JP2007236725A - Heat-generating structure having microcapsule including aromatic, antipruritic, anti-inflammatory, analgesic, deodorizing, antioxidant, antibacterial, or sterilizing component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-generating structure which holds aromatic, antipruritic, anti-inflammatory, analgesic, deodorizing, antioxidant, antibacterial, or sterilizing components, discharges the components in use, and shows their effects. <P>SOLUTION: The heat-generating structure is obtained by including (1) a fiber layer, an air permeable sheet layer, a heat generating composition layer, an air permeable or non-permeable sheet layer, an adhesive layer, and a release sheet layer, by the above order, (2) the fiber layer, the air-permeable sheet layer, the heat generating composition layer, the air-permeable or non-permeable layer, and the fiber layer, by the above order, or (3) the fiber layer, the air-permeable sheet layer, the heat generating composition layer, the air-permeable or non-permeable sheet layer, the fiber layer, the adhesive layer, and the release sheet layer, by the above order, and allowing the heat generating composition layer to be sealed inside a bag body formed of the air-permeable sheet layer and the air-permeable or non-permeable sheet layer. The fiber layer (at least one layer when the two fiber layers exist) has the microcapsule including the aromatic, antipruritic, anti-inflammatory, analgesic, deodorizing, antioxidant, antibacterial, or sterilizing components. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat generating structure comprising a microcapsule containing a fragrance such as a fragrance or menthol, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component.

  A heat generating structure known as a disposable squirrel is generally a polymer film bag with non-woven fabrics attached to the outside of both front and back surfaces, or a polymer film bag and one of the bags. A non-woven fabric is adhered to the outside of the surface, and an adhesive layer is formed on the outside of the other surface, and a heat generating composition enclosed in the bag body. The heat generating structure generates heat when iron in the heat generating composition is oxidized. This exothermic composition also contains an adsorbent such as activated carbon. The role of the adsorbent is to draw oxygen in the air to the periphery of the iron by an adsorption action in order to cause an oxidation reaction in the iron.

  In recent years, there has been a demand for the use of a scent in a heat generating structure or the use of a heat generating structure together with menthol or the like. However, even if the nonwoven fabric constituting the exothermic structure is impregnated with a fragrance or menthol, it is adsorbed by the adsorbent in the exothermic composition, and thus the above-mentioned demand cannot be met.

  On the other hand, for example, as described in Patent Documents 1 to 3, it has been proposed to attach a microcapsule containing a fragrance or the like to a nonwoven fabric or cloth.

  Further, Patent Document 4 discloses a disposable body warmer provided with a non-slip layer of foamable microcapsules on the outer surface for the purpose of preventing movement of the body warmer from the place where it is mounted.

JP 2004-250804 A JP-A-2005-248410 JP 2006-34421 Japanese Utility Model Publication 02-149218

  An object of the present invention is to provide a heat generating structure that retains fragrance, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal components, which are released during use or in which they have an effect. It is in.

  The present inventor diligently studied to solve the above-mentioned problems and completed the following present invention.

  That is, the first invention comprises a fiber layer, a breathable sheet layer, a heat generating composition layer, a breathable or non-breathable sheet layer, an adhesive layer and a release sheet layer in this order, and the heat generating composition layer is breathable. A heat generating structure enclosed in a bag body formed of a sheet layer and a breathable or non-breathable sheet layer, wherein the fiber layer is aroma, anti-inflammatory, anti-inflammatory, analgesic, deodorant, antioxidant, The present invention relates to a heat generating structure comprising a microcapsule containing an antibacterial or bactericidal component.

  The second invention comprises a fiber layer, a breathable sheet layer, a heat generating composition layer, a breathable or non-breathable sheet layer and a fiber layer in this order, and the heat generating composition layer has a breathable sheet layer and a breathable or A heat generating structure enclosed in a bag formed of a non-breathable sheet layer, wherein at least one of the fiber layers is aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial Alternatively, the present invention relates to a heat generating structure comprising a microcapsule containing a sterilizing component.

  The third invention comprises a fiber layer, a breathable sheet layer, a heat generating composition layer, a breathable or non-breathable sheet layer, a fiber layer, an adhesive layer and a release sheet layer in this order. A heat generating structure enclosed in a bag formed of a breathable sheet layer and a breathable or non-breathable sheet layer, wherein at least one of the fiber layers is aroma, antipruritic, anti-inflammatory, and analgesic In addition, the present invention relates to a heat generating structure comprising a microcapsule containing a deodorant, antioxidant, antibacterial or bactericidal component.

  In the heat generating structure, the fiber layer is preferably composed of one or more selected from the group consisting of nonwoven fabric, woven fabric, knitted fabric, and paper.

  In the heat generating structure, the pressure-sensitive adhesive layer is preferably composed of a pressure-sensitive adhesive composition or a poultice composition.

  In the heat generating structure, the aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component is preferably a volatile substance, for example, a fragrance.

  In addition, as the microcapsules containing the aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component, two or more types of microcapsules containing different components may be used.

  In addition to the above-described components, the heat generating structure may also include other layers such as an adhesive layer for bonding the layers completely or partially.

  For example, in the case of the heat generating structure of the first invention, a breathable or non-breathable sheet layer may be further provided between the breathable or non-breathable sheet layer and the adhesive layer.

  For example, in the case of the heat generating structure of the third invention, a breathable or non-breathable sheet layer may be further provided between the breathable or non-breathable sheet layer and the fiber layer.

  According to the present invention, a scented heat generating structure is provided. By using such a heat generating structure of the present invention, a relaxation effect can be obtained simultaneously with heating.

  In addition, the present invention provides a heat generating structure that is heated while exhibiting preferable actions such as antitussive, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial, or sterilization. By using such a heat generating structure of the present invention, it is possible to enjoy, for example, an anti-inflammatory action or a masticatory action simultaneously with heating.

  Hereinafter, the present invention will be described based on the best mode for carrying out the invention.

  First, the heat generating structure of the first invention will be described with reference to FIG. 1 showing a cross section of an example of the heat generating structure.

  The heat generating structure 100 includes a fiber layer 1, a breathable sheet layer 3, a heat generating composition layer 5, a breathable or non-breathable sheet layer 7, an adhesive layer 9, and a release sheet layer 11 in this order. The fiber layer 1 and the breathable sheet layer 3 are partially bonded or fused so that the breathability is maintained. The breathable sheet layer 3 and the breathable or non-breathable sheet layer 7 form a bag body 15. That is, the outer periphery is bonded or fused. An adhesive layer 9 is formed outside the breathable or non-breathable sheet layer 7. There is a release sheet layer 11 outside the adhesive layer 9. The release sheet layer 11 is peeled off immediately before the heat generating structure is used.

  In the example shown in FIG. 1, the adhesive layer 9 is formed on the entire outer surface of the breathable or non-breathable sheet layer 7, and therefore, a breathable sheet is used as the sheet constituting the layer 7. Even so, the pores of the breathable sheet are blocked by the pressure-sensitive adhesive composition. The adhesive layer 9 may be partially formed on the outer surface of the breathable or non-breathable sheet layer 7, for example, in a polka dot pattern, a striped pattern, or a lattice pattern. When the adhesive layer 9 is partially formed, if a breathable sheet is used as the layer 7, the surface of the bag body 15 on which the adhesive layer 9 is formed, in other words, both surfaces of the bag body 15 are breathable. It becomes.

  The fiber layer 1 includes a microcapsule that contains a fragrance component or the like (specifically, a blended fragrance or the like).

  The exothermic composition layer 5 is sealed inside the bag body 15. The exothermic composition generates heat due to oxygen reaching the bag through the breathable sheet layer 3 or the breathable sheet layer 3 and the breathable sheet layer 7. Therefore, the heat generating structure 100 is sealed in an outer bag (not shown) and kept in an inert atmosphere until just before use.

  Next, the heat generating structure of the second invention will be described with reference to FIG. 2 showing a cross section of an example of the heat generating structure. The description of the same parts as those of the heat generating structure of the first invention will be omitted.

  The heat generating structure 200 includes the fiber layer 1, the air permeable sheet layer 3, the heat generating composition layer 5, the air permeable or non-air permeable sheet layer 7, and the fiber layer 13 in this order.

  A fiber layer 13 is formed outside the breathable or non-breathable sheet layer 7. Adhesion or fusion between the breathable or non-breathable sheet layer 7 and the fiber layer 13 may be over the entire surface or may be partial. In the case of “partial”, the adhesion or fusion site may be formed in, for example, a polka dot pattern, a stripe shape, or a lattice shape, or only the outer periphery may be adhered or fused. Even if a breathable sheet is used as the sheet constituting the layer 7, if the layer 7 and the fiber layer 13 are entirely bonded or fused, the holes of the breathable sheet are blocked. When adhesion or fusion between the layer 7 and the fiber layer 13 is partial, if a breathable sheet is used as the layer 7, both surfaces of the bag body 15 become breathable.

  In the heat generating structure 200 of the second invention, at least one of the fiber layers 1 and 13 includes a microcapsule containing a fragrance component or the like (specifically, a blended fragrance or the like). When the microcapsules included in the fiber layer 1 and / or 13 are broken, the encapsulated components are released, but some of the components released from the microcapsules are volatile substances. In particular, it is adsorbed by the adsorbent in the heat-generating composition layer 5 through the air-permeable sheet layer 3 and the layer 7 (in the case of being made of an air-permeable sheet). Therefore, it is preferable that the layer 7 is made of a non-breathable sheet and at least the fiber layer 13 holds the microcapsules.

  Furthermore, the heat generating structure of the third invention will be described with reference to FIG. 3 showing a cross section of an example of the heat generating structure. In addition, description is abbreviate | omitted about the part similar to the heat_generation | fever structure of 1st invention or the heat_generation | fever structure of 2nd invention.

  The heat generating structure 300 includes a fiber layer 1, a breathable sheet layer 3, a heat generating composition layer 5, a breathable or non-breathable sheet layer 7, a fiber layer 13, an adhesive layer 9, and a release sheet layer 11 in this order. To do. That is, the heat generating structure 300 is that the adhesive layer 9 and the release sheet layer 11 are formed outside the fiber layer 13 of the heat generating structure 200.

  In the example shown in FIG. 3, the adhesive layer 9 is formed on the entire outer surface of the fiber layer 13. Therefore, even when a breathable sheet is used as the layer 7, oxygen in the air does not reach or hardly reaches the bag because the pressure-sensitive adhesive composition exists outside the layer 7. . However, when the adhesion or fusion between the layer 7 and the fiber layer 13 is made partial, and the adhesive layer 9 is partially formed on the fiber layer 13, for example, in a polka dot pattern, a striped pattern, or a lattice pattern. If a breathable sheet is used as the layer 7, the surface of the bag 15 on which the adhesive layer 9 is formed, in other words, both surfaces of the bag 15 are breathable.

  In the heat generating structure 300 of the third aspect of the invention, at least one of the fiber layers 1 and 13 includes a microcapsule that contains a fragrance component or the like (specifically, a blended fragrance or the like). When the microcapsules included in the fiber layer 1 are broken, the encapsulated components are released, but some of the components released from the microcapsules are breathable, particularly when they are volatile substances. It will be adsorbed by the adsorbent in the exothermic composition layer 5 through the sheet layer 3.

  The volatile substances released when the microcapsules included in the fiber layer 13 are broken are as follows. In the case where a breathable sheet is used as the layer 7, the adhesion or fusion between the layer 7 and the fiber layer 13 is partial, and the adhesive layer 9 is partially formed, the volatile substance A portion can be adsorbed through the layer 7 to the adsorbent in the exothermic composition layer 5. On the other hand, when the adhesive layer 9 is formed over the entire surface, the volatile substance is present in the heat generating structure 300 because of the presence of the adhesive layer 9 regardless of whether or not the volatile substance is adsorbed by the adsorbent. Difficult to be released to the outside.

  As described above, particularly when the component included in the microcapsule is a volatile substance, the layer 7 is constituted by a non-breathable sheet, and the formation of the adhesive layer is partially made, It is preferable to hold the microcapsules at least in the fiber layer 13. Moreover, when forming the adhesion layer 9 on the whole outer surface of the fiber layer 13, it is preferable to make the fiber layer 1 hold | maintain the said microcapsule at least.

  In addition, since a breathable sheet is inferior in strength compared with a non-breathable sheet, a non-breathable sheet is generally used as the layer 7.

  Then, each element which comprises the heat_generation | fever structure of this invention is demonstrated concretely, showing those examples.

  In the present invention, a microcapsule containing aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component is used. The aroma component refers to a substance that emits a scent such as a natural fragrance (vegetable (essential oil), animal), a synthetic fragrance, or a fragrance composition. Anti-pruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal ingredients are menthol, camphor, zinc oxide, catechins, vitamin C, vitamin E, gallic acid esters, salicylic acid esters, Irgasan (trademark), zinc pyrithione It refers to a substance that exhibits a deodorizing or bactericidal effect. Examples of catechins include catechin, epicatechin, gallocatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate, epigallocatechin gallate, and the like, and salicylic acid esters include methyl salicylate.

  In the present invention, the component included in the microcapsule is not limited to a liquid, and is not limited to a volatile substance. Any substance can be used as long as it is a substance exhibiting the above-described effects that can be encapsulated in microcapsules and does not adversely affect the human body.

  When using a poorly water-soluble substance such as a part of the catechins, for example, by heating an aqueous solution containing the water-soluble catechins, the poorly water-soluble catechins are produced, and Soluble catechins may be solid and encapsulated in microcapsules. Alternatively, a suspension containing solid catechins may be encapsulated in microcapsules. Moreover, what is necessary is just to coat | cover the outer surface with the film | membrane agent mentioned later, when the component to be included is solid.

  A microcapsule refers to a fine container in units of microns. There are organic and inorganic types of microcapsules. Furthermore, organic types include core-shell types and matrix types. In the present invention, however, the substance inside the container comes out only after the container (capsule) is destroyed. Comes with core-shell type microcapsules.

  As a raw material constituting the microcapsule, that is, as a film agent, for example, natural rubber such as gelatin, urea resin, urea-formalin resin, melamine resin, urethane resin, polyolefin resin, vinyl chloride resin, polyamide resin, acrylic resin, gum arabic, etc. A wide variety of resins and rubbers such as synthetic rubbers can be used.

  Microcapsule production methods include mechanical methods, physicochemical methods, and chemical methods, and more specifically, orifice method, in situ polymerization method, phase separation method, interfacial polymerization method, coacervation method. In addition, an interfacial precipitation method is known. In addition, a number of patent literatures disclose methods for producing microcapsules. Among them, examples of those referring to perfume microencapsulation include JP-A-5-7766 and JP-A-5-7766. JP 2001-46010, JP 2001-120651, JP 2002-114605, JP 2003-144904, JP 2004-250804, and the like. In the present invention, an aromatic component or the like may be microencapsulated by these known methods.

The fiber layer is composed of one or more selected from the group consisting of nonwoven fabric, woven fabric, knitted fabric, and paper, for example. When the fiber layer is made of nonwoven fabric, the material is, for example, rayon, nylon, polyester, acrylic, polypropylene, vinylon, polyethylene, urethane, cotton, cellulose, etc., and the thickness is usually 20 g / m ^{2 to} 100 g / m ² , preferably 30 g / m ^{2 to} 70 g / m ² , more preferably 40 g / m ^{2 to} 60 g / m ² . When the fiber layer is made of woven fabric, the material is, for example, cotton, rayon, polyester, polypropylene, nylon, acrylic, etc., and the thickness is usually 50 g / m ^{2 to} 150 g / m ² , preferably 60 g / ^{m 2} to 120 g / ^{m 2,} more preferably from 70 g / ^{m 2} to 100 g / ^{m 2.} When the fiber layer is made of knitted fabric, the material is, for example, rayon, polyester, polypropylene, nylon, acrylic, etc., and the thickness is usually 80 g / m ^{2 to} 200 g / m ² , preferably 100 g / m. ^{2 to} 180 g / m ² , more preferably 120 g / m ^{2 to} 150 g / m ² .

  Nonwoven fabrics used for the fiber layer include melt blown nonwoven fabrics, spunbond nonwoven fabrics, and spunlace nonwoven fabrics, and any of them can be used in the present invention.

  As a method for providing the microcapsules to the nonwoven fabric or the like constituting the fiber layer, a method of adhering the microcapsules using a binder resin is common, but when using a nonwoven fabric, the nonwoven fabric is prepared by fusing the fibers. Microcapsules can coexist in the production, and the production of the nonwoven fabric and the attachment of the microcapsules can be performed simultaneously.

  In addition, as the binder resin, the resins listed as examples of the raw materials constituting the microcapsule or a silicone resin can be used.

  Adhesion of microcapsules using a binder resin is, for example, by spraying a liquid composition obtained by adding microcapsules to an aqueous solution or emulsion of a binder resin onto a nonwoven fabric using a spray and drying, or It can be performed by immersing a nonwoven fabric or the like in the liquid composition and then dehydrating and drying. Drying is usually heat drying.

  The air-permeable sheet refers to a polymer film or sheet that allows air to pass through, and a typical example thereof is a non-air-permeable polymer film provided with air holes (for example, a moisture-permeable porous film). The thickness of the moisture-permeable porous film used in the present invention is usually 100 μm or less, preferably 20 to 80 μm, and more preferably 40 to 60 μm.

  Examples of the polymer that is a raw material for the breathable sheet include polyethylene, polypropylene, polyester, polyamide, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene-vinyl acetate copolymer, and polycarbonate.

  The breathable sheet is not limited to a single layer film, and may be a multilayer film.

  Methods for preparing a porous film having a desired air permeability are known. Note that the air permeability of the entire heat generating structure is appropriately adjusted depending on the air permeability of the porous film constituting the air permeable sheet layer and the selection of the bonding conditions between the fiber layer and the air permeable sheet layer.

  The exothermic composition layer is composed of an aeration exothermic composition. Although the component mix | blended with this ventilation exothermic composition will not be specifically limited if it is a component conventionally used for the aeration exothermic composition, If an example is given, it will be as follows.

  Examples of chemical exothermic agents include metal powders such as iron powder (reduced iron powder, atomized iron powder, etc.). Examples of reaction aids include metal halides such as sodium chloride, potassium chloride, magnesium chloride, calcium chloride, ferrous chloride, ferric chloride, potassium sulfate, sodium sulfate, magnesium sulfate, copper sulfate, ferrous sulfate Examples thereof include metal sulfates such as iron and ferric sulfate. Examples of the water retention agent or adsorbent include activated carbon, alumina, silica gel, zeolite, charcoal, and a water-absorbing polymer compound. Of course, water is also used. Examples of other additives include polymer compounds such as carboxymethylcellulose, starch acrylate, polyethylene, polypropylene, polystyrene, isobutylene / maleic acid copolymer salt, polyacrylate, bentonite, vermiculite, perlite, charcoal Etc.

  As the ventilation heat generating composition, it is preferable to use a composition having a prescription in which metal powder such as iron powder is not easily biased.

  The aeration exothermic composition is preferably processed into a sheet shape. In that case, the thickness is preferably 5 mm or less, more preferably 0.5 to 4 mm, and particularly preferably 1 to 2 mm.

  A typical example of a non-breathable sheet is a non-breathable polymer film such as a polyethylene film. The thickness of the non-breathable polymer film is usually 100 μm or less, preferably 10 to 70 μm, more preferably 20 to 50 μm, and particularly preferably 25 to 45 μm.

  Examples of the polymer that is a raw material for the non-breathable sheet include polyethylene, polypropylene, polyester, polyamide, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene-vinyl acetate copolymer, polycarbonate, and the like.

  The non-breathable sheet is not limited to a single layer film, and may be a multilayer film.

  The pressure-sensitive adhesive layer is made of, for example, a pressure-sensitive adhesive composition or a poultice composition.

  Examples of the pressure-sensitive adhesive composition for adhering to a human body or cloth (such as underwear) include rubber-based pressure-sensitive adhesive compositions, acrylic pressure-sensitive adhesive compositions, and other thermoplastic resins (for example, polyamide-based, polyethylene-based, cellulose) PSA composition mainly composed of a resin).

  Examples of the pressure-sensitive adhesive used in the rubber-based pressure-sensitive adhesive composition include diene polymer compounds, specifically, natural rubber, synthetic rubber, or a mixture thereof. Synthetic rubbers include styrene-isoprene block copolymer rubber, styrene-isoprene-styrene block copolymer rubber, styrene-isobutylene-styrene block copolymer rubber, styrene-butadiene rubber, polyisoprene rubber, butyl rubber, chloroprene. Examples thereof include rubber, nitrile rubber, polysulfide rubber, and silicone rubber.

  As the pressure-sensitive adhesive used in the acrylic pressure-sensitive adhesive composition, conventionally used n-butyl (meth) acrylate, hexyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate , One or more (meth) acrylic esters such as tridecyl (meth) acrylate, and (meth) acrylic acid, maleic acid, maleic anhydride, hydroxyethyl acrylate, hydroxypropyl acrylate, copolymerizable with the ester , Acrylamide, dimethylacrylamide, aminoethyl methacrylate, functional monomers such as methacrylic acid (meth) acrylate, or copolymers with vinyl monomers such as acrylonitrile, vinyl acetate, and vinyl propionate.

  The property of the pressure-sensitive adhesive composition used for forming the pressure-sensitive adhesive layer is not particularly limited as long as it can be easily applied to a non-coated surface such as an emulsion, a solvent solution, an aqueous solution, a hot-melt type or the like. .

The thickness of the pressure-sensitive adhesive layer constituted by the pressure-sensitive adhesive composition is usually 20 to 100 μm, preferably 30 to 70 μm.

  Moreover, you may use a poultice composition as an adhesion layer. In the present invention, the definition of the poultice composition includes a gel-like one (for example, a hydrogel composition).

  The poultice composition includes polyvinyl pyrrolidone, polyvinyl alcohol, polyacrylic acid, polyacrylate, starch / acrylic acid copolymer salt, hydroxyethyl cellulose, carboxymethyl cellulose and other high molecular compounds, kaolin, titanium oxide, etc. Excipients, polyvalent metal salts, crosslinkers such as polyvalent metal hydroxides, polyvalent metal oxides, polyhydric alcohols such as glycerin, sorbitol, propylene glycol, surfactants, preservatives or stabilizers, and other conventional More ingredients used in such compositions are included. In particular, a composition containing a carboxyl group-containing polymer compound such as polyacrylic acid and a polyvalent metal salt (for example, aluminum hydroxide or magnesium aluminate metasilicate) as a crosslinking agent is preferable.

  The poultice composition is generally hydrophilic, and its water content is often about 50 to 70% by weight.

  The thickness of the pressure-sensitive adhesive layer constituted by the poultice composition is not particularly limited, but is preferably 4 mm or less, more preferably 0.2 to 3 mm, particularly from the viewpoint of thermal conductivity and usability. It is especially preferable that it is 1-2 mm.

There is a release sheet layer on the surface of the adhesive layer. Any material may be used for the release sheet as long as it is conventionally used for a sheet for covering an adhesive layer of a heat generating structure. For example, various plastic films, thin metal layers, and laminates of plastic films and paper are used as release sheets. The release sheet may be coated with a release coating agent such as silicone, alkyl acrylate, or fluorine. Examples of the raw material polymer constituting the plastic film include polyester, polypropylene, polyethylene, alkylbenzene sulfonic acid and polyvinyl chloride. The heat generating structure of the present invention is stored in an outer bag. The outer bag is made of a moisture-resistant and air-impermeable material. Since the outer bag is non-breathable, the exothermic agent in the ventilating exothermic composition constituting the exothermic composition layer does not undergo a chemical reaction and is therefore stored without generating heat. When the outer bag is opened, air (oxygen) reaches the heat generating agent (iron powder or the like) through the bag of the heating element, thereby starting a chemical reaction and releasing reaction heat.

  A typical example of the outer bag material is a laminate of an aluminum thin layer and a polymer film.

  Next, the manufacturing method of the heat generating structure of this invention is demonstrated.

  The heat generating structure 100 of the first invention is manufactured, for example, as follows.

  A sheet-like material A in which a breathable sheet (becomes the breathable sheet layer 3) and a non-woven fabric with microcapsules (becomes the fiber layer 1) are partially bonded, and a non-breathable sheet (nonbreathable sheet layer 7) Then, a pressure-sensitive adhesive layer 9 formed on one surface of the pressure-sensitive adhesive layer 9 and a sheet-like material B including a release sheet 11 covering the surface of the pressure-sensitive adhesive layer 9 are prepared.

  In addition, formation of the adhesion layer on a non-breathable sheet is performed using coating machines, such as an attached gravure system and a screen printing system, for example. About the same time as the formation of the adhesive layer, the surface is covered with a release sheet.

  The sheet-like material A and the sheet-like material B are arranged so that the air-permeable sheet and the air-impermeable sheet face each other.

  The width direction of the sheet-like material A and the sheet-like material B is heat-sealed, and then both sides thereof are heat-sealed in the longitudinal direction to form a chamber. This chamber is charged with the exothermic composition. Again, the width direction of these sheet-like materials is heat-sealed, and then the longitudinal direction is heat-sealed in the same manner as described above to form a chamber, and the exothermic composition is charged. The chamber containing the exothermic composition is pressed to make the exothermic composition into a layer. Thereafter, the same operation is repeated to obtain a continuous structure of heat generating structures.

  Next, the heat seal portion in the width direction of the continuous material is cut to separate one heat generating structure. This is enclosed in an outer bag made of an oxygen-impermeable material. This cutting and sealing in the outer bag is repeated.

  When using the heat generating structure, it is preferable that the heat generating structure is taken out from the outer bag and then attached to the part to be applied while removing the release sheet.

  The heat generating structure 200 of the second invention is manufactured as follows, for example.

  A sheet-like material A in which a breathable sheet (becomes the breathable sheet layer 3) and a non-woven fabric with microcapsules (becomes the fiber layer 1) are partially bonded, and a non-breathable sheet (nonbreathable sheet layer 7) And a non-woven fabric with microcapsules (becomes the fiber layer 13) are prepared.

  The sheet-like material A and the sheet-like material C are arranged so that the breathable sheet and the non-breathable sheet face each other.

  The width direction of the sheet-like material A and the sheet-like material C is heat-sealed, and then both sides thereof are heat-sealed in the longitudinal direction to form a chamber. This chamber is charged with the exothermic composition. Again, the width direction of these sheet-like materials is heat-sealed, and then the longitudinal direction is heat-sealed in the same manner as described above to form a chamber, and the exothermic composition is charged. The chamber containing the exothermic composition is pressed to make the exothermic composition into a layer. Thereafter, the same operation is repeated to obtain a continuous structure of heat generating structures.

  Next, the heat seal portion in the width direction of the continuous material is cut to separate one heat generating structure. This is enclosed in an outer bag made of an oxygen-impermeable material. This cutting and sealing in the outer bag is repeated.

  The sheet-like material A and a sheet-like material having an adhesive or adhesive layer (the surface of this layer is coated with a release paper) formed on one side of the sheet-like material A were charged while the exothermic composition was charged. You may stick a nonwoven fabric to the adhesion or adhesion layer exposed by peeling a pattern paper.

  The heat generating structure 300 of the third invention is manufactured, for example, as follows. In addition, in the example which shows a manufacturing method below, the adhesion layer 9 is a poultice composition.

  First, a sheet-like material A in which a breathable sheet (becomes breathable sheet layer 3) and a non-woven fabric with microcapsules (becomes fiber layer 1) are partially bonded, and a non-breathable sheet (nonbreathable sheet) Layer 7), an adhesive layer and a sheet-like material D made of release paper.

  The sheet-like material A and the sheet-like material D are arranged so that the breathable sheet and the non-breathable sheet face each other.

  These sheets are heat-sealed in the width direction, and then both sides are heat-sealed in the longitudinal direction to form a chamber. This chamber is charged with the exothermic composition. Again, the width direction of these sheet-like materials is heat-sealed, and then the longitudinal direction is heat-sealed in the same manner as described above to form a chamber, and the exothermic composition is charged. The chamber containing the exothermic composition is pressed to make the exothermic composition into a layer. Thereafter, the same operation is repeated to obtain a continuous inclusion body of the exothermic composition.

  Separately, a sheet-like material E having a nonwoven fabric (becomes the fiber layer 13), a poultice composition layer (becomes the adhesive layer 9) and a release sheet layer (becomes the release sheet 11) in this order is prepared. .

  The release paper of the continuous encapsulated body of the exothermic composition is peeled off, and the sheet-like material E is adhered to the exposed adhesive layer. In addition, it is a surface without the poultice composition layer of a nonwoven fabric to adhere | attach. In this way, a series of exothermic structures is obtained.

  Next, the heat seal portion in the width direction of the continuous material is cut to separate one heat generating structure. This is enclosed in an outer bag made of an oxygen-impermeable material. This cutting and sealing in the outer bag is repeated.

  When using the heat generating structure, it is preferable that the heat generating structure is taken out from the outer bag and then attached to the skin while peeling off the release sheet.

  Hereinafter, the present invention will be described specifically by way of examples.

  The exothermic structure shown in FIG. 3 was manufactured.

(1) Raw materials The raw materials used are as follows.

(A) Spunlace non-woven fabric made of polyester (100%) Non-woven fabric for fiber layer 1 Chinese resident non-woven fabric basis weight: 45 g / m ²
(B) Polyethylene porous film Polyethylene porous film for breathable sheet layer 3 manufactured by Kojin Co., Ltd .; trade name: TSF-BU
Thickness: 50 μm
(C) Exothermic composition The formulation shown in Table 1 prepared by a conventional method

(D) Single-sided adhesive-processed polyethylene film A polyethylene film for the non-breathable sheet layer 7 having an adhesive layer formed on one side The thickness of a polyethylene film manufactured by Daio Paper Industries Co., Ltd .: 40 μm; the thickness of the adhesive layer: 30 μm
The pressure-sensitive adhesive layer is used for adhering the nonwoven fabric for the fiber layer 13.

(E) Melt blown nonwoven fabric Polyester ultrafine fiber nonwoven fabric for fiber layer 13 manufactured by Kuraray Co., Ltd .; trade name: microflex thickness; 40 g / m ²
(F) poultice composition The formulation shown in Table 2 and prepared by a conventional method

(G) Polypropylene film
Polypropylene film thickness for release sheet layer 11: 20 μm
(H) Microcapsule composition The formulation shown in Table 3 and prepared by a conventional method

(2) Production Method (a) Production of Non-woven Fabric with Microcapsules A polyester (100%) spunlace nonwoven fabric for fiber layer 1 was immersed in the microcapsule composition shown in Table 3. The nonwoven fabric was taken out, dehydrated and dried with hot air to attach the microcapsules to the nonwoven fabric.

(B) Manufacture of G film The non-woven fabric with microcapsules manufactured in (a) is made of a polyethylene porous film for the breathable sheet layer 3 and a styrene acrylic emulsion adhesive (manufactured by Nissin Chemical Industry Co., Ltd .; A G film having a water vapor transmission rate of 360 to 430 g / m ² · 24 hours was manufactured by partial adhesion using Viniplan 2760N).

(C) Production of heat generating structure (i) Sheet-like G film, sheet-like single-sided adhesive polyethylene film (the adhesive layer is covered with release paper), porous film and polyethylene film Arranged to face each other.

  (Ii) The width direction of these sheet-like materials was heat-sealed, and then both sides were heat-sealed in the longitudinal direction to form a chamber. In this chamber, the exothermic composition prepared in (1) and (c) was charged. Again, the width direction of these sheet-like materials was heat-sealed, and then the longitudinal direction was heat-sealed in the same manner as described above to form a chamber, and the exothermic composition was charged. The chamber into which the exothermic composition was charged was pressed to make the exothermic composition into a layer. Thereafter, the same operation was repeated to obtain a continuous encapsulated body of the exothermic composition.

    (Iii) Separately, on one surface of the meltblown nonwoven fabric, the poultice composition prepared in (1) and (f) was applied with a thickness of 1.5 mm, and the surface was coated with a polypropylene film as a release sheet. .

(Iv) Peel off the release paper of the continuous encapsulant of the exothermic composition, and paste the sheet-like material prepared in (iii) on the exposed adhesive layer with the non-woven poultice composition side facing the adhesive layer I attached. In this way, a series of exothermic structures was obtained.

    (V) Next, the heat seal portion in the width direction of the continuous material was cut to separate one heat generating structure. This was enclosed in an outer bag made of an oxygen-impermeable material. This cutting and sealing in the outer bag was repeated.

(3) Storage test The exothermic structure manufactured in (2) (enclosed in an outer bag) was stored at room temperature while being allowed to stand or vibrate. The application of vibration was achieved by leaving the heat generating structure in the trunk of the car.

  After a certain period of time, the outer bag was opened, the heat generating structure was taken out, the surface of the spunlace nonwoven fabric made of the fiber layer 1 was lightly rubbed, and it was examined whether or not the menthol odor was generated. The results are shown in Table 4.

  The exothermic structure described in FIG. 2 was manufactured.

(1) Raw materials The raw materials used were the same as those used in Example 1. However, (e) melt blown nonwoven fabric, (f) poultice composition and (g) polypropylene film were not used.

(2) Manufacturing method The nonwoven fabric with a microcapsule and G film were manufactured by the same method as Example 1.

(Manufacture of heat generating structures)
(I) A sheet-like G film and a sheet-like single-sided adhesive-processed polyethylene film (the adhesive layer is covered with a release paper) were disposed so that the porous film and the polyethylene film face each other.

  (Ii) The width direction of these sheet-like materials was heat-sealed, and then both sides were heat-sealed in the longitudinal direction to form a chamber. In this chamber, the exothermic composition prepared in (1) and (c) of Example 1 was charged. Again, the width direction of these sheet-like materials was heat-sealed, and then the longitudinal direction was heat-sealed in the same manner as described above to form a chamber, and the exothermic composition was charged. The chamber into which the exothermic composition was charged was pressed to make the exothermic composition into a layer. Thereafter, the same operation was repeated to obtain a continuous encapsulated body of the exothermic composition.

  (Iii) The release paper of the continuous encapsulant of the exothermic composition was peeled off, and a nonwoven fabric with microcapsules was attached to the exposed adhesive layer. In this way, a series of exothermic structures was obtained.

  (Iv) Next, the heat seal portion in the width direction of the continuous material was cut to separate one heat generating structure. This was enclosed in an outer bag made of an oxygen-impermeable material. This cutting and sealing in the outer bag was repeated.

(3) Odor inspection The outer bag of the heat generating structure (enclosed in the outer bag) manufactured in (2) was opened and the heat generating structure was taken out. When the surface of the spunlace nonwoven fabric which is the fiber layer 1 or 13 was lightly rubbed, a smell of menthol was generated.

It is sectional drawing which shows an example of the heat generating structure of 1st invention. It is sectional drawing which shows an example of the heat generating structure of 2nd invention. It is sectional drawing which shows an example of the heat generating structure of 3rd invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fiber layer 3 Breathable sheet layer 5 Exothermic composition layer 7 Breathable or non-breathable sheet layer 9 Adhesive layer 11 Release sheet layer 13 Fiber layer 15 Bag body

Claims (8)

The fiber layer, the breathable sheet layer, the exothermic composition layer, the breathable or non-breathable sheet layer, the adhesive layer, and the release sheet layer are provided in this order, and the exothermic composition layer includes the breathable sheet layer and the breathable or non-breathable layer. A heat generating structure enclosed in a bag body formed of a breathable sheet layer, wherein the fiber layer contains aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component A heat generating structure comprising a microcapsule. The fiber layer, the breathable sheet layer, the exothermic composition layer, the breathable or non-breathable sheet layer, and the fiber layer are provided in this order, and the exothermic composition layer includes the breathable sheet layer and the breathable or non-breathable sheet layer. A heat generating structure enclosed in a bag body formed of the above, wherein at least one of the fiber layers contains aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial or bactericidal component A heat generating structure comprising a microcapsule. A fiber layer, a breathable sheet layer, a heat generating composition layer, a breathable or non-breathable sheet layer, a fiber layer, an adhesive layer, and a release sheet layer are provided in this order. Exothermic or non-breathable sheet layer is a heat generating structure enclosed in a bag body, and at least one of the fiber layers is aroma, analgesic, anti-inflammatory, analgesic, deodorant, antioxidant An exothermic structure comprising a microcapsule containing an antibacterial or bactericidal component. The heat generating structure according to any one of claims 1 to 3, wherein the fiber layer is composed of at least one selected from the group consisting of a nonwoven fabric, a woven fabric, a knitted fabric, and paper. The heat generating structure according to any one of claims 1, 3, and 4, wherein the adhesive layer is composed of an adhesive composition or a poultice composition. The exothermic structure according to any one of claims 1 to 5, wherein the aroma, antipruritic, anti-inflammatory, analgesic, deodorant, antioxidant, antibacterial, or bactericidal component is a volatile substance. The heat generating structure according to claim 1, further comprising a breathable or non-breathable sheet layer between the breathable or non-breathable sheet layer and the adhesive layer. The heat generating structure according to claim 3, further comprising a breathable or non-breathable sheet layer between the breathable or non-breathable sheet layer and the fiber layer.

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