JP2007275083A - Exothermic wrap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exothermic wrap which easily and surely fits on a bendable section such as the elbow or the knee, can be heated, can be applied to each section of a human body, e.g., a bending section of the shoulder, the arm, the neck or the foot and so forth with a good following deformability, and is hard to generate a feeling of incongruity. <P>SOLUTION: This exothermic wrap 1 has an exothermic section 4 which is constituted of an exothermic composition molded body being molded with a moldable exothermic composition which heats by coming into contact with oxygen in the air, and a division section 5 which is constituted of a heat-seal. The moldable exothermic composition contains an iron powder, a carbon component, a reaction accelerator and water as requisite components. The easy hydraulic value is 0.01 to 20. The exothermic wrap contains no coagulant assisting agent, a coagulant, a conglomerate assisting agent, a drying binder, a drying linking agent, a drying linking material, an adhesive material, a thickening agent, and an excipient. A wrapping material which constitutes a basic material and a covering material is constituted of a heat-sealable thermoplastic resin film, and on which an oxygen permeating means is provided in advance by perforating. A plurality of the exothermic sections are provided with an interval through the division section. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat generating wrap that generates heat continuously, has excellent flexibility, can be easily and reliably fitted to a bendable part such as an elbow or a knee, and can be deformed by following.

  A common method of treating acute, frequent and / or chronic pain is to apply heat locally to the affected area. Such heat treatment is used as a means of treating symptoms including dull and stiff muscles and joints, neuralgia, rheumatism and the like. In general, the method of using pain therapy to abate pain has been to apply locally a relatively high temperature, ie, heat above about 40 ° C., for a short period of time. These treatments include the use of vortex baths, steamed towels, hydrocollators, hot water bottles, hot packs, heated wraps and elastic compression bands. Many of these devices use reusable heat-generating wraps, such as gels that can be heated in water and / or microwave ovens, or current. In general, most of these devices are inconvenient for regular and long-term use. The thermal energy cannot be obtained immediately when needed and / or can be released controllably and / or maintained at a stable temperature for an extended period of time. In general, these types of devices limit user movement and are unable to maintain proper positioning of the thermal energy during use.

  Moreover, the exothermic composition using the oxidation reaction of metals, such as iron, has been provided as a powder or a granular form, a viscous body, or a cream body. Heat generation wraps using them are very excellent in view of cost, safety, heat generation temperature, etc., and have already been put into practical use, for example, as so-called chemical warmers filled in breathable bags.

In order to obtain a more comfortable feeling of use, in order to prevent the heat-generating composition from becoming uneven and to fit it with various shapes, a thickener, binder, etc. are used to maintain the shape maintainability and heat generation characteristics. Various compositions have been proposed.
For example, Patent Document 1 discloses a method for producing a heat-generating composition granulated to have an average particle size 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 2 proposes a disposable body warmer made of a heat-generating composition that has been added to a powdery thickener such as corn starch or potato starch and waited for shape maintenance.
Patent Document 3 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 4 proposes a heat-generating wrap that uses a cross-linking agent and a water-absorbing polymer for convenience, and is pressure-integrated by pressure.
Patent Document 5 proposes an ink-like or cream-like exothermic composition, an exothermic wrap, and a method for producing the same, using a thickener for convenience.
Patent Document 6 proposes a product that maintains the shape by covering the surface of a heat-generating composition molded body using a binder with a breathable film such as CMC.
Further, in Patent Document 7 and Patent Document 8, the exothermic composition is changed to a sticky body or a 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 warmed. Has been proposed.
Further, there is disclosed a heat generating wrap having a flexible structure, in which a heat generating portion in which a heat generating composition is sealed between packaging materials having at least one air permeability is composed of a plurality of small heat generating portions partitioned by a seal portion.
Further, Patent Document 9 and Patent Document 10 disclose a heat generating wrap composed of a heat generating portion that is filled with a powdered heat generating composition and divided into a plurality of sections by a seal portion.
Patent Document 11, Patent Document 12, Patent Document 13, Patent Document 14, Patent Document 15 and Patent Document 16 use a heat generating composition using a flocculant or a dry binder and a substrate having a storage pocket. Thus, a heat generating wrap in which the heat generating composition heat generating portion is divided into a plurality of sections has been proposed.
Based on the above, a long-awaited exothermic wrap will reach operating temperature relatively quickly, maintain a controlled sustained temperature, be flexible in at least one direction, and stiff in a direction perpendicular to it. It is suitable for various body types, and is detachably attached to the user's body so that stable and convenient heating can be performed on the user's body or body part.

  However, with the expansion of the use of disposable body warmers intended to be applied to various parts of the human body such as the shoulders, arms, neck and legs, the exothermic composition may be hardened with a thickener, etc. There is a problem that it is difficult to hold and easily falls off, and a strong sense of discomfort occurs. Such a problem is further promoted by a decrease in flexibility due to agglomeration as the reaction of the exothermic lap progresses. 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.

  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 wraps have been 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 agglomerates and compression bodies are 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 using a powdery exothermic composition or a granular exothermic composition as the exothermic composition and producing a heat generating wrap having a segmented exothermic part, the method using the filling method is a powdery exothermic composition or a granular exothermic composition. 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 wrap 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 part, 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 17, a complicated operation must be performed and the structure is also complicated. Therefore, the operation when forming the heat generation layer is troublesome, the apparatus to be used is complicated and expensive, it is easy to break down, requires troublesome maintenance, is inconvenient to handle, and further reduces the size of the heat generation part. 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 wrap 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 wrap has a narrow region where the minimum 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, which causes practical problems. In order to increase the heat generation duration, it is necessary to increase the size of one sectioned heat generating portion, and there is a problem that a heat generating wrap having a large section heat generating portion is formed. 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.

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

  Therefore, the present invention can be directly fixed to the skin, is thin and flexible, and even when the exothermic composition with aeration and heat generation proceeds to react and the exothermic composition becomes agglomerated and the flexibility is reduced, the shrinkage curl due to heat generation Even if a part of the storage bag rolls up, it keeps the adhesive holding state well and does not easily fall off, it has excellent flexibility, fits easily in a flexible part such as the elbow or knee, and heats it It is possible to provide a heat generating wrap that can be applied to various parts of a human body such as a shoulder, an arm, a curved portion such as a neck and a leg with good followability and hardly cause a sense of incongruity.

The exothermic wrap of the present invention comprises, as described in claim 1, a laminate of a exothermic composition molded body obtained by molding a moldable exothermic composition that generates heat upon contact with oxygen in the air, and is further coated. Covering the material, heat-sealing the peripheral portion of the heat-generating composition molded body, and a heat-generating wrap having a heat-generating section formed by the heat-generating composition molded body and a section formed by the heat-sealing,
1) A first outer packaging material and a second outer packaging material are provided on the heating wrap,
2) 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,
3) The packaging material constituting the base material and the covering material is composed of a heat-sealable thermoplastic resin film,
4) The substrate is substantially planar and has no pockets, storage compartments or storage areas;
5) The base material and / or the covering material is previously provided with oxygen permeation means by perforation,
6) A plurality of the heat generating parts are provided at intervals through the dividing part,
7) The bending resistance in the longitudinal direction of the heat generating wrap is 100 mm or less, and the bending resistance ratio in the lateral direction perpendicular to the heating wrap is 30 or more,
8) A fixing means for detachably attaching the heat generating wrap to the user's body is provided on a part of the exposed portion of the heat generating wrap.
Moreover, the heat-generating wrap according to claim 2 is the heat-generating wrap according to claim 1, wherein the bending resistance of the base material and the covering material is 200 mm or less.
Further, the heat generating wrap according to claim 3 is the heat generating wrap according to claim 1 or 2, wherein the volume of the divided heat generating portion is 0.1 to ³⁰ cm ³ and the maximum width is 1 to 50 mm. Features.
Further, the heat generating wrap according to claim 4 is the heat generating wrap according to any one of claims 1 to 3, wherein the fixing means of the heat generating wrap is at or near an end of the heat generating wrap in the major axis direction. It is located.
The heat generating wrap according to claim 5 is the heat generating wrap according to any one of claims 1 to 4, wherein an adhesive layer is provided as the fixing means on the non-venting surface of the heat generating wrap, and the non-venting surface is provided. A part of the opposite surface is oxygen permeable.
Moreover, the heat generating wrap according to claim 6 is the heat generating wrap according to any one of claims 1 to 5, wherein the heat generating portion includes a plurality of divided heat generating portions provided via the dividing portions, 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.
In addition, the heat generating wrap according to claim 7 is the heat generating wrap according to any one of claims 1 to 5, wherein the heat generating portion has a plurality of divided heat generating portions provided via a dividing portion, 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.
Moreover, the heat-generating wrap according to claim 8 is the heat-generating wrap according to any one of claims 1 to 6, wherein the heat-generating wrap includes a plurality of pieces provided on a long base material via a section. In five adjacent segmented heat generating units that have segmented heat generating units and are located at both long ends and whose center point forms a pentagonal pattern, the segmented heat generating unit at the extreme end is between the other four segmented heat generating units. One end of at least two of the tangents of the two segment heat generating parts that are in the existing section and are directed to the long end is cut off.
Moreover, the heat-generating wrap according to claim 9 is the heat-generating wrap according to any one of claims 1 to 8, characterized in that the covering material has a concave portion that matches the shape of the section heat-generating portion. .
The exothermic wrap according to claim 10 is the exothermic wrap according to any one of claims 1 to 9, wherein the exothermic composition molded body is compressed and has a density greater than 1 g / cm ^3. It is characterized by that.
An exothermic wrap according to claim 11 is a reaction in which the exothermic composition according to any one of claims 1 to 10 includes iron powder, a carbon component, a reaction accelerator and water as essential components. It is characterized in that the mixture is contact-treated with an oxidizing gas and the moisture is adjusted.
Moreover, the heat-generating wrap according to claim 12 is the heat-generating wrap according to any one of claims 1 to 11, wherein the iron powder is at least partially covered with an iron oxide film, 20 to 100% by weight of active iron powder having a thickness of 3 nm or more and having an iron component region not containing oxygen in at least one region selected from at least the central region and the region under the iron oxide film It is characterized by doing.
Moreover, the heat generating wrap according to claim 13 is the heat generating wrap according to any one of claims 1 to 11, wherein the iron powder is at least partly covered with a wustite film, and has an X-ray intensity with iron. The ratio is characterized by containing 20 to 100% of active iron powder having a wustite amount of 2 to 50% by weight.
Further, the exothermic wrap according to claim 14 is the exothermic wrap according to any one of claims 1 to 13, wherein the moldable exothermic 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.
In addition, the heat generating wrap according to claim 15 is characterized in that in the heat generating wrap according to any one of claims 1 to 14, the heat generating composition molded body is compressed in the heat generating wrap.
Moreover, the heat-generating wrap according to claim 16 is the heat-generating wrap according to any one of claims 1 to 15, wherein the heat-sealed portion is heat-sealed after temporary attachment with an adhesive layer, The pressure-sensitive adhesive component constituting the pressure-sensitive adhesive layer and the heat-sealing agent component constituting the heat-seal layer coexist.
Moreover, the heat-generating wrap according to claim 17 is the heat-generating wrap according to claim 16, wherein after the heat sealing, a part of the heat-generating composition molded body is moved to a temporary attachment portion that is not heat-sealed. The temporary attachment part which is not heat-sealed is opened.

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 previously provided with a storage portion intended to store a heat generating composition such as a pocket. The cost of heat-generating wraps was reduced.
2) The uneven heat-generating wrap using the heat-generating wrap of the present invention has a heat-generating part composed of a plurality of divided heat-generating parts through the dividing part, so that it has flexibility and structure maintenance and is used along the body well. Stable heat generation characteristics can be maintained regardless of changes in body posture.
3) Since the exothermic wrap of the present invention has good adhesion to the skin, when a drug-containing pressure-sensitive adhesive layer is used, the drug is absorbed into blood or the like whose circulation has been activated by the thermal effect, and further Since the drug can be effectively circulated to each part in the living body, the local therapeutic effect is further improved, the systemic therapeutic effect is further improved, and the pharmacological effect is further enhanced.
4) The exothermic wrap of the present invention has water permeability when a hydrophilic pressure sensitive adhesive is used for the pressure sensitive adhesive layer, and when a water absorbing layer is interposed between the support and the pressure sensitive adhesive layer, sweating action, etc. As a result, body fluid such as sweat exuded from the skin permeates the adhesive layer, and the permeated body fluid is absorbed by the carrier.
5) Since the heat generating wrap of the present invention has a heat generating part on one side, it can not only simply supply warm heat to the human body in winter, but also has symptoms such as local stiffness, pain and coldness. When used for diseases such as stiff shoulders, muscle pain, muscle stiffness, low back pain, menstrual pain, cold hands and feet, neuralgia, rheumatism, bruise, sprains, etc., the therapeutic effect due to heat is expressed.

The present invention relates to a heating composition molded body obtained by molding a moldable heating composition that generates heat upon contact with oxygen in the air, laminated on a substrate, and further covered with a covering material, and the periphery of the heating composition molded body A heat-generating wrap having a heat-generating part having a heat-generating part formed by the heat-generating composition molded body and a section formed by the heat-sealing,
1) A first outer packaging material and a second outer packaging material are provided on the heating wrap,
2) 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,
3) The packaging material constituting the base material and the covering material is composed of a heat-sealable thermoplastic resin film,
4) The substrate is substantially planar and has no pockets, storage compartments or storage areas;
5) The base material and / or the covering material is previously provided with oxygen permeation means by perforation,
6) A plurality of the heat generating parts are provided at intervals through the dividing part,
7) The bending resistance in the longitudinal direction of the heat generating wrap is 100 mm or less, and the bending resistance ratio in the lateral direction perpendicular to the heating wrap is 30 or more,
8) A heating wrap provided with a fixing means for removably attaching the heating wrap to the user's body on a part of the exposed portion of the heating wrap.

  The 90 ° peel strength of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is preferably about 300 g / 25 mm to about 1000 g / 25 mm, more preferably about 400 g / 25 mm to about 900 g / 25 mm, and still more preferably about 500 g. / 25 mm to about 800 g / 25 mm.

  In addition, at least 20 to 50 ° C., at least a part of the heat generating wrap has a region in which the bending resistance ratio of one direction and the direction orthogonal thereto is 2 or more on a surface orthogonal to the thickness direction of the heat generating wrap. And it is preferable that the bending resistance ratio in the area | region where the bending resistance of the said area | region is low is 50% or less.

(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 heating parts are sufficiently close to each other, and the width of at least one section between the four adjacent heating sections is 37.5% or less of the minimum diameter of the four adjacent heating sections. Thus, 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. An excellent temperature zone characteristic can be obtained when the minimum width of the portion is 15% or less of the measured value of the minimum diameter of the section heat generating portion constituting the triangle.
That is, by disposing the segment heat generating part for the above (1) and (2), it is easy to heat seal the segment heat generating part,
1) Gently change the temperature zone of the heat generation wrap without adding a large temperature difference, and minimize the rate of change in temperature between the divided heat generations.
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, a description will be given with reference to the drawings.
1 and 2 show a preferred embodiment of the heat generating wrap of the present invention, the whole is shown in FIG. 1, and a cross-sectional view of ZZ is shown in FIG.
As shown in FIGS. 1 and 2, the preferred embodiment of the present invention has a generally rectangular lantern shape.
In this heat generating wrap 1, a plurality of section heat generating portions 4 are formed by covering a heat generating composition molded body laminated on a planar substrate 6 with a covering material 7 and sealing the outer peripheral portion. Fixing means 12, 12 are provided on the surface side that is located on the body side when the first end 16 and the second end 17, which are the ends in the long axis direction of the heat generating wrap 1, are attached. The fixing means 12 is preferably located at or near the first end 16 and / or the second end 17. The second side portion 15 located at a position away from the body side at the time of wearing is formed so as to have oxygen permeability, so that oxygen can be introduced into the exothermic composition molded body 2.

  FIG. 3 shows another embodiment. When the heat-generating wrap 1 is narrowed at the first edge 18 and the second edge 19 substantially in the middle between the first end 16 and the second end 17, when being applied to the user's body and / or Or, when the user is wearing, the heating wrap 1 is more likely to bend and adapt to different areas of the user's body and / or body part. This special shape further allows the user to interfere with the bending ability of each limb in the limb that bends and stretches the wrap and / or the buckling and wrapping of the lap as the user's limb moves normally. To be able to hit without causing folding. FIG. 4 is a cross-sectional view of the heat generating wrap taken along the line Y-Y. A double-sided adhesive tape is used as the fixing means 12.

The heat generating wrap 1 has a structure that is difficult to bend in the short side direction perpendicular to the longitudinal direction and is easily bent in the longitudinal direction. The heat generating wrap includes a plurality of individual section heat generating portions 4 fixed to the integral structure. These divided heat generating portions 4 are arranged apart from each other, and each divided heat generating portion 4 functions independently from the remaining divided heat generating portions 4. Each section heat generating section 4 is preferably provided with a heat generating composition molded body packed in a high density state. This heat generating composition formed body almost fills the usable section heat generating section volume in the section heat generating section 4 and is redundant. By reducing the amount of voids, the movement is limited in the section heating part 4 of the exothermic composition molded body. Further, the exothermic composition molded body may be compressed to an appropriate hardness. Since the exothermic composition molded body is present in the section heat generating portion 4 at a high density, the section heat generating portion does not bend easily. Thus, with the section 5 and the materials selected for the substrate 6 and the covering material 7, the heat generating wrap 1 can be more easily adapted to the user's body than a single large heat generating wrap. .
Moreover, as shown in FIG. 5, the part which is easy to bend in a longitudinal direction is good also as a center part only by changing the shape and position of the division | segmentation heat generating part 4, for example.

  Here, the base material and the covering material in the present invention are not distinguished by the material composition, but the material on which the exothermic composition molded body is laminated is defined as the base material, and then covered with the base material or the exothermic composition molded body. Defined material is defined as a covering material. The base material and the covering material are made of a packaging material whose essential constituent is a heat-sealable thermoplastic resin film. Usually, the base material is non-breathable and the covering material is breathable. However, the base material is breathable, the covering material may be non-breathable, and both may be breathable.

  The heat-generating wrap of the present invention easily adapts to a wide variety of body shapes, provides stable, convenient and comfortable heating and adapts well to the body shape, while preventing the wraps from folding and bunching during use In addition, it has sufficient rigidity to prevent it from coming into contact with the contents of the section heating part easily.

  The base material and the covering material are made of a flexible thermoplastic resin material. Moreover, the packaging material conventionally used can be used for the disposable body warmer which uses iron powder, and uses the heat-generating composition which generate | occur | produces heat in contact with oxygen in air, or a heat-generating wrap. 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 between them. 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. The heating wrap composed of the section heating section and the section section has a section functioning as a hinge from room temperature to warming (about 20 ° C. to about 60 ° C.) and bends more preferentially than the section heating section. The good bending resistance difference is still maintained during heating. As a result, the exothermic wrap maintains sufficient structural support for the segmented exothermic part and has sufficient rigidity to 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 wrap is 100 mm or less, preferably 60 mm or less, more preferably 50 mm or less, and further preferably 20 mm or less. Further, the bending resistance ratio in the direction orthogonal to the longitudinal direction is 30 or more, preferably 40 or more, and more preferably 50 or more. This flexural modulus is maintained at least between 20 and 60 ° C.

  The base material and / or the covering material has a bending resistance of 200 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 and 60 ° C. The bending resistance of the base material and the covering material can be adjusted by the type, thickness, and degree of stretching.

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. Materials that are usually used for chemical warmers and heat-generating wraps 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 wrap of the present invention, the surface in 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, carbon component, reaction accelerator and water as essential components, and contains a coagulant aid, dry binder, coagulant, adhesive binder, thickener and excipient. Without having surplus water with an easy water value of 0.01 to 20, having moldability with the surplus water, and moisture in the heat generating composition does not function as a barrier layer, and is in contact with air Any exothermic composition that causes an exothermic 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 0.01 or less.

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 be conductive 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. Active iron powder is an iron oxide film that is at least locally formed on the surface of the iron powder, and is oxidized by pits inside and outside the local battery or between the iron oxide film and the iron oxide film. 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 or the like 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, and the binding and structuring between the components due to the intermediation of water occurs. 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, a water-containing pit containing iron ions, chlorine ions, etc. is formed, It is presumed that a functional change occurs, iron powder is activated, and heat generation 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, which 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 produced by various molding methods such as through-molding and casting. 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 exothermic test of the exothermic wrap shall follow the JIS temperature characteristic test.

At least a 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, at least a part of a portion other than the metal other than iron may be 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 will have hydrophilic property and oxidation catalyst property (FeO etc.) in its part. Having an oxygen-containing film on its part, not mixing, is important for producing a heat generating 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 heat buildup 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, as the X-ray intensity ratio with iron. Preferably it is 2 to 30 weight%, More preferably, it is 6 to 30 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, Sponge iron powder is mentioned as an example, and particularly when the conductive carbonaceous material is activated carbon and the iron powder is reduced iron powder, it is useful for the exothermic wrap.
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 wrap, the thickness of the iron oxide film of the iron powder in the exothermic composition in the mixture or exothermic wrap, and the amount of wustite, measure the exothermic composition and mixture. According to the measurement. That is,
1) Easy water value The exothermic composition is taken out from the heat generating wrap, 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, this can be used to produce a heat generating wrap that warms up immediately during use.
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 is accurately obtained. And a heat generating wrap with no seal breakage can be manufactured. Thereby, various shapes of exothermic composition molded bodies can be produced, and various shapes of exothermic wraps can be formed.

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 one 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 a wustite content of 2 to 50% by weight in an X-ray peak intensity ratio with iron.
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 there is no expansion of the outer bag at the time of storage or the like, and a heat generation wrap having excellent heat generation characteristics with good heat generation is 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, the heat-generating wrap that contains the heat-generating composition in the storage bag provided on the market is provided on the assumption that it can be stored in the outer bag, which is a non-breathable storage bag, so that 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 sieve is combined in the order of 8, 12, 20, 32, 42, 60, 80, 100, 115, 150, 200, 250, and 280 meshes and the receiving 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. 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.
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 (60 mm long x 40 mm wide at the center with a punched hole processed into R5 thickness 2 mm x height 200 mm x above the endless belt that can run 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. Further, 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 produce a heat generating wrap 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 3 mm × length 600 mm × 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 by using a data collector, measuring the temperature for 2 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.

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.
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 part storage area is filled with the heat generating composition molded body, the volume of the heat generating composition molded body which is the heat generating composition molded body occupied area 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, the shape of the exothermic composition molded body or the divided heat generating portion may be any shape, but examples thereof include a planar shape such as a circle, an ellipse, a polygonal shape, a star shape, and a flower shape. 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 heating part means the internal volume of the division | segmentation heating part which accommodated the heat-generating composition molded object.

  There is a first outer wrapping material on the first surface of the heating wrap, which is attached to the substrate by a first adhesive layer. There is a second outer wrapping 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 pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are made of the same material.

  The heat-generating wrap of the present invention is simple, prevents creases or bulges from occurring during use, easily adapts to a wide range of body contours, and continuously provides comfortable warmth.

  Further, the heat generating wrap has a heat generating portion that includes a heat generating composition formed body that generates heat upon contact with oxygen in the air and that includes a plurality of individual section heat generating sections and a section that does not include the formed body. Since the divided heat generating portion is inflexible and the divided portion is flexible, the divided portion acts as a hinge between the divided heat generating portions and bends with priority over the divided heat generating portion. Accordingly, the heat generating wrap has flexibility and directionality, and can provide excellent adaptability to the user's body and effective and effective heating.

  By appropriately selecting the shape and arrangement of the base heating element, the base material, the covering material, the heating composition molded body or its compression body, and the shape and arrangement of the section heating section, which compose the heating section, and combining the section heating section and the section, the heating wrap In addition, desired directionality and intermittentness can be given to the flexibility of the heat generating wrap. That is, if it is flexible in all directions, the heat generating wrap having fixing means by the adhesive layer is rounded when fixed to the body, and the heat generating wrap itself is fixed by the adhesive layer, which makes handling difficult. By providing non-flexibility in one direction and flexibility in the other direction, the heat generating wrap can be accurately fixed to the body, and the heat generating wrap can be kept flexible during use and has excellent handling and use feeling.

A fever wrap can be applied to the body to treat acute, repetitive and / or chronic pain, including painful human skeleton, muscles and / or the aforementioned pain.
The application temperature is preferably maintained from about 32 ° C. to about 50 ° C. for a period of about 20 seconds to about 24 hours. More preferably, the skin temperature is from 36 ° C. to about 42 ° C. for a period of 1 hour to about 8 hours.

  All percentages and ratios used herein are by weight of the total composition unless otherwise specified, and all measurements were made at 20 ° C.

  The first outer cloth is not limited as long as it is soft and flexible and does not irritate the skin, but as a material suitable for the first outer cloth, a molded film, a woven cloth, a knitted cloth, And a nonwoven fabric etc. are mentioned as an example. Examples of the nonwoven fabric include card nonwoven fabric, spunbond nonwoven fabric, air-twisted nonwoven fabric, heat-bonded nonwoven fabric, water-twisted nonwoven fabric, melt-swelled nonwoven fabric, and / or air-penetrating bonded nonwoven fabric. The material composition of the first outer fabric is cotton, polyester, polyethylene, polypropylene, nylon or the like. Laminates of these and similar materials are also useful.

  The second outer fabric is a soft and flexible material. Examples of materials suitable for the second outer fabric include a molded film, a woven fabric, a knitted fabric, and a non-woven fabric. Examples of the nonwoven fabric include card nonwoven fabric, spunbond nonwoven fabric, air-twisted nonwoven fabric, heat-bonded nonwoven fabric, water-twisted nonwoven fabric, melt-swelled nonwoven fabric, and / or air-penetrating bonded nonwoven fabric. The material which comprises the said base material and coating | covering material can be used for the molded film on both outer sides.

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. 6 thru | or FIG. As shown in FIG. 6, NO. In which eight lines are written at intervals of 45 degrees radially from the center point. 2 (JIS P 3801 type 2) filter paper 24 is placed on a stainless steel plate 28 as shown in FIGS. 7 and 8, and a hollow cylindrical hole 26 having an inner diameter of 20 mm and a height of 8 mm is formed at the center of the filter paper 24. A sample plate 25 having a length of 150 mm and a width of 100 mm is placed, a sample 27 is placed in the vicinity of the hollow cylindrical hole 26, the push plate 21 is moved along the mold plate 25, and the sample 27 is pushed in to form a hollow cylinder The sample is scraped along the surface of the mold plate 25 (mold press molding). Next, a non-water-absorbing 70 μm polyethylene film 23 is placed so as to cover the hole 26, and a stainless steel flat plate 22 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. 9). Thereafter, the filter paper 24 is taken out (FIG. 10), and the soaking locus of water or aqueous solution is set as a distance 29 from the circumferential portion 30 which is the edge of the hole of the hollow cylinder to the soaking tip along the radial line. Read in mm. Similarly, the distance 29 is read from each line, and a total of 8 values are obtained. 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. Also, when measuring the mobile water value of the exothermic composition in the exothermic wrap, 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 a surplus water amount of 0.01 to 20 is laminated on a substrate, covered with a covering material, and at least the periphery of the exothermic composition molded body. A heat generating wrap 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 wrap using the exothermic composition molded body obtained by molding a moldable exothermic composition using the surplus water of the present invention as a linking substance, the exothermic composition is an aggregating aid, a dry binder, an aggregating agent, 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 a seal part, the heat generating wrap itself has flexibility, so that it can be applied to places where flexibility is required, such as various parts of the human body or curved objects. It is possible to provide a heat generating wrap 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 the pressure-sensitive adhesive layer, and then the peripheral portion and the exothermic portion of the exothermic composition molded body. By heat-sealing the periphery of the wrap, the reliability of heat-sealing is improved, so that it is possible to increase the production speed of the heat-generating wrap and reduce the width of the heat seal.

The mobile water value (0 to 100) in the present invention is preferably 0.01 to 20, more preferably 0.01 to 18, still more preferably 0.01 to 15, and still more preferably. It is 0.01-13, More preferably, it is 1-13, More preferably, it is 3-13.
Moreover, the exothermic composition having an easy water value of less than 0.01 has insufficient moldability. When it exceeds 20, it is necessary to remove a part of moisture of the exothermic composition by water absorption or dehydration. In other words, a practical exothermic reaction will not occur unless a part of moisture in the exothermic composition molded body is removed by water absorption or dehydration using a water absorbent packaging material or the like. An exothermic composition having an easy water value of more than 50 has too much excess water, becomes a slurry, has no moldability, and the excess water becomes a barrier layer, and as it is, it contacts with air and does not cause an exothermic reaction.
In addition, a water-absorbing polymer having a slow water absorption rate is used, and a high mobile water value is exhibited at the time of molding. In the exothermic state, the exothermic composition having a high mobile water value is treated as an exothermic composition in which excess water does not form a barrier layer.
Moreover, since the exothermic composition with an easy water value of 0.01 to 50 has moldability, it is a moldable exothermic composition.

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 produce a heat generating wrap by a molding method.

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.

  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 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.

In the present invention, the bending resistance indicates rigidity (harness, stiffness) or flexibility, and is the same as in the JLS-L-1096A method (45 ° cantilever method) except that the exothermic wrap itself is used as a sample. That is what I followed. That is, one side of the heat generating wrap is placed on the scale base line on a smooth horizontal table having a 45-degree slope at one end. Next, the heat generating wrap 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 wrap contacts 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 wrap has moved. Each of the five heat generating wraps 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, in the measurement, when measuring the pressure-sensitive adhesive side surface of the heat generating wrap with the pressure-sensitive adhesive layer so as to be 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 wrap remains on the horizontal table with a width of 5 mm or more and a length of 20 mm or more. 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 wrap with an adhesive layer, as a separator for the adhesive layer, a plastic film with a bending resistance of 30 mm or less, or a plastic that has a thickness of 50 μm or less, preferably 25 μm or less, and has no waist or can be wrinkled lightly Use a soft film with no waist, such as a film, along with 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.

The bending resistance ratio of the heating wrap or the heating portion in the present invention is the bending resistance ratio with respect to the entire length of the heating wrap or the heating portion in one direction, and is calculated by the following equation.
Flexural modulus = (A / B) × 100
A: Bending softness of heat generating wrap or heat generating part in one direction B: Total length of heat generating wrap 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.

  The bending resistance ratio in the present invention is a ratio of the bending resistance in one direction to the bending resistance in a direction perpendicular to the thickness direction of the heating wrap or the heating portion to a small bending resistance. The bending resistance ratio is preferably 2 or more.

In the case of the heat generating wrap having the segmented heat generating portions provided in the form of streaks in the present invention, the parallel hexahedron-shaped segmented heat generating portion that maximizes the absolute value of the difference in the bending resistance in the two directions perpendicular to each other. A heat generation wrap with streaks spaced apart, a heat generation wrap with a further adhesive layer, and a heat generation wrap with the adhesive layers spaced 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 wrap 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, such as when a heat-generating wrap 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. Therefore, since the heat generating wrap of the present invention can form a two-dimensional curved surface, one direction is almost linear and the other two directions can form a curved surface. Ideal for symptom relief and treatment.
Further, the heat generating wrap of the present invention is flexible, and a heat generating portion showing a uniform temperature distribution and a heat generating portion showing a pattern temperature distribution can be obtained by adjusting the size and interval of the convex section heat generating portions. The pot effect of the heating part can be improved by the pattern temperature distribution.
In the heat generating wrap having the section 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.

  The heat-generating wrap of the present invention can be obtained in various shapes, thicknesses, and temperature zones, so that it is not for normal body warming, for joints, for facial use, for eyes, for slimming, for drip solution heating / warming, heating For poultice, drug body warmers, neck, waist, mask, gloves, heels, or for alleviating symptoms such as shoulder pain, muscle pain, menstrual pain, cushions, and warming / warming human body during surgery It can be used for various uses such as for thermal sheets, for transpiration fragrance, for abdomen, for transpiration insecticide, for cancer treatment and the like. Furthermore, it can be used for warming / insulating machines and pets.

For example, when used for symptom relief, the fever wrap of the present invention is applied directly to a necessary part of the body or indirectly through a cloth or the like. In addition, when using it for warming / warming the human body during surgery,
1. Apply a fever wrap directly to the body that needs to be warmed or kept warm,
2. Fix the fever wrap to the cover, etc.
3. Fix the fever wrap to a rug laid under the body,
4). Use in advance as a cover or rug as a product with a heating wrap,
An example of such a method is as follows. Examples of muscle and skeletal pain include acute muscle pain, acute skeletal pain, acute related pain, past muscle pain, past skeletal pain, chronic related pain, joint pain such as knee and elbow, and the like.
Although there is no restriction | limiting in the said maintenance time, Preferably it is 20 second-24 hours, More preferably, it is 1 hour-24 hours, More preferably, it is 8 hours-24 hours.
The maintenance temperature is preferably 30 to 50 ° C, more preferably 32 to 50 ° C, still more preferably 32 to 43 ° C, still more preferably 32 to 41 ° C, still more preferably 32 to 39 ° C. It is.

The top view of one embodiment of the exothermic wrap of the present invention Sectional view of ZZ The top view of other embodiment of the exothermic wrap of the present invention Sectional view of YY The top view of other embodiment of the exothermic wrap of the present invention 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 Heat generation wrap 4 Division | segmentation heat generating part 5 Division | segmentation part 6 Base material 7 Coating | covering material 8 1st contact bonding layer 9 2nd contact bonding layer 10 1st outer packaging material 11 2nd outer packaging material 12 Fixing means 13 Separator 14 1st side part 15 1st 2 side part 16 1st edge part 17 2nd edge part 18 1st edge part 19 2nd edge part 20 Longitudinal axis 21 Pushing board 23 Non-water-absorbing film (polyethylene film etc.)
24 Filter paper with 8 lines radially spaced from the center point at 45 degree intervals 25 Template with hollow cylindrical holes 26 Hole 27 Sample 28 Flat plate 29 Distance to the water or solution leaching tip 30 Hollow on the filter paper Cylindrical hole equivalent position

Claims (17)

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 base material, and further covered with a covering material, and the periphery of the heat-generating composition molded body is heat-sealed. And a heat generating wrap having a heat generating part constituted by the exothermic composition molded body and a dividing part constituted by the heat seal,
1) A first outer packaging material and a second outer packaging material are provided on the heating wrap,
2) 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,
3) The packaging material constituting the base material and the covering material is composed of a heat-sealable thermoplastic resin film,
4) The substrate is substantially planar and has no pockets, storage compartments or storage areas;
5) The base material and / or the covering material is previously provided with oxygen permeation means by perforation,
6) A plurality of the heat generating parts are provided at intervals through the dividing part,
7) The bending resistance in the longitudinal direction of the heat generating wrap is 100 mm or less, and the bending resistance ratio in the lateral direction perpendicular to the heating wrap is 30 or more,
8) A heating wrap comprising a fixing means for detachably attaching the heating wrap to the user's body at a part of the exposed portion of the heating wrap.   The heating wrap according to claim 1, wherein the bending resistance of the base material and the covering material is 200 mm or less. The heat generating wrap according to claim 1 or 2, wherein the volume of the divided heat generating portion is 0.1 to ³⁰ cm ³ and the maximum width is 1 to 50 mm.   The heat generating wrap according to any one of claims 1 to 3, wherein the fixing means of the heat generating wrap is located at or near an end of the heat generating wrap in the long axis direction.   The pressure-sensitive adhesive layer is provided as the fixing means on the non-venting surface of the heat generating wrap, and a part of the surface opposite to the non-venting surface is oxygen permeable. Fever wrap.   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 wrap according to any one of 1 to 5.   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 wrap according to any one of claims 1 to 5, wherein a small width is 15% or less of a measured value of a minimum diameter of the section heat generation portion constituting the triangle.   The heat generating wrap has a plurality of divided heat generating portions provided on a long base material via the divided portions, is located at both long ends, and has five adjacent central points forming a pentagonal pattern. In the segmented heat generating part, the segmented heat generating part at the extreme end is in the segmented part existing between the other four segmented heat generating parts, and at least two tangents of the tangents of the two segmented heat generating parts toward the long end part The heat generating wrap according to any one of claims 1 to 6, wherein one end portion is blocked.   The heat generating wrap according to any one of claims 1 to 8, wherein the covering material has a concave portion having a shape matching the shape of the section heat generating portion. The exothermic wrap according to any one of claims 1 to 9, wherein the exothermic composition compact is compressed and has a density greater than 1 g / cm ³ .   2. The exothermic composition is obtained by subjecting a reaction mixture containing iron powder, a carbon component, a reaction accelerator and water as essential components to contact with an oxidizing gas, and further adjusting water content. The heat generating wrap according to any one of 1 to 10.   At least a part of the surface of the iron powder is covered with an iron oxide film, the thickness of the iron oxide film is 3 nm or more, and at least selected from the central region and the region below the iron oxide film The heat-generating wrap according to any one of claims 1 to 11, comprising 20 to 100% by weight of active iron powder having a region of an iron component not containing oxygen in one region.   The iron powder is characterized in that at least a part of the surface is covered with a wustite coating and contains 20 to 100% of active iron powder having an amount of wustite of 2 to 50% by weight as an X-ray intensity ratio with iron. The heat generating wrap according to any one of claims 1 to 11.   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 wrap according to any one of claims 1 to 13,   The heat generating wrap according to any one of claims 1 to 14, wherein the heat generating composition molded body is compressed in the heat generating wrap.   The heat-sealed part is heat-sealed after temporary attachment by the pressure-sensitive adhesive layer, and the heat-sealed part includes the pressure-sensitive adhesive component constituting the pressure-sensitive adhesive layer and the heat-sealing agent component constituting the heat-seal layer. The heat generating wrap according to any one of claims 1 to 15,   After the heat sealing, the temporary heating part that is not heat-sealed is opened by moving a part of the exothermic composition molded body to a temporary fixing part that is not heat-sealed. The fever wrap described.

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