method, the surplus water value of the surplus water-containing exothermic composition is preferably 0.5 to 80, more preferably 5 ~ 80.
Also, the molded exothermic composition molded body is laminated on a water-absorbing packaging material, covered with a covering material, and the peripheral portion of the exothermic composition molded body is a pressure seal using an adhesive or a heat seal using a heat seal layer, etc. May be sealed to produce an exothermic precursor.
Further, the molded exothermic composition molded body is laminated on the nonwoven fabric, and further covered with the nonwoven fabric, pressed with a press roll, partially dried with hot air of 30 to 100 ° C. (nitrogen or air, etc.), and lower excess water It may be produced by forming a heat-generating composition molded body having a value, cutting and laminating a sheet on a substrate, covering with a covering material, and sealing the peripheral edge of the heat-generating composition molded body.

  When heat-sealing a packaging material such as the base material and the covering material, a temporary adhesive layer made of an adhesive is provided on at least one of the heat-sealing layers in addition to a normal heat-sealing method, and temporarily applied by pressing pressure. A temporary heat-sealing method may be performed in which temporary attachment is performed via a deposition layer and then heat sealing is performed. In this case, the seal portion includes a layer of the heat sealing material in which the temporary adhesive layer component and the heat sealing material are mixed. The temporary heat sealing method is a sealing method useful for increasing the speed of heat sealing. The heat sealing material may also serve as a packaging material such as a base material or a coating material.

The die-through molding method uses a punching die, molds a moldable excess water exothermic composition, laminates a punching exothermic composition molded body on a substrate, and generates a heat generating composition molded body. It is a method of manufacturing. The punching die is a die having a through hole having a desired shape and thickness. A drum-shaped forming apparatus in which the through-hole is provided on the rotating surface of a hollow drum-shaped rotating body, a chain conveyor-shaped forming apparatus using a chain conveyor-shaped rotating body in which a plurality of sheet-shaped molds having the through-hole are provided Is given as an example.
As the continuous production method, a rotary punching die is used, and a molding machine for laminating a die-shaped exothermic composition molded body on a long base material and covering it with a long covering material, Using a rotary sealer that can seal the surrounding part of the section and the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), and around the exothermic composition molded body through the seal An example is a continuous manufacturing method in which the necessary portions of the section and the section are heat sealed and sealed.

The casting molding method is a method for producing a heating composition molded body by filling a moldable excess water heating composition into a casting mold having a recess and laminating the molded heating composition molding on a substrate. is there. The punching die is a die having a recess having a desired shape and thickness. An example of the exothermic composition molded body manufacturing apparatus in which a concave portion is provided on the outer surface of a hollow drum-shaped rotating body is an example.
As the continuous manufacturing method, a molding machine for laminating a heat generating composition molded body on a long base material by filling the concave portion with a hollow drum-shaped rotating body and transferring it to the base material, and a long covering material Using a rotary sealer that can cover the target section and seal the periphery of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), the exothermic composition through the seal An example is a continuous production method in which the peripheral portions of the molded body and the necessary portions of the divided portions are heat sealed and sealed.

  You may compress the surplus water exothermic composition and exothermic composition molded object of this invention. Compression is not limited, but in-mold compression and out-of-mold compression are examples.

  The in-mold compression means that the exothermic composition is compressed in the mold by a flexible rubber roll or a compression mold similar to the storage section while the excess water exothermic composition is present in the mold storage section. As the compression ratio, the thickness of the compressed body (heat generating composition heating element) is not limited, but is preferably 50 to 99.5% of the mold thickness, and more preferably 50 to 95%. More preferably, it is 55-95%, More preferably, it is 60-95%, More preferably, it is 70-90%. The pressure at the time of pressurization is not limited as long as the moldable exothermic composition can be compressed to a predetermined thickness. The compression means used for compression molding is not limited, but examples include a flat plate and roll having elasticity such as rubber, and a flat plate and roll having a pushing portion that can be inserted into a mold cavity.

  The out-of-mold compression is to compress the exothermic composition molded body with a roll or the like after the exothermic composition is separated from the mold and becomes a exothermic composition molded body. This is usually performed after the exothermic composition molded body is covered with a covering material and / or a covering material, but it may not be covered. There is no restriction on the pressure during pressurization. There is no restriction on the compression rate.

The mold formability of the present invention is a function that allows the shape of the through hole to be maintained even after it is housed in a mold having a through hole and the mold is removed. 25 and 26 are cross-sectional views illustrating the moldability.
25 (a) to 25 (d) are cross-sectional views illustrating moldability.
Explains the moldability of the exothermic composition 53 having moldability. Measurement is performed using a mold formability measuring device 61. The measurement plate 42 is placed on the non-water-absorbing plastic film 50 provided on the support plate 47, and then the exothermic composition 53 is placed on the measurement plate 42. Even if the measuring plate 42 is removed after the cylindrical through-hole 43 of 42 is filled and the magnet 62 is removed, the exothermic composition 53 having the moldability has a moldability. The shape of the through hole 43 is maintained.
FIGS. 26A to 26D are cross-sectional views illustrating non-moldability.
The non-molding property of the exothermic composition 53 having no moldability is described. Although the same operation as FIG. 25 is performed, since the non-molding exothermic composition 53 does not have moldability, the shape of the cylindrical through hole 43 cannot be maintained after the measurement plate 42 is removed. It has collapsed in all directions.

  The surplus water exothermic composition has a formability because surplus water serves as a connecting substance, and the components of the exothermic composition are put together into a sand dango state. The excess water exothermic composition can be molded with a mold. Due to this formability, heating elements of various shapes and sizes can be manufactured.

The surplus water-containing exothermic composition having excess water has good moldability and is formed into various shapes and exothermic composition molded bodies of various sizes, but the exothermic composition molded body has excess water, The supply of oxygen to the iron powder is hindered, the rising temperature rise rate is slow, and the rising heat generation property is poor.
On the other hand, a water-containing exothermic composition that does not have surplus water has good exothermic characteristics, but has no moldability because there is no surplus water. Therefore, only a limited number of shapes and sizes of heating elements can be manufactured, and cannot meet various needs.

  Therefore, after producing exothermic precursors of various shapes and sizes using the moldable surplus water exothermic composition, this conversion method does not damage the exothermic precursor and the contents of the exothermic precursor. Is converted into a hydrous exothermic composition with good rise and exothermic properties. As a result, it is possible to manufacture various shapes and sizes of heating elements with good rising heat generation properties.

  The exothermic composition molded body may be a exothermic composition compressed body in which the excess water exothermic composition is compressed, and the exothermic composition molded body of the present invention also includes an excess water exothermic composition compressed body. A breathable pressure-sensitive adhesive layer may be provided between the substrate or the exothermic composition molded body and the covering material.

  In the exothermic precursor of the present invention, it is considered that the exothermic precursor (sectioned exothermic part) is formed in advance by a breathable wrapping material and a non-breathable wrapping material, and after the local ventilating material is provided, a ventilation blocking sheet is bonded. However, in the manufacturing process, a breathable local ventilation material and a ventilation blocking sheet are first laminated to prepare a composite sheet in advance, and then the composite sheet and the non-breathable sheet are bonded together to form a ventilation blocking sheet. The provided exothermic precursor may be produced.

    The segmented heat generating part exothermic precursor of the present invention is not limited as long as the exothermic body has predetermined physical properties when converted into an exothermic body, but contains iron powder, carbon component, reaction accelerator, and water as essential components. A surplus water exothermic composition having a surplus water value of 0.5 to 80 is used, and a plurality of section heat generating section regions and section sections are integrated, and at least a part is provided with a breathable container, A segmented heat generating part, which is a segmental heat generating part region in which the exothermic composition is stored, and a segmented part, which is a non-contained area of the exothermic composition, are integrated, and a plurality of segmented heat generating units are provided with intervals between the segmented parts. And at least a portion is breathable.

The exothermic precursor and exothermic body of the present invention comprise a single exothermic part exothermic precursor and a segmented exothermic part exothermic precursor.
Since the exothermic precursor and the exothermic body of the present invention are basically the difference between the exothermic composition containing the excess water composition and the hydrous exothermic composition, the following items necessary for the exothermic precursor are described below. The exothermic precursor follows, and the heating element follows the matters necessary for the heating element from the above described items, and the heating element is mainly described.

The heating element of the present invention is a heating element converted from an exothermic precursor, and has a hydrous heating composition converted from a heating composition molded body obtained by molding an excess water heating composition.
The air permeability of the heating element of the present invention may be at least part of the heating element. It may be on both sides. It is preferable to have a fixing means in at least a part of the exposed portion of the heating element of the present invention. The shape of the heating element of the present invention and the shape of the section heating part are not necessarily the same. Further, the heating element and / or the section heating part may be provided with corners in a substantially arc shape (R shape), and the corners may be curved or curved.
The excess water value of the hydrous exothermic composition is 0, and the rising temperature rising rate is 12 ° C./5 minutes or more, preferably 40 ° C./5 minutes or more.
Further, the difference between the rising temperature rising rate of the hydrous exothermic composition and the rising temperature rising rate of the excess water exothermic composition exceeds 0 ° C./5 minutes, preferably 8 ° C./5 minutes or more.

  The heating element of the present invention includes a single heating part heating element having one heating part and a segment heating part heating element having a heating part composed of a plurality of segment heating parts and a partitioning part. A breathable pressure-sensitive adhesive layer may be provided between the substrate or the exothermic composition molded body and the covering material. It is preferable to provide a fixing means on at least a part of the exposed portion of the heating element.

  The outer shape of the heating element and the heating precursor of the present invention is not limited, but is rectangular, square, blister, eye mask, bowl, bowl, rounded rectangle, rounded square, egg, boomerang, Examples include tama-shaped, star-shaped, wing-shaped, nose-shaped, lantern-shaped, and foot-shaped. The airfoil is suitable around the neck and shoulders. Moreover, you may form the angle of the outer shape of a heat generating body and a heat generating precursor in a substantially circular arc shape.

The shape of the exothermic composition molded body or the section heat generating portion may be any shape, but it is a planar shape, such as a circle, an ellipse, a football shape, a triangle, a square, a rectangle, a hexagon, a polygon, a star shape, a flower shape, a ring shape, etc. Is given as an example. In three-dimensional shape, disk shape, pyramid shape, spherical shape, cubic shape, polygonal pyramid shape, cone shape, frustum shape, spherical shape, parallelepiped shape, cylindrical shape, rectangular parallelepiped shape, polyhedron shape, ellipsoid shape, Examples include a semi-cylindrical shape, a semi-elliptical cylinder shape, a bowl shape, a cylindrical shape, and an elliptic cylinder shape. Further, in these shapes, the corners may be provided in a substantially arc shape (R shape), the corners may be curved or curved, or the center may have a recess.
In the present invention, a region corresponding to a corner (an end corner) such as an exothermic composition molded body, a heat generating portion, a segmented heat generating portion, a heat generating precursor, a seal portion, a through hole, a concave portion, or a convex portion is formed in a substantially arc shape. (R) shape). Although there is no restriction | limiting in the curvature radius as this substantially circular arc shape (r (r) shape) shape, Preferably it is 0.1-20.0 mm, More preferably, it is 0.1-10.0 mm, Furthermore, Preferably it is 0.1-5.0 mm, More preferably, it is 0.3-5.0 mm, More preferably, it is 0.3-3.0 mm, More preferably, it is 0.5-2.0 mm .

  The single heating part heating element of the present invention is a heating element having a single heating part in which a heating part having a water-containing heating composition having a surplus water value of 0 is formed, and at least a part of the heating element. Has breathability. The shape of the heating element and the shape of the heating part are not necessarily the same. Further, the heating element and / or the heating part may be provided with corners in a substantially arc shape (R shape), and the corners may be curved or curved. Examples of the heating element include a rectangular heating element, a warm heating element, and a foot heating element (further, there are foot heating elements that have a plurality of section heating elements but are not subject to loop stiffness).

Although there is no restriction | limiting in the size of the said single heat-emitting part, Preferably it is the following size.
In the shape of a disk, a circle, an ellipse or the like, the size is not limited, but the height is preferably 0.1 to 20 mm, more preferably 0.3 to 20 mm, and still more preferably. It is 0.5-20 mm, More preferably, it is 0.5-10 mm, More preferably, it is 0.5-8 mm. The diameter or maximum diameter is preferably 3 to 200 mm, more preferably 5 to 200 mm, still more preferably 5 to 180 mm, still more preferably 5 to 150 mm, and still more preferably 5 to 100 mm. More preferably, it is 5-50 mm.
In shapes other than the above, the size is not limited, but the length is preferably 3 to 200 mm, more preferably 5 to 200 mm, still more preferably 5 to 180 mm, and still more preferably. 5 to 150 mm. The height is preferably 0.1 to 20 mm, more preferably 0.3 to 20 mm, still more preferably 0.5 to 20 mm, still more preferably 0.5 to 10 mm, and still more preferably. 0.5-8 mm. The width is preferably 3 to 200 mm, more preferably 5 to 200 mm, still more preferably 5 to 180 mm, still more preferably 5 to 150 mm, and still more preferably 5 to 100 mm.

The segment heating part heating element of the present invention is a segment heating part having a water-containing heating composition with a surplus water value of 0 and a seal region, and has a partitioning part that is a hinge, preferably 2 or more, preferably 3 or more, More preferably, four or more, more preferably five or more of the plurality of divided heat generating portions have heat generating portions provided at intervals with the divided portions as intervals, and the divided heat generation of the storage body of the heat generating bodies It is a heating element having a flexible function composed of two functions of a structural flexible function and an articulated flexible function, in which at least one loop stiffness in the longitudinal direction crossing the partial region and the section is 700 mN / cm or less. At least a part of the heating element has air permeability. There are no restrictions on the shape of the section heating section, heating section, and heating element.
The heating element and / or the section heating part may be provided with corners in a substantially arc shape (R shape), and the corners may be curved or curved.

The heating element according to the present invention has a flexible function composed of two functions of a structural flexible function and an articulated flexible function supported by various physical properties, and is thin, before heat generation, during heat generation, and end of heat generation. It is a heating element that is flexible and soft to the touch after use, that is, before use, during use, and after use.
Further, in the heating element, when the heating element is adhered to the skin side of clothing that comes into contact with the skin with the heating element having the fixing means, in particular, the divided heating part heating element having the fixing means, the adhesion to the breathable surface side in particular. In the case of the heating element using the agent layer as a fixing means, the body can be directly heated without causing any harmful effects on the skin, and it cannot be obtained with the direct-attaching heating element. In the case of a double-sided breathable heating element, in the case of a heating element having an adhesive layer as a fixing means on the non-breathable surface side, steam generated from the heating element can be supplied to the skin.
The divided heat generating part heating element of the present invention forms a divided heat generating part heating element group including its deformation. Rigid soft heating element, stripe heating element, separable heating element, telescopic heating element, band heating element, tunnel ventilation heating element, drug heating element, detachable tunnel ventilation heating element, detachable drug heating element, outer temporary attachment with outer bag A folding heating element is an example. An example of a heating element with intermittent cuts is a separable heating element, a stretchable heating element, a detachable tunnel ventilation heating element, and a detachable medicine heating element.

It is preferable that the segment heating part heating element of the present invention further has at least one of the following items.
1) The maximum tensile strength at 25 ° C. of at least one of the sections is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more.
2) The loop stiffness of at least one section is 700 mN / cm or less.
3) Intermittent cuts are provided in at least a partial region of the section.
4) Further, at least a part of each divided heat generating part is covered with a local ventilation material, and has a space part surrounded by the ventilation side, the divided part and the local ventilation material of the divided heat generating part, and at least the space part of the divided heat generating part. The exothermic composition is ventilated from the side vent portion facing the surface.
5) The minimum bending resistance is 70 mm or less, and the minimum bending resistance change is −95 to 0.
6) The minimum bending resistance is 70 mm or less, and the minimum bending resistance difference is 0 mm or less.

  In particular, when the loop stiffness of the storage body of the storage unit of the heating element according to the present invention is 300 mN / cm or less, preferably 0.01 to 250 mN / cm, more preferably 0.01 to 250 mN / cm, The heat generating part has excellent flexibility that the section of the heating element can be easily bent. Furthermore, when the loop stiffness of at least one section is 300 mN / cm or less, preferably 0.01 to 250 mN / cm, more preferably 0.01 to 250 mN / cm, the section of the section heating section heating element is Has excellent flexibility to bend more easily.

It is preferable that at least one loop stiffness in the longitudinal direction crossing the sectioned heat generating region and the sectioned portion of the heat generating body storage body is 700 mN / cm or less.
Furthermore, it is preferable that the segment heating part heating element after completion of heat generation of the present invention has at least one of the following items.
1) The maximum tensile strength at 25 ° C. of at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more.
2) The maximum tensile strength at 25 ° C. of at least one of the sections is 20 g / mm width or more, and the breaking elongation at 25 ° C. is 5% or more.
3) The loop stiffness of at least one section is 700 mN / cm or less.
4) At least one selected from the loop stiffness of the section, the maximum tensile strength at 25 ° C., and the elongation at break is 0.3 to 1.7 times the average value of the corresponding physical property values of each region. Has physical properties.
5) The minimum bending resistance is 70 mm or less.
6) The minimum bending resistance change is -95 to 0.
7) The minimum bending resistance difference is 0 mm or less.

  In the heating element having the fixing means of the present invention, in particular, in the divided heating part heating element having the fixing means, when the heating element is adhered to the skin side of the clothing that comes into contact with the skin, the adhesive layer is particularly fixed on the breathable surface side. In the case of the heating element used as a means, the body can be directly heated without any harmful effects due to the adhesive on the skin. In the case of a double-sided breathable heating element, in the case of a heating element having an adhesive layer as a fixing means on the non-breathable surface side, steam generated from the heating element can be supplied to the skin.

  In the divided heat generating portion structure of the present invention, the divided heat generating portion is formed in a unified structure having at least two facing surfaces, preferably a film layer substrate surface, wherein at least one surface is breathable and generates heat. When the composition molded body (exothermic composition) is accommodated, the air permeable region where the convex portion is formed is composed of the top ventilation portion and the side ventilation portions on both sides. The exothermic composition molded body volume, the space volume, and the section heating part volume have the following relationship. The exothermic composition molded body volume is the volume of the exothermic composition molded body itself, the spatial volume is the volume that is not occupied by the exothermic composition molded body in the section heating section, and the section heating section volume is that of the section heating section. The volume is the sum of the space volume and the exothermic composition molded body volume.

Although there is no restriction | limiting in the size of the said division | segmentation exothermic part and the size of a heat-generating composition molded object, Preferably it is the following size.
1) In the case of disk shape and disk-like shape The diameter or maximum diameter is preferably 1 to 60 mm, more preferably 2 to 50 mm, still more preferably 10 to 40 mm, and further preferably 20 to 30 mm. .
The height is preferably 0.1 to 20 mm, more preferably 0.3 to 20 mm, still more preferably 0.5 to 20 mm, still more preferably 0.5 to 10 mm, and still more preferably. It is 0.5-9 mm, More preferably, it is 0.5-8 mm, More preferably, it is 0.5-7 mm, More preferably, it is 1-7 mm.
The volume is preferably about 0.0045 to 20 cm ³ , more preferably 0.2 to 11 cm ³ .
2) When the shape is other than the above 1) (rectangular, rectangular-like shape, etc.) The width is preferably 0.5 to 60 mm, more preferably 0.5 to 50 mm, still more preferably 1 to 50 mm. Yes, more preferably 3 to 50 mm, still more preferably 3 to 30 mm, still more preferably 5 to 20 mm, still more preferably 5 to 15 mm, and still more preferably 5 to 10 mm.
Further, the height is preferably 0.1 to 30 mm, more preferably 0.1 to 20 mm, more preferably 0.1 to 10 mm, still more preferably 0.3 to 10 mm, and further Preferably it is 0.5-10 mm, More preferably, it is 0.5-7 mm, More preferably, it is 1-7 mm.
The length is preferably 5 to 300 m, more preferably 5 to 200 mm, more preferably 5 to 100 mm, still more preferably 20 to 100 mm, and still more preferably 30 to 100 mm.
Further, the surface area is not limited as long as it has a function as a segmented heat generating portion, but is preferably about 50 cm ² or less, more preferably about 40 cm ² or less, still more preferably less than about 25 cm ² , still more preferably. Is less than 20 cm ² .
The volume of the divided heat generating part or the volume of the exothermic composition molded body is usually 0.015 to 500 cm ³ , preferably 0.04 to 500 cm ³ , more preferably 0.04 to ³⁰ cm ³ , More preferably, it is 0.1-30 cm < ³ >, More preferably, it is 1-30 cm < ³ >, More preferably, it is 1.25-20 cm < ³ >, More preferably, it is 1.25-10 cm < ³ >, More preferably, 3 -10 cm ³ .

  The width of the section is not limited, but is preferably 0.1 to 50 mm, more preferably 0.2 to 50 mm, still more preferably 0.3 to 50 mm, and still more preferably 0.3. It is -40mm, More preferably, it is 0.5-40mm, More preferably, it is 0.5-30mm, More preferably, it is 1-20mm, More preferably, it is 3-10mm.

  When the exothermic composition molded body is accommodated in the segmented exothermic part, which is the exothermic composition storage area, the volume of the exothermic composition molded body, which is the exothermic composition molded area, and the exothermic composition storage area, The volume ratio with the volume of the segmented heat generating part is usually 0.6 to 1, preferably 0.7 to 1, more preferably 0.8 to 1, and further preferably 0.9 to 1. It is. In the case of a single heat generating part, the section heat generating part is a heat generating part.

“Providing the segmented heat generating portion of the present invention at intervals in the form of stripes”
A plurality of divided heat generating portions are provided in a streak-like shape (elongated and continuous) at intervals (parallel lines, parallel curves, etc.). One streak is preferably composed of one section heat generating portion. In this case, the section heating section and the section section may be linear or curved.
Moreover, as long as the following conditions are satisfied, one streak may be composed of two or more divided heat generating portions and one or more divided portions.

T ≧ 2.5S and P ≦ 0.5T

T: Length of one section heating part
S: Width of one section heating part
P: Length of the section

One example is the arrangement of streaks composed of segmented heat generating portions in parallel stripes (vertical stripes, horizontal stripes, diagonal stripes, vertical wave stripes, horizontal wave stripes, diagonal wave stripes, etc.).

The rising temperature rising rate of the present invention is a rising temperature rising rate measuring method,
It is the difference (Te−Ts) between the temperature (Ts) at the start of the test and the temperature (Te) after 5 minutes from the test.

  The hydrous exothermic composition of the present invention is not limited as long as it contains iron powder, a carbon component, a reaction accelerator, and water as essential components, the surplus water value is 0, and the rising temperature rise rate is 12 ° C./5 minutes or more.

  The rising temperature rising rate of the hydrous exothermic composition is preferably 12 ° C./5 minutes or more, more preferably 18 ° C./5 minutes or more, still more preferably 20 ° C./5 minutes or more, and further preferably 25 ° C./5 minutes or more, more preferably 30 ° C./5 minutes or more, more preferably 35 ° C./5 minutes or more, further preferably 40 ° C./5 minutes or more, more preferably 50 ° C. / 5 minutes or more, more preferably 55 ° C / 5 minutes or more, and still more preferably 60 ° C / 5 minutes or more.

  In the method for producing a heating element of the present invention, the difference between the rising temperature rise rate of the surplus water exothermic composition having an excess water value of 0.5 to 80 and the rising temperature rise rate of the hydrous exothermic composition having an excess water value of 0 Is not limited as long as it exceeds 0 ° C / 5 minutes, preferably 8 ° C / 5 minutes or more, more preferably 10 ° C / 5 minutes or more, and further preferably 15 ° C / 5 minutes or more. Yes, more preferably 20 ° C./5 minutes or more, more preferably 30 ° C./5 minutes or more, still more preferably 40 ° C./5 minutes or more, and further preferably 50 ° C./5 minutes or more.

  In the present invention, the exothermic composition molded body obtained by molding the excess water exothermic composition also includes a compressed exothermic composition compressed body.

  The surplus water exothermic composition of the present invention contains iron powder, carbon component, reaction accelerator and water as essential components, the surplus water value is 0.5 to 80, and the rising temperature rising rate is not limited, Preferably it is 0-30 degreeC / 5 minutes, and if there is moldability, there will be no restriction | limiting.

The surplus water value of the surplus water exothermic composition of the present invention is 0.5 to 80, preferably 1 to 80, more preferably 2.5 to 80, and further preferably 5 to 80. More preferably, it is 5-70, More preferably, it is 5-65, More preferably, it is 5-60, More preferably, it is 10-60, More preferably, it is 10-55, More preferably, it is 10 It is -50, More preferably, it is 10-40, More preferably, it is 10-35, More preferably, it is 10-30.
The rising temperature rising rate of the excess water exothermic composition is not limited, but is preferably 0 to 30 ° C / 5 minutes, more preferably 0 to 20 ° C / 5 minutes, and still more preferably 0. -10 ° C / 5 minutes or more, more preferably 0-5 ° C / 5 minutes.

  The rising temperature rising rate of the excess water exothermic composition is 0 ° C./5 minutes, more preferably 0 ° C./5 minutes or more, still more preferably 1 ° C./5 minutes or more, still more preferably 2 ° C / 5 minutes or more, more preferably 5 ° C / 5 minutes or more, and 7 ° C / 5 minutes or more.

  The excess water exothermic composition, the hydrous exothermic composition is an oxidized exothermic composition, an activated iron powder having a binding oxygen such as iron oxide at least part of its surface, or an active iron powder having a carbon component. An exothermic composition containing can also be used.

Moreover, the surplus water exothermic composition and the hydrous exothermic composition (hereinafter referred to as exothermic composition) of the present invention may contain other components in addition to the above components. Molding aids, functional substances, water retention agents such as wood flour and vermiculite, water-absorbing polymers such as crosslinked poly (meth) acrylic acid and poly (meth) acrylamide, hydrogen generation inhibitors such as sodium sulfite, slaked lime, etc. PH adjusters, aggregates such as fossil corals, nonions such as polyoxyethylene alkyl ethers, surfactants such as amphoteric ions, anions and cations, hydrophobic polymer compounds such as polyethylene and polypropylene, dimethyl silicone oil, etc. Far-infrared radiation materials such as organosilicon compounds, ceramics, negative ion generators such as tourmaline, pyroelectric materials, heat generation aids such as ferrous chloride, metals other than iron such as silicon and aluminum, iron oxides such as manganese dioxide Other metal oxides, acidic substances such as hydrochloric acid, maleic acid and acetic acid, fibrous materials such as pulp and cotton, urea Fuel components, humectants such as glycerin or hyaluronic acid, additional components consisting of the release agent or a mixture thereof as an example.
In addition, the component of the exothermic composition of this invention can select and use suitably any component of the exothermic composition currently disclosed or marketed or used for a well-known disposable warmer and a heat generating body.

  Although there is no restriction | limiting of the particle size of the water-insoluble solid component of the component of the exothermic composition of this invention, Preferably it is 900 micrometers or less, More preferably, it is 300 micrometers or less. The smaller the particle size, the better. In particular, it is preferable to use a 0.1-300-micrometer thing. In addition, iron powder having a particle size of 120 to 300 μm, preferably 150 to 300 μm is preferable for long-term heat generation, and 5 to 40 μm, preferably 10 to 32 μm is preferable for immediate heat generation. The moldability and shape retention of the exothermic composition are improved as the particle size of the water-insoluble solid component excluding the reaction accelerator, the water-soluble substance and water is smaller. The particle size is the average measured by the maximum length or the dynamic light scattering method, the laser diffraction method, etc. in the form in which the amount passing through the sieve is indicated in μm units from the sieve opening (diameter of the sieve) etc. Refers to particle size.

The mixing ratio of the exothermic composition of the present invention is not particularly limited, but the carbon component is 0.01 to 100 parts by weight and the reaction accelerator is 0.01 to 50 parts by weight with respect to 100 parts by weight of the iron powder. The mixing ratio is preferably selected so that the water content is 0.5 to 60 parts by weight.
Further preferably, the following composition may be added to the exothermic composition at the following blending ratio with respect to the iron powder.
That is, with respect to 100 parts by weight of iron powder, water retaining agent 0.01-20 parts by weight, water-absorbing polymer 0.01-20 parts by weight, pH adjuster 0.01-5 parts by weight, hydrogen generation inhibitor 0.01 ~ 12 parts by weight, metals other than iron 1.0-50 parts by weight, metal oxides other than iron oxide 1.0-50 parts by weight, surfactant 0.01-5 parts by weight, hydrophobic polymer compound, bone Materials, fibrous materials, functional materials, organosilicon compounds and pyroelectric materials are each 0.01 to 10 parts by weight, moisturizers, fertilizer components and exothermic assistants are each 0.01 to 10 parts by weight, acidic substances 01 to 1 part by weight is preferred. In addition, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed. This blending ratio can also be applied to a reaction mixture and an exothermic mixture used for improving exothermicity by partial oxidation. The excess water value of the reaction mixture is preferably less than l.
Moreover, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.

Examples of the iron powder include, but are not limited to, cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. The type of metal contained as an alloy or the like is not particularly limited as long as the iron component acts as a component of the exothermic composition, but examples include metals such as aluminum, manganese, copper, and silicon, and semiconductors. The metal of the present invention includes a semiconductor. Examples of the iron powder and other metals having a fibrous form include steel fibers, aluminum fibers, and magnesium fibers.
In the iron powder of the present invention, the content of metals other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the entire iron powder.

As the iron powder having an oxygen-containing film on at least a part of the iron surface,
A. An active iron powder in which an essential component of an exothermic composition or an acidic substance or other necessary component added thereto is contact-treated with an oxidizing gas, the iron component is partially oxidized, and the surface of the iron component is at least partially oxidized,
B. An active iron powder having a wustite content of 2 to 50% by weight as an X-ray peak intensity ratio of iron,
C. Iron powder having an iron oxide film with a thickness of 3 nm or more on the surface,
D. Non-water-absorbing base material made of exothermic composition formed by molding a surplus water exothermic composition containing iron powder, carbon component, reaction accelerator and water as essential components and surplus water value of 0.5-80 The exothermic precursor sandwiched between the non-water-absorbing coating material has a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day). After being enclosed in an outer bag made of a certain packaging material, in a natural environment not damaged and in a kind of controlled environment selected from an environment where the holding temperature is 1 to 80 ° C. and the holding humidity is 1 to 90% By maintaining the retention time to be at least 25 hours to 2 years, at least part of the iron component in the exothermic composition is converted to have iron oxide on at least part of the surface. powder,
E. A mixture of active iron powder and iron powder other than active iron powder,
Etc. are mentioned as an example.

The thickness of the iron oxide film which is an oxygen-containing film covering the surface of the iron powder is usually 3 nm or more, preferably 3 nm to 100 μm, more preferably 20 nm to 100 μm, using Auger electron spectroscopy. More preferably, the thickness is 30 nm to 100 μm, more preferably 30 nm to 50 μm, still more preferably 30 nm to 1 μm, still more preferably 30 nm to 500 nm, and still more preferably 50 nm to 300 nm. By making the thickness of the iron-containing film of iron 3 nm or more, the thickness of the iron-containing film of iron can exert the effect of promoting the oxidation reaction, and contact the oxidizing gas such as air to immediately start the oxidation reaction. Can be started. If the thickness of the iron oxygen-containing coating is 100 μm or more, the heat generation time may be shortened, but it can be used depending on the application.
On the other hand, in the active iron powder having wustite, the amount of wustite is usually 2 to 50% by weight, preferably 5.01 to 50% by weight, more preferably as the X-ray intensity ratio with iron. It is 5.01 to 40 weight%, More preferably, it is 6 to 40 weight%, More preferably, it is 7 to 30 weight%, More preferably, it is 7 to 25 weight%. Even if it exceeds 50% by weight, the heat build-up is good, but the heat generation duration is shortened. When it is less than 2% by weight, the heat build-up becomes dull.
The amount of wustite was evaluated using an X-ray analyzer as a ratio of the integrated intensity of the peak of wustite 220 to the integrated intensity of the peak of 110 face of iron.

  The carbon component is not limited as long as it is a carbonaceous material. Examples include activated carbon (coconut shell charcoal, charcoal powder, calendar bituminous coal, peat, lignite), carbon black, acetylene black, graphite, carbon nanotube, carbon nanohorn, and the like. Moreover, the thing of fibrous forms, such as activated carbon fiber, can also be used.

  The reaction accelerator is not limited as long as it can accelerate the exothermic reaction. Examples include inorganic electrolytes such as sodium chloride, potassium chloride, and calcium chloride. The electrolyte currently used for the well-known disposable warmer and a heat generating body can also be used. These reaction accelerators are not subject to the particle size.

The water-absorbing polymer is not particularly limited as long as it has a crosslinked structure and has a water absorption ratio of 3 times or more with respect to its own weight. Moreover, what cross-linked the surface may be used. Conventionally known water-absorbing polymers and commercially available products can also be used.
Examples of the water-absorbing polymer include a crosslinked poly (meth) acrylic acid, a crosslinked poly (meth) acrylate, a crosslinked poly (meth) acrylate having a polyoxyalkylene group, and a poly N-vinylcarboxylic acid amide. Examples include a crosslinked body, a polyvinyl alcohol-based crosslinked body, and a poly (meth) acrylamide crosslinked body. These may be used alone or in combination of two or more.

  The molding aid, in combination with moisture, improves the strength of the water film, strengthens the aggregation between the composition material particles of the exothermic composition such as iron powder, improves the strength of the exothermic composition molded body, There is no limitation as long as the maintenance of this can be strengthened, but there are water-soluble polymers, hydrophilic polymers, inorganic compounds, and the like. Cellulose-based, starch-based, poly (meth) acrylic acid (salt, ester) -based, syrup-based, seaweed, plant mucilage, microbial mucilage, protein-based, polysaccharide-based, organic-based, inorganic-based, synthetic-based, Examples thereof include polymer molding aids and the like. Cellulose derivative-based molding aids such as carboxymethyl cellulose (CMC), sodium carboxymethyl cellulose, ethyl cellulose, hydroxymethyl cellulose, starch-based water absorbents such as dextrin, pregelatinized starch, and starch for processing, and polyacrylates such as sodium polyacrylate , Syrups such as corn syrup and mannit syrup, seaweed extracts such as carrageenan and agar, plant resin mucous substances such as gum arabic, tolanto gum, caraya gum, mucous substances produced by microorganisms such as xanthan gum, juylan gum, bull run, guard run, gelatin, Animal proteins such as albumin and casein, plant proteins such as soy protein and wheat protein, polysaccharide thickeners such as plant fruit mucous substances such as pectin and arapinogalactan, guar gum, locust peanut gum, tamarind Plant seed mucous substances such as gum, tara gum, alginates such as sodium alginate, gum arabic, tragacanth gum, locust pea gum, guar gum, gum arabic, pectin, corn starch, etc., bentonite, montmorillonite, kaolin, sodium silicate, aluminum silicate Inorganic materials such as stearates, polyethylene oxide, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate emulsion, acrylic sulfonic acid polymer materials, poly-N-vinylacetamide, or methylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose, methylcellulose , Maleic anhydride copolymers such as carmellose sodium, carboxyvinyl polymer, ethylene-maleic anhydride copolymer, acrylic Acid - starch copolymer, microcrystalline cellulose, N- vinyl acetamide copolymer alone, or two or more combinations, and the like as an example. Conventionally known water-soluble polymers and thickeners can also be used.

  The content of the molding aid is not limited as long as the heat generation performance is not significantly reduced, but is preferably 0.001 to 2 parts by weight, more preferably 0.001 to 100 parts by weight with respect to 100 parts by weight of the iron powder. 1.5 parts by weight, more preferably 0.001 to 1 part by weight, still more preferably 0.01 to 1 part by weight, still more preferably 0.01 to 0.5 part by weight, Preferably it is 0.01-0.2 weight part, More preferably, it is 0.01-0.1 weight part, More preferably, it is 0.01-0.099 weight part, More preferably, it is 0.01 It is -0.095 weight part, More preferably, it is 0.02-0.095 weight part, More preferably, it is 0.05-0.090 weight part.

The functional substance may be any substance as long as it has some function such as medicinal effect and aroma. Perfumes, herbs, herbs, Chinese medicines such as kakkonto, oils such as safflower oil, dried plants such as mugwort and loquat leaves and mogusa, transdermal drugs, pharmaceutically active substances, fragrances, lotions, emulsions, Examples include poultices, fungicides, antibacterial agents, bactericides, deodorants or deodorizers, magnetic materials, and the like.
Furthermore, specific examples of functional substances include catechins, acidic mucopolysaccharides, chamomiles, horse chestnuts, vitamin E, nicotinic acid derivatives, blood circulation promoters such as alkaloid compounds; , Vitamin P, Kinsenka, Silanol, Terminaria, Mayus, etc., swelling improver; aminophylline, tea extract, caffeine, xanthene derivative, inosit, dextran sulfate derivative, horse chestnut, escin, anthocyanidin, organic iodine compound, hypericum grass, horsetail , Slimming agents such as mannenrou, ginseng, hyanoreuronidase; analgesics such as indomethacin, camphor, ketoprofen, shoga extract, pepper extract, methyl salicylate, glycol salicylate; Fragrances such as dander, rosemary, citron, genipor, menthol, nutmeg, turpentine oil, cedar embryo oil, hinokitiol oil, peppermint, eucalyptus, rosewood, orange, and moisturizers such as hyaluronic acid and glycerin. Can be used.

  The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable. For example, skin stimulants, analgesic anti-inflammatory agents such as salicylic acid and indomethacin, central nervous system agents (sleep sedatives, Antiepileptics, neuropsychiatric agents), diuretics, antihypertensives, lotus vasodilators, antitussives, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, local anesthetics, and the like. These drugs are used alone or in combination of two or more as required.

The packaging material constituting the base material, covering material, covering material, local ventilation material and support of the present invention is not limited as long as it functions as a packaging material for a heating element. The packaging material may have a single-layer structure or a multilayer structure, and the structure is not limited.
Breathable packaging materials, non-breathable packaging materials, breathable packaging materials, non-breathable packaging materials, water-absorbing packaging materials, non-water-absorbing packaging materials, stretchable packaging materials, elastic packaging materials, polyurethane foam, polystyrene foam, etc. Examples thereof include a foam packaging material, a heat-sealable packaging material having a heat seal layer, and the like, and can be appropriately used depending on a desired application in a desired form of a film, a sheet, a nonwoven fabric, a woven fabric, and the like and a composite thereof. Examples thereof include films, nonwoven fabrics, woven fabrics, sheets and the like, or combinations thereof. Specific examples include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, polyurethanes, polystyrenes, thermoplastic resins and synthetic resins such as polyethylene-vinyl acetate copolymers, papers, natural rubber, recycled rubber, synthetic rubber, Examples include films, sheets, nonwoven fabrics, woven fabrics, foams, non-water-absorbing papers that have been non-water-absorbing treated with wax, oil, etc., and composites thereof made of elastomers, stretchable shape memory polymers, and the like. . Any packaging material disclosed or commercially available or used for known disposable warmers or heating elements can be appropriately selected and used.

The surface that comes into contact with the skin including the substrate, coating material, and support of the present invention preferably has a good texture and is made of a flexible material.
Materials constituting the surface include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, polyurethanes, polystyrenes, polyethylene-vinyl acetate copolymers, synthetic resins such as polyethylene terephthalate, plant fibers such as cotton and hemp, wool, silk Examples include animal fibers such as rayon, recycled fiber such as rayon and cupra, non-woven fabrics and fibers using semi-synthetic fibers such as acetate, textile materials such as Japanese paper, western paper, synthetic paper, cloth, woolen fabric, leather materials, etc. . These can be used alone or in a stack of a plurality. Further, after enclosing the exothermic composition molded body with the base material and the covering material, the second base material and the second covering material having a good texture may be further coated thereon.

Of the heating elements of the present invention, it is preferable to provide a texture material for the heating elements that value the texture. The same applies to the exothermic precursor. An example is an eye temperature heating element, a face temperature heating element, or the like. It is preferable to provide at least the side in contact with the skin or the like. A flexible material may be used for the base material, the covering material, and the support body.
The feel material of the present invention is not limited as long as the feel is good, and the transparency and breathability are not questioned. In consideration of 1) good texture, 2) high strength, 3) prevention of powder leakage from the heat generating part, etc., it may be appropriately selected from various packaging materials according to the application.
The texture material of the present invention may be incorporated into a base material or a coating material. Non-woven fabric such as thermal bond non-woven fabric (texture), air-through non-woven fabric (texture) / two-layer laminate of polyethylene porous film, spunbond non-woven fabric (strength) / melt-blown non-woven fabric (venting and leak prevention) / thermal bond non-woven fabric (texture) Examples include various nonwoven fabrics such as a nonwoven fabric laminate such as a three-layer laminate.
When air permeability and moisture permeability are controlled in the base material and the covering material, it is preferable that the air permeability and moisture permeability of the texture material are high. For example, moisture permeability, a texture material or the like in excess of ^{5000g / (m 2 · 24hr)} .
The air-through nonwoven fabric is made of a core-sheath type composite fiber having polyethylene terephthalate as a core and polyethylene as a sheath.
The thermal bond nonwoven fabric is made of a core-sheath type composite fiber having polyethylene terephthalate as a core and polyethylene as a sheath.
The melt blown nonwoven fabric and the spunbonded nonwoven fabric are made from polypropylene.

Usually, the base material is composed of a non-breathable packaging material, and the covering material is composed of a breathable packaging material. The packaging material to be put on the body is a covering material, and it does not matter whether there is air permeability.
As the heating element, it is sufficient that at least a part of the heating precursor has air permeability. The air permeability of the container constituting the heating element can be obtained by using a breathable packaging material on one or both sides of the container.

The layer structure of the substrate and the covering material is not limited, but preferably has a single layer structure to a four layer structure.
The base material is a single layer structure such as a nonwoven fabric, a breathable film, a non-breathable film, a two-layer structure of a nonwoven fabric / porous film, a two-layer structure of a non-breathable film / nonwoven fabric, a non-breathable film / adhesive layer Examples include / three-layer structure of separator, non-breathable film / nonwoven fabric / adhesive layer / separator four-layer structure, and separator / breathable pressure-sensitive adhesive layer / nonwoven fabric / porous film four-layer structure.
The covering material is a single layer structure such as a nonwoven fabric, a breathable film, a non-breathable film, a two-layer structure of a nonwoven fabric / porous film, a two-layer structure of a nonwoven fabric / perforated film, a separator / breathable adhesive layer / nonwoven fabric / porous. An example is a four-layer structure of a quality film.
In the present invention, the base material is a packaging material on which the exothermic composition molded body is laminated, and the coating material is a packaging material that covers the exothermic composition molded body. In the base material or the covering material, air permeability and non-air permeability can be arbitrarily selected.

The air permeability of the air-permeable packaging material, the heat generating portion, and the segmented heat generating portion is a water vapor transmission rate according to the Lissy method (JIS K-7129A method), preferably 50 to 10,000 g / (m ² · day), more preferably ^{100~5,000g / (m 2 · day)} , still more preferably ^{100~2,000g / (m 2 · day)} , more preferably 100~1,000g ^/ (m 2 · day More preferably, it is 100-600 g / (m < ² > * day), More preferably, it is 150-500 g / (m < ² > * day). If the moisture permeability is less than 50 g / (m ² · day), the amount of heat generation is reduced, and a sufficient heating effect cannot be obtained. Exceeding ² · day) is not preferable because the heat generation temperature becomes high and there is a risk of causing a safety problem. However, depending on the application, it is not limited to use at a moisture permeability exceeding 10,000 g / (m ² · day) or depending on the case, close to an open system.

The non-breathable packaging material is not limited as long as it is a non-breathable packaging material, but the moisture permeability is preferably 10 g / (m ² · day) or less, more preferably 0.1 to 10 g. / a ^(m 2 · day), more preferably from ^{0.1~6g / (m 2 · day)} .

The breathable packaging material is not limited as long as it has breathability.
For example, perforated films, nonwoven fabrics, woven fabrics, papers and laminates containing them, and polyethylene for nonwoven fabrics by providing fine holes by perforating needles etc. in non-breathable films such as porous films and polyethylene films. Non-breathable packaging material laminated with a film that has fine holes using needles, etc. to give breathability, non-woven fabric, porous film in which fibers are laminated and thermocompression-bonded to control breathability Alternatively, a film or sheet such as a laminate in which a nonwoven fabric is laminated on a porous film via a breathable pressure-sensitive adhesive layer or a breathable adhesive layer is an example. The air-permeable packaging material may be only one layer, but by using a plurality of layers, it is possible to provide effects such as concealing the color of the heating element and preventing the falling powder from precipitating on the surface.

  The porous film is not limited, but is a polyolefin resin such as polyethylene, linear low-density polyethylene or polypropylene, a fluorine resin such as polytetrafluoroethylene, and an inorganic material such as calcium sulfate, barium sulfate, or titanium oxide. A porous film provided with micropores by interfacial peeling of a mixed sheet with a filler can be selected as appropriate.

  Examples of the nonwoven fabric include, but are not limited to, thermoplastic resins such as rayon, nylon (polyamide), polyester, acrylic, polypropylene, vinylon, polyethylene, polyurethane, and cupra, cotton, cellulose, synthetic pulp, wood pulp, non-wood pulp, Examples include semi-synthetic fibers such as rayon and acetate, dry nonwoven fabrics, wet nonwoven fabrics, spunbonds and spunlaces formed from vinylon fibers and polyester fibers. The nonwoven fabric which consists of composite fiber of a core sheath structure may be sufficient. The nonwoven fabric on the surface in contact with the skin is preferably a brushed (fluffed) nonwoven fabric or a laminate of nonwoven fabrics. Moreover, a stretchable nonwoven fabric and a non-stretchable nonwoven fabric can also be used.

  The non-breathable packaging material is not limited as long as it is non-breathable. Polyethylene, polypropylene, nylon, vinyl chloride, vinylidene chloride, acrylic, polyester, polyvinyl alcohol, ethylene-vinyl acetate copolymer and other films, sheets, coatings and laminates thereof, and metals such as aluminum Examples thereof include a laminate of metal (including semiconductor) compounds such as silicon oxide and a composite packaging material using them. Examples of the metal compound containing a semiconductor include silicon oxide layers, oxides such as aluminum oxide, silicon oxynitride, and silicon nitride, nitrides, and oxynitrides.

The core material is not limited as long as it functions as a core material, but a film or sheet made of a polymer such as polyethylene, polypropylene, nylon, acrylic, polyester, polyvinyl alcohol, ethylene-vinyl acetate copolymer, crepe paper, craft Examples include thin papers such as corrugated paper, corrugated liner paper, corrugated cores, paper such as thick paper such as coat poles, rubbers, or one or more laminates thereof, and composite materials using these.
The installation method is not limited and may be used alone, but rubber that serves as a non-slip layer and a core material may be used, or the same material as that of the base material or the covering material may be used. In addition, what is necessary is just to select rigidity suitably with the site | part of the applied foot.

  The paper is not particularly limited as long as it is water-absorbing paper. For example, tissue paper, crepe paper, thin paper such as craft, liner paper, cardboard core, thick paper such as a coat pole, or 1 type, or 2 or more types of these laminated bodies are mentioned. It can be used if it is not in direct contact with the hydrous exothermic composition.

Examples of the stretchable packaging material include films, sheets, nonwoven fabrics, woven fabrics, and laminates thereof that extend 1.005 times or more of the original length without being damaged when tension is applied. It does not matter whether this tension is removed or not. Extensibility also includes stretchability. Textiles, films, sheets, spandex yarns, yarns composed of natural rubber, synthetic rubber, elastomers, stretchable shape memory polymers, etc., blends of these with non-stretch materials, blended products and combinations thereof Strings, flat plates, strands, ribbons, tapes, slit films, scrim structure elastic bodies, foams, non-woven fabrics, or composite stretchable materials by laminating these or non-extensible or non-stretchable materials, etc. Is given as an example. A packaging material provided with staggered cuts is also an example of an elastic packaging material.

  Moreover, the said packaging materials, such as an extensible packaging material and a stretchable packaging material, are described as a packaging material which comprises the band of Unexamined-Japanese-Patent No. 2002-54012, and this specification is referred by referring all the said gazettes. Incorporate

  The heat seal material constituting the heat seal layer may be a single material or a composite material having a heat seal layer, and is not limited as long as at least a part thereof can be joined by heating. For example, polyolefins such as polyethylene and polypropylene, and olefin copolymer resins, ethylene-vinyl acetate copolymer resins, ethylene hot-melt resins such as ethylene-acrylic acid ester copolymer resins such as ethylene-isobutyl acrylate copolymer resins, Examples thereof include thermoplastic resins such as polyamide hot melt resins, butyral hot melt resins, and polyester hot melt resins, and films and sheets thereof. Moreover, what mix | blended various additives, such as antioxidant, can also be used for hot-melt-type resin and its film and sheet | seat. In particular, low density polyethylene and polyethylene using a metallocene catalyst are useful.

  In the present invention, an adhesive (temporary bonding layer) is used before heat-sealing the substrate and the covering material, and preferably a breathable adhesive layer (temporary bonding layer) made of an adhesive is used. And the covering material may be temporarily attached to form a temporary attachment portion, followed by heat sealing. The heat seal part has at least a part of an area composed of an adhesive and a heat seal material constituting the temporary attachment part. There is no wrinkle, no seal breakage, and reliable heat sealing can be achieved. Thereby, the speed of heat sealing can be increased.

  The breathable packaging material can be used on a part, one side or both sides of the heating element.

  With the local ventilation material of the present invention, by utilizing the difference in height between the segmented heat generating part and the segmented part, the heat generating part is covered with a local ventilation material, so that at least a part of the peripheral part of the segmented heat generating part has a space. The packaging material is formed and provided with an air pocket at least at a part of the peripheral edge of the divided heat generating portion. By providing the air reservoir between the divided heat generating portions, the air permeability between the outside and the divided heat generating portions is adjusted, and a heat retaining effect is also provided. In addition, it is a heat source on the support, covers the heat generating part with a difference in height, and adjusts the air permeability of the divided heat generating part, using the scattered heat source in the practical range Surface heat generation can also be realized. Non-breathable packaging material and breathable packaging material can be used for the local ventilation material. The local ventilation material and the support can be the packaging material used for the base material and the covering material, and have been conventionally disclosed or commercially available or used for known disposable warmers and heating elements. Any packaging material can be appropriately selected and used.

  The method for fixing the local ventilation material to the heat generating part and / or the heating element, the fixing agent such as an adhesive, the shape, and the state are not limited as long as an air pocket can be provided between at least some of the divided heat generating parts. .

The local ventilation material is not limited as long as the ventilation of the heat generating part can be adjusted. It is preferably lower than the air permeability of the heat generating portion provided with the local air-permeable material and the air generating surface of the heat generating precursor.
Breathable materials such as porous films, non-woven fabrics, films and sheets having holes by perforation, and composites such as laminates including at least one of them as part of constituent members, non-breathable films, sheets and laminates containing them Useful is a perforated film, a perforated film, perforated sheets or perforated laminates containing them. In addition, a local area of the local ventilation material is provided with a region (ventilation hole) having a larger air permeability than the ventilation surface (ventilation hole) of the heating element body in the local region of the local ventilation material to increase the local breathability, The region may be substantially non-breathable, or may be kept less breathable than the breathability of the vent surface of the segmented heat generating portion to control the flow path and flow of gas such as air. Thereby, the heat insulation of a division | segmentation heat-emitting part and appropriate temperature maintenance can be performed.

The packaging material constituting the local ventilation material is a base material, a coating material, a packaging material used for an outer bag, a heating element or a chemical warmer (breathable container (inner bag)) conventionally used. Or a packaging material used for a non-breathable container (outer bag) can be used and may be selected as appropriate. For example, as a non-breathable material, polyethylene, polypropylene, vinyl chloride, vinylidene chloride, polyester such as polyethylene terephthalate, films of various plastic materials such as nylon, KOP (vinylidene chloride coated biaxially oriented polypropylene film), etc. Vinylidene coat) film, vapor-deposited film (silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, silicon oxynitride and other metal compounds such as oxygen and nitrogen, or metal such as aluminum), non-woven fabric and various films As an example, a single layer such as a laminate or a laminated film or sheet containing these may be mentioned.
Furthermore, PE / adhesive, PP / adhesive, PET / adhesive, PE / nonwoven fabric / breathable adhesive PE / nonwoven fabric / PE / adhesive, PE / PET / M / PE / nonwoven fabric / breathable adhesive, PE / Heat seal material, PE / non-woven fabric / heat seal material, PE / non-woven fabric / PE / heat seal material, PE / PET / M / PE / non-woven fabric / heat seal material, non-woven fabric / adhesive (adhesive), laminate of non-woven fabric / An adhesive (adhesive) etc. are mentioned as an example.
Here, PE is a polyethylene film, PET is a polyethylene terephthalate film, M is a metal such as aluminum or silver, or a semiconductor such as silicon oxide, silicon oxynitride, silicon nitride, or aluminum oxide, or an oxide of metal, oxynitride, or nitride. It is a metal compound which shows. A foil, a vapor deposition thin film, etc. are mentioned as an example. As a local ventilation material, the laminated body of a nonwoven fabric and a film is mentioned as a preferable example.

  The ventilation blocking sheet covers at least the breathable portion of the local ventilation material, and is not particularly limited as long as it is non-breathable. The outer bag packaging material, the local ventilation material packaging material, or the disclosed or publicly known Non-breathable packaging materials such as non-breathable films and sheets used for chemical warmers and heating elements can be used. The film or sheet is adhered and bonded to the container in a peelable state by means such as an adhesive, but it is preferable to provide a handle (knob portion) so that it can be easily peeled off during use.

In this way, the ventilation block sheet is detachably bonded to the ventilation surface of the breathable local ventilation material, so that air (oxygen) enters the inside of the divided heat generating portion from the ventilation surface during storage and transportation. This prevents heat generation during storage and transportation.
On the other hand, since air permeability can be ensured by peeling the ventilation block sheet from the local ventilation material during use, heat can be generated by normal use. Therefore, it becomes possible to ship without individually packaging each heating element as in the past, and several heating elements can be packaged together in one packaging bag, so-called outer bags can be omitted. . In other words, even if one of them is used when packaged together, it can be stored as if each heating element was individually packaged, and without being concerned about its storage condition such as sealing after opening. Can be used.

The heat generating element according to the present invention has a plurality of heat generating sections and a section, and has flexibility including a structural flexible function and an articulated flexible function, and fits the body by the flexibility of the heat generating element itself. It is a heating element.
On the other hand, the flexibility of the container for the heat generating composition is notable due to the type and thickness of the sealing layer made of a material film made of a polyethylene film or a porous film constituting the base material or the covering material, or a heat sealing material. It is very different and greatly affects the flexibility of the heating element. Increase the weight of the heat generating composition of the heat generating composition only by combining the structure of the heat generating composition containing the heat generating composition and the section not containing the heat generating composition, or increase the weight of the heat generating composition of the heat generating composition to a specific value or less. Only by making it, the heat generating body which has a good touch and is excellent in flexibility and wearability cannot be obtained.
By limiting the loop stiffness of the storage body to 700 mN / cm or less, the flexibility of the storage body itself is accurately ensured, and the division part corresponding to the joint of the human body without increasing the weight of the heat generation composition of the division heat generation part The heating element is soft and has excellent flexibility, and the flexibility of the heating element does not change or increases before and after heating, that is, before use, during use, and after use. The exothermic body is less likely to be peeled off, and a heating element excellent in wearability and adhesion can be provided.
Furthermore, by limiting the loop stiffness of at least one section of the section to 700 mN / cm or less, the section can be given good flexibility and a good hinge function can be obtained.
Furthermore, the maximum tensile strength at 25 ° C. of at least one of the sections is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more. The section maintains the shape as the sectioning section, supports the section heating section reliably while maintaining the space between the section heating sections, functions as a pleasant hinge, and bends more preferentially than the section heating section containing the exothermic composition.
Furthermore, when the minimum bending resistance of the heating element is 70 mm or less, the difference in minimum bending resistance is 0 or less and / or the change in minimum bending resistance is −95 to 0, the unevenness is gentle and uncomfortable. The section corresponding to this is soft and flexible, and a flexible heating element can be secured.
Further, the loop stiffness of the storage body after the end of heat generation and the loop stiffness of at least one section after the end of heat generation are set to 700 mN / cm or less, or the loop of the storage body before and after the heat generation ends. By making the stiffness and the loop stiffness of at least one section of the storage body approximately equal or not changing, the flexibility does not change before and after the heat generation, that is, before use, during use, after use. A heating element can be secured.
As a result, the heat generating element converted from the heat generating precursor has excellent heat generation characteristics, good conformity along the shape of the heated body such as the body or object, the flexibility of the heat generating element does not change, and is attached It is possible to provide a heating element that is less likely to be peeled off from the part and has excellent mounting properties and adhesion.

The loop stiffness of the storage body according to the present invention generates heat in a direction that passes through the section heating section area and the section of the storage body in which the section heating section area that is a non-sealing area and the section section that is a sealing area are mixed and substantially orthogonal to each other. The loop stiffness of at least one sample out of a plurality of samples of the storage body cut in the longitudinal direction of the region including the seal portion at the periphery of the body may be 700 mN / cm or less.
The loop stiffness of the segmented portion of the present invention may be such that when there are a plurality of segmented portions, the loop stiffness of at least one sample out of the plurality of sampled segmented portions is 700 mN / cm or less.
As the loop stiffness of the container of the present invention and the loop stiffness of the section according to the present invention, values measured at room temperature, preferably at 25 ° C. are adopted.
The maximum tensile strength of the section at 25 ° C. of the present invention is such that, when there are a plurality of sections, the maximum tensile strength of at least one sample of the plurality of sections cut out is 20 g / mm width or more. If it is.
The breaking elongation of the section at 25 ° C. of the present invention should be 5% or more if the breaking elongation of at least one sample among the plurality of samples of the section is cut out when there are a plurality of sections. .

  The “classified heat generating portion” of the present invention is a region in the heat generating element that contains a heat generating composition (excess water-containing heat generating composition, water-containing heat generating composition, heat generating composition molded body, etc.).

  The “dividing part” of the present invention is a central part other than the peripheral part of the divided heating part heating element, and is a non-housing area for the heat generating composition, a sealing area, a connecting part, a hinge (bending area) ). Examples of the seal area include a heat seal area, an adhesive (pressure-sensitive) seal area, and an adhesive seal area. A heat seal region (heat seal portion) is particularly preferable.

  The “plurality of divided heat generating portions” of the present invention means two or more, preferably three or more, more preferably four or more divided heat generating portions. The same applies to the divided heat generating area. The “plurality of sections” in the present invention means two or more, preferably three or more, more preferably four or more sections.

  The section heat generating section has a convex shape at least on one side with a section section as a boundary, and is composed of a top and a side section.

  The structural flexible function is a function that imparts flexibility resulting from a structure in which the heating element has a region that is difficult to bend and a region that is easily bent. That is, it is a function of holding the entire heating element flexibly. Specifically, it is a heating element composed of a segment heating part having a hydrous heat generating composition in a region that is difficult to bend, and a segmenting part that is a sealed region without a hydrous heat generating composition in a region that is easily bent. . By defining the loop stiffness of the housing constituting the heating element to a predetermined value, the flexibility and feel of the entire heating element are realized.

  The articulating flexible function is a function that gives flexibility to a section corresponding to the joint of the heating element, and the section can be smoothly bent. In other words, it is a hinge function that operates with a weak force. By reducing the loop stiffness of the storage body or the like, the section of the section heating section heating element can be bent, and practical flexibility can be secured.

  By combining the structural flexible function and the articulating flexible function, the function that the section can be smoothly bent before, during, and after the heat generation was secured.

The loop stiffness of the storage unit for a heating element according to the present invention is an index indicating the flexibility of the heating element, and is an index expressed numerically by taking into account both the flexibility and the non-repulsive property of the storage body. Thereby, the flexibility of the heating element, in particular, the flexibility of the divided heating part heating element composed of a plurality of divided heating parts and the dividing part and the similar heating element can be accurately expressed numerically. In addition, when the heating element is placed along a body to be heated, the heating element can be easily placed along the heating body regardless of the weight of the heating composition of the heating element. It is an index for realizing a non-repulsive heating element that does not return to its original state due to repulsive force.
If the loop stiffness of the storage body is increased, the repulsive force is increased, the flexibility of the storage body is lost, the heating element is stiffened, the flexibility is lost, and the touch is not good.
The loop stiffness of the storage unit for a heating element according to the section can define both flexibility and resilience, but the minimum bending resistance cannot define resilience due to bending even if the flexibility can be defined.
Originally, when displaying the flexibility of a heating element, the flexibility can be displayed only when both flexibility and non-repulsiveness can be displayed.
The heating element having the housing body defined by the loop stiffness of the present invention has flexibility of the heating element, in particular, the flexibility of the divided heating part heating element composed of a plurality of divided heating parts and the dividing part and its similar heating element. A heating element having a good touch and flexibility that enables accurate numerical expression is realized and can be provided.
Although there is no restriction | limiting in the adjustment method of the loop stiffness of the storage body of this invention, It is preferable to adjust with the sealing material, such as a packaging material and a heat seal layer, an adhesive layer, and the width | variety and number of a division part.

The loop stiffness of the section of the present invention is an index expressed numerically by taking into account both the flexibility and the non-repulsive property of the section, which is the bent region that is the hinge of the section heating element heating element.
When the loop stiffness of the section is increased, the repulsive force is increased, the flexibility of the section is lost, the heating element is stiffened, the flexibility is lost, and the touch is not good.
The loop stiffness of the section is independent from the loop stiffness of the storage body, but when combined, the section heat generator group (the section heat generator and its similar heat generation is flexible and comfortable to touch. To say the body).

  The loop stiffness of the storage body after the end of heat generation according to the present invention is the end of use when the obtained segment heating part heating element is heated in a normal atmosphere and the temperature of the segment heating part heating element falls below 37 ° C. Assuming that, after the end of the exothermic reaction, the end of the section heating section of the heating element is opened, the heating composition is taken out, and the section heating section area and the sealing section that are the non-sealing section of the container that is the remaining packaging material It is the loop stiffness of the section of the storage body cut in the longitudinal direction of the region including the seal portion at the periphery of the segment heating element heating element in a direction passing through the segmenting section almost orthogonally. This is an index of the flexibility of the storage body after the end of heat generation.

The maximum tensile strength and elongation at break of the section of the present invention are physical properties for maintaining toughness and flexibility for maintaining the structure of the heating element.
Since the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more and the elongation at break at 25 ° C. is 5% or more, the section that is a sealed connecting section is used as the section. While maintaining the shape and maintaining the space between the divided heat generating portions, the divided heat generating portions are reliably supported, function as a hinge, and bend preferentially over the divided heat generating portions containing the heat generating composition.

  The storage body for a heating element according to the present invention uses a base material and a covering material that are formed of a substantially flat packaging material, and contains a region containing an excess water heating composition and a hinge (bending region). ), And at least a part of one surface of the storage body has air permeability. A packaging material having a layer or region composed of an adhesive, an adhesive, a heat seal material, etc. is treated as a single packaging material, and a packaging material such as a texture material, a laying material, a cushioning material, etc. When not fixed, the packaging material is removed, and mechanical properties such as loop stiffness are measured.

  The loop stiffness of the container before heat generation according to the present invention is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.01 to 500 mN. / Cm, more preferably 0.01 to 400 mN / cm, still more preferably 0.01 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm, and still more preferably 0.1. To 250 mN / cm, more preferably 0.1 to 200 mN / cm, more preferably 0.5 to 200 mN / cm, still more preferably 1 to 200 mN / cm, and still more preferably 5 to 200 mN. / Cm, more preferably 10 to 200 mN / cm. When it exceeds 900 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The loop stiffness of at least one section before heat generation according to the present invention is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.8. It is 01-500 mN / cm, More preferably, it is 0.01-400 mN / cm, More preferably, it is 0.01-300 mN / cm, More preferably, it is 0.1-300 mN / cm, More preferably It is 0.1-250 mN / cm, More preferably, it is 0.1-200 mN / cm, More preferably, it is 0.5-200 mN / cm, More preferably, it is 1-200 mN / cm, More preferably It is 5-200 mN / cm, More preferably, it is 10-200 mN / cm. When it exceeds 900 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The maximum tensile strength at 25 ° C. of at least one section of the present invention is 20 g / mm width or more, preferably 20 to 2000 g / mm width, more preferably 20 to 1000 g / mm width, Preferably it is 20-800 g / mm width, More preferably, it is 20-700 g / mm width, More preferably, it is 20-600 g / mm width, More preferably, it is 20-500 g / mm width, More preferably It is 20-400 g / mm width, More preferably, it is 20-300 g / mm width, More preferably, it is 20-200 g / mm width.

  The breaking elongation at 25 ° C. of at least one section of the present invention is 5% or more, preferably 5 to 900%, more preferably 5 to 800%, and further preferably 5 to 700%. More preferably 5 to 600%, still more preferably 5 to 500%, still more preferably 5 to 400%, still more preferably 5 to 300%, still more preferably 5 to 200%. Yes, more preferably 10 to 200%, still more preferably 15 to 200%.

  At least one of the maximum tensile strength of the section, the breaking elongation of the section and the loop stiffness of the section is preferably 0.3 to 1.7 times the average value of the physical properties of the sections. More preferably, it is 0.4-1.6 times, More preferably, it is 0.5-1.5 times, More preferably, it is 0.6-1.4 times, More preferably, it is 0.7- 1.3 times.

  The minimum bending resistance of the segmented heating element is preferably 70 mm or less, more preferably 1 to 70 mm, still more preferably 5 to 70 mm, still more preferably 5 to 60 mm, still more preferably 5 to 5 mm. It is 50 mm, More preferably, it is 10-50 mm, More preferably, it is 10-40 mm, More preferably, it is 10-30 mm. Thereby, a favorable touch is obtained at the time of contact with the body or use.

  The thickness of the heating element is not limited as long as it can be used as a flexible heating element, but is preferably 0.05 to 15 mm, more preferably 0.05 to 10 mm, and still more preferably 0.1 to 10 mm. More preferably, it is 0.1-9 mm, More preferably, it is 0.3-9 mm, More preferably, it is 0.3-8 mm, More preferably, it is 0.3-7 mm, More preferably It is 0.5-7 mm, More preferably, it is 0.5-6 mm, More preferably, it is 0.5-5 mm.

  The single heating part heating element of the present invention is a heating element in which the heating part is formed of one heating part, and at least a part of the heating element has air permeability. The shape of the heat generating part and the heat generating element is not limited, and the shape of the heat generating element and the shape of the heat generating part are not necessarily the same. Further, the heating element and / or the heating part may be provided with corners in a substantially arc shape (R shape), and the corners may be curved or curved. Examples of the heating element include a rectangular heating element, a warm pad heating element, and a foot temperature heating element.

  The rectangular heating element of the present invention is a heating element having a rectangular heating element and heating element. Rectangular and square shapes are examples.

  The hot-spring heating element of the present invention is a small heating element having various shapes such as a circle, a rectangle, and an ellipse and having a size of 50 mm or less x 50 mm or less. Suitable for heating the body's vases.

The foot temperature heating element of the present invention includes a foot temperature heating element consisting of a single heating part heating element and a foot temperature heating element consisting of a segment heating part heating element, and the heat generated in a shape covering any part of the foot Any body is acceptable. For example, a shape that covers a part of the back side of the foot, a shape that covers the entire back side of the foot (full foot shape), a shape that covers a part of the back side of the foot, a shape that covers the entire back side of the foot, A shape that covers part or all of the instep and part or all of the side of the foot, or part or all of the back of the foot, part or all of the side of the foot, and the back of the foot An example of the heating element is a shape that covers a part or all of the heating element. Moreover, a recessed part etc. may exist in the center part etc. of a heat generating body.
The minimum bending resistance of the full-foot-shaped foot temperature heating element having no intermittent notches of the present invention is 200 mm or more, preferably 230 mm or more, more preferably 250 mm or more, and further preferably 270 mm or more. More preferably 300 mm or more, further preferably 350 mm or more, further preferably 400 mm or more, further preferably 500 mm or more, and further preferably 600 mm or more.

As described above, the segment heating element heating element of the present invention is as follows.
1) The surplus water value of the exothermic composition was set to 0 to secure a heating element that warms up quickly.
2) The loop stiffness of the storage body was set to 700 mN / cm or less to ensure the flexibility of the storage body, and to ensure the appropriate flexibility of the heating element.
3) Maximum tensile strength at 25 ° C. of at least one section is 20 g / mm width or more, and elongation at break at 25 ° C. is 5% or more, preferably maximum tensile strength at 25 ° C. of each section Is 30 g / mm width or more, and the elongation at break at 25 ° C. is 10% or more. Therefore, toughness for maintaining the structure of the heating element and extensibility for maintaining flexibility were ensured.
4) The loop stiffness of at least one section was set to 700 mN / cm or less to ensure the flexibility of the joint of the heating element.
5) The minimum bending resistance of the heating element is 70 mm or less, the difference in minimum bending resistance is 0 or less and / or the change in minimum bending resistance is -95 to 0, before use, during use, after use. A heating element with the same flexibility was secured.
6) The loop stiffness of the storage body after the end of heat generation is set to 700 mN / cm or less to ensure the flexibility of the storage body. From the start of heat generation to the end of heat generation, from the start of heat generation to the end of use, the flexibility of the heat generation body is moderate. Secured.
7) Provide intermittent cuts in some partial areas of the section, cover at least a part of each section heat generating part with a local ventilation material, adjust the ventilation to the exothermic composition, and keep warm. As a result, a heating element group with a broad base was formed.
8) By combining the structural flexible function and the articulating flexible function, the function that the section can be smoothly bent before, during, and after the heat generation was secured.

Furthermore, it is preferable that the segment heating part heating element of the present invention has at least one of the following items.
1) The loop stiffness of the container after the heat generation is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.01 to 500 mN. / Cm, more preferably 0.01 to 400 mN / cm, still more preferably 0.01 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm, and still more preferably 0.1. To 250 mN / cm, more preferably 0.1 to 200 mN / cm, more preferably 0.5 to 200 mN / cm, still more preferably 1 to 200 mN / cm, and still more preferably 5 to 200 mN. / Cm, more preferably 10 to 200 mN / cm. When it exceeds 900 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.
2) The loop stiffness of at least one section after the end of heat generation is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.8. It is 01-500 mN / cm, More preferably, it is 0.01-400 mN / cm, More preferably, it is 0.01-300 mN / cm, More preferably, it is 0.1-300 mN / cm, More preferably It is 0.1-250 mN / cm, More preferably, it is 0.1-200 mN / cm, More preferably, it is 0.5-200 mN / cm, More preferably, it is 1-200 mN / cm, More preferably It is 5-200 mN / cm, More preferably, it is 10-200 mN / cm. When it exceeds 900 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.
3) The difference between the loop stiffness of the storage body before the heat generation and the end of the heat generation, and the difference of the loop stiffness of the section before the heat generation and the end of the heat generation are preferably ± 500 mN / cm, more preferably ± 300 mN / cm. More preferably ± 100 mN / cm, still more preferably ± 80 mN / cm, still more preferably ± 50 mN / cm, still more preferably ± 20 mN / cm, still more preferably ± 10 mN / cm. Yes, more preferably ± 5 mN / cm, and even more preferably 0 mN / cm.
4) The maximum tensile strength at 25 ° C. of at least one section after the end of heat generation is preferably 20 g / mm width or more, more preferably 20 to 1,000 g / mm width, and still more preferably 20 -800 g / mm width, more preferably 20-700 g / mm width, still more preferably 20-600 g / mm width, still more preferably 20-500 g / mm width, still more preferably 20-400 g. / Mm width.
5) The elongation at break at 25 ° C. of at least one section of the storage body after the end of heat generation is preferably 5% or more, more preferably 5 to 200%, and still more preferably 10 to 200%. Yes, more preferably 15 to 200%.
6) At least one of the maximum tensile strength of the section after the end of heat generation and the elongation at break of the section is preferably 0.3 to 1.7 times the average value of the physical properties of each section. Preferably it is 0.4-1.6 times, More preferably, it is 0.5-1.5 times, More preferably, it is 0.6-1.4 times, More preferably, it is 0.7-1. 3 times.
7) The minimum bending resistance change of the heating element of the segmented heating part is −95 to 0, preferably −90 to 0, more preferably −90 to −0.01, and further preferably −80 to It is -0.01, More preferably, it is -70 to -0.01, More preferably, it is -60 to -0.01, More preferably, it is -50 to -0.01.
8) The minimum bending resistance difference of the segment heating element heating element is 0 or less, preferably −69 to 0, more preferably −60 to 0, still more preferably −50 to 0, and further Preferably it is -40-0, More preferably, it is -30-0, More preferably, it is -20-0, More preferably, it is -10-0, More preferably, it is -5-0.

The rigid and soft heating elements of the present invention have two or more, preferably three or more, more preferably four or more, and still more preferably five or more divided heat generating parts composed of a plurality of exothermic composition molded bodies and one or more. The heat generating element is a heat generating section having a heat generating section consisting of the following sections, the minimum bending resistance being 70 mm or less, the minimum bending resistance change being 0 or less, and preferably −95 to 0. It is preferable that the divided heat generating portion and the divided portion are configured in a stripe shape. Examples include a stripe heating element, a tunnel ventilation heating element, a heating element having intermittent cuts, and a drug heating element.
In a rigid and soft heating element having a structure in which there is a sealing part that does not contain a heat generating composition between the divided heat generating parts that contain a heat generating composition, the heat generating composition is slight as heat generation proceeds. The weight increases, and the rigid and soft heating elements are more likely to bend at the boundary of the hinges, and better adhere to the heated body. Therefore, the minimum bending resistance change is −95 to 0.
The minimum bending resistance of the bending / soft heating element is 70 mm or less, more preferably 1 to 70 mm, further preferably 5 to 70 mm, further preferably 5 to 60 mm, and further preferably 5 to 50 mm. More preferably, it is 10-50 mm, More preferably, it is 10-40 mm, More preferably, it is 10-30 mm. Thereby, a favorable touch is obtained at the time of contact with the body or use.
The minimum bending resistance change of the bending-soft heating element is −95 to 0, preferably −90 to 0, more preferably −90 to −0.01, and further preferably −80 to −0. 0.01, more preferably −70 to −0.01, still more preferably −60 to −0.01, and even more preferably −50 to −0.01.
The minimum bending resistance of the bending-soft heating element is preferably 100 or less, more preferably 1 to 100, still more preferably 1 to 80, still more preferably 1 to 50, still more preferably. It is 1-40, More preferably, it is 1-30, More preferably, it is 1-20.
The maximum bending resistance ratio of the bending-soft heating element is not limited, but is preferably 1.1 or more, more preferably 1.15 or more, still more preferably 1.2 or more, and still more preferably. It is 1.25 or more, More preferably, it is 2.0 or more, More preferably, it is 2.5 or more, More preferably, it is 3.0 or more.

  The stripe heating element of the present invention is a segment heating part heating element in which the segment heating parts are provided in a stripe shape.

  The separable heating element of the present invention is a segmented heating element heating element provided with perforated perforations in a region other than the segment heating part of the segment heating element heating element of the present invention. A segment heating part heating element having perforated perforations in at least one section is preferable.

  The expansion / contraction heating element of the present invention is a segment heating part heating element in which staggered cuts are provided in regions other than the segment heating part of the segment heating part heating element of the present invention. A segment heating part heating element having a staggered cut in a part of at least one section is preferable.

  The band heating element of the present invention is a segment heating element heating element having a long stretchable support. An example is one in which a segmented heat generating part or a segmented heat generating part heating element is fixed to a long stretchable support via an adhesive or the like. As the stretchable support, non-stretchable packaging materials provided with alternate cuts and stretchable packaging materials can be used, and the base material and covering material packaging materials can be used. In addition, the area of the support body other than the section heating section heating section (section heating section) is fixed to a support larger than the section heating section heating section (section heating section) via an adhesive, an adhesive, or a heat seal material. Fixing means such as an adhesive or a hook-and-loop fastener may be provided on at least a part of the band heating element. The fixing means is not limited, but a hook-and-loop fastener is preferable. In addition, the support is not limited as long as the heating element can be fixed, but examples of the support include a packaging material used for a base material and a covering material. When the support is non-breathable, it is fixed so that the non-breathable surface of the heating element faces the support surface. When the support is breathable, the heating element is fixed to the support by selecting as appropriate.

The tunnel ventilation heating element of the present invention is a heating element having a ventilation part composed of a local ventilation part leading to the outside, a wide area ventilation part leading to the heat generating composition, and a tunnel (space part) therebetween. It is preferable that the size of the ventilation holes is larger in the local ventilation portion than in the wide area ventilation portion, and the number of ventilation holes is larger in the wide area ventilation portion than in the local ventilation portion.
An example is a heating element in which at least a part of a heat generating part composed of a divided heat generating part and a divided part is covered with a local ventilation material, and a space part is formed by a side ventilation part, a divided part, and a local ventilation material of the divided heat generation part. As mentioned.
In a tunnel ventilation heating element based on a section heating section and a section section, the local ventilation material is fixed to at least a part of the top of one or more section heating sections through an adhesive layer made of an adhesive or an adhesive. There is a tunnel ventilation heating element that is not connected to the top of the section heating part.

  In the medicine heating element of the present invention, at least a part of the heat generating part composed of the divided heat generating part and the dividing part is covered with a local ventilation material having a vent hole, and the side ventilation part, the dividing part and the local ventilation of the divided heating part are provided. The heating element is a heating element in which a space is formed from the material, and the local ventilation material is fixed by a seal at least around the entire periphery of the heating element. A chemical heating element in which a local ventilation material is fixed to at least a part of the top of one or more segmental heating parts via an adhesive layer made of an adhesive or an adhesive, and a local ventilation material of the segmental heating part There is a drug heating element that is not fixed to the top. Usually, the ventilation holes of the local ventilation material are sealed with a ventilation blocking sheet. When the heating element is used, the ventilation blocking sheet is peeled off. Moreover, by using a non-breathable packaging material for the base material and the local ventilation material, the interaction between the heat generating composition and the exposed portion of the heat generating element can be prevented. Therefore, the interaction between the exothermic composition and the pressure-sensitive adhesive layer containing the functional substance can be prevented, and the respective functions can be maintained. In the conventional heating element, the interaction between the heating composition and the exposed portion of the heating element cannot be prevented, and both the heating composition and the pressure-sensitive adhesive layer containing the functional material are altered, and a drug heating element that can withstand practical use cannot be obtained. It was. It can be used as a normal heating element or patch without containing a functional substance.

  The separable tunnel ventilation heat generating body of the present invention has a perforation that can be cut into at least one or more of the fixed section portions, wherein the local ventilation material of the tunnel ventilation heat generating body is fixed to at least one or more section portions. Is provided.

  In the detachable drug heating element of the present invention, the local ventilation material of the drug heating element is fixed to at least one section, and a perforated line is provided in at least one of the fixed section. It is a thing.

 The tunnel ventilation heating element and the drug heating element having the local ventilation material with the ventilation blocking sheet do not generate heat until the ventilation blocking sheet is removed, and can be stored for a long time. Can be used. Since the packaging material of the outer bag can be omitted, the amount of garbage is reduced and it can contribute to environmental problems. It is useful to provide a fixing means on at least a part of the exposed portion of the tunnel ventilation heating element and the drug heating element including the local ventilation material.

Since the tunnel ventilation heating element and the drug heating element can adjust the ventilation through the space (tunnel), the maximum temperature is less than 42 ° C, preferably 41 ° C or less, more preferably 36 to 41 ° C, and still more preferably 36 to 41 ° C. Can be heated at 40 ° C for a long time. This creates a heating element that does not cause low temperature burns. Incidentally, it is said that low temperature burns occur when the skin temperature is raised to 42-44 ° C. for 6 hours or more. Since the heating element based on the segment heating part heating element has no bias in the heating composition from before the heat generation to after the end of the heat generation, it can be heated comfortably.
The tunnel ventilation heating element and the drug heating element are heating elements capable of finely adjusting the ventilation to the heat generating composition by local ventilation by a large ventilation hole, space, and wide ventilation by a small ventilation hole.

The face temperature heating element of the present invention is a heating element that can cover the face.
In particular, a face temperature heating element that heats the eyes and the vicinity thereof is referred to as an eye temperature heating element.
A face temperature heating element that heats the nose and its surroundings is referred to as a nasal temperature heating element.
1. The face temperature heating element includes 1) an integrated type in which the heating part and its support are integrated, and 2) an assembly type in which the heating part and its support are provided separately and integrated in use.
2. The integrated face temperature heating element can be used immediately and is convenient. Various types of products are provided by selecting the number, size, arrangement, etc. of the divided heat generating portions according to each application, from a wide range of heating to a specific region.
3. The assembly-type face temperature heating element is 1) an insertion type in which the heating element and the heating part are stored in the storage part of the support, and 2) fixing the heating element and the heating part to the support through fixing means such as an adhesive layer. There is a pasting formula. When heating only a specific area of the face, the facial temperature heating element can be used by inserting a minimal heating element into a support such as a mask or by attaching it to the support with a fixing means such as an adhesive. It is also useful. The minimal heating element is not limited, but is a minimal heating element having a single heating part, having two or more divided heating parts, and having a cutable portion (perforation, etc.) that can be cut off in the dividing part. An example is a segmented heat generating part separated from the heat generating element.
4). The shape of the face temperature heating element is not limited, but a rectangular shape, a mask shape, and an eye mask shape are examples.
5 It is preferable to provide a texture material on at least one of the face side of the face temperature heating element and the outer side which is the opposite side to improve the feeling.
6). The means for fixing the face temperature heating element to the face or the like is not limited, but examples include an ear strap, an ear strap, and an ear strap rubber.
7). The structure of the expansion / contraction heating element provided with alternate cuts and the face temperature expansion / contraction heating element having various expansion / contraction functions are preferable for tight fixation to the face or the like. As an example of the assembly type, a heating element in which a staggered cut is provided in a support such as a mask and a single heat generating part or a small single heat generating part is inserted or stuck between the staggered cuts is an example.
8). A functional substance or the like may be carried inside or outside the face temperature heating element to have a fragrance effect or a pharmacological effect. For example, an integral type or a push-in type using a sheet material coated with an aqueous pap base is cited.
9. In order to maintain an appropriate temperature of the face temperature heating element to the warmed body (contact temperature to the warmed body is 42 ° C. or lower, preferably 40 ° C. or lower, more preferably 36 to 40 ° C.) It is preferable to use a heating part or a heating element having a structure of a drug heating element provided with a local ventilation material for the face temperature heating element. Temperature buffer materials are also useful.
10. In the face temperature heating element, at least a part of the section heating part is breathable due to moisture permeability, and also has moisture permeability, so the skin side is moisture permeable and water vapor from the heating composition is released toward the skin. It is preferable to select a type that makes the skin side surface moisture-impermeable and does not release water vapor from the exothermic composition toward the skin.
11. For the eye temperature heating element and the nasal temperature heating element, the above 1. -10. The following items are applicable.
12 The nasal temperature heating element is preferably provided with one or more heating parts or small heating elements at positions corresponding to at least both sides of the nose. In the case of the assembly type, it is preferable that one or more heating parts or small heating elements are attached to the region of the container such as a mask.
13. As an example of the heating element, 1) the integrated type is an integrated face temperature heating element, the integrated eye temperature heating element, the integrated nose temperature heating element, and 2) the assembled type is an assembled type face temperature heating element, an assembled type eye temperature. Heating element, assembled nose temperature heating element, 3) insertion type is insertion type face temperature heating element, insertion type eye temperature heating element, insertion type nose temperature heating element, 4) pasting type is pasting type face temperature heating element Body, pasting type temperature heating element, pasting type nose temperature heating element, 5) face temperature expansion and contraction heating element, eye temperature expansion and contraction heating element, and nasal temperature stretching and heating element in each formula.
Also,
1) The container such as the mask of the present invention may be provided with a moisture holding body that releases water vapor separately from the heating element. As the moisture retainer, non-woven fabric, woven fabric, porous polymer impregnated with water, water-absorbing polymer water absorbed, or the like can be used.
2) The shape and material of the mask body are not limited as long as the heating element can be attached and either or both of the nose and mouth can be covered.

  The constituent material of the temperature buffer material of the present invention is not limited as long as the temperature from the heat generating part can be buffered, but (1) gauze, various woven fabrics, nonwoven fabrics, (2) papers such as paper and synthetic paper, (3) Porous film or porous sheet formed from plastic, natural rubber, recycled rubber or synthetic rubber, (4) Foamed plastic such as urethane foam having perforations, (5) A kind of metal foil such as aluminum having perforations Alternatively, a combination of a plurality of types can be given as an example. In addition, when controlling temperature using these temperature buffer materials, selection of the material, thickness, etc. of a temperature buffer material are selected suitably. What is necessary is just to select suitably also when making the water vapor | steam which generate | occur | produces from a heat generating body reach eyes or a face. The temperature buffer material can be used not only for eyes and face but also for other heating elements.

  An outer temporary folding folded heating element with an outer bag of the present invention is a heating element stored in a non-breathable storage body in a folded or wound state, and at least an exposed portion of the heating element body (heating element). A part of the bag may be temporarily attached to the inner surface of the outer bag, which is a non-breathable container (hereinafter referred to as outer temporary attachment). Outer temporary attachment means that the heating element main body and the outer bag which is a non-breathable container are in contact with each other at least partially via the re-peeling weak adhesive layer. Thereby, the movement of the heating element body on the packaging material can be prevented at least until the heating element body is folded together with the packaging material of the outer bag. Thereby, high-speed manufacture of a heating element is attained. There are no restrictions on the number, area, etc. of outer temporary wear. In the case of a heating element having a separator that protects fixing means such as an adhesive layer, the separator is also treated as a heating element.

  The heating element of the present invention may be enclosed in an outer bag or folded and enclosed in an outer bag without external temporary attachment.

The fixing means of the present invention is not limited as long as it has a fixing capability capable of fixing the heating element to a required portion. Furthermore, the fixing means is preferably removable. Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners such as Velcro (registered trademark), magnets, bands, strings, ear hooks, and combinations thereof, which are generally employed as the fixing means, are arbitrarily selected. Can be used for
In the case of a band, the adjustment fixing means may be further configured by a combination of a hook-and-loop fastener and an adhesive layer. There are no restrictions on the installation method, installation location, installation pattern, and the like of the fixing means, and it may be determined as appropriate. Moreover, you may provide a separator to a fixing means as protection until it is used. The separator may be provided with a notch such as a back split to facilitate the separation. Note that the fixing means of the present invention can be used by appropriately selecting fixing means (including attaching means that can be removed) that have been conventionally disclosed or commercially available, or that are used for known disposable warmers or heating elements.

The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive. The pressure-sensitive adhesive is not limited as long as the heating element can be fixed, and those conventionally used for chemical warmers, heating elements and poultices, and those technically disclosed can be used. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited as long as it has an adhesive force necessary for adhering to the skin and clothes, and is solvent-based, aqueous-based, emulsion-type, hot-melt-type, and reactive. Various forms such as a pressure-sensitive system, a non-hydrophilic adhesive, a mixed adhesive, a hydrophilic adhesive (gel, etc.) are used. Non-hydrophilic adhesive layers and hydrophilic adhesive layers are examples.
Moreover, as an adhesive layer, even if it has air permeability, it may not have air permeability. What is necessary is just to select suitably according to a use. Examples of the air-permeable pressure-sensitive adhesive layer include a pressure-sensitive adhesive layer in which the pressure-sensitive adhesive is partially present and the whole region is air-permeable, for example, a mesh-shaped pressure-sensitive adhesive layer or a stripe-shaped pressure-sensitive adhesive layer.
The pressure-sensitive adhesive may be laminated as it is on the breathable base material and / or the covering material, or the pressure-sensitive adhesive laminated on the separator may be attached to the base material and / or the covering material.

Examples of the adhesive constituting the non-hydrophilic adhesive layer include acrylic, urethane, rubber, silicone, polyisoprene, polyisobutene, styrene-isoprene-styrene (SIS), styrene-isoprene, and the like. Each pressure-sensitive adhesive can be used. In particular, acrylic or styrene-containing systems that can be hot-melt processed are preferably used.
As the styrene-containing pressure-sensitive adhesive, a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS), or a hydrogenated type thereof (SEBS, SIPS) is used as a base polymer. An example is a styrenic hot melt pressure sensitive adhesive.

  The hydrophilic pressure-sensitive adhesive constituting the hydrophilic pressure-sensitive adhesive layer is not particularly limited as long as it has adhesiveness with a hydrophilic polymer or a water-soluble polymer as a main component and is hydrophilic as the pressure-sensitive adhesive. Specifically, hydrophilic polymers such as polyacrylic acid, water-soluble polymers such as sodium polyacrylate and polyvinylpyrrolidone, and the like are listed as examples.

  At least a part of the exposed portion of the heating element and the pressure-sensitive adhesive layer is a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organosilicon compound, a hydrophobic polymer compound, a pyroelectric material, an antioxidant, a bone You may contain at least 1 type chosen from the additional component which consists of material, a fibrous material, a moisturizer, a functional substance, or these mixtures.

The intermittent cut according to the present invention includes a cut portion and a connecting portion (between the cut portion and the cut portion) penetrating therethrough. There are no restrictions on the shape, type, size (length, width, etc.), and combinations of these intermittent cuts, cuts, and joints. You may provide a notch in this intermittent notch.
The intermittent incision shapes are: (a) alternate notches, (b) straight notches (perforations), (b) alternate notches with V notches, (b) straight notches with V notches (perforated notches with V notches). ) Etc. are mentioned as an example. The V notch may be changed to another notch such as a U notch or an I notch.
At least one end of intermittent cuts such as perforations and staggered cuts of the present invention may or may not be in contact with at least one side of the heating element and at least one notch.

  The installation location and number of intermittent cuts in the heating element of the present invention can be provided in any number in any region other than the segmented heat generating portion, but the segmented portion is preferable as the installation region. Further, the cut provided in the heating element having the separator may be a cut that penetrates the separator, or may be a cut that does not penetrate the separator.

  In the perforated perforations and alternate cuts, which are a kind of the intermittent cuts, the cut portions are preferably longer than the joint portions. Further, this is not the case when hand cutting is possible depending on the type of packaging material, the bendability is improved, and the case where expansion and contraction is possible. Further, this is not the case in the vicinity of the end of the intermittent notch or the side of the heating element. Each length may be selected in consideration of the type of packaging material, the vicinity of the side of the heating element, the perforation in the vicinity of the notch, the positions of staggered cuts, and the like.

  The perforations of the present invention are usually in a single row, but can be selected according to the application, such as providing a plurality of adjacent rows, providing them in parallel, providing them in a staggered manner, and combinations thereof.

The alternate cuts of the present invention are two or more intermittent cuts arranged alternately. There are a pair of intermittent cuts, each consisting of a cut portion and a connecting portion, and having at least one cut portion and a connecting portion having different arrangement periods, and pulling in at least one direction. There is no limitation as long as it is a group of intermittent cuts having one or more directions in which the intermittent cuts are deformed and at least a part of the pulling direction extends and / or expands and contracts in the pulling direction. Are arranged such that a plurality of intermittent cuts are arranged at intervals, and the arrangement cycle of adjacent intermittent cuts in one direction is different, and three rows are arranged in a staggered cut or four rows Examples of staggered cuts with a set of 5 and staggered cuts with a set of 5 rows.
When the staggered cuts are stretched, the shapes of a plurality of cuts that pass through the staggered thickness in the thickness direction change, and the staggered cuts are deformed into a network structure, so that they can expand and contract. it can.

  The extensibility of the present invention is a property that extends in the direction in which tension is applied when tension is applied, and the length after removing the tension is not limited. That is, it does not matter whether or not to return to the original state. It is displayed as an expansion rate. Extensibility includes elasticity.

  The contractility of the present invention is a property that is shorter than the length at the time of elongation when tension is removed in the stretched state. Displayed as shrinkage. The contraction property may be contracted, and it is not always necessary to contract and return to the state before extension.

  The stretchability of the present invention is a property composed of the extensibility and the contractility. Displayed in terms of elongation and shrinkage. The contraction property may be contracted, and it is not always necessary to contract and return to the state before extension.

  In the intermittent incision according to the present invention, the ratio of the incision part to the joint part (notch part / joint part) is preferably 1.0 to 30, more preferably 1.01 to 30, and still more preferably 1. 0.01 to 20, more preferably 1.1 to 20, more preferably 1.3 to 20, still more preferably 1.5 to 20, and still more preferably 1.5 to 15. More preferably, it is 1.5-10, More preferably, it is 2.0-10.

The size of the cut portion is not limited, but the length is preferably 1 to 100 mm, more preferably 1 to 50 mm, still more preferably 1.5 to 50 mm, still more preferably 2 to 30 mm. More preferably, it is 5-20 mm.
The width is preferably more than 0 mm, more preferably more than 0 and 5 mm or less, still more preferably 0.001 to 5 mm, still more preferably 0.001 to 4 mm, still more preferably 0.00. It is 001-3 mm, More preferably, it is 0.001-2 mm, More preferably, it is 0.001-1 mm, More preferably, it is 0.01-1 mm.
In addition, the minimum value of the width | variety of a linear notch part does not have a restriction | limiting, What is necessary is just to cut | disconnect. More preferably, as described above.
The size of the connecting portion, which is the interval between adjacent cut portions in the extending direction of the cut portion, is not limited, but the length is preferably 0.01 to 20 mm, more preferably 0.01 to 10 mm, More preferably, it is 0.1-10 mm, More preferably, it is 0.1-8 mm, More preferably, it is 0.1-7 mm, More preferably, it is 0.1-5 mm. The width is the same as the width of the cut portion.
The interval between the adjacent intermittent cuts (adjacent interval) is not limited, but is preferably 0.1 to 20 mm, more preferably 0.1 to 15 mm, and further preferably 0.1 to 10 mm. More preferably, it is 0.1-5 mm, More preferably, it is 0.5-5 mm.
When the cut portion is circular or elliptical, the above length is the diameter or long axis.

The extensibility of the present invention is not limited as long as the elongation rate is greater than 1, if expressed as an elongation rate that is an extent of elongation, but it is preferably 1.005 to 10, although it depends on the application. More preferably, it is 1.01-10, More preferably, it is 1.01-5, More preferably, it is 1.01-4, More preferably, it is 1.01-3, More preferably, it is 1.01 It is -2, More preferably, it is 1.02-2, More preferably, it is 1.03-2, More preferably, it is 1.04-2, More preferably, it is 1.05-2.
Here, the extension ratio means a quotient obtained by dividing the length after extension by the length before extension. That is, the rate of elongation of the heating element = length after extension of the heating element / length before extension of the heating element.

If the shrinkage of the present invention is expressed by a shrinkage rate that is about a shortening, the shrinkage rate is not limited as long as it exceeds 1. More preferably, it is 1.01-10, More preferably, it is 1.01-5, More preferably, it is 1.01-4, More preferably, it is 1.01-3, More preferably, it is 1. It is 01-2, More preferably, it is 1.02-2, More preferably, it is 1.03-2, More preferably, it is 1.04-2, More preferably, it is 1.05-2.
Here, the shrinkage rate means a quotient obtained by dividing the length at the time of extension by the length after removing the external force.
That is, the contraction rate of the heating element = the length when the heating element is extended / the length of the heating element after the external force is removed.

“Folding” in the present invention means that at least a part of the folded portion is in contact with the region of the non-folded portion.
The ratio (A / B) of the width (A) of the section corresponding to the folded portion of the heating element of the present invention and the sum (B) of the thicknesses of the section heating sections on both sides thereof is 0.5 or more, Preferably it is 0.5-10, More preferably, it is 0.55-10, More preferably, it is 0.6-10, More preferably, it is 0.7-10, More preferably, it is 1.0- It is 10, More preferably, it is 1.2-10, More preferably, it is 1.2-5, More preferably, it is 1.2-3, More preferably, it is 2-3.
Moreover, when the width of the division part which corresponds to the folding part of the said heat generating body differs in the one surface side and the other one surface side, a narrow (short) width is made into the width (A) of a division part.

  In addition, since two or more heating elements are enclosed in a folded state, even if the heating element is large, it is very compact when packaged, has excellent portability, and has little change over time in the heat generation characteristics. Compared with the disposable body warmer, the number of members can be reduced, the cost can be reduced, the waste generated during use can be reduced, and there are also advantages of being friendly to the global environment. Moreover, you may enclose the division | segmentation heat generating part heat generating body of this invention, especially a stripe heat generating body in the outer bag in the wound state.

  The notch provided in the seal portion of the outer bag can be provided in any number and in any position except for the inside of the seal portion on the side where the heat generating body is housed. Examples include notches that are in contact with the outside of the seal portion and notches that are not in contact with either the inside or the outside of the seal portion. The notch (V notch, U notch, I notch, etc.) allows the user to easily tear and open the outer bag.

  For the outer bag, a so-called easy peel film may be used that, when sealed, is in a soft-adhesive state where the sealed portion can be easily peeled off. As the packaging sheet made of the easy peel film, a known material such as a non-breathable synthetic resin film coated with a styrene resin having an easy peel property can be appropriately used.

The outer temporary folding folding heating element with an outer bag of the present invention is a heating element stored in a non-breathable bag in a folded or rolled state, and is an exposed part of the heating element (heating element body). At least a part is temporarily attached to the inner surface of the outer bag which is a non-breathable storage bag (hereinafter referred to as outer temporary attachment).
The external temporary attachment means that the heating element main body and the outer bag which is a non-breathable storage bag are in contact with each other at least partially via a re-peeling weak adhesive layer (external temporary attachment layer). Thereby, the movement on the packaging material of the outer bag of a heat generating body main body can be prevented until the heat generating body main body is folded at least. There are no restrictions on the number, area, etc. of external garments. In the case of a heating element having a separator that protects fixing means such as an adhesive layer, the separator is also treated as a heating element.
The heating element of the present invention includes a folding heating element with an outer bag having no outer temporary attachment.

The adhesive constituting the outer temporary attachment layer used for the outer temporary attachment is not limited as long as the adhesive force is weak and the heating element can be retained in the packaging material until the folding operation is completed. A re-peelable weak pressure-sensitive adhesive is an example. In some cases, a weak adhesive may be used in place of the adhesive.
Specific examples include hot-melt adhesives, emulsion-based adhesives such as acrylic adhesives, and solvent-based adhesives such as rubber-based adhesives.
In particular, a compound having a high glass transition temperature is preferable. Acrylic compounds having a high ratio of acrylic acid components and rubber compounds having a high melting point tackifier are preferable.
Moreover, the adhesive used for the detachable sticky note paper marketed as Post-it / Post-it (trade name of 3M Co., Ltd.) can also be used.
Also, hot melt adhesives, especially hot melt adhesives (styrene adhesives such as SIS, acrylic adhesives, polypropylene adhesives, polyethylene adhesives, ethylene-propylene copolymer adhesives, etc.) preferable. Known or publicly available adhesives or adhesives with weak adhesive strength or adhesive strength can also be used.

  The adhesive strength is not limited as long as the heating element and the packaging material can be pasted until the folding work is finished, but 180 degree peel strength (JIS Z-0237) is preferable. 0.01 g / 25 mm to 0.9 kg / 25 mm, more preferably 0.01 g / 25 mm to 0.5 kg / 25 mm, still more preferably 0.01 g / 25 mm to 0.3 kg / 25 mm, More preferably, it is 0.01g / 25mm-0.1kg / 25mm, More preferably, it is 0.1g / 25mm-100g / 25mm.

  Moreover, there is no restriction | limiting in particular also about the application | coating thickness of the adhesive which comprises the said outer temporary attachment layer, Preferably it is 3 mm or less, More preferably, it is 0.1 micrometer-3 mm, More preferably, it is 0.1 micrometer-2 mm. More preferably, it is 0.1 μm to 1 mm.

Hereinafter, although the embodiment of the heat generating element converted from the heat generating precursor of the present invention will be described with reference to FIGS. 1 to 19, it is not limited only to the description in this drawing.
The exothermic composition in the heating element of the present description is an exothermic composition having an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more. The loop stiffness of each storage body of the divided heat generating portion heating element group in this description and the heat generating portion storage body composed of the divided heat generating portion and the dividing portion is 700 mN / cm or less.

FIG. 1A is a plan view showing an example of a rectangular heating element 2A.
FIG.1 (b) is sectional drawing of the AA.
The rectangular heating element 2A is a rectangular heating element 15 having one heating part 15 having a seal part 18 at the periphery. The hydrous exothermic composition 14 is sandwiched between a non-breathable base material 55 and a breathable coating material 54 provided with a solid acrylic pressure-sensitive adhesive layer 19 with a separator 23, and the periphery is sealed. . Usually, a rectangular heating element 2A is attached to the outside of the clothes so that heat is transmitted to the body through the clothes.

FIG. 2A is a plan view illustrating an example of the warm iron heating element 3.
FIG. 2B is a cross-sectional view taken along the line BB.
The heating element 3 has a single heating element 15 having a seal 18 at the periphery, and has a circular planar shape. This is a circular heating element 3 in which the hydrous heat generating composition 14 is sandwiched between a base material 55 provided with the pressure-sensitive adhesive layer 19 with the separator 23 and a breathable coating material 54. The hot-steaming heating element 3 having a diameter of 20 mm is attached to a body pot and used so as to transfer heat to the body.
FIG. 2C is a cross-sectional view showing another example of the warm iron heating element 3.
This is a hot-air heater 3 in which a space portion 21 having a diameter of about 8 mm is provided in the center of the adhesive layer 19.
When maintaining a normal temperature, the air-permeable packaging material may be used. However, when a particularly high temperature is desired, it is preferable to use a packaging material such as a highly air-permeable covering material than the air-permeability. The air permeability is a gas permeability according to the Gurley type gas permeability measured by JIS P8117, preferably 9 sec / 300 cc or less, more preferably 5 sec / 300 cc or less, and further preferably 3 sec / 300 cc or less. More preferably, it is 2 sec / 300 cc or less.
In addition, since the gas permeability according to the Gurley type gas permeability is about 0.4 sec / 300 cc, the measurement limit is about 0.4 sec / 300 cc. / (Cm ² / sec) or less, more preferably 1 to 40 cc / (cm ² · sec), still more preferably 1 to 20 cc / (cm ² · sec).

FIG. 3A is a plan view showing an example of the foot temperature heating element 4.
FIG. 3B is a cross-sectional view taken along the line CC.
This is a full-foot-shaped foot temperature heating element 4 having no intermittent cuts, which is composed of a single heating part heating element 2 having a seal portion 18 in the periphery of one heating part 15.
A laminate of a non-slip material 57 made of polyethylene / corrugated liner paper (core material 56) / a base material 55 made of polyethylene and a laminate of a porous film and a non-woven fabric made of nylon are used. The seal between the porous film of the polyethylene base material 55 and the covering material 54 sandwiching the hydrous exothermic composition 14 is a heat seal, but may be a pressure-bonded seal using an adhesive. The minimum bending resistance of the full-foot-shaped foot temperature heating element 4 having no intermittent notches such as the single heating part heating element 2 is 200 mm or more.
Although not shown, a base material obtained by laminating a covering material 54 provided with a breathable pressure-sensitive adhesive layer 20 on the porous film side by a melt blow method or the like, and a heat generating composition formed body 13A formed by forming the excess water heat generating composition 13 is laminated. It may be covered with the material 55, and the peripheral portion of the exothermic composition molded body 13A may be pressure-bonded and sealed to form a full-foot-shaped foot-temperature exothermic precursor. Further, a base 55 which is a laminate of a non-water-absorbent packaging material such as a non-slip absorbent material 57 and a non-water-absorbent corrugated cardboard liner paper is used, and a heat generating composition is formed on the non-water-absorbent packaging material side. The molded product 13A is laminated and further covered with a non-water-absorbing coating material 54. Similarly, the peripheral edge of the exothermic composition molded product 13A is pressure-bonded and sealed through the breathable pressure-sensitive adhesive layer 20 to form an all-foot-shaped foot. As the warm exothermic precursor, the foot warm exothermic body 4 having a total foot shape may be used.
FIG. 3C is a plan view showing another example of the foot temperature heating element 4.
Two divided heat generating portions 16 and 16 were formed so as to be separated at the substantially central portion of the foot temperature heating element 4, and a perforation 26 was provided at a substantially central portion of the divided portion 17 without the hydrous heat generating composition 14. A foldable all-foot-shaped foot temperature heating element 4. The seal between the polyethylene base material 55 and the porous film of the covering material 54 is a pressure-bonding seal using an adhesive. When the foot temperature heating element 4 is folded and stored in the outer bag 36, it becomes small and easy to carry, and the outer bag 36 can be saved.
The peripheral edge of the hydrous exothermic composition 14 in the foot temperature heating element 4 is a pressure-bonding seal using an adhesive, a heat seal using a heat seal material, or a temporary heat seal that is temporarily sealed with an adhesive and then heat-sealed. You can select from and use.

FIG. 4A is a plan view showing an example of the rigid and soft heating element 5A.
This is a rigid and soft heating element 5A having a minimum bending resistance of 50 mm or less, in which twelve elliptical divided heating portions 16 are provided at predetermined intervals in the vertical and horizontal directions with the dividing portion 17 interposed therebetween.
FIG. 4B is a plan view showing another example of the rigid and soft heating element 5A.
A rigid soft heating element 5A having a minimum bending resistance of 50 mm or less in a dumbbell shape in which six rectangular divided heating portions 16 are provided at predetermined intervals with the dividing portion 17 interposed therebetween.

FIG. 5A is a plan view showing an example of the stripe heating element 6.
FIG.5 (b) is DD sectional drawing.
Six rectangular segment heating portions 16 are stripe heating elements 6 having a minimum bending resistance of 50 mm or less provided in a stripe shape with the segment portions 17 as an interval.
Six hydrous heat generating compositions 14 having a rectangular planar shape are laminated on a base material 55 at intervals, covered with a breathable coating material 54, the peripheral edge of the hydrous heat generating composition 14, and the heating element. 6 is heat-sealed, and a pressure-sensitive adhesive layer 19 made of a SIS hot-melt pressure-sensitive adhesive is provided on a substrate 55 that is a non-ventilated surface, and a separator 23 is provided thereon. The stripe heating element 6 may be affixed to the outside of the garment to transfer heat to the body through the garment. Moreover, you may make it stick on a body using an adhesive layer for bodies, and may transmit a heat | fever to a body. Further, both sides may be made to be air permeable and water vapor generated from the heating element may be applied to the body side. The SIS hot-melt pressure-sensitive adhesive may be replaced with an acrylic adhesive.
FIG. 5C is a cross-sectional view showing another example of the stripe heating element 6.
A stripe heating element 6 having a minimum bending resistance of 50 mm or less, in which a mesh-like breathable pressure-sensitive adhesive layer 20 by a melt blow method with a separator 23 is provided on the ventilation surface side.
A ventilation surface side is attached to the inside of clothes such as underwear, and heat is transmitted to the body through the non-ventilation surface of the stripe heating element 6.
A stripe heating element 6 may be affixed to the outside of the garment to transfer heat to the body through the garment.
FIG. 5D is a cross-sectional view showing another example of the stripe heating element 6.
The stripe heating element 6 has a minimum bending resistance of 50 mm or less without the adhesive layer 19. The side ventilation part 58 of the segment heating part and the top 59 of the segment heating part have air permeability.
Further, both surfaces of the stripe heating element 6 are made to be air permeable surfaces, and the air permeable pressure-sensitive adhesive layer 20 or the partially non-breathable pressure-sensitive adhesive layer 19 is attached to the body side, and the stripe heat generation is performed on the body side. Water vapor generated from the body 6 may be applied.

FIG. 6A is a plan view showing an example of the separable heating element 7.
Eight divided heat generating portions 16 are provided in a stripe shape, and perforated lines 26 that can be cut by hand are provided in each divided portion 17.
Further, the perforation 26 is in contact with the side of the heating element 7, but the perforation 26 may not be in contact with the side of the heating element 7 as long as it can be cut by hand.
FIG. 6B is a plan view showing an example of the small heating element 7A.
The small heating element 7A is a separated small heating element 7A having a seal unit 18 in the peripheral part of the section heating part 16 as a minimum unit of the separable heating element 7 in FIG.
FIG. 6C is a plan view showing another example of the separable heating element 7.
A total of 16 segmented heat generating portions (width 8 mm × length 50 mm) 16 are provided at the top and bottom with a section 17 having a width of 9 mm as an interval.
A perforated line 26 that can be cut by hand is provided at substantially the center of each section 17, and an end of the perforated line 26 and a V notch 28 provided in the peripheral part of the heating element 7 are in contact with each other. Yes.
FIG. 6D is a plan view showing another example of the small heating element 7A.
This small heating element 7A is a separated small heating element 7A having a seal portion 18 in the peripheral part of the section heating part 16, which is the smallest unit of the separable heating element 7 in FIG.
6 (a) and 6 (c) can be separated into a desired small heating element 7A along an arbitrary perforation 26, and several separated small heating elements 7 can be separated as desired. The area can be warmed simultaneously.

FIG. 7A is a plan view showing an example of the expandable heating element 8.
FIG.7 (b) is sectional drawing of the same EE.
Six section heat generating sections 16 are provided in stripes with a section section 17 having a width of 7 mm as an interval, and the middle section section 17 is formed with three rows of staggered cuts 27 at 1.5 mm intervals. Yes. A part of the alternate cuts 27 is in contact with the peripheral portion of the expansion / contraction heating element 8. The hydrous exothermic composition 14 is sandwiched between a non-breathable base material 55 and a breathable coating material 54 provided with the pressure-sensitive adhesive layer 19 with the separator 23, and the periphery is sealed. The pressure-sensitive adhesive layer 19 is a layer having a thickness of about 50 μm made of a styrene-isoprene-styrene pressure-sensitive adhesive. Since the alternating cuts 27 in the longitudinal direction, which is a direction orthogonal to the direction of the alternating cuts 27, are reversibly deformed in a substantially mesh shape, the stretchable heating element 8 can be deformed in the longitudinal direction, that is, can be stretched. It is also useful to increase the stretchability of the stretchable heating element 8 by providing alternate cuts 27 in the other partitioning portions 17.

FIG. 8A is a plan view showing another example of the expandable heating element 8.
Six sets of two divided heat generating portions 16 are provided in a striped manner with a short-direction partitioning portion (width 10 mm) 17 interposed therebetween, and each of the short-direction partitioning portions 17 has three rows. Cuts 27 are provided, and at least part of the ends of the staggered cuts 27 are in contact with V notches 28 provided in the peripheral part of the heating element 8.
FIG. 8B is a plan view showing another example of the expansion / contraction heating element 8.
In the longitudinal direction, four divided heat generating portions 16 are provided at intervals of 10 mm-wide divided portions 17, and each of the divided portions 17 is formed with three rows of staggered cuts 27 at 1.5 mm intervals. Is in contact with the peripheral portion of the expandable heating element 8. Although not shown, the non-breathable base material 55 is provided with an adhesive layer 19 with a separator 23.

FIG. 9 is a plan view showing an example of the band heating element 9.
A heat generating portion 15 having six section heat generating portions 16 is fixed to a substantially central portion of the band 35, and hook and loop fasteners 22, 22, 22 are provided in the vicinity of both ends of the band 35 with different installation surfaces. The band 35 is provided with alternate cuts 27 and 27 with the heat generating portion 15 interposed therebetween. The band 35 is a non-extensible replaceable holding member (for example, 10 to 100 cm in length × 1 to 15 cm in width) made of a laminate of a nonwoven fabric and an elastomer film. The heat generating portion 15 may be fixed at an arbitrary position of the band 35. According to this position, alternate cuts 27 are provided.
In this example, the band heating element 9 is given stretchability by staggered cuts 27, but a stretchable material in which a stretchable material such as a polymer mesh (scrim) or rubber is sandwiched between the packaging materials is used for the band 35. May be.

FIG. 10A is a plan view showing an example of the tunnel ventilation heating element 10.
FIG.10 (b) is sectional drawing of the FF.
The local ventilation member 30 is provided so as to cover the ventilation surface side of the six section heat generating parts 16, and fixed parts (adhesive layer, adhesive layer, heat seal layer, etc.) made of an adhesive or the like at both ends in the longitudinal direction. 29 and 29 are fixed. A substantial space 31 is formed by the local ventilation member 30, the side ventilation part 58 of the divided heat generating part, and the dividing part 17, and air is taken in from the ventilation holes 32 at both ends. The pressure-sensitive adhesive layer 19 with the separator 23 is provided on the base material 55 side.
If desired, the local ventilation member 30 may be provided with ventilation holes 32 by perforation or the like.
Moreover, although not shown in figure, the local ventilation material 30 may be fixed to the at least one part of the top part 59 of one or more division heat generating parts via the fixing | fixed part 29 which consists of an adhesive. Also, the two local heat generating parts 16, the one classifying part 17, and one or more space parts 31 are taken as a set, and the local ventilation material 30 and the classifying part 17 are separated in the classifying part 17 outside the class heat generating part 16. May be fixed through a fixing portion 29 made of an adhesive, an adhesive, etc., and a perforated perforation 26 may be provided at the substantially central portion thereof to form a detachable medicine heating element 11A connected to the section 17. .

FIG. 11A is a partial enlarged cross-sectional view showing an example of the vicinity of the space portion 31 of the tunnel ventilation heat generator 10.
The hydrous exothermic composition 14 is sandwiched between the base material 55 having the pressure-sensitive adhesive layer 19 with the separator 23 and the air-permeable covering material 54, and the local air-permeable material 30 is not fixed to the section 17, and the top of the section heat-generating section 16. The section 59 is covered, and the section 17 is provided with one space 31 composed of the side ventilation section 58 of the section heat generation section, the section 17 and the local ventilation member 30.
FIG. 11B is a partial enlarged cross-sectional view showing another example of the vicinity of the space portion 31 of the tunnel ventilation heat generator 10.
A local ventilation material 30 is fixed to a substantially central portion of the partitioning portion 17 of the tunnel ventilation heating element 10 via a fixing portion 29 made of an adhesive, and two space portions 31 are provided in one partitioning portion 17. .

FIG. 12A is a plan view showing an example of the drug heating element 11.
FIG.12 (b) is sectional drawing of the same GG.
The hydrous exothermic composition 14 is sandwiched between the non-breathable base material 55 and the breathable coating material 54 provided with the pressure-sensitive adhesive layer 19 with the separator 23, the peripheral portion is sealed, and the section heat-generating portion 16. And a local ventilation member 30 having a ventilation hole 32 perforated on the concavo-convex surface composed of a partitioning portion 17 and a peripheral portion of the drug heating element 11 through a fixing portion (adhesive layer, adhesive layer, heat seal layer, etc.) 29 A substantial space 31 is formed from the local ventilation member 30, the side ventilation portion 58 of the segmental heat generating unit, and the partitioning portion 17, and air is taken in from the vent holes 32 of the local ventilation member 30. The minimum bending resistance of the drug heating element 11 is 50 mm or less. The local ventilation material 30 is a packaging material provided with a ventilation hole 32 perforated in a non-breathable packaging material. Further, the local ventilation member 30 may be fixed to at least a part of the apex 59 of one or more section heat generating portions via a fixing portion (adhesive layer, adhesive layer, heat seal layer, etc.) 29. The non-breathable substrate 55 is provided with a separator 23 and a pressure-sensitive adhesive layer 19 containing a functional substance.
FIG. 12C is a plan view showing another example of the drug heating element 11.
A non-breathable ventilation blocking sheet 33 with a handle 34 is detachably bonded to the ventilation hole 32 of the local ventilation member 30.
FIG. 12D is a cross-sectional view showing another example of the drug heating element 11.
This is a drug heating element 11 in which the adhesive layer 19 and the separator 23 are not provided.
The functional substance is contained in at least a part of the exposed portion of the drug heating element 11.
In the drug heating element 11, since the base material 55 and the local ventilation material 30 are non-breathable, the interaction between the hydrous heating composition 14 and the exposed portion of the pressure-sensitive adhesive layer 19 containing the functional substance can be prevented, respectively. The function of can be maintained. Further, by closing the ventilation holes 32 with the ventilation blocking sheet 33, the interaction between the hydrous exothermic composition 14 and the exposed portion of the drug heating element 11 can be completely prevented, and the drug heating element 11 that can withstand long-term storage can be obtained. .

FIG. 13A is a plan view showing another example of the drug heating element 11.
FIG. 13B is a cross-sectional view taken along the line H-H. The hydrous exothermic composition 14 is sandwiched between the non-breathable base material 55 and the breathable coating material 54, the peripheral portion is sealed, and the pressure-sensitive adhesive layer 19 (breathable pressure-sensitive adhesive is formed on the coating material 54 side. A local ventilation member 30 having a perforated ventilation hole 32 provided with a layer 20) is fixed on the entire periphery of the drug heating element 11 via a fixing part 29. The ventilation hole 32 is not provided with the pressure-sensitive adhesive layer 19 that blocks the ventilation. A substantial space portion 31 is formed by the local ventilation member 30, the side ventilation portion 58 of the divided heat generating portion, and the dividing portion 17, and air is taken in from the ventilation holes 32 of the local ventilation member 30. The functional substance is contained on the surface of the base material 55 of the drug heating element 11. It is preferable to provide the separator 23 on the pressure-sensitive adhesive layer 19 (or the air-permeable pressure-sensitive adhesive layer 20).

FIG. 14A is a plan view showing an example of a separable medicine heating element 11A.
FIG. 14B is a cross-sectional view taken along the line II.
A local ventilation member 30 having a ventilation hole 32 perforated on an uneven surface composed of a section heating section 16 and a section section 17 is separable via a fixing section (adhesive layer, adhesive layer, heat seal layer, etc.) 29. It is fixed on the entire periphery of the body 11A, and every other section 17 and the local ventilation material 30 are fixed via fixing parts (adhesive layer, adhesive layer, heat seal layer, etc.) 29. The top 58 of the section heat generating part is covered with the local ventilation material 30. A perforation 26 that can be cut by hand is provided in the substantially central portion of the region where the partitioning portion 17 and the local ventilation material 30 are fixed, and the two partitioning heat generating portions 16 and one partitioning portion 17 are taken as a set. Three sets are connected. Each set has a substantial space 31 formed by the local ventilation member 30 with the ventilation hole 32, the side ventilation part 58 of the segmental heat generating unit, and the segmenting part 17, and air is supplied from the ventilation hole 32 of the local ventilation unit 30. Incorporate. The end portion of the perforated perforation 26 is in contact with the peripheral portion of the separable medicine heating element 11A, but may be not in contact with the peripheral portion of the heating element 11A as long as it can be manually cut. On the substrate 55 side, a pressure-sensitive adhesive layer 19 with a separator 23 and containing a functional substance is provided. The perforation 26 may or may not penetrate the separator 23 as desired. Moreover, you may provide the V notch 28 etc. in the edge part of the perforated perforation 26 in the peripheral part of 11 A of separable chemical | medical agent heat generators if desired.
FIG. 14C is a cross-sectional view showing an example of the small drug heating element 11B.
This is a small medicine heating element 11B in which the separable medicine heating element 11A is separated by a perforated perforation 26.
The hydrous exothermic composition 14 is sandwiched between the base material 55 having the pressure-sensitive adhesive layer 19 with the separator 23 and the breathable coating material 54, and the side vent portion 58, the section portion 17, and the local vent member 30 with the vent holes 32 of the segment heat generation portion. Is a small drug heating element 11B having a space 31 composed of
At the time of use, the detachable drug heating element 11A can be divided into a plurality of small drug heating elements 11B and pasted to a desired place as desired.

FIG. 15A is a plan view showing an example of the eye temperature heating element 64.
FIG. 15B is a cross-sectional view taken along the line JJ.
The hydrous exothermic composition 14 is sandwiched between the non-breathable base material 55 and the breathable covering material 54, the peripheral portion is sealed, and the end portions 71, 71 with holes 72, 72 are provided at both ends. Each end is provided via fixing parts 29, 29 sealed at both ends of the heating element body, a V notch 28 is provided on the upper side of the central part, and the lower side corresponding to the periphery of the nose is a curved surface, Three divided heat generating portions 16, 16, and 16 are provided on both sides thereof. Further, in the eye temperature heating element 64 of the present invention, the V notch 28 may be replaced with a large V-shaped notch or a curved surface, or the like, and a notch, a curved surface, or the like may be added to the central portion.
FIG. 15C is a plan view showing another example of the eye temperature heating element 64.
The eye side 65 of the eye temperature heating element 64 is shown. Holes 72 provided with hand-cuttable incisions (perforations 26) in the center, and end portions of the ear hooks 71 with 71 are fixed via fixing portions 29 and 29 sealed at both ends of the heating element body. The V notch 28 is provided on the upper side of the central part, and the lower side corresponding to the peripheral part of the nose is a curved surface.
FIG. 15D is a cross-sectional view showing another example of the eye temperature heating element 64.
Texture members 66 and 66 made of a nonwoven fabric are provided on both sides of the eye temperature heating element 64. Space portions 31 and 31 are formed between the sorting portions 17 and 17 and the texture members 66 and 66.
At least one of the texture materials 66 may be replaced with the local ventilation material 30 or the local ventilation material 30 with the texture material 66. For example, the texture material 66 on the eye side 65 may be replaced with the local ventilation material 30 or the local ventilation material 30 with the texture material 66.
FIG. 15E is a plan view showing an example of the face temperature heating element 67.
This is a mask-shaped face temperature heating element 67. Ear hook rubbers 73 and 73 which are ear hooks 71 are provided at both ends, and the central section 17 is wide, and three divided heat generating sections 16, 16 and 16 are provided on both sides. The ear hook rubbers 73, 73 may be replaced with ear hook strings 73.
FIG. 15F is a perspective view showing another example of the face temperature heating element 67.
This is an assembled face temperature heating element 67. The segment heating element 5 such as the stripe heating element 6 is inserted into a mask 68 having ear rubbers 73 and 73 at both ends and provided with a heating element storage 69 supported by the heating element holder 70. To do.
If the heating element having the structure of the tunnel ventilation heating element 10 or the drug heating element 11 is used as the segment heating part heating element 5, it can be used at a more appropriate temperature.
FIG. 15G is a plan view showing an example of the nasal heating element 67A.
The integrated nose temperature heating element 67A is provided with a heating part 15 having one heating part 16 on each side of the central sorting part 17 and capable of heating at least regions corresponding to both sides of the nose.
If the heat generating part 15 is the heat generating part 15 having the structure of the tunnel ventilation heat generating element 10 or the drug heat generating element 11, the heat generating part 15 can be used at a more appropriate temperature.
FIG. 15H is a plan view showing another example of the tunnel ventilation heating element 10 for the face temperature heating element 67 and the nose temperature heating element 67A.
The local ventilation member 30 covers the two divided heat generating parts 16 and 16 provided across the central dividing part 17 and is fixed to both ends of the tunnel ventilation heat generating element 10 via fixing parts 29 and 29. Yes.

FIG. 16A is a plan view showing another example of the rigid and soft heating element 5A before being folded. The central section 17 has a section 17 having a width larger than half of the sum of the heights of the section heating sections 16 and 16 on both sides.
FIG. 16B is a plan view showing an example of the outer temporary-folding heating element 12 with the outer bag.
FIG.16 (c) is sectional drawing of the same KK.
A heating element 39 formed by folding the rigid and soft heating element 5A into two at the central section 17 with the air-permeable covering material 54 side inward is provided via a part of the outer bag 36 and the outer temporary attachment layer 37. The outer temporary folding folding heating element 12 with an outer bag is temporarily attached and enclosed in an outer bag 36 which is a non-breathable storage body. The I notch 28 is provided in the seal portion 38 of the outer bag 36 and is not in contact with the peripheral portion of the seal portion 38.
FIG. 16D is a plan view illustrating another example of the outer temporary folding folded heating element 12 with an outer bag.
A part of the outer bag 36 and the outer temporary attachment layer 37 are temporarily attached, and the folded heating element 39 is enclosed in the outer bag 36, and the I notch 28 is provided in the seal portion 38 of the outer bag 36, One end thereof is provided in contact with the outer peripheral portion of the seal portion 38 of the outer bag 36. Although not shown, the I notches 28 may be replaced with alternate cuts 27. You may provide in the one part area | region in the seal | sticker part 38 of one side of the outer bag 36, or all the areas.

FIG. 17 is a cross-sectional view showing the flexibility of the rigid and soft heating element 5A.
The rigid and soft heating element 5A having six divided heat generating portions protruding from the support base 60 is bent from the middle and is in contact with the oblique side of the support base 60, and exhibits high flexibility.

FIG. 18 is a cross-sectional view showing the inflexibility of the single heating part heating element 2.
The single heating element heating element 2 that is a commercially available sticker protruding from the support base 60 extends in the protruding direction, does not contact the oblique sides of the support base 60, and is not flexible.

FIG. 19A is a plan view showing an example of staggered cuts 27 which are a kind of intermittent cuts 25A. Three rows of the cuts 24 are staggered cuts 27 longer than the connecting portions 25.
FIG. 19B is a plan view showing an example of a perforation 26 which is a kind of intermittent cut 25A. The cut portion 24 is a perforation 26 longer than the connecting portion 25. This is preferable for use in hand cutting.
FIG. 19C is a plan view showing another example of the perforation 26 which is a kind of the intermittent cut 25A.
The cut portion 24 and the connecting portion 25 are an example of a perforation 26 having the same length.

In the physical properties of the heating element of the present invention, a plurality of storage bodies, heating precursors, and heating elements manufactured using the same heating composition and the same packaging material are regarded as one group, and the group has the same physical properties. Suppose that Based on this, the physical properties of the individual storage bodies, exothermic precursors, and exothermic bodies are defined. That is, when a plurality of physical properties cannot be measured and collected from the same sample, a plurality of samples are taken out from one group and measured, and the combined physical properties are taken as the physical properties of each sample belonging to the group.
The “manufactured using the same heating composition and the same packaging material” includes a plurality of heating elements having the same manufacturing number. The heating elements with the same serial number have the same physical properties and characteristics.

The plurality of heating elements having the same serial number is
1. 1. A heating element having the same production number selected from the group consisting of two or more heating elements. 2. A heating element that is not assigned a serial number and is selected from the group consisting of two or more heating elements manufactured using the same raw material and the same packaging material. When the surplus water exothermic composition having an excess water value exceeding 0 is used, the production number of the heating element (exothermic precursor) containing the surplus water exothermic composition is adopted.

   The production number is a production number assigned to any of a heating element, an outer bag of a heating element housed in an outer bag, and a collective bag having two or more heating elements such as pillow packaging and a box, or the like. Corresponding numbers, symbols, lot numbers, production lots, barcodes, etc., and information such as production year, month, and manufacturing machine. There are no restrictions as long as a plurality of heating elements are collected and the numbers and symbols are clear. For example, S10 2437, 7B08, 510264, and the like.

As an example, taking a sample group with the same serial number as an example, physical property measurement will be described.
First sample, second sample, and third sample are selected from the sample group, and the first sample measures the surplus water value of the exothermic composition before the heat generation, the rising temperature rise rate, and the loop stiffness of the container . The second sample measures the loop stiffness of the container after the end of heat generation. The third sample measures the minimum bending resistance before heat generation and the minimum bending resistance after heat generation. However, the minimum bending resistance before heat generation may be measured with the third sample, and the minimum bending resistance after heat generation may be measured with the fourth sample.
As the number of samples, the number of first samples is 1 or more, preferably 2 or more, more preferably 3 or more. The number of second samples is 1 or more, preferably 2 or more, and more preferably 3 or more.
It is preferable to use the arithmetic average of the number of samples for each sample value such as surplus water value, loop stiffness, minimum bending resistance.

  The thickness of the heating element is measured by measuring three or more points using a caliper and obtaining an average value.

  The end of “open the end of the divided heat generating portion of the heating element after the end of heat generation” indicates at least one of one end or both ends of the divided heat generating portion.

1. Loop stiffness measurement
A circular loop with a loop length of 50 mm is formed near the center of a strip-shaped sample having a width of 0.5 to 1 cm, preferably 1 cm, and a loop length of 50 mm or more, and the load applied when the circular loop is pushed in by 5 mm from the outside is measured per sample width. The value displayed in mN / cm is defined as loop stiffness.
If necessary, it is converted with 1 gF≈9.8 mN.
That is,
Loop stiffness [mN / cm] = Measured loop stiffness [mN]
/ Width of measurement sample [cm]
The number of measurement points is 1 point or more, preferably 2 points or more, more preferably 3 points or more.

2. Samples for measuring loop stiffness 1) Opening the end of the segment heating element of the sample heating element of the heating element storage body before heat generation, taking out the water-containing heating composition, and the segment heating part that is the non-sealed area of the remaining storage body A section of the storage body cut in the longitudinal direction of the region including the seal portion at the periphery of the heating element in a direction that passes through the section portion that is the region and the seal region substantially orthogonally is used as a sample.
2) Sample of storage body of heating element after completion of heat generation The heating element is heated in a normal atmosphere, and when the temperature of the heating element falls below 37 ° C, it is assumed that the use is finished, and the heat generation after the heat generation ends. Open the end of the section heat generating part of the body, take out the heat generating composition, and heat the heating element in a direction passing through the section heat generating area that is the non-sealing area of the remaining storage body and the section that is the sealing area almost orthogonally A section of the container cut out in the longitudinal direction of the region including the seal portion at the periphery of the sample is used as a sample.
3) Sample of section of heating element before heat generation A section cut in the longitudinal direction of the region including the seal portion around the heating element along the section of the heating element before heat generation is used as a sample. It may be a section of the storage body of the heating element before heat generation.
4) Sample of the section of the heating element after the end of heat generation A sample cut in the longitudinal direction of the region including the seal part at the periphery of the heating element along the section of the heating element after the end of heat generation is used as a sample. . It may be a section of the storage body of the heating element after the end of heat generation.

In measuring the loop stiffness of the sample,
1) Marking may be performed with a magic pen, a felt pen, or the like on a loop forming portion having a loop length of 50 mm.
2) When the fixing means such as an adhesive layer is provided, the fixing means is set inside, the separator is removed, and the loop stiffness is measured.
3) When the length of the sample is short, it may be measured by adding a fixing film or the like to the sample. For example, measurement may be performed by adding a fixing film or the like to a sample having a loop length of 50 mm.
4) If the heating element or storage body has local ventilation material, texture material, temperature buffer material, etc., remove them and cut out the sample. However, when they are fixed to the heat body or the storage body and the heating element or the storage body breaks when they are removed, samples are prepared by removing them as much as possible. This also applies to samples for measuring maximum tensile strength and elongation at break.

  The apparatus for measuring the loop stiffness is not limited as long as the loop stiffness can be measured, but examples include a loop stiffness tester manufactured by Toyo Seiki Co., Ltd., a loop stiffness tester manufactured by Tester Sangyo Co., Ltd., and the like.

When the sample for measuring the maximum tensile strength and breaking elongation of the heating element or storage section is cut out from the heating element or storage section, the breaking elongation of the section is extended along the longitudinal direction of the section. The value of elongation at break is used.
The width and length of the sample for measuring the maximum tensile strength and breaking elongation of the section are not limited as long as the maximum tensile strength and breaking elongation can be measured. A sample may be prepared and measured according to the size of the section. The width is preferably 20 mm or less and the length is preferably 200 mm or less.

The tensile test of the present invention is performed according to JIS L1096. For example, the packaging material is cut into a width of 8 mm and a length of 80 mm, and the end of the strip is subjected to a tensile force sufficient to remove all looseness without applying a load to the load cell, and the distance between chucks is 20 mm. Adjusted and installed in the device. Next, after the sample temperature is stabilized at a desired test temperature (for example, 25 ° C., 80 ° C., etc.), the apparatus is operated, and the crosshead speed is 50 to 400 mm / min, preferably 300 mm / min. Stretch and record on chart.
The measurement strips are preferably 3 to 20 mm in width and 30 to 200 mm in length, and the distance between chucks is preferably 10 to 100 mm.
1) Maximum tensile strength (g / mm)
The maximum value of the tensile strength of the sample is read from the chart, divided by the sample width, and the value converted to mm units is the maximum tensile strength.
2) Elongation at break
The elongation at the time when the sample breaks is read from the chart and defined as the elongation at break.
That is,
Q (%) = 100 × (NB−NS) / NS
Q: Elongation at break
NB: Length of sample at break (distance between chucks at break)
NS: Length of sample at installation (distance between chucks at installation)
In addition, when the width of the sample is narrow, it may be fixed on a mount or the like and tested.

  In the present invention, the elongation load and the elongation at break of the packaging material constituting the surface of the packaging material such as the base material and the coating material and the storage body are at least in one direction such as the packaging material, regardless of the vertical or horizontal direction. What is necessary is just to have the elongation load or breaking elongation, and the direction is not ask | required.

The rising temperature rising rate measuring method of the present invention uses an exothermic composition or an exothermic composition molded body, is airless, has an ambient temperature of 23 to 30 ° C., and preferably 23 ° C. Measure in a state where it can come into contact with When the exothermic composition or the exothermic composition molded body has heat, the measurement is preferably performed after the exothermic composition or exothermic composition molded body is brought to the ambient temperature. The exothermic temperature is measured using a data collector, and the temperature at the start of the test (Ts) and the temperature 5 minutes after the start of the test (Te) are measured at a measurement timing of 2 seconds. A thermometer can also be used.
1. In the case of the exothermic composition 1) A magnet so as to cover the shape of the punched hole in the mold near the center of the back surface of a plastic support plate (thickness 5 mm × length 600 mm × width 600 mm) such as vinyl chloride on the support base with legs. Is provided.
2) Place the bulb of the temperature sensor or thermometer on the center of the support plate.
3) A support plate with an adhesive layer interposed so that the center of a polyethylene film with a thickness of 25 μm × length 250 mm × width 200 mm is about 80 μm thick and the center of the polyethylene film of the sensor or thermometer Paste to.
4) On the center of the polyethylene film, place a template plate of length 250mm x width 200mm with a punch hole of length 80mm x width 50mm x height 4mm, place a sample near the punch hole, Move along the template surface to fill the sample with the sample. Next, temperature measurement is started except for the magnet under the support plate.
2. In the case of the exothermic composition molded body, 1) to 3) are the same as in the case of the exothermic composition.
4) The exothermic composition molded body is placed on the center of the polyethylene film, and temperature measurement is started. When the exothermic composition molded body is easily broken, it is broken and measured in the same manner as the exothermic composition. The exothermic composition to be measured is sealed in a non-breathable bag such as an outer bag and placed in an environment of 23 to 30 ° C., preferably 23 ° C., after the exothermic composition is in the environment. It is preferable to measure.
3. Rise temperature rise rate The rise temperature rise rate is the difference (Te−Ts) between the temperature (Ts) at the start of heat generation and the temperature (Te) 5 minutes after the start of the test.

The heat generation performance test of the present invention uses a heating element, and is measured in a state where the sample can be in contact with air at the time of measurement under the condition of no wind and ambient temperature of 23 to 30 ° C., preferably 23 ° C. It is preferable to make the measurement after bringing the heating element to ambient temperature. The exothermic temperature is measured by using a data collector or a thermometer to measure the exothermic characteristics.
1) Lay four towel cloths on a plastic support plate (thickness 5 mm × length 600 mm × width 600 mm) such as vinyl chloride on a support base with legs.
2) Place the temperature sensor or thermometer bulb on the center of the towel cloth.
3) Place the non-ventilated surface of the heating element toward the temperature sensor or thermometer sphere, and place the center of the heating element at the temperature sensor or thermometer sphere.
4) Overlay four towel cloths on it.
5) Start temperature measurement.

The bending resistance of the present invention indicates rigidity (harness, stiffness) or flexibility, and conforms to the JIS L 1096A method (45 ° cantilever method) except that the heating element itself is used as a sample. Is. That is, one side of the heating element is placed on the scale base line on a smooth horizontal base having a slope of 45 ° (degrees) at one end. Next, the heating element is slid gently in the direction of the slope by an appropriate method, and when the central point of one end of the heating element contacts the slope, the position of the other end is read on the scale. The bending resistance is indicated by the length (mm) that the heating element has moved. Each of the five heating elements is measured and an average value is obtained. However, it is assumed that the heating unit containing the heat generating composition of the heating element has a moving direction distance of 5 mm or more and a distance in the direction orthogonal to the moving direction of 20 mm or more on the horizontal table. In addition, the length of the heating element placed on the horizontal table is such that the area crossing the area where the exothermic composition is present or the area where the exothermic composition is present is not linear. It is assumed that you are crossing.
1) Measurement calculation method of bending resistance of heating element having pressure-sensitive adhesive layer (1) The surface of the heating element that does not have the pressure-sensitive adhesive layer is placed on a horizontal table and measured.
(2) If the side of the heating element that has the adhesive layer faces the side of the horizontal base and the adhesive layer cannot be measured on the horizontal base, attach a cover to the adhesive layer and place the surface of the adhesive layer side with the cover on the water. Measure on a flat table.
(3) The cover covering the pressure-sensitive adhesive layer of the heating element with the pressure-sensitive adhesive layer has a bending resistance of 30 mm or less, preferably 20 mm or less, more preferably 10 mm or less, still more preferably 5 mm or less, and / or Alternatively, a plastic film having a thickness of 50 μm or less, preferably 25 μm or less, more preferably 1 μm to 25 μm, still more preferably 1 μm to 15 μm, more preferably 1 μm to 10 μm, or a plastic film that can be wrinkled lightly. Use a soft film with no waist. Examples include wrap films such as polyethylene films, vinylidene chloride films, vinyl chloride films, and roll-shaped plastic bags.
2) Measurement and calculation method of minimum bending resistance For one heating element, place one side on a horizontal table and measure bending resistance in each direction. Next, the other surface is placed on a horizontal table and measured in the same manner to obtain each bending resistance. The smallest bending resistance of each value is defined as the minimum bending resistance.
3) As for the bending resistance of the packaging material such as the base material and the covering material, a short 100 mm × longitudinal 200 mm test piece is prepared, and the bending resistance in the longitudinal direction (200 mm direction) is adopted. When a test piece of the above size cannot be prepared from the packaging material, a test piece having a size close to the test piece is prepared and measured as much as possible.

The minimum bending resistance difference of the present invention is the difference between the minimum bending resistance before heat generation and the bending resistance after heat generation in the direction of minimum bending resistance before heat generation.
That is,
Minimum bending resistance difference = (Minimum bending resistance before heat generation)-(Minimum bending resistance before heat generation)
Bending after heat generation)
It is.
The bending resistance in the direction of the minimum bending resistance after the end of heat generation is assumed to be the end of use when the obtained heating element is heated in a normal atmosphere and the temperature of the heating element is below 37 ° C. This is the bending resistance of the heating element after the end of heating in the same direction as the minimum bending resistance before heating.

The change in the minimum bending resistance is a value indicating the ratio of the minimum bending resistance after the end of heat generation to the heating element or the heating portion before the heat generation. The minimum bending resistance change is calculated by the following equation.

Minimum bending resistance change (%) = ((B−A) / A) × 100
A: Minimum bending resistance (mm) of the heating element before heat generation
B: The minimum bending resistance (mm) of the heating element after completion of heat generation
1) Ignore heat generation during measurement and measure immediately.
2) The obtained heating element is left in air in a 20 ° C. environment without wind to generate heat. When the heating is finished and the temperature of the heating element becomes equal to the environmental temperature, the heating is finished. Then, the bending resistance of the heating element in the direction showing the minimum bending resistance of the heating element before the heating is measured to obtain the minimum bending resistance of the heating element after the end of heating.
Or, it is attached to the body or clothes to generate heat, and after the end of heat generation, measure the bending resistance of the heating element in the direction indicating the minimum bending resistance of the heating element before heat generation, and generate heat after the end of heat generation. Let it be the minimum bending resistance of the body.
3) The measurement direction of the minimum bending resistance of the heating element before heat generation and the measurement direction of the minimum bending resistance of the heating element after completion of heat generation are the same measurement direction.
4) When the minimum bending resistance (A) of the heating element before the heat generation cannot be measured and the minimum bending resistance (B) after the heating is completed can be measured, the minimum stiffness (B) of the heating element after the heating is completed is determined. The longest length of the heating element in the same direction as the direction in which it is present is defined as the minimum bending resistance (A).

The minimum bending resistance is the bending resistance with respect to the minimum bending resistance of the heating element or the heating portion and the total length in the direction, and is calculated by the following equation.
Minimum flexural modulus (%) = (A / L) × 100
A: Minimum bending resistance of heating element or heating part
L: Total length of the heating element or heating part in the direction showing the minimum bending resistance

The maximum bending resistance ratio is a ratio between a direction having the minimum bending resistance of the heating element and a bending resistance in a direction perpendicular to the minimum bending resistance of the heating element. This is an index indicating handleability, and the larger the value, the better the handleability. That is, if it has a structure that is easy to bend in one direction and is difficult to bend in a direction perpendicular to it, directionality occurs in the bending, and the direction that is difficult to bend becomes a column, and the heating element is easily attached to a human body or the like. The maximum bending resistance ratio indicates the ease of handling of the heating element, and the larger the value, the easier the handling.
Maximum stiffness ratio = (C / A)
A: Minimum bending resistance of heating element or heating part
C: Bending softness in a direction perpendicular to the direction having the minimum bending resistance of the heating element
However, if the maximum bending resistance is too large to be measured, the maximum length in that direction is the bending resistance (C).

  The measurement method is the same when obtaining arbitrary bending resistance and bending resistance change. In the description of each item of the minimum bending resistance, the minimum bending resistance change, and the minimum bending resistance ratio, "Can be removed. In the case of the bending resistance, the character “maximum” of the maximum bending resistance may be removed.

  The method for defining the surplus water value of the exothermic composition of the present invention was determined after 5 minutes after permeating the periphery of a cylindrical exothermic composition having a diameter of 29 mm and a height of 20 mm provided on JIS P3801 “Type 2” filter paper. The permeation distance of water or an aqueous solution is measured, and the permeation distance (mm) per unit height (mm) of the exothermic composition is defined as an excess water value.

The excess water value prescription | regulation method of the exothermic composition of this invention is demonstrated using FIGS.
FIG. 20 is a plan view showing a filter paper provided with a reference line.
FIG. 21 is a cross-sectional view showing a measuring apparatus.
FIG. 22 is a cross-sectional view showing the operation.
FIG. 23 is a cross-sectional view showing the measurement.
FIG. 24 is a plan view showing a filter paper for calculating the surplus water value.
The surplus water value measuring device 63 is used for the surplus water value prescribing method of the exothermic composition.
Under the environment of 20 ° C., eight reference lines 41 were written at 45 ° intervals radially from the center point using the exothermic composition 53 which was a sample adjusted in the environment.
JIS P3801 “Type 2” filter paper 40 (FIG. 20) is placed on a support plate (stainless steel plate or the like) 47, and a length of 150 mm having a cylindrical through hole 43 having a diameter of 29 mm and a height of 20 mm at the center of the filter paper 40. A measurement plate 42 having a smooth surface with a width of 100 mm is placed (FIG. 21), a heat generating composition (sample) 53 is placed near the cylindrical through hole 43, and the filling plate 48 is moved along the measurement plate 42 (FIG. 21). 22) A non-water-absorbing plastic film (70 μm polyethylene film or the like) is filled so as to cover the cylindrical through-hole 43 so that the exothermic composition 53 is filled and the exothermic composition 53 does not cause an exothermic reaction during the measurement. 50, and further, a pressing plate (a stainless steel flat plate having a thickness of 5 mm × a length of 150 mm × a width of 150 mm) 49 is placed thereon (FIG. 23). After holding for 5 minutes, the filter paper 40 is taken out (FIG. 24). Along the radial reference line 41, the penetration distance 52 of water or aqueous solution is the distance from the diameter circle 46 of the cylindrical through-hole having a diameter 44 of 29 mm to the penetration tip of the penetration mark 51 of the measurement plate 42. The height (mm) of the columnar through-hole is obtained by arithmetically averaging (mm) the eight permeation distances 52 (m1, m2, m3, m4, m5, m6, m7, m8) read in mm. The value obtained by dividing by 45 and further multiplied by 100 is obtained as the surplus water value. As the surplus water value of the sample, it is preferable to measure three points for the same sample, average the three surplus water values, and use the average value as the surplus water value of the sample. The surplus water value is a surplus water value of the current exothermic composition, and is a value that is not related to the total water content of the exothermic composition.
Further, a diameter circle 46 (dotted line circle in FIG. 20) of the cylindrical through hole may be described on the measurement filter paper 40 before the measurement. Line type does not matter.

  The filter paper that can be used in the method for determining the excess water value of the exothermic composition of the present invention is JIS P3801, “1 type”, “2 types”, “3 types”, “4 types”, “5 types A”, “5 types”. Examples of filter papers “B”, “5 types C”, and “6 types” are listed as examples, but there is no limitation as long as the filter paper has a drainage time of 120 seconds / 100 ml or less. JIS P3801 “Type 2” filter paper is preferred. A filter paper having a retained particle diameter of 4 to 6 μm and a drainage time of 70 to 90 seconds / 100 ml can also be used.

  The JIS P3801 “Type 2” filter paper is a filter paper No. manufactured by Toyo Filter Paper Co., Ltd. 2 and filter paper paper No. 2 manufactured by Nakamura Science Co., Ltd. 2 and Whatman filter paper grade 2 are examples.

  The material of the surplus water measuring device such as the measuring plate is not limited as long as it is non-water-absorbing, but there are metals such as stainless steel, synthetic resins such as thermoplastic resins and thermosetting resins, minerals such as stones and rocks, etc. As an example.

  The surplus water value of the exothermic composition of this invention is a value which can measure the amount of surplus water in the present exothermic composition rapidly. Since the permeation distance of excess water in the exothermic composition into the filter medium is proportional to the amount of excess water in the exothermic composition and the height or thickness of the exothermic composition, the amount of excess water in the exothermic composition at the time of measurement is It is the value shown as the surplus water value comprised from the ratio of the penetration distance to the filter medium of surplus water in the exothermic composition and the height of the exothermic composition.

  The method for defining the excess water value in the exothermic composition of the present invention is a value obtained by quantifying the amount of excess water in the exothermic composition from the height of the exothermic composition and the penetration distance of excess water in the exothermic composition into the filter paper, Regardless of the total amount of water in the exothermic composition, the amount of excess water in the exothermic composition at the time of measurement can be specified, the measurement operation is simple, easy, and can be measured quickly, and in the exothermic composition at the time of measurement This is a method for calculating a new specified amount of surplus water that indicates the amount of surplus water.

  The exothermic composition of the invention having an excess water value defined by the method for defining the excess water value in the exothermic composition of the present invention can predict moldability and exothermicity, and is useful for designing exothermic compositions and heating elements. In addition, even after manufacturing the heating element, by measuring the excess water value of the heating composition in the heating element, the deterioration state of the heating composition and the heating element due to moisture reduction, that is, the heating composition and heating element at that time The health of the heating element can be easily checked. The surplus water value is a practical value with high practicality.

  When the surplus water in the exothermic composition or mixed composition becomes an appropriate amount, the hydrophilic group in the composition component is hydrated by dipolar interaction or hydrogen bond, and also in the vicinity of the hydrophobic group. It appears to have a high structure. As a result, it is estimated that sandy sand is formed, and moldability of the exothermic composition occurs. In some sense, surplus water is a connected substance. In addition to this, there is also water in a state that can be called free water, and if excess water increases, the structure will soften and free water will increase. By using an appropriate amount of surplus water, each component particle is held together by the surface tension of moisture, causing the exothermic composition to form, and the moisture does not substantially function as an air barrier layer. It generates heat upon contact. It is the surplus water value of the present invention that determines an appropriate amount of surplus water.

  The surplus water exothermic composition having the surplus water value has moldability, while the hydrous exothermic composition having the surplus water value of 0 has good exotherm.

  The surplus water value of the present invention is an exothermic composition or reaction mixture (component mixture of exothermic composition before partial oxidation treatment of iron component) or exothermic mixture (component mixture of exothermic composition after partial oxidation treatment) ) Etc., the excess water, which is the amount of water that can be easily and freely moved out of the system or exuded, is quantified.

The surplus water value of the exothermic composition of the present invention is such that the surplus water which is water or an aqueous solution that can move in the moisture of the exothermic composition is on the filter paper in a direction perpendicular to the height or thickness direction of the exothermic composition. It is determined by the amount of penetration of water or aqueous solution.
Since the water or aqueous solution to which the exothermic composition can move moves in the weight direction and there is filter paper, the exothermic composition moves along the filter paper in a direction perpendicular to the height or thickness direction of the exothermic composition. The surplus water value is shown as a value per unit height.

  Since the penetration of the excess water amount of the exothermic composition into the filter medium or the filter paper is greatly affected by the thickness or height of the exothermic composition, the excess water value of the exothermic composition in the heating element of the present invention is the thickness of the exothermic composition or The value incorporating the height is adopted.

  The surplus water value of the present invention is a more practical value because the surplus water value indicating the surplus water amount in the exothermic composition can be obtained regardless of the total amount of water in the exothermic composition.

In the present invention, the installation method, pattern, and shape of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer, the adhesive layer, and the temporary attachment layer are not limited as long as the exothermic precursor functions as the exothermic precursor. Examples include various patterns and shapes such as continuous, intermittent, dot-like, mesh-like (mesh-like), stripe-like, lattice-like, dot-like, and belt-like shapes.
Examples of the installation method include an appropriate method such as a melt blow method, a curtain spray method, or a gravure method.
For the formation of the breathable pressure-sensitive adhesive layer, for example, a hot-melt type pressure-sensitive adhesive material is blown and developed through hot air under heating and melting, and a melt-blow method or pressure-sensitive adhesive provided in a net shape (spider web) is intermittently used. An application method such as a gravure method is useful.

  The material constituting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer, the adhesive layer, and the temporary attachment layer is not limited as long as these functions can be maintained, and the pressure-sensitive adhesive, acrylic-based, epoxy-based adhesives, known warmers, A pressure-sensitive adhesive used for the heating element, a commercially available adhesive or pressure-sensitive adhesive, a known adhesive or pressure-sensitive adhesive, or the like can be used.

  The thickness of the temporary adhesive layer (adhesive layer) is not limited as long as it can be temporarily applied, but is preferably 0.1 to 1000 μm.

  The thickness of the adhesive layer for fixing the local ventilation material is not limited as long as the local ventilation material can be fixed, but is preferably 1 to 1000 μm.

  The thickness of the pressure-sensitive adhesive layer is not limited as long as the heating element can be fixed, but is preferably 5 to 1000 μm.

  The fixing part is a region to be fixed to a packaging material when producing a heat generating precursor or a heat generating element, and is composed of an adhesive layer, an adhesive layer, a heat seal layer or the like, or an arbitrary mixed layer thereof, or a combination thereof. .

  The adhesive layer is composed of an adhesive, a pressure-sensitive adhesive, a heat seal material, and the like. There is no limitation as long as a packaging material or the like can be fixed. Examples of the constituent material include an adhesive such as a cyan adhesive, a pressure-sensitive adhesive described in the present specification, and a heat seal material.

  The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive, and is used to fix the packaging material and the packaging material and / or the packaging material to the heat-generating precursor or the heat-generating body or to bond them when producing the heat-generating precursor or the heat-generating body. There is no limitation as long as the packaging material can be fixed. An example of the constituent material is the pressure-sensitive adhesive described in the present specification.

  The mixed layer is a layer having at least two or more selected from the constituent components of an adhesive layer, an adhesive layer, and a heat seal layer.

  As the constituent material of the adhesive layer, the pressure-sensitive adhesive layer, and the temporary adhesive layer, those conventionally used for chemical warmers, heating elements and poultices, and those technically disclosed can be used.

EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited by these. The examples are described using a heating element having a hydrous exothermic composition with a surplus water value of 0 and an exothermic precursor having a surplus water exothermic composition with a surplus water value exceeding 0.
Moreover, the loop stiffness of the container was adjusted by adjusting the packaging material, the heat seal layer, the pressure-sensitive adhesive layer, and the like.
Moreover, description of symbols and the like used in Examples 1 to 10 is as follows.
t represents the duration (36 ° C. to the time during which the maximum temperature is maintained), Tm represents the maximum temperature, and Ave represents the average value of temperatures of 36 ° C. or higher.
The structure of the packaging material used for the outer bag is as shown below.

Outer bag packaging structure (excluding anchor coat layers)
Outer bag A: 15 μm OPP / 15 μm PVDC / 15 μmL DPE / 30 μm EVA
Outer bag B: 15 μm OPP / 20 μm PVDC / 15 μmL DPE / 30 μm EVA
Outer bag C: 15 μm OPP / 200Å silicon oxide vapor deposition film−12 μm PET / 1 5 μmL DPE / 30 μm EVA
Outer bag D: 15 μm OPP / 200Å aluminum oxide vapor deposition film−12 μm PET / 15 μmL DPE / 30 μm EVA
Outer bag E: 15 μm OPP / 300Å silicon oxide vapor deposition film−12 μm PET / 1 5 μmL DPE / 30 μm EVA

OPP stands for biaxially oriented polypropylene film, PVDC stands for polyvinylidene chloride film, LDPE stands for low density polyethylene film, and EVA stands for ethylene-vinyl acetate copolymer film.
In addition, according to the measurement by a measuring instrument manufactured by Mocon US under the conditions of moisture permeability by the Lissy method under the conditions of atmospheric pressure, temperature of 40 ° C. and humidity of 90% RH, and conditions of atmospheric pressure, temperature of 23 ° C. and humidity of 90% RH. As a result of measuring the oxygen permeability, it was as shown below. The unit of moisture permeability is g / (m ² · day), and the unit of oxygen permeability is ml / (m ² · day).

Oxygen permeability and moisture permeability of outer bag packaging

Outer bag: Oxygen permeability: Moisture permeability
Outer bag A: 2.6: 2.7
Outer bag B: 1.8: 1.9
Outer bag C: 1.5: 1.5
Outer bag D: 1.0: 1.0
Outer bag E: 0.8: 0.8

Example 1
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% saline solution, an excess water heating composition with an excess water value of 15, a polyethylene porous film and a nylon nonwoven fabric The laminate is made of a breathable coating material, a polyethylene film is provided with a base material made of a non-breathable sheet in which an adhesive layer with a separator is laminated on one side, and an ethylene-vinyl acetate copolymer film is laminated on the other side. The exothermic composition molded body formed through a mold using a 2 mm thick mold having a through hole is laminated on the polyethylene film surface of the base material, and the polyethylene film surfaces are overlapped with each other. Covered with Uni該 dressing, a peripheral portion of the heat-generating composition molded article was heat sealed, and cut, the seal width of the peripheral portion of the heating precursor at 8 mm, it has created a heating precursor of length 138 mm × width 93 mm. The divided heat generating part is 77 mm long × 12 mm wide, the divided part is 77 mm long × 10 mm wide, and six divided heat generating parts are provided at intervals with the divided part as an interval. The air permeability of the covering material was 400 by the water permeability by the Lissy method. The excess water value is the filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.

  Two outer packaging materials of 165 mm × 125 mm in size are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape, and the exothermic precursor Was sealed to prepare an exothermic precursor encapsulating the outer bag D having a moisture permeability of 1.0.

The heating element enclosed in the outer bag produced as described above was placed in a thermostat at 50 ° C. and held for 15 to 30 days. The measured number was taken out every 15 days and the excess water value was measured. A test group of heating elements having a hydrous exothermic composition with a surplus water value of 0 measured the heat generation performance and minimum bending resistance. The results are shown in Results 1, 2 and 3.
From this result, the water-containing exothermic composition kept in the outer bag for 30 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up immediately, It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Example 2)
Except that the outer bag C having a moisture permeability of 1.5 was used as the outer bag, a plurality of outer bag C-encapsulated exothermic precursors having a moisture permeability of 1.5 were produced in the same manner as in Example 1. Subsequently, the exothermic precursor was measured in the same manner as in Example 1 for holding and exothermic performance after holding and minimum bending resistance. The results are shown in Results 1, 2 and 3.
From this result, the water-containing exothermic composition that is kept in the outer bag for 15 days and has a surplus water value of 0 is a water-containing exothermic composition that has a significantly improved rising temperature rising rate and warms up quickly. It was recognized that it had excellent heat generation performance and had excellent flexibility from minimum bending resistance and minimum bending resistance change.

(Example 3)
As the outer bag, the outer bag C having a moisture permeability of 1.5 was used, and the excess water exothermic composition was used in the same manner as in Example 1 except that the excess water exothermic composition having an excess water value of 20 was used. The outer bag C enclosure exothermic precursor of the water vapor transmission rate 1.5 was produced.
Subsequently, the exothermic precursor was measured in the same manner as in Example 1 for holding and exothermic performance after holding and minimum bending resistance. The results are shown in Results 1, 2 and 3. From this result, the water-containing exothermic composition kept in the outer bag for 30 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up immediately, It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Example 4)
As the outer bag, the outer bag A having a moisture permeability of 2.7 was used, and a surplus water exothermic composition having an excess water value of 44 was used. The outer bag A-encapsulated exothermic precursor was prepared.
Subsequently, the exothermic precursor was measured in the same manner as in Example 1 for holding and exothermic performance after holding and minimum bending resistance. The results are shown in Results 1, 2 and 3. From this result, the hydrous exothermic composition that is kept in the outer bag for 30 days and has a surplus water value of 0 is a hydrous exothermic composition that has a significantly improved rising temperature rising rate and warms up quickly. It was recognized that it had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Result 1)

Control environment (50 ℃ × 60% RH)

Example: Outer bag: Water permeability of outer bag: Excess water value
Initial value: 15 days later: 30 days later
Example 1: Outer bag D: 1.0: 15: 5: 0
Example 2: Outer bag C: 1.5: 15: 0:-
Example 3: Outer bag C: 1.5: 20: 7: 0
Example 4: Outer bag A: 2.7: 44: 18: 0

(Result 2)

Temperature performance of exothermic composition

Example: Outer bag: Surplus water value: Rise rate
Before test: After test Before test: After test
Example 1: Outer bag D: 15: 0: 10 ° C .: 49 ° C. or higher Example 2: Outer bag C: 15: 0: 10 ° C .: 49 ° C. or higher Example 3: Outer bag C: 20: 0: 8 ° C. : 49 ° C or higher Example 4: Outer bag A: 44: 0: 6 ° C: 49 ° C or higher

(Result 3)

Performance of exothermic body with 0 excess water value of exothermic composition after test

Example: Heat generation performance: Minimum bending resistance: Change in minimum bending resistance
t: Tm: Ave
(Hr) (° C) (° C) (mm)

Example 1: 6.5: 42.0: 38.0: 42: -28
Example 2: 6.5: 42.5: 39.1: 42: -28
Example 3: 7.0: 42.0: 39.1: 42: -28
Example 4: 7.2: 41.5: 38.6: 42: -28

(Example 5)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% saline solution, and a surplus water heating composition having an excess water value of 11, a polyethylene porous film and a nylon nonwoven fabric The laminate was made of a breathable coating material, a base made of a non-breathable sheet in which an adhesive layer with a separator was laminated on one side of a polyethylene film, and an ethylene-vinyl acetate copolymer film was laminated on the other side. The exothermic composition molded body formed through a mold using a 3 mm thick mold having a through hole is laminated on the polyethylene film surface of the substrate, and the polyethylene film surfaces are overlapped with each other. Covered with Uni該 dressing, a peripheral portion of the heat-generating composition molded article was heat sealed, and cut, the seal width of the peripheral portion of the heating precursor at 8 mm, it has created a heating precursor of length 138 mm × width 93 mm. The divided heat generating part is 77 mm long × 12 mm wide, the divided part is 77 mm long × 10 mm wide, and six divided heat generating parts are provided at intervals with the divided part as an interval. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method. The excess water value is the filter paper No. manufactured by Toyo Filter Paper Co., Ltd. 2 (circular) was used to define.

  Two outer packaging materials of a size of 165 mm × 125 mm are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heated and fused to form a bag shape. Was sealed to produce a plurality of outer bag E encapsulated exothermic precursors having a water vapor transmission rate of 0.8.

  The heating element enclosed in the outer bag produced as described above was placed in a room without air conditioning and kept for 30 to 120 days by natural preservation. The measured number was taken out every 30 days and the excess water value was measured. The heating element having a hydrous exothermic composition with a surplus water value of 0 was measured for heat generation performance and minimum bending resistance. The results are shown in Results 4, 5, and 6. As for the room temperature, the maximum temperature during 120 days was 24 ° C., and the average temperature was about 20 ° C. From this result, the water-containing exothermic composition kept in the outer bag for 60 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up quickly. It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Example 6)
Except that the outer bag C having a moisture permeability of 1.5 was used as the outer bag, a plurality of outer bag C-encapsulated exothermic precursors having a moisture permeability of 1.5 were produced in the same manner as in Example 5. Subsequently, the exothermic precursor was measured in the same manner as in Example 5 for holding and exothermic performance after holding and minimum bending resistance. The results are shown in Results 6, 7, and 8. From this result, the water-containing exothermic composition kept in the outer bag for 30 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up immediately, It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Example 7)
As the outer bag, the outer bag B having a moisture permeability of 1.9 was used, and a surplus water exothermic composition having an excess water value of 20 was used. An outer bag B encapsulated exothermic precursor was prepared.
Subsequently, the exothermic precursor was measured in the same manner as in Example 5 for holding and exothermic performance after holding and minimum bending resistance. The results are shown in Results 4, 5, and 6. From this result, the water-containing exothermic composition held in the outer bag for 120 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and it becomes a water-containing exothermic composition that warms up quickly. It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.

(Result 4)


Example: Outer bag: Outer bag: Surplus water value
Water vapor permeability Initial value: 30 days later: 60 days later: 120 days later

Example 5: Outer bag E: 0.8: 11: 3: 0:-
Example 6: Outer bag C: 1.5: 11: 0: −: −
Example 7: Outer bag B: 1.9: 20: 16: 7: 0

(Result 5)

Temperature performance of exothermic composition


Example: Outer bag: Surplus water value: Rise rate
Before test: After test Before test: After test

Example 5: Outer bag E: 11: 0: 10 ° C .: 49 ° C. or more
Example 6: Outer bag C: 11: 0: 10 ° C .: 49 ° C. or higher
Example 7: Outer bag B: 20: 0: 8 ° C: 49 ° C or higher

(Result 6)
Performance of exothermic body with 0 excess water value of exothermic composition after test

Example: Heat generation performance: Minimum bending resistance: Change in minimum bending resistance
t: Tm: Ave
(Hr) (° C) (° C) (mm)
Example 5: 7.2: 41.5: 38.0: 30: 0
Example 6: 7.0: 42.0: 39.0: 30: 0
Example 7: 6.5: 42.5: 39.5: 30: 0

(Example 8)
A plurality of outer bag C-encapsulated exothermic precursors having a water vapor transmission rate of 1.5 were produced in the same manner as in Example 1 except that the perforated lines that can be cut by hand were provided at each section of the exothermic body. Subsequently, the exothermic precursor was measured in the same manner as in Example 1 for holding and exothermic performance after holding and minimum bending resistance.
It was kept in the outer bag for 15 days, and the minimum bending resistance of the heating element having a hydrous heating composition with an excess water value of 0 was measured. The minimum bending resistance before heat generation was 30 mm, the minimum bending resistance after completion of heat generation was 30 mm, and the change in minimum bending resistance was 0. It is estimated that the perforation has minimized the minimum stiffness at the section. It was found to have excellent flexibility.

Example 9
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline solution containing surplus water with a surplus water value of 15, a polyethylene porous film and a nylon nonwoven fabric The laminate was made of a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and a base made of a non-breathable sheet with an ethylene-vinyl acetate copolymer film laminated on the other side. The exothermic composition molded body formed through a mold using a 1.8 mm thick mold having a through hole is laminated on the polyethylene film surface of the base material, and the polyethylene film surfaces are overlapped with each other. Cover the covering material, heat-seal and cut the periphery of the exothermic composition molded body, and create a heat-generating precursor with a width of 138 mm and a width of 93 mm with a seal width of 8 mm around the heat-generating precursor. did. The divided heat generating part is 77 mm long × 12 mm wide, the divided part is 77 mm long × 10 mm wide, and six divided heat generating parts are provided at intervals with the divided part as an interval. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method.

  Two outer packaging materials of 165 mm × 125 mm in size are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape, and the exothermic precursor Was sealed to produce a plurality of outer bag C-encapsulated exothermic precursors having a water vapor transmission rate of 1.5.

  The exothermic precursor enclosed in the outer bag produced as described above was held in a thermostatic bath at a temperature of 50 ° C. for 15 days to produce a rigid and soft exothermic body having a hydrous exothermic composition with an excess water value of 0. The minimum bending resistance and the minimum bending resistance change of the heating element were measured, and the results are shown in result 7.

(Comparative Example 1)
A storage body sealed three-sided from the same base material and covering material as in Example 9 was prepared, and the hydrous exothermic composition taken out from the rigid and soft exothermic body having the hydrous exothermic composition of Example 9 with an excess water value of 0 was removed. It was stored in a bag, the storage port was heat-sealed, and a single heating part heating element that was a commercially available warmer type was produced. The minimum bending resistance and the minimum bending resistance change were measured. The test results are shown in result 7.

(Result 7)


Heating element: Example 9: Comparative Example 1
Rigid soft heating element Single heating element heating element
(Commercially available warmer type)

Exothermic part type: 6 divisional exothermic parts: 1 single exothermic part
Size (length x width): 138 mm x 93 mm: 138 mm x 93 mm
Heating element seal width: 8 mm: 8 mm
Heat generating part (length x width): 122 mm x 77 mm: 122 mm x 77 mm
Heating section width: 12mm:-
Division: 10 mm: −
Minimum bending resistance: 60mm: Cannot be measured without bending
(Before fever)
Minimum bending resistance: 48mm: Cannot be measured without bending
(After the end of fever):
Change in minimum bending resistance: −20: −
Minimum bending resistance: 43: −
Maximum bending resistance ratio: 1.6: −
Flexibility: Yes: No

  As shown in the result 7, the change in the minimum bending resistance of the bending-soft heating element of the present invention was a negative value, and at least the flexibility and flexibility were maintained not only before the heating but also after the heating. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.

(Example 10)
Six divided heat generating parts were provided at intervals with the divided part as an interval to produce a heating element. A non-breathable sheet in which a laminate of a polyethylene porous film and a nylon nonwoven fabric is laminated on a breathable coating, a pressure-sensitive adhesive layer with a separator is laminated on one side of the polyethylene film, and an ethylene-vinyl acetate copolymer film is laminated on the other side Was used as a substrate. The bending resistance of the base material and the covering material was 53 to 58. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method. A breathable packaging material made by bonding a nylon nonwoven fabric and a porous polyethylene film is used as a coating material, and a non-breathable packaging material made of a polyethylene film having a pressure-sensitive adhesive layer with a separator is used as a base material. As exothermic composition, iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size An excess water exothermic composition having an excess water value of 10 in which 0.9 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed was used.

Using the excess water exothermic composition, a exothermic composition molded body that was molded through a die having a thickness of 3.5 mm and having six through holes was laminated on the polyethylene film surface of the substrate. The covering material is covered so that the polyethylene film surfaces overlap each other, the peripheral portion of the exothermic composition molded body is heat-sealed and cut, the peripheral width of the exothermic precursor is 8 mm, and the length is 138 mm. X An exothermic precursor having a width of 93 mm was prepared. The divided heat generating part is 77 mm long × 12 mm wide, the divided part is 77 mm long × 10 mm wide, and six divided heat generating parts are provided at intervals with the divided part as an interval.

  Two outer packaging materials of 25 mm size are overlapped so that the surfaces having heat-fusibility are inside each other, the surroundings are heat-fused and molded into a bag shape, and the exothermic precursor is sealed Thus, a plurality of outer bag-encapsulated exothermic precursors were produced.

The exothermic precursor enclosed in the outer bag produced as described above was held in a constant temperature bath at a temperature of 50 ° C., and a exothermic body in which the excess water value of the hydrous exothermic composition was 0 was produced. The rising temperature rising rate of the water-containing exothermic composition was 42 ° C./5 minutes or more. The minimum bending resistance of the heating element, which is a bending / soft heating element, was 30 mm, and the minimum bending resistance change was zero. At least flexibility and softness were maintained not only before the heat generation but also after the heat generation. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.
The outer bag packaging material has a structure of 15 μm OPP / 10 μm PVDC / 10 μmL DPE / 20 μm EVA (excluding anchor coat layers), moisture permeability is 2.7 g / (m ² · day), and oxygen permeability is 2 .6 ml / (m ² · day).

(Example 11)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) An excess water exothermic composition in which 9 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed was used. The excess water value of the excess water exothermic composition was 25, and the rising temperature rising rate was 7 ° C./5 minutes or more.
As a breathable coating material, a laminate of a polyethylene porous film and a nylon nonwoven fabric is used. As a non-breathable substrate, an adhesive layer with a separator is provided on one side of the polyethylene film, and ethylene-vinyl acetate is provided on the other side. A laminate in which a copolymer film was laminated was used. The air permeability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using the base material and the packaging material of the covering material, three-way heat sealing is performed, and a plurality of segmented heat generating regions corresponding to six segmented heat generating portions and a segmented portion that is five heat sealed regions are formed in a stripe shape. A container was prepared. The surplus water exothermic composition is manually put into the divided heat generating region from the opening, and the opening is heat-sealed. The heat generating portion is composed of six divided heat generating portions and a heat sealing portion. The section heating part is 77 mm long × 15 mm wide, the sectioning section is 77 mm long × 5 mm wide, and six section heating sections are provided at intervals with the sectioning section as an interval. A plurality of segmented heat generating precursors having a seal width of 8 mm, a thickness of 1 mm, a length of 131 mm, and a width of 93 mm were prepared.

Two outer packaging materials having a size of 164 mm × 120 mm are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heated and fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 2.7 g / (m ² · day).

The outer bag-enclosed segment heat generating part exothermic precursor was held in a thermostat at a temperature of 50 ° C. for 30 days to produce a heat generating element. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 42 ° C./5 minutes. The minimum bending resistance of the heating element, which is a bending / soft heating element, was 60 mm, and the minimum bending resistance change was zero. At least flexibility and flexibility were maintained not only before the heat generation but also after the heat generation. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.
The outer bag packaging material has a structure of 15 μm OPP / 10 μm PVDC / 10 μmL DPE / 20 μm EVA (excluding anchor coat layers), moisture permeability is 2.7 g / (m ² · day), and oxygen permeability is 2 0.6 ml / (m ² · day). The loop stiffness of the heating element storage body was 98 mN / cm, and the total weight of the water-containing exothermic composition of the heating element was 18 g.

(Comparative Example 2)
A plurality of heating elements were prepared in the same manner as in Example 11 except that the loop stiffness of the storage body was set to 1000 mN / cm.

(Comparative Example 3)
A plurality of heating elements were prepared in the same manner as in Comparative Example 2 except that the total weight of the hydrous exothermic composition was 54 g.

For the heating elements of Example 11, Comparative Example 2, and Comparative Example 3, the minimum bending resistance and use evaluation were performed. The usage evaluation method evaluated the feeling of use of the heating element by performing a monitor test with 10 panelists. The result shown in Result 8 was obtained.

Usability evaluation Good: Flexible, not stiff, smooth along the body, no resilience to return, feels soft when touched, and feels soft Soft and comfortable to use.
Defective: Inflexible, stiff, repulsive when trying to follow the body, feels firm when gripped by hand, feels hard and uncomfortable to use.

(Result 8)

Example: Exothermic composition: Loop: Minimum bending resistance: Evaluation of use Total weight Stiffness
(G) (mN / cm) (mm)

Example 11: 18: 98: 48: Good Comparative Example 2: 18: 1000: Unmeasurable: Defect Comparative Example 3: 54: 1000: 68: Defect

Thus, by comparing the heating element defined only by the minimum bending resistance that defines the flexibility and the heating element defined by the loop stiffness that defines the resilience and the flexibility,
1) A heating element using a storage body having a low loop stiffness as in Example 11 has high flexibility and low resilience and good flexibility, and the warming body has smoothness along the side, and heat is generated. There is practical flexibility as a body.
2) On the other hand, the heating element defined by only the minimum bending resistance as in Comparative Example 2 and Comparative Example 3 can keep the apparent flexibility low due to the total weight of the heating composition, but the resilience of the storage body , Alongside, and resilience of the heating element, the alongness cannot be specified, there is a resilience to return to the original when it is along the body, the section is not flexible, practically flexible as a heating element There is no sex.
3) The practical flexibility of a heating element having a plurality of segmented heating parts cannot be defined by the minimum bending resistance, and it is indispensable to define it by loop stiffness.
As described above, the heating element of the present invention has practical flexibility such that there is no resilience when placed along a body to be heated, and the feeling of wearing and feel is good.

Example 12
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 1 part by weight, 0.5 part by weight of slaked lime, 0.7 part by weight of sodium sulfite, 11% salt water mixed surplus water heating composition, laminate of polyethylene porous film and polypropylene nonwoven fabric breathable Thickness 1 having six through-holes using a base material made of a non-breathable sheet in which an adhesive layer with a separator is laminated on one side of a material, a polyethylene film, and an ethylene-vinyl acetate copolymer film laminated on the other side The exothermic composition molded body molded through a mold using a 2 mm mold is laminated on the polyethylene film surface of the base material so that the polyethylene film surfaces overlap each other. Cover the covering material, heat seal the peripheral edge of the heat-generating composition molded body, cut it, and have 6 section heat generation sections, the section is 65 mm long x 8.5 mm wide, the section heat generation section is 65 mm long A heat generating precursor having a composite heat generating portion with a width of 8 mm, a seal width of 10 mm at the peripheral portion, and a length of 127 mm and a width of 85 mm was prepared. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials having a size of 164 mm × 120 mm are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heated and fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 1.1 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 360 days by natural storage to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 20 ° C./5 minutes. The loop stiffness of the heating element storage body was 200 mN / cm. The room temperature was 36 ° C. during the 360 days. Further, the heating element was taken out from the outer bag, fixed to clothes with the adhesive layer, and subjected to a heating test. However, it quickly became warm and the warm time lasted for 6 hours or more. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 13)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water mixed surplus water exothermic composition, laminate of polyethylene porous film and nylon nonwoven fabric breathable coating Thickness 2 having 6 through-holes using a base material made of a non-breathable sheet in which an adhesive layer with a separator is laminated on one side of a material, a polyethylene film, and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through a mold of 5 mm was laminated on the polyethylene film surface of the substrate, and the coating was made so that the polyethylene film surfaces overlap each other. And heat-sealing the peripheral part of the heat-generating composition molded body, cutting it, and having 6 section heat generation sections, the section section is 65 mm long x 8.5 mm wide, the section heat generation section is 65 mm long x width An exothermic precursor having an 8 mm composite heat generating portion, a peripheral seal width of 10 mm, and a length of 127 mm × width of 85 mm was prepared. The air permeability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes.

  Two outer packaging materials having a size of 164 mm × 120 mm are superposed so that the surfaces having heat-fusibility are inside each other, and the periphery is heated and fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 1.3.

The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 180 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 26 ° C./5 minutes. The maximum temperature during the 180 days was 36 ° C. Also, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was conducted, but the heating element was bent from the section and fixed tightly along the clothes, immediately becoming warm and warm. The time lasted more than 6 hours.
The heating element storage body had a loop stiffness of 98 mN / cm, the maximum tensile strength at 25 ° C. of at least one section was 155 g / mm, and the elongation at break was 98%. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 14)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% saline solution containing excess water, and a breathable coating of a laminate of a polyethylene porous film and a polypropylene nonwoven fabric A 1.2 mm-thick mold having 8 through-holes using a base material made of a non-breathable sheet in which a nonwoven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the base material, and the covering material was covered so that the polyethylene film surfaces overlap each other, The peripheral part of the thermal composition molded body is heat-sealed, cut, the peripheral width of the exothermic precursor is 6 mm, it has 8 section heat generating sections, the section is 73 mm long x 3 mm wide, section The heat generating part had a composite heat generating part having a length of 73 mm × width of 12.5 mm, a seal width of 8 mm, and a heat generating precursor having a length of 127 mm × width of 94 mm was prepared. The air permeability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water-containing exothermic composition was 10, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials having a size of 230 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 1.6 g / (m ² · day).

 The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 180 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 19 ° C./5 minutes. The maximum temperature during the 180 days was 36 ° C. Further, the heating element was taken out from the outer bag, fixed to clothes with the adhesive layer, and subjected to a heating test. However, it quickly became warm and the warm time continued for 8 hours or more. The heating element storage body had a loop stiffness of 150 mN / cm, and one section had a loop stiffness of 220 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 15)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water-containing surplus water exothermic composition, and a breathable coating of a laminate of a polyethylene porous film and a nylon nonwoven fabric A 1.5 mm-thick mold having 6 through-holes using a base material made of a non-breathable sheet in which a nonwoven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the substrate, and the covering material was covered so that the polyethylene film surfaces overlapped with each other. The peripheral part of the molded product is heat-sealed, cut, the seal width of the peripheral part of the exothermic precursor is 6 mm, it has 6 section heat generating sections, the section is 73 mm long x 5 mm wide, the section heat generating section Has a composite heat generating part of length 73 mm × width 15 mm, a heat generation precursor having a seal width of 6 mm, length 127 mm × width 85 mm was prepared. The breathability of the covering material was 290 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water exothermic composition was 20, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials having a size of 230 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 2.0 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning, and kept for 120 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 25 ° C./5 minutes. The maximum temperature during the 120 days was 36 ° C. Also, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was conducted, but the heating element was bent from the section and fixed tightly along the clothes, immediately becoming warm and warm. The time lasted more than 8 hours. The loop stiffness of the heating element storage body was 49 mN / cm, and the loop stiffness of one section was 88 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 16)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% saline solution containing excess water, and a breathable coating of a laminate of a polyethylene porous film and a polypropylene nonwoven fabric A 1.0 mm thick mold having six through-holes using a non-breathable sheet in which a non-woven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the base material, and the covering material was covered so that the polyethylene film surfaces overlap each other. The peripheral edge of the heat composition molded body is heat-sealed, cut, the peripheral width of the exothermic precursor is 6 mm, it has 6 section heat generating sections, and the section is 73 mm long x 5 mm wide. The heat generating part had a composite heat generating part having a length of 73 mm × width of 15 mm, a seal width of 6 mm, and a heat generating precursor having a length of 127 mm × width of 85 mm was prepared. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials having a size of 230 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 2.8 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 25 ° C./5 minutes. As for the room temperature, the maximum temperature during 90 days was 36 ° C, and the average temperature was about 25 ° C. Also, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was conducted, but the heating element was bent from the section and fixed tightly along the clothes, immediately becoming warm and warm. The time lasted more than 6 hours. The loop stiffness of the heating element storage body was 350 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 17)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water mixed surplus water exothermic composition, a laminate of a polyethylene porous film and a polypropylene nonwoven fabric is breathable A 1.5 mm-thick mold having 6 through-holes using a base material made of a non-breathable sheet in which a nonwoven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the base material, and the covering material was covered so that the polyethylene film surfaces overlap each other. The peripheral edge of the heat composition molded body is heat-sealed, cut, the peripheral width of the exothermic precursor is 6 mm, it has 6 section heat generating sections, and the section is 73 mm long x 5 mm wide. The heat generating part had a composite heat generating part having a length of 73 mm × width of 15 mm, a seal width of 6 mm, and a heat generating precursor having a length of 127 mm × width of 85 mm was prepared. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water exothermic composition was 20, and the rising temperature rising rate was 8 ° C./5 minutes.

Two outer packaging materials having a size of 230 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 2.0 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning, and kept for 120 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 35 ° C./5 minutes. The maximum temperature during the 120 days was 36 ° C. The heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was conducted, but the heating element was bent from the section and was fixed tightly along the clothes, immediately becoming warm and warm. The time lasted more than 8 hours. The heating element storage body had a loop stiffness of 95 mN / cm, and one section had a loop stiffness of 156 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 18)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water mixed surplus water heating composition, laminate of polyethylene porous film and polypropylene nonwoven fabric breathable A 1.0 mm thick mold having six through-holes using a non-breathable sheet in which a non-woven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the base material, and the covering material was covered so that the polyethylene film surfaces overlap each other. The peripheral edge of the heat composition molded body is heat-sealed, cut, the peripheral width of the exothermic precursor is 6 mm, it has 6 section heat generating sections, and the section is 73 mm long x 5 mm wide. The heat generating part had a composite heat generating part having a length of 73 mm × width of 15 mm, a seal width of 6 mm, and a heat generating precursor having a length of 127 mm × width of 85 mm was prepared. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water exothermic composition was 30, and the rising temperature rising rate was 7 ° C./5 minutes.

Two outer packaging materials having a size of 230 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heat-fused to form a bag shape. Was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The moisture permeability of the outer bag was 2.8 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 180 days by natural preservation to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 37 ° C./5 minutes. As for the room temperature, the maximum temperature during 180 days was 36 ° C., and the average temperature was about 25 ° C. In addition, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was performed, but the heating element was bent from the section, was fixed tightly along the clothes, and immediately became warm, Warm time lasted over 6 hours. The loop stiffness of the heating element storage body was 30 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 19)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water heating composition. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 8 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
Laminate of polypropylene nonwoven fabric and polyethylene porous film, breathable coating material, polyethylene film with separator on one side, SIS adhesive layer, and ethylene-vinyl acetate copolymer film on the other side The laminate was used as a non-breathable substrate. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width and a heat generating part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generation precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 2.0 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of the 230 mm × 125 mm sized packaging material are overlapped so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning, and kept for 120 days by natural preservation to produce a exothermic body. The temperature rise rate of the water-containing exothermic composition was 0 ° C. for 5 minutes. The maximum temperature during 120 days was 36 ° C. The heating element is taken out from the outer bag, and the heating element is taken out from the outer bag and fixed to the waist with the SIS-based adhesive layer, and the heat generation test is performed.The heating element is bent from the section, It was fixed tightly along the waist, warmed up quickly and warmed up for over 6 hours. The heating element was a heating element having excellent heat generation performance and excellent flexibility. The heating element storage body had a loop stiffness of 95 mN / cm, and one section had a loop stiffness of 156 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 20)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 25, and the rising temperature rising rate was 6 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
Non-breathable laminate with polypropylene nonwoven fabric and polyethylene porous film, breathable coating, polypropylene nonwoven fabric on one side of polyethylene film, and ethylene-vinyl acetate copolymer film on the other side Used as a base material. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal the periphery of the exothermic composition molded body, and then apply a mesh-like ventilation made of a SIS-based adhesive to the breathable surface by a melt blow method. A pressure-sensitive adhesive layer is provided, and a separator is applied and cut, and the six divided heat generating portions are provided at intervals, with the divided portions being the heat seal regions as intervals, and the divided heat generating portions are 82 mm long × 15 mm wide. A plurality of heating elements each having a heating part of 82 mm in length × 6 mm in width and a seal width of 6 mm in the peripheral part and 127 mm in length × 94 mm in width were prepared.

A packaging material having a moisture permeability of 1.6 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of the 230 mm × 125 mm sized packaging material are overlapped so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 270 days by natural storage to produce a exothermic body. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 19 ° C./5 minutes. The maximum temperature during the 270 days was 36 ° C. The heating element is taken out from the outer bag, and the heating element composed of the divided heating part and the partitioning part of the heating element and the surrounding sealing area are cut out, and the loop stiffness of the container excluding the heating composition is measured. 80 mN / cm was obtained. The minimum bending resistance was 48 mm, and the minimum bending resistance change was zero. Further, the heating element was taken out from the outer bag, and the heat-permeable test was performed by fixing the inner side of the underwear so that the air-permeable pressure-sensitive adhesive layer faced the inner side of the underwear. Along with the body, it was fixed tightly, became warm immediately, and the warm time lasted more than 6 hours. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 21)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water mixed surplus water exothermic composition, laminate of polyethylene porous film and nylon nonwoven fabric breathable coating A 0.5 mm thick mold having six through-holes, using a base material made of a non-breathable sheet in which a nonwoven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the substrate, and the covering material was covered so that the polyethylene film surfaces overlapped each other, and the exothermic composition The periphery of the molded body is heat-sealed and cut, and the seal width of the peripheral portion of the exothermic precursor is heat-sealed with a width of 10 mm, cut, and has six divided heat generating portions, with a divided portion having a length of 74 mm × An eye mask type heat-generating precursor having a width of 10 mm, a segmented heat generating portion having a heat generating portion of length 74 mm × width 20 mm, a seal width of 10 mm, length 190 mm × width 90 mm was prepared. An exothermic precursor composed of an eye heating element in which both ends of an ear hook made of a non-woven fabric that can be cut in the center at both ends in the longitudinal direction of the heating element via an adhesive was prepared. . The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method. Excess water value is filter paper No. manufactured by Toyo Filter Paper Co., Ltd. 2 (circular) was used to define. The surplus water value of the surplus water-containing exothermic composition was 15, and the heating rate was 0 ° C./5 min. of

  Two outer packaging materials with a size of 230 mm x 125 mm are overlapped so that the surfaces having heat-sealing properties are inside each other, and the periphery is heat-sealed to form a bag shape, and the exothermic precursor is sealed A plurality of outer bag-enclosed eye temperature exothermic precursors were prepared. The moisture permeability of the outer bag was 1.2.

The outer bag encapsulated eye temperature exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to produce a heating element. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 21 ° C./5 minutes. The room temperature was 36 ° C. during 90 days. Next, the eye mask-shaped eye temperature heating element was taken out from the outer bag, the breathable surface was pointed to the eyes, and the ear-hooked part was fixed to the face so as to cover the eyes. It became warm and warm and warm for more than 10 minutes. The heating element was a heating element having excellent heat generation performance and excellent flexibility.
The heating element had a loop stiffness of 98 mN / cm.

(Example 22)
A local ventilation material comprising a two-layer laminate of an air-through nonwoven fabric (texture) / polyethylene porous film in which three 2 mmφ perforations are provided at equal intervals on the entire ventilation surface of the eye mask-shaped eye temperature exothermic precursor. Is fixed to the peripheral part of the exothermic precursor through an adhesive layer (fixing part) made of an adhesive, and the moisture permeability is 5000 g on the eye side. Except for providing a feel material comprising a three-layer laminate of spunbond nonwoven fabric (strength) / melt blown nonwoven fabric (breathable) / thermal bond nonwoven fabric (texture) exceeding / (m ² · day). An eye temperature exothermic precursor was prepared, and then a plurality of outer bag encapsulated eye temperature exothermic precursors were prepared. The moisture permeability of the outer bag was 1.1 g / (m ² · day).

The outer bag encapsulated eye temperature exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to produce a heating element. The excess water value of the heating element was 0, and the rising temperature rising rate of the hydrous exothermic composition was 12 ° C./5 minutes. The rising temperature rising rate of the hydrous exothermic composition having an excess water value of 0 was 12 ° C./5 minutes. The room temperature was 36 ° C. during 90 days.
Next, the eye mask-shaped eye temperature heating element was taken out from the outer bag, and a heat generation test was carried out by fixing it to the face with an ear hook so as to cover the eyes with the breathable surface facing outward. The body feels good, the skin feels well, it quickly warms up, and the warm and appropriate temperature lasts for more than 10 minutes. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 23)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.4 parts by weight, water-absorbing polymer (particle size 300 μm or less) 2 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water-containing surplus water heating composition, a laminate of a polyethylene porous film and a nylon non-woven fabric is breathable A 1.2 mm-thick mold having 6 through-holes using a base material made of a non-breathable sheet in which a nonwoven fabric is laminated on one side of a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side The exothermic composition molded body that was molded through the mold was laminated on the polyethylene film surface of the substrate, and the covering material was covered so that the polyethylene film surfaces overlapped with each other. The peripheral part of the molded product is heat-sealed, cut, the seal width of the peripheral part of the heat generation precursor is 8 mm, it has two divided heat generating parts, the divided part is 30 mm long × 22 mm wide, the divided heat generating part Produced a mask-shaped exothermic precursor having a heating part of 30 mm in length and 15 mm in width at the top, a seal width of 8 mm, and a length of 116 mm and a width of 95 mm. Further, a local ventilation material, which is a non-breathable polyethylene film, is provided on the ventilation surface via an adhesive so that air can be ventilated only from both ends of each section. Further, rubber is provided at both ends in the longitudinal direction of the heating element. A nose temperature exothermic precursor, which is a kind of mask-shaped face temperature exothermic precursor, was prepared. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method. The excess water value is the filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define. Moreover, the surplus water value of the excess water exothermic composition of the mask-shaped nasal temperature exothermic precursor was 40, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials having a size of 140 mm × 125 mm are overlapped so that the surfaces having heat-fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The precursor was sealed to prepare a plurality of outer bag-encapsulated nasal temperature exothermic precursors. The moisture permeability of the outer bag was 1.1 g / (m ² · day).

The nasal temperature exothermic precursor enclosed in the outer bag was placed in a thermostatic bath at 50 ° C. and held for 30 days to produce a heating element. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 20 ° C./5 minutes. Next, the mask-shaped nasal heating element was taken out from the outer bag, and the fever test was conducted by fixing it to the face with the ear hook so that the upper heating part was located around the nose. The surroundings were warmed and a pleasant warm time lasted for more than 2 hours. The heating element was a heating element having excellent heat generation performance and excellent flexibility. The heating element had a loop stiffness of 98 mN / cm.
This is particularly effective for measures to warm the nose such as hay fever. Moreover, the difference in the rising temperature rising rate of the excess water exothermic composition and the hydrous exothermic composition was 20 ° C./5 minutes.

(Example 24)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, 11% salt water-containing surplus water exothermic composition, a laminate of a polyethylene porous film and a nylon nonwoven fabric that is breathable Thickness having one rectangular through-hole using a base material made of a non-breathable sheet in which a pressure-sensitive adhesive layer with a separator is laminated on one side of a material and a polyethylene film and an ethylene-vinyl acetate copolymer film is laminated on the other side Using a 3 mm thick mold, the exothermic composition molded body obtained by molding the excess water exothermic composition through a mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film surfaces were mutually bonded. The covering material is covered so as to be laminated, and the peripheral portion of the exothermic composition molded body is heat-sealed, cut, and has a single exothermic part having a length of 115 mm and a width of 73 mm consisting of one exothermic part, An exothermic precursor having a peripheral seal width of 6 mm and a length of 85 mm and a width of 73 mm was prepared. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes.

Two outer packaging materials with a size of 124 mm are overlapped so that the surfaces having heat-fusibility are inside, and the periphery is heat-fused to form a bag, and the heat-generating precursor is sealed. A plurality of outer bag-encapsulated exothermic precursors were prepared. The moisture permeability of the outer bag was 1.1 g / (m ² · day).

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 150 days by natural storage to produce a single exothermic part heating element. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 24 ° C./5 minutes. The room temperature was 36 ° C. during the 150 days. Further, the heating element was taken out from the outer bag, fixed to clothes with the adhesive layer, and subjected to a heating test. However, it quickly became warm and the warm time lasted for 6 hours or more.

(Example 25)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) Using an excess water exothermic composition in which 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline are mixed, the base material is made of polyethylene anti-slip material / non-water-absorbing treatment Corrugated cardboard liner non-water-absorbent substrate was used.
A corrugated board liner in which the exothermic composition molded body obtained by molding the surplus water-containing exothermic composition through a mold using a mold having one full-foot-shaped through-hole and through-molding the excess water-containing exothermic composition. Laminated on the paper side, and further a laminated body of a porous film and a nylon nonwoven fabric, and a coating material provided with a breathable pressure-sensitive adhesive layer by a melt blow method on the porous film side is laminated, and the periphery of the exothermic composition molded body The part was crimped and sealed to produce an all-foot-shaped foot temperature exothermic precursor with a maximum length of 220 mm. The breathability of the coating material was 900 g / (m ² · day) in terms of moisture permeability by the Lissy method. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 6 ° C./5 minutes.

Two outer packaging materials having a size of 25 mm are superposed so that the surfaces having heat-fusibility are inside each other, the surroundings are heat-fused and formed into a bag shape, and the foot temperature exothermic precursor Was sealed to produce a plurality of outer bag-encapsulated foot temperature exothermic precursors. The moisture permeability of the outer bag was 2.8 g / (m ² · day).

The outer bag-encapsulated foot temperature exothermic precursor was held in a thermostatic bath at a temperature of 50 ° C. for 30 days to produce a foot temperature exothermic body having a maximum length of 220 mm. The heating element had a water-containing heating composition having an excess water value of 0 and a rising temperature rising rate of 35 ° C./5 minutes.
The minimum bending resistance of the full-foot-shaped foot temperature heating element that is not formed of the single heating part heating element and has no intermittent cuts was 220 mm or more. The foot temperature heating element was taken out from the outer bag and used, but the entire foot was sufficiently warmed up and the foot temperature heating element was not rounded in the shoe, which was very convenient for foot temperature use.

(Example 26)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a hydrous exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 20, there was no moldability, and the temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and the interval between the six segment heat-generating parts as the heat-seal area The heat generating part has a heat generating part of 77 mm long × 15 mm wide and a heat generating part of 77 mm long × 5 mm wide, the seal width of the peripheral part is 8 mm, and the heat generating precursor is 131 mm long × 93 mm wide. Created multiple bodies.

A packaging material having a moisture permeability of 1.1 g / (m ² · day) was used as a packaging material for outer bags. Using two of the packaging materials having a size of 230 mm × 125 mm, the surfaces having heat-fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor prepared as described above is held in a thermostatic bath at a temperature of 50 ° C. for 30 days, and a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 24 ° C./5 min. A plurality of heating elements were obtained. The heating element is provided at intervals, with the six divided heat generating portions being the heat sealing region, and the divided heat generating portions are 77 mm long × 15 mm wide, and the divided portions are 77 mm long × 5 mm wide. The peripheral seal width is 8 mm, and the length is 131 mm × width 93 mm. The heating element was taken out from the outer bag and the physical properties were measured. The loop stiffness of the heating element storage body was 98 mN / cm. The minimum bending resistance was 48 mm, and the change in minimum bending resistance was 0. Further, the heating element was taken out from the outer bag and fixed to the waist with the adhesive layer, and the heat generation test was carried out, but it was fixed tightly along the waist and became warm immediately, and the warm time continued for 6 hours or more. The heating element had excellent heat generation performance and excellent flexibility, had a good feeling in use, and was a practical heating element.

(Comparative Example 4)
A plurality of heating elements similar to those in Example 7 were prepared except that the loop stiffness of the storage body was set to 1000 mN / cm. The heating element was taken out from the outer bag, fixed to the waist with the adhesive layer, and a heat test was conducted. However, the heating element immediately became warm and the warm time lasted for 6 hours or more. However, the heating element did not follow the waist and was flexible. There was no heat-generating body which was unusable and impractical. The minimum bending resistance was not measurable.

(A) It is a top view which shows an example of a rectangular heating element. (B) It is sectional drawing of the AA. (A) It is a top view which shows an example of a hot spring heating element. (B) It is sectional drawing of the same BB. (C) It is sectional drawing which shows another example of a hot spring heating element. (A) It is a top view which shows an example of a foot temperature heating element. (B) It is sectional drawing of CC. (C) It is a top view which shows another example of a foot temperature heating element. (A) It is a top view which shows an example of a rigid soft heating element. (B) It is a top view which shows another example of a rigid soft heating element. (A) It is a top view which shows an example of a stripe heat generating body. (B) It is sectional drawing of the DD. (C) It is sectional drawing which shows another example of a stripe heat generating body. (D) It is sectional drawing which shows another example of a stripe heat generating body. (A) It is a top view which shows an example of a separable heating element. (B) It is a top view which shows an example of a small heat generating body. (C) It is a top view which shows another example of the separable heating element. (D) It is a top view which shows another example of a small heat generating body. (A) It is a top view which shows an example of an expansion-contraction heating element. (B) It is sectional drawing of the same EE. (A) It is a top view which shows another example of an expansion-contraction heating element. (B) It is a top view which shows another example of an expansion-contraction heating element. It is a top view which shows an example of a band heat generating body. (A) It is a top view which shows an example of a tunnel ventilation heat generating body. (B) It is sectional drawing of the FF. (A) It is a partial expanded sectional view which shows an example of the vicinity of the space part of a tunnel ventilation heat generating body. (B) It is a partial expanded sectional view which shows another example of the vicinity of the space part of a tunnel ventilation | gas_flowing heat generating body. (A) It is a top view which shows an example of a chemical | medical agent heating element. (B) It is sectional drawing of the same GG. (C) It is a top view which shows another example of a chemical | medical agent heating element. (D) It is sectional drawing which shows another example of a chemical | medical agent heating element. (A) It is a top view which shows another example of a chemical | medical agent heating element. (B) It is sectional drawing of HH. (A) It is a top view which shows an example of the separable medicine heating element. (B) It is sectional drawing of the II. (C) It is sectional drawing which shows an example of a small medicine heat generating body. (A) It is a top view which shows an example of a eye temperature heat generating body. (B) It is sectional drawing of the same JJ. (C) It is a top view which shows another example of a eye temperature heat generating body. (D) It is sectional drawing which shows another example of eye temperature heat generating body. (E) It is a top view which shows an example of a face temperature heating element. (F) It is a perspective view which shows another example of a face temperature heating element. (G) It is a top view which shows an example of a nasal temperature heating element. (H) It is a top view which shows another example of the tunnel ventilation heating element for face temperature heating elements and a nasal temperature heating element. (A) It is a top view which shows another example of the rigid soft heating element before being folded. (B) It is a top view which shows an example of the outer temporary attachment folding heating element with an outer bag. (C) It is sectional drawing of the same KK. (D) It is a top view which shows another example of the outer temporary attachment folding heat generating body with an outer bag. It is sectional drawing which shows the softness | flexibility of a rigid soft heating element. It is sectional drawing which shows an example of the non-flexibility of a single heat generating part heat generating body. (A) It is a top view which shows an example of the alternate cut which is a kind of intermittent cut. (B) It is a top view which shows an example of the perforation which is a kind of intermittent cut. (C) It is a top view which shows another example of the perforation which is a kind of intermittent cut. It is a top view which shows the filter paper which provided the reference line. It is a top view which shows a measuring apparatus. It is sectional drawing which shows operation. It is sectional drawing which shows a measurement. It is a top view which shows the filter paper which calculates a surplus water value. (A)-(d) is sectional drawing explaining moldability. (A)-(d) is sectional drawing explaining non-molding property.

Explanation of symbols

1 Heating Element 2 Single Heating Element Heating Element 2A Rectangular Heating Element 3 Warm Heating Element 4 Foot Temperature Heating Element 5 Division Heating Element Heating Element 5A Rigid Soft Heating Element 6 Stripe Heating Element
6A stripe heating element 7 separable heating element 7A small heating element
8 Elastic heating element 9 Band heating element 10 Tunnel ventilation heating element
DESCRIPTION OF SYMBOLS 11 Drug heating element 11A Separable medicine heating element 11B Small medicine heating element 12 Outer temporary folding folding heating element with outer bag 13 Excess water-containing exothermic composition 13A Exothermic composition molded body 14 Hydrous heating composition 15 Exothermic part 16 Division heating part 17 Separation part 18 Seal part 19 Adhesive layer 20 Breathable adhesive layer 21 Space part 22 Surface fastener 23 Separator 24 Cut part 25 Joint part 25A Indirect cut 26 Perforation 27 Alternate cut 28 Notch (V notch, U notch, I notch etc.)
29 Fixed part (adhesive layer, adhesive layer, heat seal layer, etc.)
30 Local ventilation material 31 Space portion 32 Ventilation hole 33 Ventilation blocking sheet 34 Handle 35 Packaging material (band)
36 outer bag 37 outer temporary attachment layer 38 seal part 39 folded heating element 40 filter paper 41 reference line 42 measuring plate (measuring plate having a cylindrical through hole)
43 Cylindrical through hole 44 Diameter of cylindrical through hole 45 Height of cylindrical through hole 46 Diameter circle of cylindrical through hole 47 Support plate 48 Filling plate 49 Holding plate 50 Non-water-absorbing plastic film (polyethylene film, etc.)
DESCRIPTION OF SYMBOLS 51 Penetration trace 52 Penetration distance 53 Heat generating composition 54 Coating material 55 Base material 56 Core material 57 Anti-slip material 58 Side ventilation part of a division | segmentation heating part 59 Top part of a division | segmentation heating part 60 Support stand 61 Type moldability measuring apparatus 62 Magnet 63 Excess water value measuring device 64 Eye heating element 65 Eye side 66 Texture material 67 Face temperature heating element 67A Nose temperature heating element 68 Mask 69 Heating element storage part 70 Heating element holding part 71 Ear hook part 72 Hole 73 Ear hook string, ear Hanging rubber

Claims (18)

An exothermic precursor having an exothermic part containing an excess water exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components and having an excess water value of 0.5 to 80, has a moisture permeability of 0. After being enclosed in an outer bag composed of a packaging material of 1 to 6.0 g / (m ² · day), it is selected from a natural environment that is not damaged and a controlled environment that has a holding temperature of 1 to 80 ° C. A hydrous exothermic composition having a surplus water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more by maintaining in a kind of environment and maintaining the holding period from 25 hours to 2 years. A method for producing a heating element, wherein the heating element is converted into a heating element. An exothermic precursor having a heat generating part containing the iron powder, carbon component, reaction accelerator and water as essential components and containing a surplus water exothermic composition having an excess water value of 0.5 to 80 has a moisture permeability of 0. ^{.1~6.0g / (m 2 · day)} , and an oxygen permeability after encapsulation in comprised outer bag from the packaging material is ^{0.05~10ml / (m 2 · day)} , not damaged By holding in a natural environment and a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C., and setting the holding period to 25 hours to 2 years, the surplus water value is 0, 2. The method for producing a heating element according to claim 1, wherein the heating element is converted into a heating element having a hydrous heating composition having a rising temperature rising rate of 12 ° C./5 minutes or more. An exothermic part containing an exothermic composition molded body in which the iron powder, carbon component, reaction accelerator, and water are essential components, and an excess water exothermic composition having an excess water value of 0.5 to 80 is molded by molding. The encapsulated exothermic precursor is sealed in an outer bag composed of a packaging material having a water vapor transmission rate of 0.1 to 6.0 g / (m ² · day), and then is maintained in a natural environment that is not damaged, and a holding temperature Is maintained in a kind of environment selected from 1 to 80 ° C. and a controlled humidity of 1 to 90%, and the retention period is 25 hours to 2 years, so that the surplus water value is 0, and The heating element production method according to claim 1, wherein the heating element is converted into a heating element having a hydrous exothermic composition having a rising temperature rising rate of 40 ° C / 5 minutes or more. An exothermic part containing an exothermic composition molded body in which the iron powder, carbon component, reaction accelerator, and water are essential components, and an excess water exothermic composition having an excess water value of 0.5 to 80 is molded by molding. The exothermic precursor provided is composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day). After being enclosed in the outer bag, the holding period is maintained in a kind of environment selected from a natural environment not damaged and a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%. The heating element is converted to a heating element having a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or longer by adjusting the temperature to 25 hours to 2 years. The manufacturing method of the heat generating body of 1.   It is manufactured by the method for manufacturing a heating element according to claim 1, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, a surplus water value of 0, and a rising temperature rising rate of 12 ° C./5. A heating element characterized by having a hydrous exothermic composition of at least minutes.   It is manufactured by the method for manufacturing a heating element according to claim 1, wherein iron powder, a carbon component, a reaction accelerator and water are essential components, the surplus water value is 0, and the rising temperature rising rate is 12 ° C. / Heat-containing exothermic composition of 5 minutes or more, and a plurality of sectioned heat-generating part regions and sectioned parts are integrated, and at least a part is provided with a breathable container, and the sectioned heat-generating part in which the water-containing heat-generating composition is stored The divided heat generating portion that is a region and the divided portion that is a non-contained region of the heat generating composition are integrated, and a plurality of divided heat generating portions are provided at intervals, with at least a part having air permeability. And at least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less, and has flexibility based on a structural flexible function and an articulated flexible function. Claim The heating element according to 5.   At least one loop stiffness in the longitudinal direction across the section heating section region and the section of the container is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width. The heating element according to claim 6, wherein the elongation at break at 25 ° C. is 5% or more and has flexibility based on a structural flexible function and an articulated flexible function.   At least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the storage body is 700 mN / cm or less, and at least one loop stiffness of the divided portion is 700 mN / cm or less. The heating element according to any one of claims 6 to 7.   The intermittent heating is provided in at least one section of the heating element having at least one loop stiffness of 700 mN / cm or less in the longitudinal direction across the section heating section region and the section of the storage body. The heating element according to any one of claims 6 to 8.   At least a part of each section heat generating portion of the heat generating body having at least one loop stiffness in the longitudinal direction crossing the section heat generating section region and the section of the storage body is 700 mN / cm or less is covered with a local ventilation material, and the section heat generating section A ventilation part, a partition part, and a space part surrounded by a local ventilation material are provided, and ventilation to the exothermic composition is performed from at least a side ventilation part facing the space part of the partition heating part. The heating element according to any one of 6 to 9.   At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less, the minimum bending resistance of the heating body is 70 mm or less, and the minimum bending resistance change is The heating element according to claim 6, wherein the heating element is −95 to 0.   12. At least one loop stiffness in a longitudinal direction crossing a section heating portion area of a storage body constituting a heating element after the end of heat generation and a section section which is a seal area is 700 mN / cm or less. The heating element according to any one of the above.   The heating element is at least one selected from a single heating part heating element, a rectangular heating element, a warm heating element, and a foot heating element, and each heating element is at least partially breathable, and the heating element The hydrous exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, the surplus water value is 0, and the rising temperature rise rate is 12 ° C / 5 minutes or more. Item 6. The heating element according to Item 5.   The heating element according to claim 13, wherein the foot temperature heating element does not have intermittent cuts, has a full foot shape, and has a minimum bending resistance of 200 mm or more.   The heating element is a segment heating part heating element, a rigid soft heating element, a stripe heating element, a detachable heating element, an expansion heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, a detachable tunnel ventilation heating element, a separation It is at least one selected from a flexible drug heating element, eye temperature heating element, face temperature heating element (nasal temperature heating element), and outer temporary folding heating element with an outer bag. And at least a part of the container is provided with an air-permeable storage body, and a classification heat generation part which is a classification heat generation part area in which the water-containing heat generation composition is stored and a classification non-storage area of the heat generation composition. Parts are integrated, and a plurality of divided heat generating parts are provided at intervals with the divided parts as an interval, and at least a part of each has a water-containing heat generating composition of a heat-generating element having air permeability, such as iron powder, carbon component, reaction accelerator Water required And the excess water value is 0, the rising temperature rise rate is 12 ° C./5 minutes or more, and at least one loop in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body of each heat generating element The stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, and the minimum heating element The heat generation according to claim 6, characterized by having a flexibility based on a structural flexibility function and an articulation flexibility function, wherein the bending resistance is 70 mm or less, and the minimum bending resistance change is -95 to 0. body.   It is manufactured by the method for manufacturing a heating element according to claim 3 or 4, comprising iron powder, a carbon component, a reaction accelerator and water as essential components, a surplus water value of 0, and a rising temperature rising rate of 40 ° C / 5. A heating element characterized by having a hydrous exothermic composition of at least minutes.   A water-containing heat generating composition and a plurality of divided heat generating portion regions having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more And at least a part of the container is provided with an air-permeable storage body, and a classification heat generation part which is a classification heat generation part area in which the water-containing heat generation composition is stored and a classification non-storage area of the heat generation composition. The section is integrated, and a plurality of section heat generating sections are provided at intervals with the section section as an interval, and at least a part is air permeable, and the longitudinal direction crossing the section heat generating section region and the section section of the container Structural flexibility and joint flexibility, wherein at least one loop stiffness is 700 mN / cm or less, the heating element has a minimum bending resistance of 70 mm or less, and a minimum bending resistance change is -95 to 0 Flexibility based on functionality The heating element according to claim 16, characterized by. The iron powder, carbon component, reaction accelerator and water are essential components, and the heating element having a hydrous heat generating composition with an excess water value of 0 has a moisture permeability of 0.1 to 6.0 g / (m ² · day). The heating element according to any one of claims 5 to 17, wherein the heating element is enclosed in an outer bag made of a packaging material.