JP7181025B2 - heating tool - Google Patents

Description

The present invention relates to a heating device.

Conventionally, there has been used a heating tool that contains an oxidizable metal such as iron powder, an electrolyte such as sodium chloride, and water, and utilizes reaction heat generated by an oxidation reaction of the oxidizable metal. Such a heating tool is widely favored and used in various situations because it is lightweight and can easily provide a heating effect and a feeling of relaxation.

For example, Patent Literature 1 discloses an alpha wave enhancer that increases the appearance of alpha waves by supplying hot steam to the eye area.

On the other hand, when using reaction heat generated by the oxidation reaction of oxidizable metals such as iron powder, it is necessary to control the oxidation reaction so as not to cause problems such as abnormal acceleration of heat generation. Document 2 discloses a technique of specifying the content of a water-absorbing agent, the mass ratio between water and the water-absorbing agent, and the blending amount of water from the viewpoint of preventing troubles such as abnormal heat generation.

Japanese Patent Application Laid-Open No. 2002-143203 JP 2013-146555 A

In recent years, heating tools are sometimes used before going to bed. Therefore, the present inventors conducted studies to improve the function of the heating tool used before going to bed, and made a new attempt to improve the ease of falling asleep with the heating tool, which is different from Patent Documents 1 and 2. , we found that the feeling of effect obtained differs depending on the heat generation profile of the heating device. Furthermore, as a result of further studies based on such knowledge, it was found that a heating device having a heating profile that satisfies specific conditions, which is different from the conventional technology such as Patent Documents 1 and 2, significantly improves the ability of the wearer to fall asleep. , found that the unexpected effect of improving the vitality after awakening can be obtained, and completed the invention.

That is, the present invention
a heat-generating portion containing an oxidizable metal, a water-absorbing agent, and water;
a container housing the heat generating part and having air permeability on at least one surface;
To provide a heating tool which has a heating element containing and satisfies the following conditions.
Conditions: When measuring the temperature in an environment with a room temperature of 20° C. and a humidity of 50%, after the heating element starts generating heat, the heating device located on the other side of the housing body and facing the heat generating region. After the surface temperature (°C) reaches the maximum temperature, the average change rate of the surface temperature (°C) of the heating tool until the surface temperature (°C) reaches 45°C is -1.0°C/min or more, -0 .5°C/min or less.

ADVANTAGE OF THE INVENTION According to this invention, the heating tool which can improve the quality of falling asleep, and can improve the vitality after waking up can be provided.

1 is a plan view of a heating tool according to an embodiment; FIG. 1 is an exploded perspective view of a heating tool according to an embodiment; FIG. 1 is a plan view schematically showing a heating element according to an embodiment; FIG. 1 is a cross-sectional view schematically showing a heating element according to an embodiment; FIG. 1 is a cross-sectional view schematically showing a heating element according to an embodiment; FIG. FIG. 4 is a diagram showing heat generation profiles obtained in Examples and Comparative Examples.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in all the drawings, the same constituent elements are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.
In this embodiment, "air permeability" is a value measured according to JIS P8117, and is defined as the time required for 100 ml of air to pass through an area of 6.45 cm ² under constant pressure. The "breathability" can be measured with an Oken type air permeability meter or a measuring instrument based thereon. That is, high air permeability means that it takes time for air to pass through, that is, low air permeability. Conversely, low air permeability means high air permeability.
In addition, in the present embodiment, the “basis weight” means the mass per unit area of the heating tool in plan view.

[Warmware]
First, an example of the heating tool 50 according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a plan view of a heating tool, and FIG. 2 is an exploded perspective view of the heating tool.
The heating tool 50 according to the present embodiment is a so-called eye mask type, in which a pair of heating elements 100 cover the user's eyes and eyelids, respectively, and apply steam heated to a predetermined temperature to the eyes and the surrounding area. It is used to

As shown in FIG. 1, the heating implement 50 has a body portion 51 and an ear hook portion 52 formed with a hole 54 into which the ear is inserted.
The body portion 51 has a laterally long shape having a longitudinal direction X and a width direction Y orthogonal thereto. The body portion 51 has, for example, a substantially oval shape. A pair of ear hooks 52 are used, and each ear hook 52 is attached to each end of the main body 51 in the longitudinal direction (X direction). The heating device 50 is worn so that the ear hooks 52 are hung on the user's ears and the main body 51 covers the user's eyes. Under this condition of use, steam heat generated from a heating element 100, which will be described later, is applied to the user's eyes. The heating tool 50 can further improve the comfortable feeling and the ease of falling asleep, which will be described later, by such steam heating.

FIG. 2 shows an exploded perspective view of the heating tool 50 before use. In FIG. 1, the ear hooks 52 are arranged at the top of the heating tool 50, and when used, the central part is cut off, left and right opened, and flipped outward to form the state shown in FIG.

The heating tool 50 of the present embodiment generates heat including a heat-generating part 10 containing an oxidizable metal, a carbon component, and water, and a container 20 containing the heat-generating part 10 and having air permeability on at least one surface. It has a body 100 and satisfies the following conditions.
Conditions: When measuring the temperature in an environment with a room temperature of 20° C. and a humidity of 50%, after the heating element 100 starts generating heat, the heating device 50 located on the other side of the container 20 and facing the heat generation area. After the surface temperature (°C) reaches the maximum temperature, the average change rate of the surface temperature (°C) of the heating tool 50 until the surface temperature (°C) reaches 45°C is -1.0°C/min or more, -0 .5°C/min or less.

The start of heat generation of the heating tool 50 is the time point when the oxidizable metal in the heating element 100 comes into contact with oxygen to initiate an oxidation reaction and generate heat accompanying the oxidation reaction. Further, the highest surface temperature (° C.) of the heating tool 50 is the highest temperature that the heating tool 50 reaches first after it starts generating heat.

In the heating device 50, the average rate of change under the above conditions is lower than that of the prior art, which means that the heating device 50 cools down relatively slowly from the maximum temperature to the specified temperature. As a result, a rapid temperature change from the maximum temperature is suppressed, a heat-retaining state is maintained, and the temperature is moderately decreased, so that a well-balanced thermal effect can be imparted throughout the use of the heating tool 50.例文帳に追加As a result, when the heating tool 50 is used at bedtime, the quality of falling asleep is improved. Although the specific mechanism of the relationship between the heat generation profile of the heating device 50 and the ease of falling asleep is not clear, when the heating device 50 is worn for a long time, for example, 10 minutes or more to warm the eyes, Rather than maintaining a constant temperature, it is presumed that gradually lowering the temperature will keep the warm feeling longer and make it easier to fall asleep. And the said relevance was found for the first time as a result of repeated studies by the present inventor. In addition, the ease of falling asleep means the effect of making the user feel that falling asleep is smooth and that the time until falling asleep is short. It can be expected that by falling asleep well, one can sleep deeply, feel refreshed when waking up, be able to work energetically after waking up, and be more likely to be active during the day.
In addition, by controlling the surface temperature of the other side of the container 20 of the heating tool 50, the heating effect of the entire heating tool 50, such as the exothermic reaction of the heat-generating part 10 and the sheet structure, is optimal for giving ease of falling asleep. is easier to apply around the eyes.

Regarding the above conditions of the heating device 50 of the present embodiment, the other surface side of the container 20 is the side of the second container sheet 202 described later, and the heat generating region is the heat generating section 10 described later. means the entire area covered. That is, in the heating implement 50, the position facing the heat generating region is the region facing the region where the heat generating section 10 is arranged in plan view. The surface of the heating tool 50 is the outermost surface of the sheets forming the heating tool 50 . In this embodiment, the surface of the heating tool 50 on the other side of the container 20 is the outer surface of the heat insulating sheet 60, which will be described later.
Hereinafter, "the surface temperature (° C.) of the heating tool 50 on the other side of the container 20 and facing the heat generating region" is also simply referred to as "the surface temperature (° C.) of the heating tool 50".

Also, in order to obtain a heating tool 50 having a heating profile that satisfies the above conditions, it is important to appropriately adjust and combine the following factors.
(1) The manufacturing method of the exothermic part 10 and the content of the oxidizable metal.
(2) air permeability of the container 20;
(3) Basis weight of the constituent material of the heating tool 50 .

More specifically, for example, when the coating method described later is used as the manufacturing method of the heat-generating part 10, the content of the oxidizable metal is increased by increasing the discharge pressure of the paint (heat-generating composition) per unit time. You can increase the amount. In addition, if the discharge pressure is increased, the shape retention cannot be maintained, and the paint tends to protrude from the surface to be applied. to apply the coating. As a result, it is possible to maintain the shape retention of the coated surface, and the heat generating portion 10 having stable heat generating characteristics can be obtained. However, the heating tool 50 is not limited to this manufacturing method. In addition, the air permeability of the container 20 makes it possible to control the amount of oxygen supplied to the exothermic part 10, the amount of steam emitted from the exothermic part 10, the influence of the steam on the exothermic reaction, and the like. It is adjusted according to the content of In addition, since the heat retaining property of the heating tool 50 is controlled by the basis weight of the material forming the heating tool 50, it is preferable to control the basis weight of the heating tool 50 while maintaining a balance with air permeability.

Moreover, the heating tool 50 can further improve the quality of falling asleep and improve the vitality and concentration after waking up by providing the following configuration.

Under the above conditions, the maximum surface temperature of the heating tool 50 is preferably 60° C. or higher and 65° C. or lower.
By setting the temperature to 60°C or higher, it is possible to impart sufficient warmth to the eye area, facilitate the retention of the heat retention time, and slowly lower the temperature. As a result, the comfort of the wearer can be further strengthened, and the goodness of falling asleep can be improved.
On the other hand, by setting the temperature to 65° C. or less, excessive heating is suppressed, and a well-balanced thermal effect is obtained throughout the use of the heating tool 50, thereby more effectively improving the quality of falling asleep and waking up when waking up. is refreshing and can improve vitality.

In addition, the heating tool 50 has the air permeability (second/100 mL) of one surface of the container 20 (that is, the first sheet 201 of the container) and the basis weight (g/m ² ) of the content of the oxidizable metal. It is preferable to control the product of to be a numerical value of 1.4×10 ⁶ or more and less than 3.1×10 ⁶ . This numerical value is considered to be related to the degree of temperature drop (sustainability) in the latter half of the heating profile of the heating device 50 .
By setting the numerical value in such a range, the temperature drop rate can be reduced, a well-balanced thermal effect can be obtained throughout the use of the heating tool 50, and the ability to fall asleep and the vitality after waking up can be improved more effectively. can. The reason for this is that the higher the basis weight of the oxidizable metal remaining unreacted after reaching the maximum temperature after the heating tool 50 starts generating heat, the more easily the amount of steam generated in the latter half of the heating profile increases. In addition, the higher the air permeability of the first sheet 201 of the containing body, the lower the air permeability, preventing the generated steam from being released to the outside, and suppressing the decrease in temperature due to the reduction in the oxidation reaction. As a result, the amount of steam generated by the heating element 100 released to the outside becomes an appropriate amount to keep the inside of the heating element 100 warm and to give the desired temperature to the eyes, and a well-balanced state is maintained for a long time. It is considered that the change rate of the surface temperature of the heating tool 50 after the heating tool 50 reaches the maximum temperature can be adjusted within a desired range.
Specifically, in the heating device 50, the air permeability (sec/100 mL) of one surface of the container 20 (that is, the first sheet 201 of the container) and the basis weight of the oxidizable metal content (g/m ² ) is preferably 1.4×10 ⁶ or more, more preferably 1.45×10 ⁶ or more, and further preferably 1.5×10 ⁶ or more, from the above viewpoint. Preferably, it is more preferably 1.55×10 ⁶ or more.
In addition, the product of the permeability (sec/100 mL) of one surface of the container 20 and the basis weight (g/m ² ) of the oxidizable metal content is less than 3.1×10 ⁶ from the above viewpoint. It is preferably 2.7×10 ⁶ or less, more preferably 2.0×10 ⁶ or less, even more preferably 1.9×10 ⁶ or less.
That is, from the above viewpoint, the product of the air permeability (sec/100 mL) of one surface of the container 20 and the basis weight (g/m ² ) of the oxidizable metal content is 1.4×10 ⁶ or more. , preferably less than 3.1×10 ⁶ , more preferably 1.45×10 ⁶ or more and 2.7×10 ⁶ or less, and 1.5×10 ⁶ or more and 2.0×10 ⁶ It is more preferably 1.55×10 ⁶ or more and 1.9×10 ⁶ or less.

In addition, in the heating tool 50, the ratio of the basis weight (g/m ² ) of the oxidizable metal content to the air permeability (sec/100 mL) of one surface of the container 20 is, in other words, the container 20 It is the product of the reciprocal of the air permeability (sec/100 mL) of one surface (the container first sheet 201) and the basis weight (g/m ² ) of the oxidizable metal content.
The lower limit of the product of the reciprocal of the air permeability (sec/100 mL) of one surface of the container 20 (first container sheet 201) and the basis weight of the oxidizable metal content (g/m ² ) is 0. It is preferably 0.06 or more, while the upper limit is preferably 0.17 or less.
Further, the product of the reciprocal of the air permeability (sec/100 mL) of one surface of the container 20 (the first sheet 201 of the container) and the basis weight (g/m ² ) of the content of the oxidizable metal was 0. It is preferable to set it as the numerical range of 06 or more and 0.17 or less.
The product of the reciprocal of the air permeability (sec/100 mL) of one surface of the container 20 (the first sheet 201 of the container) and the basis weight of the oxidizable metal content (g/m ² ) is the heating tool 50 is considered to be involved in the maximum temperature in the exothermic profile of That is, since the maximum temperature of the heating tool 50 is proportional to the oxidation reaction rate of the oxidizable metal, it is important to control factors that contribute to the oxidation reaction rate. Therefore, the lower the air permeability of the container first sheet 201 is, the higher the air permeability becomes, and the oxygen content increases, thereby increasing the oxidation reaction speed. Moreover, the higher the content of the oxidizable metal, the higher the oxidation reaction rate. In other words, it is considered that the oxidation reaction progresses more actively as the reciprocal of the air permeability of the container first sheet 201 and the basis weight of the oxidizable metal content increase. Therefore, in the heating device 50, the reciprocal of the air permeability (sec/100 mL) of one surface of the container 20 (first container sheet 201) and the basis weight (g/m ² ) of the oxidizable metal content are By setting the product to a predetermined value, it becomes possible to control the maximum temperature reached within a preferable range, and accordingly, the rate of change of the surface temperature of the heating tool 50 is also set within an optimal range for better sleep. easier to take. As a result, the quality of falling asleep can be effectively improved, and the vitality after waking up can be easily improved.

Furthermore, under the above conditions, the heating tool 50 has a surface temperature of 1.0 minutes or more and 1.5 minutes after the heating tool 50 starts generating heat until the surface temperature of the heating tool 50 reaches 45°C from 35°C. minutes or less.
As a result, the heating element 100 can provide a warming effect immediately after the start of use of the heating tool 50, suppresses the feeling of cold immediately after the start of use of the heating tool 50, and can be used throughout the entire use of the heating tool 50. A well-balanced thermal effect can be obtained, and it is possible to more effectively improve the quality of falling asleep, and it is easy to improve the vitality after waking up. The reason for this is considered to be that it is preferable that the time required to apply sufficient heat to the eye area is short in order to make the wearer more comfortable and sleep better.

Note that the surface temperature of the heating tool 50 can be obtained by measuring the surface temperature of the heating tool 50 using a measuring instrument conforming to JIS S4100. Specifically, on the outermost surface of the heating tool 50, a temperature sensor is installed and fixed in the area facing the heat generating area on the other surface side of the container 20, and the heat generating element 100 starts to generate heat. Afterwards, the temperature is measured at 10 second intervals for 40 minutes. The temperature sensor is fixed, for example, by placing a weight of 500 g (for example, a perforated SUS plate) on a cushion made of a mesh agent.
In the present embodiment, it is the temperature of the outer surface of the heat insulating sheet 60, which will be described later, and the temperature of the area where the heat generating portion 10 is arranged in the plan view of the heating tool 50. FIG.
In addition, the measurement is performed under normal temperature (20° C.) and normal humidity (50%) environment.

In this embodiment, the case where the heating device 50 of the eye mask type and one side of the container 20 (the first sheet 201 of the container 20) is breathable has been described. is not limited to this. The heating tool of the present invention may be, for example, a heating tool that is applied to the body such as the back and waist, and the container may have air permeability on both sides.
In the case where both sides of the container are air permeable, it is preferable to control the air permeability of the container that faces the skin when the heating tool is used. Specifically, as described above, the air permeability (seconds/100 mL) of the container, which is the surface facing the skin when the heating tool is used, and the basis weight of the oxidizable metal content (g/m ² ) is preferably 1.4×10 ⁶ or more and 3.1×10 ⁶ or less. Furthermore, as described above, the product of the reciprocal of the air permeability (seconds/100 mL) of the container that faces the skin when the heating tool is used and the basis weight of the oxidizable metal content (g/m ² ) is preferably 0.06 or more and 0.17 or less.

[heating element]
The heating element 100 included in the heating tool 50 will be described.
In this embodiment, a pair of heating elements 100 are arranged in the heating tool 50, and each heating element 100 covers the user's eyes.

FIG. 3 is a plan view showing an example of the heating element 100 of this embodiment. 4 is a cross-sectional view taken along the line AA of FIG. 3. FIG. A heating element 100 of this embodiment has a heating part 10 containing an oxidizable metal, a carbon component, and water, and a housing 20 that houses this heating part 10 .

The heat-generating part 10 that constitutes the heat-generating body 100 will be described.
The heat-generating part 10 is made of a heat-generating composition containing an oxidizable metal, a carbon component, and water.
Specifically, the exothermic part 10 generates heat by an oxidation reaction of an oxidizable metal to impart a thermal effect, and has a performance of a heat generation temperature of 30° C. or more and 70° C. or less in a measurement conforming to JIS S4100. can use things. In addition, the heat-generating part 10 has an effect of generating water vapor by heating the water contained therein.

Oxidizable metals are metals that generate oxidation reaction heat, and examples thereof include powders and fibers of one or more metals selected from the group consisting of iron, aluminum, zinc, manganese, magnesium, and calcium. . Among them, iron powder is preferable from the viewpoints of handleability, safety, manufacturing cost, storage stability and stability. Examples of the iron powder include one or more selected from the group consisting of reduced iron powder and atomized iron powder.

The oxidizable metal preferably has an average particle diameter of 10 μm or more, more preferably 15 μm or more, and still more preferably 20 μm or more when powdered, from the viewpoint of efficient oxidation reaction. . From the same point of view, the average particle size of the oxidizable metal is preferably 200 μm or less, more preferably 180 μm or less, and even more preferably 150 μm or less.
The average particle diameter of the oxidizable metal is the arithmetic mean diameter of the maximum length in the form of powder, and can be measured by classification with a sieve, dynamic light scattering method, laser diffraction method, etc. However, it is preferable to measure by a laser diffraction method.

The content of the oxidizable metal in the exothermic part 10 is such that the surface temperature of the heating tool 50 can be raised to a desired temperature at which the warm feeling due to the rise of the warm feeling can be obtained most without becoming too hot. From the viewpoint of keeping the change in the surface temperature of the tool 50 within a desired range, giving the wearer a comfortable feeling for a long time, further improving the wearer's ability to fall asleep, and improving the vitality after waking up, it is expressed in basis weight. is preferably 250 g/m ² or more, more preferably 300 g/m ² or more, even more preferably 350 g/m ² or more, and even more preferably 370 g/m ² or more. Also, from the same point of view, the content of the oxidizable metal in the heat generating portion 10 is preferably 1,200 g/m ² or less, more preferably 900 g/m ² or less, and still more preferably 650 g/m 2 or less. ² or less, and more preferably 540 g/m ² or less.
The content of the oxidizable metal in the heat-generating portion 10 can be determined by an ash content test according to JIS P8128 or by a thermogravimetry. In addition, it can be quantified by a vibrating sample type magnetization measurement test or the like using the property that magnetization occurs when an external magnetic field is applied. Among them, it is preferable to obtain the value by a thermogravimetry.

The carbon component has water retention capacity, oxygen supply capacity, and catalytic capacity, and for example, one or more materials selected from the group consisting of activated carbon, carbon black, acetylene black, and graphite are used. can be done. Among them, activated carbon is preferably used because it easily adsorbs oxygen when wet. More preferably, one or two or more fine powders or small granules selected from the group consisting of coconut shell charcoal, wood powder charcoal, and peat charcoal are used. Wood powder charcoal is more preferable from the viewpoint of easily increasing the surface temperature of the heating element 100 to a desired temperature.

From the viewpoint of being uniformly mixed with the oxidizable metal, the carbon component preferably has an average particle size of 10 μm or more, more preferably 12 μm or more, and still more preferably 15 μm or more. From the same viewpoint, the average particle size of the carbon component is preferably 200 μm or less, more preferably 150 μm or less, and even more preferably 100 μm or less.
The average particle diameter of the carbon component is the arithmetic average diameter of the maximum length in the form of powder, and can be measured by dynamic light scattering method, laser diffraction method, etc. Among them, it is measured by laser diffraction method. preferably. Although it is preferable to use a carbon component in a powdery form, it is also possible to use a form other than the powdery form, for example, a fibrous form.

The content of the carbon component in the heat generating part 10 is preferably 1 part by mass or more, more preferably 3 parts by mass or more, and still more preferably 6 parts by mass with respect to 100 parts by mass of the content of the oxidizable metal. Department or above. In addition, the content of the carbon component in the exothermic part 10 is preferably 40 parts by mass or less with respect to 100 parts by mass of the content of the oxidizable metal, from the viewpoint of sufficiently obtaining oxygen supply to the exothermic part 10. Yes, more preferably 15 parts by mass or less, and still more preferably 12 parts by mass or less.
The content of the carbon component in the heat generating portion 10 is preferably 10 g/m ² or more, more preferably 20 g/m ² or more, still more preferably 25 g/m 2 or more, in terms of basis weight. ² or more. Also, the content of the carbon component is preferably 400 g/m ² or less, more preferably 250 g/m ² or less, and still more preferably 120 g/m ² or less, in terms of basis weight.

The content of water in the heat-generating part 10 is controlled so that the oxidation reaction of the oxidizable metal progresses favorably, so that the temperature rises quickly and gives a comfortable feeling of warmth, and the amount of heat generated and the amount of water vapor generated are controlled. From the viewpoint of improving the vitality after waking up by giving an appropriate temperature change to the eyes and improving sleep, it is preferably 20 parts by mass or more, more preferably 30 parts by mass with respect to 100 parts by mass of the oxidizable metal. or more, more preferably 40 parts by mass or more. The content of water in the exothermic part 10 is preferably 100 parts by mass or less, more preferably 90 parts by mass or less with respect to 100 parts by mass of the oxidizable metal, from the viewpoint of keeping the maximum temperature at a certain temperature or higher. and more preferably 80 parts by mass or less. A portion of the water in the heat-generating part 10 becomes water vapor due to the temperature rise associated with the heat generated by the oxidation reaction of the oxidizable metal.
The water content in the heating tool 50 is preferably 150 g/m ² or more, more preferably 180 g/m ² or more, and still more preferably 200 g/m ² or more, in terms of basis weight. . Also, the moisture content, expressed as basis weight, is preferably 600 g/m ² or less, more preferably 400 g/m ² or less, and even more preferably 350 g/m ² or less.

Moisture is retained in the heat-generating part 10, and the oxidation reaction of the oxidizable metal proceeds quickly and continuously, so that the temperature rises quickly and gives a comfortable feeling of warmth. can be controlled and a water-absorbing agent can be included from the viewpoint of improving the vitality after waking up by giving an appropriate temperature change to the eye area and improving falling asleep. As the water-absorbing agent, a water-absorbing polymer, a water-absorbing powder, or the like can be used.
Examples of water-absorbing polymers include hydrophilic polymers having a cross-linked structure that can absorb and retain liquid 20 times its own weight. Examples of water-absorbing powders include vermiculite, sawdust, silica gel, and pulp powder. One or two or more powders selected from the group consisting of When the water-absorbing agent is contained, the content is preferably 2 parts by mass or more, preferably 20 parts by mass or less, and 15 parts by mass or less with respect to 100 parts by mass of water in the heat-generating part 10. is more preferable.

The exothermic part 10 can further contain a reaction accelerator. By containing the reaction accelerator, the oxidation reaction of the oxidizable metal can be easily sustained. In addition, by using a reaction accelerator, the oxidation reaction can be promoted by destroying the oxide film formed on the oxidizable metal accompanying the oxidation reaction. The reaction accelerator includes, for example, one or more materials selected from the group consisting of alkali metals, alkaline earth metal sulfates, and chlorides. Among them, the group consisting of various chlorides such as sodium chloride, potassium chloride, calcium chloride, magnesium chloride, ferrous chloride, and ferric chloride, and sodium sulfate, from the viewpoint of excellent conductivity, chemical stability, and production cost. It is preferable to use one or more materials selected from.

The content of the reaction accelerator in the exothermic part 10 raises the temperature to an appropriate temperature range where a warm feeling can be obtained, and by this, an appropriate temperature change is given to the eyes for a long period of time, thereby further improving the ability to fall asleep. From the viewpoint of improving the vitality after waking up, it is preferably 1 part by mass or more, more preferably 3 parts by mass or more, and still more preferably 6 parts by mass with respect to 100 parts by mass of the content of the oxidizable metal. Department or above.
From the same point of view, the content of the reaction accelerator in the exothermic part 10 is preferably 25 parts by mass or less, more preferably 20 parts by mass or less with respect to 100 parts by mass of the content of the oxidizable metal. and more preferably 15 parts by mass or less.

In the present embodiment, the heat-generating portion 10 is sheet-like, but the heat-generating portion 10 may be powder-like or sheet-like. It is preferable that the heating tool 50 is in the form of a sheet from the viewpoint of excellent usability.

The sheet-like heat generating portion 10 may be manufactured by wet papermaking of the heat generating composition, sandwiching the heat generating composition between base materials such as paper, and coating the heat generating composition on a base material such as paper. and those obtained by consolidating the exothermic composition by pressing or the like. Among them, the heat-generating part 10 is preferably made by wet paper-making a heat-generating composition, or by applying the heat-generating composition to a base material such as paper, because it is excellent in use feeling and can be easily manufactured. preferable.

When a coating method is adopted as the manufacturing method of the heat generating part 10, the coating method is not particularly limited, and for example, die coating, roll coating, screen printing, roll gravure, knife coating, curtain coater, etc. are used. be able to.

The thickness of the heat generating portion 10 is preferably 0.2 mm or more, more preferably 0.4 mm or more, and still more preferably 0.5 mm or more. On the other hand, the thickness of the heat generating portion 10 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. By setting the thickness of the heat-generating portion 10 within the above range, the heat-generating effect can be enhanced, and the size of the heat-generating body 100 can be made easy to use. In addition, the thickness of the heat generating portion 10 indicates an average thickness.

The heat-generating part 10 can also contain surfactants, chemicals, flocculants, colorants, paper strength agents, pH control agents, bulking agents, and the like, as necessary, to the extent that the effects of the present invention are not impaired. .

Next, the container 20 that constitutes the heating element 100 will be described.
The housing body 20 has air permeability on at least one surface and houses the heat generating section 10 . For example, as shown in FIG. 4, the container 20 can be configured by bonding the peripheral edge portions 203 of two sheets (a first container sheet 201 and a second container sheet 202). That is, the container 20 has one surface composed of the container first sheet 201 and the other surface composed of the container second sheet 202 .

In this embodiment, the first container sheet 201 is positioned closer to the user's skin than the heat-generating portion 10, and the second container sheet 202 is positioned farther from the user's skin than the heat-generating portion 10. It is located.
In addition, the first sheet 201 of the containing body is preferably a sheet having excellent air permeability, while the second sheet 202 of the containing body is preferably a sheet having poor breathability, that is, a non-breathable sheet or a non-breathable sheet. Preferably.

Specifically, the air permeability of the first sheet 201 of the accommodation body quickly raises the temperature of the heating element to an appropriate temperature for further improving the quality of falling asleep, and quickly gives a comfortable feeling of warmth without delay. 10,000 seconds/100 mL or less is preferable from the viewpoint of maintaining a warm feeling, further improving the ability to fall asleep, and making it easier to give a favorable temperature change to the eyes for improving the vitality after waking up. , more preferably 7,000 seconds/100 mL or less, and even more preferably 6,000 seconds/100 mL or less.
On the other hand, the air permeability of the first sheet 201 of the containing body needs to be set at an appropriate speed so that the oxidation reaction in the heat-generating part 10 is too fast and the warm feeling is lost due to too much heat. From the viewpoint of suppressing the loss of warm and pleasant sensation due to sleep, further improving the ease of falling asleep and improving the vitality after waking up, it is preferably 100 seconds / 100 mL or more, more preferably 500 seconds / 100 mL or more, and further It is preferably 1,000 seconds/100 mL or more, and more preferably 3,000 seconds/100 mL or more.

As the container first sheet 201, a breathable sheet, a laminated sheet obtained by laminating a nonwoven fabric and a breathable sheet, a laminated sheet obtained by laminating a knitted fabric and a breathable sheet, or the like can be used.
As the air-permeable sheet, a resin-made porous sheet or a resin-made sheet having ventilation holes can be used. As the resin, for example, one or more of polyethylene, polypropylene and ethylene-vinyl acetate copolymer can be used. The porous resin sheet is obtained, for example, by molding a melt-kneaded mixture of a thermoplastic resin and an organic or inorganic filler incompatible with the thermoplastic resin into a film and stretching the film uniaxially or biaxially. and have a fine porous structure. As the resin sheet having ventilation holes, a non-breathable sheet or a non-breathable sheet with fine holes made with a needle or the like, or a breathable sheet with fine holes made with a needle or the like. is mentioned.
The thickness of the container first sheet 201 is preferably 5 μm or more and 200 μm or less.

On the other hand, the air permeability of the second container sheet 202 is lower than that of the first container sheet 201 from the viewpoint of effectively applying the water vapor generated in the heat generating part 10 to the user and further improving the ability to fall asleep. is preferred, and a non-breathable sheet is more preferred. When the second container sheet 202 has air permeability, specifically, the preferred air permeability is preferably 10,000 seconds/100 mL or more, and more preferably 20,000 seconds/100 mL or more.
In addition, the upper limit of the air permeability of the second sheet 202 of the containing body is not particularly limited. From the point of view, it is preferably 100,000 seconds/100 mL or less.

As the container second sheet 202, a material that is substantially impermeable to oxygen can be used. 1 type, or 2 or more types can be used.
The thickness of the container second sheet 202 is preferably 5 μm or more and 200 μm or less.

Furthermore, as shown in FIG. 2 , a heat insulating sheet 60 that covers the heating element 100 is arranged on the surface of the container 20 on the second container sheet 202 side. As a result, it is possible to suppress the influence of the temperature of the outside air on the heat generation profile of the heating device 50 while reducing the heat generated from the heating element 100 radiating to the outside of the heating device 50 . The heat insulating sheet 60 may cover at least part of the heating element 100 . Further, the heat insulating sheet 60 may also serve as the bag body 53 described later, especially the bag body second sheet 56 .

The basis weight of the heat insulating sheet 60 is preferably 30 g/m ² or more, more preferably 40 g/m ² or more, and is preferably 150 g/m ² or less, more preferably 140 g/m ² or less from the viewpoint of weight reduction. .
In the heating tool 50, the total basis weight from the other surface of the container 20 to the outermost layer of the heating tool 50 on the side opposite to the heat generating part 10 is the basis weight of the second sheet 202 of the container and the bag body. It is the total value of the basis weight of the second sheet 56 and the basis weight of the heat insulating sheet 60 . From the viewpoint of suppressing the influence of the outside air temperature on the heating profile of the heating tool 50 while reducing the release of heat generated from the heating element 100 to the outside of the heating tool 50, the total basis weight is: 40 g/m ² or more is preferable, and 70 g/m ² or more is more preferable. On the other hand, the total basis weight is preferably 300 g/m ² or less, more preferably 260 g/m ² or less, from the viewpoint of reducing the weight of the heating tool 50 and the like.
As the material of the heat insulating sheet 60, the same material as that of the second bag sheet 56, which will be described later, can be used.

[others]
As shown in FIGS. 1 and 2, the heating tool 50 has a bag 53 that houses the heating element 100 .
The bag body 53 has a first bag sheet 55 positioned closer to the user's skin surface and a second bag sheet 56 positioned farther from the user's skin surface. These first bag sheet 55 and second bag sheet 56 are provided so as to sandwich the heating element 100 .

The basis weight of each of the first bag sheet 55 and the second bag sheet 56 is 20 g/m ² from the viewpoint of preventing the inside from being seen through and from the viewpoint of heat retention, flexibility, thickness, and the like. 40 g/m ² or more is more preferable. Further, the basis weight of each of the first bag sheet 55 and the second bag sheet 56 is preferably 200 g/m ² or less, more preferably 110 g/m ² or less.

In addition, since the first bag sheet 55 applies the generated water vapor to the user, the second bag sheet 56 should both have air permeability in order to smoothly supply oxygen to the heating element 100 . preferable.
Specifically, the air permeability of the first bag sheet 55 and the second bag sheet 56 is preferably 6,000 sec/100 mL or less, more preferably 1,000 sec/100 mL or less, and is preferably 500 sec/100 mL or less. Second/100 mL or less is more preferable, and 0 second/100 mL is even more preferable.

As the first bag sheet 55 and the second bag sheet 56, for example, fiber sheets such as nonwoven fabric can be used. For example, one or more selected from needle-punched nonwoven fabrics, air-through nonwoven fabrics and spunbonded nonwoven fabrics can be used.

The first bag sheet 55 and the second bag sheet 56 have the same shape and are substantially oval. The outer shape of the first bag sheet 55 and the second bag sheet 56 forms the outer shape of the main body portion 51 . The bag body first sheet 55 and the bag body second sheet 56 are superimposed on each other, at least partly joined at their peripheral edges, and joined along the Y direction at the central part in the X direction, thereby forming the bag body 53 becomes. A hot-melt adhesive, for example, can be used to join the first bag sheet 55 and the second bag sheet 56 . Note that the heating element 100 may be fixed to the bag body 53 by an adhesive, a heat seal, or the like (not shown).

The bag body 53 is formed with substantially V-shaped notches 53A and 53B cut inward from the long sides along the Y direction at the central positions of the two long sides extending in the X direction. . The notch portions 53A and 53B differ in the degree of cut. The notch portion 53A is positioned between the user's eyebrows or in the vicinity thereof when the heating tool 50 is worn. The notch portion 53B is located at the bridge of the user's nose when the heating tool 50 is worn. Normally, the notch portion 53B has a larger cut than the notch portion 53A.

As shown in FIGS. 1 and 2, the heating tool 50 has ear hooks 52 . The ear hooks 52 are used to fix the heating device 50 to the user's face.
The ear hooking portion 52 of the heating tool 50 is arranged on the first bag sheet 55 as shown in FIG. 2 before use. When the heating tool 50 is to be used, the ear hooks 52 are turned outward to open. Before use, that is, in a state in which the left and right ear hooks 52 are positioned on the first bag sheet 55 , the contour formed by the left and right ear hooks 52 is the contour of the first bag sheet 55 . is almost the same as The same material as that of the bag body 53 can be used for the ear hook portion 52 .

Further, as shown in FIG. 5, the storage body 20 may be further housed in a second storage body 40 made of non-woven fabric, which is a sheet material with good texture, in order to enhance the feeling of use.

The second container 40 preferably comprises a sheet having a basis weight of 5 g/m ² or more, more preferably 10 g/m ² or more. In addition, it is possible to laminate the periphery of a sheet having a weight of preferably 200 g/m ² or less, more preferably 120 g/m ² or less. Among them, from the viewpoint of weight reduction, etc., a sheet having a basis weight of 20 g/m ² or more and 120 g/m ² or less is preferable.
In this case, the sum of the basis weights from the other surface of the container 20 to the outermost layer of the heating tool 50 on the side opposite to the heat generating part 10 is the basis weight of the second container sheet 202 and the second container. 40, the grammage of the second bag sheet 56, and the grammage of the heat insulating sheet 60.

Examples of the sheet forming the second container 40 include nonwoven fabric, knitted fabric, and the like.
The nonwoven fabric is manufactured using one or more types of fibers by an air-through method, a spunbond method, a needle punch method, a meltblown method, a card method, a heat fusion method, a hydroentanglement method, and a solvent bonding method. can use things. Among them, it is preferable to use a stretchable nonwoven fabric from the viewpoint of texture and elasticity. Nonwoven fabrics having stretchability are preferably nonwoven fabrics containing elastic fibers (eg, polyurethane, polyester) or three-dimensionally crimpable fibers as constituent fibers, and more preferably air-through nonwoven fabrics, spunbond nonwoven fabrics, needle-punched nonwoven fabrics, and the like.

Specific non-woven fabric materials include polyester such as PET (polyethylene terephthalate), PE (polyethylene), PP (polypropylene), polyolefin such as ethylene-propylene copolymer, polyamide, synthetic fibers including polyacryl, cellulose, silk. , cotton, wool, and the like; or one or more of these combined fibers.

Since the heating tool 50 of the present embodiment contains an oxidizable metal that is oxidized by oxygen, it is usually stored in an oxygen-blocking bag.

Although the embodiments of the present invention have been described above with reference to the drawings, these are examples of the present invention, and various configurations other than those described above can be adopted.

In relation to the above-described embodiments, the present invention further discloses the following heating implements or applications.

<1>
a heat generating portion containing an oxidizable metal, a carbon component and water;
a container housing the heat generating part and having air permeability on at least one surface;
A heating device comprising a heating element containing and satisfying the following conditions.
Conditions: When the temperature was measured in an environment with room temperature of 20° C. and humidity of 50%, after the heating element started to generate heat, the heating device located on the other side of the container and facing the heat generation area. After the surface temperature (°C) reaches the maximum temperature, the average change rate of the surface temperature (°C) of the heating tool until the surface temperature (°C) reaches 45°C is -1.0°C/min or more, -0 .5°C/min or less.
<2>
The heating tool according to <1>, wherein the maximum temperature is preferably 60°C or higher and 65°C or lower under the conditions.
<3>
<1> or <2>, wherein under the conditions, the time required for the surface temperature of the heating tool to reach 45° C. from 35° C. is preferably 1.0 minutes or more and 1.5 minutes or less; Heating device as described.
<4>
The product of the air permeability (sec/100 mL) of the one surface of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is preferably 1.4×10 ⁶ or more, 3 .The heating tool according to any one of <1> to <3>, which is less than 1×10 ⁶ .
<5>
The ratio of the basis weight (g/m ² ) of the content of the oxidizable metal to the air permeability (sec/100 mL) of the one surface of the container is preferably 0.06 or more and 0.17 or less. The heating tool according to any one of <1> to <4>.
<6>
The heating implement according to any one of <1> to <5>, wherein the air permeability of the one surface of the container is preferably 100 seconds/100 mL or more and 10,000 seconds/100 mL or less.
<7>
The heating implement according to any one of <1> to <6>, wherein the air permeability of the one surface of the container is more preferably 500 seconds/100 mL or more and 7,000 seconds/100 mL or less.
<8>
The heating tool according to any one of <1> to <7>, wherein the air permeability of the one surface of the container is more preferably 1,000 seconds/100 mL or more and 7,000 seconds/100 mL or less. .
<9>
The heating tool according to any one of <1> to <8>, wherein the air permeability of the one surface of the container is more preferably 3,000 seconds/100 mL or more and 6,000 seconds/100 mL or less. .
<10>
Any one of <1> to <9>, wherein the content of the oxidizable metal is preferably 250 g/m ² or more and 1,200 g/m ² or less per unit area of the heat generating portion in plan view. The heating device described in .
<11>
Any one of <1> to <10>, wherein the content of the oxidizable metal is preferably 350 g/m ² or more and 650 g/m ² or less per unit area in plan view of the heat generating portion. The heating device described in .
<12>
Any one of <1> to <11>, wherein the content of the oxidizable metal is preferably 370 g/m ² or more and 540 g/m ² or less per unit area in plan view of the heat generating portion. The heating device described in .
<13>
<1> The total basis weight from the other surface of the container to the outermost layer of the heating tool on the side opposite to the heat generating part is preferably 40 g/m ² or more and 300 g/m ² or less. The heating tool according to any one of <12>.
<14>
Preferably, the heating device according to any one of <1> to <13>, further comprising a heat insulating material covering the heating element on the other surface of the container.
<15>
The air permeability of the other surface of the container is preferably 10,000 seconds/100 mL or more, preferably 20,000 seconds/100 mL or more, according to any one of <1> to <14>. Warmer.
<16>
The heating implement according to any one of <1> to <15>, wherein the air permeability of the other surface of the container is preferably 20,000 sec/100 mL or more.
<17>
The heating device <18> according to any one of <1> to <16>, wherein the other surface of the container is preferably air-impermeable.
a heat generating portion containing an oxidizable metal, a carbon component and water;
a container housing the heat generating part and having air permeability on at least one surface;
comprising a heating element comprising
The product of the air permeability (sec/100 mL) of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.4×10 ⁶ or more and less than 3.1×10 ⁶ . There is a heater.
<19>
The description in <18>, wherein the ratio of the basis weight (g/m ² ) of the content of the oxidizable metal to the air permeability (sec/100 mL) of the container is 0.06 or more and 0.17 or less. warmer.
<20>
The heating implement according to <18> or <19>, wherein the content of the oxidizable metal is 250 g/m ² or more and 1200 g/m ² or less in a plan view of the heating portion.
<21>
The heating implement according to any one of <18> to <20>, wherein one surface of the container preferably has an air permeability of 100 seconds/100 mL or more and 10,000 seconds/100 mL or less.
<22>
The heating implement according to any one of <18> to <21>, wherein one surface of the container preferably has an air permeability of 500 seconds/100 mL or more and 7,000 seconds/100 mL or less.
<23>
The heating implement according to any one of <18> to <22>, wherein one surface of the container preferably has an air permeability of 1,000 seconds/100 mL or more and 7,000 seconds/100 mL or less.
<24>
The heating implement according to any one of <18> to <23>, wherein one surface of the container preferably has an air permeability of 3,000 seconds/100 mL or more and 6,000 seconds/100 mL or less.
<25>
The product of the air permeability (sec/100 mL) of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.45×10 ⁶ or more and 2.7×10 ⁶ or less. The heating tool according to any one of <17> to <24>.
<26>
The product of the air permeability (sec/100 mL) of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.5×10 ⁶ or more and 2.0×10 ⁶ or less. The heating tool according to any one of <18> to <25>.
<27>
The product of the air permeability (sec/100 mL) of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.55×10 ⁶ or more and 1.9×10 ⁶ or less. The heating tool according to any one of <18> to <26>.
<28>
The content of moisture in the heat-generating part is preferably 150 g/m ² or more, more preferably 180 g/m ² or more, and still more preferably 200 g/m ² or more, in terms of basis weight. , 600 g/m ² or less, more preferably 400 g/m ² or less, and even more preferably 350 g/m ² or less, according to any one of <11> to <27>.
<29> The exothermic part contains an absorbent, and the content of the water absorbing agent is preferably 2 parts by mass or more and preferably 20 parts by mass or less with respect to 100 parts by mass of water in the exothermic part, The heating implement according to any one of <18> to <28>, which is more preferably 15 parts by mass or less.
<30>
The heating tool according to any one of <18> to <29>, wherein the air-permeable surface of the container faces the skin.
<31>
The heating implement according to any one of <1> to <30>, wherein the heating implement emits steam.
<32>
a heat generating portion containing an oxidizable metal, a carbon component and water;
a container housing the heat generating part and having air permeability on at least one surface;
comprising a heating element comprising
The product of the air permeability (sec/100 mL) of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.4×10 ⁶ or more and less than 3.1×10 ⁶ . can be,
The ratio of the basis weight (g/m ² ) of the content of the oxidizable metal to the air permeability (sec/100 mL) of the container is 0.06 or more and 0.17 or less,
A heating tool, wherein one surface of the container has an air permeability (sec/100 mL) of 3,000 sec/100 mL or more and 6,000 sec/100 mL or less.
<33>
The heating tool according to any one of <1> to <32>, wherein the heating tool is an eye mask type.
<34>
Use of the heating tool according to any one of <1> to <17> for improving falling asleep by applying the heating tool to the eyes.
<35>
Use of the heating tool according to any one of <18> to <33> for improving falling asleep by applying the heating tool to the eyes.
<36>
A method for improving sleep, comprising:
a step of applying the heating tool according to any one of <1> to <33> to the eye for 5 minutes or more;
going to bed after or during the application of the heating device.

The present invention will be described in more detail below with reference to examples. However, the scope of the invention is not limited to such examples.

Examples and Comparative Examples Heating implements having the configurations shown in Fig. 1 and Table 2 were produced according to the following procedure.

<Fabrication of heat-generating portion>
Wood pulp paper (20 g/m ² , manufactured by Inogami Co., Ltd.) and water-absorbent polymer (sodium polyacrylate, spherical, average particle size 300 μm, 50 g/m ² , Aqualic CA, manufactured by Nippon Shokubai Co., Ltd.) A polymer sheet formed by laminating wood pulp paper (30 g/m ² , manufactured by Inogami Co., Ltd.) was used as the base material.
A coating material having a composition shown in Table 1 below was applied to one side of the base material by a die coating method while adjusting the discharge pressure to prepare a sheet-like coating material. The ejection pressure was adjusted so that the basis weight of the iron powder was the value shown in Table 2.
After that, the obtained sheet-like coated material was cut into a size of 49 mm × 49 mm, and 0.089 g of salt (pharmaceutical sodium chloride (manufactured by Otsuka Pharmaceutical Co., Ltd.)) was evenly sprinkled on the coated surface. An exothermic part 10 was produced.

<Preparation of heating element>
A heating element having the form shown in FIG. 4 was produced according to the following procedure.
Using the container first sheet and the container second sheet shown in Table 2, the heat-generating part was sandwiched between the container first sheet and the container second sheet and joined at the peripheral edge to obtain a heat generating element. rice field.
The heating element was stored in an oxygen-blocking bag until it was evaluated as described later.

<Preparation of heating tool>
Using two of the heating elements obtained above, an eye mask-shaped heating tool shown in FIG. 1 was produced. As the first sheet of the bag body, polypropylene nonwoven fabric (needle punch method) with a basis weight of 80 g / m ² , as the second sheet of the bag body, cellulose / polyolefin composite fiber with a basis weight of 71 g / m ² (heat fusion method) As the sheet 60, a polyethylene terephthalate nonwoven fabric (air-through method) having a basis weight of 30 g/m ² was used.

The following measurements and evaluations were performed on the obtained heating tool. Table 2 shows the results. Measured heat generation profiles of Example 4 and Comparative Examples 1 and 3 are shown in FIG.
The heating tool of Comparative Example 1 corresponds to the prior art.

[Measurement of surface temperature]
The temperature was measured in an environment of room temperature 20° C. and humidity 50%. Using a measuring machine conforming to JIS S4100, the first sheet of the bag body (the side facing the user's skin) of the heating tool is placed outside, and the side opposite to the skin side (the heat insulating sheet) is the heat-generating part. A temperature sensor was installed and fixed in the area where it was placed.
The temperature sensor was fixed to the measurement surface with a mesh material (made of polyester, double raschel fabric with a thickness of 8 mm) and a SUS plate (500 g perforated plate).
After opening the oxygen-blocking bag containing the heating tool, the temperature was measured at intervals of 10 seconds for 40 minutes, and the temperature was measured.
Furthermore, the following numerical values were calculated from the obtained exothermic profile.
・Average rate of change (°C/min): After the surface temperature (°C) of the heating element reaches the maximum temperature after the heating element starts generating heat, the average rate until the surface temperature (°C) of the heating element reaches 45°C Average rate of change of surface temperature.
・Maximum temperature (°C): The temperature when the surface temperature (°C) of the heating tool reaches the maximum temperature after the heating element starts to generate heat.
- Heating time (minutes): Time required for the surface temperature of the heating tool to reach 45°C from 35°C after the heating element starts to generate heat.

[evaluation]
Ten skilled panelists appropriately applied the heating device for 30 minutes before sleep, evaluated the following evaluation items based on each criterion, and evaluated the average of the obtained evaluations and values. The results are shown in Table 2. In addition, evaluation shows that it is so favorable that a numerical value is low.
・Comfort 1: Very comfortable 2: Comfortable 3: Somewhat comfortable 4: Neither 5: Somewhat uncomfortable 6: Unpleasant 7: Very uncomfortable ・Sleep comfort 1: Falling asleep was stronger than when not wearing the mask.
2: Falling asleep was significantly improved compared to when not wearing.
3: Felt that falling asleep was slightly improved compared to when not wearing the mask.
4: Same as when not worn.
5: It became impossible to fall asleep more than when not wearing.
・Awakening after waking up ・Vitality 1: I was able to wake up more refreshed than when I was not wearing the mask, and I was able to work enthusiastically during the day without getting tired.
2: Same as when not worn.
3: I woke up worse than when I did not wear it, and felt tired and unmotivated during the day.

10 Exothermic part 20 Container 40 Second container 50 Heating device 51 Body part 52 Ear hook part 53 Bag body 53A Notch part 53B Notch part 54 Hole 55 Bag first sheet 56 Bag second sheet 60 Thermal insulation sheet 100 Heating element 201 Container first sheet 202 Container second sheet 203 Peripheral edge X Longitudinal direction Y Width direction

Claims (11)

a heat generating portion containing an oxidizable metal, a carbon component and water;
a container housing the heat generating part and having air permeability on at least one surface;
comprising a heating element comprising
The product of the air permeability (sec/100 mL) of the one surface of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.4× 10 ⁶ or more and 3.1. × 10 ⁶ or less,
A heating device that satisfies the following conditions and is used before going to bed.
Conditions: When the temperature was measured in an environment with room temperature of 20° C. and humidity of 50%, after the heating element started to generate heat, the heating device located on the other side of the container and facing the heat generation area. After the surface temperature (°C) reaches the maximum temperature, the average change rate of the surface temperature (°C) of the heating tool until the surface temperature (°C) reaches 45°C is -1.0°C/min or more, -0 .5°C/min or less. 2. The heating tool according to claim 1, wherein the maximum temperature is 60[deg.] C. or higher and 65[deg.] C. or lower under the conditions. 3. The heating tool according to claim 1, wherein under the conditions, the surface temperature of the heating tool reaches 45° C. from 35° C. in a period of 1.0 minute or longer and 1.5 minute or shorter. . The ratio of the basis weight (g/m ² ) of the content of the oxidizable metal to the air permeability (sec/100 mL) of the one surface of the container is 0.06 or more and 0.17 or less. The heating tool according to any one of claims 1 to 3 . 5. The heating tool according to any one of claims 1 to 4 , wherein said one surface of said container has an air permeability of 100 seconds/100 mL or more and 10,000 seconds/100 mL or less. The heating tool according to any one of claims 1 to 5 , wherein the content of the oxidizable metal is 250 g/m2 or ^more and 1200 g/ ^m2 or less per unit area of the heat generating portion in plan view. Claims 1 to 6 , wherein the total basis weight from the other surface of the container to the outermost layer of the heating tool on the side opposite to the heat generating part is 40 g/m2 ^or more and 300 g/ ^m2 or less. A heating device according to any one of the paragraphs. 8. The heating device according to any one of claims 1 to 7 , further comprising a heat insulating material covering said heating element on the other surface of said container. 9. The heating tool according to any one of claims 1 to 8 , wherein the air permeability of the other surface of said container is 10,000 sec/100 mL or more. a heat generating portion containing an oxidizable metal, a carbon component and water;
a container housing the heat generating part and having air permeability on at least one surface;
comprising a heating element comprising
The product of the air permeability (sec/100 mL) of the one surface of the container and the basis weight (g/m ² ) of the content of the oxidizable metal is 1.4×10 ⁶ or more and 3.1. × 10 ⁶ or less,
A ratio of the basis weight (g/m ² ) of the content of the oxidizable metal to the air permeability (sec/100 mL) of the one surface of the container is 0.06 or more and 0.17 or less,
A heating tool, wherein the one surface of the container has an air permeability of 100 seconds/100 mL or more and 10,000 seconds/100 mL or less, satisfies the following conditions, and is used before going to bed.
Conditions: When the temperature was measured in an environment with room temperature of 20° C. and humidity of 50%, after the heating element started to generate heat, the heating device located on the other side of the container and facing the heat generation area. After the surface temperature (°C) reaches the maximum temperature, the average change rate of the surface temperature (°C) of the heating tool until the surface temperature (°C) reaches 45°C is -1.0°C/min or more, -0 .5°C/min or less. 11. The heating tool according to any one of claims 1 to 10 , which is an eye mask type.

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