WO2017042948A1

WO2017042948A1 - Heating compress

Info

Publication number: WO2017042948A1
Application number: PCT/JP2015/075811
Authority: WO
Inventors: 剛伊賀上
Original assignee: 小林製薬株式会社
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2017-03-16
Also published as: JP7008504B2; JPWO2017042948A1

Abstract

The purpose of the present invention is to provide a heating compress that persistently produces a perceived warming or cooling sensation, and that can effectively manifest a thermal effect. A heating compress that is used by being attached to skin, wherein, (1) a packaging material constituting the skin attachment surface side of a container is formed by a laminated sheet formed by laminating, in the following order from an adhesive layer side, at least a moisture absorption layer for absorbing moisture and a moisture barrier layer for blocking the permeation of moisture, (2) an adhesive layer is partially provided to the surface of the moisture absorption layer, and (3) a cooling agent that is perceived to enhance a cooling sensation in the presence of moisture is included in at least one of the adhesive layer and the moisture absorption layer. Thus, the persistence of a perceived warming or cooling sensation is improved, and a remarkably excellent thermal effect is manifested.

Description

Heating tool

The present invention relates to a heating tool. More specifically, the present invention relates to a heating tool that has a persistent perceived warmth and coolness and can effectively exert a warming action.

Heating devices using a heat-generating composition that generates heat upon contact with air are widely used not only as a heat retention device for cold protection, but also as a treatment device for blood circulation promotion and pain relief.

In the case of using a conventional heating device as a treatment device, there is a drawback that in a hot season such as summer, a warm feeling alone is felt as a hot feeling, and the feeling of use becomes worse. Conventionally, it has been known that the thermal sensation of a heating tool can be controlled by adjusting the composition of the exothermic composition, the amount of oxygen inflow by the container containing the exothermic composition, and the like. In the control of warmth, it is possible to adjust the maximum temperature reached, the rate of temperature rise, the duration, etc., and it is not possible to reduce the hotness perceived in hot seasons such as summer.

Therefore, in recent years, heating tools have been developed that reduce the feeling of heat by presenting a cool feeling. For example, Patent Document 1 reports that a heating tool containing a cooling sensation agent that imparts a refreshing feeling to an exothermic composition can perceive a refreshing feeling. Patent Document 2 reports that a heating tool in which a specific amount of a cooling sensate and a sesquiterpene hydrocarbon is blended in an exothermic composition can perceive warmth and coolness. Furthermore, Patent Document 3 discloses that a heating tool in which a specific amount of a monoterpenoid having a cyclic ether structure and a monoterpenoid having a cyclic ketone structure is blended in an exothermic composition is effective in changing the quality of cool feeling during storage. It is reported that it can prevent and maintain a refreshing feeling. However, as in Patent Documents 1 to 3, the technique of blending a cooling sensation agent or the like with the exothermic composition reduces the exhibited warm feeling and cannot achieve both excellent warm feeling and cool feeling. There are drawbacks. In the heating tool, since the exothermic composition is contained in a breathable container, as in Patent Documents 1 to 3, in the heating tool in which a cooling sensation agent or the like is blended with the exothermic composition, Since a part of the cooling sensation agent or the like is volatilized into the atmosphere through the ventilation holes of the container, there is also a disadvantage that the cooling sensation is low. Further, the techniques of Patent Documents 1 to 3 have a drawback that perceptual familiarity is easily generated with respect to warmth and coolness, and the perceived warmth and coolness are inferior in sustainability.

In recent years, consumer demand for improved functionality of heating devices has increased, and the sustainability of perceived warmth and coldness has improved, and the development of a heating device that can effectively exert warmth is eagerly desired. Has been.

JP 2010-158507 A JP 2014-128467 A JP 2011-160885 JP

An object of the present invention is to provide a heating tool that has a persistent perceived warmth and coolness and can effectively exert a warming action.

Means for Solving the Invention

As a result of diligent studies to solve the above-mentioned problems, the present inventor is perceived by providing the following configuration (1) to (3) in a heating tool used by being attached to the skin. It has been found that the sustainability of warm feeling and cool feeling can be improved, and the heat action can be remarkably improved.
(1) The packaging material constituting the skin application surface side of the container is laminated in this order from the adhesive layer side, at least a moisture absorption layer that absorbs moisture and a moisture barrier layer that blocks moisture permeation. The laminated sheet is formed.
(2) An adhesive layer is partially provided on the surface of the moisture absorption layer.
(3) At least one of the pressure-sensitive adhesive layer and the moisture absorption layer contains a cooling sensation agent that is perceived with enhanced cooling feeling in the presence of moisture.

The present invention has been completed by further studies based on such findings. That is, this invention provides the invention of the aspect hung up below.
Item 1. A fever used by being applied to the skin,
A heat generating part that generates heat to be transmitted to the skin;
A container containing the heat generating part and having a skin application surface to be applied to the skin;
An adhesive layer provided on the skin application surface side of the container,
The packaging material constituting the skin application surface side of the container is a laminate in which, from the adhesive layer side, at least a moisture absorbing layer that absorbs moisture and a moisture barrier layer that blocks moisture permeation are laminated in this order. Formed by the sheet,
A cooling sensation agent in which the adhesive layer is partially provided on the surface of the moisture absorption layer, and at least one of the adhesion layer and the moisture absorption layer is perceived with enhanced cooling feeling in the presence of moisture. It is included,
A heating tool characterized by that.
Item 2. Item 1. The area ratio of the adhesive layer forming region where the adhesive layer is provided to the moisture absorbing layer exposed region where the moisture absorbing layer is exposed is 100: 5 to 2000 on the surface of the moisture absorbing layer. The heating tool described in.
Item 3. Item 3. The heating tool according to Item 1 or 2, wherein an exposed region of the moisture absorbing layer where the moisture absorbing layer is exposed communicates with an end of the moisture absorbing layer on the surface of the moisture absorbing layer.
Item 4. Item 4. The heating tool according to any one of Items 1 to 3, wherein the packaging material constituting the skin application surface side of the container has a barrier function of blocking the permeation of the cooling sensation agent.
Item 5. Item 5. The heating tool according to Item 4, wherein the moisture barrier layer includes a resin layer, a vapor deposition film, and / or a metal foil film formed of polyethylene terephthalate, polyacrylonitrile, or ethylene-vinyl alcohol copolymer.
Item 6. Item 6. The heating tool according to any one of Items 1 to 5, wherein the moisture absorbing layer is a fiber sheet.
Item 7. Item 7. The heating tool according to any one of Items 1 to 6, wherein the cooling sensation agent is contained in the adhesive layer.
Item 8. Item 8. The heating tool according to any one of Items 1 to 7, wherein the cooling agent is at least one selected from the group consisting of menthol, camphor, thymol, spirantol, menthyl lactate, and methyl salicylate.
Item 9. Item 9. The heating tool according to any one of Items 1 to 8, wherein the heat generating portion is a heat generating composition that generates heat upon contact with oxygen, and the container has air permeability at least partially.

According to the heating tool of the present invention, it is possible to continuously perceive a warm feeling by the heating portion and a cooling feeling by the cooling agent. Such sustainability of warmth and coolness depends on the specific configuration of the heating tool of the present invention, and is considered to be realized by repeating the following (1) to (4). (1) Skin perspires due to warm feeling imparted from the heat generating part, (2) Moisture absorption layer absorbs sweat, (3) Utilizing the absorbed sweat, cooling sensation by the cooling sensation agent is enhanced (4) When the cool feeling is perceptually accustomed, the warm feeling given from the heat generating part is predominantly perceived.

It is the plane top view seen from the skin sticking surface side about the heating tool of the aspect by which the adhesion layer was provided in the stripe form on the surface of the water | moisture-content absorption layer. It is the plane schematic diagram seen from the skin sticking surface side about the heating tool of the mode in which the adhesion layer was provided in the shape of a dot on the surface of the moisture absorption layer. It is the plane schematic which looked at the heating tool of the aspect by which the adhesion layer was provided in the grid | lattice form on the surface of the water | moisture-content absorption layer seen from the skin sticking surface side. It is the plane schematic which looked at the heating tool of the aspect by which the adhesion layer was provided in the surface of the moisture absorption layer from the skin sticking surface side. It is the plane schematic diagram seen from the skin sticking surface side about the heating tool of the aspect by which the adhesion layer was provided in the frame shape on the surface of the moisture absorption layer. It is the schematic of the cross-sectional structure of one suitable form of the heating tool of this invention.

As described above, the heating tool of the present invention continuously exhibits a warm feeling and a cool feeling, so that it can reduce the feeling of heat and can be used comfortably even in hot seasons and areas. In addition, according to the heating tool of the present invention, a remarkably excellent heat action can be exerted, so that it can be suitably used as a treatment tool for the purpose of promoting blood circulation, improving shoulder stiffness, pain relief, and the like. Furthermore, since the heating tool of the present invention can suppress stickiness due to sweating during use and can also prevent peeling from the skin, an excellent feeling of use can also be obtained.

The heating tool of the present invention is a heating tool used by being attached to the skin, and has a heating part 1 that generates heat to be transmitted to the skin, and a skin application surface that contains the heating part and is attached to the skin. A container 2 and an adhesive layer 3 provided on the skin application surface side of the container are provided. Further, in the heating tool of the present invention, the packaging material 21 constituting the skin application surface side of the container 2 blocks at least the moisture absorption layer 211 that absorbs moisture from the adhesive layer 3 side, and blocks the permeation of moisture. The moisture barrier layer 212 is formed by a laminated sheet laminated in this order, the adhesive layer 3 is partially provided on the surface of the moisture absorbing layer 211, and the adhesive layer 3 And at least one of the moisture absorption layer 211 contains a cooling sensation agent that is perceived with enhanced cooling feeling in the presence of moisture. Hereinafter, the heating tool of the present invention will be described in detail.

In the present invention, “cool feeling” and “warm feeling” refer to senses related to coldness and warmth that are perceived when the heating tool is applied to the skin, respectively, and “thermal action” refers to the heating tool. Physiological effects (blood circulation promotion, stiff shoulder improvement, pain relief, etc.) brought about by the physical fever of the skin and the cold and warm feelings applied to the skin application site.

<Heat generation part 1>
The heating tool of the present invention includes a heating unit 1 that generates heat to be transmitted to the skin as a heating element. The heat generating unit 1 generates heat and plays a role of giving a warm feeling.

The heat generating part 1 is not particularly limited as long as it can generate heat and transmit heat to the skin. For example, a heat generating composition that generates heat by contact with oxygen; Examples include a heating element that generates heat upon receiving microwave irradiation; a heating element that generates heat using a liquid, semi-solid, or solid heat storage material. Among these, the exothermic composition that generates heat upon contact with oxygen can be disposable, and is preferably used as the exothermic part 1 in terms of safety, exothermic efficiency, convenience, and the like.

The composition of the exothermic composition that generates heat upon contact with oxygen is not particularly limited as long as it is conventionally used in a disposable body warmer or the like. A suitable example of the exothermic composition that generates heat upon contact with oxygen is a composition containing an oxidizable metal, an oxidation accelerator, and water.

In the exothermic composition, the oxidizable metal is oxidized by contact with oxygen and serves as a heat source by oxidation heat. The type of oxidizable metal is not particularly limited as long as it can generate heat by oxidation. For example, iron (reduced iron, cast iron, atomized iron, electrolytic iron), aluminum, zinc, manganese, magnesium, calcium, etc. These metals are mentioned. These oxidizable metals may be used individually by 1 type, and may be used in combination of 2 or more type.

Further, the shape of the oxidizable metal is not particularly limited, but from the viewpoint of heat generation efficiency, it is preferably powdery, granular or fibrous, and more preferably powdery.

Among these oxidizable metals, iron powder is preferably used from the viewpoints of safety, handleability, and the like.

When the oxidizable metal is in the form of powder, the particle size is not particularly limited, and examples thereof include 0.01 to 1000 μm, preferably 0.1 to 500 μm, and more preferably 0.5 to 300 μm. Here, the particle size of the powdered oxidizable metal is a value measured according to the “dry sieving test” defined in JIS 8815-1994 “General Rules for Sieving Test Methods”.

The content of the oxidizable metal in the exothermic composition is appropriately set according to the exothermic characteristics to be imparted, and is, for example, 20 to 80% by weight, preferably 25 to 70% by weight, and more preferably 30%. Up to 60% by weight.

In the exothermic composition, the oxidation promoter plays a role of holding oxygen and supplying oxygen to the oxidizable metal. The type of the oxidation accelerator is not particularly limited as long as it can hold oxygen and supply oxygen to the oxidizable metal. For example, activated carbon, carbon black, acetylene black, bamboo charcoal, charcoal, and coffee scum Carbon materials such as charcoal, graphite, coal, coconut shell charcoal, calendar bituminous coal, peat, and lignite. These oxidation promoters may be used alone or in combination of two or more.

Among these oxidation accelerators, preferably activated carbon, carbon black, bamboo charcoal, charcoal, coffee cas charcoal, and more preferably activated carbon.

Further, the shape of the oxidation accelerator is not particularly limited, but from the viewpoint of heat generation efficiency, it is preferably powdery, granular or fibrous, and more preferably powdery.

When the oxidation accelerator is in the form of powder, the particle size is not particularly limited, and examples thereof include 0.001 to 1000 μm, preferably 0.005 to 500 μm, and more preferably 0.01 to 200 μm. Here, the particle size of the powdered oxidation accelerator is a value measured according to the “dry sieving test” defined in JIS 8815-1994 “General rules of sieving test method”.

The content of the oxidation accelerator in the exothermic composition is appropriately set according to the exothermic characteristics to be imparted, etc., for example, 1 to 30% by weight, preferably 3 to 25% by weight, more preferably 5 to 5%. 23% by weight.

In the exothermic composition, the ratio between the oxidizable metal and the oxidation accelerator is appropriately set according to the exothermic characteristics to be imparted. For example, the oxidation accelerator per 100 parts by weight of the oxidizable metal. 2 to 60 parts by weight, preferably 5 to 50 parts by weight, and more preferably 10 to 40 parts by weight.

In the exothermic composition, water plays a role of oxidizing the metal to be oxidized together with oxygen. About water, you may use any of distilled water, ion-exchange water, pure water, ultrapure water, tap water, industrial water, etc.

The water content in the exothermic composition is appropriately set according to the exothermic characteristics to be imparted, and is, for example, 5 to 50% by weight, preferably 10 to 40% by weight, more preferably 15 to 35% by weight. Can be mentioned.

The exothermic composition may contain water-soluble salts, if necessary, in addition to the components described above. When water-soluble salts are contained, it becomes possible to promote oxidation of the oxidizable metal.

The type of water-soluble salt is not particularly limited. For example, alkali metal (sodium, potassium, etc.), alkaline earth metal (calcium, magnesium, etc.), or heavy metal (iron, copper, aluminum, zinc, nickel, silver, Sulfate, hydrogen carbonate, chloride, hydroxide, etc.). Among these water-soluble salts, chlorides such as sodium chloride, potassium chloride, calcium chloride, magnesium chloride, and iron chloride (first and second) are more preferable from the viewpoint of conductivity, chemical stability, and the like. Examples include sodium chloride. These water-soluble salts may be used individually by 1 type, and may be used in combination of 2 or more type.

When water-soluble salts are blended in the exothermic composition, the content thereof is appropriately set according to the exothermic characteristics to be imparted, and is, for example, 0.1 to 10% by weight, preferably 0.5 to 7% by weight, more preferably 1 to 5% by weight.

In addition, the exothermic composition may contain a water retention agent as necessary. The water retention agent plays a role of holding water and supplying water to the oxidation reaction field.

The type of water retention agent is not particularly limited. For example, vermiculite (meteorite), perlite, calcium silicate, magnesium silicate, kaolin, talc, smectite, mica, bentonite, calcium carbonate, silica gel, alumina, zeolite, dioxide Inorganic porous materials such as silicon and diatomaceous earth; organic materials such as pulp, wood flour, cotton, starches, and celluloses; polyacrylic acid resins, polysulfonic acid resins, maleic anhydride resins, polyacrylamide resins And water absorbing resins such as polyvinyl alcohol resins, polyethylene oxide resins, polyaspartic acid resins, polyglutamic acid resins, and polyalginic acid resins. These water retention agents may be used individually by 1 type, and may be used in combination of 2 or more type.

Among these water retention agents, preferably vermiculite, polyacrylic acid resin wood flour, pulp; more preferably vermiculite, polyacrylic acid resin. In addition, when an inorganic porous material is used as a water retention agent, it is possible to secure an air flow path in the exothermic composition.

The particle size of the water retention agent is not particularly limited, and examples thereof include 0.1 to 3000 μm, preferably 0.5 to 1000 μm, and more preferably 1 to 500 μm. Here, the particle size of the water retention agent is a value measured according to the “dry sieving test” defined in JIS8815-1994 “General Rules for Sieving Test Methods”.

When a water retention agent is blended in the exothermic composition, the content thereof is appropriately set according to the exothermic characteristics to be imparted, for example, 1 to 20% by weight, preferably 3 to 15% by weight, Preferably, it is 5 to 10% by weight.

The exothermic composition may further contain other additives such as a sequestering agent, a fragrance, a thickener, an excipient, a surfactant, a hydrogen generation inhibitor, if necessary. .

The exothermic composition can be prepared by mixing a predetermined amount of the aforementioned components. The exothermic composition may be prepared in the presence of oxygen, but is preferably prepared under reduced pressure or an inert gas atmosphere.

The heat generating part 1 is set so as to generate heat at an appropriate temperature when the heating tool of the present invention is applied to the skin. The maximum temperature reached by the heating tool of the present invention may be appropriately set according to the skin site to be applied, the warm feeling to be applied, the thermal action, etc., for example, about 32 to 85 ° C., preferably 34 to About 70 degreeC is mentioned. The maximum temperature reached is a value measured according to the method defined in JIS S4100: 2007.

<Container 2>
The heating tool of the present invention includes a housing 2 that houses the heat generating portion 1. The container 2 has a housing part 22 for housing the heat generating part 1.

The container 2 has a moisture absorption that absorbs at least moisture from the adhesive layer 3 side by the packaging material 21 (hereinafter also referred to as “skin application surface side packaging material”) disposed on the skin application surface side. A layer 211 and a moisture barrier layer 212 that blocks moisture permeation are formed by a laminated sheet laminated in this order. In the skin attachment surface side packaging material, the moisture barrier layer 212 is laminated over the entire surface of the moisture absorption layer 211, and the sweat absorbed by the moisture absorption layer 211 is inside the container 22 or the skin patch surface of the container 2. It is configured to block transmission to the opposite side.

In the skin attachment surface side packaging material 21, the moisture absorption layer 211 absorbs sweat sweated by heat from a portion where the adhesive layer 3 is not provided (moisture absorption layer exposed region), and is applied to the cooling agent provided by the cooling sensation agent. By enhancing the feeling, it plays a role in improving the sustainability of warm and cool feelings. In addition, the moisture absorption layer 211 suppresses stickiness due to sweat during use by absorbing sweat sweat from a portion where the adhesive layer 3 is not provided (moisture absorption layer exposed region), and has an excellent usability. Also plays a role to prepare.

The material constituting the moisture absorbing layer 211 is not particularly limited as long as it has water absorption characteristics, and examples thereof include fiber materials, water absorbent resin materials, sponge-like resin materials, and the like. The moisture-absorbing layer 211 is formed by a method in which these materials are formed in a sheet shape and bonded to the moisture barrier layer 212; a method in which these materials are applied or supported on the moisture barrier layer 212 to form a layer, or the like. Can do. From the viewpoints of feeling of use, adhesion to the pressure-sensitive adhesive layer 3 and the like, a fiber sheet is preferable as a preferred embodiment of the moisture absorption layer 211.

Specific examples of the fiber sheet used as the moisture absorbing layer 211 include a nonwoven fabric and a woven fabric. From the viewpoint of usability and the like, the fiber sheet is preferably a non-woven fabric. The constituent fibers of the fiber sheet are not particularly limited, but for example, synthetic fibers such as polyethylene terephthalate, polybutylene terephthalate, nylon, polypropylene, polyethylene, vinylon, rayon, acrylic, acetate, polyvinyl chloride; cotton, hemp, silk, Natural fibers such as paper; and mixed fibers thereof. Among these constituent fibers, polyethylene terephthalate, nylon and polypropylene are preferable, and polyethylene terephthalate and nylon are more preferable from the viewpoint of enhancing the feeling of use.

In addition, the fiber sheet used as the moisture absorbing layer 211 may have a water-absorbing resin (including a highly water-absorbing resin (SAP)) supported as necessary in order to increase water absorption. Good.

The basis weight of the fiber sheet used as the moisture absorbing layer 211 is not particularly limited, and examples thereof include 10 to 100 g / m ² , preferably 15 to 70 g / m ² , and more preferably 20 to 50 g / m ^2. .

In the skin attachment surface side packaging material 21, the moisture barrier layer 212 allows the permeation of sweat from the moisture absorption layer 211 that has absorbed the perspired sweat to the inside of the container or the outside of the container opposite to the skin application surface. By suppressing, it plays the role which suppresses that the sustainability of a warm feeling and a cold feeling falls.

The constituent material of the moisture barrier layer 212 is not particularly limited, and examples thereof include a resin layer formed of a thermoplastic resin, a vapor deposition film, and a metal foil film. The moisture barrier layer 212 may have a single layer structure composed of only one layer, or may have a multilayer structure composed of two or more layers formed of the same or different materials. From the viewpoint of ease of manufacture of the container 2, it is desirable that at least one of the layers constituting the moisture barrier layer 212 is a resin layer formed of a thermoplastic resin.

Specific examples of the thermoplastic resin forming the resin layer used as the moisture barrier layer 212 include polyethylene terephthalate, polyacrylonitrile, ethylene-vinyl alcohol copolymer, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, Examples include polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, and polycarbonate. Among these thermoplastic resins, polyethylene terephthalate, polyacrylonitrile, ethylene-vinyl alcohol copolymer, polyethylene, polypropylene, and ethylene vinyl acetate copolymer are preferable. When a resin layer formed of a thermoplastic resin is provided as the moisture barrier layer 212, the resin layer may be a single layer or may be formed of two or more layers using the same or different resins.

When a resin layer formed of a thermoplastic resin is provided as the moisture barrier layer 212, the thickness per layer may be appropriately set according to the number of layers constituting the moisture barrier layer 212. 10 to 100 μm, preferably 15 to 70 μm, more preferably 20 to 50 μm.

The material constituting the vapor deposition film used as the moisture barrier layer 212 is not particularly limited as long as it can block moisture permeation. For example, aluminum, chromium, zinc, gold, silver, platinum, nickel, etc. Metals; inorganic oxides such as silicon dioxide, titanium oxide, aluminum oxide and zirconium oxide; inorganic fluorides such as magnesium fluoride.

The thickness of the vapor-deposited film is not particularly limited as long as it is within a range where moisture permeation can be suppressed, and examples thereof include 50 to 5000 mm, preferably 100 to 1000 mm.

The vapor deposition film can be formed by depositing the material on a resin layer or moisture absorption layer 211 formed of a thermoplastic resin by a known vapor deposition method such as physical vapor deposition or chemical vapor deposition. .

Further, examples of the metal foil film used as the moisture barrier layer 212 include aluminum foil and stainless steel foil. Among these metal foils, aluminum foil is preferable.

The thickness of the metal foil film is not particularly limited, but may be 5 to 50 μm, preferably 5 to 15 μm, for example.

The metal foil film can be laminated on a resin layer or moisture absorption layer 211 formed of a thermoplastic resin according to a known laminating method such as dry lamination, extrusion lamination, or heat lamination.

Further, the skin patch surface side packaging material 21 may have a cooling agent barrier function that blocks permeation of the cooling agent contained in the moisture absorbing layer 211 and / or the adhesive layer 3. By having such a cooling agent barrier function, it is possible to suppress the cooling agent contained in the moisture absorption layer 211 and / or the adhesive layer 3 from moving to the side opposite to the skin application surface, so that warm feeling and cooling feeling can be achieved. It is possible to further improve the sustainability of the material and to exert the thermal effect remarkably.

In order to provide the skin patch surface side packaging material 21 with a cooling sensitizer barrier function, for example, at least one layer constituting the moisture barrier layer 212 is formed of a constituent material having both a moisture barrier function and a cooling sensitizer barrier function. Good. Specifically, the moisture barrier layer 212 having a cooling agent barrier function is formed of a thermoplastic resin having a cooling agent barrier function (hereinafter, sometimes referred to as “cooling agent barrier resin”). Resin layer, the deposited film, and the metal foil film.

The type of the cooling sensitizer barrier resin is not particularly limited as long as it can block permeation of the cooling sensitizer, and examples thereof include polyethylene terephthalate, polyacrylonitrile, and ethylene-vinyl alcohol copolymer. Among these cooling sensitizer barrier resins, polyethylene terephthalate is preferable.

In the case where the moisture barrier layer 212a formed of a cooling sensitizer barrier resin is provided, a moisture barrier layer 212b formed of a thermoplastic resin that is further excellent in heat weldability is laminated on the moisture barrier layer 212a. It is desirable to keep it. Specific examples of the thermoplastic resin having excellent heat weldability include polyethylene and polypropylene. In addition, when the moisture barrier layer 212 is a laminate of a moisture barrier layer 212a formed of a cooling sensitizer barrier resin and a moisture barrier layer 212b formed of a thermoplastic resin having excellent heat-weldability. It is desirable that the moisture barrier layer 212a formed of the cooling sensitizer barrier resin is disposed on the skin application surface side.

As a suitable layer structure of the skin attachment surface side packaging material 21, a moisture barrier layer 212b formed of a thermoplastic resin (polyethylene and / or polypropylene) having excellent heat-weldability from the housing portion 22 side toward the adhesive layer 3 side. , A laminated structure in which a moisture barrier layer 212a formed of a cooling sensitizer barrier resin and a moisture absorption layer 211 are laminated in this order; a moisture barrier layer 212b formed of polyethylene and / or polypropylene, a deposited film or a metal Examples include a laminated structure in which the foil film and the moisture absorption layer 22 are laminated in this order.

In the container 2, the packaging material 23 (hereinafter also referred to as “non-skin application surface side packaging material”) disposed on the side opposite to the skin application surface side is the non-container of the container in the conventional heating tool. It can be formed of the same material as the skin-pasted side packaging material. If the exothermic composition that generates heat by contact with oxygen is used as the heat generating part 1, the non-skin application surface side packaging material 23 needs to have air permeability. If other than the exothermic composition is used, it may be either breathable or non-breathable.

The non-skin-pasted side packaging material 23 having air permeability can be formed by, for example, an air-permeable resin layer 231 and a fiber base material 232.

The constituent resin of the breathable resin layer 231 used for forming the non-skin-attached side packaging material 23 having breathability is not particularly limited, and examples thereof include a thermoplastic resin. Specific examples of the thermoplastic resin include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyethylene terephthalate, polyacrylonitrile, ethylene-vinyl alcohol copolymer, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, poly Examples include vinylidene chloride and polycarbonate. Among these thermoplastic resins, polyethylene, polypropylene, and ethylene vinyl acetate copolymer are preferable.

Further, the breathable resin layer 231 may be specifically a resin film provided with pores for ensuring breathability. What is necessary is just to set suitably about the shape of the pore provided in a resin film, a magnitude | size, and a number according to the air permeability which should be equipped with a container.

The thickness of the air-permeable resin layer 231 may be appropriately set according to the layer structure of the non-skin-attached side packaging material 23, and is, for example, 15 to 150 μm, preferably 30 to 100 μm, and more preferably 50 to 80 μm may be mentioned.

Specific examples of the fiber base material 232 used for the non-skin application surface side packaging material 23 include a nonwoven fabric and a woven fabric. From the viewpoint of usability and the like, the fiber base material 232 is preferably a non-woven fabric. The material of the fiber base material 232 is not particularly limited. For example, synthetic fibers such as polyethylene terephthalate, polybutylene terephthalate, nylon, polypropylene, polyethylene, vinylon, rayon, acrylic, acetate, and polyvinyl chloride; cotton, hemp, silk And natural fibers such as paper; and mixed fibers thereof. Among these materials, polyethylene terephthalate, nylon and polypropylene are preferable, and polyethylene terephthalate and nylon are more preferable from the viewpoint of enhancing the feeling of use.

The basis weight of the fiber base material 232 may be set as appropriate according to the layer structure of the non-skin-attached side packaging material, for example, 1 to 100 g / m ² , preferably 5 to 70 g / m ² , and more preferably It can be mentioned 10 ~ 50g / m ^2.

Specifically, as the layer structure of the non-skin-attached side packaging material 23 having air permeability, a single-layer structure composed of the air-permeable resin layer 231 or the fiber base material 232; the air-permeable resin layer 231 and the fiber base material 232 Among them, a multilayer structure in which two or more of the same or different materials are combined is exemplified. From the viewpoints of improving the feeling of use, preventing leakage of the heat generating composition, and the like, preferably a single-layer structure composed of a breathable resin layer 231; the breathable resin layer 231 and the fiber substrate 232 from the inside of the container toward the outside. Are stacked in this order.

The lamination of the air-permeable resin layer 231 and the fiber base material 232 can be performed by a known laminating method such as dry lamination, extrusion lamination, or heat lamination.

Further, when the non-skin-applied surface side packaging material 23 is made non-breathable, the layer structure, the material used, and the like may be the same as those of the skin-applied surface side packaging material 21. However, the vapor-deposited film and the metal foil film do not have to be provided in the non-breathable non-skin application surface side packaging material 23.

The container 2 used in the present invention is formed by laminating the skin application surface side wrapping material 21 and the non-skin application surface side wrapping material 23 around the region to be the storage portion 22 that stores the heat generating portion 1. Is done.

The method for pasting the skin adhesive surface side packaging material 21 and the non-skin adhesive surface side packaging material 23 is not particularly limited. For example, the moisture barrier layer 212 and / or the non-skin adhesive patch included in the skin adhesive surface side packaging material 21 Examples thereof include a method of heat-sealing (heat-sealing) using a resin layer contained in the surface-side packaging material 23, a method of bonding using an adhesive, and the like.

When the exothermic composition that generates heat by contact with oxygen is used as the exothermic part 1, the amount of the exothermic composition that is accommodated in the accommodating part 22 of the container 2 is the skin site to be applied, the exothermic composition. The heat generating property of the composition may be set as appropriate. For example, per 1 cm ^{2 of the} accommodating portion 22, the heat generating composition is about 0.01 to 1.5 g, preferably about 0.05 to 1 g. More preferred is about 0.1 to 0.8 g.

In the container 2 used in the present invention, the number of the accommodating parts 22 that accommodate the heat generating part 1 is not particularly limited, and may be one or plural. It is set appropriately according to Further, the size and shape of the accommodating portion 22 are not particularly limited, and may be appropriately set according to the shape of the skin site to be attached.

<Adhesion layer 3>
In the heating tool of the present invention, the adhesive layer 3 is partially provided on the surface of the moisture absorbing layer 211 (that is, the skin application surface side of the container 2). Thus, by providing the adhesive layer 3 partially, the area | region (henceforth "adhesion layer formation area 3X") in which the adhesive layer 3 was formed in the surface of the skin sticking surface of the heating tool of this invention may also be described. A region where the moisture absorbing layer 211 is exposed (hereinafter, “moisture absorbing layer exposed region 211X”) is formed, and the adhesive layer forming region 3X functions to fix the heating tool on the skin, thereby absorbing moisture. The layer exposed region 211X functions to absorb perspired sweat.

The adhesive layer 3 is formed using an adhesive as a base. An adhesive includes a polymer (adhesive polymer) that exhibits adhesiveness in the presence of an oil or other solvent, and the adhesive polymer is dispersed or dissolved in an oil or other solvent to exhibit adhesiveness. Composition. The kind and composition of the adhesive polymer contained in the adhesive are known, and in the present invention, the adhesive used in the adhesive layer of conventional disposable warmers can be used. Specific examples of the type of pressure-sensitive adhesive include rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and urethane-based pressure-sensitive adhesives.

Specific examples of the adhesive polymer contained in the rubber adhesive include polystyrene-polybutadiene-polystyrene copolymers, polystyrene-polyisoprene-polystyrene copolymers, polystyrene-polyethylene-polybutylene-polystyrene copolymers, Examples thereof include polystyrene-polyethylene-polypropylene-polystyrene copolymers.

Specific examples of the silicone pressure-sensitive adhesive include addition reaction curable silicone pressure-sensitive adhesives and peroxide-curable silicone pressure-sensitive adhesives.

Specific examples of the adhesive polymer contained in the acrylic adhesive include (meth) acrylic polymers having acrylic monomers such as methyl acrylate, ethyl acrylate, 2-ethylhexyl acrylate, and butyl acrylate as structural units. .

Specific examples of the adhesive polymer contained in the urethane-based adhesive include polyols such as polyether polyol, polyester polyol, polycarbonate polyol, and polycaprolactone polyol, and polyisocyanates such as diphenylmethane diisocyanate, tolylene diisocyanate, and hexamethylene diisocyanate. And a urethane resin obtained by the reaction.

These pressure-sensitive adhesives may be used alone or in combination of two or more.

Among these pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives are preferable.

The pressure-sensitive adhesive layer 3 may be formed only of a pressure-sensitive adhesive, and may contain other components such as a cooling sensation agent described later.

When the adhesive layer 3 contains a component other than the adhesive, the content of the adhesive in the adhesive layer 3 may be appropriately set according to the adhesiveness to the skin, the ratio of the adhesive layer forming region, etc. For example, 60 to 99.9% by weight, preferably 70 to 99% by weight, and more preferably 80 to 98% by weight.

It is preferable that the adhesive layer 3 is provided at least in the lower surface region of the housing portion 22 that houses the heat generating portion 1 in the housing body 2. Further, the shape of the adhesive layer forming region is not particularly limited as long as the adhesive layer 3 is partially provided on the surface of the moisture absorption layer 211. For example, the adhesive layer 3 is, for example, a stripe shape, a dot shape, or a lattice shape. , Mesh shape, frame shape surrounding the end of the moisture absorbing layer, and the like.

FIG. 1 shows an example of a mode in which a stripe-shaped adhesive layer forming region 3X is formed. When the stripe-shaped adhesive layer forming region is formed, the stripe width of the adhesive layer forming region 3X may be appropriately set according to the skin part to which the heating tool is applied, the size of the heating tool, etc. The thickness is about 1 to 100 mm, preferably about 3 to 30 mm.

FIG. 2 shows an example in which a dot-shaped adhesive layer forming region 3X is formed. Although FIG. 2 shows an aspect in which circular dots are arranged, the dot shape may be any of an elliptical shape, a polygonal shape, an indefinite shape, and the like. When the dot-shaped adhesive layer forming region 3X is formed, the area per dot may be appropriately set according to the skin site to which the heating tool is applied, the size of the heating tool, etc. About 10000 mm ² , preferably about 500 to 3000 mm ² .

FIG. 3 shows an example of an embodiment in which a lattice-like adhesive layer forming region 3X is formed. When the lattice-shaped adhesive layer forming region 3X is formed, the area per lattice may be appropriately set according to the skin site to which the heating tool is applied, the size of the heating tool, etc. It is about ˜3000 mm ² , preferably about 10 to 1000 mm ² .

FIG. 4 shows an example in which a mesh-like adhesive layer forming region 3X is formed. When forming the mesh-shaped adhesive layer forming region 3X, the line width for forming the mesh may be appropriately set according to the skin site to which the heating tool is applied, the size of the heating tool, etc. About 100 to 100 mm, preferably about 3 to 30 mm.

FIG. 5 shows an example in which a frame-shaped adhesive layer forming region 3X is formed. When the frame-shaped adhesive layer forming region 3X is formed, the width of the frame may be appropriately set according to the skin site to which the heating tool is applied, the size of the heating tool, etc., for example, about 1 to 100 mm Preferably, the thickness is about 3 to 50 mm.

Further, it is preferable that the formed moisture absorption layer exposed region 211X communicates with the end of the moisture absorption layer 211. When the moisture absorption layer exposed region 211X communicates to the end of the moisture absorption layer 211, the air passage can be secured when the heating tool is applied to the skin, and stickiness due to sweating during use is more effective. As an aspect in which the moisture absorption layer exposed region 211X that can be suppressed to the end is connected to the end of the moisture absorption layer 211, specifically, an aspect in which the adhesive layer 3 is formed in a stripe shape or a dot shape Is mentioned.

The area ratio between the adhesive layer forming region 3X and the moisture absorbing layer exposed region 211X may be appropriately set according to the adhesiveness to the skin to be applied, etc. For example, the adhesive layer forming region 3X: the moisture absorbing layer exposed region 211X The area ratio is usually 100: 5 to 2000, preferably 100: 10 to 400, and more preferably 100: 25 to 150.

The application amount of the adhesive layer 3 may be appropriately set according to the adhesiveness to the skin to be applied, the ratio of the adhesive layer forming region 3X, etc. For example, as the application amount of the adhesive layer 3 in the adhesive layer forming region 3X Usually, 20 to 150 g / m ² , preferably 40 to 120 g / m ² , more preferably 60 to 100 g / m ² can be mentioned.

The pressure-sensitive adhesive layer 3 is formed by applying a known coating method to the moisture absorption layer 211 of the skin patch surface side packaging material 21 constituting the container 2.

<Cool Sensitive>
In the heating tool of the present invention, at least one of the pressure-sensitive adhesive layer 3 and the moisture absorption layer 311 includes a cooling sensation agent that is perceived by enhancing the cooling sensation in the presence of moisture. The cooling sensate imparts a cooling sensation and contributes to an excellent thermal action.

"Cool sensation perceived with increased cooling sensation in the presence of moisture" means that the presence of moisture in the sensation that gives the skin a feeling of cooling, compared to the case in the absence of moisture, A cooling agent that enhances the perceived cooling sensation. The cooling sensation agent that is perceived by enhancing the cooling sensation in the presence of moisture is known in the art, and the type thereof is not particularly limited, but specifically, menthol, camphor, thymol, spirantol, Menthyl lactate, methyl salicylate and the like can be mentioned.

Among the cooling sensates, menthol may be any of d-form, l-form, and dl-form, preferably l-form. Moreover, menthol may use a refined product and may use it in the state of an essential oil. The essential oil containing menthol can be appropriately selected from known ones, and examples thereof include peppermint oil, peppermint oil, spearmint oil, and the like.

Also, among the cooling sensates, camphor may be any of d-form, l-form, and dl-form, preferably dl-form. In addition, camphor may be used as a refined product or as an essential oil. The essential oil containing camphor can be appropriately selected from known ones and used.

These cooling sensates may be used alone or in combination of two or more.

Among these cooling agents, menthol is preferable from the viewpoint of further improving the sustainability of the cooling sensation and warming sensation and exhibiting a superior thermal action.

The cooling sensation agent may be contained in either one of the pressure-sensitive adhesive layer 3 or the moisture absorption layer 211, or may be contained in both of them. It is preferable that the cooling sensation agent is contained at least in the pressure-sensitive adhesive layer 3 from the viewpoint of further enhancing the cooling sensation and warming sensation and further improving the thermal action.

What is necessary is just to set suitably about content of the said cooling sensation agent in the adhesion layer 3 and / or the moisture absorption layer 211 according to the kind of cooling sensation agent to be used, the kind of layer containing a cooling sensation agent, etc. When the cooling sensation agent is contained in the pressure-sensitive adhesive layer 3, the content of the cooling sensation agent in the pressure-sensitive adhesive layer 3 is, for example, 0.1 to 10% by weight, preferably 0.5 to 8% by weight. More preferred is 1 to 5% by weight. Further, in the case of incorporating the cooling agent to the water absorption layer 211, the content of the cooling agent per unit area of the moisture-absorbing layer 211, 0.5 ~ 500 mg / cm ^2, preferably from 1 to 300 mg / cm ² , more preferably 5 to 150 mg / cm ² is mentioned.

When the adhesive layer 3 contains a cooling sensation agent, a composition for the adhesive layer is prepared by mixing the adhesive used as the base of the adhesive layer 3 and the cooling sensation agent, and this is applied onto the moisture absorbing layer 211. do it. When the moisture absorption layer 211 contains a cooling sensation agent, the moisture absorption layer 211 is sprayed with a liquid containing a cooling sensation agent, the liquid containing a cooling sensation agent is impregnated with the moisture absorption layer 211, or the like. The cooling sensation agent may be supported on the moisture absorption layer.

<Other ingredients>
The adhesive layer 3 and / or the moisture absorption layer 211 may contain other pharmacological components and cosmetic components as necessary in addition to the cooling sensation agent. Examples of such pharmacological ingredients and cosmetic ingredients include blood circulation promoters such as acidic mucopolysaccharides, chamomiles, horse chestnuts, ginkgo, hamamel extract, grapefruit extract, rosemary extract, lemon extract, vitamin E, nicotinic acid derivatives; Moisturizers such as glycerin, ceramide, collagen, hyaluronic acid and squalane; fatigue relieving agents such as basil extract and juniper extract; analgesics such as indomethacin, diclofenac, flurbiprofen, ketoprofen, piroxicam, felbinac, methyl salicylate and glycol salicylate ; Tea extract, ginseng extract, caffeine, horse chestnut, aminophylline, escin, anthocyanidin, organic iodine compound, hypericum grass extract, spruce grass extract, cedar, mannenro , Slimming agents such as ivy, thiomucase, hyaluronidase; swelling improving agents such as terminaria, bisnaga, mayus, horse chestnut, anthocyanin, vitamin P, calendula, concolitic acid, silanol, etc .; peeling agents such as protease; thioglycol Hair removal agents such as calcium acid; Autonomic nerve regulators such as γ-oryzanol; Fragrances such as natural fragrances and individual fragrances.

These pharmacological components and cosmetic components may be contained in either the pressure-sensitive adhesive layer 3 or the moisture absorbing layer 211. From the viewpoint of effectively exerting pharmacological action and cosmetic action, the pressure-sensitive adhesive layer 3 It is preferable that it is contained.

These pharmacological ingredients and cosmetic ingredients may be used alone or in combination of two or more. What is necessary is just to set suitably about content of the pharmacological component and cosmetics component in the adhesion layer 3 and / or the water | moisture-content absorption layer 211 according to the pharmacological effect or cosmetic effect which should be provided. Further, the method for containing these components in the adhesive layer 3 and / or the moisture absorbing layer 211 is the same as in the case of the cooling sensation agent.

<Release layer>
In the heating tool of the present invention, a peelable release layer may be provided on the surface of the pressure-sensitive adhesive layer 3 (side attached to the skin) as necessary. When the release layer is provided, it is possible to prevent drying of the pressure-sensitive adhesive layer during storage, volatilization prevention of the cooling sensation agent during storage, prevention of deterioration in handleability due to adhesion of the pressure-sensitive adhesive layer, and the like.

Examples of the release layer include resin films such as polyethylene terephthalate, polyacrylonitrile, ethylene-vinyl alcohol copolymer, and polypropylene; and paper that has been subjected to release imparting processing such as silicon processing. Moreover, even if it is a case where a resin film is used as a mold release layer, mold release provision processes, such as a silicon process, may be given. Among these release layers, resin films such as polyethylene terephthalate, polyacrylonitrile, and ethylene-vinyl alcohol copolymer are preferable because adsorption of active ingredients in the adhesive layer 3 can be suppressed.

<Preferred embodiment>
A schematic diagram of a cross-sectional structure of a preferred embodiment of the heating tool of the present invention is shown in FIG. In the heating tool shown in FIG. 6, the container 2 having the container 22 is formed by pasting the ends of the skin patch surface side packaging material 21 and the non-skin patch side packaging material 23 together. 2, the exothermic composition which generates heat by contact with oxygen is housed as the heat generating portion 1. In the heating tool shown in FIG. 6, the skin application surface side packaging material 21 of the container 2 is formed of a thermoplastic resin (polyethylene and / or polypropylene) having excellent weldability from the container 22 side toward the skin application surface. The moisture barrier layer 212b, the moisture barrier layer 212a formed of a cooling sensitizer barrier resin, and the moisture absorption layer 211 are formed of a laminated sheet laminated in this order. In the heating tool shown in FIG. 6, the non-skin application surface side packaging material 23 of the container 2 is formed by laminating the breathable resin layer 231 and the fiber base material 232 in this order from the container 22 side toward the outside. It is formed with a laminated sheet. Further, in the heating tool shown in FIG. 6, the adhesive layer 3 is partially provided on the surface of the moisture absorption layer 211 that constitutes the skin attachment surface side packaging material 21. In FIG. 6, the release layer is omitted for convenience.

<Usage and packaging>
The heating tool of the present invention is used as a body warming tool or a therapeutic tool by applying an adhesive layer to the skin. In particular, since the heating tool of the present invention can exhibit a remarkably excellent heat action, it is particularly suitably used as a therapeutic tool for promoting blood circulation, alleviating pain, improving shoulder stiffness and the like.

The skin site to which the heating tool of the present invention is applied is not particularly limited, and examples thereof include eyes, face, neck, shoulders, waist, back, abdomen, buttocks, arms, legs, and soles.

When the heating part 1 is a heat-generating composition that generates heat by contact with oxygen, the heating tool of the present invention is packaged in a packaging material having an oxygen barrier property, and the heat-generating composition is not in contact with air. Provided in. When the packaging material is opened at the time of use, the exothermic composition comes into contact with air and heat generation starts.

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

Test example 1
Manufacturing heating devices (Examples 1 to 3 and Comparative Example 1) in which the area ratio of the adhesive layer forming region and the moisture absorption layer exposed region is different, and for each heating device, the sustainability of warmth and cooling sensation, adhesion to the skin Sexuality and usability were evaluated. About the manufacturing method and evaluation method of each heating tool, it is as showing below.

1. Production of heating tools
Example 1
A skin application surface side packaging material (rectangular 13 cm long, 9.5 cm wide) made of a non-breathable laminated sheet in which a polyethylene film, a polyethylene terephthalate film, and a nonwoven fabric (made of polyethylene terephthalate) were laminated in this order was prepared. The adhesive layer forming composition A having the following composition that is partially heated and mixed at 140 ° C. with respect to the surface of the non-woven fabric of the skin adhesive surface side packaging material has an application amount of the adhesive layer forming region of 100 g / m ^2. The adhesive layer was partially formed on the skin sticking surface side packaging material by coating and cooling as described above. The adhesive layer is partially formed in a stripe shape in which the adhesive layer forming region has four stripes in the vertical direction and three moisture absorption layer (nonwoven fabric) exposed regions between them, and the stripe width of the adhesive layer forming region Was 19 mm, the width of the moisture absorbing layer (nonwoven fabric) exposed region was 6.3 mm, and the area ratio of the adhesive layer forming region: moisture absorbing layer exposed region was set to 80:20.
<Adhesive layer forming composition A>
Menthol (Brand name "Thin Cargo", manufactured by Nagaoka Business Co., Ltd.) 2.5% by weight
Rubber adhesive 97.5% by weight
Total 100% by weight

Next, a release layer (rectangle of 13 cm length and 9.5 cm width) made of a polyethylene terephthalate film subjected to silicon processing was bonded to the adhesive layer on the skin-pasted surface side packaging material.

Separately, a non-skin-attached side packaging material (rectangular with a length of 13 cm and a width of 9.5 cm) made of a breathable laminated sheet in which a polyethylene film with pores and a nonwoven fabric (made of polyethylene terephthalate) are laminated is prepared. did.

Next, 22 g of iron powder, 6 g of activated carbon, 10 g of a water-soluble salt / water retention agent / water mixture (mixture of sodium chloride, water absorbent resin, meteorite, water, etc .; containing 8.5 g of water) are mixed to produce an exothermic composition. Prepared. 38 g of the obtained exothermic composition was sandwiched between the polyethylene film side of the skin adhesive surface side packaging material and the polyethylene film side of the non-skin adhesive surface side packaging material, and the ends of these packaging materials were heat welded together. Thus, a heating tool in which the exothermic composition was accommodated in the accommodating portion (vertical 12 cm, lateral 8.5 cm) was manufactured. The manufactured heating tool was quickly accommodated in a sealed bag.

Example 2
For the partial formation of the adhesive layer provided on the skin patch side packaging material, the adhesive layer forming region has a stripe width of 14.25 mm, the moisture absorbing layer (nonwoven fabric) exposed region has a lateral width of 12.7 mm, and the adhesive layer forming region: A heating tool was manufactured under the same conditions as in Example 1 except that the area ratio of the moisture absorption layer exposure region was set to 60:40.

Example 3
For the partial formation of the adhesive layer provided on the skin patch side packaging material, the stripe width of the adhesive layer forming region is 9.5 mm, the lateral width of the moisture absorbing layer (nonwoven fabric) exposed region is 19 mm, the adhesive layer forming region: moisture absorption A heating tool was manufactured under the same conditions as in Example 1 except that the area ratio of the layer exposure region was set to 40:60.

Comparative Example 1
The same conditions as in Example 1 except that the adhesive layer was formed on the entire surface of the non-woven fabric of the skin attachment surface side wrapping material (that is, the area ratio of the adhesive layer forming region to the moisture absorbing layer exposed region was 100: 0). A heating tool was manufactured.

2. Performance evaluation Each heating tool was affixed to the waist of 10 subjects. Two hours after application, the perceived warmth and coldness, adhesion to the skin, and feeling of use are scored according to the following criteria. For each evaluation item, the average score is 2 or more and 3 or less. The case of A, 1 or more and less than 2 was judged as B, the case of 0.5 or more and less than 1 was judged as C, and the case of less than 0.5 as D.

(Criteria for warm and cold feeling)
3 points: Can be perceived sufficiently.
2 points: Perceivable.
1 point: weak but perceptible.
0 points: cannot be perceived.

(Criteria for adhesion to skin)
3 points: There is no peeling of the end portion and the adhesive state can be sufficiently maintained.
2 points: Slight peeling or the like of the end is observed, but the adhesion state can be sufficiently maintained.
1 point: Peeling of the edge is recognized, and the adhesion state is somewhat unstable.
0 point: Exfoliation of the end portion is often observed, and the adhesion state is unstable.

(Usage criteria)
3 points: There is no stickiness due to sweat and the feeling of use is very good.
Two points: Stickiness due to sweat is slightly felt, but the feeling of use is good.
1 point: Stickiness due to sweat is felt, and the feeling of use is slightly bad.
0 points: Stickiness due to sweat is strongly felt, and the feeling of use is bad.

3. The results obtained are shown in Table 1. As is clear from Table 1, when the adhesive layer is provided on the entire surface of the skin application surface side packaging material, the persistence of the cold feeling is inferior, and the adhesion to the skin and the feeling of use are also poor. It was not satisfactory (Comparative Example 1). On the other hand, when the adhesive layer is partially provided on the skin application surface side of the packaging material on the skin application surface side, the sustainability of warm feeling and cold feeling is improved, and the adhesiveness to the skin and the use The feeling was also improved (Examples 1 to 3). In particular, when the area ratio of the adhesive layer forming region: the moisture absorbing layer exposed region is 80:20 to 60:40, the sustainability of the warm feeling and the cool feeling is remarkably excellent, and the adhesion to the skin and the use The feeling was also good (Examples 2 and 3).

Test example 2
Manufacture of heating tools (Examples 2 and 4 and Comparative Examples 2 to 5) having different structures and additive components in the adhesive layer on the side of the skin application surface, and the sustainability of warmth and coolness for each heating tool The adhesiveness to the skin and the feeling of use were evaluated. The manufacturing method and evaluation method of the heating tool of Example 4 and Comparative Examples 2 to 5 are as follows.

1. Production of heating tools
Example 4
A heating tool was produced under the same conditions as in Example 2 except that the adhesive layer was formed using the adhesive layer forming composition B having the following composition.
<Adhesive layer forming composition B>
Peppermint oil (trade name “Falcolex Peppermint B”, manufactured by Ichimaru Falcos) (liquid) 8% by weight
92% by weight of rubber adhesive
Total 100% by weight

Comparative Example 2
A skin-applied surface-side packaging material (13 cm long, 9.5 cm wide rectangle) made of a non-breathable laminated sheet in which a polyethylene film and a polyethylene terephthalate film were laminated in this order was prepared. A heating tool was manufactured under the same conditions as in Example 2 except that the adhesive layer was partially formed on the surface of the polyethylene terephthalate film of the skin adhesive surface side packaging material.

Comparative Example 3
A breathable skin-applied surface-side packaging material (rectangle of 13 cm length and 9.5 cm width) consisting only of a nonwoven fabric (made of polyethylene terephthalate) was prepared. A pressure-sensitive adhesive layer was partially formed under the same conditions as in Example 2 with respect to one surface of the skin adhesive surface side packaging material. Separately, a non-skin-attached side packaging material (rectangular 13 cm long and 9.5 cm wide) made of a non-breathable laminated sheet in which a polyethylene film and a nonwoven fabric (made of polyethylene terephthalate) are laminated was prepared.

Next, a container (12 cm in length) was used under the same conditions as in Example 2 except that the end of the skin adhesive surface side packaging material on the polyethylene film side and the end of the non-skin adhesive surface side packaging material were adhered with spray glue. , 8.5 cm), a heating tool in which the exothermic composition was accommodated was manufactured.

Comparative Example 4
A heating tool was produced under the same conditions as in Example 2 except that the adhesive layer was formed using Composition C for forming an adhesive layer having the following composition.
<Adhesive layer forming composition C>
dl-α-tocopherol; Vitamin E (trade name “Vitamin E Linoleate Mixture”, manufactured by Eisai Food Chemical Co., Ltd.) (Oil) 5% by weight
Rubber adhesive 95% by weight
Total 100% by weight

Comparative Example 5
A heating tool was produced under the same conditions as in Comparative Example 2 except that the adhesive layer was formed using the adhesive layer forming composition C.

2. Performance Evaluation The sustainability of the warm and cold sensation of each heating tool, the adhesion to the skin, the feeling of use, and the back pain alleviating effect were evaluated. The sustainability of the warm feeling and the cool feeling, the adhesion to the skin, and the feeling of use were evaluated by the same method as in Test Example 1. The evaluation method of the back pain alleviation effect is as shown below.

A heating tool was affixed to the lower back of 10 subjects who had back pain for 8 hours. 8 hours after application, the lower back pain alleviating effect was scored according to the following criteria, A when the average score was 2 or more and 3 or less, A when 1 or less and less than 2, and C when 0.5 or less and less than 1. The case of less than 0.5 was determined as D.
(Criteria for reducing back pain)
3 points: Back pain is remarkably relieved.
2 points: Low back pain is relieved.
1 point: Low back pain is slightly relieved.
0 points: Relief of back pain is not recognized.

3. The results obtained are shown in Table 2. In the case of a heating tool that does not have a moisture absorbing layer (nonwoven fabric) on the skin patch side packaging material, even if menthol is included in the partially provided adhesive layer, there is no persistence of cold feeling and adhesion to the skin Also, the feeling of use and the low back pain mitigating effect were insufficient (Comparative Example 2). Moreover, in the heat generating tool which did not provide a moisture barrier layer, even if menthol was included in the partially provided adhesive layer, the sustainability of the cold sensation and the low back pain mitigating effect were not satisfactory (Comparative Example 3). On the other hand, when the partially provided adhesive layer contains vitamin E, which is known to promote blood circulation, a cold sensation cannot be obtained regardless of the presence or absence of a moisture absorption layer (nonwoven fabric), and the low back pain relief effect It was insufficient (Comparative Examples 4 and 5). On the other hand, the adhesive layer containing a cooling sensation agent (menthol, peppermint oil) is partially provided on the skin patch side packaging material on which the moisture absorption layer (nonwoven fabric) and moisture barrier layer (resin film) are laminated. In this case, the warm and cold sensation was excellent, and a remarkably excellent low back pain relieving effect was observed, and the adhesion to the skin and the feeling of use were also good (Examples 2 and 4).

DESCRIPTION OF SYMBOLS 1 Heat generation part 2 Container 21 Skin sticking surface side packaging material 211 Moisture absorption layer 212 Moisture barrier layer 212a Moisture barrier layer (resin layer) which has a cooling agent barrier function
212b Moisture barrier layer (resin layer) with excellent thermal weldability
22 Housing part 23 Non-skin application surface side packaging material 231 Breathable resin layer 232 Fiber base material 3 Adhesive layer

Claims

A fever used by being applied to the skin,
A heat generating part that generates heat to be transmitted to the skin;
A container containing the heat generating part and having a skin application surface to be applied to the skin;
An adhesive layer provided on the skin application surface side of the container,
The packaging material constituting the skin application surface side of the container is a laminate in which, from the adhesive layer side, at least a moisture absorbing layer that absorbs moisture and a moisture barrier layer that blocks moisture permeation are laminated in this order. Formed by the sheet,
A cooling sensation agent in which the adhesive layer is partially provided on the surface of the moisture absorption layer, and at least one of the adhesion layer and the moisture absorption layer is perceived with enhanced cooling feeling in the presence of moisture. It is included,
A heating tool characterized by that.
The area ratio of the adhesive layer forming region where the adhesive layer is provided to the moisture absorbing layer exposed region where the moisture absorbing layer is exposed is 100: 5 to 2000 on the surface of the moisture absorbing layer. The heating tool according to 1.
The heating tool according to claim 1 or 2, wherein, on the surface of the moisture absorption layer, a moisture absorption layer exposed region where the moisture absorption layer is exposed communicates with an end of the moisture absorption layer.
The heating tool according to any one of claims 1 to 3, wherein the wrapping material constituting the skin application surface side of the container has a barrier function to block permeation of the cooling sensation agent.
The heating tool according to claim 4, wherein the moisture barrier layer has a resin layer, a vapor deposition film, and / or a metal foil film formed of polyethylene terephthalate, polyacrylonitrile, or an ethylene-vinyl alcohol copolymer.
The heating tool according to any one of claims 1 to 5, wherein the moisture absorption layer is a fiber sheet.
The heating tool according to any one of claims 1 to 6, wherein the cooling agent is contained in the adhesive layer.
The heating tool according to any one of claims 1 to 7, wherein the cooling agent is at least one selected from the group consisting of menthol, camphor, thymol, spiranthol, menthyl lactate, and methyl salicylate.
The heating tool according to any one of claims 1 to 8, wherein the heat generating portion is a heat generating composition that generates heat upon contact with oxygen, and the container has air permeability at least partially.