JP2007275082A - Exothermic pack, and its application method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exothermic pack which has an excellent conformability to the body of a user, and aims at the softening of the symptom of menstrual pains or the like, and to provide its application method. <P>SOLUTION: This exothermic pack has an exothermic division which is constituted of the exothermic composition molded body, and a division which is constituted of the heat-seal. The exothermic composition molded body being molded with a moldable exothermic composition which heats by coming into contact with oxygen in the air overlies a substantially flat surface-form base material. In addition, a covering material is placed, and the peripheral edge section of the exothermic composition molded body is heat-sealed. The base material and the covering material are constituted of a heat-sealable thermoplastic resin film. The base material has no pocket, a housing partition or a housing region. On the base material and/or the covering material, a ventilation means is provided in advance by perforating. The bending resistance in the longitudinal direction of the exothermic pack is 100 mm or lower, and the bending resistance rate in the shorter direction of the longitudinal direction is 50 or higher. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has flexibility, efficiently and stably transfers comfortable heat to the body, has excellent adaptability to the user's body, and relieves symptoms such as menstrual pain. The present invention relates to an intended heat pack and a method of using the same.

  Exothermic compositions that utilize the oxidation reaction of metals such as iron have been provided as powders or granules, viscous bodies, and cream bodies. Heat generation packs using them are very excellent in view of cost, safety, heat generation temperature, and the like, and have already been put into practical use, for example, as so-called chemical warmers filled in breathable bags.

In order to facilitate the mounting of the heat-generating bag, Patent Document 1 discloses that one side of the flat heat-generating bag has air permeability, and the other surface has a solid surface or a non-transfer property in an appropriate pattern. An exothermic bag has been proposed in which a pressure-sensitive adhesive layer (same meaning as the pressure-sensitive adhesive portion) is provided and the surface having the pressure-sensitive adhesive layer is attached from above the underwear.
Patent Document 2 also proposes a heat generating bag in which a pressure-sensitive adhesive layer is partially provided on the air permeable surface for the purpose of limiting the air flow rate of the air permeable packaging material and extending the heat generation duration.
In addition, Patent Document 3 discloses a heat generating bag in which an adhesive tape is attached to the peripheral portion of the heat generating bag in a belt shape, or Patent Document 4 includes a heat generating bag in which a double-sided adhesive tape is attached. Proposed. It has been suggested that the adhesive surface of these fever bags is pasted from the outside of the underwear toward the body. These exothermic bags are referred to as pasting type exothermic bags (hereinafter referred to as pasting types) and are widely used.
Further, in Patent Document 5, an adhesive portion is provided on a ventilation surface of a flat heating bag containing a heating composition or a sheet-like heating pack that generates heat upon contact with oxygen in the air. A heating bag is disclosed in which a surface is attached to the inside of an undergarment and fixed to the undergarment, and a non-adhesive surface is brought into contact with the skin to directly warm the human body.
In addition, as a heat-generating bag that improves heat transfer from the heat-generating bag to the body in the type of heat-generating bag that is attached, the heat-generating bag is made lighter and thinner, so that one side of the flat bag has air permeability and the other side An exothermic bag has also been developed in which an adhesive part is provided on the skin and the surface of the adhesive part is directly attached to the skin.
In addition, it has also been proposed (Patent Document 6) that the area of the pressure-sensitive adhesive layer be 30 to 70% for the purpose of preventing the occurrence of itching and rash on the skin when directly applied to the skin. In addition, heat-generating bags have been developed in which a moisture-containing gel layer is attached to the skin instead of the adhesive part. Since all of these heat generation bags are directly attached to the skin, they are called direct attachment type heat generation bags (hereinafter referred to as direct attachment type).
These types of heat-generating bags and direct-attached type heat-generating bags are not only heat-generating bags intended to warm up against cold, but also prevention of over-cooling due to cooling in summer, relieving menstrual pain, neuralgia, muscle pain, etc. It is also used as a medical device for the purpose of fatigue recovery.
On the other hand, in order to obtain a more comfortable feeling of use, in order to prevent the exothermic composition from becoming uneven and to fit by various shapes, thickeners and binders are used to maintain shape maintainability and heat generation characteristics. Various exothermic compositions have been proposed. For example, Patent Document 7 discloses a method for producing a heat-generating composition granulated to have an average particle diameter of 0.5 mm or more, and after granulation by adding 10 to 20 parts by weight of an adhesive binder component to added water. A method for producing an exothermic composition with improved particle strength has been proposed.
Further, Patent Document 8 proposes a disposable body warmer made of a heat-generating composition in which a powdery thickening agent such as corn starch or potato starch is added and the shape maintenance is awaited.
Patent Document 9 proposes a solid exothermic composition in which a powdery or granular exothermic composition is mixed with a binder such as CMC and compression molded.
Patent Document 10 proposes an exothermic pack that uses a cross-linking agent and a water-absorbing polymer and is pressure-integrated by pressure. Patent Document 11 proposes an ink-like or cream-like exothermic composition and exothermic pack, and a method for producing the same, using a thickener for convenience.
Further, Patent Document 12 proposes a product in which the surface of a heat-generating composition molded body using a binder is covered with a breathable film such as CMC to maintain the shape.
Further, in Patent Document 13 and Patent Document 14, the exothermic composition is changed to a sticky body or cream-like material, and the shape is changed from a conventional rectangle to a foot shape or an elliptical shape so that it can be adapted to the contour of the body to be heated. Has been proposed.
Further, there is disclosed a heat generating pack having a flexible structure in which a heat generating portion in which a heat generating composition is enclosed between packaging materials having at least one surface breathable is composed of a plurality of small heat generating portions partitioned by a seal portion. Patent Document 15 and Patent Document 16 disclose a heat generating pack comprising a heat generating portion that is filled with a powdered heat generating composition and divided into a plurality of portions by a seal portion.
Further, Patent Document 17, Patent Document 18, Patent Document 19, Patent Document 20, Patent Document 21 and Patent Document 22 use a heat generating composition using a flocculant or a dry binder and a substrate having a storage pocket. Thus, a heat generating pack in which the heat generating composition heat generating portion is divided into a plurality of sections has been proposed.

  However, these sticking type and direct sticking type heating bags have the following problems. That is, the heat-generating bag of the type that is attached to the outside of the underwear has a disadvantage that heat is not efficiently transferred to the body because it is attached from above the underwear. In addition, in order to obtain a desired warmth and a desired duration, a large amount of the exothermic composition is required. As a result, the exothermic bag becomes heavy and bulky. There was also the inconvenience that the wearing state was easy to see from the outside.

  Furthermore, among the types of heat-generating bags to be affixed, in the case of a heat-generating bag with a pressure-sensitive adhesive layer partially provided on the air-permeable surface, the air-permeability changes depending on the degree of adhesion between the body and the heat-generating bag due to changes in posture during wearing. In addition, there is a drawback that a constant temperature cannot be obtained, such as being too warm or too hot. In addition, a heat-generating bag with adhesive tape attached or a heat-generating bag with double-sided adhesive tape attached has a complicated manufacturing process, is complicated when used, and has insufficient adhesive strength. Therefore, the situation is disappearing from the market.

  In addition, the flat heating bag of the type that is affixed to the inside of the underwear does not fall off from the wearing part because it is held by the heating bag underwear, but it has only one heating part and lacks flexibility. Inside, there was a feeling of being stiff, and the feeling of use was bad. Particularly, when the size of the flat heating bag became large, it became prominent and problematic.

  On the other hand, direct-attached type heat generation bags are applied directly to the skin surface, so changes in heat generation characteristics are immediately transmitted to the skin surface of the wearing part, and it is easy to cause burns. There was a disadvantage that the heat generation characteristics had to be set lower than the desired heat generation characteristics.

  Furthermore, there are inconveniences such as feeling cold when affixing a fever bag, feeling pain when peeling, and itching or rash may be caused on the skin part. Further, when sweating during use, the adhesive part is peeled off by sweat, so that the heat generating pack falls off, and there is an inconvenience that the sweat causes discomfort.

  In addition, even when the area of the adhesive part on the surface to be applied to the skin is reduced, it has not been possible to prevent itching and rash on the applied skin part. On the other hand, in the case where a water-gel layer was used instead of the adhesive part, the coldness during use could not be eliminated. In addition, since the exothermic bag is directly attached to the skin, there is also a disadvantage that it causes an uncomfortable feeling such as a feeling of pulling due to the fact that the expansion and contraction of the skin is hindered.

  Moreover, even if the heat generating part is divided into a plurality of compartments, the heat generating composition is hardened with a coagulant aid or the like, which has a problem that heat generation performance deteriorates.

  Conventionally, exothermic packs are manufactured by a filling method, or a exothermic composition containing a flocculant or a binder is filled into a packaging material having a storage compartment in which an aggregate or a compression body is formed under reduced pressure. . In addition, it has been manufactured by preparing a filling pocket in advance in a base material, filling the pocket with a heat generating composition, covering the packaging material on the pocket, and sealing it.

In addition, when a heat-generating pack having a segmented heat-generating part is produced using a powder-like heat-generating composition or a granular heat-generating composition as a heat-generating composition, the powder-type heat-generating composition or the granular heat-generating composition is used in a method using a filling method. In order to store the product in a partially sealed bag-shaped storage body and seal the whole, there is a manufacturing limitation on the size of the divided region. That is, it is substantially impossible mechanically to produce a heat-generating pack having a plurality of small-sized segmented regions by a method of filling a powdery heat-generating composition or a granular heat-generating composition while partially sealing, The exothermic composition was mixed in the seal portion, causing problems due to insufficient sealing. In particular, continuous production of a part having a size of 20 mm or less or a small shape of 20 mm or less was virtually impossible. Further, in the method using the rotating magnet method disclosed in Patent Document 23, a complicated operation must be performed and the structure is also complicated. Therefore, the operation when forming the heat generating layer is troublesome, the apparatus to be used is complicated and expensive, it is easy to break down, troublesome maintenance, and inconvenient to handle, and further the size of the heat generating part is reduced. There was also a limit.
In the method using the pocket method, a heat generating composition containing a flocculant and a binder is used, and a dry powder mixture of a heat generating component containing a flocculant and a binder is left as it is or compressed into granules, pellets, tablets or slag. The shaped exothermic composition is previously filled into a concave pocket formed in the packaging material and compressed to create a heat generating portion. By the way, in the heat generating pack having a plurality of divided heat generating portions, the heat generation time is remarkably reduced as compared with those in which the flocculant and the binder are not mixed, and in particular, the heat generating pack has a narrow region where the shortest length is 15 mm or less. If a segmented heat generating part or a small-sized segmented heat generating part is used, the duration of heat generation is remarkably shortened, causing a problem in practical use. If it is intended to increase the duration of heat generation, it is necessary to increase the size of one segmented heat generating portion, resulting in a heat generating pack having a large size heat generating portion. Further, even when a powdery or granular exothermic composition is used, a concave pocket has to be provided in advance in the packaging material, which involves complicated operations. In addition, after encapsulating the exothermic composition in a pocket and packaging material, it is necessary to add moisture to the exothermic composition in the pocket to make the exothermic composition capable of generating heat by contact with air. It has to be provided, the process becomes complicated, and there is a problem in cost.

  In the single package form having one heat generating portion as described above, there is a problem that, for example, it is difficult to hold the adhesive and it easily falls off, or a strong discomfort is caused in mounting. Such a problem is further promoted by a decrease in flexibility due to agglomeration as the reaction of the heat generating pack proceeds. In addition, the stretched film forming the storage bag contracts and curls due to heat generation, the end of the single bag is rolled up, and the hook for holding the bag easily peels off and falls.

Japanese Utility Model Publication No. 56-34735 Japanese Utility Model Publication No. 3-96816 Japanese Utility Model Publication No. 62-119914 Utility Model Registration No. 1686986 JP 2001-198150 JP-A-9-557 Japanese Patent Laid-Open No. 4-293898 JP-A-6-343658, JP 59-189183 A International Publication No. 00/13626 Pamphlet JP-A-9-75388 JP-A-60-101448 JP-A-9-276317 Japanese Patent Laid-Open No. 11-299817 Japanese Utility Model Publication No. 1-171018 Japanese Utility Model Publication No. 6-26829 JP 2000-288008 A Japanese National Patent Publication No. 11-507593 Japanese National Patent Publication No. 11-508314 Japanese National Patent Publication No. 11-508786 Japanese National Patent Publication No. 11-512594 Special Table 2002-514104 JP 7-124193 A

  In view of the above, the present invention provides that the heat generating pack is flexible before, during and after use, is easy to attach the heat generating pack, is attached to the user's clothes on one side, and the user's skin on the other side. The heat pack comfort heat is efficiently and stably transmitted to the body, and has excellent adaptability to the user's body, intended to relieve symptoms such as menstrual pain It is to provide a heat generating pack and a method of using the same.

The exothermic pack of the present invention comprises, as described in claim 1, a laminate of a exothermic composition molded body obtained by molding a formable exothermic composition that generates heat upon contact with oxygen in air on a substantially planar substrate. Furthermore, the covering material is covered, the peripheral portion of the exothermic composition molded body is heat-sealed, and the exothermic part has a segmented exothermic part composed of the exothermic composition molded body and a segmented part composed of the heat seal. A pack,
1) The base material and the covering material are composed of a heat-sealable thermoplastic resin film,
2) The substrate has no pockets, storage compartments or storage areas,
3) The base material and / or the covering material is previously provided with breathable means by perforation,
4) A plurality of the divided heat generating portions are provided via the divided portions,
5) The moldable exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, has an easy water value of 0.01 to 20, and has a coagulant aid, a coagulant, and an agglomerate. Does not contain adjuvants, dry binders, dry binders, dry binders, adhesive materials, thickeners and excipients,
6) The bending resistance of the heat generating pack in the longitudinal direction is 100 mm or less, and the bending resistance ratio in the short direction of the direction is 50 or more.
Moreover, the heat generating pack according to claim 2 is the heat generating pack according to claim 1, wherein the bending resistance of the base material and the covering material is 200 mm or less.
The heat generating pack according to claim 3 is the heat generating pack according to claim 1 or 2, wherein the thermoplastic resin of the heat-sealable thermoplastic resin film is polyethylene, polypropylene, nylon, polyester, polyvinyl chloride. And at least one selected from materials consisting of polyvinylidene chloride, polyurethane, polystyrene, saponified ethylene vinyl acetate copolymer, ethylene vinyl acetate copolymer and mixtures thereof, and laminates thereof. .
The heat generating pack according to claim 4 is the heat generating pack according to any one of claims 1 to 3, wherein the heat-sealable thermoplastic resin film is saponified with the first side surface made of a thermoplastic resin. It is a laminate formed by a coextrusion molding having an ethylene vinyl acetate copolymer and a second side surface comprising an ethylene vinyl acetate copolymer.
Further, the heat generating pack according to claim 5 is the heat generating pack according to any one of claims 1 to 4, wherein the laminate is a laminate of a coextrusion molding of a polypropylene material and an ethylene vinyl acetate copolymer material. And the polypropylene is 10% to 90% of the total thickness of the laminate.
The heat generating pack according to claim 6 is the heat generating pack according to claim 5, wherein the polypropylene is 40% to 60% of the total thickness of the laminate.
Further, the heat generating pack according to claim 7 is the heat generating pack according to any one of claims 1 to 6, wherein the heat generating part has a plurality of divided heat generating parts provided via a dividing part, At least one of the four adjacent section heat generating portions whose points constitute a quadrilateral passes through the center line of the minimum width of the section existing between the other three section heat generating sections, and the center line Each segment heating element is sufficiently close to each other so as to block at least one end of at least one of the orthogonal lines, and at least one segment of the segment between the four adjacent segment heating elements. The width is 37.5% or less of the minimum diameter of the four adjacent heating sections.
Moreover, the heat generating pack according to claim 8 is the heat generating pack according to any one of claims 1 to 6, wherein the heat generating part has a plurality of divided heat generating parts provided via a dividing part, At least one of the three adjacent segment heat generating portions whose points form a triangle passes through the center line of the minimum width of the partition portion existing between the other two segment heat generating portions, and is one end of a straight line orthogonal to the center line So that the minimum width of the segmented portion existing between the three adjacent segment heat generating portions is 15% or less of the measured value of the minimum diameter of the segment heat generating portions constituting the triangle. It is characterized by being.
The heat generating pack according to claim 9 is the heat generating pack according to any one of claims 1 to 8, wherein the moldable heat generating composition comprises a water retention agent, a water absorbing polymer, a pH adjuster, a hydrogen generation inhibitor. , Aggregates, fibrous materials, functional materials, surfactants, organosilicon compounds, pyroelectric materials, moisturizers, fertilizer components, hydrophobic polymer compounds, heat generation aids, metals other than iron, metals other than iron oxide It is characterized by containing at least one selected from an additional component comprising an oxide, an acidic substance or a mixture thereof.
Further, the heat generating pack according to claim 10 is the heat generating pack according to any one of claims 1 to 9, wherein the moldable exothermic composition contains 30% to 80% iron powder by weight, and weight. It is characterized by comprising 3% to 25% carbon material, 0.5% to 10% reaction accelerator by weight, and 1% to 40% water by weight.
The heat generating pack according to claim 11 is the heat generating pack according to any one of claims 1 to 10, wherein the heat generating composition formed body is formed when the exothermic composition formed body is sealed in the section heat generating portion. The ratio of the divided heat generating portion volume to the volume of 0.7 to 1.0 is characterized in that
Moreover, the heat generating pack according to claim 12 is the heat generating pack according to any one of claims 1 to 11, wherein the heat generating composition molded body is compressed and has a density greater than 0.85 g / cm ^3. It is characterized by having.
A heat generating pack according to claim 13 is provided with a first outer packaging material on the covering material side of the heat generating pack according to any one of claims 1 to 12, and a second outer packaging material on the base material side. And the heat generating pack has a means made of an adhesive layer as a fixing means, and the means is located on the first face made of the first outer packaging material. The first surface has oxygen permeation means, the bending resistance in the longitudinal direction is 100 mm or less, and the bending resistance ratio in the transverse direction perpendicular to the first surface is 50 or more. .
A method of using the heat generating pack according to the present invention is a method of using the heat generating pack according to any one of claims 1 to 13 between a garment and skin, as described in claim 14. Through the adhesive layer provided on the ventilation surface, the exothermic pack is affixed to the inside of the garment, the other surface is brought into contact with the skin, and the skin temperature is increased from 32 ° C. to 50 ° C. for a period of 20 seconds to 24 hours. It is characterized by maintaining.
A method for using the heat generating pack according to claim 15 is characterized in that, in the method for using the heat generating pack according to claim 14, it is maintained at 32 ° C. to 39 ° C. in the method of use.

According to the present invention,
1) Substantially planar substrate using a substantially planar base material, a moldable exothermic composition and a mold molding method, which is not provided with a storage portion intended to store a heat generating composition such as a pocket in advance. The exothermic composition molded body, which is a molded body of the moldable exothermic composition, is laminated on the substrate, and further covered with a covering material, and the peripheral portion of the exothermic composition molded body is heat-sealed, As a result, it was possible to reduce the cost of the heat generating pack.
2) Since the uneven heat generating pack using the heat generating pack of the present invention has a divided heat generating portion composed of a plurality of divided heat generating portions through the divided portion, it has flexibility and structure maintenance and is well along the body, Stable heat generation characteristics can be maintained regardless of changes in body posture during use.
3) A heat generating pack is fixed to the inside of clothes, and the human body can be warmed by directly contacting the skin without attaching the heat generating pack to the skin by the heat generating pack that comes into contact with the body on the other side. The problem with the direct-attached heat generation pack, the coldness immediately after applying the heat generation pack, the itch and rash of the applied part, the pain when the heat generation pack is peeled off, and the heat generation bag falling off when sweating All the problems, such as sweating and not being absorbed, causing discomfort.
4) Since the heat of the heat generation pack can be efficiently transmitted to the skin, the heat generation pack can be made light and thin, and a desired duration can be obtained without feeling uncomfortable at the time of wearing. For this reason, in addition to large-sized fever packs that were difficult with flat fever packs and fever packs that take warmth to overcome the cold, prevention of poor physical condition due to summer cooling, relieving menstrual pain, neuralgia, muscle pain, etc. Also, excellent effects can be obtained as a medical device for the purpose of recovery from fatigue.

The exothermic pack of the present invention comprises a exothermic composition molded body obtained by molding a moldable exothermic composition that generates heat upon contact with oxygen in the air, and is laminated on a substantially planar substrate, and further covered with a coating material. A heat generating pack having a heat generating portion formed by heat-sealing a peripheral portion of the heat-generating composition molded body and a section heat-generating portion formed by the heat-generating composition formed body;
1) The base material and the covering material are composed of a heat-sealable thermoplastic resin film,
2) The substrate has no pockets, storage compartments or storage areas,
3) The base material and / or the covering material is previously provided with breathable means by perforation,
4) A plurality of the divided heat generating portions are provided via the divided portions,
5) The moldable exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, has an easy water value of 0.01 to 20, and has a coagulant aid, a coagulant, and an agglomerate. Does not contain adjuvants, dry binders, dry binders, dry binders, adhesive materials, thickeners and excipients,
6) The bending resistance in the longitudinal direction of the heat generating pack is 100 mm or less, and the bending resistance ratio in the short direction of the direction is 50 or more.

(1) The heat generating portion has a plurality of divided heat generating portions provided via the dividing portion, and at least one of the four adjacent divided heat generating portions whose center points form a quadrilateral is another Each section passing through the center line of the minimum width of the section that exists between the three section heat generating sections and blocking at least one end of at least one of the lines orthogonal to the center line The heat generating parts are sufficiently close to each other, and the width of at least one section between the four adjacent section heat generating sections is set to 37.5% or less of the minimum diameter of the four adjacent section heat generating sections. Excellent temperature zone characteristics can be obtained.
(2) The heat generating portion includes a plurality of divided heat generating portions provided via a dividing portion, and at least one of the three adjacent divided heat generating portions whose center points form a triangle is the other two. The section existing between the three adjacent section heat generating sections is cut off at one end of a straight line passing through the center line of the minimum width of the section section existing between the two section heat generating sections and orthogonal to the center line. By setting the minimum width of the portion to 15% or less of the measured value of the minimum diameter of the section heating portion constituting the triangle, excellent temperature zone characteristics can be obtained.
That is, by disposing the segment heat generating portion as in the above (1) and (2), the heat sealing of the segment heat generating portion is facilitated,
1) The temperature range of the heat generation pack can be changed gently without giving a large temperature difference, and the rate of temperature change between the divided heat generations can be minimized.
2) Due to the mutual warming effect between the heat generating sections, the width of the temperature difference between the maximum temperature area and the minimum temperature area of the heat generation wrap is reduced, and the overall temperature range is reduced to reduce the temperature range. Uniformity can be achieved.
3) A temperature zone in which the temperature gradually rises from the end in the long axis direction of the heat generating wrap toward the center is obtained, and comfortable warming can be performed.

Next, the heat generating pack of the present invention will be described.
The heat generating pack has a plurality of individual section heat generating parts fixed to the base material.
These divided heat generating portions are arranged at intervals from each other, and each divided heat generating portion operates independently of the remaining divided heat generating portions.
Each section heat generating part is manufactured by heat-sealing the base material and the covering material of the peripheral part of the exothermic composition molded body or the compressed body thereof. Thus, the gap is reduced to prevent the exothermic composition molded body or the compressed body from moving in the segmented heat generating portion. Furthermore, the segment heat generating portion can be prevented from being shrunk easily.
Therefore, it is more easily adapted to the user's body than providing a small number of large heat generating portions.

The base material and the covering material are made of a heat-sealable thermoplastic resin film and are made of a flexible thermoplastic resin material.
Moreover, the packaging material conventionally used can be used for the disposable warmer and the exothermic pack which use iron powder and uses the exothermic composition which heats in contact with oxygen in the air. The exothermic composition molded body or the section exothermic part containing the compressed body has high bending resistance, and the section that is a heat seal part that does not contain the exothermic composition molded body or the compressed body exists in between. The degree is low. Since the heat generating part composed of the divided heat generating part and the divided part can maintain a difference in bending resistance between about 0 ° C. and about 80 ° C., the divided part functions as a hinge and has priority over the divided heat generating part. Bend. In the heat pack composed of the divided heat generating portion and the divided portion, the divided portion functions as a hinge from the normal temperature to the time of heating (about 20 ° C. to about 60 ° C.) and bends more preferentially than the divided heat generating portion. Good bending resistance difference is still maintained during heating. As a result, the thermal pack has sufficient rigidity to maintain the structural support of the segmented heating element and prevent unacceptable stretching of the continuous layer structure during processing or use, while providing excellent rigidity when heated. The softness is still maintained.

  The bending resistance in the longitudinal direction of the heat generating pack is 100 mm or less, preferably 60 mm or less, more preferably 50 mm, still more preferably 30 mm or less, and further preferably 20 mm or less. Further, the bending resistance ratio is 2 or more. This bending resistance and bending resistance ratio are maintained at least between 20 ° C and 60 ° C.

The bending resistance of the base material and the covering material is 100 mm or less, preferably 60 mm or less, and more preferably 50 mm or less. The bending resistance of the substrate and the covering material is maintained at least between 20 ° C and 60 ° C. In the base material and the coating material, the bending resistance of the coating material can be adjusted by the type, thickness, degree of stretching, and the like.
In addition, at least a part of the base material and the covering material is air permeable.

There is no restriction | limiting as a raw material which comprises the said base material and coating | covering material, if it functions as a storage bag of a heat-generating composition. The materials normally used for chemical warmers and heat packs can be used. For example, non-breathable materials, breathable materials, water-absorbing materials, non-water-absorbing materials, non-stretchable materials, stretchable materials, stretchable materials, non-stretchable materials, foamed materials, non-foamed materials, non-heat-sealable materials Examples thereof include materials, heat-sealable materials, and the like. Films, sheets, nonwoven fabrics, woven fabrics, and the like, and composites thereof can be appropriately used depending on a desired application.
Usually, the base material is made of a non-breathable film or sheet, and the covering material is made of a breathable film, sheet or nonwoven fabric, but it may be reversed or both may be breathable. Further, the flooring material may be properly used for air permeability and non-air permeability.
The packaging material of the storage bag may have a single layer structure or a multilayer structure, and the structure is not limited. The packaging material is composed of at least a base material and a covering material, but the packaging material on which the exothermic composition molded body is laminated is the base material, and the packaging material to be covered on the exothermic composition molded body is the covering material, and has air permeability. None is irrelevant. As an example, if a non-breathable packaging material is used as a base material, and a breathable packaging material is used as a coating material, an example of a multilayer structure will be described. If the base material is A layer / B layer or A layer / B layer / C layer, Examples include those composed of A layer / B layer / C layer / D layer, and those in which the coating material is composed of F layer / G layer or E layer / F layer / G layer or F layer / H layer / G layer. . A layer is a thermoplastic resin film such as polyethylene, heat seal layer such as polyethylene or EVA, water absorbent paper, etc., B layer is a nonwoven fabric of thermoplastic resin such as nylon, non-water absorbent paper, water absorbent paper, Thermoplastic resin films such as polyethylene film, polypropylene film, polyester film, polyamide (nylon, etc.) film, core materials such as non-water absorbent paper and water absorbent paper, etc. C layer is an adhesive layer, non-water absorbent paper, Water absorbent paper, thermoplastic resin film such as polyethylene, anti-slip layer, non-woven fabric of thermoplastic resin such as polyester and nylon, D layer is separator, thermoplastic resin film such as polyethylene, non-woven fabric, E layer is heat seal layer, etc. , F layer is a porous film made of thermoplastic resin such as polyethylene or perforated film, a film made of thermoplastic resin such as polyethylene, non-water-absorbing S, absorbent paper, etc., G layer nonwoven thermoplastic resin such as polyester and nylon, H layer non-water-absorbing sheet such a water-absorbent paper, and the like. For example, as an example of a base material or a coating material, a polyethylene heat seal layer / polypropylene film using a metallocene catalyst, a polyethylene heat seal layer / polypropylene film, an EVA heat seal layer / polypropylene film, an EVA heat seal layer / polypropylene Film / adhesive layer / separator, EVA heat seal layer / polyethylene film / nylon nonwoven fabric, nonwoven fabric / porous film, polyethylene heat seal layer using metallocene catalyst / polyethylene film / nylon nonwoven fabric, polyethylene heat seal using metallocene catalyst Layer / polypropylene film / polypropylene nonwoven fabric, nonwoven fabric / (paper and / or perforated (needle, laser) film) / porous film, nonwoven fabric / (paper and / or porous film) / perforated Needles, laser) films, non-woven / (paper and / or porous film) / a nonwoven fabric, and the like as an example. There is no restriction | limiting about the lamination | stacking method of each layer, Direct lamination | stacking of each layer may be sufficient, and each layer may be laminated | stacked through a breathable adhesive layer or a laminating agent layer, and may laminate | stack by hot-melt extrusion etc. In the present invention, polyethylene produced using a metallocene catalyst is also included in polyethylene.
For example, in the case of laminating the material such as a nonwoven fabric or a porous film through a breathable adhesive layer, the breathable adhesive layer is formed by a curtain spray method in which the adhesive substance is sprayed and expanded through hot air while being heated and melted. Then, the adhesive material is made into a fiber by an appropriate method such as a melt blow method or a slot spray method, and is spread and deposited on an appropriate support substrate made of a porous film, a breathable substrate, a separator or the like to form a porous adhesive layer. An example is a method.
The thickness of the base material, the covering material, the flooring material, and the material constituting them is largely different depending on the application, but is not limited. Usually, it is 5-5000 micrometers, Preferably it is 10-500 micrometers, More preferably, it is 20-250 micrometers.
The non-breathable material is not limited as long as it has non-breathability. Films, sheets and coatings made of polymers such as polyethylene, polypropylene, nylon, acrylic, polyester, polyvinyl alcohol, and ethylene-vinyl acetate copolymer, and those obtained by laminating a metal (including semiconductor) compound such as silicon oxide or those An example is a composite material using
For example, among the non-breathable materials, examples of the highly non-breathable film include a single layer or multiple layers of a thin film of a metal or a compound containing a semiconductor on the non-breathable material film. . For example, examples of the metal containing a semiconductor include silicon, aluminum and the like, alloys and mixtures containing these metals, and the like. Examples of the metal compound containing a semiconductor include oxides, nitrides, and oxynitrides of the above metals, alloys, and mixtures. For example, a silicon oxide layer, an aluminum oxide layer, a silicon oxynitride layer or an arbitrary layer thereof laminated on a polyester film, or a laminate of a stretched polyolefin film (for example, a biaxially stretched polypropylene film) as an example. Can be mentioned.
The breathable material is not limited as long as it has breathability. For example, breathable films such as porous films and perforated films, papers, nonwoven fabrics and the like that are individually breathable, papers and at least one or more breathable films or nonwoven fabrics are laminated to impart breathability. A non-breathable packaging material with a polyethylene film laminated on a non-woven fabric with fine holes using needles, etc., and breathability is controlled by laminating fibers and thermocompression bonding Examples thereof include a non-woven fabric, a porous film, or a non-woven fabric bonded to a porous film. Here, the perforated film is a non-breathable film such as a polyethylene film provided with a fine hole with a needle to wait for breathability.
The breathability is not limited as long as heat generation can be maintained. When used for normal heating, breathable Risshi method moisture permeability by the (Lyssy method), usually at 50~10,000g ^/ m 2 ^/ 24hr, preferably 70~5,000g ^/ m 2 ^/ 24hr More preferably, it is 100-2,000 g / m < ² > / 24 hr, More preferably, it is 100-700 g / m < ² > / 24 hr.
The moisture permeability, the less heat generation amount is less than 50, it is not preferable because no sufficient heating effect can not be obtained, whereas, the safety becomes higher and the heating temperature exceeds 10,000g ^/ m 2 / 24hr This is not preferable because a problem may occur. However, you exceed 10,000g ^/ m 2 ^/ 24hr some applications, it is also not limited to use in moisture permeability near the open system in some cases.
The stretchable packaging material is not particularly limited as long as it has stretchability. That is, as long as it is stretchable as a whole, it may be a single product or a composite product composed of stretchable substrates or a combination of a stretchable substrate and a non-stretchable substrate.
For example, natural rubber, recycled rubber, synthetic rubber, elastomer, stretchable shape memory polymer and other single articles, mixtures thereof, blends of these with non-stretch materials, mixed fabrics, and fabrics composed of combinations thereof, Examples include films, yarns, strands, ribbons, tapes, scrim structure elastic films, and the like.
The porous film is not limited, but a porous film obtained by stretching a film made of a filler and a polyolefin resin such as polyethylene, linear low density polyethylene or polypropylene, a fluorine resin such as polytetrafluoroethylene, and the like. Thus, it can be appropriately selected.
The nonwoven fabric is not limited, but a single woven fabric or a single composite fiber made of materials such as rayon, nylon (polyamide), polyester, acrylic, polypropylene, vinylon, polyethylene, polyurethane, cupra, cotton, cellulose, pulp, etc. A nonwoven fabric or a mixed paper of these fibers or a laminate of heterogeneous fiber layers is used. Moreover, a dry nonwoven fabric, a wet nonwoven fabric, a spun bond, a spun lace, etc. can be used for a manufacturing method. The nonwoven fabric which consists of composite fiber of a core sheath structure may be sufficient. The nonwoven fabric on the surface in contact with the skin is preferably a brushed (fluffed) nonwoven fabric. Moreover, a stretchable nonwoven fabric and a non-stretchable nonwoven fabric can also be used.
The water-absorbing material is not particularly limited as long as it has a water-absorbing film or sheet shape.
The water-absorbing material is not particularly limited as long as the material itself has water absorption regardless of whether the material itself has water absorption or not.
Specifically, for example, a foam film / sheet having water absorbency (foamed body such as water absorbable foam polyurethane), papers, non-woven fabric or woven fabric formed from fibers having water absorbency, or fibers having water absorbency In addition to water-absorbing materials such as non-woven fabrics and woven fabrics, or water-absorbing porous films and sheets, water-absorbing agents can be used for foamed films and sheets, non-woven fabrics, woven fabrics, or porous films and sheets. Containing, impregnating, kneading, transferring or supporting to impart or increase water absorption, with or without water absorption, in foamed films and sheets, papers, nonwoven fabrics, woven fabrics or porous films and sheets, Water-absorbing material such as water-absorbing foam film / sheet, paper, nonwoven fabric, woven fabric or porous film / sheet cut into a planar shape of the present invention is applied to one or both sides of the present invention to absorb water. Is granted Thing, and the like.
In particular, in the heat generating pack of the present invention, the surface that comes into contact with the skin is a comfortable surface such as water absorbency against sweat. The material is preferably composed of a packaging material using a nonwoven fabric or a woven fabric mainly composed of water-absorbing fibers having a water retention rate of 20% or more. Examples of water-absorbing fibers having a water retention rate of 20% or more include cotton, silk, hemp, wool, polyacrylonitrile synthetic fibers, polyamide synthetic fibers, polyvinyl alcohol synthetic fibers, acetate fibers, triacetate fibers, and regenerated fibers. be able to. Furthermore, as a nonwoven fabric excellent in water absorption, a nonwoven fabric in which a superabsorbent polymer is held in the nonwoven fabric can be used. In addition, the nonwoven fabric or woven fabric which has these fibers as a main component is also a thing with a comparatively favorable touch with respect to skin.
Furthermore, a highly water-absorbing packaging material with high sweat absorbability can also be used as the packaging material. For example, a non-woven fabric containing fibers coated with a superabsorbent resin on its surface, a non-woven fabric containing hollow fibers with a large number of micropores on its surface, and a capillary action by forming a multi-sac or multi-layered cross-sectional shape, etc. A non-woven fabric or the like containing a fiber provided with slag is used.
In addition, the nonwoven fabric or film which hold | maintained the water absorbing inorganic compound can also be used for the non-adhesive surface packaging material. For example, a nonwoven fabric in which a powder of diatomaceous earth, zeolite, silica gel or the like is held on a nonwoven fabric, a film in which a relatively large amount of powder of silica, alumina or the like is held in a synthetic resin such as polyethylene can be used.

  The exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, and includes an agglomeration aid, a dry binder, an aggregating agent, an adhesive binder, a thickener and an excipient. In addition, it has surplus water with an easy water value of 0.01 to 20, has moldability with the surplus water, and the moisture in the exothermic composition does not function as a barrier layer and generates heat in contact with air. Any exothermic composition that causes a reaction is not limited.

  Further, if desired, the exothermic composition may comprise a water retention agent, a water absorbing polymer, a pH adjuster, a hydrogen generation inhibitor, an aggregate, a fibrous material, a functional material, a surfactant, an organosilicon compound, a pyroelectric material, a moisturizing material. Add at least one selected from additives, fertilizer components, hydrophobic polymer compounds, exothermic aids, metals other than iron, metal oxides other than iron oxide, acidic substances or mixtures thereof Also good.

In addition, the mixing ratio of the exothermic composition of the present invention is not particularly limited, but the reaction accelerator is 1.0 to 50 parts by weight, the water is 1.0 to 60 parts by weight, and the iron powder 100 parts by weight, carbon component 1.0-50 parts by weight, water retention agent 0.01-10 parts by weight, water-absorbing polymer 0.01-20 parts by weight, pH adjuster 0.01-5 parts by weight, hydrogen It is preferable to select the blending ratio so that the generation inhibitor is 0.01 to 12 parts by weight and the easy water value is 0.01 to 20 as the exothermic composition.
Furthermore, you may add the following to the said exothermic composition with the following mixture ratio with respect to iron powder. That is, 1.0-50 parts by weight of metal other than iron, 1.0-50 parts by weight of metal oxide other than iron oxide, 0.01-5 parts by weight of surfactant, hydrophobic polymer compound, aggregate, fiber 0.01 to 10 parts by weight for each of the state substance, functional substance, organosilicon compound and pyroelectric substance, 0.01 to 10 parts by weight for each of the moisturizer, fertilizer component, and heat generating aid, and 0.01 to 1 part for the acidic substance Parts by weight. In addition, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.
This blending ratio can also be applied to a reaction mixture and an exothermic mixture. The mobile water value of the reaction mixture is usually less than 0.01.

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 water content is 1 to 70% by weight of the exothermic composition, more preferably 1 to 60% by weight, still more preferably 7 to 60% by weight, still more preferably 10 to 50% by weight, Preferably it contains 20 to 50% by weight.
In the case of a reaction mixture and an exothermic mixture before contact treatment with an oxidizing gas, 0.5 to 20% by weight of the reaction mixture or the exothermic mixture, more preferably 1 to 20% by weight, still more preferably 3 to 20% by weight. %, More preferably 4 to 15% by weight.

The carbon component is not limited as long as it contains carbon as a component. Examples include carbon black, graphite, activated carbon, carbon nanotube, carbon nanohorn, fullerene and the like. It may have conductivity by doping or the like. Examples include activated carbon prepared from coconut shells, wood, charcoal, coal, bone charcoal, etc., and those prepared from other raw materials such as animal products, natural gas, fats, oils and resins. In particular, activated carbon having adsorption retention ability is preferable.
Moreover, as a carbon component, it does not necessarily need to exist independently, and when an iron powder containing and / or coated with a carbon component is used in a heat generating composition, the carbon component may not be present alone. The exothermic composition includes a carbon component.

  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. Metal halides include sodium chloride, potassium chloride, magnesium chloride, calcium chloride, ferrous chloride, ferric chloride, sodium bromide, potassium bromide, ferrous bromide, ferric bromide, iodide Examples thereof include sodium and potassium iodide. Examples of nitrates include sodium nitrate and potassium nitrate. An example of the acetate is sodium acetate. Examples of the carbonate include ferrous carbonate and the like. Examples of the metal sulfates include potassium sulfate, sodium sulfate, ferrous sulfate and the like.

The water retaining agent is not limited as long as it can retain water. Wood powder, pulp powder, activated carbon, sawdust, cotton fabric with many fluff, cotton short fibers, paper layers, plant material and other plant porous materials with large capillary function and hydrophilicity, activated clay, zeolite Examples thereof include hydrous magnesium silicate viscosity minerals such as pearlite, vermiculite, silica-based porous materials, fossil fossil, volcanic ash-based materials (terra balloon, shirasu balloon, taisetsu balloon, etc.). In addition, in order to increase the water retention capacity of these water retention agents, strengthen the shape maintenance power, and the like, it may be subjected to processing such as firing and / or pulverization.
The water-absorbing polymer is not particularly limited as long as it has a crosslinked structure and has a water absorption ratio of 3 times or more with respect to its own weight. Moreover, what cross-linked the surface may be used. Conventionally known water-absorbing polymers and commercially available ones can also be used.
Examples of the water-absorbing polymer include a crosslinked poly (meth) acrylic acid, a crosslinked poly (meth) acrylate, a crosslinked poly (meth) acrylate having a sulfonic acid group, and a poly (meth) having a polyoxyalkylene group. Cross-linked acrylic ester, cross-linked poly (meth) acrylamide, cross-linked copolymer of (meth) acrylate and (meth) acrylamide, copolymer of hydroxyalkyl (meth) acrylate and (meth) acrylate Cross-linked product, cross-linked polydioxolane, cross-linked polyethylene oxide, cross-linked polyvinyl pyrrolidone, sulfonated polystyrene cross-linked product, cross-linked polyvinyl pyridine, saponified starch-poly (meth) acrylonitrile graft copolymer, starch-poly (meth) acrylic acid ( Salt) Graft cross-linked copolymer, anhydrous with polyvinyl alcohol Reaction product of maleic acid (salt), cross-linked polyvinyl alcohol sulfonate, polyvinyl alcohol - acrylic acid graft copolymers, polyisobutylene maleic acid (salt) cross-linked polymer, and the like as an example. These may be used alone or in combination of two or more.
The water-absorbing polymer having biodegradability in the water-absorbing polymer is not limited as long as it is a water-absorbing polymer having biodegradability. Examples include polyethylene oxide crosslinked bodies, polyvinyl alcohol crosslinked bodies, carboxymethyl cellulose crosslinked bodies, alginic acid crosslinked bodies, starch crosslinked bodies, polyamino acid crosslinked bodies, and polylactic acid crosslinked bodies.
The pH adjuster is not limited as long as the pH can be adjusted. There are alkali metal weak acid salts and hydroxides, or alkaline earth metal weak acid salts and hydroxides. Na ₂ CO ₃ , NaHCO ₃ , Na ₃ PO ₄ , Na ₂ HPO ₄ , Na ₅ P ₃ Examples include O ₁₀ , NaOH, KOH, Ca (OH) ₂ , Mg (OH) ₂ , and Ca ₃ (PO ₄ ) ₂ .
The hydrogen generation inhibitor is not limited as long as it suppresses the generation of hydrogen. As an example, there may be mentioned at least one selected from the group consisting of sulfur compounds, oxidizing agents, alkaline substances, sulfur, antimony, selenium, phosphorus and tellurium, or two or more. Examples of sulfur compounds include compounds with alkali metals and alkaline earth metals, metal sulfides such as calcium sulfide, metal sulfites such as sodium sulfite, and metal thiosulfates such as sodium thiosulfate.
Examples of the oxidizing agent include nitrate, oxide, peroxide, halogenated oxyacid salt, permanganate, chromate and the like.
The aggregate is not particularly limited as long as it is useful as a filler and / or useful for making the exothermic composition porous. Fossil coral (coral fossil, weathered reef coral, etc.), bamboo charcoal, Bincho charcoal, silica-alumina powder, silica-magnesia powder, kaolin, crystalline cellulose, colloidal silica, pumice, silica gel, silica powder, mica powder, clay, talc, Examples include synthetic resin powders and pellets, foamed synthetic resins such as foamed polyester and polyurethane, algae, alumina, and fiber powder. Kaolin and crystalline cellulose are not included in the exothermic composition of the present invention.
The fibrous material is an inorganic fibrous material and / or an organic fibrous material, such as rock wool, glass fiber, carbon fiber, metal fiber, pulp, paper, non-woven fabric, woven fabric, cotton or hemp Examples include natural fibers, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, synthetic fibers, and pulverized products thereof.
The functional substance is not limited as long as it has a function, but at least one selected from a negative ion generating substance, a far-infrared emitting substance, and the like can be given as an example. The negative ion generating substance is not limited as long as negative ions are generated as a result, regardless of direct or indirect. Examples include tourmaline, fossilized corals, granite, co-dielectrics such as calcium strontium propionate, ores containing radioactive materials such as radium and radon. The far-infrared emitting material is not limited as long as it emits far-infrared rays. Examples include ceramic, alumina, zeolite, zirconium, silica, and the like.
Examples of the surfactant include surfactants containing an anion, a cation, a nonion and an amphoteric ion. In particular, nonionic surfactants are preferred, and polyoxyethylene alkyl ethers, alkylphenol / ethylene oxide adducts, higher alcohol phosphates, and the like are listed as examples.
The organosilicon compound is not particularly limited as long as it is a compound having a bond of at least Si—O—R and / or Si—N—R and / or Si—R. Examples thereof include organic silane compounds such as methyltriethoxysilane, dimethyl silicone oil, polyorganosiloxane, and silicone resin compositions containing them in the form of monomers, low condensates, polymers, and the like.
The pyroelectric substance is not limited as long as it has pyroelectricity (pyroelectricity or pyroelectricity). Examples include tourmaline and Iokoku mineral pyroelectric minerals. In particular, tourmaline which is a kind of tourmaline is preferable. Examples of tourmaline include drabite (mafic tourmaline), shawl (iron tourmaline), elbaite (lithia tourmaline) and the like.
The moisturizer is not limited as long as it can be moisturized. Examples include hyaluronic acid, collagen, glycerin, urea, and the like.
The fertilizer component is not limited as long as it is a component containing at least one of the three elements of nitrogen, phosphoric acid, and potassium. Examples include bone meal, urea, ammonium sulfate, lime perphosphate, potassium chloride, calcium sulfate and the like.
The hydrophobic polymer compound is a polymer compound having a contact angle with water of 40 ° or more, more preferably 50 ° or more, and further preferably 60 ° or more in order to improve drainage in the composition. There is no limit. There is no restriction | limiting also in a shape, A powder, a granule, a grain, a tablet, etc. are mentioned as an example. Examples include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, and the like.
Examples of the heat generation aid include metal powders, metal salts, metal oxides, and examples include Cu, Mn, CuCl ₂ , FeCl ₂ , manganese dioxide, cupric oxide, iron tetroxide, and mixtures thereof. As mentioned.
As the metal oxide other than iron oxide, any metal oxide may be used as long as it does not inhibit the oxidation of iron by an oxidizing gas. Examples thereof include manganese dioxide and cupric oxide.
The acidic substance may be any of an inorganic acid, an organic acid, and an acidic salt, such as hydrochloric acid, sulfuric acid, nitric acid, acetic acid, oxalic acid, citric acid, malic acid, maleic acid, chloroacetic acid, iron chloride, iron sulfate, and iron oxalate. Examples thereof include iron citrate, aluminum chloride, ammonium chloride, and hypochlorous acid.

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, oxyhydroxide and the like. Active iron powder is an iron oxide film that is at least locally formed on the surface of the iron powder. A reaction promoting effect can be obtained.
The iron powder is not limited, but cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof can be used as an example. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. The type of metal contained as an alloy is not particularly limited as long as the iron component acts as a component of the exothermic composition, but metals such as aluminum, manganese, copper, nickel, silicon, cobalt, palladium and molybdenum, and semiconductors are listed as examples. It is done. 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 metals other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the entire iron powder.

As the iron powder having an oxygen-containing film on at least a part of the iron surface,
A. An active iron powder obtained by subjecting an essential component of the exothermic composition or an acid substance or other necessary components to contact with an oxidizing gas, partially oxidizing the iron component, and at least partially oxidizing the surface of the iron component. Active iron powder having a wustite content of 2 to 50% by weight C.I. Iron powder having an iron oxide film having a thickness of 3 nm or more on the surface. An example of the active iron powder is a mixture of iron powder other than the active iron powder.

Regarding A, although the mechanism is not known in detail, an iron oxide film, that is, an oxygen-containing film is formed on the surface of the iron powder by contact of the oxidizing gas and the component, by oxidation of the component, particularly by oxidation of the iron powder. In addition, the surface of the activated carbon is oxidized and / or the oxidized iron component adheres, both are imparted with hydrophilicity, and are improved. Presumed.
That is, an iron oxide film is formed on the surface of the iron powder, the iron powder particles become irregularly shaped, distortion occurs due to oxidation, water-containing pits are formed, some kind of functional change occurs, the iron powder is It is presumed that it is activated and the heat build-up property is improved.
Further, when magnetite (Fe ₃ O ₄ ) is present in the iron oxide film, it is preferable because it is excellent in conductivity, and when hematite (Fe ₂ O ₃ ) is present, it is preferable because it becomes porous. Further, it is presumed that the surface of the carbon component is oxidized to become a carbon component having a large amount of surface oxide, the hydrophilicity is increased, and the activity is also increased.
The thickness of the iron oxide film that is an oxygen-containing film covering the surface of the iron powder is usually 3 nm or more, preferably 3 nm to 100 μnm, more preferably 30 nm to 100 μnm, using Auger electron spectroscopy. More preferably, it is 30 nm-50 micrometers, More preferably, it is 30 nm-1 micrometer, More preferably, it is 30 nm-500 nm, More preferably, it is 50 nm-300 nm. By making the thickness of the iron-containing film of iron 3 nm or more, the thickness of the iron-containing film of iron can exert the effect of promoting the oxidation reaction, and contact the oxidizing gas such as air to immediately start the oxidation reaction. Can be started. If the thickness of the iron oxygen-containing coating is 100 nm or more, the heat generation time may be shortened, but it can be used depending on the application.

Moreover, according to the said active iron powder, iron powder, a reaction accelerator, and water are essential components, the water content is 0.5 to 20% by weight, and the mobile water value indicating excess water is less than 0.01. By using the mixture, the reaction rate during the contact treatment with the oxidizing gas can be increased, and the time for increasing the temperature of the reaction mixture to 1 ° C. or more can be achieved within 10 minutes. By shortening the time to reach the predetermined temperature or higher, proper activation can be performed, and unnecessary oxidation on the iron powder can be prevented.
In addition, the exothermic composition having an easy water value of 0.01 to 50 is appropriately sticky by adding a carbon component or the like to the exothermic mixture produced by contact treatment of the reaction mixture with an oxidizing gas and adjusting the water content. It has excellent moldability and can be applied to molds such as through-molding and cast molding to produce heat-generating packs of various shapes. In particular, the exothermic composition having an easy-moving water value of 0.01 to 20 starts an exothermic reaction as soon as it comes into contact with air, has an excellent exothermic rising property, and has an excellent moldability. .
The oxidizing gas contact treatment method of the reaction mixture comprises iron powder, a reaction accelerator and water as essential components, a water content of 0.5 to 20% by weight, and a mobile water value of less than 0.01. There is no particular limitation as long as the temperature of the reaction mixture is increased to 1 ° C. or more by contact treatment with an oxidizing gas,
As a specific example,
1. A method for producing an exothermic mixture containing iron powder having a reaction mixture of iron powder, a reaction accelerator and water in an oxidizing gas atmosphere, self-exothermic reaction, partially oxidizing the iron powder, and having an iron oxide film on the surface;
2. A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, acidic substance and water is subjected to a self-exothermic reaction in an oxidizing gas atmosphere;
3. A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, carbon component and water is subjected to a self-exothermic reaction in an oxidizing gas atmosphere;
4). A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, acidic substance, carbon component and water is subjected to a self-exothermic reaction in an oxidizing gas atmosphere;
5. A method for producing an exothermic mixture containing partially oxidized iron powder, wherein the reaction mixture or exothermic mixture according to any one of 1 to 4 contains a component other than the above components, and the method according to any one of 1 to 4 is performed. ,
A method for producing an exothermic mixture, wherein the method according to any one of 6.1 to 5 is performed in an environment heated to 10 ° C. or more from the environmental temperature,
7.1 A method for producing an exothermic mixture in which the method according to any one of 1 to 6 is performed by blowing an oxidizing gas,
A method for producing an exothermic mixture by blowing an oxidizing gas heated to 10 ° C. or higher from the environmental temperature by the method according to 8.7,
A method for producing an exothermic composition in which an oxidizing gas contact treatment is performed until the maximum temperature, which is the highest point of temperature increase due to an exothermic reaction, is exceeded by the method according to any of 9.1 to
10. A method for producing an exothermic mixture in which the oxidizing gas contact treatment is performed until the temperature exceeds a maximum temperature due to an exothermic reaction and further falls by at least 10 to 20 ° C. from the maximum temperature by the method according to any one of 10.1 to 8.
11. The method according to any one of 1 to 8, wherein the oxidizing gas contact treatment is performed until the maximum temperature, which is the maximum temperature rise due to the exothermic reaction, is exceeded, and then the oxidizing gas is shut off, and at least the reaction mixture is heated. A method for producing an exothermic composition to be held until the temperature falls by at least 10 to 20 ° C. from the maximum temperature;
12. A method for producing an exothermic mixture in which the reaction mixture or the exothermic mixture described in any one of 12.1 to 5 is heated to 1 ° C. or higher in an oxidizing gas environment,
In addition, other components may be added to the exothermic mixture, and an oxidizing gas treatment may be further performed to form an exothermic mixture.
The environment of the reaction mixture during the oxidizing gas contact treatment is not limited as long as it is brought into contact with the oxidizing gas in an environment of 0 ° C. or higher and the temperature rise of the reaction mixture is set to 1 ° C. within 10 minutes. When it is performed in an open system, it may be present in a container without a lid, or may be in a state where an oxidizing gas such as air enters through a breathable sheet-like material such as a nonwoven fabric.
The oxidizing gas contact treatment may be any of stirring, non-stirring, flowing or non-flowing, and may be a batch type or a continuous type.
As the final exothermic composition,
1) An exothermic composition using the exothermic mixture produced by the method according to any one of 1 to 12 above as an exothermic composition raw material,
2) Exothermic composition obtained by adding other components to the exothermic composition of 1),
3) Exothermic composition obtained by adjusting the moisture content of the exothermic composition according to 1) or 2),
Any of these may be mentioned. In addition, there is no restriction on the order of the timing of adding the components other than the essential components and the timing of moisture adjustment. Here, the water content in the reaction mixture and the exothermic mixture before the oxidizing gas treatment is usually 0.5 to It is 20% by weight, preferably 1 to 15% by weight, more preferably 2 to 10% by weight, still more preferably 3 to 10% by weight, and further preferably 6 to 10% by weight.
The temperature of the reaction mixture after contact with the oxidizing gas is not limited as long as the temperature increase is 1 ° C. or higher, preferably 1 to 80 ° C., more preferably 1 to 70 ° C., and still more preferably. Is 1-60 ° C, more preferably 1-40 ° C.
The environmental temperature at the time of contact between the reaction mixture and the oxidizing gas is not limited as long as the temperature of the reaction mixture rises above a predetermined level, but is preferably 0 ° C or higher, more preferably 0 to 250 ° C, still more preferably. Is 10 to 200 ° C, more preferably 20 to 150 ° C, still more preferably 25 to 100 ° C, and further preferably 25 to 50 ° C.
There is no limitation as long as the time during which the temperature rise of the reaction mixture at the time of contact between the reaction mixture and the oxidizing gas is 1 ° C. or more is within 10 minutes, but it is preferably 1 second to 10 minutes, more preferably 1 Second to 7 minutes, more preferably 1 second to 5 minutes, more preferably 2 seconds to 5 minutes, further preferably 2 seconds to 3 minutes, and further preferably 2 seconds to 1 minute. .
The temperature of the oxidizing gas is not limited as long as the environmental temperature is maintained.
The oxidizing gas may be any gas as long as it is oxidizing, but oxygen gas, air, or a mixed gas of an inert gas such as nitrogen gas, argon gas, helium gas and oxygen gas can be given as an example. . The mixed gas is not limited as long as oxygen is contained, but preferably contains 10% or more of oxygen gas, and among these, air is particularly preferable. If desired, catalysts such as platinum, palladium, iridium and their compounds can be used.
The oxidation reaction can be carried out under stirring in an oxidizing gas atmosphere, optionally under pressure and / or under ultrasonic irradiation.
The optimum conditions for the oxidation reaction may be appropriately determined experimentally.
There is no restriction | limiting in the usage-amount of oxidizing gas, What is necessary is just to adjust with the kind of oxidizing gas, the kind and particle size of iron powder, a moisture content, processing temperature, a processing method, etc.
In the case of an open system, there is no limit as long as the required oxygen amount can be taken in. In order to prevent scattering of the reaction mixture and contamination of dust, the surroundings may be surrounded by a breathable material such as a nonwoven fabric or a woven fabric.
When air is used in the method of blowing oxidizing gas, as an example, the amount of air is preferably 0.01 to 1000 liters / minute, more preferably 0.01 with respect to 200 g of iron powder under 1 atm. -100 l / min, more preferably 0.1-50 l / min. In the case of another oxidizing gas, the oxygen concentration may be converted based on the case of air.
If desired, a peroxide may be added. Examples are hydrogen peroxide and ozone.
Here, the state of the reaction mixture or the exothermic mixture at the time of the contact treatment with the oxidizing gas may be either a stationary state, a moving state, or a fluidized state by stirring or the like as long as the iron powder is partially oxidized, and is appropriately selected. do it. Moreover, there is no restriction on the environment during the contact treatment with the mixed oxidizing gas at the time of mixing the components of the reaction mixture, exothermic mixture and exothermic composition and at the time of moisture adjustment, and in the oxidizing gas atmosphere or blowing of oxidizing gas, etc. Is given as an example.

The method for measuring the temperature rise of the exothermic composition is as follows.
1) The exothermic composition is allowed to stand for 1 hour in a non-breathable outer bag in an ambient temperature of 20 ± 1 ° C.
2) A magnet is provided in the vicinity of the center of the back surface of the vinyl chloride support plate (thickness 3 mm × length 600 mm × width 600 mm) of the leg support.
3) Place the temperature sensor on the center of the support plate.
4) Affixed to the support plate through the adhesive layer so that the center of the polyethylene film having a thickness of 25 μm × length 250 mm × width 200 mm with an adhesive layer of about 80 μm is at the sensor.
5) Remove the exothermic composition from the outer bag.
6) On the central part of the polyethylene film, place a template plate of length 250 mm x width 200 mm with a hole of length 80 mm x width 50 mm x height 3 mm, place a sample near the hole, and place a push-in plate The sample is moved along the template, and the sample is pushed into the punched hole. The sample is scraped along the template surface while being pushed (mold press molding), and the sample is filled into the die. Next, temperature measurement is started except for the magnet under the support plate.
The exothermic temperature is measured using a data collector, measuring the temperature for 10 minutes at a measurement timing of 2 seconds, and determining the heat generation startability with the temperature after 3 minutes.
The heat generation test of the heat generation pack shall follow the JIS temperature characteristic test.

At least part of the surface of the iron powder or active iron powder in the exothermic composition subjected to the oxidizing gas treatment is coated with an iron-containing oxygen film. The covering degree of the surface of the oxygen-containing film of iron is not limited as long as at least a part of the surface is covered, and may be the entire surface. In the case of the exothermic composition of the present invention, reaction accelerator ions such as chlorine ions are contained in the exothermic composition, and therefore there is no anticorrosive effect on the oxide film due to the corrosion effect by the ions of the reaction accelerator such as chlorine ions. An oxidation reaction which is a kind of corrosion is not inhibited. In particular, when the oxygen-containing film of iron is formed together with ions of reaction accelerators such as chlorine ions, the effect is great. When a metal other than iron is present on the surface, it suffices that at least a part of the portion other than the metal other than iron is covered with an oxygen-containing film of iron.
In the iron powder of the present invention,
1. Full surface (uniform) corrosion,
2. Pitting corrosion, crevice corrosion,
3. Stress corrosion cracking, etc.
An equal area is generated, and irregularities and gaps are also generated. For this reason, it is estimated that it has hydrophilic property and oxidation catalyst property (FeO etc.) in its part. It is important to have an oxygen-containing film on its own part, not mixing, in producing the exothermic composition. In particular, the iron component, which is a reaction accelerator and water is an essential component, and the iron component subjected to contact treatment with an oxidizing gas has a reaction active part mainly composed of oxide, hydroxide, chlorine ion, hydrogen ion, etc. It seems that exothermic reactivity and hydrophilicity are improved, and exothermic rise and moldability are remarkably improved.

About B The amount of FeO (wustite) contained in the iron component containing the predetermined amount of wustite is usually 2 to 50% by weight, preferably 2 to 40% by weight, more preferably 2 to 30% by weight. More preferably, it is 5 to 30% by weight, and further preferably 6 to 30% by weight. Even if it exceeds 50% by weight, the heat buildup is good, but the heat generation duration is shortened. If it is less than 2% by weight, the heat build-up property becomes dull.
The thickness and the amount of wustite of the oxygen-containing film of the iron powder having the predetermined amount of oxygen-containing film and wustite are applied to the exothermic composition or the exothermic composition molded body at the time of lamination.

The iron powder contains a carbon component and / or iron powder coated with a carbon component is also preferable, and the ratio of the carbon component is not limited as long as the iron component is 50% by weight or more with respect to the carbon component. An iron powder in which the iron powder surface is partially coated with a conductive carbonaceous material of 0.3 to 3.0% by weight is useful. Examples of the conductive carbonaceous material include carbon black, activated carbon, carbon nanotube, carbon nanohorn, fullerene, etc., and may be conductive by doping. The iron powder may be reduced iron powder, atomized iron powder, or the like. Sponge iron powder is mentioned as an example, and in particular, the case where the conductive carbonaceous material is activated carbon and the iron powder is reduced iron powder is useful for the heat generating pack.
In order to efficiently coat the conductive carbonaceous material, 0.01 to 0.05% by weight of oil, such as spindle oil, may be added to such an extent that the fluidity of the iron powder is not impaired.

When measuring the mobile water value of the exothermic composition in the exothermic pack and the thickness of the iron oxide film of the iron powder in the mixture and exothermic composition in the exothermic pack, and the amount of wustite, the exothermic composition and mixture are each item. According to the measurement. That is,
1) Easy water value The exothermic composition is taken out from the heat generating pack and measured according to the method for measuring the easy water value.
2) Thickness of iron oxide film of iron powder, amount of wustite In a nitrogen atmosphere, disperse the exothermic composition, exothermic composition molded body, exothermic composition compact or mixture in ion-exchanged water substituted with nitrogen, and iron with a magnet. A sample for measurement is obtained by separating powder and drying it under a nitrogen atmosphere.

The exothermic composition of the present invention has iron powder, a carbon component, a reaction accelerator, and water as essential components, and its production method can be industrially practically used, and iron powder, a reaction accelerator, and water as essential components. The reaction mixture having a water content of 1 to 20% by weight and a mobile water value indicating excess water of less than 0.01 is brought into contact with an oxidizing gas in an environment of 0 ° C. or higher, and the reaction mixture is mixed within 10 minutes. Increase the temperature to 1 ° C. or higher to produce an exothermic mixture, and use the exothermic mixture as a raw material to make an exothermic composition, or further adjust the moisture to make an exothermic composition, or add carbon components, etc. It is also possible to adjust the moisture and make a heat-generating composition.
In the present invention, the water content of the reaction mixture is set to a certain amount or less, particularly the excess water amount is set to a certain amount or less, and the oxidizing contact treatment can be performed in a short time. By specifying the amount of excess water and treating for a short time, adverse effects due to oxidizing gas contact treatment such as poor initial heat generation of the exothermic composition and shortened heat generation retention time can be avoided. A production method was established. Further, stirring or the like is not necessary during the oxidizing gas contact treatment, but the oxidizing gas contact treatment can be reliably performed by stirring or the like.
Here, the state of the reaction mixture or the exothermic mixture in the contact treatment with the oxidizing gas may be selected as appropriate as long as the iron powder is partially oxidized, whether it is a stationary state, a moving state, or a fluidized state by stirring. That's fine. Moreover, there is no restriction | limiting in the environment at the time of mixing of the components of a reaction mixture, an exothermic mixture, and an exothermic composition, and the mixing at the time of water | moisture content adjustment, For example, blowing in oxidizing gas atmosphere or oxidizing gas is mentioned as an example.

The moisture adjustment is to add water or an aqueous solution of a reaction accelerator after the exothermic mixture is contacted with an oxidizing gas. Although there is no restriction | limiting in the quantity to add, Adding the weight reduced by contact processing and adding the weight used as a desired easy water value are mentioned as an example.
Whether or not moisture adjustment is performed may be appropriately determined depending on the application.

The exothermic composition of the present invention is a raw material obtained by contact-treating a reaction mixture containing iron powder, a carbon component, a reaction accelerator and water as essential components, and an iron powder, reaction accelerator and water as essential components with an oxidizing gas. In general, the exothermic mixture is prepared with moisture, has a good exothermic rise, and is an exothermic composition having excellent moldability in combination with an appropriate amount of excess water. In addition, it is possible to produce a heat-generating pack that quickly warms up when used.
Therefore, at least iron powder, including carbon components, has a history of oxidation by contact treatment with oxidizing gas, which seems to be deeply related to excellent heat buildup, heat generation sustainability and excellent moldability. .

  When the iron powder subjected to the contact treatment with the oxidizing gas of the present invention is used, carbon components such as activated carbon in the exothermic composition can be reduced by, for example, 20% or more. By reducing the carbon component addition amount, the cost is reduced.

According to the method for producing an exothermic mixture of the present invention, an exothermic composition having excellent exothermic rising property, excellent hydrophilicity, and excellent moldability can be obtained. A heat generating composition having both excellent moldability and heat generation characteristics can be obtained by the combined use with an easy water value of 0.01 to 50, particularly 0.01 to 20.
The exothermic composition produced by the production method of the present invention has remarkably improved exothermic rise, so that the amount of carbon components such as activated carbon in the exothermic composition can be reduced by, for example, 20% or more, thereby reducing costs. Can contribute.
In addition, since the hydrophilicity is remarkably improved, the moldability using the mold is remarkably improved, so that the pieces of the exothermic composition are not scattered around the exothermic composition molded body after molding, so that the seal can be accurately obtained. And a heat generating pack with no seal breakage can be manufactured. Thereby, various shapes of exothermic composition molded bodies can be produced, and various shapes of exothermic packs can be obtained.

Moreover, the following are preferable from the viewpoint of improving the heat build-up property of the heat-generating composition.
1) An essential component of an exothermic composition or a mixture of an acidic substance or other necessary components that has been contacted with an oxidizing gas (self-heating, etc.), a water-adjusted component or other components, and mixed. , Exothermic composition.
2) One of the following active iron powders having an oxygen-containing film such as an oxide on at least a part of the surface is used as the iron powder.
a) An iron powder having an iron-containing film of iron having a thickness of 3 nm or more obtained by Auger electron spectroscopy on the surface of the iron powder.
b) Iron powder having an x-ray peak intensity ratio of wustite with iron of 2 to 50% by weight.
3) A mixture of active iron powder having an oxygen-containing film such as oxide on at least a part of the surface of the iron powder mixed with iron powder having no oxygen-containing film is used as the iron powder. In this case, it is preferable to make a mixture in which the active iron powder is 60% or more and the iron powder other than the active iron powder is less than 40%.

  When the exothermic composition treated with the oxidizing gas or the exothermic composition containing active iron powder and the one using the exothermic composition are stored for a long time, it is preferable to combine a hydrogen generation inhibitor. This is because the generation of hydrogen is suppressed, and the heat generation pack having excellent heat generation characteristics with good heat generation property without the swelling of the outer bag during storage or the like can be obtained.

  In addition, the exothermic composition other than the easy water value of 0.01 to 20 is a water-soluble polymer, an agglomeration aid, an agglomeration aid, an agglomeration aid, a dry binder, as long as it does not affect the rising characteristics Dry binders, dry binders, adhesive materials, thickeners, excipients, flocculants, soluble adhesive materials can be included.

  In addition, since the heat-generating pack that stores the heat-generating composition in the storage bag provided on the market is provided on the premise that it can be stored in the outer bag, which is a non-breathable storage bag, it can be stored for a long time. It is preferable to use the exothermic composition contained. Since the exothermic composition that has undergone the oxidizing gas contact treatment is an active composition, it is important to contain a hydrogen generation inhibitor. Further, when a pH adjuster is used in combination, the efficacy is further enhanced.

In addition, the exothermic composition having an easy water value of less than 0.01 has a coagulant aid, a coagulant, an agglomeration aid, a dry binder, a dry binder, and a dry bond as long as the reaction characteristics and heat generation characteristics are not affected. You may contain a material, an adhesive raw material, a thickener, an excipient | filler, and water-soluble polymer in the range of 0.01-3 weight part, respectively.
The agglomeration aid is an agglomeration aid described in Japanese Patent No. 3161605 (Japanese Patent Publication No. 11-508314), such as gelatin, natural gum, corn syrup and the like.
The aggregating agent is an aggregating agent described in JP-T-2002-514104, such as corn syrup and maltitol syrup.
The agglomeration aid is an agglomeration aid described in JP-T-2001-507593, such as corn syrup.
The dry binder is a dry binder described in JP-T-2002-514104, and is microcrystalline cellulose, maltodextrin, or the like or a mixture thereof.
The dry binder is a dry binder described in JP-T-2001-507593, and includes maltodextrin, sprayed lactose, and the like.
The dry binder is a dry binder described in JP-T-11-508314, and is microcrystalline cellulose, maltodextrin, or a mixture thereof.
The adhesive material or binder is an adhesive material or binder described in JP-A-4-293389, such as water glass, polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), or the like.
The thickener is a thickener described in JP-A-6-343658, such as corn starch or potato starch.
The excipient is an excipient described in JP-A-7-194441, such as pregelatinized starch and sodium alginate.
As the water-soluble polymer, a water-soluble polymer in the pressure-sensitive adhesive layer can be used.

The particle size of the water-insoluble solid component constituting the moldable exothermic composition of the present invention is not limited as long as the exothermic composition has moldability. When any one of the vertical, horizontal, and height sizes of the exothermic composition molded body obtained by molding the exothermic composition is reduced, the moldability is improved by reducing the particle size.
Furthermore, it is preferable in terms of molding to reduce the particle size of the solid component constituting the moldable exothermic composition. Among the components constituting the moldable exothermic composition, the maximum particle size of the water-insoluble solid component excluding the reaction accelerator and water is preferably 2.5 mm or less, more preferably 930 μm or less, and even more preferably 500 μm or less. More preferably, it is 300 μm or less, more preferably 250 μm or less, more preferably 200 μm or less, and 80% or more of the particle size of the solid component is usually 500 μm or less, preferably 300 μm. It is below, More preferably, it is 250 micrometers or less, More preferably, it is 200 micrometers or less, More preferably, it is 150 micrometers or less, More preferably, it is 100 micrometers or less.
In addition, the particle size of a water-insoluble solid component is a particle size which was separated from a sieve using a sieve and calculated from the diameter of the sieve. That is, the sieves are combined in the order of 8, 12, 20, 32, 42, 60, 80, 100, 115, 150, 200, 250, and 280 meshes and the tray from the top. About 50 g of water-insoluble solid component particles are put in the uppermost 8-mesh sieve and shaken for 1 minute with an automatic shaker. The weight of the water-insoluble solid component particles on each sieve and the saucer is weighed, and the total particle size is taken as 100% to obtain the particle size distribution by the weight fraction. When the total of all the saucers under the decoration of the specific mesh reaches 100%, which is the total value of the particle size distribution, the water-insoluble solid component having a size (μm) calculated from the diameter of the specific mesh The particle size of Each mesh sieve may be combined with other mesh sieves. Here, the 16 mesh pass has a particle size of 1 mm or less, the 20 mesh pass has a particle size of 850 μm or less, the 48 mesh pass has a particle size of 300 μm or less, the 60 mesh pass has a particle size of 250 μm or less, the 65 mesh pass has a particle size of 200 μm or less, 80 mesh The path has a particle size of 180 μm or less, the 100 mesh path has a particle size of 150 μm or less, the 115 mesh path has a particle size of 120 μm or less, the 150 mesh path has a particle size of 100 μm or less, and the 250 mesh path has a particle size of 63 μm or less. The same applies to the following meshes.

  Further, the exothermic composition is a powder or granular exothermic composition (easy to move water value is less than 0.01) and a formable exothermic composition (tolerant water value is 0.01 to 20) depending on the moisture adjustment state and the amount of excess water. ), A sherbet-like exothermic composition (movable water value of more than 20 and 50 or less). The exothermic composition classified according to the mobile water value is as described above.

Formability in the present invention means that a laminate of a heat generating composition can be formed in the shape of a punched hole or a concave mold by mold-through molding using a punched mold having a punched hole or casting mold using a concave mold. This shows that the molded shape of the exothermic composition molded body is maintained after molding. If there is moldability, the heat-generating composition molded body is covered with at least the covering material, and the shape is maintained until the sealing portion is formed between the base material and the covering material. The so-called sesame, which is a broken piece of the exothermic composition, is not scattered in the seal portion, so that the seal can be sealed without being broken. The presence of sesame causes poor sealing.
Next, a measurement apparatus, a measurement method, and a determination method will be described for the moldability.
1) Measuring device As for the measuring device, a stainless steel mold on the upper side of the endless belt that can be traveled (thickness 2 mm × length 200 mm × having a punched hole in which the four corners of the length 60 mm × width 40 mm are processed in the center at R5) A 200mm wide plate and a fixed scraping plate are placed, and a magnet (thickness 12.5mm x length 24mm x width 24mm, two magnets in parallel) is placed under the endless belt on the opposite side. The magnet covers an area larger than the area covered by the scraping plate and the area in the vicinity thereof and the edge (40 mm) in the direction perpendicular to the direction of travel of the punching hole of the mold.
2) Measuring method As for the measuring method, a stainless steel plate having a thickness of 1 mm × length of 200 mm × width of 200 mm is placed on an endless belt of the measuring apparatus, and a polyethylene film of thickness 70 μm × length of 200 mm × width of 200 mm is placed thereon. Furthermore, a stainless steel mold is placed thereon. Then, after fixing the scraping plate at a position of 50 mm from the advancing side end of the endless belt of the punching hole of the mold, 50 g of the exothermic composition is placed near the scraping plate between the scraping plate and the punching hole, The belt is moved at 1.8 m / min to fill the punching hole of the mold while scraping off the exothermic composition.
After the mold has completely passed through the scraping plate, the running of the endless belt is stopped. Next, the mold is removed, and the exothermic composition molded body laminated on the polyethylene film is observed.
3) Determination Method Regarding the determination method, the exothermic composition molded body having a maximum length of 300 to 800 μm without any collapsed pieces of the exothermic composition molded body having a maximum length exceeding 800 μm at the peripheral portion of the exothermic composition molded body. It is assumed that the exothermic composition has moldability when there are 5 or less pieces. The moldability is an essential property for the exothermic composition used in the molding method. Without this, it is impossible to manufacture a heat generating pack by a molding method.

The exothermic composition of the present invention has compression resistance. Here, the compression resistance is the exothermic composition having a thickness of 70% of the mold thickness by compressing the exothermic composition molded body contained in the mold. The compacted body retains an exothermic rise of 80% or more of the exothermic rise of the exothermic composition molded body before compression (temperature difference between 1 minute and 3 minutes after the start of the exothermic test of the exothermic composition). That is.
Here, a method for measuring the heat build-up property for compression resistance will be described.
1. Exothermic composition molded body 1) A magnet is provided in the vicinity of the center of the back surface of a vinyl chloride support plate (thickness 5 mm x length 600 mm x width 600 mm) of a legged support so as to cover the shape of the punched hole of the mold.
2) Place the temperature sensor on the center of the surface of the support plate.
3) A polyethylene film with a thickness of 25 μm × length 250 mm × width 200 mm with an adhesive layer having a thickness of about 80 μm is attached to the support plate via the adhesive layer so that the center of the polyethylene film comes to the sensor.
4) A length of 280 mm × width 150 mm × thickness 50 μm to 2 mm on a base plate 230 mm long × width 155 mm × thickness 25 μm to 100 μm Polyethylene is installed so that one end is substantially coincident with one end of the floorboard.
5) A template having a length of 230 mm, a width of 120 mm and a thickness of 3 mm having a punched hole of length 80 mm × width 50 mm × height 3 mm is placed on the polyethylene film on the floor plate. In that case, one end in the length direction of the template is aligned with one end where the base plate and the polyethylene film are aligned, and in the width direction, the end opposite to the side where the polyethylene film protrudes outside the base plate Further, the template is placed on the polyethylene film so that one end of the width of the template comes to the center of about 20 mm. Next, it is placed on the support plate together with the floor plate.
6) Place the sample in the vicinity of the punched hole, move the push plate along the template, put the sample into the punched hole while pushing the sample, and scrape it while pushing the sample along the die plate surface (mold push molding), mold Fill sample inside.
7) Except the magnet under the support plate, press the end of the protruding polyethylene film, remove the floor plate, and start temperature measurement.
2. Exothermic composition compression bodies 1) to 6) are the same as in the case of the exothermic composition molded body.
8) Due to the relationship between the punched hole and the unevenness, a die with a 0.9 mm thick convex part that fits almost exactly into the punched hole is aligned with the punched hole and compressed by a roll press or a plate press. A 2.1 mm exothermic composition compact is prepared in the mold (compressed to 70% of the mold thickness).
9) Place on the support plate together with the laying plate, remove the magnet under the supporting plate, further press the end of the protruding polyethylene film, remove the laying plate, and start temperature measurement.
The exothermic temperature is measured using a data collector, measuring the temperature for 5 minutes at a measurement timing of 2 seconds, and determining the compression resistance based on the temperature difference between 1 minute and 3 minutes later.
The thickness after compression is preferably 50 to 99.5% of the mold thickness, more preferably 60 to 99.5%, still more preferably 60 to 95%.
In the present invention, the exothermic composition molded body includes a exothermic composition compressed body.

As for the division | segmentation heat_generation | fever part or exothermic composition molded object of this invention, the maximum width is 0.5-60 mm normally, Preferably it is 0.5-50 mm, More preferably, it is 1-50 mm, More preferably It is 3-50 mm, More preferably, it is 3-30 mm, More preferably, it is 5-20 mm, More preferably, it is 5-15 mm, More preferably, it is 5-10 mm. The maximum height is usually 0.1 to 30 mm, preferably 0.1 to 10 mm, more preferably 0.3 to 10 mm, still more preferably 1 to 10 mm, and further preferably 2 -10 mm. The longest length is usually 5 to 300 mm, preferably 5 to 200 mm, more preferably 5 to 100 mm, still more preferably 20 to 150 mm, and still more preferably 30 to 100 mm.
The volume of the segment heat generating part or the volume of the exothermic composition molded body is usually 0.015 to 500 cm ³ , preferably 0.04 to ³⁰ cm ³ , more preferably 0.1 to ³⁰ cm ³ , More preferably, it is 1-30 cm < ³ >, More preferably, it is 3-20 cm < ³ >.
In the section heat generating section, when the section heat generating section, which is the heat generating composition storage area, is filled with the heat generating composition molded body, the volume of the heat generating composition molded body, which is the area occupied by the heat generating composition molded body, and the heat generating composition storage. The volume ratio with the volume of the segmented heat generating portion that is the region is usually 0.6 to 1, preferably 0.7 to 1, more preferably 0.8 to 1, and still more preferably 0.9 to 1. 1.0.
Further, the width of the divided portion, which is the interval between the divided heat generating portions, is not limited as long as it can be divided, but is usually 0.1 to 50 mm, preferably 0.3 to 50 mm, more preferably 0.3 to 50 mm. More preferably, it is 0.3-40 mm, More preferably, it is 0.5-30 mm, More preferably, it is 1.0-20 mm, More preferably, it is 3-10 mm.
In addition, although the shape of the said exothermic composition molded object or a division | segmentation exothermic part may be what, a planar shape, a circle, an ellipse, a polygonal shape, a star shape, a flower shape etc. are mentioned as an example. For solid shapes, polygonal pyramid shape, conical shape, frustum shape, spherical shape, parallelepiped shape, cylindrical shape, semi-cylindrical shape, semi-elliptical cylinder shape, bowl shape, cylindrical shape, elliptical cylinder shape, etc. Is given as an example. In addition, these shapes may be provided with rounded corners, the corners may be curved or curved, or the center may have a recess.
The volume of the exothermic composition part molded body of the present invention means the volume of the exothermic composition molded body or the compressed exothermic composition molded body.
Moreover, the volume of a division | segmentation heat_generation | fever part means the internal volume of the division | segmentation heat_generation | fever part which accommodated the exothermic composition molded object.

  The segmented heat generating portion having the above-described components is formed by laminating a heat generating composition molded body obtained by molding a moldable heat generating composition by a molding method on a base material, covering the base material, and heating the peripheral portion of the heat generating composition molded body. Typically formed by sealing. Preferably, each section heating part has a similar amount of exothermic composition molded body and also has similar oxygen permeation means. However, the amount of exothermic composition molded body, the shape of the segment heating element, and the oxygen permeability should be classified as long as the resulting segmental heating element temperature is within the accepted treatment and safety range for the intended use. It can be different for each heating part.

  The rate, duration and temperature of the exothermic oxidation reaction of the exothermic composition molding are controlled as desired by changing the contact area with air, more specifically by changing the diffusion / permeability of oxygen. . Preferably, each section heat generating portion has the same oxygen permeation means as the heat generating composition molded body having the same volume. Alternatively, the volume, shape, and oxygen permeation means of the exothermic composition molded body can be changed for each section heating section as long as the resulting section heating section temperature is the same.

  There is a first outer wrapping material on the first surface of the heat generating pack, which is attached to the substrate by a first adhesive layer. There is a second outer wrap on the second surface, which is attached to the substrate by a second adhesive layer. Preferably, the first outer packaging material and the second outer packaging material are made of the same material, and the first adhesive layer and the second adhesive layer are made of the same material.

  The first outer packaging material and the first adhesive layer are preferably more air permeable than in the covering material. Furthermore, the first outer packaging material and the first adhesive layer preferably do not change to such an extent that the oxygen permeability of the coating material can be sensed. Therefore, only the covering material controls the flow rate of oxygen to each divided heat generating portion.

  Moreover, when providing an outer packaging material on the outer side of a base material and a covering material, there is no limitation, but it is preferable to provide it via an adhesive layer or an adhesive layer. In particular, it is preferable to provide via an adhesive layer. The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive, and the pressure-sensitive adhesive layer can be used.

  The fever pack of the present invention easily fits and sustains a wide range of body contours, provides convenient and comfortable heat delivery and excellent compatibility with body shape, while the pack does not fold or bulge during use. Prevents the occurrence and maintains sufficient rigidity to prevent easy exfoliation of the contents of the segmented heat generating part.

  Further, the heat generating pack includes a plurality of individual section heat generating sections, and the individual section heat generating section typically has a heat-generating composition molded body, preferably accompanied by a specific iron oxidation reaction, and further to the heat generating pack. It has predetermined physical dimensions and encapsulation characteristics that are fixed at intervals along it. Since the heat generating pack consisting of heat generating parts consisting of a divided heat generating part and a divided part is inflexible in the divided heat generating part and flexible in the divided part, the dividing works as a hinge between the divided heat generating parts. Turn preferentially over club. This allows the thermal pack to maintain structural support of the segment heating element, prevent unacceptable stretching of the structure of one or more continuous layers during processing or use, and to the contents of the segment heating element. Since easy access is prevented, the one or more heat generating packs are effective and effective by having excellent adaptability with the user's body when incorporated into the heat generating pack of the present invention.

  Furthermore, when the inventor incorporates a segmented heat generating portion in the heat generating pack of the present invention, the base material, the coating material, and the heat generating composition constituting the heat generating portion of the present invention in one or a plurality of heat generating packs. By properly selecting the material of the molded article or its compression body, the shape and arrangement of the segmented heat generating part, and orienting it to the stiffness of the thermal pack, the oriented stiffness is supported by the structural support of the heating pack. Found to increase. That is, if it is flexible in all directions, the heat generating pack having the fixing means by the adhesive layer is rounded when fixed to the body, and the heat generating pack itself is fixed by the adhesive layer, which makes handling difficult. By providing inflexibility in one direction and flexibility in the other direction, the heat generating pack can be accurately fixed to the body, maintaining flexibility during use, and obtaining a heat generating pack with excellent handling and use feeling. .

  Furthermore, the present invention provides a sustained skin temperature of about 32 ° C. to about 50 ° C. by applying the fever pack of the present invention to a body part that is an affected part of a human having pain such as muscle pain using the pack. Maintaining a period of about 20 seconds to about 24 hours, preferably maintaining the skin temperature from about 32 ° C. to about 43 ° C. for a period of 1 hour or longer, prolonging the release from such pain, the human skeleton with pain A method of treating acute, repetitive, and / or chronic pain, including muscle and / or pain as described above.

  The first outer wrapping material is preferably a soft flexible material. Suitable materials for the first outer wrapping include, but are not limited to, molded films, woven fabrics, knits and non-woven fabrics, which include card nonwoven fabrics, spunbond nonwoven fabrics, air-twisted nonwoven fabrics, heat bonded nonwoven fabrics, water A twisted nonwoven fabric, a melt-swelled nonwoven fabric, and / or an air penetration adhesive nonwoven fabric. The material composition of the first outer packaging material is cotton, polyester, polyethylene, polypropylene, nylon, or the like. A particularly suitable material for the first outer wrapping is a carded heat bonded fabric of hydrophobic polypropylene.

  The second outer wrapping material is a material that is soft and easy to swell and does not irritate the skin. Suitable materials for the second outer wrapping include, but are not limited to, molded films, woven fabrics, nits and non-woven fabrics, which are card non-woven fabrics, spunbonded non-woven fabrics, air-twisted non-woven fabrics, thermobonded non-woven fabrics. A water-twisted nonwoven fabric, a melt-swelled nonwoven fabric, and / or an air-penetrating bonded nonwoven fabric. The material of the second outer packaging material is cotton, polyester, polyethylene, polypropylene, nylon or the like. A particularly suitable material for the second outer wrapping is a polypropylene carded heat bonded fabric.

  Further, the bending resistance of the outer packaging material is preferably 100 mm or less, more preferably 60 mm or less, and still more preferably 50 mm or less. The bending resistance of the outer wrapping material is preferably maintained at least between 20 ° C and 60 ° C. The bending resistance of the outer packaging material can be adjusted by the type, thickness, degree of stretching, and the like.

The fixing means is not limited as long as it has a fixing ability that can fix a thermal packaging body for a joint peripheral part or a heating part to a required part.
Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners such as Velcro, magnets, bands, strings, etc., and combinations thereof, which are generally employed as the fixing means, can be arbitrarily used.
In the case of a band, the adjustment fixing means may be further configured by a combination of a hook-and-loop fastener and an adhesive layer.
Here, the hook-and-loop fastener is known by a trade name such as Velcro (registered trademark), Velcro fastener (registered trademark), Velcro fastener, hook and loop tape, and the like. It has a fastening function in combination with a hook that is a male fastener that can be fastened. Examples of the material having the loop function include a nonwoven fabric and a woven fabric of yarn having fluff and traps. The surface of the core material forming the band may be coated with a material having the loop function (female fastener function). However, it may constitute a band by itself. The hook member, which is a male fastener member, is not particularly limited, and examples thereof include those formed from polyolefin resins such as polyethylene and polypropylene, polyamide, polyester, and the like. The shape of the hook is not particularly limited, but hooks having a cross-sectional shape of I-shaped, inverted L-shaped, inverted J-shaped, so-called mushrooms, etc. are easily caught on the loop, and the skin is extremely irritating Is preferable in that Note that the hook may be adhered to the entire area of the fastening tape, or the tape base may be omitted and only the hook may be used as the fastening tape.
The pressure-sensitive adhesive layer is composed of a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organosilicon compound, a hydrophobic polymer compound, a pyroelectric material, an antioxidant, an aggregate, a fibrous material, a moisturizing agent, and a function. You may contain at least 1 sort (s) chosen from the additional component which consists of a sex substance or these mixtures.
The pressure-sensitive adhesive of the present invention is classified into a non-hydrophilic pressure-sensitive adhesive, a mixed pressure-sensitive adhesive, and a hydrophilic pressure-sensitive adhesive (gel etc.).
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 and clothes, and is solvent-based, aqueous-based, emulsion-type, hot-melt-type, reactive, Various forms such as a pressure-sensitive system, a non-hydrophilic adhesive, and a hydrophilic adhesive are used.
The pressure-sensitive adhesive layer includes a non-hydrophilic pressure-sensitive adhesive layer composed of the non-hydrophilic pressure-sensitive adhesive and a non-hydrophilic pressure-sensitive adhesive layer composed of the non-hydrophilic pressure-sensitive adhesive.
The non-hydrophilic pressure-sensitive adhesive layer containing a water-absorbing polymer or a water retention agent and having improved water absorption is treated as a non-hydrophilic pressure-sensitive adhesive layer.
A hot melt adhesive may be provided between the hydrophilic adhesive layer and the substrate or the covering material.
In addition, there is no restriction when the hydrophilic adhesive is provided in the joint peripheral thermal package, and the hydrophilic adhesive layer may be provided in the joint peripheral thermal package after the joint peripheral thermal packaging is sealed. Good.
Moreover, as an adhesive layer, even if it has air permeability, it may not have air permeability. What is necessary is just to select suitably according to a use. As the air permeability, it is sufficient if the air permeability is as a whole. For example, a pressure-sensitive adhesive layer in which a pressure-sensitive adhesive partially exists, a part in which a pressure-sensitive adhesive does not exist is partially present, and the whole region has air permeability is given as an example.
When the pressure-sensitive adhesive is laminated on the air-permeable base material and / or the covering material as it is, as a method of maintaining the air-permeability, for example, the pressure-sensitive adhesive layer is partially formed by printing or transferring the pressure-sensitive adhesive. Laminate and use the non-laminated part as a ventilation part, and move the adhesive in a two-dimensional direction, such as moving it in one direction or zigzag while drawing a circle in the form of a thread. Examples include a method in which the gap between the pressure-sensitive adhesives has air permeability or moisture permeability, a method of foaming the pressure-sensitive adhesive, or a layer formed by a melt blow method.
The pressure-sensitive adhesive constituting the non-hydrophilic pressure-sensitive adhesive layer is an acrylic pressure-sensitive adhesive, a vinyl acetate-based pressure-sensitive adhesive (vinyl acetate resin-based emulsion, ethylene-vinyl acetate resin-based hot melt pressure-sensitive adhesive), a polyvinyl alcohol-based pressure-sensitive adhesive, or a polyvinyl acetal-based pressure-sensitive adhesive. Adhesive, vinyl chloride adhesive, polyamide adhesive, polyethylene adhesive, cellulose adhesive, chloroprene (neoprene) adhesive, nitrile rubber adhesive, polysulfide adhesive, butyl rubber adhesive, silicone rubber Examples of such adhesives include styrene-based adhesives, styrene-based adhesives (for example, styrene-based hot melt adhesives), rubber-based adhesives, silicone-based adhesives, etc. Among these, adhesive strength is high, inexpensive, and long-term stability. Rubber adhesives, acrylics, etc. Adhesives containing adhesive or a hot melt polymer material is desired.
In addition to the base polymer, other components such as rosins, coumarone indene resins, hydrogenated petroleum resins, maleic anhydride-modified rosins, rosin derivatives or C5 petroleum resins may be added to the pressure-sensitive adhesive. Tackifiers such as petroleum resins typified by cyclic petroleum resins, and phenolic tackifiers such as terpene phenolic resins, rosin phenolic resins, alkylphenolic resins (particularly tackifiers having an aniline point of 50 ° C. or lower) ), Softening agent such as coconut oil, castor oil, oil oil, camellia oil, liquid paraffin, softener, anti-aging agent, filler, aggregate, adhesion regulator, adhesion improver, colorant, antifoaming agent, Thickeners, modifiers and the like may be blended as appropriate to improve performance such as improved adhesion to nylon clothing and blended fabric clothing.
Examples of the hot-melt pressure-sensitive adhesive include known hot-melt pressure-sensitive adhesives that have been imparted with tackiness. Specifically, for example, an ABA block type copolymer such as SIS, SBS, SEBS, or SIPS can be used. Styrenic adhesive with polymer as base polymer, vinyl chloride adhesive with vinyl chloride resin as base polymer, polyester adhesive with polyester as base polymer, polyamide adhesive with polyamide as base polymer, acrylic resin Acrylic-based pressure-sensitive adhesive with a base polymer, polyolefin-based pressure-sensitive adhesive with a base polymer such as polyethylene, ultra-low density polyethylene, polypropylene, ethylene-α olefin, ethylene-vinyl acetate copolymer, 1,2-polybutadiene 1,2-polybutadiene as a base polymer -Based pressure-sensitive adhesives, polyurethane-based pressure-sensitive adhesives based on polyurethane, pressure-sensitive adhesives composed of these modified materials with improved adhesiveness and stability, or mixtures of two or more of these pressure-sensitive adhesives It is done. Moreover, the adhesive layer comprised from the adhesive layer comprised from the foamed adhesive and the bridge | crosslinking of an adhesive can also be used.
The non-aromatic hot-melt pressure-sensitive adhesive is not particularly limited as long as the base polymer does not contain an aromatic ring. Examples include olefinic hot melt adhesives and acrylic hot melt adhesives. Non-aromatic polymers that are base polymers that do not contain an aromatic ring include polymers and copolymers such as olefins and dienes. An example is an olefin polymer. The olefin polymer is a polymer or copolymer of ethylene or α-olefin. Moreover, what added dienes, such as a butadiene and isoprene, as another monomer is also good.
The α-olefin is not particularly limited as long as it is a monomer having a double bond at the terminal, and examples thereof include propylene, butene, heptene, hexene, octene and the like.
The aromatic hot-melt pressure-sensitive adhesive is a hot-melt pressure-sensitive adhesive whose base polymer contains an aromatic ring, such as a styrene-based hot-melt pressure-sensitive adhesive represented by an ABA block copolymer. Is given as an example.
In the A-B-A type block copolymer, the A block is a monovinyl-substituted aromatic compound A such as styrene or methylstyrene, which is an inelastic polymer block, and the B block is the elasticity of a conjugated diene such as butadiene or isoprene. More specifically, for example, a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS), or a hydrogenated type thereof (SEBS, SIPS). In addition, these may be used in combination.
A pressure-sensitive adhesive layer in which a water-absorbing polymer is further blended with the non-hydrophilic pressure-sensitive adhesive can be used as a measure for preventing a decrease in pressure-sensitive adhesive force due to an increase in water content of the non-hydrophilic pressure-sensitive adhesive layer.
The hydrophilic pressure-sensitive adhesive constituting the hydrophilic pressure-sensitive adhesive layer is not particularly limited as long as it has a hydrophilic polymer or a water-soluble polymer as a main component, has adhesiveness, and is hydrophilic as the pressure-sensitive adhesive.
As a component of the hydrophilic pressure-sensitive adhesive, hydrophilic polymers such as polyacrylic acid, water-soluble polymers such as sodium polyacrylate and polyvinylpyrrolidone, cross-linking agents such as dry aluminum hydroxide and metal aluminate metasilicate, Softeners such as glycerin and propylene glycol, higher hydrocarbons such as light liquid paraffin and polybutene, primary alcohol fatty acid esters such as isopropyl myristate, silicon-containing compounds such as silicone oil, fatty acid glycerin esters such as monoglyceride, olive oil, etc. Oily ingredients such as vegetable oils, preservatives such as methyl paraoxybenzoate and propyl paraoxybenzoate, solubilizers such as N-methyl-2-pyrrolidone, thickeners such as carboxymethylcellulose, polyoxyethylene hydrogenated castor oil, Sorbitan fatty acid es Surfactant such as rutile, oxycarboxylic acid such as tartaric acid, light anhydrous silicic acid, water-absorbing polymer, excipient such as kaolin, moisturizer such as D-sorbitol, sodium edetate, paraoxybenzoic acid ester and tartaric acid Examples include stabilizers, cross-linked water-absorbing polymers, boron compounds such as boric acid, water, and the like. Moreover, it is comprised from these arbitrary combinations.
The temporary sealing part is formed through an adhesive layer, but the adhesive constituting the adhesive layer is a layer formed of a polymer composition that has tack at room temperature, and can be heat-sealed after temporary attachment. There is no limitation.
Moreover, the adhesive of the said adhesive layer can use the adhesive which comprises the adhesive layer used for temporary attachment for convenience. A non-hydrophilic adhesive is preferred. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer has good compatibility with the heat seal material constituting the heat seal, and the melting point of the base polymer of the pressure-sensitive adhesive 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. Moreover, 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.
The adhesive layer for fixing the air flow adjusting material is composed of a commonly used adhesive or pressure-sensitive adhesive. In particular, the pressure-sensitive adhesive is useful, and the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer can be used.
Further, the method for providing the adhesive layer is not limited as long as the air flow adjusting material can be fixed, and may be provided on the entire surface, or may be provided partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape are listed as examples.
Moreover, when the adhesive layer is a hydrophilic adhesive layer, if there is a difference in moisture retention between the hydrophilic adhesive layer and the exothermic composition molded body, a packaging material such as a substrate between them Moisture movement takes place via this, and inconvenience occurs for both. This happens especially during storage. In order to prevent this, the packaging material interposed between them preferably has a moisture permeability of at least 2 g / m ² / day in terms of moisture permeability according to the Lissy method (Lyssy 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 a range that does not affect the heat generation performance. However, the moisture permeability by the rissy method (Lyssy method) is usually 2 g / m ² / day or less, preferably 1.0 g / m ² / day or less, more preferably 0.5 g ^/ m and a 2 / day or less, more preferably from 0.01 to 0.5 g ^/ m 2 / day. Here, it is a value under the conditions of 40 ° C. and 90% RH under atmospheric pressure. In addition, the said moisture-proof packaging material can be used as a base material or a covering material, and may be laminated on a base material or a covering material alone.
The moisture-proof packaging material is not limited as long as moisture transfer between the exothermic composition molded body and the hydrophilic pressure-sensitive adhesive layer can be prevented, but a metal vapor-deposited film, a metal oxide vapor-deposited film, a metal foil laminate film, EVOH ( (Ethylene / vinyl alcohol copolymer, saponified ethylene / vinyl acetate copolymer) film, biaxially stretched polyvinyl alcohol film, polyvinylidene chloride coated film, poly (vinylidene chloride) coated on a base film such as polypropylene Metal foil such as vinylidene chloride coated film, aluminum foil, non-breathable packaging material formed by vacuum deposition or sputtering of metal such as aluminum on polyester film substrate, silicon oxide, aluminum oxide on flexible plastic substrate One packaging laminate using a transparent barrier film with a structure And the like as. Non-breathable packaging materials used for the outer bag and the like can also be used.
In addition, a packaging material such as a moisture-proof packaging material disclosed in Japanese Patent Application Laid-Open No. 2002-200108 can also be used, and the description is incorporated into the present invention.
When a water-containing hydrophilic pressure sensitive adhesive (gel, etc.) is used for the pressure sensitive adhesive layer, a reaction accelerator such as sodium chloride in the heat generating composition is used to adjust the water balance between the heat generating composition and the pressure sensitive adhesive layer. The content of a substance capable of securing moisture such as a water-absorbing polymer is in the range of 10 to 40% by weight, preferably in the range of 15 to 40% by weight, more preferably 15 to 30% by weight, based on the exothermic composition. You may adjust in the range.
Examples of the pressure-sensitive adhesive having good moisture permeability and low irritation to the skin include water-containing pressure-sensitive adhesives (hydrophilic pressure-sensitive adhesives and gels) such as JP-A-10-265373 and JP-A-9-87173. No. 6-145050, JP-A-6-199660, adhesives that can be hot-melt coated, and rubber-based adhesives described in JP-A-10-279466 and JP-A-10-182408 Are also useful and are incorporated herein by reference in their entirety.
The functional substance to be included in the pressure-sensitive adhesive layer is not limited as long as it has a function, but it is a fragrance compound, plant extract, herbal medicine, fragrance, slimming agent, analgesic, blood circulation promoter, swelling improving agent, Antibacterial agent, bactericidal agent, fungicide, deodorant, deodorant, transdermal drug, lipolytic component, negative ion generator, far-infrared radiator, magnetic substance, poultice, cosmetics, bamboo vinegar or An example is at least one selected from wood vinegar and the like.
Specifically, aromatic compounds such as menthol and benzaldehyde, plant extracts such as mugwort extract, herbal medicines such as mugosa, fragrances such as lavender and rosemary, slimming agents such as aminophylline and tea extract, indomethacin, d1-camphor Analgesics such as acidic mucopolysaccharides, chamomiles and other blood circulation promoters, swelling improvement agents such as horse chestnuts and flavones, boric acid water, physiological saline, alcoholic water and other poultices, peanut extract, cafe Lipolytic components such as in, tonalin, aloe extract, vitamins, hormones, antihistamines, amino acids and other cosmetics, carboxylic acid derivatives, boric acid, iodine, inverse soap, salicylic acid substances, sulfur, antibiotics, etc. Examples of the antibacterial agent, bactericidal agent, and fungicidal agent.
The percutaneous absorbable drug is not particularly limited as long as it is percutaneously absorbable, but corticosteroids, anti-inflammatory analgesics, hypertensive agents, anesthetics, hypnotic sedatives, tranquilizers, antibacterial agents Sexual substances, antifungal substances, skin irritants, anti-inflammatory agents, antiepileptics, analgesics, antipyretics, anesthetics, bactericides, antimicrobial antibiotics, vitamins, antiviral agents, swelling-improving agents, diuretics, blood pressure Examples include hypotensive agents, coronary vasodilators, antitussive expectorants, slimming agents, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, blood circulation promoters, local anesthetics, lipolytic components, and mixtures thereof. However, it is not limited to these. These drugs are used alone or in combination of two or more as required.
The content of this drug is not particularly limited as long as it can be expected to have a medicinal effect, but from the viewpoints of pharmacological effect, economic efficiency, adhesive strength, etc., the content of transdermally absorbable drug is Preferably it is 0.01-25 weight part with respect to 100 weight part of adhesives, More preferably, it is 0.5-15 weight part.
Moreover, about the method of providing an adhesive layer, if the thermal packaging body for joint surrounding parts can be fixed, there will be no restriction | limiting, You may provide in the whole surface, and you may provide partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape are listed as examples.

  The heat generating pack is folded with the second surface inside the fold and the outer surface exposed to the inside of the package, and an outer bag which is a non-breathable storage bag is enclosed. The exothermic pack is removed from the outer bag, and oxygen reacts with the exothermic composition molded body to generate heat. This heat generating pack is compact and portable.

  By placing the attachment means as a breathable layer on the same surface, the heat generating pack of the present invention is worn inside the user's clothes and is in direct contact with the user's body.

  Prior to use, the heat generating pack is sealed in an outer bag, which is an oxygen-impermeable storage bag, for storage, transportation, and the like. The outer bag is not limited as long as it is non-breathable, and may be laminated. For example, OPP, CPP, polyvinylidene chloride, metal oxides such as aluminum oxide and silicon oxide (including semiconductors), etc. Examples include moisture-proof nylon, polyester, and polypropylene films, and aluminum foil or aluminum-deposited plastic films. As an example, a heat generating pack in which the manufactured heat generating pack is sealed between two non-breathable films or sheets can be cited as an example.

  The exothermic composition in the present invention is molded by a mold molding method such as a die-through molding method or a cast molding method. The maximum width of the section heat generating portion is 1 to 20 mm and the maximum diameter is 1 to 20 mm (the one having two or more diameters such as an ellipse is the shortest diameter such as a short diameter) by selecting a mold. The maximum height is 0.1 to 20 mm, the interval between the divided heat generating portions is adjusted to 1 to 20 mm, and the base material and the covering material have a heat seal layer, and at least one of the heat seal layers An adhesive layer made of an adhesive is provided on the substrate, and the base material, the exothermic composition molded body, and the coating material are temporarily attached to the base material and the coating material through the adhesive layer at the periphery of the exothermic composition molded body. After forming the temporary seal part, the temporary seal part is sheet-sealed to form a heat seal part. Moreover, it heat-seals narrower than the width | variety of the said temporary adhering seal | sticker part, and it opens by moving a heat-generating composition to the area | region which is not heat-sealed within a temporary adhering | sealing part after that. This stabilizes the heat-generating composition molded body, facilitates full-scale sealing by heat sealing, eliminates seal misalignment, etc., realizes high-speed, thin-line heat sealing width without sealing, and separates heat generating parts. It is possible to classify the heat generating portion without deteriorating the heat generation characteristics such as a decrease in heat generation time due to. The outer packaging material is provided in the heat generating pack to manufacture the heat generating pack, but the opening may be performed at the time of manufacturing the heat generating pack or after the manufacturing.

  The mold-through molding method uses a punching die, and laminates a molding machine that stacks a punching-shaped exothermic composition molded body on a long base material and a long covering material. Using a rotary sealer that can seal the part and the peripheral part of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), the peripheral part and the section of the exothermic composition molded body through the sealer For example, a continuous forming method in which a necessary portion of the part is heat sealed and sealed.

  The casting molding method is a molding method in which a heat-generating composition molded body is laminated on a long base material by filling a casting mold having a concave portion and transferring it to the base material. In the case of the continuous type, by filling the concave portion with the drum-shaped rotating body and transferring it to the base material, the molding machine for laminating the exothermic composition molded body on the long base material and covering it with a long covering material, Using a rotary sealer that can seal the target section and the periphery of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), For example, a continuous forming method in which necessary portions of the edge portion and the divided portion are heat sealed and sealed.

  Moreover, you may use a magnet for shaping | molding of the heat-generating composition of this invention. When the magnet is used, the exothermic composition can be easily accommodated in the mold and the molded body can be detached from the mold, and the exothermic composition molded body can be more easily molded.

  Note that a heat-generating pack may be manufactured by providing a breathable pressure-sensitive adhesive layer at least between the heat-generating composition molded body and the covering material. When a breathable pressure-sensitive adhesive layer is provided at least between the exothermic composition molded body and the coating material, the restriction is limited as long as a breathable pressure-sensitive adhesive layer exists between at least the exothermic composition molded body and the coating material. Absent. For example, it may be provided on the surface of the covering material facing the exothermic composition molded body, or a breathable pressure-sensitive adhesive layer is provided on the exothermic composition molded body or the laminated exothermic composition molded body and the base material, and the covering material As an example, temporary attachment by pressurization between the heat-generating composition molded body and / or the substrate may be mentioned.

  In addition, between the base material and the exothermic composition molded body laminated on the base material and the covering material are temporarily attached by an adhesive layer, and then the peripheral portion of the exothermic composition molded body and the peripheral portion of the exothermic pack are heat sealed. This enables a high-speed manufacturing method for heat generating packs.

  In the present invention, the heat seal material constituting the heat seal layer may be a single material or a composite material having a heat seal layer, and there is no limitation as long as at least a part of the heat seal material can be joined by heating. For example, polyolefins such as polyethylene and polypropylene, and olefin copolymer resins, ethylene-vinyl acetate copolymer resins, ethylene hot-melt resins such as ethylene-acrylic acid ester copolymer resins such as ethylene-isobutyl acrylate copolymer resins, Polyamide hot melt resin, butyral hot melt resin, polyester hot melt resin, polyamide hot melt resin, polyester hot melt resin, polymethyl methacrylate hot melt resin, polyvinyl ether hot melt resin, polyurethane hot melt resin Examples thereof include hot melt resins such as polycarbonate hot melt resins, vinyl acetate, vinyl chloride-vinyl acetate copolymers, and films and sheets thereof. Moreover, what mix | blended various additives, such as antioxidant, can also be used for hot-melt-type resin and its film and sheet | seat. In particular, low density polyethylene and polyethylene using a metallocene catalyst are useful.

In the present invention, the temporary attachment means that when the exothermic composition molded body is sandwiched between the base material and the covering material, at least the base material and the covering material are adhered through an adhesive layer made of an adhesive, It refers to weak pressure-sensitive adhesion or adhesion for holding the exothermic composition molded product stored until sealing.
In addition, the term “opening” refers to releasing temporary wearing by moving the exothermic composition in the end heat sealing portion region to the region in the temporary sealing portion after heat sealing.
The temporary sealing part is formed through an adhesive layer, but the adhesive that constitutes the adhesive layer is a layer formed of a polymer composition that has tack at room temperature, and there is a limitation if heat sealing after temporary attachment is possible Absent.
Moreover, as an adhesive which comprises the adhesive layer used for temporary attachment, although the adhesive of the said adhesive layer can be used, a non-hydrophilic adhesive is preferable. The pressure-sensitive adhesive constituting the viscous layer is preferably compatible with the heat seal material constituting the heat seal, and the melting point of the base polymer of the pressure-sensitive adhesive is preferably equal to or lower than the melting point of the heat seal material. In particular, a hot melt adhesive is preferable. Moreover, 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, there is no restriction | limiting in the method of providing the adhesion layer for temporary attachment, You may provide in the whole surface, and may provide partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape are listed as examples.

  In addition, the present invention typically applies heat to specific areas of the human body suffering from such pain, thereby providing the muscle, skeleton, and / or body of the body referred to as such. It includes methods for treating acute, repetitive and / or chronic body, knee pain, including pain. The method preferably takes about 20 seconds to about 24 hours, preferably about 20 minutes to about 20 hours, on the troubled part of a human suffering from such pain, preferably the abdomen or physiology, with the fever pack described above, More preferably, the skin temperature is about 32 ° C. to about 50 ° C. for a human knee suffering from such pain by applying for about 4 hours to about 16 hours, most preferably about 8 hours to about 12 hours, Preferably having a method of maintaining from about 32 ° C to about 45 ° C, more preferably from about 32 ° C to about 42 ° C, most preferably from about 32 ° C to about 39 ° C, and most preferably from about 32 ° C to about 37 ° C. In this case, the maximum skin temperature and the skin temperature are set so that the desired therapeutic effect is achieved without any problems such as skin burns that may be caused by using high temperatures for long periods of time. The length of time for maintaining the high skin temperature, it is possible to appropriately select the person in need of such treatment. Preferably, the method provides a sustained skin temperature for a human body having acute, repetitive and / or chronic body pain, including muscle, skeleton and / or mentioned body pain. 32 ° C to about 43 ° C, preferably about 32 ° C to about 42 ° C, more preferably about 32 ° C to about 41 ° C, most preferably about 32 ° C to about 39 ° C, and most preferably about 32 ° C to about 37 ° C. For a period of about 1 hour or more, preferably about 4 hours or more, more preferably about 8 hours or more, more preferably about 16 hours or more, and most preferably about 24 hours. Significantly relieve acute, repetitive and / or chronic body pain, including skeletal, muscle and / or bodily pain such as abdominal pain and / or menstrual pain mentioned, and from the user's troubled body parts Heat source Even after such treatment, the pain relief is significantly prolonged for at least about 2 hours, preferably at least about 8 hours, more preferably at least about 16 hours, most preferably at least about 1 day, and most preferably at least about 3 days. Includes methods.

The easy water value is a value indicating the amount of surplus water that can move out of the exothermic composition in the water present in the exothermic composition. This easy water value is demonstrated using FIG. 12 thru | or FIG. As shown in FIG. 12, NO. 8 in which eight lines are written at 45 degree intervals radially from the center point. 2 (JIS P 3801 type 2) filter paper 25 is placed on a stainless steel plate 29 as shown in FIGS. 13 and 14, and a hollow cylindrical hole 27 having an inner diameter of 20 mm and a height of 8 mm is formed at the center of the filter paper 25. A sample plate 26 having a length of 150 mm and a width of 100 mm is placed, a sample 28 is placed in the vicinity of the hollow cylindrical hole 27, the push plate 22 is moved along the mold plate 26, and the sample 28 is pushed into the hollow cylindrical shape. The sample is scraped along the surface of the mold plate 26 (mold press molding). Next, a non-water-absorbing 70 μm polyethylene film 24 is placed so as to cover the hole 27, and a stainless steel flat plate 23 having a thickness of 5 mm × length of 150 mm × width of 150 mm is placed thereon so that no exothermic reaction occurs. And hold for 5 minutes (FIG. 15). Thereafter, the filter paper 25 is taken out (FIG. 16), and the soaking locus of water or aqueous solution is set as a distance 30 from the circumferential portion 31 that is the edge of the hole of the hollow cylinder to the soaking tip along the radial line. Read in mm. Similarly, the distance 23 is read from each line to obtain a total of 8 values. Each of the eight values read (a, b, c, d, e, f, g, h) is taken as a measured moisture value. The arithmetic average of the eight measured moisture values is taken as the moisture value (mm) of the sample. In addition, the water content for measuring the true water value is the blended water content of the exothermic composition or the like corresponding to the weight of the exothermic composition or the like having an inner diameter of 20 mm × height of 8 mm, and only water corresponding to the water content is used. Measured in the same manner, and calculated in the same manner as the true water value (mm). The value obtained by dividing the moisture value by the true moisture value and multiplying by 100 is the easy water value. That is,
Easy water value = [moisture value (mm) / true water value (mm)] × 100
Five points are measured for the same sample, the five easy water values are averaged, and the average value is taken as the easy water value of the sample. In addition, when measuring the mobile water value of the exothermic composition in the exothermic pack, 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 the present invention, the exothermic composition molded body obtained by molding the exothermic composition having an excess water amount of 0.01 to 20 is easily laminated on the base material and covered with a covering material, at least the periphery of the exothermic composition molded body. A heat-generating pack can be obtained simply by sealing the part. It is not necessary to add moisture after being stored in a packaging material such as a base material or a covering material. Therefore, since the process is remarkably simplified, there is an advantage in cost.
The mobile water value (0-100) in this invention is 0.01-20, More preferably, it is 0.01-18, More preferably, it is 0.01-15, More preferably, it is 0.00. It is 01-13, More preferably, it is 1-13, More preferably, it is 3-13.
The exothermic pack using the exothermic composition molded body obtained by molding the exothermic composition with the surplus water of the present invention as a linking substance, the exothermic composition is a coagulant aid, dry binder, coagulant, etc. The appropriate amount of surplus water represented by a mobile water value of 0.01 to 20 is used as the linking substance.
When the surplus water in the exothermic composition reaches an appropriate amount, the hydrophilic groups in the composition components are hydrated by dipolar interactions or hydrogen bonds, and also have high structural properties around the hydrophobic groups. Is presumed to exist. As a result, it is estimated that sandy sand is formed, and moldability of the exothermic composition occurs. This is connected water which is a connected substance in some sense. In addition to this, there is also water in a state that can be called free water, and if excess water increases, the structure will soften and free water will increase. In addition, the dominant factors that cause iron powder to oxidize are the amount of water present and the amount of oxygen supplied to the iron powder surface. It is said that water is not sufficient at an adsorbed water film (less than 100 mm) and the oxidation rate is low. When the adsorption film is about 1 μm, the amount of water becomes sufficient. Further, since the water film is thin, it is easy to supply oxygen to the surface of the iron powder, and a high oxidation rate is exhibited. When the film becomes thicker and the adsorbed film exceeds 1 μm, it is estimated that the oxygen supply amount decreases. The present invention was completed by obtaining the knowledge that the mobile water value representing the optimum water content indicating the moldability and oxidation rate above a certain level is 0.01-20.
That is, by using an appropriate amount of surplus water, each component particle is held together by the surface tension of moisture, causing the exothermic composition to form, and the moisture does not substantially function as a barrier layer. Generates heat when in contact with. Furthermore, by using an exothermic composition using active iron powder or an active exothermic composition, the exothermic rising property is remarkably excellent, and a exothermic composition having high moldability is obtained. Moreover, it generates heat without moving the moisture in the exothermic composition molded body produced by the molding lamination method to the packaging material or the water absorbent sheet. Furthermore, by providing a plurality of segmented heat generating parts in which the heat generating composition molded body is divided by the seal part, the heat generating pack itself has flexibility, so that it can be applied to places where flexibility is required such as human body parts and curved objects. It is possible to provide a heat generating pack that is excellent in wearing and excellent in feeling of use.
Further, in the base material, the covering material and the exothermic composition molded body, at least the covering material and the exothermic composition molded body are temporarily attached via an adhesive layer, and then the peripheral portion of the exothermic composition molded body and the exothermic heat. Since the heat sealing reliability is improved by heat-sealing the pack peripheral portion, it is possible to increase the speed of manufacturing the heat generating pack and reduce the heat seal width.

The moldability of the present invention means that a molded product of a heat generating composition can be formed in the shape of a punched hole or a concave mold by mold-through molding using a punched mold having a punched hole or casting mold using a concave mold. This shows that the molded shape of the exothermic composition molded body is maintained after molding.
If there is moldability, the heat-generating composition molded body is covered with at least the covering material, and the shape is maintained until the sealing portion is formed between the base material and the covering material. Since so-called sesame which is a broken piece of the exothermic composition is not scattered in the seal portion, the seal can be sealed without being broken. The presence of sesame causes poor sealing.
1) As a measuring device,
A stainless steel mold (60 mm long x 40 mm wide, 4 mm thick, 2 mm thick x 200 mm long x 200 mm wide plate) with a punched hole at the center is R5 on the upper side of the endless belt that can run A scraping plate is disposed, and magnets (thickness of 12.5 mm × length of 24 mm × width of 24 mm are arranged in parallel in the lower side) on the opposite side of the endless belt.
The magnet covers an area larger than the area (40 mm) of the maximum cross section with respect to the direction of travel of the punching hole of the mold, and the area in the vicinity thereof.
2) As a measurement method,
A stainless steel plate having a thickness of 1 mm × length of 200 mm × width of 200 mm is placed on an endless belt of the measuring device, a polyethylene film of thickness of 70 μm × length of 200 mm × width of 200 mm is placed thereon, and a stainless steel mold is further formed thereon. Put.
Then, after fixing the scraping plate at a position of 50 mm from the advancing side end of the endless belt of the punching hole of the mold, 50 g of the exothermic composition is placed near the scraping plate between the scraping plate and the punching hole, The belt is moved at 1.8 m / min to fill the punching hole of the mold while scraping off the exothermic composition. After the mold has completely passed through the scraping plate, the running of the endless belt is stopped. Next, the mold is removed, and the exothermic composition molded body laminated on the polyethylene film is observed.
3) As a judgment method,
In the peripheral portion of the exothermic composition molded body, there is no collapsed piece of the exothermic composition molded body having a maximum length exceeding 800 μm, and the number of collapsed pieces of the exothermic composition molded body having a maximum length of 300 to 800 μm is within 5 pieces. In this case, the exothermic composition has formability.
This is an essential property for the exothermic composition used in the molding method. Without this, it is impossible to manufacture a heat generating pack by a molding method.

In the present invention, the term “substantially planar” refers to a flat surface that does not have storage recesses such as storage pockets, storage compartments, and storage areas that are provided in advance to store the heat generating composition. Accordingly, irregularities that do not intentionally contain the exothermic composition may exist.
The pocket of the present invention is a storage pocket provided in advance in the packaging material for storing the exothermic composition, and is a pocket as described in JP-T-2001-507593. Since the unevenness | corrugation which is not for accommodating the intentional exothermic composition molded object is not a pocket, even if such an unevenness | corrugation exists in a base material, it is set as a substantially planar base material.
The storage compartment is a storage compartment provided in advance for the packaging material in order to store the exothermic composition. It is a parcel. Since the unevenness | corrugation which is not for storage of the intentional exothermic composition molded object is not a storage division, even if such an unevenness | corrugation exists in a base material, it is set as a substantially planar base material.
The storage area is a storage area provided in advance for the packaging material to store the exothermic composition. Is an area. Since the unevenness | corrugation which is not for storage of the intentional exothermic composition molded object is not a storage area, even if such an unevenness | corrugation exists in a base material, it is set as a substantially planar base material.

The bending resistance in the present invention refers to rigidity (harness, stiffness) or flexibility, and is the same as that except that the exothermic pack itself was used as a sample in accordance with the JlS-L-1096A method (45 ° cantilever method). It is what I followed. That is, one side of the heat generating pack is placed on the smooth base with a 45-degree slope at one end so as to match the scale baseline. Next, the heat generating pack is gently slid in the direction of the slope by an appropriate method, and when the center point of one end of the heat generating pack is in contact with the slope A, the position of the other end is read on the scale. The bending resistance is indicated by the length (mm) that the heat generating pack has moved. Each of the five heat generating packs is measured, and the average value of each direction in the vertical direction and the horizontal direction, or in one direction and the direction perpendicular thereto. Represents the bending resistance (up to integers). However, when the measurement is performed such that the pressure-sensitive adhesive side surface of the heat generating pack with the pressure-sensitive adhesive layer is opposed to the horizontal table side surface, the pressure-sensitive adhesive side surface with a separator is opposed to the horizontal table side surface. In any case, the measured value on the side where the minimum bending resistance is measured is adopted.
Also,
1) The heat generating part containing the heat generating composition of the heat generating pack should remain at least 5 mm wide and 20 mm long on the horizontal table. However, the length should traverse the region where the exothermic composition is present, or linearly intersect the region where the exothermic composition is present and the region where the exothermic composition is not present.
2) In the case of an exothermic pack with an adhesive layer, a plastic film having a bending resistance of 30 mm or less as a separator for the adhesive layer, or a plastic having a thickness of 50 μm or less, preferably 25 μm or less, and having no waist or lightly wrinkled. Use a soft film, such as a film, and follow the adhesive layer. Moreover, the bending resistance of a base material and / or a coating | covering material produces a 100 mm x 200 mm test piece, and employs the bending resistance in a 200 mm direction.
In the present invention, the bending resistance in at least one direction is usually 100 mm or less, preferably 80 mm or less, more preferably 50 mm or less, still more preferably 30 mm or less, and further preferably 20 mm or less.

In the present invention, the bending resistance ratio of the heat generating pack or the heat generating portion is the bending resistance ratio with respect to the entire length of the heat generating pack or the heat generating portion in one direction, and is calculated by the following equation.
Flexural modulus = (A / B) × 100
A: Bending softness of heat generating pack or heat generating part in one direction B: Total length of heat generating pack or heat generating part in one direction In the present invention, the bending resistance ratio in at least one direction is usually 50 or less, preferably 40 Or less, more preferably 30 or less.

  In the present invention, the bending resistance ratio is a ratio of bending resistance in one direction to bending resistance in a direction orthogonal to the thickness direction of the heat generating pack or the heating portion to a small bending resistance. The bending resistance ratio is preferably 2 or more.

In the case of a heat generating pack having segmented heat generating portions provided at intervals in the form of streaks in the present invention, the parallel hexahedron shaped heat generating portion in which the absolute value of the difference in bending resistance in two directions that are perpendicular to each other is maximized. A heat generation pack provided with streaks spaced apart, a heat generation pack further provided with an adhesive layer, and a heat generation pack provided with the adhesive layers spaced apart in a streak form are very Since it is flexible and rigid in one direction, it has the effect of relieving symptoms such as stiff shoulders, back pain, and muscle fatigue, and particularly relieving symptoms of menstrual pain. Furthermore, it can be wound in the width direction of the heat generating pack with a size of almost the width dimension, is compact, and is convenient for storage. In the case with a separator, the separator can be wound by using a separator having low bending resistance.
In addition, the body has many secondary curved surfaces, including the case where a heat generation pack is provided along the body, and the shoulders, legs, belly, waist, arms, etc. are almost linear in one direction, and the other two directions Is built almost from a curved surface. Accordingly, the heat generating pack according to the present invention, which can form a curved surface in one direction, and can be curved in the other two directions, can form a two-dimensional curved surface. Ideal for symptom relief and treatment.
In addition, the heat generating pack of the present invention can provide a heat generating part that is flexible and exhibits a uniform temperature distribution and a heat generating part that exhibits a pattern temperature distribution by adjusting the size and interval of the convex section heat generating parts. The pot effect of the heating part can be improved by the pattern temperature distribution.
In the heat generating pack having the divided heat generating portion, the minimum bending resistance of the bending resistance on the surface orthogonal to the thickness direction is preferably 50 mm or less, more preferably 40 mm or less, further preferably 30 mm or less, Preferably it is 5-30 mm.
This bending resistance and bending resistance ratio are maintained at least between 20 and 60 ° C.

The water retention rate is measured and calculated by the following method. About 1 g of sample fiber that has been cut to a length of about 5 cm and well opened is immersed in pure water. After 20 minutes (20 ° C.), the water between the fibers is rotated at 2000 rpm using a centrifugal dehydrator. Remove. The weight (W1) of the sample thus adjusted is measured. Next, the sample is dried to a constant weight in a vacuum dryer at 80 ° C., and the weight (W2) is measured. Calculate the water retention rate using the following formula.
Water retention rate (%) = [(W1-W2) / W2] × 100
In the present invention, a water retention rate of 20% or more is preferable.

Hereinafter, embodiments of the heat generating pack will be described with reference to the drawings.
FIG. 1 is a plan view of an embodiment of a heat generating pack having a breathable surface according to the present invention.
FIG. 2 is a cross-sectional view taken along the line ZZ in FIG. 1 and shows a stacked structure of the heat generating pack.
FIG. 3 shows the manufacturing process of the segmented heat generating part using a part of the enlarged portion of the heat generating pack.
FIG. 4 shows a manufacturing process of another divided heat generating portion using a part of the heat generating pack that is enlarged.
FIG. 5 is a perspective view of another heat generating pack of the present invention. The mold includes a partial random range of the air-permeable surface of the heat generating section of the heat generating pack and is provided with a cobweb-like adhesive layer as a whole.
FIG. 6 is a cross-sectional view taken along line YY of FIG. 5 and shows a laminated structure of a heat generating pack, an adhesive layer, and a protective separator for the adhesive layer.
FIG. 7 shows an embodiment in which the base of the heat generating pack is breathable.
FIG. 8 is a plan view of an embodiment of a heat generating pack having an adhesive and air-permeable surface according to the present invention, showing the shape of the divided heat generating portion and the stripes of the fixing adhesive layer provided in the divided portion.
FIG. 9 is a cross-sectional view taken along line XX of FIG. 8 and shows a laminated structure of the heat generating pack, the pressure-sensitive adhesive layer, and the protective separator for the pressure-sensitive adhesive layer.
FIG. 10 is a plan view of a female panty viewed from the waist, showing the thermal pack placed on the front of the panty so that when the panty is worn, the thermal pack transfers heat to the user's abdomen. Yes.
FIG. 11 is a cross-sectional view of the thermal pack of FIG. 1, showing the thermal pack folded into a non-breathable package.

  As shown in FIGS. 1 and 2, the heat generating pack 1 has a plurality of divided heat generating portions 3. The divided heat generating portion 3 is formed by laminating a heat generating composition molded body 2 molded on a planar base material 6 and further covering the outer periphery of the heat generating composition molded body 2 after covering with a covering material 7. It is formed by doing. There is substantially no difference between the base material 6 and the covering material 7, and the base material 6 is the one on which the exothermic composition molded body 2 is first laminated. The air permeability may be at least one of the base material 6 and the covering material 7, but the base material 6 is normally non-breathable and the covering material 7 has air permeability.

  The plurality of divided heat generating portions 3 are separated from each other and exist independently. The exothermic composition molded body 2 is densely accommodated in each of the divided heat generating portions 3. Since the division part 4 exists between the adjacent exothermic composition molded bodies 2, it is possible to follow the contour of the body more than the exothermic pack 1 having a large exothermic part. The exothermic composition molded body 2 may be present in the sectioned heat generating portion 3 after being compressed. The divided heat generating portion 3 does not bend easily, but can be bent at the divided portion. Each section heat generating part 3 preferably has substantially the same amount of exothermic composition molded body 2 and air permeability.

FIG. 3 shows an example of the production process. FIG. 3A shows a non-breathable base material 6, FIG. 3B shows a laminate of the moldable composition molding 2, and FIG. (D) is the heat generated by heat-sealing the outer peripheral portion of the exothermic composition molded body 2 to form the divided heat generating portion 3 and the divided portion 4. It is a pack.
FIG. 3 (e) shows a breathable coating material 7 provided with a breathable first outer packaging material 10 via a breathable first adhesive layer 8, and a non-breathable substrate 6 with a second bond. FIG. 4 is a partially enlarged view of the heat generating pack 1 provided with a second outer packaging material 11 via a layer 9. FIG. 3F is a partially enlarged view of the heat generating pack 1 in which the separator 13 is provided on the air permeable first outer packaging material 10 via the air permeable adhesive material layer 12A.

4 (a) to 4 (d) are other examples of the manufacturing process, except that the base material 6 provided with air permeability by previously perforating 5 is used, and a non-breathable material is used for the covering material 7. Is an example of producing the heat generating pack 1 in the same manner as in FIG.
FIG. 4E shows a non-breathable covering material 7 provided with a first outer packaging material 10 via a first adhesive layer 8, and a breathable base material 6 with a breathable second adhesive layer 9. Fig. 3 shows a partially enlarged view of the heat generating pack 1 provided with a breathable second outer packaging material 11. FIG. 4 (f) is a partially enlarged view of the heat generating pack 1 in which the separator 13 is provided on the breathable first outer packaging material 10 via the breathable adhesive material layer 12 </ b> A.

The material of the base material 6 or the covering material 7 is not limited as long as a thermoplastic resin film is an essential component, including those using a metallocene catalyst, and coated with polyethylene, polypropylene, polyester film, styrene block copolymer, film. Nonwoven fabrics and permeable membranes can be used. In this embodiment, a low density polyethylene film having a thickness of 0.001 inch (0.025 mm) is used for the substrate 6. When providing the ventilation part 5 in the base material 6 or the covering material 7, it is preferable to provide a plurality of openings. Specifically, the opening 5 is provided by piercing the base material 6 and / or the covering material 7 with a heated needle to open a hole. The size of the opening 5 is preferably from about 0.1 mm to about 0.08 mm in diameter, and the number of the openings 5 is preferably 20 to 60 per section heating portion. As a method for creating another opening, a method of pricking with a cold needle, a vacuum generation method, a high-pressure water jet generation method, or the like can be used. Furthermore, it may be made from a microporous membrane or a semipermeable membrane by combining with a porous carrier material. Breathability, moisture permeability by Risshi method (Lyssy method), usually at 50~10,000g ^/ m 2 ^/ 24hr.

In the case shown in FIG. 5, the heat generating pack 1 described above is accommodated in an outer packaging material. FIG. 6 shows a cross-sectional view of FIG.
5 and 6 are provided with a cobweb-like pressure-sensitive adhesive layer 12 provided by a melt blow method, a curtain spray method, or the like. The pressure-sensitive adhesive is adjacent to the first outer packaging material 10 so that the pressure-sensitive adhesive 12 remains preferentially in the first outer packaging material 10 when the heating pack 1 is removed from the clothes of the user after use. It is desirable to embed between three. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 12 is non-breathable. However, as described above, the pressure-sensitive adhesive layer 12 is air-permeable by providing a spider web, a line, or randomly. be able to.

A second outer packaging material 11 is also provided on the substrate 6 side via an adhesive layer 9.
And the 1st surface 16 of the heat pack 33 is affixed on clothes, and the opposite surface 17 is located in the body side.
Here, the first outer packaging material 10 and the adhesive layer 8 for bonding the first outer packaging material 10 are more permeable to the air than the covering material 7. Furthermore, the oxygen permeability of the coating material 7 is preferably not changed significantly. Thereby, the air permeability of the covering material 7 can adjust the flow rate of oxygen to each section heat generating part 3.

  A separator 13 may be provided to protect the pressure-sensitive adhesive layer 12. The adhesive material layer 12 preferably has a stronger bond to the outer packaging material 10 than the adhesive force to the surface of the separator or the adhesion target. Further, an adhesive layer 12 for clothing is provided on the first surface 16, but is preferably a linear adhesive or fibrils.

  The heat generation performance is improved by increasing the air permeability of the section heat generating portion 3 by the air permeability amount lower than the air permeability of the first outer packaging material 10 and the first adhesive layer 8 and the air permeability of the pressure-sensitive adhesive layer 12. It may be.

The position, area ratio, shape, and air permeability of the adhesive layer and the pressure-sensitive adhesive layer provided on the air permeable surface are as follows.
The position is not particularly limited, but it is preferable to disperse it uniformly on the air-permeable adhesive surface in order to efficiently attach it to clothes with a small area. In order to form a breathable pressure-sensitive adhesive surface, for example, a pressure-sensitive adhesive is partially provided in advance on a breathable packaging material, or a needle hole is opened after the pressure-sensitive adhesive is applied to almost the entire surface of a non-breathable packaging material. There are methods such as making it breathable.
The ratio of the area is usually 5 to 95%, preferably 20 to 70% of the entire area of the air-permeable adhesive surface. If it is less than 5%, the outer packaging material 10 and the heat generating pack 1 are easily peeled off. On the other hand, if it exceeds 95%, it is difficult to form a vent hole.
Regarding the shape, the adhesive layer and the pressure-sensitive adhesive layer can be provided in a polka dot shape, a spot shape, a turtle shell shape, a stripe shape, or a lattice shape, and the shape is not particularly limited.
Further, the amount of the adhesive applied per unit area is not particularly limited. The application distribution of the pressure-sensitive adhesive is not particularly limited, but in order to make the heat generation characteristics uniform, it is preferable to set a substantially uniform air permeability state on the entire air-permeable surface, and the pressure-sensitive adhesive application distribution is also Those having a substantially uniform distribution are advantageous.

The air permeability of the air-permeable adhesive surface means air permeability in a state where an adhesive or a pressure-sensitive adhesive is applied, and the air-permeable surface provided with the adhesive layer or the air flow provided with the pressure-sensitive adhesive layer. The sticky adhesive surface hits the above. Its air permeability moisture permeability by Risshi method (Lyssy method), usually at 50~10,000g ^/ m 2 ^/ 24hr, preferably 70~5,000g ^/ m 2 ^/ 24hr, more preferably 100 to 2,000g ^/ m 2 ^/ 24hr, more preferably from 100~700g ^/ m 2 ^/ 24hr.

Alternatively, the adhesive layer 12 may be a sticky film or a mechanical fixing means. In this case, the separator 13 may be excluded as long as it is attached to the adherend surface under conditions such as a predetermined pressure.
The above is the same when the base material 6 has air permeability instead of the covering material 7.
FIG. 7 shows an example in which the base material 6 side of the heat generating pack 1 is made air permeable, and the separator 11 is provided on the entire surface of the base material 6 via a spider web-like adhesive layer 9.

  8 and 9 show another embodiment of the thermal pack 1. The pressure-sensitive adhesive layer 12 is a straight parallel stripe extending from the upper end to the lower end at the section of the heat generating pack, and this pressure-sensitive adhesive layer 12 is provided on the first outer packaging material 10 side. As a method of providing the pressure-sensitive adhesive layer 12, there is a belt-like coating or printing by curtain spray. With this configuration, oxygen can be passed through the section heat generating section 3. Separator 13 is preferably silicone-treated paper.

  FIG. 10 shows a panty 18 having a crotch 19 and a front panel 20. The thermal pack 1 is preferably placed in the direction of the upper end located near the waistband of the panty 18. In this case, the thermal pack 33 works as a thermal pack for relieving menstrual pain. The usage method of the heat pack 1 is not limited. As another method of use, a fever pack is wrapped around the neck and the back of the neck is warmed, so that it can be used as a fever pack for reducing eye fatigue or a fever pack for reducing headache.

  As shown in FIG. 11, in the case of storage or transportation, the thermal pack 1 is folded and stored in a non-breathable outer bag 21 so that the first base 6 side of the thermal pack 1 is inside.

Although the heat pack 1 is mainly fixed to the inside of clothes and the other side is used in contact with the body, the normal use temperature is 39 ° C. to 45 ° C. in order to maintain the temperature of 39 ° C. to 45 ° C. The required oxygen permeability is very low.
The divided heat generating portion 3 of the present invention is composed of, for example, a heat generating composition molded body 2 having a size of major axis 40 mm × minor axis 20 mm and a thickness of 3 mm and 2.8 grams. The breathable at 400g ^/ m 2 ^/ 24hr at moisture permeability of Risshi method, when exposed to 1 atm at 20 ° C. air, produces a temperature of about 41 ° C. for about 8 hours. This permeability is achieved by 26 openings having a diameter of 0.5 mm in the base material 6 or the covering material 7 constituting the divided heat generating portion 3.

The top view of one Example of the exothermic pack of this invention Sectional view of ZZ (A)-(f) 1 implementation process schematic diagram of manufacture of the exothermic pack and exothermic pack of this invention (A)-(f) 1 implementation process schematic diagram of manufacture of the exothermic pack and exothermic pack of this invention The perspective view of the other Example of the heat generating pack of this invention. Sectional view of YY Sectional drawing of the other Example of the heat generating pack of this invention Plan view of another embodiment of the heat generating pack of the present invention Sectional view of XX Schematic showing panties and fever pack with crotch and full face panel Sectional drawing which shows the heat generating pack folded in half and enclosed in the outer bag The top view of the filter paper for easy water value measurement of the present invention The perspective view for demonstrating the easy water value measurement of this invention Sectional drawing for demonstrating the easy water value measurement of this invention Sectional drawing for demonstrating the easy water value measurement of this invention The top view of the filter paper after implementation of the mobile water value measurement of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exothermic pack 2 Exothermic composition molded object 3 Division | segmentation heating part 4 Division | segmentation part 5 Oxygen permeation | transmission means 6 Base material 7 Nonwoven fabric 8 1st contact bonding layer 9 2nd contact bonding layer 10 1st outer packaging material 11 2nd outer packaging Material 12 Mounting means 12A Adhesive layer 13 Separator 14 Upper end 15 Lower end 16 First surface 17 Second surface 18 Panty 19 Crotch 20 Front panel 21 Outer bag (oxygen-impermeable storage bag)
22 Push-in plate 23 Flat plate 24 Non-water-absorbent film (polyethylene film, etc.)
25 Filter paper with 8 lines radially spaced from the center point at 45 degree intervals 26 Template with hollow cylindrical holes 27 Hole 28 Sample 29 Stainless steel plate 30 Distance to the water or solution leaching tip 31 On the filter paper Hollow cylindrical hole equivalent position 32 Filter paper for measuring the penetration distance of water or solution

Claims (15)

A heat-generating composition molded body obtained by molding a moldable heat-generating composition that generates heat upon contact with oxygen in the air is laminated on a substantially planar base material, and further covered with a covering material. A heat generating pack having a heat generating peripheral part and a divided heat generating part constituted by the exothermic composition molded body and a divided part constituted by the heat sealing,
1) The base material and the covering material are composed of a heat-sealable thermoplastic resin film,
2) The substrate has no pockets, storage compartments or storage areas,
3) The base material and / or the covering material is previously provided with breathable means by perforation,
4) A plurality of the divided heat generating portions are provided via the divided portions,
5) The moldable exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, has an easy water value of 0.01 to 20, and has a coagulant aid, a coagulant, and an agglomerate. Does not contain adjuvants, dry binders, dry binders, dry binders, adhesive materials, thickeners and excipients,
6) The heat generating pack characterized in that the bending resistance in the longitudinal direction of the heating pack is 100 mm or less and the bending resistance ratio in the short direction of the direction is 50 or more.   The heating pack according to claim 1, wherein the bending resistance of the base material and the covering material is 200 mm or less.   The thermoplastic resin of the heat-sealable thermoplastic resin film is polyethylene, polypropylene, nylon, polyester, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, saponified ethylene vinyl acetate copolymer, ethylene vinyl acetate copolymer. The heat-generating pack according to claim 1 or 2, wherein the heat-generating pack is at least one selected from the group consisting of a mixture of these and a laminate thereof.   The heat-sealable thermoplastic resin film has a first side composed of a thermoplastic resin and a second side composed of a saponified ethylene-vinyl acetate copolymer and a second side composed of an ethylene-vinyl acetate copolymer. The heat generating pack according to any one of claims 1 to 3, wherein the heat generating pack is a laminate.   The laminate is a coextruded laminate of a polypropylene material and an ethylene vinyl acetate copolymer material, and the polypropylene is 10% to 90% of the total thickness of the laminate. The heat generating pack according to any one of claims 1 to 4.   The heat generating pack according to claim 5, wherein the polypropylene is 40% to 60% of the total thickness of the laminate.   The heat generating section has a plurality of section heat generating sections provided via a section section, and at least one of the four adjacent section heat generating sections whose center points form a quadrilateral is the other three section heat generating sections. Each section heat generating section is related to each other so as to block at least one end of at least one of the lines passing through the center line of the minimum width of the section existing between the sections and orthogonal to the center line. The width of at least one section between the four adjacent heat generating portions is sufficiently close to each other, and the width is 37.5% or less of the minimum diameter of the four adjacent heat generating portions. The heat generating pack according to any one of 1 to 6.   The heat generating section has a plurality of section heat generating sections provided via a section section, and at least one of the three adjacent section heat generating sections whose center points form a triangle is between the other two section heat generating sections. Passing through the center line of the minimum width of the partitioning portion existing at the end, and cutting off one end portion of the straight line orthogonal to the centerline, the maximum width of the partitioning portion existing between the three adjacent heating sections. The heat generation pack according to any one of claims 1 to 6, wherein the small width is 15% or less of a measured value of the minimum diameter of the section heat generation portion constituting the triangle.   The moldable exothermic composition is a water retention agent, a water absorbing polymer, a pH adjuster, a hydrogen generation inhibitor, an aggregate, a fibrous material, a functional substance, a surfactant, an organosilicon compound, a pyroelectric substance, a humectant, Containing at least one selected from fertilizer components, hydrophobic polymer compounds, exothermic aids, metals other than iron, metal oxides other than iron oxide, acidic substances, or mixtures thereof. The heat generating pack according to any one of claims 1 to 8, characterized in that   The moldable exothermic composition comprises 30 to 80% by weight iron powder, 3 to 25% by weight carbon material, 0.5 to 10% by weight reaction accelerator, and by weight. The heat generating pack according to claim 1, comprising 1% to 40% of water.   When the exothermic composition molded body is encapsulated in the section heat generating portion, the ratio of the section heat generating section volume to the volume of the heat generating composition molded body is set to 0.7 to 1.0. The heat generating pack according to any one of claims 1 to 10. The heat generating pack according to any one of claims 1 to 11, wherein the heat generating composition molded body is compressed and has a density greater than 0.85 g / cm ³ .   The first outer packaging material is provided on the covering material side of the heat generating pack according to any one of claims 1 to 12, the second outer packaging material is provided on the base material side, and the first surface and the second surface are uneven. The heat generating pack has a means made of an adhesive layer as a fixing means, and the means is located on a first surface made of the first outer packaging material, and the first surface has oxygen infiltration means. A heating pack characterized by having a bending resistance in the longitudinal direction of 100 mm or less and a bending resistance ratio in the width direction perpendicular to the longitudinal direction of 50 or more.   14. A method of use for holding the heat generating pack according to claim 1 between clothes and skin, wherein the heat generating pack is attached to the clothes through an adhesive layer provided on the ventilation surface of the heat generating pack. A method for using a heat-generating pack, characterized in that the skin temperature is maintained at 32 ° C. to 50 ° C. for a period of 20 seconds to 24 hours, with the other surface being brought into contact with the skin.   The method of using a heat generating pack according to claim 14, wherein the temperature is maintained at 32 ° C to 39 ° C in the method of use.

Images