JP6783073B2 - A method for preventing a heating element for the human body and a heating composition solidified by the heat generation from giving a feeling of strangeness to the human body. - Google Patents

Description

The present invention relates to a heating element for the human body, and more particularly to a heating element for the human body which can alleviate the discomfort given to the human body by the heat-generating composition solidified by the heat generation.

Conventionally, a heating element using the heat of reaction obtained by reacting an exothermic composition containing a metal powder such as iron powder as a main component with oxygen in the air has been known, and the heating element is brought into contact with the human body. A method of supplying heat to the human body is used.

For example, a disposable body warmer for attaching to the instep is disclosed in Japanese Patent No. 4405437. This disposable body warmer is a breathable flat bag and generates heat containing an oxidizing metal such as iron as a main component. The composition is encapsulated, and the flat bag is a bag made of a breathable layer made of a breathable synthetic resin film and / or a non-woven fabric on one side and a synthetic resin laminated film on the other side.

Further, a foot thermal body having a pair of flat thermal agent accommodating portions arranged to face the instep side and the back side of the foot is disclosed in Japanese Patent No. 4628699, but iron powder is used as the thermal agent. A heat-generating agent that generates heat due to an oxidation reaction such as, etc. is used, and as an accommodating portion, one surface is a breathable sheet, the other surface uses nylon as the outermost layer, and a polyethylene film or the like is laminated on the inside thereof. A foot warmer in which a bag, which is a sheet, is used and an adhesive portion is provided on the outermost layer of the other surface is disclosed.

Japanese Patent No. 4405437 Japanese Patent No. 4628669

In a heating element utilizing such an oxidation reaction between metal powder and oxygen, the metal powder condenses and solidifies as the oxidation reaction progresses, and the flexibility is reduced. Therefore, a heating element that continues to supply heat for a long time after heat generation has a problem of giving a rugged feel to the surface of the human body in contact with the heating element, and the disposable body warmer and the heating element for feet have such a problem. It was a thing.

For example, when a heating element is used on the instep, the above problem is particularly remarkable. That is, since bones are exposed on the surface of the instep and complicated irregularities exist, when a heating element in which metal powder is condensed and solidified due to the progress of the oxidation reaction comes into contact with the heating element, it does not easily adapt to the irregularities on the body surface and follows. It becomes more difficult to do, and the feeling of stiffness becomes more sensitive, and it may even be painful.

The present invention has been made to solve the above problems, and the present invention is suitable for a method for alleviating the stiff feeling of an exothermic composition solidified by an exothermic reaction while supplying heat to the human body, and for this method. The purpose is to provide a heating element for the human body.

The heating element for the human body of the present invention is a heating element for supplying heat to the human body.
The heating element
A flat bag made of at least a part of a breathable laminate,
A heat-generating composition that generates heat due to the presence of air, which is enclosed inside the flat bag body,
It is composed of an adhesive layer laminated on at least a part of the outer surface of the flat bag body.
It is characterized by having an elastic layer between the surface to be applied to the human body and the heat generating composition.

The heating element for the human body of the present invention is a heating element for supplying heat to the human body.
The heating element is a flat bag body composed of a breathable laminated body and a non-breathable laminated body.
A heat-generating composition that generates heat due to the presence of air, which is enclosed inside the flat bag body,
It is composed of an adhesive layer laminated on at least a part of the outer surface of the flat bag body on the side of the breathable laminate.
It is preferable that the breathable laminate has a breathable portion and an elastic layer.

In the present invention, the elastic layer is preferably made of foamed polyurethane.

Further, the heating element for the human body of the present invention preferably further has a non-woven fabric, and is a breathable laminate having a breathable film, an elastic layer and a non-woven fabric in this order, or a breathable film, a non-woven fabric and an elastic layer in this order. It can be provided with a breathable laminate having.

Further, it is preferable that the elastic layer is one that alleviates the stiff feeling of the heat-generating composition that solidifies after heat generation and maintains the soft feeling.

Further, in the above heating element for human body, it is preferable that the adhesive layer is attached to the instep side of the foot.

Further, the heating element for a human body of the present invention preferably has an elastic layer capable of alleviating the influence of the temperature of the heating composition when the heating element for a human body is applied to the human body.

The method of the present invention generates heat for the human body, which comprises a flat bag body made of at least a part of a breathable laminated body and a heat generating composition which is enclosed inside the flat bag body and generates heat due to the presence of air. When applying the body to the human body
This is a method in which an elastic layer is provided between the surface to be exposed to the human body and the heat-generating composition to prevent the heat-generating composition solidified by heat generation from giving a sense of discomfort to the human body.

Further, the method of the present invention has a flat bag body composed of a breathable laminated body and a non-breathable laminated body, and a heat generating composition enclosed in the flat bag body and generating heat due to the presence of air. When applying a heating element for the human body consisting of objects to the human body
A breathable portion and an elastic layer are provided in the breathable laminate, and the breathable laminate side of the heat generating body for the human body is brought into direct or indirect contact with the surface of the human body to supply heat to the human body while generating heat. It is preferable that the method is a method for preventing the exothermic composition solidified by the above from giving a feeling of strangeness to the human body.

Here, the human body to which the above-mentioned heat generating body for the human body is applied is preferably the instep.

In the method of the present invention, it is preferable that the heating element for a human body has an adhesive layer on at least a part of the surface of the breathable laminate.

Further, the heating element for the human body of the present invention is a heating element for supplying heat to the human body, and the heating element is a flat bag body formed of at least a part of a breathable laminated body.
It is composed of a heat-generating composition that generates heat due to the presence of air, which is enclosed inside the flat bag body.
It is characterized by having an elastic layer between the surface to be exposed to the human body and the heat generating composition.

According to the present invention, it has been possible to realize a method of alleviating the stiff feeling of the exothermic composition solidified by the exothermic reaction while supplying heat to the human body. In addition, it was possible to realize a heating element for the human body that can alleviate the stiff feeling given to the human body by the heating element having the heat generating composition solidified by heat generation. In particular, according to the present invention, it was possible to realize a heating element for the human body suitable as a heating element for supplying heat to the instep. In other words, by using the heating element for the human body of the present invention, it was possible to continue to apply heat to the human body for a long time without giving a feeling of stiffness to the human body, particularly the instep.

It is a schematic diagram which shows the structure of one Embodiment of the heating element for a human body of this invention, (a) is a plan view, (b) is a sectional view. It is a schematic view which shows the structure of the conventional heating element, (a) is a plan view, and (b) is a sectional view.

Hereinafter, the present invention will be described in detail.
The present invention is a method for preventing a heat-generating composition solidified by heat generation from giving a sense of discomfort to the human body while supplying heat to the human body when the heating element is applied to the human body. The heat-generating body for the human body used in the present invention is composed of a flat bag body, a heat-generating composition sealed inside the flat bag body, and an adhesive layer, and the flat bag body is at least A part is composed of a breathable laminate (hereinafter, also referred to as a "breathable laminate"), and the breathable laminate is arranged on the human body side. In the present invention, the flat bag body is composed of a breathable laminate (human body side laminate) and a non-breathable laminate (hereinafter sometimes referred to as "non-breathable laminate"), and the adhesive layer is , It is preferable to be laminated on at least a part of the outer surface of the breathable laminate.

The breathable laminate of the flat bag body in the present invention is a laminate on the side that comes into contact (directly or indirectly) with the human body, and is composed of a breathable portion and an elastic layer. The breathable portion is composed of at least one or more breathable layers, and examples of the breathable layer include a breathable film and a laminated non-woven fabric, woven cloth, paper, etc. on the breathable film. However, it is not limited to these.

Breathable films preferably used in the present invention include non-woven fabrics, uniaxially or biaxially stretched porous films, non-porous films with through holes, and the like. The porous film preferably has through holes having an average pore diameter of 0.5 to 1000 μm.

As the porous film, those obtained by stretching the film uniaxially or biaxially are preferably used. As the material of the film, synthetic resin or the like is used, for example, polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene-vinyl acetate copolymer saponified product, ethylene-vinyl acetate. Examples thereof include a copolymer and polyethylene terephthalate, and one or a mixture of two or more of these may be used.

The method for forming the through hole is not particularly limited, but for example, the film may be formed by penetrating an ultrafine needle (including a hot needle), or a diamond (including an artificial one) or the like. Examples thereof include a drum having a metal powder and the like fixed pressed against a film to form a through hole, and a drum having a through hole formed by a laser.

The thickness of the porous film or the film provided with the through holes is not particularly limited, but is 10 to 500 μm from the viewpoint of strength, ease of forming through holes, handleability, economy, and the like. It is preferably, more preferably 15 to 200 μm.

As the elastic layer constituting the breathable laminate, polyurethane foam or the like is preferably used. The elastic layer may be a single layer or a plurality of layers.

The thickness of the elastic layer is not particularly limited, but is preferably 500 to 2000 μm from the viewpoint of alleviating the discomfort of the heat-generating composition solidified by heat generation. Further, if the elastic layer in such a thickness range is arranged on the side in contact with the human body, the heat generated by the heating element can be mildly transferred.

Other layers may be laminated on the elastic layer, for example, non-woven fabric, woven fabric (both non-woven fabric and woven fabric include mesh-like ones), polyethylene, polypropylene, ethylene vinyl acetate (EVA) and the like. A thermoplastic resin film or the like may be laminated. By laminating the non-woven fabric, the texture, texture and the like can be improved.

Examples of the non-woven fabric (or woven fabric) used in the present invention include those formed of natural fibers or artificial fibers.

The natural fiber is not particularly limited, and specific examples thereof include cotton, kapok, Manila hemp, sisal hemp, silk, wool, mohair, cashmere, camel, and alpaca.

In addition, examples of artificial fibers include regenerated fibers, semi-synthetic fibers, and synthetic fibers. Examples of the regenerated fiber include viscose rayon and copper ammonia rayon, examples of the semi-synthetic fiber include acetate and the like, and examples of the synthetic fiber include polyamide-based synthetic fiber, polyester-based synthetic fiber, and polyvinyl alcohol-based fiber. Examples thereof include synthetic fibers, polyvinyl chloride-based synthetic fibers, polyvinylidene chloride-based synthetic fibers, acrylic-based synthetic fibers, modacryl-based synthetic fibers, polyolefin-based synthetic fibers, fluorocarbon-based synthetic fibers, and polyurethane-based synthetic fibers.

Although the basis weight is not particularly limited nonwoven, for example, it is preferably from 20 to 70 g / ^{m 2,} and still more preferably from 20 to 50 g / ^{m 2.}

In the present invention, the breathable laminate preferably has a breathable film, an elastic layer and a non-woven fabric in this order, or has a breathable film, a non-woven fabric and an elastic layer in this order, from the side closest to the heat generating composition.

The non-breathable laminate constituting the other side of the flat bag body in the present invention is, for example, polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene-vinyl acetate copolymer saponified product. , Non-breathable films and sheets made of ethylene-vinyl acetate copolymer, polyethylene terephthalate and the like, and may be a single layer such as these films or a laminated body in which two or more are laminated. Further, the non-woven fabric may be laminated on the non-breathable laminate, and in this case, it is preferably laminated as the outermost layer.

Each layer constituting the breathable laminate and each layer of the non-breathable laminate may be laminated by a method such as an adhesive, or may be laminated by another method. Further, as a method of joining the ends of the breathable laminate and the non-breathable laminate to form a bag body, a method using heat fusion, an adhesive or the like, or a general method is used.

In the present invention, the heat generating composition is enclosed inside a flat bag body having no open portion. The exothermic composition used in the present invention is not particularly limited as long as it causes an exothermic reaction in the presence of air, but specifically, it is oxidized to a metal powder such as iron powder and this metal powder. Activated carbon that causes a reaction, adjusts the pH and acts as a catalyst, chloride that destroys the oxide film on the surface of the metal powder and facilitates the oxidation reaction of the metal powder, water, and stickiness due to the water. Those consisting of a water-retaining agent used to eliminate it are preferable.

As the heat-generating composition, iron powder is used as the metal powder from the viewpoints of safety, economy, long-term thermal effect, storage stability, etc., and the component ratio is iron 40 to 75% by weight, activated charcoal 1 to 10% by weight, It is preferably composed of 1 to 10% by weight of chloride, 10 to 40% by weight of water, and 1 to 40% by weight of a water retention agent.

Examples of the chloride include chlorides of alkali metals such as sodium chloride and potassium chloride, and metal chlorides such as chlorides of alkaline earth metals such as calcium chloride and magnesium chloride.

The water-retaining agent is not particularly limited as long as it has high water-retaining property and eliminates stickiness in the heat-generating composition, and examples thereof include vermulite, silica powder, wood powder, and water-absorbing polymer. Be done.

The heating element for human body of the present invention has an adhesive layer on a breathable laminated body of a flat bag body. The pressure-sensitive adhesive layer used for this pressure-sensitive adhesive layer is not particularly limited, and for example, vinyl acetate-based pressure-sensitive adhesive, polyvinyl acetal-based pressure-sensitive adhesive, vinyl chloride-based pressure-sensitive adhesive, acrylic-based pressure-sensitive adhesive, polyamide-based pressure-sensitive adhesive, and the like. Examples thereof include polyethylene-based adhesives, cellulose-based adhesives, chloroprene (neoprene) -based adhesives, nitrile rubber-based adhesives, butyl rubber-based adhesives, and silicone rubber-based adhesives.

In the present invention, if the breathable laminated body side constituting the flat bag body is arranged on the human body surface side for use, the adhesive layer may not be provided.

Since the heating element for the human body of the present invention has an elastic portion on the side in contact with the human body, even if the exothermic composition solidifies as the exothermic reaction progresses, the stiff feeling due to this can be alleviated and the exothermic reaction starts. The soft feeling of time can be maintained. Further, since the decrease in flexibility can be prevented, the heat generated by the heating element can be efficiently transferred to the human body. Furthermore, since it has an elastic part on the side that comes into contact with the human body, it is possible to alleviate the cold sensation that the heat generating body for the human body is affected by the cold air of the outside air and the hot sensation that is affected by the exothermic reaction of the exothermic composition. Because it can be made, it is a heating element that is gentle on the human skin and is comfortable to use. In particular, the heating element for the human body of the present invention can be preferably applied to the instep portion having complicated irregularities.

Hereinafter, the present invention will be described in detail with reference to an example used for the instep portion, which is one of the embodiments of the present invention, but the present invention is not limited thereto.

An embodiment of the structure of the heating element for the human body of the present invention will be described with reference to FIG. FIG. 1A is a schematic plan view thereof, and FIG. 1B is a schematic cross-sectional view thereof. In FIGS. 1A and 1B, 1 is a heating element for a human body of the present invention, and the heating element 1 for a human body is enclosed in a flat bag body 2 and the inside of the flat bag body 2. It is also composed of a heating composition 3 and an adhesive layer 4. Further, the flat bag body 2 is formed in a flat bag shape having no open portion, with one surface made of a non-breathable laminated body 5 and the other surface made of a breathable laminated body 6. The adhesive layer 4 is provided on the outer surface of the breathable laminate 6.

In the human body heating element 1 used in the examples, the non-breathable laminate 5 is a polyethylene film (manufactured by J-Film Co., Ltd., thickness 60 μm) as the non-breathable film 7 and polyethylene as the non-woven fabric 8 from the inside of the bag body. A terephthalate non-woven fabric (manufactured by Toyobo Co., Ltd., thickness about 0.2 mm) is laminated.

Further, in the heat generating body 1 for human body used in the examples, the breathable laminate 6 is a porous film (manufactured by Kojin Film & Chemicals Co., Ltd., thickness about 70 μm) and elastic as a breathable film 9 from the inside of the bag. The layer 10 is a foamed polyurethane (manufactured by Kurabou Co., Ltd., thickness 1.8 mm), and the non-woven fabric 11 is a polyethylene terephthalate non-woven fabric (manufactured by Toyo Spinning Co., Ltd., thickness about 0.15 mm). Has been hot melt sprayed.

Further, the heat generating composition uses iron powder as the metal powder, and the component ratio is iron 40 to 75% by weight, activated charcoal 1 to 10% by weight, chloride 1 to 10% by weight, water 10 to 40% by weight, water retention agent 1. In the human body heating element 1 used in the examples, the exothermic composition 3 has a component ratio of 60% by weight of iron, 3% by weight of activated charcoal, 3% by weight of sodium chloride, and the like. A material consisting of 31% by weight of water and 3% by weight of a water retention agent was used. Furthermore, the filling amount of the exothermic composition 3 was adjusted to the range of 500 to 7000 g / m ² .

In the flat bag body 2, the non-breathable laminated body 5 and the peripheral edge portion 12 of the breathable laminated body 6 are heat-sealed by heat sealing.

An adhesive layer 4 is provided on the outside of the breathable laminate 6. In the examples, an acrylic pressure-sensitive adhesive is used as the pressure-sensitive adhesive, a striped-shaped pressure-sensitive adhesive layer (thickness 19 μm) is formed, and on the outside of the pressure-sensitive adhesive layer 4, as a release paper 13, manufactured by Sun A. Kaken Co., Ltd. A thickness of about 40 to 50 μm) was laminated.

The obtained heating element 1 for a human body was housed in an outer bag coated with polyvinylidene chloride (PVDC) on an airtight biaxially stretched polypropylene (OPP) film.

Next, a foot heating element of a comparative example was prepared. The structure of the foot heating element 21 of the comparative example is shown in FIG. 2, where FIG. 2A is a schematic plan view and FIG. 2B is a schematic cross-sectional view. That is, the foot heating element 21 of the comparative example is composed of a flat bag body 22, a heat generating composition 23 sealed inside the flat bag body 22, and an adhesive layer 24. Further, the flat bag body 22 is formed of a non-breathable laminated body 25 on one surface and a breathable laminated body 26 on the other surface, and is formed in a flat shape without an open portion. The adhesive layer 24 is provided on the outer surface of the non-breathable laminate 25.

In the breathable laminate 26, a porous film (manufactured by Kohjin Film & Chemicals Co., Ltd., thickness of about 70 μm) and a non-woven fabric 28 were laminated as the breathable film 27. Further, as the non-breathable laminate 25, a polyethylene film (manufactured by J-Film Co., Ltd., thickness 60 μm) was used as the non-breathable film.

Further, as the heat-generating composition 23, the same heat-generating composition 3 used in the examples was used.

In the flat bag body 22, the peripheral portion 30 of the breathable laminated body 26 and the non-breathable laminated body 25 is heat-sealed by heat sealing.

The adhesive layer 24 is provided on the outside of the non-breathable laminate 25 in the same manner as in the examples, but the type and shape of the adhesive, the thickness of the adhesive layer, and the like are the same as in the examples. Further, on the outside of the adhesive layer 24, the same release paper 29 as in the examples was laminated.

The obtained heating element 21 for the human body of the comparative example was housed in an outer bag coated with polyvinylidene chloride (PVDC) on an airtight biaxially stretched polypropylene (OPP) film.

Next, a sensory test was performed as follows.
That is, the heating element 1 for the human body of the example and the heating element 21 for the human body of the comparative example stored in the outer bag were left for 2 hours in an environment of a temperature of 4 ° C. ± 2 ° C. Then, in an environment of a temperature of 20 ° C. ± 3 ° C., the heating element 1 for the human body was taken out from the outer bag, the release paper 13 was quickly peeled off, and the adhesive layer 4 was attached to the instep of the subject's left foot. The heating element 21 for the human body was taken out from the outer bag, the release paper 29 was peeled off, the adhesive layer 24 was attached to the instep of the right foot of the subject, and the shoes were immediately put on. A sensory evaluation was performed on the feeling of warmth and coldness from immediately after the attachment of the heating elements 1 and 21 for the human body to 1 minute.

The evaluation criteria for the sensory evaluation of the feeling of warmth and coldness are as follows. That is, when the heating element 1 of the example feels warmer than the heating element 21 of the comparative example, or the heating element 21 of the comparative example feels colder than the heating element 1 of the example, the symbol "A" is used. If neither the heating element 1 of the example nor the heating element 21 of the comparative example can be said to be warm or cold, the symbol "B" is used, and the heating element 21 of the comparative example feels warmer than the heating element 1 of the example. In this case, or when the heating element 1 of the example feels colder than the heating element 21 of the comparative example, it is indicated by the symbol “C”.

However, the subjects were 10 women, and each of them conducted a sensory test twice on each of the left instep and the right instep. The results are shown in Table 1.

In addition, the following sensory test was conducted for the soft feeling at the end of use. That is, after performing a sensory evaluation in the above-mentioned sensory test of the feeling of warmth and coldness, the heating element 1 of the example and the heating element 21 of the comparative example are set on the instep of the subject in an environment of a temperature of 15 ° C. ± 5 ° C. After 8 hours of use, a sensory evaluation was performed on the soft feeling felt on the instep. The results are also shown in Table 1.

The evaluation criteria for the sensory evaluation of softness are as follows. That is, when the heating element 1 of the example feels softer than the heating element 21 of the comparative example, the symbol "A" is used, and the heating element 1 of the example and the heating element 21 of the comparative example have a soft feeling. When no difference is observed, the symbol "B" is used, and when the heating element 21 of the comparative example is felt to be softer than the heating element 1 of the example, the symbol "C" is used.

As is clear from Table 1, in the heating / cooling sensation test at the time of application, 0 subjects answered that the heating element 21 of the comparative example felt warmer than the heating element 1 of the example. In addition, when the heating element 21 of the comparative example is attached to the instep, the subject feels considerably cold, but when the heating element 1 of the example is attached, some subjects do not feel the coldness but rather feel the warmth. Was done. This is because the heating element 1 of the embodiment has an elastic layer 10 interposed between the heating composition 3 and the instep portion, so that the heating composition 3 is cold because it is stored in a cold environment. Is difficult to convey, and it is thought that the heat insulating effect is exhibited. Therefore, even when the heating element is attached in winter (4 ° C ± 2 ° C), the feeling of coldness at the time of application can be suppressed, and immediately after application, heat generation is started without feeling too cold, and the heating element causes the heating element. The instep is warmed. That is, it was confirmed that the heating element for the human body of the present invention guarantees a feeling of warmth due to the heating element immediately after being applied to the human body without feeling too cold. Since the heating element of the present invention has an elastic layer interposed therebetween as described above, even if the heat generation of the heat generation composition progresses and the temperature rises considerably, the heat of the heat generation composition itself generated is directly applied to the instep. It is not transmitted and is expected to give a mild warmth.

Further, as is clear from the soft feeling test at the end of use in Table 1, 0 subjects answered that the heating element 21 of the comparative example felt softer than the heating element 1 of the example at the end of use. It was a person. The exothermic compositions 3 and 23 of Examples and Comparative Examples all showed a phenomenon of solidification after being used for 8 hours. However, in the heating element 1 of the example, since the elastic layer 10 is interposed between the solidified heat generating composition 3 and the instep portion, the feeling of solidification and hardening is not easily transmitted to the instep portion. The feeling of stiffness was alleviated, and the soft feeling at the start of use could be maintained. On the other hand, in the heating element 21 of the comparative example, since the elastic layer is not interposed between the heat generating composition 23 and the instep portion, the feel of the heat generating composition 23 solidified and hardened is directly applied to the instep portion. It was transmitted, and the rugged edge portion of the heating composition 23 hit the instep portion of the subject, causing a sense of discomfort. In the heating element 1 of the example, some subjects did not feel a sense of discomfort due to the solidified heating composition 3, but rather felt the soft feeling of the elastic layer 10 itself.

As is clear from the above results, according to the present invention, it has been possible to realize a method for alleviating the stiff feeling of the exothermic composition solidified by the exothermic reaction while supplying heat to the human body. In particular, even when applied to the instep where the bones are raised on the surface and have complicated irregularities, the human body could be warmed without feeling stiff. Further, by using the heating element for the human body of the present invention, it was possible to alleviate the discomfort given to the human body by the exothermic composition solidified by the exothermic reaction while supplying heat to the human body.

1 Heat-generating body for human body 2 Flat bag body 3 Heat-generating composition 4 Adhesive layer 5 Non-breathable laminate 6 Breathable laminate 7 Non-breathable film 8 Non-woven fabric 9 Breathable film 10 Elastic layer 11 Non-woven fabric 13 Release paper 12, 30 Peripheral part (heat seal)
21 Heating element for human body (heating element for feet) in Comparative Example
22 Flat bag 23 Heat-generating composition 24 Adhesive layer 25 Non-breathable laminate 26 Breathable laminate 27 Breathable film 28 Non-woven fabric 29 Release paper

Claims (3)

A heating element for supplying heat to the human body
The heating element
A flat bag composed of a breathable laminate and a non-breathable laminate,
A heat-generating composition that generates heat due to the presence of air, which is enclosed inside the flat bag body,
It is composed of an adhesive layer laminated on at least a part of the outer surface of the flat bag body on the side of the breathable laminate.
The breathable laminate has a breathable portion and an elastic layer, and has a breathable layer.
The thickness of the elastic layer is Ri 500~2,000μm der,
A heating element for the human body, characterized in that the heating element is for supplying heat to the instep . The heating element for a human body according to claim 1, wherein the elastic layer is made of foamed polyurethane. The first or second claim is characterized by comprising a breathable laminate having a breathable film, an elastic layer and a non-woven fabric in this order, or a breathable laminate having a breathable film, a non-woven fabric and an elastic layer in this order. The described heating element for the human body.

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