JP2020019571A - Kitchen paper roll product package - Google Patents

Abstract

To provide a kitchen paper roll product package storing one long kitchen paper roll of low exchange frequency in a packaging bag comprising a film, wherein a perforation line disposed on the packaging bag is easily opened and can prevent the perforation line from being unintentionally opened.SOLUTION: In a kitchen paper roll product package, a kitchen paper roll 1 is packaged in a packaging bag 2 so as to follow a surface shape of the kitchen paper roll 1, and a basic weight per 1 ply of the kitchen paper, a roll diameter, a winding length, a winding density, a roll mass and a roll density of the kitchen paper roll are adjusted respectively; further, a mode of a perforation line 21 disposed on the packaging bag 2 is adjusted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a kitchen paper roll product package in which one long kitchen paper roll with a low exchange frequency is stored in a packaging bag made of a film.

  A kitchen paper roll product package in which a kitchen paper roll is stored in a packaging bag made of a film is on the market. A packaging bag used for a kitchen paper roll product package is made of a film, and is generally formed with a perforation for opening the packaging bag, and the packaging bag with the perforation and the packaging bag are used. The kitchen paper roll product package that was used is being considered.

  For example, in Patent Literature 1, in a packaging bag for accommodating a plurality of kitchen paper rolls, an opening perforation is provided on an upper surface of the packaging bag, and the opening perforations are separated by a predetermined distance and are parallel to each other. A perforation is a set of two perforations formed as a set. One end of a band-shaped portion defined by the two perforations is a knob, and a set of perforations for opening is used. Disclosed are a kitchen paper roll packaging bag and a kitchen paper roll product package stored in the packaging bag, wherein the width is in the range of 3 to 20 mm.

JP 2005-153959 A

Here, as shown in FIG. 2, in the conventional kitchen paper roll product package 20, a plurality of rolls such as two or four rolls are often stored, and in this case, between the kitchen paper rolls. Since a gap is generated, the perforation can be easily opened by providing a perforation in the packaging bag film in a region having the gap.
On the other hand, in a kitchen paper roll product package in which one roll is stored in a packaging bag, from the viewpoint of space saving and cost, the kitchen paper roll as a content is packaged in the packaging bag so as to follow the surface shape of the roll. However, there is a problem that there is no gap between the packaging bag and the roll and it is difficult to open the package.
Further, in recent years, similar to the toilet roll, a kitchen paper roll product package containing a long kitchen paper roll has been put on the market from the viewpoint of reducing the frequency of replacement and ensuring space saving, For this purpose, it is necessary to harden the roll, and when doing so, the softness of the roll at the time of opening is reduced, so that there is a problem that the force is not easily transmitted to the film of the packaging bag and the film is not easily opened.
If the strength of the perforation is reduced to solve this difficulty in opening, the long kitchen paper roll is heavy, so it breaks from the perforation when the product is dropped and the film in the packaging bag during processing. In some cases, the perforation was opened unintentionally, such as when the piece was torn when tension was applied.
Therefore, the present invention is a kitchen paper roll product package in which one long kitchen paper roll with a low exchange frequency is stored in a packaging bag made of a film, wherein a perforation provided in the packaging bag is opened. An object of the present invention is to provide a kitchen paper roll product package that is easy to prevent unintended perforations from being opened.

  The inventors of the present invention have conducted intensive studies in order to solve the above problems. As a result, in a kitchen paper roll product package containing a single long kitchen paper roll with a low frequency of replacement, the basis weight per ply of kitchen paper, the winding diameter, the winding length, and the winding density of the kitchen paper roll. It has been found that the above problem can be solved by adjusting the roll mass, the roll density, and the form of perforations provided in the packaging bag, and completed the present invention. Specifically, the present invention provides the following.

(1) A first aspect of the present invention is a kitchen paper roll product package in which a kitchen paper roll in which a two-ply kitchen paper is wound into a roll is stored in a packaging bag made of a film, The kitchen paper roll is packaged by the packaging bag so as to follow the surface shape of the kitchen paper roll, and the kitchen paper has a basis weight per ply of 13 g / m ² or more and 30 g / m ² or less. The kitchen paper roll has a winding diameter of 80 mm or more and 150 mm or less, a winding length of 15 m or more and 70 m or less, a winding density of 0.3 m / cm ² or more and 1.4 m / cm ² or less, and a roll mass excluding the mass of the core. 130 g or more and 450 g or less, and the roll density is 0.07 g / cm ³ or more and 0.30 g / cm ³ , A perforation for opening the packaging bag is formed, and the perforation is configured by a cut portion and a non-cut portion being alternately continuous, and the length of each cut portion is reduced. A kitchen paper roll product package having a length of 0.1 mm or more and 5.0 mm or less, and a length of each of the non-cut portions is 0.1 mm or more and 5.0 mm or less.

  (2) A second aspect of the present invention is the kitchen paper roll product package according to (1), wherein a film constituting the packaging bag has a thickness of 20 μm or more and 55 μm or less. is there.

  (3) A third aspect of the present invention is the kitchen paper roll product package according to (1) or (2), wherein the strength of the perforation is 400 gf / 25 mm or more and 1800 gf / 25 mm or less. It is assumed that.

  (4) A fourth aspect of the present invention is the kitchen paper roll product package according to any one of (1) to (3), wherein a ratio of a total dimension of a non-cut portion to an entire length of the perforation. Is not less than 15% and not more than 95%.

(5) A fifth aspect of the present invention is the kitchen paper roll product package according to any one of (1) to (4), wherein the axial direction of the kitchen paper roll forms the packaging bag. The kitchen paper roll is stored in the packaging bag so as to be in the MD direction of
The perforation is formed so as to form an angle of ± 45 ° with respect to the MD direction of the film constituting the packaging bag.

  ADVANTAGE OF THE INVENTION According to this invention, in the kitchen paper roll product package which stores one long kitchen paper roll with a low exchange frequency in the packaging bag made of a film, it is easy to open the perforation provided in the packaging bag, Unintended opening of perforations can be prevented.

It is a perspective view showing appearance of a kitchen paper roll product package of the present invention. It is a perspective view showing the appearance of the conventional kitchen paper roll product package which stored a plurality of kitchen paper rolls. It is a perspective view showing appearance of a kitchen paper roll concerning the present invention. It is a figure which shows the process of an embossing process. It is a figure which shows the picked-up image of the defective article which the inner winding side of the roll protruded in the axial direction.

  Hereinafter, embodiments of the present invention will be described in detail. However, the following embodiments are presented for illustrative purposes, and the present invention is not limited to the embodiments described below.

<Kitchen paper roll product package>
FIG. 1 is a perspective view showing the appearance of a kitchen paper roll product package 10 of the present invention, and FIG. 2 is a perspective view showing the appearance of a conventional kitchen paper roll product package 20 containing a plurality of kitchen paper rolls. is there. The present invention relates to a kitchen paper roll product package 10 in which one kitchen paper roll 1 in which a two-ply kitchen paper 1x (see FIG. 3) is wound into a roll is stored in a packaging bag 2 made of a film.
As shown in FIG. 2, in the conventional kitchen paper roll product package 20, a plurality of kitchen paper rolls are often stored, and in this embodiment, a gap is formed between the kitchen paper rolls. By providing perforations in the packaging bag film in the above, the perforations can be easily opened.
On the other hand, in the kitchen paper roll product package 10 of the present invention in which one kitchen paper roll 1 is stored, the kitchen paper roll 1 is wrapped by the packaging bag 2 as shown in FIG. The packaging bag 2 is packaged so as to follow the shape, and a perforation 21 for opening the packaging bag 2 is formed in the packaging bag 2. As described above, the kitchen paper roll 1 is wrapped by the packaging bag 2 so as to follow the surface shape of the kitchen paper roll 1, so that the space saving required for a long roll product is satisfied. However, since there is no gap as in the conventional kitchen paper roll product package 20 storing a plurality of kitchen paper rolls, the perforation 21 tends to be difficult to open.
Therefore, in the present invention, by adjusting the requirements described later, the perforations 21 are easily opened, and unintended opening of the perforations 21 at the time of processing or dropping is prevented.

<Kitchen paper roll>
FIG. 3 is a perspective view showing the appearance of the kitchen paper roll 1 according to the present invention. The kitchen paper roll 1 of the present invention is obtained by winding a 2-ply kitchen paper 1x into a roll.

  Also, of the surfaces of the kitchen paper 1x, the surface directed to the outside of the roll is referred to as the roll surface 1a (or the surface 1a of the kitchen paper 1x), and the surface directed to the center of the roll is the roll back surface 1b (or the back surface of the kitchen paper 1x). 1b).

[Volume length]
The length of the kitchen paper roll 1 is 15 m or more and 70 m or less. If the length of the kitchen paper roll 1 is less than 15 m, the replacement frequency increases. If the length is more than 70 m, the winding diameter DR becomes large, making it difficult to hold in the hand and making it difficult to open the perforations 21.
In the present invention, by adjusting the winding length of the kitchen paper roll 1 to the above range, the replacement frequency of the kitchen paper roll 1 can be reduced, and the perforations 21 can be easily opened. The winding length is preferably 20 m or more and 50 m or less, and more preferably 30 m or more and 40 m or less.

[Winding diameter]
The winding diameter DR of the kitchen paper roll 1 is 80 mm or more and 150 mm or less. When the winding diameter DR of the kitchen paper roll 1 is less than 80 mm, the winding length is likely to be insufficient, and the frequency of replacement is high. In addition, if the winding length is to be a desired length, the basis weight must be reduced. In this case, more kitchen paper 1x must be consumed to absorb a predetermined amount of moisture, so that the frequency of replacement becomes higher. On the other hand, if it exceeds 150 mm, it is difficult to hold it with the hand and it is difficult to open the perforation 21.
By adjusting the winding diameter DR of the kitchen paper roll 1 to the above range, the replacement frequency of the kitchen paper roll 1 can be reduced, and the perforations 21 can be easily opened. The winding diameter DR is preferably 100 mm or more and 135 mm or less, and more preferably 110 mm or more and 130 mm or less.

[Winding density]
The winding density of the kitchen paper roll 1 is 0.3 m / cm ² or more and 1.4 m / cm ² or less.
Here, if the winding density is less than 0.3 m / cm ² , the winding length of the roll becomes shorter and the frequency of replacement becomes higher because the winding of the roll becomes weaker, or the winding diameter DR becomes larger and the perforation 21 becomes larger. It is difficult to open. In addition, the winding force of the inner winding becomes too weak, and as shown in the photograph of FIG. 6, the inner winding side of the roll may protrude in the axial direction to cause a defective product. On the other hand, when the winding density exceeds 1.4 m / cm ² , the kitchen paper roll 1 is hardly deformed, the force is not easily transmitted to the film of the packaging bag, and the perforations 21 are hardly opened.
In the present invention, by adjusting the winding density of the kitchen paper roll 1 within the above range, the replacement frequency can be reduced, the occurrence of defective products can be suppressed, and the perforations 21 can be easily opened.
For this reason, in this specification, the winding density is defined as a factor for expressing the winding strength of the roll.
The winding density of the kitchen paper roll 1 is preferably 0.4 m / cm ² or more and 1.1 m / cm ² or less, and more preferably 0.5 m / cm ² or more and 0.9 m / cm ² or less.

  The winding density is represented by (winding length × number of plies) ÷ (cross-sectional area of roll). The cross-sectional area of the roll is represented by {cross-sectional area of outer diameter (roll diameter DR) of the roll− (cross-sectional area of core outer diameter DI)}. The core (paper tube) outer diameter DI is the diameter of the center hole of the roll.

For example, in the case of a winding length of 33 m, two plies, a winding diameter of DR 118 mm, and an outer diameter of the core of 39 mm, the winding density = (33 m × 2) ÷ ｛3.14 × (118 mm ÷ 2 ÷ 10) ² −3.14 × (39 mm {2 ÷ 10) ² } = 0.68 m / cm ² . When the kitchen paper roll 1 has no core, the diameter of the center hole is defined as the core outer diameter DI.

[Basic weight]
The basis weight per ply of kitchen paper 1x is 13 g / m ² or more and 30 g / m ² or less. When the basis weight per ply of the kitchen paper 1x is less than 13 g / m ² , more kitchen paper 1x must be consumed to absorb a predetermined amount of water, and the replacement frequency is increased. On the other hand, if it exceeds 30 g / m ² , the roll mass becomes large and the load applied to the perforations 21 at the time of dropping or processing becomes large, so that unintended opening of the perforations 21 tends to occur. In the present invention, since the basis weight per ply of the kitchen paper 1x is adjusted within the above range, the frequency of replacing the kitchen paper roll 1 can be reduced, and unintended opening of the perforation 21 is prevented. can do. The basis weight per ply of paper towel 1x is preferably, more preferably 17 g / ^{m 2} or more 23 g / ^{m 2} or less is 15 g / ^{m 2} or more 26 g / ^{m 2} or less.
In addition, it is preferable that the paper thickness of the kitchen paper 1x is 0.8 mm / 10 ply or more and 3.2 mm / 10 ply or less.
As a method of adjusting the basis weight and the paper thickness per ply of the kitchen paper 1x to the above-mentioned ranges, the calender conditions of the base paper web (paper thickness and specific volume after calendering, paper thickness difference before and after calendering) and embossing conditions Can be mentioned.
It becomes.

[Roll mass]
The roll mass is the mass of the kitchen paper roll 1 per 206 mm of the roll width (roll width in the core direction) excluding the mass of the core (paper tube). The mass per roll of the kitchen paper roll 1 is 130 g or more and 450 g or less. When the roll mass is less than 130 g, the basis weight and the winding length are not properly maintained, and the frequency of replacement of the rolls increases. When the roll mass exceeds 450 g, the perforation 21 at the time of processing, dropping, etc. Since such a load increases, unintended opening of the perforation 21 is likely to occur.
In the present invention, by adjusting the roll mass to the above range, the basis weight and the winding length are appropriately maintained, the frequency of replacing the roll can be reduced, and unintended opening of the perforation 21 can be prevented. it can.
Further, the mass per roll excluding the mass of the core (paper tube) is preferably from 180 g to 410 g, more preferably from 210 g to 380 g. If the roll width is not 206 mm, the mass per roll is converted by proportional calculation.
In addition, the roll width of the kitchen paper roll 1 is preferably 150 mm or more and 300 mm or less, more preferably 160 mm or more and 260 mm or less, and even more preferably 170 mm or more and 220 mm or less.

[Core outer diameter]
The core outer diameter DI, which is the outer diameter of the core (paper tube) of the kitchen paper roll 1 of the present invention, is preferably 35 mm or more and 45 mm or less, more preferably 37 mm or more and 42 mm or less, and more preferably 38 mm or more. More preferably, it is 40 mm or less. When the core outer diameter DI is within the above range, the winding density of the kitchen paper roll 1 can be suitably maintained, and in addition, the handleability of the kitchen paper roll 1 during manufacturing is improved. The mass of the core of the kitchen paper roll 1 is preferably 5.4 g or more and 10.3 g or less, more preferably 6.6 g or more and 9.3 g or less, and 7.5 g or more and 8.7 g or less. Is more preferred. By setting the core mass within the above numerical range, good core strength and core cost suitable for a long kitchen paper 1x as in the present application can be realized. The mass of the core is a mass having a roll width of 206 mm, similarly to the roll mass.

[Roll density]
In the present invention, the roll density of the kitchen paper roll 1 is 0.07 g / cm ³ or more and 0.30 g / cm ³ or less.
When the roll density is less than 0.07 g / cm ³ , the winding diameter increases, and when the roll diameter is set to a desired value, a desired winding length cannot be obtained and the replacement frequency increases. On the other hand, if a desired winding length is to be obtained, the winding diameter becomes large and space saving cannot be realized. In addition, since the winding diameter is large, it is difficult to hold the perforation 21 and it is difficult to open the perforation 21. On the other hand, when it exceeds 0.30 g / cm ³ , the roll is hardened, so that the load on the perforations 21 at the time of processing or dropping is increased, and unintended perforations 21 are easily opened.
In the present invention, by adjusting the roll density of the kitchen paper roll 1 to the above range, the replacement frequency of the kitchen paper roll 1 can be reduced, the winding diameter DR is maintained in an appropriate range, and the perforation 21 is formed. It can be easily opened.
Preferably the roll density of the paper towel roll 1 is less than 0.10 g / cm ³ or more 0.25 g / cm ^3, more preferably at most 0.13 g / cm ³ or more 0.20 g / cm ^3.

The roll density of the kitchen paper roll 1 can be measured by the following method. First, the roll volume is represented by [{cross-sectional area of roll outer diameter (winding diameter DR) portion} − (cross-sectional area of core outer diameter DI portion)] × roll width (converted to around 206 mm). For example, when the roll mass per 206 mm of roll width is 327 g, the roll diameter DR is 122 mm, and the outer diameter of the core is 39 mm, the roll density is 327 g ÷ [｛3.14 × (122 mm ÷ 2 ÷ 10) ² −3.14 × ( 39 mm ÷ 2 ÷ 10) ² } × (206 mm ÷ 10)] = 0.15 g / cm ³ . When the kitchen paper roll 1 has no core, the diameter of the center hole is defined as the core outer diameter DI.

[Emboss pattern]
The kitchen paper roll 1 (kitchen paper 1x) of the present invention may or may not have an emboss pattern by being embossed. As the emboss pattern of the kitchen paper 1x of the present invention, a double emboss pattern is preferable. In double embossing, nested embossing is preferable. By the double embossing, an air layer is formed between the sheets, and the water absorption can be increased. When two-ply is laminated, a ply bond glue (glue) or a knurling (edge emboss) can be used, but it is preferable to use a ply bond glue from the viewpoint of difficulty in crushing the emboss.

The depth of the emboss pattern, the emboss area, and the area ratio of the emboss pattern are not particularly limited, but the depth of the emboss pattern is preferably 0.03 mm or more and 0.55 mm or less, and 0.10 mm to 0.45 mm. More preferably, it is more preferably from 0.15 mm to 0.38 mm. Preferably the embossed area is 0.2 mm ² or more 10.0 mm ² or less, more preferably from 1.0 mm ² is 7.0 mm ^2, and still more preferably from 2.0 mm ² is 5.0 mm ² . The area ratio of the emboss pattern is preferably 3% or more and 60% or less, more preferably 7% to 45%, even more preferably 10% to 30%. The depth of the emboss pattern, the emboss area, and the area ratio of the emboss pattern can be measured by the same method as described in JP-A-2017-131545.

  The depth of the emboss pattern can be controlled by appropriately adjusting the nip width of the rubber roll 4 (see FIG. 4) facing the emboss roll 3. The nip width varies depending on the characteristics of the roll, but is preferably from 20 mm to 50 mm, more preferably from 25 mm to 45 mm, and still more preferably from 30 mm to 40 mm. By setting the nip width within the above range, the paper thickness is appropriately maintained, the roll diameter DR is appropriate, the water absorption of the kitchen paper is suitable, and the replacement frequency is also suitable. The nip width can be measured using carbon paper. As a measuring method, first, the nip of the embossing roll 3 is released, and carbon paper and general copy paper are set one on top of the other. Next, a nip is applied to the embossing roll 3. After that, release the nip and remove the carbon paper and copy paper. Since the color of the carbon paper in the portion where the nip has been applied by the embossing roll 3 is transferred to the copy paper, the nip width can be measured. Note that the material of the embossing roll 3 is preferably a metal. The depth of the emboss pattern can be adjusted by making the nip width narrower if the embossing roll 3 is deeper, and widening the nip width if the embossing roll 3 is shallower.

<Kitchen paper>
Kitchen paper 1x may be composed of 100% by mass of wood pulp, and may include waste paper pulp, non-wood pulp, and deinked pulp. In order to obtain target quality, the content of NBKP (softwood bleached kraft pulp) is preferably 25% by mass or more and 70% by mass or less, more preferably 35% by mass or more and 60% by mass or less, More preferably, it is 40% by mass or more and 55% by mass or less. Further, the content of LBKP (hardwood bleached kraft pulp) is preferably 30% by mass or more and 75% by mass or less, more preferably 40% by mass or more and 65% by mass or less, and 45% by mass or more and 60% by mass or less. Is more preferable.

  Further, waste paper pulp derived from a carton for liquid beverages such as a milk carton may be contained, and its content is preferably 50 parts by mass or less based on 100 parts by mass of the pulp of NBKP and LBKP, and more preferably 30 parts by mass. Parts by weight or less, more preferably 10 parts by weight or less, and most preferably no waste paper pulp.

  Waste paper pulp derived from carton for liquid beverages such as milk carton is mainly made of softwood pulp, and has the advantage of easily improving the strength of kitchen paper 1x. However, if the dispersion is large in quality and the content ratio is too high, May affect product quality. By setting the content of wastepaper pulp derived from a carton for liquid beverages such as a milk carton within the above range, it is possible to effectively improve the strength of the kitchen paper 1x while suppressing variation in quality.

  In addition, as said LBKP, pulp formed from the species of Eucalyptus genus in the family Myrtaceae, represented by Eucalyptus grandis and Eucalyptus globulus, is preferable.

  In the present invention, the deinked pulp derived from newspaper or magazine waste paper can be blended in an amount of 25 parts by mass or less with respect to 100 parts by mass of the waste paper pulp derived from NBKP, LBKP and milk carton. When 25 parts by mass of the deinked pulp was blended, the content of the deinked pulp in the kitchen paper 1x (sheet) was 25 parts by mass / (100 parts by mass + 25 parts by mass) × 100 = 20% by mass. . The content of the deinked pulp is preferably from 0% by mass to 20% by mass, more preferably from 0% by mass to 10% by mass, even more preferably from 0% by mass to 5% by mass. And most preferably 0% by mass. Since the deinked pulp is also used paper, by mixing it with the pulp raw material, the variation in the quality of the kitchen paper 1x increases. Further, the deinked pulp usually contains a fluorescent dye, and if the content exceeds 20% by mass, the kitchen paper 1x may contain a large amount of the fluorescent dye. For this reason, the content of the deinked pulp is preferably 20% by mass or less.

  In addition, in order to secure the appropriate strength to the kitchen paper 1x, the strength can be adjusted by blending the raw materials by ordinary means and performing a beating treatment of the pulp fiber. As the beating to obtain the target quality, the difference in freeness before and after beating with a commercially available virgin pulp at the Canadian standard freeness measured by JIS P 8121 is preferably 20 ml or more and 350 ml or less, more preferably A beating treatment for reducing the volume to 50 ml or more and 300 ml or less, more preferably 100 ml or more and 250 ml or less can be given.

  When virgin raw materials are used for the stock, the kitchen paper 1x can be made by mixing a softwood kraft pulp and a hardwood kraft pulp having a certain range of fiber length and fiber roughness within a specific range. Depending on the required quality of the final product, softeners including debonder softeners, bulking agents, dyes, dispersants, dry paper strength agents, wet paper strength agents, drainage improvers, etc. A pitch control agent, an absorption enhancer and the like can be used. The same processing as in the case of the above-mentioned virgin system is performed also when the used paper material is used as the stock of the kitchen paper 1x.

<Packaging bag>
The kitchen paper roll 1 is packaged by a packaging bag 2 made of a film so as to follow the surface shape of the kitchen paper roll 1. In the kitchen paper roll product package 10 according to the long kitchen paper roll 1 having a low replacement frequency as in the present invention, space saving is required, and the kitchen paper roll 1 is made of kitchen paper by the packaging bag 2 made of a film. By packaging so as to follow the surface shape of the roll 1, space saving can be realized.
As such a packaging form, caramel packaging is preferable.
Caramel packaging is known, and a film extending along one direction of the kitchen paper roll 1 is wound around the kitchen paper roll 1 in a direction intersecting this direction, or from one end in the axial direction of a film formed in a cylindrical shape in advance. Insert kitchen paper roll 1. Then, of the film protruding from both ends of the kitchen paper roll 1, two opposing flap-shaped sides are folded on each other, and then another two opposing flap-shaped sides are similarly folded on each other. Seal by heat fusion or the like.

The film constituting the packaging bag 2 may be formed in a single layer or a plurality of layers.
The material of the film is preferably a thermoplastic resin (so-called plastic) suitable for recycling. Specific examples include conventionally known thermoplastic resins such as polyolefins (eg, polyethylene and polypropylene), polyesters (eg, PET), polyamides (eg, nylon), polycarbonate, polystyrene, polyvinyl chloride, and the like. is there.

The thickness of the film constituting the packaging bag 2 is preferably 20 μm or more and 55 μm or less. When the thickness of the film is less than 20 μm, holes are easily formed in the film at the time of heat fusion in the packaging process, and when the thickness exceeds 55 μm, it becomes difficult to open the perforations 21. In the present invention, by adjusting the thickness of the film constituting the packaging bag 2 to the above range, a hole is not formed in the film at the time of heat fusion in the packaging process, and the perforation 21 is easily opened. Can be.
The thickness of the film constituting the packaging bag 2 is more preferably 22 μm or more and 45 μm or less, and even more preferably 24 μm or more and 33 μm or less.

(Perforation)
As shown in FIG. 1, a perforation 21 for opening the packaging bag 2 is formed in the packaging bag 2. The perforation 21 is configured by the cut portions and the non-cut portions being alternately continuous, the length of each cut portion is 0.1 mm or more and 5.0 mm or less, and the length of each non-cut portion is The length is 0.1 mm or more and 5.0 mm or less. By adjusting the length of each cut portion and each non-cut portion in the perforation 21 to the above range, the perforation 21 can be easily opened, and unintended opening of the perforation 21 at the time of processing, dropping, or the like. Can be prevented. It is preferable that the length of each cut portion is 0.3 mm or more and 4.0 mm or less, and the length of each non-cut portion is 0.3 mm or more and 4.0 mm or less. More preferably, it is 0.5 mm or more and 3.0 mm or less, and the length of each non-cut portion is 0.5 mm or more and 3.0 mm or less. The lengths of the cut portions and the non-cut portions are weighted average values.

Further, in order to easily open the perforation 21 and prevent unintended opening of the perforation, the ratio of the total dimension of the non-cut portion to the entire length of the perforation 21 may be 15% or more and 95% or less. preferable. In addition, both ends of the perforation 21 are formed by cut portions. The ratio of the total size of the non-cut portions to the total length of the perforations is more preferably 25% or more and 85% or less, and still more preferably 40% or more and 70% or less.
The total length of the perforations 21 is preferably 5% or more and 100% or less, more preferably 50% or more and 100% or less, more preferably 75% or more and 100% or less with respect to the roll width. It is particularly preferably from 95% to 100%. As shown in FIG. 1, the perforations 21 are preferably provided linearly on the side surface of the packaging bag 2 of the cylindrical kitchen paper roll product package 10.

  The strength of the perforations 21 is preferably 400 gf / 25 mm or more and 1800 gf / 25 mm or less. By adjusting the strength of the perforation 21 within the above range, unintended opening of the perforation 21 is less likely to occur, and the perforation 21 can be reliably opened. The strength of the perforations 21 is more preferably 600 gf / 25 mm or more and 1600 gf / 25 mm, and the strength of the perforations 21 is more preferably 800 gf / 25 mm or more and 1400 gf / 25 mm.

  The strength of the perforations 21 can be measured using a Tensilon universal testing machine. First, the film sample is set on the Tensilon universal testing machine such that the perforations are orthogonal to the tensile direction of the Tensilon universal testing machine and the distance between the chucks is 100 mm. In addition, the dimension in the width direction of the film sample (the dimension in the direction perpendicular to the tensile direction of the Tensilon universal testing machine) was adjusted to 25 mm, and the perforation (25 mm) was set in the direction in the center between the chucks. . Thereafter, the film was pulled at a speed of 200 mm / min, and the tensile strength was measured until breaking from the perforations 21. The measurement was performed six times, and the average value was calculated.

  The kitchen paper roll 1 is stored in the packaging bag 2 so that the axial direction of the kitchen paper roll 1 is in the MD direction of the film constituting the packaging bag 2, and the perforations 21 are formed of the film constituting the packaging bag 2. It is preferably formed to form an angle of ± 45 ° with respect to the MD direction, more preferably formed to form an angle of ± 30 °, and formed to form an angle of ± 15 ° It is more preferable that the angle is ± 5 ° (substantially parallel to the axial direction of the kitchen paper roll 1 and the MD direction of the film constituting the packaging bag 2).

[Production method of kitchen paper]
The kitchen paper 1x can be manufactured, for example, in the following order: (1) paper making and creping; (2) embossing (see FIG. 4); and (3) lamination (see FIG. 4). At the time of lamination, each sheet on the front side and the back side of the kitchen paper 1x is embossed, and then laminated such that the convex surface of one sheet and the concave surface of the other sheet face each other to form two plies. When two-ply lamination is performed, ply bond glue (glue) or knurling (edge emboss) can be used. It is preferable to use a ply bond glue in order to maintain the shape of the emboss, make the water absorption suitable, and make the replacement frequency good.

  As described above, the present invention has been described using the embodiment. However, it is needless to say that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiment, and various changes or changes may be made to the above embodiment. It is clear to a person skilled in the art that improvements can be made. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

Hereinafter, Examples 1 to 21 and Comparative Examples 1 to 10 will be described.
The content (% by mass) of the pulp composition is such that NBKP 50%, LBKP 50%, waste paper pulp and deinked pulp derived from liquid beverage cartons such as milk cartons are not contained, and the above methods are used to obtain Table 1 to Table 3. The kitchen paper (2-ply, double embossed (nested embossed) pattern) and kitchen paper roll shown were produced. The emboss pattern was formed using the same apparatus, and the nip width of the rubber roll facing the emboss roll was unified to 32 mm.
Next, one kitchen paper roll is caramel-wrapped by the above-mentioned method so as to follow the surface shape of the kitchen paper roll by a package made of a film that has been perforated in advance, and the kitchen paper roll product package is formed. Obtained. The perforation is such that the kitchen paper roll is housed in the packaging bag such that the axial direction of the kitchen paper roll is in the MD direction of the film forming the packaging bag, and the perforation is formed of the film constituting the packaging bag. It was provided so as to form an angle of 0 ° with the MD direction, that is, parallel to the axial direction of the kitchen paper roll and the MD direction of the packaging bag. The total length of the perforations was the same as the length of the roll width (206 mm).

  The following measurements were made. In addition, each measurement was performed after maintaining the equilibrium state under the temperature and humidity conditions (23 ± 1 ° C., 50 ± 2% RH) specified in JIS P 8111.

  Basis weight: Measured based on JIS P8124 and converted per sheet.

  Winding length: The length of 10 sheets between the perforations of the kitchen paper roll was measured. Thereafter, the number of sheets of the roll was actually measured, and the winding length was obtained by proportional calculation from the length of 10 sheets and the number of sheets. For example, if the length of 10 sheets is 1.515 m and the number of sheets is 330, 1.515 m × (330/10) = 50 m. In addition, when there is no perforation, the winding length was obtained by actual measurement.

  Roll winding diameter DR, core outer diameter DI: Measured using a Diameter rule manufactured by Muratec KDS Co., Ltd. For the measurement, ten rolls were measured, and the measurement results were averaged.

  Roll mass: The roll mass was measured using an electronic balance. First, the mass of the roll including the core was measured, and then the mass of the core was measured. The mass of the core was subtracted from the mass of the roll including the core to obtain a roll mass. The roll mass measured 10 rolls, and averaged the measurement results. When the roll width was different from 206 mm, the roll width was converted to 206 mm to determine the roll mass. For example, when the roll width is 200 mm, the mass obtained by multiplying the roll mass by a coefficient (206/200) is defined as the roll mass per roll width of 206 mm.

  Regarding the winding density and the roll density, ten rolls were measured by the above method, and the measurement results were averaged. The perforation strength was measured for ten kitchen paper roll product packages by the above method, and the measurement results were averaged.

Twenty monitors performed a method of selecting “good” or “bad” for each evaluation item. The evaluation criteria are as follows. ◎, △, and Δ were accepted.
◎: When “good” is 18 or more and 20 or less ○: When “good” is 14 or more and 17 or less △: When “good” is 10 or more and 13 or less ×: “good” is 6 people XX: When there is no “good” or when 1 to 5

Each evaluation item will be described.
-Infrequently changing rolls For each kitchen paper roll, the period until one roll was used up was evaluated.
-Space saving The evaluation was made based on the winding diameter with respect to the winding length.
-Ease of opening perforations Each kitchen paper roll product package was held with both hands, and the thumb was opened right and left, and evaluated.
-Hardness of perforation during processing The hardness of perforation during the same film packaging process was evaluated.
-Difficulty of tearing perforation when dropped The difficulty of tearing perforation when each kitchen paper roll product package was dropped from a height of 100 cm was evaluated. Each kitchen paper roll was dropped from the bottom and from the side.

  Tables 1 to 3 show the obtained results.

  From the above results, according to the present invention, one long kitchen paper roll with a low exchange frequency is stored in a packaging bag made of a film, and the perforations provided in the packaging bag can be easily opened, A kitchen paper roll product package can be obtained, which can prevent unperforated opening.

DESCRIPTION OF SYMBOLS 1 Kitchen paper roll 1a Roll surface 1b Roll back surface 1x Kitchen paper 2 Packaging bag 21 Perforation roll 3 Emboss roll 4 Rubber roll 10 Kitchen paper roll product package 20 Conventional kitchen paper roll product package

Claims (5)

A kitchen paper roll product package including a kitchen paper roll in which a two-ply kitchen paper roll is wound into a roll in a packaging bag made of film,
The kitchen paper roll is packaged by the packaging bag so as to follow the surface shape of the kitchen paper roll,
The basis weight per ply of the kitchen paper is 13 g / m ² or more and 30 g / m ² or less;
The kitchen paper roll has a winding diameter of 80 mm or more and 150 mm or less, a winding length of 15 m or more and 70 m or less, a winding density of 0.3 m / cm ² or more and 1.4 m / cm ² or less, and a roll mass excluding the core mass of 130 g or more. 450 g or less, the roll density is 0.07 g / cm ³ or more and 0.30 g / cm ³ ,
A perforation is formed on the packaging bag to open the packaging bag,
The perforations are configured such that a cut portion and a non-cut portion are alternately continuous,
The length of each of the cut portions is 0.1 mm or more and 5.0 mm or less,
A kitchen paper roll product package, wherein the length of each of the non-cut portions is 0.1 mm or more and 5.0 mm or less.   The kitchen paper roll product package according to claim 1, wherein the thickness of the film constituting the packaging bag is 20 µm or more and 55 µm or less.   The kitchen paper roll product package according to claim 1 or 2, wherein the perforation strength is 400 gf / 25 mm or more and 1800 gf / 25 mm or less.   The kitchen paper roll product package according to any one of claims 1 to 3, wherein a ratio of a total dimension of the non-cut portions to the total length of the perforations is 15% or more and 95% or less. The kitchen paper roll is stored in the packaging bag such that the axial direction of the kitchen paper roll is the MD direction of the film forming the packaging bag,
5. The kitchen paper roll product package according to claim 1, wherein the perforations are formed at an angle of ± 45 ° with respect to the MD direction of the film forming the packaging bag.