WO2007080969A1

WO2007080969A1 - Heating element and packaged heating element

Info

Publication number: WO2007080969A1
Application number: PCT/JP2007/050326
Authority: WO
Inventors: Toshihiro Dodo
Original assignee: Mycoal Co., Ltd.
Priority date: 2006-01-13
Filing date: 2007-01-12
Publication date: 2007-07-19
Also published as: JP2009082156A

Abstract

A packaged heating element which has improved heating properties and eliminates a waste of resources to attain a reduction in cost. Also provided is a heating element (1) characterized by comprising two or more separated heating parts (3) formed by covering a heating composition (2) which generates heat upon contact with air with packaging materials (4 and 5) so that the separated heating parts (3) each protrudes on both of the front and back sides, the heating parts (3) being separated from each other by separating parts (12). It is further characterized by having a constitution in which at least part of each separated heating part (3) has air permeability and the heating element (1) can be folded at a given separating part (12), the width of the separating part (12) where folding is possible is larger than 0.5 times the sum of the thicknesses of the separated heating parts (3) located on both sides of the separating part (12).

Description

Specification

Heating element and heating element package

Technical field

[0001] The present invention relates to a heating element having a heat generating portion in which a plurality of section heat generating portions are provided at intervals by a section containing a heat generating composition that generates heat in the presence of air.

Background art

[0002] A heating element that contains a heat-generating composition that generates heat in the presence of air in a breathable bag can be removed from an air-tight (non-breathable) outer bag at the time of use without using fire. Heat can be obtained quickly, and it is convenient to carry and use easily. For this reason, it is widely used for use, throwing away warmers and medical warm compresses.

[0003] Such a heating element includes a means for preventing the heating element from moving in close contact with a desired part during use, and is widely used. For example, disposable warmers that do not have an adhesive layer, disposable warmers that have a sticky part on the outer surface of the inner bag, or plaster-type adhesive layers or gels that can be applied directly to the human body There is a heating element such as a hot compress with a compress layer. These heating elements are housed in an airtight outer bag in a state where the adhesive portion, the gel layer, and the compress layer are covered with a peelable member until use. Therefore, when using, the type of body warmer or hot compress that is used to cut out a part of the outer bag or to open the outer bag by opening the outer bag and take out the heating element, especially for pasting. Further, the peelable member is peeled off from the heating element and then applied to a desired site to start use.

In addition, there has been an increasing market demand for heating elements that are larger than the conventional slightly smaller ones. In addition, there is an increasing demand for a heating element having unprecedented flexibility.

[0004] However, as the heating element becomes larger, the outer bag also becomes larger, resulting in a decrease in heat generation duration, an increase in cost, and an increase in waste packaging due to an increase in the amount of scattered water. There is also a call for reducing waste.

Disclosure of the invention

Problems to be solved by the invention [0005] Accordingly, an object of the present invention is to provide a heating element package with improved heat generation characteristics, waste of resources, and cost reduction.

Means for solving the problem

[0006] The inventor has conducted extensive research and solved the above problems, thereby completing the present invention.

That is, the heating element of the present invention is formed by covering a heating composition that generates heat upon contact with air with a packaging material as described in claim 1, and bulges on both sides of the front and back sides. Two or more divided heat generating portions are provided via the divided portions, and at least a part of each divided heat generating portion has air permeability, and can be folded at a predetermined divided portion. The heat generating element is configured so that the width of the divided section is larger than 0.5 times the sum of the thicknesses of the divided heat generating sections on both sides.

Further, in the present invention described in claim 2, in the heating element according to claim 1, the predetermined section to be folded can be folded with a portion having air permeability inside. A heating element characterized by

The invention according to claim 3 is characterized in that in the heating element according to claim 1 or 2, the number of the divided heating parts is four or more.

Further, the present invention according to claim 4 is the heating element according to any one of claims 1 to 3, characterized in that the divided heat generating portions are provided in a stripe shape.

The invention according to claim 5 is the heating element according to any one of claims 1 to 4, characterized in that a fixing means is provided on at least a part of the exposed portion of the heating element. The invention according to claim 6 is the heating element according to any one of claims 1 to 5, wherein the fixing means is an adhesive layer, and a separator is provided thereon. Let's say.

Moreover, the heating element package of the present invention is an outer bag which is an airtight storage bag, as described in claim 7, wherein the heating element according to any one of claims 1 to 6 is folded at a predetermined section. It is characterized by being sealed in.

In addition, the heating element package of the present invention is an outer bag which is an airtight storage bag, as described in claim 8, wherein the heating element according to any one of claims 1 to 6 is folded at a predetermined section. And at least a part of the exposed part of the heating element is temporarily attached to at least a part of the outer bag. It is characterized by.

Further, the heating element package according to claim 9 is the heating element package according to claim 8, wherein the heating element has a 180 degree peel strength (JISZ-0237) force of 0.001 to 0.9 kg / It is characterized by being temporarily attached within a range of 25 mm.

The heating element package according to claim 10 is the heating element package according to any one of claims 7 to 9, wherein an opening notch is provided in a seal portion of the outer bag which is the airtight storage bag. It is characterized by that.

In addition, the heating element package according to claim 11 is the heating element package according to claim 10, wherein the notch does not contact at least the side of the outer bag which is an airtight storage bag, and the airtightness is reduced. It was provided in the seal part of the outer bag which is a bag delivery.

In addition, the heating element package of the present invention has two or more heating elements, each having a plurality of divided heating parts with the dividing part as an interval, and with the heating element force breathable part provided at an interval inside. A heating element package that is folded into a plurality of pieces and enclosed in a heat-sealed airtight outer bag, wherein each section heating section bulges on both sides with respect to the section section. Formed in a protruding shape, both sides of the heat generating part are uneven surfaces, and the heating element is not fixed to the airtight outer bag,

The heating element contains a heat generating composition that generates heat upon contact with air, and the partitioning part is a seal part that does not contain a heat generating composition, and is a classification part corresponding to a folding part that exists in the heating element. The width of the part is preferably larger than 0.5 times the sum of the thicknesses of the divided heat generating parts on both sides.

In the heating element package of the present invention, it is preferable that the number of the divided heat generating portions is four or more.

Moreover, it is preferable that the heating element package of this invention is that a division | segmentation heat_generation | fever part is striped. In addition, the heating element package of the present invention preferably has a fixing means in a part of the exposed portion of the heating element.

In the heating element package of the present invention, at least a part of the heating element is applied to at least a part of the inner surface of the airtight outer bag with a 180-degree pinole strength (JISZ-0237) force of 0.001 to 0.00. It is preferable to wear a 9Kg / 25mm temporary dress. [0007] Hereinafter, preferred embodiments of the present invention will be described.

The heating element package according to the present invention has two or more, preferably three or more, more preferably four or more heating elements provided with a plurality of divided heating parts spaced apart from each other. A heating element package enclosed in a heat-sealed airtight outer bag that is folded into two or more with the portion having the property inside, and each of the divided heat generating portions is divided into the divided portions. On the other hand, it is formed in a bulging shape on both sides that bulges on both sides, both surfaces of the heat generating part are uneven surfaces, the heat generating element is not fixed to the airtight outer bag, and the heat generating element is The section heat generating portion contains a heat generating composition that generates heat upon contact with air, the section is a seal portion that does not contain a heat generating composition, and the width of the section corresponding to the folded portion existing in the heat generating element is on both sides thereof. It is preferable that it is formed to be larger than 0.5 times the sum of the thicknesses of the segmental heating parts. Yes.

Further, in the heating element package, it is preferable that the divided heat generating portion is four or more divided heat generating portions.

Moreover, it is preferable that the said heating element package is that the said division | segmentation heat generating part is stripe shape. Further, the heating element package preferably has a fixing means in a part of the exposed portion of the heating element.

Moreover, it is preferable that the heating element package is temporarily attached to at least a part of an outer bag in which at least a part of the heating element is an airtight storage bag.

Further, the temporary heating of the heating element package is characterized in that it is temporary wearing in the range of 180 degree peel strength (JIS Z-0237) force 001-0.9 kg / 25 mm.

The invention's effect

[0008] According to the present invention, the heating element is folded into two or more with the air-permeable surface inside, and sealed in an air-tight outer bag, thereby saving the air-tight packaging material and reducing the heating element during storage. Prevents deterioration, can be stored stably for a long time, the large-sized heating element is compact, convenient to carry, stable storage in a stable airtight outer bag, easy to use, Manufacturing costs are reduced and transportation is advantageous.

Further, in the present invention, since the air-permeable surface is folded inward, the heating element can be prevented from being deteriorated during storage with a small amount of water evaporated in the heating composition. Also, by temporarily attaching at least a part of the exposed portion of the heating element to the outer bag packaging material, folding it, and sealing the peripheral portion of the outer bag packaging material excluding the area corresponding to the folded heating element Further, the heating element can be prevented from being displaced during folding, the folding speed can be increased, and the yield (yield) of the heating element package is greatly improved.

Brief Description of Drawings

FIG. 1 (a) is a plan view showing an example of a heating element of the present invention. (B) It is sectional drawing of ZZ.

FIG. 2 is an explanatory cross-sectional view for explaining the relationship between the width of the crease portion and the heat generating portion or the divided heat generating portion having the maximum thickness on each side across the crease.

FIG. 3 (a) is a plan view showing another example of the heating element folded in two enclosed in the outer bag of the present invention. (B) It is the sectional view of YY.

FIG. 4 is a plan view showing another example of the heating element of the present invention.

FIG. 5 is an explanatory view showing another example of the heating element of the present invention.

FIG. 6 is an explanatory view showing another example of the heating element of the present invention.

FIG. 7 is an explanatory view showing another example of the heating element of the present invention.

FIG. 8 is an explanatory view showing another example of the heating element of the present invention.

Explanation of symbols

[0010] 1 Heating element

2 Exothermic composition or exothermic composition molded body

3-segment heating section

4 Base material

5 Coating material

6 Ventilation regulator

7 Adhesive layer

8 Breathable adhesive layer

9 Senator

10 Breathable surface

11 Crease

12 Sealing part (partitioning part) 12 'center section

13 Heat seal part

15 Outer bag (non-breathable storage bag)

16 notches

21 Seal part

22 Outerwear

23 Outer temporary adhesive

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] The heating element of the present invention is provided with two or more divided heat generating parts via the dividing part, and at least a part of each divided heat generating part has air permeability and is folded at a predetermined dividing part. The heating element is configured so that the width of the bent section to be bent is greater than 0.5 times the sum of the thicknesses of the section heating sections on both sides. Contains a heat-generating composition that generates heat upon contact.

The heating element package of the present invention is a heating element package containing a folded heating element. The folded heating element of the present invention may be either on the inside or on the outside, but a heating element folded with the breathable surface of the heating element on the inside is preferable.

[0012] The preferred heating element of the present invention, for example,

1) A folded heating element that is folded at all sections,

2) A folded heating element in which at least one of the sections remains unfolded at the folding section.

Etc. are mentioned as an example. In particular, 2) and 3) are preferred.

[0013] The heating element package of the present invention is a heating element package in which a heating element is enclosed in a space of an outer bag formed by using a non-breathable packaging material and hermetically sealing a peripheral portion thereof. As a preferable example of the heating element package of the present invention,

1) A heating element package in which a folded heating element is enclosed in an outer bag which is an airtight storage bag.

2) A heating element package in which a folded heating element is enclosed in an outer bag, which is an airtight storage bag, and at least a part of an exposed portion of the heating element is temporarily attached to at least a part of the outer bag.

3) Enclose the folded heating element in an outer bag, which is an airtight storage bag. Heating element packaging in which at least a portion is temporarily attached to at least a portion of the outer bag, and the temporary attachment is temporary attachment in a range of 180 degree peel strength αι S Ζ— 0287) force 001 to 0.9 kg / 2 5 mm. object. Etc. are mentioned as an example.

[0014] Another example of the heating element package of the present invention is a heat generation in which an opening sealing means such as a notch is provided in a sealing portion at a peripheral edge of an outer bag that is a non-breathable storage bag corresponding to a storage space of the heating element. It is a body package.

[0015] As the packaging material used for the outer bag which is a non-breathable storage bag, a non-breathable packaging material described later can be used.

In the case where the heating element of the present invention is a heating element sealed in an outer bag which is an airtight storage bag, it is preferable that a notch for opening is provided in a seal portion of the outer bag which is an airtight storage bag.

Further, there is no limitation as long as the notch is provided at least in the seal portion of the outer bag which is an airtight storage bag and is not in contact with the inner side of the seal portion. An example is a notch that comes into contact with the outer side of the outer bag seal part, or a notch that is in the outer bag seal part and is not in contact with both the inner side that is the side of the stored heating element and the outer side that is the opposite side. As mentioned. The notches of the present invention are not limited, but I notches, V notches, U notches and the like are examples.

The seal part of the outer bag, which is a non-breathable storage bag, is formed near the outside of the peripheral edge of the heating element, so that the outer bag packaging material and the heating element are in close contact, and the heating element is folded. Combined with packaging in a state, the whole is extremely compact.

Even if the heating element is large, the number of members can be reduced compared to a conventional heating element that does not fold, and the cost can be reduced. In addition, there is an advantage that it can reduce dust generated during use and is friendly to the global environment.

The notches of the present invention are not limited, but I notches, V notches, U notches and the like are examples.

It is desirable that the notch allows the user to easily tear and open the outer bag.

Further, the notch forming means for forming the notch may be disposed on the downstream side of the sealing process by the sealing device, for example. [0016] The outer bag may have two or more storage spaces in a chain, and the storage space hermetically seals the middle part thereof to form a plurality of storage spaces partitioned from each other. May be. In that case, it is preferable to provide an opening means such as a notch in the peripheral sealing portion of the outer bag corresponding to the storage space of each heating element.

“Folding” in the present invention means that at least a part of the folded portion is in contact with the region of the non-folded portion.

The width of the section corresponding to the folded part of the heating element is formed to be larger than 0.5 times the sum of the thicknesses of the section heating sections on both sides. That is, if the width of the section to be folded is C, and the height of the section heating section on both sides is H and L, respectively, the ratio of C to (H + L), that is, the folding ratio C / ( H + L) is usually 0.5 or more, preferably 0.5 to 10, more preferably 0.55 to 10 and even more preferably 0.6 to 10, even more preferably. 0.7 to 10, more preferably 1.0 to 10, more preferably 1.2 to 10, more preferably 1.2 to 5, and still more preferably 1.2 to 3. is there.

The short length is C if the heating section of the heating element is different on one side and the other side. Since the heating element of the present invention is a double-sided uneven heating element in which the section is a recess (flat shape) and the section heating section is a projection, the folding ratio (C / (H + L)) is 0.5 or more It can be folded at the section that is less than 1.

Also, if the width of the section corresponding to the folded part of the heating element is different between the one side and the other side, the narrow and (short) width shall be the width C of the section.

In the present invention, more preferably, the heating element is configured such that the width of the bent section is greater than 0.5 times the sum of the maximum thicknesses of the section heating sections on both sides thereof. is there.

[0018] The exothermic composition used in the heating element of the present invention has moldability, the moisture in the exothermic composition does not function as an air blocking layer, and generates heat when in contact with air (oxygen). The composition is not limited, but contains iron powder, carbon component, reaction accelerator and water as essential components, and contains excess water with a mobile water value of 0.01 or more and less than 14 and is contained in the exothermic composition. Moisture does not function as an air barrier, and immediately after production, heat is generated in a moldable surplus water that generates heat with a temperature rise of 2 ° C within 5 minutes after being left in air at 20 ° C without wind Compositions are preferred. [0019] In addition to the above components, the exothermic composition containing moldable excess water contains a water retention agent, a water-absorbing polymer, a hydrogen generation inhibitor, a pH adjuster, an aggregate, a functional substance, a molding aid, a polyoxy Far-infrared radiation from nonionics such as ethylene alkyl ethers, zwitterions, anions, cationic surfactants, hydrophobic polymer compounds such as polyethylene and polypropylene, organic key compounds such as dimethyl silicone oil, pyroelectric materials, ceramics, etc. Substances, negative ion generators such as tourmaline, exothermic aids such as FeCl, metals other than iron such as silicon and aluminum

2

, Metal oxides other than iron oxide such as manganese dioxide, acid substances such as hydrochloric acid, maleic acid and acetic acid, fibrous materials such as pulp, fertilizer components such as urea, moisturizers such as glycerin and D-sorbitol, mold release You may contain at least 1 type chosen from the additional component which consists of an agent or these mixtures.

As the components of the exothermic composition of the present invention, any components of the exothermic compositions that have been disclosed in the past, are commercially available, or are used for known disposable warmers and heating elements can be appropriately selected and used. .

[0020] Although the mixing ratio of the exothermic composition is not particularly limited, the carbon component is 1.0 to 50 parts by weight with respect to 100 parts by weight of the iron powder, and the reaction accelerator is 1.0. It is a mixture containing ˜50 parts by weight and water 1.0 to 60 parts by weight as essential components.

Further, the following composition may be added to the exothermic composition at the following blending ratio. That is, with respect to 100 parts by weight of iron powder, water retention agent 0.01 to 10 parts by weight, water-absorbing polymer 0.01 to 20 parts by weight, pH adjuster 0.01 to 5 parts by weight, hydrogen generation inhibitor 0. 01 ~: 12 parts by weight, metals other than iron 1.0-50 parts by weight, metal oxides other than iron oxide 1.0-0-50 parts by weight, surfactant 0.01- 5 parts by weight, hydrophobic polymer Compounds, aggregates, fibrous materials, functional substances, organic silicon compounds, pyroelectric substances are each 0.01--10 parts by weight, moisturizers, fertilizer components, and fever aids are 0.01--10 parts each. Parts, molding aids, and mold release agents are 0.00:! To 5 parts by weight, and acidic substances are 0.01 to 1 parts by weight. It should be noted that the proportion of the magnetic material may be further blended if necessary.

This blending ratio can also be applied to a reaction mixture and an exothermic mixture. The mobile water value of the reaction mixture is usually less than 0.01.

In addition, the exothermic composition should be left in air in a 20 ° C-free environment immediately after production. It is preferable to generate fever, which has a temperature rise of more than 2 ° C within a minute.

The above-mentioned “heat generation with a temperature rise of 2 ° C or more within 5 minutes after standing in air at 20 ° C without wind immediately after production” means a aging period such as standing for 24 hours after production. When the exothermic composition is left on a non-water-absorbing material such as polyethylene film or polyester film sheet in air in a windless 20 ° C environment immediately after manufacturing, it must be within 5 minutes. The exothermic composition generates heat with a temperature rise of 2 ° C.

In the following exothermic composition temperature rise measurement method, the temperature rise within 5 minutes is preferably 2 ° C or higher, more preferably 5 ° C or higher, further preferably 10 ° C or higher, and more preferably 20 ° C. or higher, more preferably, the temperature increase within 3 minutes is 10 ° C. or higher. Here, the exothermic composition temperature rise measuring method is to use the exothermic composition immediately after production or the exothermic composition molded body. Use in a wind-free environment with an ambient temperature of 20 soil C. When the sample is measured, measure it in contact with air.

1. In case of exothermic composition

1) Install a magnet so as to cover the shape of the punched hole of the mold near the center of the back of the support plate made of vinyl chloride (thickness 5mm x length 600mm x width 600mm).

2) Place the temperature sensor on the center of the support plate.

3) Adhesive layer with a thickness of about 80 μm 25 μττη Length 250 mm X Width 200 mm Polyethylene film is attached to the support plate via the adhesive layer so that the center of the polyethylene film is at the sensor. wear.

4) Place a template of length 250mm x width 200mm with a hole of 80mm length x width 50mm x height 3mm on the center of the polyethylene film, place the sample near the hole, and push the plate Is moved along the template, and the sample is pushed into the punch hole, and the sample is rubbed while pushing the sample along the template surface (mold push molding), and the sample is filled into the mold. Next, temperature measurement is started except for the magnet under the support plate.

Use a data collector to measure the exothermic temperature, measure the temperature for 10 minutes at a measurement timing of 2 seconds, and determine the heat generation startability with the temperature after 3 minutes.

2. For exothermic composition molded bodies, 1) to 3) are the same as in the case of the exothermic composition.

4) Place the exothermic composition molded body on the center of the polyethylene film and start temperature measurement.

Use a data collector to measure the exothermic temperature, measure the temperature for 10 minutes at 2 seconds, and measure the temperature at 0 minutes, 1 minute, 3 minutes, 5 minutes, 6 minutes, and 7 minutes. Measure the exotherm at a temperature within 5 minutes.

[0022] The iron powder is preferably normal iron powder, iron alloy powder, or active iron powder made of iron powder or iron alloy powder having an oxygen-containing film on at least a part of the surface of the iron powder. The iron oxide film is a film made of iron containing oxygen, such as iron oxide, hydroxide, and oxyhydroxide. Active iron powder is an iron oxide film that is at least locally formed on the surface of the iron powder, and is formed by local batteries formed between the ground iron and the iron oxide film or by pits inside and outside the iron oxide film. The oxidation reaction promoting effect can be obtained.

Examples of the iron powder include, but are not limited to, pig iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. Furthermore, these iron powders may contain carbon or oxygen, or iron containing 50% or more of iron and other metals. There are no particular restrictions on the type of metal contained in the alloy, etc., as long as the iron component acts as a component of the exothermic composition. However, metals such as ano-reminimum, manganese, copper, nickel, silicon, cobalt, palladium and molybdenum An example is a semiconductor. The metal of the present invention includes a semiconductor. These metals and alloys may be present only on the surface or inside, or on both the surface and inside.

In the iron powder of the present invention, the content of the metal other than iron is usually 0.01 to 50% by weight, preferably 0.0 :! to 10% by weight, based on the whole iron powder.

[0023] The water may be from a suitable source. There are no restrictions on the purity and type. In the case of the exothermic composition, the content of water preferably contains:! To 70% by weight of the exothermic composition.

Further, in the case of the reaction mixture and the exothermic mixture before the contact treatment with the oxidizing gas, preferably 0.5 to 20% by weight of the reaction mixture or the exothermic mixture is contained.

[0024] The carbon component is not limited as long as it contains carbon as a component. In particular, adsorption protection Preferable activated charcoal,

[0025] The reaction accelerator is not limited as long as it can accelerate the reaction of the exothermic substance. Examples include metal halides, nitrates, acetates, carbonates, metal sulfates and the like. An example of the metal halide is sodium chloride.

[0026] The water retention agent is not limited as long as it can retain water. An example is wood flour.

The water-absorbing polymer is not particularly limited as long as it has a cross-linked structure and has a water absorption ratio of 3 times or more with respect to its own weight. It can also be a bridge between the surfaces. Conventionally known water-absorbing polymers and commercially available products can also be used. An example of the water-absorbing polymer is a crosslinked poly (meth) acrylic acid.

[0028] The pH adjusting agent is not limited as long as the pH can be adjusted. Alkali metal weak acid salts, hydroxides, etc. or alkaline earth metal weak acid salts, hydroxides, etc., Ca (OH) etc.

2 is an example.

[0029] The hydrogen generation inhibitor is not limited as long as it suppresses the generation of hydrogen.

An example is a compound comprising at least one or more selected from the group consisting of xio compounds, oxidants, alkaline substances, xio, antimony, selenium and tellurium. Examples of the iodo compounds include compounds with alkali metals and alkaline earth metals, metal sulfides such as sulfidizing power, metal sulfites such as sodium sulfite, and metal thiosulfates such as sodium thiosulfate. .

[0030] The aggregate is not particularly limited as long as it is useful as a filler and is useful for making Z or a porous heat-generating composition. Examples include fossil corals (coral fossils, weathered reef corals, etc.), bamboo charcoal, and bincho charcoal.

[0031] The molding aid is a moldability improving agent that improves the moldability of the excess water exothermic composition in combination with moisture.

[0032] The molding aid is not limited as long as it is water-soluble or hydrophilic and improves the moldability of the excess water heating composition, but glucose, fructose, sorbitol, maltose, lactose are not limited. , Sugars such as saccharose, trenorose, pectin, sugar alcohols such as mannitol, sonorebitol, maltitol, erythritol, xylitol, corn starch, wheat starch, rice starch, corn starch, potato starch, dextrin, Rufferized starch, partially alpha-monified starch, hydroxypropyl starch, carboxymethyl starch, dicyclodextrin, β-cyclodextrin, pullulan sugar starch, crystalline cellulose, carboxymethylcellulose, hydroxypropyl cellulose, low substituted hydroxy Celluloses such as propylcellulose, hydroxypropylmethylcellulose, methenoresenololose, canoleboxymethinoresenololose sodium, canolemellose, force nomeroscanum, canolemellose sodium, croscanolemellose sodium, ethinoreserolose acetate, hydroxymethylcellulose , Polypyrrole pyrrolidone, polyvinyl alcohol, stearate, sodium polyacrylate, agar, arabi Gum, sodium alginate, gelatin, corn syrup, mannitol syrup, carrageenan, gum tart, caraja gum, xanthan gum, julan gum, punoreran, guard run, gelatin, albumin, casein, soy protein, wheat protein, arapinogalactan, guagam , Low power Stobing gum, tamarind seed gum, tara gum, tragacanth gum, poly Ν vinylenorea cetamide, acrylic acid-starch copolymer, microcrystalline cellulose, ビニル vinylacetamide copolymer, bentonite, kaolin, sodium silicate, salt 匕 calcium, Examples include the use of montmorillonite, aluminum silicate or water-dispersed emulsion such as polyacetate bouillemarsion alone or in combination.

[0033] The release agent is not limited, but is a lubricating oil composed of mineral oil, synthetic oil, animal or vegetable oil, etc., high viscosity lubricating oil such as grease, natural wax, synthetic wax, silicone oil, Examples of such resins include fluorine resins, stearic acid, and stearates.

[0034] The functional substance is not limited as long as it has a certain function such as medicinal properties and aroma, but specific examples include acidic mucopolysaccharides, force mitsule, catechins, chitin and chitin. , Hamamelis extract, vitamin Ε, nicotinic acid derivative, algiroid, blood circulation promoters; citrus tincture, flavone derivative, naphthalene sulfonic acid derivative, anthocyanidin, vitamin Ρ, chickenpox, concolitic acid, silanol, terminaria, bisnaga, mayus Swelling agent such as aminophylline, tea extract, caffeine, xanthene derivative, inosit, dextran sulfate derivative, cypress, cincin, anthocyanidin, organic iodine compound, hardwood leather, shimoké leather, cedar, mannenrou, ginseng, Iyoukidzuta, Chiomukaze, slim agent such as hyaluronan © Russia Nida zero; Indometa Syn, dl-camphor, ketoprofen, shoga extract, capsicum extract, piroxicam, fuerbinac, methyl salicylate, glycol salicylate, etc .; lavender, oral mary, citron, di-nino, penomint, eucalyptus, benoregamot, iran Examples include fragrances such as Iran, rosewood and orange, and one or more fragrances can be used.

[0035] The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable. For example, skin stimulants, analgesic anti-inflammatory agents such as salicylic acid and indomethacin, and central nervous system agents. (Sleep sedatives, antiepileptics, neuropsychiatric agents), diuretics, antihypertensives, lotus vasodilators, antitussives, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, local anesthetics, etc. Is mentioned. These drugs are used alone or in combination of two or more as required.

[0036] The exothermic composition molded body of the present invention is usually similar to or similar to the sectioned exothermic part, and the exothermic composition part molded body of the present invention is composed of the exothermic composition part molded body and the compressed exothermic composition component. It means both exothermic composition compressed bodies that are shapes (hereinafter, exothermic composition compacts include exothermic composition compressed bodies).

[0037] The similar shape is a shape in which the shape of the divided heat generation and the shape of the exothermic composition molded body are placed in a planar shape or a three-dimensional shape, and the planar shape is similar. Alternatively, the planar shape and the three-dimensional shape are similar. However, the peripheral portion of the heat generating portion and the section heat generating portion is usually sealed and the peripheral portion is curved, while the exothermic composition molded body has a linear peripheral portion, Unless both are large and different in shape, such as a circle and a rectangle, the exothermic part and the segmental exothermic part and the exothermic composition molded body are regarded as similar shapes. The similar form is also included in the similar form

[0038] The mobile water value (0 to 100) of the moldable water-containing exothermic composition of the present invention is preferably 0.01 or more and less than 14 and more preferably 0.1 to 13.5. Yes, more preferably ί or 0.01-: 13, more preferably 0.01-12, still more preferably 0.01--11, still more preferably:!-11, Preferably 3 to: 11. If it exceeds 14, the exothermic properties deteriorate, and if it becomes larger, heat will not be generated unless excess water is removed from the exothermic molded product by water absorption or dehydration after molding.

[0039] Among the components constituting the exothermic composition of the present invention, a solid excluding a reaction accelerator, a water-soluble substance, and water The maximum particle size of the component is preferably 1 mm or less, more preferably 500 zm or less, more preferably 300 xm or less, still more preferably 250 zm or less, and even more preferably 200 μm or less. More preferably 100 μm or less.

In addition, among the components constituting the exothermic composition, the particle size of 80% or more of the water-insoluble solid component excluding the reaction accelerator, the water-soluble substance and water is preferably 300 zm or less, more preferably 25 O xm Or less, more preferably 200 zm or less, still more preferably 150 μm or less, and still more preferably 90. The particle size of ₀ or more is 150 zm or less, more preferably 90% or more of the particle size is 100 μm or less.

In addition, the moldability and shape retention of the exothermic composition are improved as the particle size of the water-insoluble solid component excluding the reaction accelerator, the water-soluble substance and water is smaller.

[0040] The heating element of the present invention is obtained by laminating a heating composition molded body obtained by molding a heating composition on a substrate, further covering with a coating material, and sealing the peripheral edge of the heating composition molded body. The heat generating part of the body is a divided heat generating part heating element composed of a heat generating part in which a plurality of divided heat generating parts are provided by a dividing part.

These heating elements may have fixing means in at least a part of the exposed portion.

[0041] The exothermic composition molded body is a molded body molded from the exothermic composition and having a certain shape, and it is sufficient that it can be laminated on at least the base material and the shape is maintained on the base material.

It is also preferable to leave it on non-water-absorbing films and sheets such as polyethylene, polypropylene, and polyester in an airless environment at 20 ° C and cause an exothermic reaction within 5 minutes.

[0042] The heat generating element according to the present invention includes a heat generating composition or a heat generating composition containing a heat generating composition and a heat generating composition or a heat generating composition formed body that does not contain a heat generating composition. As described above, a heating element having a heat generating portion in which a plurality of divided heat generating portions, preferably three or more, more preferably four or more, are provided with a space between the divided portions. At least a part of the heating element has air permeability.

The section heat generating portion is a heat generating body that houses the heat generating composition or the heat generating composition molded body, the section is a seal section, and the section heat generating section is provided at intervals with the section being an interval. . [0043] The exothermic composition molded body or the section heat generating portion may have any shape, but it may be a planar shape such as a circle, an ellipse, a football, a triangle, a square, a rectangle, a hexagon, a polygon, a star, a flower, A ring shape etc. are mentioned as an example. In three-dimensional shape, disk shape, pyramid shape, spherical shape, cubic shape, polygonal pyramid shape, cone shape, frustum shape, spherical shape, parallelepiped shape, cylindrical shape, rectangular parallelepiped shape, polyhedron shape, ellipsoid shape, Examples include a semi-cylindrical shape, a semi-elliptical cylinder shape, a mortar shape, a cylindrical shape, and an elliptic cylinder shape.

In addition, these shapes may be provided with rounded corners, the corners may be curved or curved, or the center may have a recess.

[0044] The shape of the heating element, the shape of the segment heating part, and the shape of the heating part do not have to be the same shape.

For example, a heating element having a segment heating part provided in a stripe shape (pleated heating element, pleated sheet, pleated heating element, pleated pack, pleated pad, pleated warmer, thermal pleat, hot pleat, hot pleat, hot cloth, In the case of hot cloth, thermal cloth, pleated cloth, etc., the shape of the segmented heat generating part is a parallelepiped shape that is a flat and elongated rectangle, and is arranged in stripes (stripes) at intervals. Examples include a heating element having a rectangular shape, a heating element having a bowl shape, and a heating element having a foot shape.

As another example, the shape of the divided heat generating portion is a planar shape and an oval shape, and they are arranged at intervals, and a heating element having a bowl shape or a rectangular heating element is one. Take as an example.

[0045] "Providing the heat generating portions of the present invention in stripes" means that a plurality of segmented heat generating portions are provided at intervals (parallel lines) in the form of stripes.

One streak is preferably composed of one section heat generating portion.

In addition, if the following conditions are satisfied, one streak is composed of two or more divided heat generating parts and one or more divided parts.

T is T≥2S, and preferably T≥2.5S.

Ρ is Ρ≤Τ, preferably Ρ≤0.5Τ. T: Length of one section heating part

S: Width of one section heating part

Ρ: Length of the section

As an example, it is possible to arrange stripes consisting of heat-generating sections in parallel stripes (vertical stripes, horizontal stripes, diagonal stripes, vertical wave stripes, horizontal wave stripes, diagonal wave stripes, etc.).

The size of the section heat generating portion or the exothermic composition molded body is not limited, but the preferred size is as follows.

1) In the case of circular shape, disc shape and disc-like shape

The diameter is preferably from about 1 mm to about 60 mm, more preferably from 2 mm to 50 mm, still more preferably from 10 mm to 40 mm, and even more preferably from 20 mm to 30 mm. The height is preferably from 0.1 mm to 20 mm, more preferably from 0.3 mm to 20 mm, still more preferably from 0.5 mm to 20 mm, still more preferably from 1 mm to 20 mm, more preferably 1. 5 mm to: 10 mm, more preferably 3 mm to 9 mm, further preferably 4 mm to 8 mm, and further preferably 5 mm to 7 mm.

The volume is preferably from about 0.0045 cm ³ to about 20 cm ³ , more preferably from about 0.2 cm ³ to about 11 cm ³ .

2) When the shape is other than 1) (rectangular, rectangular-like shape, etc.)

The width is preferably 0.5 mm to 60 mm, more preferably 0.5 mm to 50 mm, preferably 0.5 mm to 50 mm, more preferably lmm to 50 mm, and even more preferably 3 mm to 50 mm. More preferably, it is 3 mm to 30 mm, more preferably 5 mm to 20 mm, more preferably 5 mm to 15 mm, and still more preferably 5 mm to 10 mm.

The height is preferably 0.1 mm to 30 mm, more preferably 0.1 mm to 20 mm, still more preferably 0.1 mm to 10 mm, still more preferably 0.3 mm to 10 mm, More preferably, it is 0.5 mm to 10 mm, more preferably 1 mm to 10 mm, and further preferably 2 mm to 1 Omm.

The length is preferably 5 mm to 300 mm, more preferably 5 mm to 200 mm, more preferably 5 mm to 100 mm, and further preferably 20 mm to 150 mm. More preferably, it is 30 mm to 100 mm.

Further, the surface area is not limited as long as it has a function as a segmented heat generating portion, but is preferably about 50 cm ² or less, more preferably about 40 cm ² or less, still more preferably less than about 25 cm ² , preferably less than 20 cm ^2.

The volume of the segmented heat generating part or the volume of the exothermic composition molded body is preferably 0.015 cm ^{3 to} 500 cm ³ , preferably 0.04 cm ^{3 to} 500 cm ³ , and more preferably f 0.04 cm ³ to a 30 cm ^3, still more preferably 0. lcm ^³ ~30cm ^3, more preferably from lcm ^³ ~30c m ^3, still more preferably from 1 · 25cm ^³ ~20cm ^3, more preferably 1 · 25 cm ³ a to 10 cm ^3, more preferably 3 cm ³ ~: a 1 OCM ^3.

[0047] The exothermic composition molded body which is the exothermic composition molded body occupation area when the exothermic composition molded body is accommodated in the segmented exothermic part which is the exothermic composition part accommodating area. The volume ratio between the volumetric product and the volume of the exothermic composition storage area is usually 0.6 to 1, preferably 0.7 to:!, More preferably 0.8 to! And more preferably 0.9 to:!.

[0048] The segmented heat generating portion is formed in a unified structure having at least two facing surfaces, preferably the surface of the film layer substrate, and at least one surface is oxygen (air) permeable, and the heat generating composition When the molded object is stored,

The exothermic composition molded body volume, the space volume, and the section heating part volume have the following relationship. The exothermic composition molded body volume is the volume of the exothermic composition molded body itself, the space volume is the volume that is not occupied by the exothermic composition molded body, and the divided exothermic part volume is the divided exothermic part. Which is the sum of the space volume and the exothermic composition molded body volume.

[0049] The width of the section is not limited as long as the section heat generating section can be provided at intervals, but is usually 0.1 mm to 50 mm, preferably 0.3 mm to 50 mm. More preferably 0.3 mm to 50 mm, still more preferably 0.3 mm to 40 mm, still more preferably 0.5 mm to 30 mm, still more preferably lmm to 20 mm, still more preferably 3 mm to 10 mm. is there.

[0050] Here, the base material and the covering material in the present invention are not distinguished from each other by the material structure, and the material on which the exothermic composition molded body is laminated is defined as the base material. Covered The material to be applied is defined as a covering material.

The base material and the covering material are preferably made of a packaging material such as a heat-sealable thermoplastic resin film or sheet. Usually, the base material is non-breathable and the covering material is breathable. However, the base material may be breathable, and the covering material may be non-breathable or forceful, and both may be breathable.

[0051] Conventionally known packaging materials can be used as the packaging material that contains the exothermic composition and that constitutes the inner bag, which is a storage bag composed of a base material and a covering material. A conventionally known packaging material can also be used for the outer bag which is a non-breathable storage bag for enclosing and storing the heating element.

Examples of the packaging material include a breathable packaging material, a non-breathable packaging material, a stretchable packaging material, a non-stretchable packaging material, a water-absorbing packaging material, and a non-water-absorbing packaging material.

The packaging material used for the heating element of the present invention is appropriately selected from any packaging materials that have been disclosed in the past, are commercially available, or are used for known disposable warmers or heating elements. Can be used.

In this specification, the term “breathable inner bag” means that at least a part of the inner bag has a breathable portion.

As a breathable packaging material, a substrate or a covering material such as a porous film, a mechanically perforated non-breathable film, paper, a woven fabric, or a nonwoven fabric is generally used in a single layer or multiple layers. . Examples include film-like materials such as polyethylene, polypropylene, nylon, and rayon, and breathable sheets laminated with non-woven fabrics.

[0052] The air permeability of the packaging material of the inner bag is the moisture permeability according to the Rissi method (JIS K-7129A method), preferably 50 to 10, OOOgZm so 24hr, more preferably 100 to 5, OOOgZm SO 24hr, more preferably 100 to 600g / m ² / 24hr, more preferably 150 to 500g Zm ² / 24hr.

If the air permeability is low or the moisture permeability is lower than these ranges, the amount of heat generation tends to be insufficient.On the other hand, if the air permeability is high or the moisture permeability is high, the maximum temperature of the heating element becomes too high and the human body is burned. This is because there is a risk of incurring. Depending on the application, it can be used outside the above range.

[0053] The non-breathable packaging material is not particularly limited as long as it is non-breathable, but KOP (vinyl chloride). Metals with oxygen and nitrogen, such as K-coating (vinylidene chloride coating) film such as biliden coating (biaxially oriented polypropylene film), vapor deposition film (silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, and silicon oxynitride) Single-layer or laminated film (e.g., a film on which a compound or a metal such as aluminum is deposited), polyethylene, polypropylene, nylon, acrylic, polyester, polybutyl chloride, polyvinylidene chloride, polybutyl alcohol, polyurethane, polystyrene, Natural rubber, reclaimed rubber and synthetic rubber hatching styrene-acetic acid butyl copolymer, polymer film and sheet coatings such as ethylene monoacetic acid butyl polymer, and metals such as aluminum, silicon oxide and aluminum oxide, etc. Of metal compounds (metals include semiconductors) Wherein the metal foil Ya gold Shokuhaku of such laminated films and sheets and laminates thereof and aluminum sputtering such as a film or sheet obtained by sandwiching viewed laminated with or composite materials using them as an example.

[0054] As a material having stretchability, for example, styrene butadiene styrene block copolymer polymer (SBS), a synthetic rubber such as urethane, 0.88 to 0. Density force of 900 g / cm ³ even amorphous Orefuin system selected Examples include a film made of resin as a raw material, an apertured foam film, a net, a foamed foam sheet, and an extensible nonwoven fabric.

A non-extensible material may be used with imparting extensibility.

As another method for imparting extensibility, a method of cutting a cut line or a circle can be used.

[0055] As will be described below, a fixing means may be provided at least in part on the exposed surface of the inner bag. As the fixing means, a part having a thermal package for a joint peripheral part or a heating part is fixed to a required part. There is no limitation as long as it has a fixed capacity that can be determined. Removable fixing means are preferred.

Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners (magic tape (registered trademark)), magnets, bands, strings, etc., which are generally used as the fixing means, and combinations thereof Can be used arbitrarily.

In the case of a band, the adjustment fixing means may be further constituted by a combination of a hook-and-loop fastener and an adhesive layer. In addition, the separator can be overlapped with the fixing means as protection until it is used. The separator may be provided with a cut or the like such as a split so that the separation can be facilitated.

At least a part of the pressure-sensitive adhesive layer or the exposed portion of the heating element includes a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organic silicon compound, a hydrophobic polymer compound, a pyroelectric material, and an antioxidant. In addition, it may contain at least one selected from the group consisting of an aggregate, a fibrous material, a moisturizing agent, a functional substance or a mixture of these components.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not limited as long as it has an adhesive force necessary to adhere to the skin or clothes. Solvent type, aqueous type, emulsion type, hot melt type, reactivity, sensitivity Various forms such as a pressure system, a non-hydrophilic pressure-sensitive adhesive, a mixed pressure-sensitive adhesive, a hydrophilic pressure-sensitive adhesive (Giel etc.) are used. As the pressure-sensitive adhesive, known pressure-sensitive adhesives used for warmers and heating elements can be used.

Further, the pressure-sensitive adhesive layer may be air permeable or non-air permeable. What is necessary is just to select suitably according to a use. As for air permeability, it is only necessary to have air permeability as a whole. For example, a pressure-sensitive adhesive layer in which the pressure-sensitive adhesive is partially present and there is a portion in which the pressure-sensitive adhesive is not present partially and the entire region is breathable can be given as an example. When laminating the pressure-sensitive adhesive as it is on the air-permeable base material and / or coating material, as a method for maintaining the air-permeability, for example, the pressure-sensitive adhesive layer is partially printed by printing or transferring the pressure-sensitive adhesive. And the non-laminated part is used as a ventilation part, and the adhesive is moved in a two-dimensional direction, such as moving in one direction or moving in a zigzag while drawing a circle in a string, Examples of the adhesive that constitutes the adhesive layer include a method in which the gap between the thread-like adhesives has air permeability or moisture permeability, a method of foaming the adhesive, or a layer formed by a melt blow method. In addition, known ones conventionally used can be used.

Specifically, as an adhesive, a copolymer containing an aromatic butyl polymer such as styrene, and an alkyl or alkenyl (meth) acrylate, such as butyl (meth) acrylate, stearinole (meth) acrylate, and styrene. It is a mixture with styrene resin such as (meth) Styrenic pressure-sensitive adhesives, styrene-butadiene-styrene block copolymers (SBS), styrene-isoprene-styrene block copolymers (SIS), or their hydrogenated types (SEBS, SIPS) Examples thereof include hot melt adhesives and acrylic adhesives.

As the constituent component of the hydrophilic pressure-sensitive adhesive, known ones that have been conventionally used are used.

Specifically, polyacrylic acid such as polyacrylic acid, sodium polyacrylate, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, and other hydrophilic polymers such as polyacrylic acid, polyacrylate, and cellulose derivatives. An example is a hydrophilic pressure-sensitive adhesive composed mainly of a sticky agent.

The temporary sealing portion is formed through an adhesive layer, but the adhesive constituting the adhesive layer is a layer formed of a polymer composition having tack at normal temperature, and there is no limitation as long as it can be heat sealed after temporary attachment.

In addition, as the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer used for temporary attachment, the pressure-sensitive adhesive in the pressure-sensitive adhesive layer can be used.

Non-hydrophilic adhesive is preferred. The melting point of the base polymer of the pressure-sensitive adhesive having good compatibility with the heat sealing material constituting the heat seal layer is preferably equal to or lower than the melting point of the heat seal material. In particular, a hot melt adhesive is preferable for the hot melt adhesive. Further, when the heat seal material is an olefin-based material, an example of a preferable example of the pressure-sensitive adhesive is an olefin-based pressure-sensitive adhesive.

In addition, the method of providing the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer, and the adhesive layer may be provided on the entire surface, may be provided only in an area necessary for fixing, or may be provided partially or intermittently. . Various shapes such as a mesh shape, a stripe shape, a dot shape, a lattice shape, a stripe shape, and a belt shape can be given as examples. In particular, those provided in a net shape (spider web) by the melt blow method are useful.

If the pressure-sensitive adhesive layer is formed in stripes, dots, etc., the adhesive strength can be easily adjusted by changing the arrangement density. Air permeability can be secured between the tempered sheets.

When the pressure-sensitive adhesive layer is a hydrophilic pressure-sensitive adhesive layer, the hydrophilic pressure-sensitive adhesive layer and the exothermic composition If there is a difference in moisture retention between the molded body and the molded body, the moisture will move through the packaging material such as the base material between them, causing inconvenience for both. This happens especially during storage. In order to prevent this, it is preferable that the intervening packaging material has a water vapor transmission rate of ² gZm ² Zday or less, at least according to the Lissy method. By using this, when the heating element is stored and stored in an outer bag which is a non-breathable storage bag, moisture movement can be prevented.

When a hydrophilic pressure-sensitive adhesive layer is used for the pressure-sensitive adhesive layer, the moisture permeability of the moisture-proof packaging material provided between the exothermic composition molded body and the hydrophilic pressure-sensitive adhesive layer is within the range that does not affect the heat generation performance. There is no limit if the movement of minutes can be prevented, but the moisture permeability by the Lissy method (Lyssy method) is preferably ² g / m ² / day or less, more preferably 1.0 g / m ² / day or less. Yes, more preferably 0.5 g / m ² / day or less, and still more preferably 0.01 to 0.5 g / m ² / day. Here, the values are under the conditions of 40 ° C and 90% RH under atmospheric pressure. The moisture-proof packaging material can be used as a base material or a coating material, or can be laminated alone on a base material or a coating material.

[0057] The pressure-sensitive adhesive layer is covered with a peelable member until use so as not to directly contact the inner surface of the outer bag. The peelable member should be a thin material having an exfoliating property that enables at least one attachment / detachment to / from the adhesive layer. Usually, a substrate treated with a release agent is preferred.

[0058] As the base material of the separator, films, sheets, paper, non-woven fabrics, composite materials of these, etc., such as polypropylene, polyethylene, polybutyl alcohol, and PET are used.

[0059] As the release agent (release agent), silicone-based, fluorine-based, isocyanate-based and the like are preferable. These release agents (release agents) can be applied to a packaging material such as a base material by a known method.

[0060] Two or more, preferably three or more, more preferably four or more, multiple heating sections having a plurality of section heating sections according to the present invention are provided with cuts in at least a part of the region other than the section heating section. You can take it.

[0061] The incision in the present invention is a through notch constituted by a connecting portion and an incision that are intervals of the incision. The tip of the cut may not be in contact with the side of the heating element, or the tip of at least one cut of the cut may be in contact with at least one side of the heating element.

[0062] The installation location and number of cuts in the heating element of the present invention can be provided in any number other than the section heating section, but the section section is preferred as the installation area.

Further, the cut provided in the heating element having the separator may be a cut that penetrates the separator or a cut that does not penetrate the separator.

[0063] In the incision according to the present invention, the shape, type and size (length, width, etc.) of the incision, the shape, type, size (length, width, etc.) and notch of the joint, and notch (V notch, U notch, I notch, etc.) There are no restrictions, and any combination or repeated combination of them can be used.

Moreover, it is preferable that the connection part between cuts is shorter than a cut.

[0064] The at least one notch has at least one notch (V notch, U notch,

I notch etc.) and may or may not have contacts.

[0065] Examples of incisions include staggered incisions, perforations (such as perforated perforations), V-notched incisions, staggered incisions with V-notches, perforated with V-notches (can be hand-cut with V-notches) An example is a perforation).

[0066] When the staggered cuts are stretched, the staggered cuts can be extended or contracted by deforming the shapes of a plurality of cuts penetrating in the thickness direction. The staggered arrangement means that the incisions can be changed so that the incision can be deformed into a mesh shape so that it can be stretched (stretched) even with packaging materials such as non-stretchable materials and non-stretchable materials. In other words, it is a staggered arrangement that overlaps somewhere, and unlike a net that has been laced with a string, etc., the joint is integral, and the mesh is expanded while being spread by a certain notch length. Can be formed.

The staggered cuts are preferably provided in a direction substantially perpendicular to the direction in which expansion and contraction is desired. The number of cuts, the number of rows of cuts, and the like can be appropriately selected and used.

The length, the longest diameter, or the longest side of the notch is not limited.

There is no limit to the shape after stretching the staggered cuts. The size of the mesh shape after extending the cut is not limited.

[0067] The shape of the cut is not limited, but examples of the shape include a straight line, a rhombus, a hexagon, a shape of an ellipse, an ellipse, a circle, and an X shape in plan view.

[0068] Further, as an example of the heating element with a cut,

1) A heating element with notches in which staggered cuts are provided between at least one of the sectioned parts, and a heating element that enables expansion and contraction (extension) between the sectioned heating parts,

2) A heating element with a notch in which a perforated cut is provided between at least one of the sectioned parts.

Is mentioned.

[0069] The extensibility of the present invention means that, when an external force is applied, at least a part is longer than the length before the external force is applied in at least the direction in which the external force is applied. The length does not matter. Extensibility includes elasticity.

In the case of a heating element with extensibility, if extensibility is expressed in terms of elongation rate, the elongation rate is not limited as long as it exceeds 1, but the force depending on the application is preferably 1.005 to 10, More preferably ίMA 1. 01 to: 10, more preferably ί or 1. 01 to 5, more preferably ί or 1. 01 to 5, more preferably ί or 1. 01 to 3. More preferably, ί 1 · 01 to 2, more preferably ί or 1. 02 to 2, more preferably ί or 1. 03 to 2, more preferably ί or 1. 04 to 2, and further Preferably it is 1.05-2.

Here, the extension ratio means a quotient obtained by dividing the length after extension by the length before extension. That is, the elongation rate of the heating element = length after extension of the heating element / length before extension of the heating element. If it exceeds 10, the opening of the mesh becomes too large, and the tensile strength may decrease. The alternate cut usually has a function of imparting extensibility and stretchability.

[0070] The stretchability of the present invention means that when an external force is applied, it stretches, and when the external force is removed, it becomes shorter than the length when stretched.

The degree of shortening is not limited, but if the degree of shortening is displayed with a shortening rate, if the shortening rate exceeds 1, there is no limit, but the power depending on the application is preferably 1.005 to 10 More preferably, ί or 1.01 to: 10, more preferably ί or 1. 01 to 5, more preferably ί or 1. 01 to 5, more preferably ί or 1. 01 to 3. More preferred ίMA 1. 01 to 2, more preferred It is preferably ίMA 1.02-2, more preferably ίMA 1.03-2, more preferably ίMA 1.04-2, and more preferably 1.05-2.

Here, the shortening rate means a quotient obtained by dividing the length when extended by the length after removing the external force.

That is, the shortening rate of the heating element = the length when the heating element is extended / the length of the heating element after the external force is removed.

Further, there is no limitation on the tensile strength of the stretchable or stretchable heating element of the present invention, but a preferable example is 3N / 50 mm or more.

[0071] A heating element package in which two or more heating elements are folded and stored in the outer bag, which is the non-breathable storage bag of the present invention, is useful for storage and transportation. As long as the outer bag is non-breathable, it may be laminated without any other restrictions.

[0072] The packaging material of the airtight outer bag that accommodates the heating element should be substantially impermeable to air (oxygen). The non-breathable material or a conventionally known packaging material can be used.

The hermetic outer bag is formed by sealing around the wrapping material so as not to substantially transmit air (oxygen). Known sealing methods can be used. Usually, heat sealing is performed.

As an example, the manufactured heating element is interposed between two non-breathable films or sheets, and the two films or sheets are attached to the heating element at the same time as or after this intervention. An example is a heating element package in which the two films or sheets are sealed in a peripheral portion exceeding the size of the heating element at the same time after punching or after punching.

[0073] At least one part of the exposed portion of the heating element may be temporarily attached to the inner surface of the outer bag, which is a non-breathable storage bag (hereinafter referred to as outer temporary attachment).

Outer temporary attachment means that the heating element and the non-breathable storage bag are at least partially in contact with each other via the removable weak adhesive layer. Thereby, the movement of the outer bag of the heating element on the packaging material can be prevented at least until the heating element is folded. There are no restrictions on the number, area, etc.

. In the case of a heating element having a separator, the separator is also handled as a heating element.

[0074] A pressure-sensitive adhesive constituting a removable weak pressure-sensitive adhesive layer used for external temporary attachment (hereinafter, this pressure-sensitive adhesive is referred to as " There is no limitation as long as the heating element can be held in the packaging material until the folding operation with weak adhesive force is completed. An example of a removable adhesive that can be used is a weak adhesive.

Specifically, there are hot-melt adhesives, emulsion adhesives, solvent-based adhesives, etc. Especially, acrylics that have a high glass transition temperature are preferred, and the ratio of acrylic acid components is increased. In the case of rubbers, those containing a high melting point tack fire are preferred.

It is also possible to use the adhesive used for removable sticky notes sold as Post-it / POSITIT (trade name of 3EM).

Further, hot melt adhesives, particularly hot melt adhesives (polypropylene adhesives, polyethylene adhesives, ethylene propylene copolymer adhesives, etc.) are preferred.

[0075] As the hot-melt adhesive, an elastomer (thermoplastic elastomer, etc.), a thermoplastic resin, or the like is used as a base polymer. The base polymer may be used alone or in combination. Examples of the thermoplastic elastomer of the base polymer in the hot melt adhesive include styrene isoprene, styrene block copolymer (SIS), and styrene butadiene-styrene block copolymer. Polymer (SBS), Styrene / Ethylene / Butylene / Styrene Block Copolymer (SEBS), Styrene / Ethylene / Propylene / Styrene Block Copolymer (SEPS), Styrene / Ethylene / Propylene Block Copolymer (SEP), etc. Styrenic thermoplastic elastomers (styrenic block copolymers; eg, styrene-containing styrene block copolymers containing 5% by weight or more of styrene); polyurethane thermoplastic elastomers; polyester thermoplastic elastomers; polypropylene and EPT (ternary system) Ethylene-propylene rubber) Examples thereof include a blended thermoplastic elastomer such as a polymer blend.

[0076] In addition, examples of the thermoplastic resin of the base polymer in the hot-melt pressure-sensitive adhesive include polyolefin resins, vinyl acetate resins, polyester resins, styrene resins, acrylic resins, polyamide resins, and the like. It is done. In addition, as a polyolefin resin Is, for example, an ethylene-unsaturated copolymer such as an ethylene-vinyl acetate copolymer (EVA); an ethylene-acrylic acid copolymer (EAA), an ethylene-methacrylic acid copolymer (EMAA), etc. Carboxylic acid copolymers; ionomers; ethylene- (meth) acrylic acid ester copolymers such as ethylene-acrylic acid 2-ethyl hexyl copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer In addition to polymers (ethylene-butyl alcohol copolymers, etc.), polyethylene (low density polyethylene, linear low density polyethylene, meta-catalyzed polyethylene, medium density polyethylene, high density polyethylene, etc.), polypropylene, _α -olefin Copolymer (ethylene propylene copolymer, ethylene-butene monocopolymer, propylene-butene Polyolefins such as polypropylene copolymers; polypropylene modified resins and the like. Examples of the butyl acetate resin include poly (vinyl acetate), vinyl acetate- (meth) acrylic acid ester copolymer, vinyl acetate vinyl ester copolymer, vinyl acetate-maleic acid ester copolymer, and the like. It is done.

[0077] As the hot-melt pressure-sensitive adhesive, a hot-melt pressure-sensitive adhesive whose base polymer is a thermoplastic elastomer (particularly, a polyolefin-based thermoplastic elastomer or a styrene-based thermoplastic elastomer) is suitable.

[0078] The adhesives such as emulsion adhesives and solvent-based adhesives include acrylic adhesives, rubber adhesives, polyester adhesives, urethane adhesives, polyamide adhesives, and epoxy adhesives. In addition, adhesives such as bulle alkyl ether adhesives, silicone adhesives, fluorine adhesives, etc., and adhesives in their respective forms (eg, emulsion form, solution form, etc.).

[0079] In addition to the polymer component such as an adhesive component (base polymer), the adhesive may be a cross-linking agent (for example, a polyisocyanate-based cross-linking agent, an alkyl etherified melamine, depending on the type of the pressure-sensitive adhesive). Compound-based crosslinking agents, etc.), tackifiers (for example, rosin derivative resins, polyterpene resins, petroleum resins, phenol resins, etc.), plasticizers, fillers, anti-aging agents and the like may be added as appropriate.

[0080] The adhesive strength is not limited as long as the heating element and the packaging material can be adhered until the folding operation is completed, but preferably 180 degree peel strength JISZ-02 37) is from 0.001 to 0.9 kg / 25 mm, more preferably from 0.001 to 0.5 kg / 25 mm, and still more preferably from 0.001 to 0.1 kg / 25 mm, More preferably, it is 0.005 to 0. lkg / 25mm, more preferably 0.1 to 100gZ25mm, more preferably ί0.:! To 50g / 25mm, more preferably ί0. ! ~ 30g / 25mm, more preferably ί0.:! ~ 25gZ25mm.

[0081] In addition, the coating thickness is not particularly limited, but is preferably 3 mm or less, more preferably 0.1 x 3 to 3 mm, and still more preferably 0.1 x 2 to 2 mm. Is from 0.1 / im to: 1 mm, more preferably from 0.01 to 500 xm, more preferably from 0.1 to 100 μΐη, and even more preferably from 0.1 to 40/1. 111, preferably 0.1 to 40 xm, more preferably 0.:! To 30 / im, more preferably:! To 30 μm, more preferably 5 to 30 xm, more preferably 5 to 30 / im.

As the coating or forming method, a known forming method can be employed. Examples thereof include a hot melt coating method and a solution type coating method. Moreover, it can be in any form such as a whole surface, a partial shape, a solid shape, a net shape, a rod shape, a stripe shape, and a polka dot shape.

[0083] It should be noted that it is preferably provided near the opening of the bag, more preferably parallel to the opening, with no restriction on the external temporary attachment site (external temporary attachment position).

Further, when a separator is provided on the heating element, it is preferable to provide the separator so as not to separate from the heating element. When the heating element of the present invention is a heating element with a separator, the separator is included in the exposed portion of the heating element.

[0084] Since the heating element of the present invention can be obtained in various shapes, thicknesses, and temperature zones, it is not for normal body warming, for joints, for facial use, for eyes, for slimming, for drip solution heating / warming. , For thermal compresses, for medicine warmers, for neck, for waist, for masks, for gloves, for heels, or for alleviating symptoms such as shoulder pain, muscle pain, or physical pain, for cushions, during surgery It can be used for various purposes such as warming of the human body, warming sheet, transpiration, aroma, abdomen, transpiration insecticide, and medical treatment. In addition, machines can be used for warming pets and other purposes.

[0085] The easy water value is a value indicating the amount of excess water that can move out of the composition in the exothermic composition. This easy water value will be described. Place No. 2 JIS P3801 type 2) filter paper with 8 lines written at 45 degree intervals radially from the center point on a stainless steel plate. Place a template with a length of 150 mm x width of 100 mm with a hollow cylindrical hole with an inner diameter of 20 mm x height of 8 mm in the center of the paper, place a sample near the hollow cylindrical hole, and place the push-in plate on the template. The sample is pushed into the hollow cylindrical hole while pushing the sample, and the sample is worn along the template surface (indentation molding). Next, a non-water-absorbing 70 xm polyethylene film is placed so as to cover the hole, and a stainless steel flat plate with a thickness of 5 mm x length 150 mm x width 150 mm is placed thereon so that no exothermic reaction occurs. And hold for 5 minutes. After that, take out the paper and follow the bleed path of the water or aqueous solution along the radial line as the distance from the circumference that is the edge of the hole of the hollow cylinder to the tip of the bleed. Read with. Similarly, read the distance from each line and obtain a total of 8 values. Each of the 8 values (a, b, c, d, e, f, g, h) read is taken as the measured moisture value.

The arithmetic average of the eight measured moisture values is taken as the moisture straightness (mm) of the sample. In addition, the moisture content for measuring the true moisture straightness is the blended moisture content of the exothermic composition corresponding to the weight of the exothermic composition having an inner diameter of 20 mm and a height of 8 mm, and only water corresponding to the moisture content is used. Measure in the same way, and calculate the same value as the true water straightness (mm). The value obtained by dividing the moisture value by the true Minamata and multiplying it by 100 is the mobile water value.

That is,

Easy water value = [moisture value (mm) / true water value (mm)] X 100

Measure five points on the same sample, average the five commuting water values, and use the average value as the commuting water value of the sample.

In addition, when measuring the mobile water value of the exothermic composition in the heating element, the moisture content for measuring the true moisture value is calculated by calculating the moisture content of the exothermic composition from the moisture content measurement using an infrared moisture meter of the exothermic composition. Based on this, the amount of water necessary for the measurement is calculated, and the true water value is measured and calculated from the amount of water.

In addition, the exothermic composition having a mobile water value of less than 14 is placed with a non-water-absorbing 70 xm polyethylene film so as to cover the hole, and further, a thickness of 5 mm x length 150 mm x width 150 mm. If a windshield is put on instead of placing a stainless steel flat plate, the exothermic composition of the present invention undergoes an exothermic reaction during measurement, making measurement impossible.

In addition, when the moisture value is 0, the true moisture value is invalid regardless of the true moisture value. Even if it is bright, the exothermic water value of the exothermic composition is 0.

[0086] The exothermic composition part molded body of the present invention is molded by a mold-forming method such as a mold-through molding method containing a moldable water-containing exothermic composition, and a method for producing the exothermic composition molded body of the present invention is as follows. Examples of mold forming methods include mold-through molding methods such as mold forming methods. Mold-forming exothermic compositions formed from a moldable hydrous exothermic composition by a molding method using mold-through molding methods. A body or a plurality of exothermic composition molded bodies are laminated on a substrate at intervals.

Further, the heat generating part or the divided heat generating part is provided by covering with a covering material and sealing the peripheral part of the exothermic composition molded body. The peripheral edge of the heat generating part is sealed (crimp seal or thermo-compression seal or heat seal). The section heat generating section is composed of a plurality of parts, and each section heat generating section is separated by a section that is a heat seal section, forming a collective force heat generating section of the section heat generating section, and a peripheral portion of the section heat generating section. The periphery of the heating element is sealed (pressure seal, thermocompression seal, heat seal, etc.). Heat sealing is particularly preferable

Next, a heating element is manufactured through a cutting process or the like. The sealing step, the cutting step, etc. may be used by appropriately selecting from conventional methods and apparatuses.

[0087] The mold-through molding method is to produce a heat-generating composition molded body by using a punching die, molding a heat-generating composition, and laminating a punch-shaped heat-generating composition molded body on a substrate. It is a method to do.

The punching die is a die having a through hole having a desired shape and thickness.

A drum-shaped forming device in which the through-hole is provided on the rotating surface of a hollow drum-like rotating body, a strut-conveyor-like forming device using a strut-conveyor-like rotating body provided with a plurality of struts having the through-hole, etc. Is given as an example.

As a continuous manufacturing method, a rotary punching die is used, and a molding machine for laminating a die-shaped exothermic composition molded body on a long base material and covering it with a long covering material. Use a rotary sealer that can seal the surrounding part of the section and the base material and coating material (heat seal, pressure seal, heat seal, etc.), and the exothermic composition through the seal An example is a continuous forming method in which the necessary portions of the periphery and the section of the molded body are heat sealed and sealed.

[0088] The squeeze molding method is a method for producing a exothermic composition molded body by filling the exothermic composition into a squeeze mold having recesses and laminating the molded exothermic composition molded body on a substrate. It is. The punching die is a die having a recess having a desired shape and thickness.

An example is a heat generating composition molded body manufacturing apparatus in which a concave portion is provided on the outer surface of a drum-shaped rotating body or a hollow drum-shaped rotating body.

As a continuous manufacturing method, a molding machine for laminating a heat generating composition molded body on a long base material by covering the concave portion with a drum-shaped rotating body and transferring it to the base material, and covering it with a long covering material are used. Using a rotary sealer that can seal the target section and the periphery of the base material and coating material (heat seal, pressure seal, thermocompression seal, etc.), heat-generating composition molding through the seal An example is a continuous forming method in which the necessary parts of the twill part and the part of the body are heat sealed and encapsulated.

Hereinafter, the present invention will be described with reference to the drawings.

[0090] The heating element 1 shown in the plan view of Fig. 1 (a) and the cross-sectional view of Fig. 1 (b) uses a non-breathable base material 4 in which an adhesive layer 7 and a separator 9 are provided on a polyethylene film. On the polyethylene film side, a moldable surplus water exothermic composition with a mobile water value of 8 was prepared by mixing iron powder, activated carbon, wood powder, water-absorbing polymer, slaked lime, sodium sulfite and 11% saline. Using a punching die having a thickness of 2 mm, eight exothermic composition molded bodies 2 having a thickness of 2 mm, a length of 115 mm, and a width of 80 mm having a rectangular plane were formed and laminated on a substrate. Furthermore, a breathable wrapping material on which a nylon nonwoven fabric and a polyethylene porous film are laminated is applied to the covering material 5, and the polyethylene film surface and the porous film surface are overlapped with each other. Then, the peripheral part of the exothermic composition molded body 2 and the peripheral part of the heating element 1 were heat-sealed, and four pieces on each side of the central section were provided in a total of eight section heating sections 3 in a stripe shape. This is a rectangular concavo-convex heating element 1 having a thickness of 5 mm.

[0091] The section heat generating section 3 is configured such that at least a part thereof has air permeability so that oxygen can be supplied to the internal heat generating composition molded body 2.

Covering material 5 has air permeability, and a porous film is placed on the inner side of the nonwoven fabric sheet. A non-breathable base material made of a non-breathable synthetic resin film is used as the base material 4. As the breathable coating material, a non-woven sheet with a synthetic resin film laminated on a wrapping material can be used.

[0092] The heating element 1 of the present embodiment is formed in a substantially rectangular shape in a plan view, and in this rectangle, four divided heat generating portions each having a substantially rectangular shape in a plan view, on both sides of the central section 12 '. 3 are arranged symmetrically. Further, the corners of the heating element 1 are cut off in an R shape, and the corners of the section heating unit 3 are also formed in an R shape.

[0093] Each heating section 3 of the heating element 1 is formed in a bilaterally bulging shape that bulges toward the non-breathable base material 4 and the breathable coating material 5. That is, although there is a difference in bulging, as shown in the sectional view of FIG. 2, the divided heat generating section 3 includes a plurality of, for example, four, substantially surrounding upper and lower surfaces facing each other and surrounding them. A flat polyhedron, for example, a heat-generating composition molded body 2 formed in a substantially hexahedron shape, is covered with the side surface.

In addition, the side surface made of the breathable coating material 5 and the side surface made of the non-breathable base material 4 constitute the side surface of the divided heat generating portion 3.

The side surface made of the breathable covering material 5 is vertical or rises at an angle from the upper surface side made of the section 12, and the side surface made of the non-breathable base material 4 is vertical from the lower surface side made of the section 12, Alternatively, each section heat-generating part 3 and each heat-generating composition molded body 2 inside thereof have substantially the same thickness over substantially the entire flat direction. Also, the rising force from the upper surface side of the side surface made of the breathable coating material 5 and the rising degree from the lower surface side of the side surface made of the non-breathable base material 4 are not necessarily the same.

From the above, in the heating element 1 of the present embodiment, the thickness of the segment heating part 3, that is, the thickness of the heating composition molded body 2 is substantially constant in the flat direction from the central part to the peripheral part. In addition, there is an advantage that temperature unevenness hardly occurs between the divided heat generating portions 3 in the square direction. Further, for example, even if a force that pushes the exothermic composition molded body 2 in the flat direction is applied to the divided heat generating portion 3, the peripheral portion does not become a wedge shape and is substantially constant in the flat direction. Since the thickness is maintained, the heat generation failure due to the lack of the exothermic composition molded body 2 at the peripheral portion does not occur. On the contrary, the exothermic composition molded body 2 inside the section heating section 3 is pushed and widened in the flat direction. The greater the acting force, the more uniform the thickness of the segmented heat generating part 3 in the flat direction.

[0095] An adhesive layer 7 made of an acrylic adhesive is provided on the outer surface side of the non-breathable substrate 4 of the heating element 1.

In the present invention, the heating element 1 is formed such that the width of the central section 12 ′ is greater than 0.5 times the sum of the thicknesses of the section heating sections Al and B 1 on both sides.

Fig. 2 is an enlarged view of the folded part. In this example, the folded portion is in the center, and the width (C) of the folding portion 12 'is 12mm. As described above, the thickness of the divided heating portions Al and B1 on both sides of the dividing portion 12' is as described above. The sum (H + L) of each is 5mm, which is larger than 0.5 times the sum of 10mm.

That is, C = 12, 0.5 X (H + L) = 0.5 X (5 + 5) = 5, and 12> 5 (C> 0.5 X (H + L)) .

The heating element 1 folded along the central section 20 is not crushed when the segment heating sections Al and B1 are pulled toward the center.

As a result, even when the heating element 1 is opened during use, the thickness of the segment heat generating part 3 is kept substantially constant from the central part to the peripheral part. There will be no heat generation failure due to 2A shortage.

FIG. 3 (a) is a plan view of the heating element package of the present invention, and FIG. 3 (b) is a cross-sectional view thereof. It is formed by enclosing the heating element 1 in an outer bag 15 which is a non-breathable storage bag and storing it in the space of the outer bag 15 in a folded state. A notch 16 serving as an opening means is provided at the end of the seal portion 21 of the outer bag, which is a non-breathable storage bag, corresponding to the storage space for the heating element. The notch 16 is not in contact with the outer side of the outer bag 15 and is provided in the seal portion of the outer bag 15. It should be provided in contact with the outer side of the outer bag 15 in the inner area of the seal part of the outer bag 15.

That is, the heating element 1 generates heat so that the breathable coating 5 is on the inside and the non-breathable substrate 4 is on the outside, and the separator 9 is on the outside so that the outside of the adhesive layer 7 is covered tightly. Folded in half along the section 12 'at the center of body 1. Further, the heating element 1 and the outer bag 15 are partly attached to each other and are temporarily attached 22 by an external temporary attachment type adhesive 23.

Further, the outer bag 15 has a predetermined width between adjacent edges of the peripheral portion excluding the heating element 1. By sealing in an airtight manner, it is sealed in a bag shape.

[0098] Further, since the heating element 1 is enclosed in a folded state, even if the heating element 1 is large, the heating element 1 is very compact in a packaged state, and has an advantage of excellent portability.

[0099] As described above, since the surface area of the heating element 1 is almost halved, the number of members can be reduced and the cost can be reduced as compared with a conventional disposable body warmer with little change in heat generation characteristics over time. There is also an advantage that it can be reduced and it is friendly to the global environment.

[0100] The packaging material used for the outer bag, which is a non-breathable storage bag, can use the non-breathable packaging material and the like. It is desirable to form the above notches (I-notch, U-notch, V-notch, etc.) so that the user can easily tear and open the outer bag. Moreover, what is necessary is just to arrange | position the notch formation means which forms a notch, for example in the downstream of the sealing process by a sealing device.

[0101] The outer bag 15, which is a non-breathable storage bag, is formed of a non-breathable sheet and covers the periphery of the heating element 1 with a heat seal or the like in an airtight manner until the heating element 1 is used. Exothermic The supply of oxygen to the molded product is cut off.

The outer bag 15 may be a so-called easy peel film that, when sealed, becomes a soft-adhesive state that can be easily peeled off. As the packaging sheet made of this easy peel film, a known material such as a non-breathable synthetic resin film coated with an easy peel styrene resin or the like can be appropriately used.

[0102] The outer bag 15 is formed in a shape that is slightly larger than that of the heating element 1 according to the folded shape of the heating element 1 (here, substantially rectangular).

FIG. 4 is a plan view of a heating element according to another example of the present invention.

The section heating section 3 is circular and can be folded at the center.

[0104] Fig. 5 (a) shows that a striped adhesive layer 7 is provided on the ventilation surface of the heating element 1 having two divided heating parts 3 across the dividing part 12 'which is a seal part at the center. FIG. 2 is a plan view of a heating element 1 obtained. At the end of the seal portion 21 of the outer bag 15, a notch 16 that is an opening means is provided corresponding to the storage space for the heating element.

The notch 16 is an inner region of the seal portion of the outer bag 15 and is provided in contact with the outer side of the outer bag 15. It is. The outer bag 15 may be provided in the seal portion of the outer bag 15 without contacting the outer side of the outer bag 15. This is a type of heating element 1 that is used with the adhesive layer side in contact with clothes and the surface on which the adhesive layer 7 is not provided in contact with the body.

FIG. 5B shows a cross-sectional view of the pressure-sensitive adhesive layer 7 provided with a separator 9. FIG. 5 (c) is a plan view of the heating element package 19 which is folded into two at the center with the air-permeable surface inside and sealed in the outer bag 15 which is a non-air-permeable storage bag. Figure 5 (d) is a cross-sectional view of W_W.

[0105] The heating element 1 in Fig. 6 (a) is an example of the heating element 1 formed by enclosing the heating element 1 in an outer bag 15 in a folded state. A notch 16 is provided in the seal portion 21 of the outer bag 15 which is a non-breathable storage bag.

The air-permeable pressure-sensitive adhesive layer 8 on the ventilation surface is provided with a separator 9, and a flat shape in which four section heat generating sections 3 are provided on both sides of the central section 12 'at an interval. In this example, the width of the bent portion 12 'is 11 mm, and the width of the section heating section 3 on both sides of the section heating section 3 is an uneven heating element 1. The thickness is 7 mm each, and the width of the central section 12 ′ is 0.64 times the sum of the thickness of the section heating sections 3 on both sides.

Fig. 6 (b) is a cross-sectional view of V-V.

FIG. 6 (c) is a plan view of the heating element package in which the separator 9 is folded and the outer bag 15 is enclosed along the central section 12 ′. Figure 6 (c) is a cross-sectional view of U-U.

[0106] In Figs. 7 (a) and (b), the adhesive layer 7 is provided at both end portions on the non-venting surface side, the separator 9 is provided on the entire non-venting surface side, and the both sides of the central section 12 'are provided. This is an example of a lantern-shaped uneven heating element 1 having a constricted planar shape in which four section heating parts 3 are provided at intervals. In this example, the width of the section 12 ′ is 15 mm, the thickness of the section heating section 3 on both sides of the section 12 ′ is 6 mm, and the width of the center section 12 ′ is the section heat generation on both sides. 1.25 times the sum of the thicknesses of part 3.

Fig. 7 (c) shows a cross section of the heating element package enclosed in the outer bag, folded along the central section 12 'with the airflow side facing inward and the non-airflow side separator 9 facing outward. It is a figure FIG. 8 (a) is a plan view of the heating element 1 in which the air conditioning material 6 made of polyethylene film is fixed by an adhesive layer at the top of the section heating unit 3 and both ends in the longitudinal direction of the heating element 1. The

In this example, each heating section 3 is 1.5mm thick x 70mm long x 10mm wide, each section 3 is 30mm wide, and the width of the central section 12 ' More than 2.0 times half the sum of the thickness of the heat generating part 3.

FIG. 8B is a cross-sectional view of the heating element package in which the heating element 1 is folded in three and enclosed in the outer bag 15.

In the present invention, the air flow adjusting material means that a space is formed in at least a part of the peripheral edge of the section heat generating portion by covering the section heat generating portion with the air flow adjusting material. It adjusts the temper and also provides a heat retaining effect.

In addition, if the divided heat generating portions are interspersed, surface heat generation can be realized in a practical range. As the air conditioning material, the packaging material used for the base material and the covering material can be used. Any packaging material that is commercially available or is used for known disposable warmers or heating elements can be selected as appropriate.

The air-conditioning material of the present invention is not limited if the air flow to the segmented heat generating part is adjusted, but the air-conditioning material is not limited to the heat-generating part or the heating element body provided with the air-adjusting material. The air permeability is lower than the air permeability of the air surface.

Examples include a porous film, a nonwoven fabric, a breathable material such as a film or sheet having holes formed by perforation, and a composite such as a laminate including at least one of them as part of constituent members. Particularly preferred are films, sheets and composites provided with holes by perforation. In addition, in the local area of the ventilation control material by perforation, etc., an area (ventilation hole) having a larger air permeability than the heat generation part or the ventilation surface (ventilation hole) of the heating element is provided to increase local air permeability. May have a substantially non-breathing force or may keep air permeability lower than the air permeability of the ventilation surface of the divided heat generating portion, and may control the flow passage and flow of a gas such as air. As a result, it is possible to keep the heat of the section heat generating unit and maintain an appropriate temperature. [0108] The air-conditioning material is not limited as long as it is a plastic film or sheet having a non-breathable city area and a breathable area. However, the material constituting the air-conditioning material has conventionally been a heating element or chemical force ( The materials used in breathable storage bags (inner bags) and non-breathable storage bags (outer bags)) and the materials used in the base materials, covering materials, and outer bags described in the specification of the present invention can be used. Therefore, it may be selected as appropriate. Non-breathable films, sheets, and laminates containing them are useful films, sheets and laminates comprising vents provided by perforation. For example, a plastic film or sheet having vent holes by perforation obtained by perforating a non-breathable plastic film or sheet is an example. According to this method, the air permeability can be adjusted relatively easily by adjusting the size of the needle hole. In addition, if a plastic film or sheet with a smooth outer surface is used, when the vent hole is covered with another non-air-permeable plastic film or sheet, the plastic film or sheet is tightly bonded tightly to the periphery of the vent hole. can do.

For example, the non-breathable packaging material can be given as an example.

Further, a non-breathable air-blocking sheet made of a non-breathable packaging material or the like may be fixed with a pressure-sensitive adhesive or the like in a breathable region such as a vent hole of the air conditioning material.

By adhering the air-blocking sheet to the ventilation surface (breathable sheet) of the ventilation regulator in such a way that it can be peeled off, air (oxygen) enters the inside of the separate heat generating part from the ventilation surface during storage and transportation. Storage that does nothing can prevent heat generation during transportation. On the other hand, since air permeability can be secured by removing the air-blocking sheet from the air-conditioning material during use, it is possible to generate heat during normal use.

[0109] Although the heating element 1 described with reference to the above drawings is folded at the central section 12 ', there is no limitation as long as the section 12 is sandwiched between the section heating sections 3.

Claims

The scope of the claims

[I] A plurality of two or more divided heat generating parts formed by covering a heating composition that generates heat upon contact with air with a packaging material and bulging on both sides of the front and back are provided via the dividing part. At least a part of each section heat generating part is air permeable and can be folded at a predetermined section, and the width of the section to be bent is the sum of the thicknesses of the section heat generating sections on both sides. A heating element characterized in that the heating element is configured to be larger than 0.5 times.

[2] The heating element according to [1], wherein the predetermined section to be folded can be folded with a portion having air permeability inside.

[3] The heating element according to claim 1 or 2, wherein the number of the divided heating parts is four or more.

[4] The heating element according to any one of claims 1 to 3, wherein the divided heat generating portions are provided in a stripe shape.

[5] The heating element according to any one of [1] to [4], wherein a fixing means is provided on at least a part of the exposed portion of the heating element.

6. The heating element according to claim 4, wherein the fixing means is an adhesive layer, and a separator is provided thereon.

[7] The heating element according to any one of claims 1 to 6, wherein the heating element is folded at a predetermined section and enclosed in an outer bag which is an airtight storage bag. The heating element package according to crab.

[8] The heating element according to any one of claims 1 to 6 is folded at a predetermined section and sealed in an outer bag which is an airtight storage bag, and at least a part of the exposed part of the heating element is the outer bag. The heating element package according to any one of claims 1 to 6, wherein the heating element package is temporarily attached to at least a part of the heating element package.

9. The heating element package according to claim 8, wherein the heating element is temporarily attached in a range of 180 ° peel strength JISZ-0237) force 0.001 to 0.9 kg / 25 mm.

10. The heating element package according to any one of claims 7 to 9, wherein an opening notch is provided in a seal portion of the outer bag which is the airtight storage bag.

11. The heating element according to claim 10, wherein the notch does not contact at least a side of the outer bag that is an airtight storage bag and is provided in a seal portion of the outer bag that is an airtight storage bag. Package

