WO2022259588A1 - 温熱具 - Google Patents

温熱具 Download PDF

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Publication number
WO2022259588A1
WO2022259588A1 PCT/JP2022/000080 JP2022000080W WO2022259588A1 WO 2022259588 A1 WO2022259588 A1 WO 2022259588A1 JP 2022000080 W JP2022000080 W JP 2022000080W WO 2022259588 A1 WO2022259588 A1 WO 2022259588A1
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WO
WIPO (PCT)
Prior art keywords
water
heating
sheet
heat
heating tool
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Application number
PCT/JP2022/000080
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English (en)
French (fr)
Japanese (ja)
Inventor
穂貴 高桑
靖博 志田原
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN202280038106.3A priority Critical patent/CN117396579A/zh
Priority to JP2023527477A priority patent/JP7332839B2/ja
Priority to KR1020237026671A priority patent/KR102665906B1/ko
Publication of WO2022259588A1 publication Critical patent/WO2022259588A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/02—Compresses or poultices for effecting heating or cooling
    • A61F7/03—Compresses or poultices for effecting heating or cooling thermophore, i.e. self-heating, e.g. using a chemical reaction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/06—Artificial hot-air or cold-air baths; Steam or gas baths or douches, e.g. sauna or Finnish baths
    • A61H33/12—Steam baths for the face
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/16—Materials undergoing chemical reactions when used
    • C09K5/18—Non-reversible chemical reactions

Definitions

  • the present invention relates to a heating tool.
  • Heating tools that use the heat generated by the oxidation reaction of oxidizable metals are used for various purposes.
  • the present applicant has previously proposed a heat-generating portion comprising a heat-generating layer made of a heat-generating composition containing an oxidizable metal, water, and a water-retaining agent, and a water-retaining sheet containing a polymer, and a heat-generating portion.
  • proposed a steam heating device including a bag See Patent Document 1).
  • this heating tool has a mass ratio of water contained in the entire heating tool with respect to 100 parts by mass of the oxidizable metal being 40 parts by mass or more and 80 parts by mass or less.
  • the heating element includes a powder of oxidizable metal, a powder of carbon material, water, and an electrolyte.
  • the heating element is a sheet.
  • a value obtained by multiplying the ratio of the content mass of the water to the content mass of the oxidizable metal powder by 100 [100 x (water/oxidizable metal powder)] is It is 95 or more and 130 or less.
  • the heat generator has a ratio of the water content to the carbon material powder content of 6 or more and 30 or less.
  • FIG. 1(a) and 1(b) are cross-sectional views schematically showing aspects of a heating element in a heating tool.
  • 2(a) to 2(c) are cross-sectional views schematically showing the arrangement of the heating element and the water-absorbing resin layer in the heating tool.
  • FIG. 3 is a cross-sectional view schematically showing another arrangement mode of the heating element and the water-absorbent resin layer in the heating tool.
  • FIG. 4 is a plan view schematically showing one embodiment of a heating tool.
  • 5 is an exploded perspective view schematically showing the heating tool shown in FIG. 4.
  • FIG. FIG. 6 is a schematic cross-sectional view of the heating tool shown in FIG. 4 along the lateral direction, which is the longitudinal direction.
  • FIG. 7 is a schematic diagram of an enlarged cross-section of the heating implement shown in FIG.
  • FIG. 8 is a diagram schematically showing how the heating tool shown in FIG. 4 is used.
  • FIG. 9 is a plan view schematically showing another embodiment of the heating tool.
  • FIG. 10 is a plan view schematically showing still another embodiment of the heating tool.
  • FIG. 11 is a perspective view schematically showing still another embodiment of the heating tool.
  • FIG. 12 is a schematic diagram of a device for measuring the amount of steam generated from a heating tool.
  • the present invention relates to a heating tool that is excellent in temperature characteristics, temperature sustainability, and steam generation amount due to heat generation, while suppressing manufacturing costs.
  • “Temperature characteristics” in the present disclosure means that the maximum temperature reached by heat generation of the heating tool is high, and the maximum temperature is preferably 38° C. or more and 42° C. or less. As a result, it is possible to facilitate early transfer or perception of heat to the object to be heated.
  • “temperature persistence” means that the temperature is maintained at a predetermined temperature or higher for a long time due to the heat generated by the heating tool, and the predetermined temperature is preferably 38°C or higher. This makes it easier to transmit or perceive heat to the object to be heated for a long period of time.
  • the heating tool of the present disclosure is used to apply heat to the object to be heated by bringing it into contact with the object to be heated when it is used.
  • Objects to be heated include, for example, articles having a hard surface, human eyes, mouth, nose and surrounding skin and mucous membranes, throat, face, scalp, neck, arms, shoulders, legs, knees, and abdomen. , back, waist, and buttocks, but not limited to these.
  • Examples of the heating tool of the present disclosure include the following aspects (a) to (d), but are not limited to these aspects.
  • (a) A configuration of an eye mask that can be held on and around the eye.
  • (b) A sticking form configured to be held on the neck, arm, shoulder, leg, elbow, knee, forehead, abdomen, back or waist.
  • (c) A form of face mask that can be held over the mouth, nose and surroundings, or over the entire face.
  • the shape of a cup configured to be abuttable on the mouth, nose and surroundings. All disclosures herein are applicable to all aspects (a) through (d) above.
  • a heating tool of the present disclosure includes a heating element.
  • the heating element preferably contains (1) oxidizable metal powder, (2) carbon material powder, (3) water, and (4) electrolyte.
  • the oxidizable metal powder has the function of generating heat due to an oxidation reaction with oxygen in the air and applying heat to an object to be heated.
  • the powder of the carbon material has the function of promoting the oxidation reaction of the oxidizable metal and efficiently generating heat.
  • Water has the function of facilitating the interaction between the oxidizable metal powder and the carbon material or the like that serves as an oxidation reaction catalyst.
  • the electrolyte has a function of increasing heat generation efficiency when promoting the oxidation reaction of the oxidizable metal.
  • the heating element preferably comprises a mixture containing materials (1) to (4) above.
  • the heating element is configured as a sheet-like object.
  • a "sheet-like article” is a thin object having two surfaces facing each other, having a small thickness between the surfaces, and having flexibility and shape retention.
  • the sheet has a thickness of 0.6 mm or more, preferably 0.8 mm or more, more preferably 1.0 mm or more.
  • the thickness of the sheet material is 3.0 mm or less, preferably 2.8 mm or less, more preferably 2.0 mm or less.
  • the heating element constituting the heating tool is configured to have a function of reacting with oxygen in the air to generate heat, and accompanying this heat generation, steam heated to a predetermined temperature is generated from the heating element itself. is preferred.
  • the water contained in the heating element can become water vapor that partially evaporates as heat is generated due to the oxidation reaction of the oxidizable metal.
  • Examples of the form of the sheet-like heating element include forms (i) and (ii) shown below.
  • One form of the heat generating element includes (i) a form in which the heat generating element is a sheet-like article comprising a base sheet and a heat generating composition layer provided on one surface thereof.
  • the heat-generating composition is obtained by applying a paste containing oxidizable metal powder, carbon material powder, water and an electrolyte to one surface of the substrate sheet.
  • the form (i) of the heating element is also referred to as a "coating type".
  • the heating element contains oxidizable metal powder, carbon material powder, water and an electrolyte, preferably further contains a fiber material, and this mixture is formed into a sheet-like material.
  • a form that is a molded paper body is exemplified.
  • a heating element in this form is synonymous with an exothermic composition.
  • the form (ii) of the heating element is also referred to as a "papermaking type”.
  • the heating element may be used as it is in either form (i) or (ii).
  • the heating element of either form (i) or (ii) may be housed in an air-permeable wrapping material. It is also preferable that the packaging material does not allow the inflow and outflow of solids. When the heating element is accommodated in the packaging material, the packaging material is separate from the heating element. In other words, the packaging material does not constitute a heating element.
  • the shape of the packaging material is not particularly limited, but a flat one is preferred from the viewpoint of making it easier to form the heating tool thin and improving the handleability and fit.
  • the packaging material is formed in a flat shape, it is also preferable that at least one surface of the packaging material is made of a sheet material whose air permeability measured according to JIS P8117 is within a predetermined range.
  • one surface of the packaging material is composed of the first sheet material that satisfies the above-described predetermined air permeability.
  • the second sheet material which has lower air permeability than the first sheet material and does not satisfy the above-mentioned predetermined air permeability, is laminated so that the other surface of the packaging material is formed. . A description of the sheet material and air permeability will be given later.
  • FIGS. 1(a) and 1(b) One embodiment of the heating element described above is shown, for example, in FIGS. 1(a) and 1(b).
  • FIG. 1(a) is an example of a coating type heating element
  • FIG. 1(b) is an example of a papermaking type heating element.
  • each constituent member is a heating element 3, a heating composition 30, a base sheet 31, a powder of an oxidizable metal 3a, a powder of a carbon material 3b, an electrolyte 3c, and a fiber material 33. and wrapping material 35 .
  • FIGS. 1(a) is an example of a coating type heating element
  • FIG. 1(b) is an example of a papermaking type heating element.
  • each constituent member is a heating element 3, a heating composition 30, a base sheet 31, a powder of an oxidizable metal 3a, a powder of a carbon material 3b, an electrolyte 3c, and a fiber material 33. and wrapping material 35 .
  • the electrolyte 3c is illustrated as if it exists in the heating element 3 as a solid, but the present invention is not limited to this form. Specifically, the present disclosure also includes a mode in which the electrolyte 3c is partially or wholly dissolved in the water constituting the heating element, so that the electrolyte 3c cannot be visually recognized.
  • the content ratio of the oxidizable metal and water in the heating element constituting the heating tool is a predetermined content ratio.
  • the ratio of the content mass of the water to the content mass of the oxidizable metal powder contained in the heating element multiplied by 100 [100 ⁇ (water / oxidizable metal powder)] is preferably 95 or more, more preferably 98 or more, still more preferably 100 or more, and more preferably 105 or more.
  • the ratio of the content mass of the water to the content mass of the oxidizable metal powder contained in the heating element multiplied by 100 [100 ⁇ (water / oxidizable metal powder)] is preferably 130 or less, more preferably 125 or less, even more preferably 120 or less, and even more preferably 110 or less.
  • “the value obtained by multiplying the ratio of the contained mass of water to the contained mass of the oxidizable metal powder by 100” is "100 x (mass of water [g] / mass of oxidizable metal powder [g ])”.
  • the temperature characteristic due to heat generation is equal to or higher than that of the conventional heating device.
  • the manufacturing cost of the heating tool can be reduced.
  • “reduction of manufacturing cost” means that the content of oxidizable metal contained in the heating element can be reduced while improving the temperature characteristics due to heat generation to the same level or more as compared to conventional heating tools. .
  • Powders of oxidizable metals constituting the heating element include, for example, powders of iron, aluminum, zinc, manganese, magnesium and calcium. These can be used alone or in combination of two or more. Among these, it is preferable to use metallic iron from the viewpoint of handleability, safety, and manufacturing cost. That is, iron powder is preferably used. Examples of the iron powder include one or more selected from reduced iron powder and atomized iron powder.
  • the oxidizable metal powder constituting the heating element may be an aggregate of metal particles having no pores on the particle surface, or an aggregate of porous metal particles.
  • the powder of the carbon material that constitutes the heating element has a function of promoting an oxidation reaction. You can use what you have.
  • carbon materials include activated carbon such as coconut shell charcoal, charcoal powder, almanac coal, peat and lignite, carbon black, acetylene black, and graphite powder. These can be used alone or in combination of two or more. Among these, activated carbon powder is preferably used as the carbon material powder because it has a good balance of oxygen supply ability and catalytic ability.
  • the heating element preferably contains an electrolyte.
  • the electrolyte contained in the heating element includes, for example, one or more of salts of alkali metals or alkaline earth metals and phosphoric acid or sulfuric acid, or chlorides or hydroxides of alkali metals or alkaline earth metals. mentioned.
  • the electrolyte may be used as a solid such as powder, or as a liquid dissolved or dispersed in a liquid medium such as water.
  • the heating element contains sodium chloride as an electrolyte, and that the ratio of the content of water to sodium chloride is a predetermined ratio.
  • sodium chloride as an electrolyte and water at a predetermined content ratio, even if the content of the oxidizable metal is less than that of conventional heating tools, excellent heat generation equivalent to or higher than conventional heating tools is achieved. Temperature characteristics can be expressed. In addition to this, it is possible to reduce the manufacturing cost of the heating tool provided with the heating element.
  • the heating element in the present embodiment promotes oxidation of the oxidizable metal by sodium chloride for a long period of time even when the content of the oxidizable metal is reduced, and sustains heat generation due to the oxidation reaction for a long period of time. From the viewpoint of increasing 11.0 or more.
  • the ratio of the content of water to the content of sodium chloride is preferably 25.0 or less, more preferably 20.0 or less, even more preferably 18.0 or less, still more preferably 15.0 or less. With such a ratio, the oxidation reaction of the oxidizable metal can be sufficiently and continuously progressed, and the heating tool exhibits excellent temperature sustainability due to heat generation. In addition to this, the manufacturing cost of the heating tool can be reduced.
  • the heating element in the heating tool, preferably has a predetermined ratio of the mass of water contained to the mass of carbon material powder.
  • the heating element is carbon.
  • the ratio of the water content to the material powder content is preferably 6 or more, more preferably 10 or more, even more preferably 11 or more, and still more preferably 12 or more.
  • the content of water relative to the content mass of the carbon material powder contained in the heat generating body is preferably 30 or less, more preferably 20 or less, even more preferably 15 or less, and even more preferably 14 or less.
  • the pores of the carbon material provide an appropriate balance between the supply of water, which promotes the progress of the oxidation reaction of the oxidizable metal, and the supply of oxygen in the atmosphere. Therefore, the oxidation reaction of the oxidizable metal can be sufficiently and continuously progressed, and the heating tool 1 exhibits excellent temperature characteristics due to heat generation. In addition to this, the manufacturing cost of the heating tool can be reduced.
  • the heat generating composition in the application type or the heating element in the papermaking type has a predetermined ratio of the mass content of the constituent materials excluding water to the water. is preferred.
  • a predetermined ratio of the mass content of the constituent materials excluding water to the water is preferred.
  • the heat-generating composition of the application type or the heat-generating element of the paper-making type preferably has a ratio of the content mass of constituent materials other than water to the content mass of water (constituent materials other than water/water) of preferably 0.5. or more, more preferably 0.9 or more, and still more preferably 1.0 or more.
  • the ratio of the content mass of constituent materials other than water to the content mass of water (constituent materials other than water/water) is preferably 1.5 or less. It is more preferably 1.3 or less, still more preferably 1.2 or less.
  • the content ratio of the oxidizable metal and water the content ratio of sodium chloride and water, the content ratio of water and carbon material powder, and the content other than water
  • a water absorbent resin in or near the heat generating element. From the viewpoint of achieving both continuous generation of water vapor from the heating element and moderate progress of the oxidation reaction, and further improving production efficiency by preventing unintended dropping of the constituent materials, when further disposing the water-absorbent resin, It is more preferable that a wrapping material is further arranged and a layer containing the powder of the water-absorbing resin is arranged between the heat-generating composition and the wrapping material in the heating element.
  • a wrapping material is further arranged and a layer containing the powder of the water-absorbing resin is arranged between the heat-generating composition and the wrapping material in the heating element.
  • Excess moisture present in the heat generating element can be absorbed by further disposing the water absorbent resin in or near the heat generating element.
  • the oxidation reaction of the oxidizable metal can be efficiently progressed, the temperature characteristics and temperature durability due to heat generation can be improved, and the water retained in the water absorbent resin and the heat generating element can be maintained as water vapor. Since the heat can be emitted in a targeted manner, it is possible to give a comfortable warm feeling to the user of the heating tool.
  • the powder of the water-absorbing resin contains the oxidizable metal, carbon, etc. of the heat-generating composition in the heat-generating element.
  • the water-absorbing resin powder constitutes a part of the heating element.
  • the layer containing the water-absorbing resin powder is formed separately from the heating element.
  • An embodiment in which the layer containing the water-absorbing resin powder is present adjacent to the heating element includes, for example, (a) a single layer formed by sandwiching the water-absorbing resin powder between two moisture-permeable sheets.
  • a layer containing powder of the water-absorbent resin is arranged as a base sheet, and is present adjacent to the layer of the heat-generating composition in the heat-generating element.
  • the water-absorbing resin powder constitutes a part of the heating element.
  • the layer containing the powder of the water absorbent resin is preferably formed by sandwiching the water absorbent resin between two moisture-permeable sheets.
  • the heat-generating composition in the heat-generating element is arranged in contact with the outer surface of one of the moisture-permeable sheets.
  • the layer containing the powder of the water-absorbing resin is arranged as the base sheet
  • the layer containing the powder of the water-absorbing resin is housed in the packaging material together with the heating element from the viewpoint of preventing the constituent materials from falling off unintentionally.
  • the packaging material is provided
  • one surface of the packaging material is composed of a first sheet material having air permeability
  • the other surface is composed of a second sheet material having air permeability lower than that of the first sheet material. It is also preferable that they are formed by pasting together.
  • the wrapping material is preferably flat.
  • the layer containing the water-absorbing resin powder is arranged as a base sheet and includes a packaging material
  • the layer containing the water-absorbing resin powder and the first air-permeable sheet material in the packaging material are arranged to face each other. more preferably.
  • FIGS. 2(a) to (c) one mode in which the layer containing the powder of the water absorbent resin is present adjacent to the heat generating element is illustrated in FIGS. 2(a) to (c).
  • a layer 3L containing the powder of the water-absorbing resin 37 (hereinafter referred to as a water-absorbing Also referred to as a flexible resin layer 3L) is arranged.
  • the heating element 3, the water-absorbent resin layer 3L, and the packaging material 35 shown in FIGS. 2(a) to 2(c) are drawn so as to have different thicknesses as a whole, they are shown as such for convenience of explanation. 2(a) to 2(c), the actual thickness of the heating element 3, the water absorbent resin layer 3L and the packaging material 35 may be the same or different.
  • the water absorbent resin layer 3L is arranged, as shown in FIG. It is preferably formed by In this case, it is also preferable that the water-absorbent resin layer 3L is in contact with the heat-generating composition 30 constituting the heat-generating element 3 via the moisture-permeable sheet 38 . Specifically, it is preferable that the exothermic composition 30 constituting the exothermic body 3 is arranged between the base sheet 31 and the water absorbent resin layer 3L. With such a configuration, it is possible to continuously release water vapor while continuously exhibiting excellent temperature characteristics due to heat generation, so that more water vapor can be generated than conventional heating tools, so it is easy to use.
  • the structure of the water-absorbing resin layer is preferably applied to a heating tool in the form of an eye mask or a sticking form, so that the application site such as the user's eyes and their surroundings can continuously perceive a warm sensation. , is advantageous in that it can give comfort to the user.
  • the water absorbent resin layer 3L has a layered structure in which the water absorbent resin 37 is in contact with the heat generating composition 30 constituting the heat generating element 3 without interposing any other member. It is also preferable that the Specifically, it is preferable that the exothermic composition 30 constituting the exothermic body 3 is arranged between the base sheet 31 and the water absorbent resin layer 3L. With such a configuration, it is possible to generate more water vapor than conventional heating tools, so that the amount of water vapor generated can be further increased, and the heating target such as the eyes, nose, mouth, and throat can be heated. It has the advantage of being able to perceive both a comfortable feeling of warmth and moisture.
  • the structure of the water-absorbent resin layer is preferably applied to a heating tool in the form of a face mask, so that the user's mouth and nose and their surroundings can be widely perceived to be warm and moisturized. It is advantageous in that it can provide comfort.
  • the water-absorbing resin layer 3L includes the heat-generating composition 30 constituting the heat-generating element 3 and the water-absorbing resin 37 adjacent to each other without intervening other members. and a second water absorbent resin layer adjacent to the first water absorbent resin layer 3s and formed by sandwiching a water absorbent resin 37 between two moisture-permeable sheets 38, 38. It is preferably a laminated structure in which 3t is arranged. Specifically, it is preferable that the exothermic composition 30 constituting the exothermic body 3 is arranged between the base sheet 31 and the water absorbent resin layer 3L. In the embodiment shown in FIG.
  • the water absorbent resin layer 3L has a laminated structure in which the first water absorbent resin layer 3s and the second water absorbent resin layer 3t are arranged in contact with each other.
  • the exothermic reaction of the heating element can be efficiently advanced, and a large amount of water vapor can be generated in a relatively short time.
  • the body can be made to perceive warmth and moisture early.
  • a heating tool preferably in the form of a cup, it is possible to intensively provide warmth and moisture to the user's mouth and nose and their surroundings in a short period of time. It is advantageous in terms of
  • FIG. 3 illustrates another mode of existence of the heat generating element and the water absorbent resin, in which the layer containing the powder of the water absorbent resin is present adjacent to the heat generating composition in the heat generating element.
  • a water-absorbent resin layer 3L is arranged between the heat-generating composition 30 and the packaging material 35 in the heat-generating body 3.
  • the water absorbent resin layer 3L is preferably formed by sandwiching the water absorbent resin 37 between two moisture permeable sheets 38,38.
  • the heat-generating composition 30 in the heat-generating body 3 is preferably arranged in contact with one surface of the moisture-permeable sheet 38 .
  • the base sheet 31 of the heating element 3 is also preferable to use the water absorbent resin layer 3L.
  • the water-absorbing resin layer 3L is disposed as the base sheet 31 and includes a flat packaging material 35, the water-absorbing resin layer 3L and the first sheet material having air permeability in the packaging material are arranged so as to face each other.
  • the structure of the water-absorbing resin layer for example, is preferably applied to a heating tool in the form of an eye mask or a sticking form, so that the application site such as the user's eyes and their surroundings can continuously perceive a warm sensation. , is advantageous in that it can give comfort to the user.
  • the water-absorbent resin layer is arranged adjacent to the heating element, the water-absorbent resin layer is preferably configured as a sheet.
  • water absorbent resins include starch, crosslinked carboxymethylated cellulose, polymers or copolymers of acrylic acid or alkali metal acrylate salts, polyacrylic acid and its salts, and polyacrylic acid salt graft polymers. The above are mentioned.
  • a sodium salt can be used as a polyacrylic acid salt.
  • the shape of the water-absorbent resin includes particles having a spherical shape, a block shape, a grape cluster shape, a fibrous shape, or a combination thereof.
  • the water-absorbent resin is preferably powder composed of an aggregate of particles.
  • the moisture-permeable sheet for example, a thin paper, an absorbent paper, a fiber sheet such as a non-woven fabric, a mesh sheet, or the like can be used.
  • the moisture-permeable sheet preferably has air permeability.
  • the oxidizable metal powder preferably has an average particle size of 1 ⁇ m or more, more preferably 1 ⁇ m or more. is 10 ⁇ m or more. From the same point of view, the average particle diameter of the particles constituting the oxidizable metal powder is preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less.
  • the powder of the carbon material preferably has an average particle diameter of 1 ⁇ m or more, and further It is preferably 10 ⁇ m or more. From the same point of view, the average particle diameter of the particles constituting the carbon material powder is preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less.
  • the average particle size of the particles constituting the powder can be within the range normally used in this technical field.
  • the average particle size of each material described above is measured by a laser diffraction scattering method using, for example, a laser diffraction/scattering particle size distribution analyzer (manufactured by Horiba, Ltd. (model number: LA-950V2)). Median diameter (volume ).
  • Natural fiber materials include vegetable fibers (cotton, kabok, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soybean protein fiber, mannan fiber, rubber fiber, hemp, manila hemp, sisal hemp, New Zealand hemp, arabu hemp). , coconut, rush, straw, etc.), animal fiber (wool, goat hair, mohair, cashmere, alpaca, angora, camel, vicuna, silk, feather, down, feather, algin fiber, chitin fiber, casein fiber, etc.), mineral fiber (asbestos, etc.).
  • fiber materials can be used singly or in combination.
  • synthetic fiber materials include semi-synthetic fibers (acetate, triacetate, acetate oxide, Promix, chlorinated rubber, hydrochloride rubber, etc.), synthetic polymer fibers (nylon, aramid, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyester such as polyethylene terephthalate, polyacrylonitrile, acrylic, polyethylene, polyethylene, polypropylene, polystyrene, polyurethane, rayon, viscose rayon, cupra, etc.), metal fiber, carbon fiber, glass fiber and the like. These fiber materials can be used singly or in combination.
  • fiber materials are selected from among wood pulp, cotton and polyester. It is preferable to use at least one kind.
  • the fiber material preferably has an average fiber length of 0.5 mm or more, more preferably 2 mm or more.
  • the fiber material preferably has an average fiber length of 10 mm or less, more preferably 5 mm or less.
  • the average fiber length of a fiber material is the fiber length when 50 or more fiber materials are measured, one end of each fiber is fixed to a horizontal plate, and the fiber is suspended under its own weight. , measured using a clamping ruler or clamped on a microscope slide and measured using a microscope, and taken as the arithmetic mean of the measurements obtained.
  • the heating element may be composed only of oxidizable metal powder, carbon material powder, water, electrolyte, and, if necessary, fiber material. , an oxidizable metal powder, a carbon material powder, and other powders than the electrolyte may be included in the heat generating composition. Other powders include, for example, the above-described water absorbent resin.
  • the content ratio of the other powders in the heating element is preferably 20, expressed as a total mass ratio with respect to all the powders constituting the heating element, from the viewpoint of further improving the temperature characteristics, temperature sustainability, and amount of water vapor generated by heat generation. % by mass or less, more preferably 10% by mass or less.
  • the total mass ratio of the oxidizable metal powder and the carbon material powder to the total powder constituting the heating element is preferably 80% by mass from the viewpoint of further improving temperature characteristics, temperature sustainability, and steam generation due to heat generation. or more, more preferably 90% by mass or more.
  • the mass is based on the absolute dry mass.
  • the heating element does not contain any porous material other than oxidizable metal powder, carbon material powder, water and electrolyte, and optionally fiber material.
  • porous materials include silicon-containing inorganic compounds such as zeolite, silica, diatomaceous earth, vermiculite, perlite, and calcium silicate.
  • the heating tool having the above configuration can promote the oxidation reaction of the oxidizable metal by appropriately setting at least one of the above-described content ratios of the materials in the heating element, and as a result, the temperature It is possible to obtain a heating tool that has a high integrated sensible heat amount represented by the integral of heat generation duration and excellent temperature characteristics and temperature durability due to heat generation. In addition, even if the content of oxidizable metal is lower than that of conventional heating tools, it is possible to exhibit excellent temperature characteristics and excellent temperature sustainability due to heat generation. It is possible to manufacture a heating tool having temperature characteristics and temperature sustainability by suppressing costs. In addition to this, the heating tool is excellent in the amount of water vapor generated from the heating element.
  • the heating tool preferably includes a main body and a heating element provided on the main body. It is also preferable that the main body has a shape that covers the object to be heated when in use. It is preferable that the heating tool includes a top sheet positioned closer to the object to be heated and a back sheet positioned farther from the object to be heated. Specifically, the heating tool preferably includes a top sheet located closer to the user's skin and a back sheet located farther from the user's skin. It is preferable that the main body of the heating tool is composed of the top sheet and the back sheet. It is preferable that the heating element is held between the top sheet and the back sheet that constitute the main body. It is also preferred that the heating element is held between the topsheet and the backsheet while being housed in an air-permeable wrapping material.
  • the breathable first sheet material is arranged on the side closer to the object to be heated, more specifically, on the side closer to the user's skin. preferably. In other words, it is preferable that the first sheet member is arranged so as to face the top sheet.
  • the packaging material is formed of the first sheet material and the second sheet material
  • the second sheet material which has lower air permeability than the first sheet material, is positioned farther from the object to be heated, more specifically, from the user's skin. It is preferably arranged on the far side. That is, it is preferable that the second sheet member is arranged so as to face the back sheet.
  • the heating tool generates steam heated to a predetermined temperature from a heating element. As a result, heat can be applied to the object to be heated and its surroundings.
  • FIG. 4 to 7 show a heating tool in the form of a so-called eye mask as one embodiment of the heating tool.
  • the present disclosure encompasses the use of a heating device as an eye mask, as well as methods of using the heating device as an eye mask.
  • the components different from the above-described embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted. The description of each configuration described above is appropriately applied to components that are not particularly described in this embodiment.
  • the heating tool of this embodiment is configured to be held around the eye. This heating tool is used to apply heat to the eyes and their surroundings by bringing the heating tool into contact so as to cover both eyes of a person to be heated.
  • the heating tool is designed to generate water vapor heated to a predetermined temperature, thereby applying heat to the eye, which is the object to be heated, and its surroundings.
  • the heating tool of the present embodiment preferably includes a horizontally elongated main body shaped to cover the user's eyes when in use, and a heating element provided in the main body. Moreover, it is preferable that the heating tool of the present embodiment includes a pair of ear hooks attached to the main body. The ear hooks keep the user's eyes covered.
  • the direction corresponding to the longitudinal direction of the heating tool is also called the horizontal direction
  • the direction orthogonal to the horizontal direction is also called the vertical direction.
  • the heating tool in this embodiment is illustrated as a heating tool 1, a main body 2, a heating element 3, a horizontal direction X and a vertical direction Y in FIG.
  • the heating tool 1 shown in FIG. 4 is provided with ear hooks 4 on both outer end regions in the horizontal direction X of the main body 2, and can be turned outward in the horizontal direction X.
  • the user's ears can be covered with the ear hooks 4, 4, respectively, so that the user's eyes can be kept covered by the main body 2.
  • the sheet material forming the ear hook portion 4 is a stretchable sheet.
  • FIG. 5 shows an exploded perspective view of the heating tool 1 of this embodiment.
  • FIG. 6 shows a cross-sectional view along the horizontal direction X of the heating tool 1.
  • the body portion 2 of the heating tool 1 shown in FIGS. 5 and 6 is flat and includes a top sheet 5 positioned closer to the user's skin and a back sheet 6 positioned farther from the user's skin. belongs to.
  • the surface sheet 5 constitutes a surface that includes a portion that comes into contact with an object to be heated, such as a person's eyes, mouth, or nose, when the heating tool 1 is used.
  • the back sheet 6 is the side far from the user's skin and forms the outer surface of the heating tool 1 . That is, in FIGS. 5 and 6, the upper side of the paper surface is the side closer to the user's skin, and the lower side of the paper surface is the side farther from the user's skin.
  • top sheet 5 and the back sheet 6 shown in FIGS. 5 and 6 are joined to each other with an adhesive 7 such as a hot-melt adhesive in a state of being superimposed on each other.
  • Two heating elements 3, 3 are accommodated in the lateral direction X spaced apart from each other. That is, in this embodiment, the heating element 3 is configured so as not to be detachable from the main body 2 . It is preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 .
  • the topsheet 5 and the backsheet 6 at least the topsheet 5 is preferably made of a breathable fiber sheet.
  • a fiber sheet is an assembly of constituent fibers formed into a sheet shape by at least one of entanglement, fusion and adhesion. A detailed description of each seat 5, 6 will be given later.
  • the sectional view shown in FIG. 6 shows the fixed state of the heating element 3 .
  • the heating element 3 is preferably formed by laminating a plurality of sheet materials by heat sealing or the like, and is housed in a packaging material 35 having air permeability. In this case, it is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 while being accommodated in the air-permeable wrapping material 35 .
  • the wrapping material 35 is preferably flat.
  • the packaging material 35 is laminated such that one surface is composed of the first sheet material having air permeability and the other surface is composed of the second sheet material having lower air permeability than the first sheet material. It is also preferred that the When the packaging material 35 is formed of the first sheet material and the second sheet material, it is preferable that the first sheet material having air permeability be arranged on the side closer to the user's skin. In other words, it is preferable that the first sheet member is arranged so as to face the topsheet 5 .
  • the packaging material 35 is formed of the first sheet material and the second sheet material, the second sheet material having lower air permeability than the first sheet material may be arranged on the far side from the user's skin. preferable. In other words, it is preferable that the second sheet member is arranged so as to face the backsheet 6 .
  • FIG. 6 illustrates a first sheet material 351 and a second sheet material 352 as sheet materials forming the packaging material 35 .
  • the heating implement 1 When the heating implement 1 includes the wrapping material 35, as shown in FIG. It is preferably fixed by the adhesive fixing portions 7a, 7a and the other surfaces are not fixed to the backsheet 6. As shown in FIG. Each of the adhesive fixing portions 7a, 7a in the embodiment shown in FIG. With such a configuration, when the heating tool 1 is used, the heating element 3 can be arranged with high fit to the object to be heated, and heat can be efficiently applied to the object to be heated.
  • the ear hooking portion 4 is made of a sheet material, and an insertion portion 4A extending in the lateral direction X is formed in the sheet material.
  • the insertion portion 4A is a hole through which the ear is passed when the ear hook portion 4 is hung on the ear.
  • the insertion portion 4A may be formed by a through slit or the like through which the ear can be passed.
  • the ear hooks 4 are joined to the outer surface of the topsheet 5 of the main body 2 at both outer end regions in the lateral direction X, thereby connecting the main body 2 and the ear hooks.
  • a joint region 9 is formed to which the portion 4 is joined.
  • the joint region 9 also functions as a bent portion when the ear hooking portion 4 is turned upside down with the joint end portion 9s as an axis.
  • FIG. 7 is a cross-sectional view showing the form of the joint region 9 in the heating tool 1 of this embodiment.
  • the joint region 9 between the main body portion 2 and the ear hook portion 4 shown in FIGS. It is preferable that the joints are continuously joined up to and have a substantially semi-elliptical shape. As shown in FIG. 7, it is preferable that the joint region 9 is formed by joining the surface sheet 5 of the body portion 2 and the ear hook portion 4 . It is preferable that the joint region 9 also function as a bending portion when the ear hooking portion 4 is turned upside down with the joint end portion 9s as an axis.
  • the joint regions 9 shown in FIGS. 5 and 7 are formed by continuous joints, they may be formed by intermittent joints instead of this.
  • the heating tool 1 in the form of an eye mask shown in FIGS. 4 to 7 can be used by holding the heating tool 1 on the ear using the ear hook 4 as shown in FIG. 8, for example. can be done.
  • By adopting such a usage pattern it is possible to uniformly apply the steam and heat generated from the heating tool 1 to the user's eyes and their surroundings regardless of the user's posture (for example, supine position, sitting position, etc.). can. This is advantageous in that the versatility of usage patterns of the heating tool 1 is improved.
  • FIG. 9 shows a heating tool having a so-called sticking configuration as an embodiment of the heating tool.
  • the present disclosure encompasses the use of a heating device as a patch form, as well as methods of using a heating device as a patch form.
  • the components different from the above-described embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted.
  • the description of each configuration described above is appropriately applied to components that are not particularly described in this embodiment.
  • FIG. 9 shows an embodiment when the heating tool 1 is in a sticking form.
  • the heating implement 1 of this embodiment includes a main body portion 2 having a top sheet 5 that forms a skin-facing surface when in use and a back sheet 6 that forms a non-skin facing surface when in use; and a heating element 3 are preferably provided. It is preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 . It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 while being accommodated in the air-permeable wrapping material 35 .
  • the surface sheet 5 constituting the skin-facing surface is provided with an adhesive portion 51 on a part of or the entire outer surface thereof.
  • the adhesive part 51 is for holding the heating tool 1 at a part to which heat and steam generated from the heating tool 1 are applied.
  • the heating tool 1 can be directly attached to the user's skin or attached to the user's clothes for use, and the heating tool 1 can be easily held at a predetermined site to be heated.
  • a substrate such as a film that covers the adhesive portion may be provided in order to allow the adhesive portion to develop adhesiveness at a desired timing.
  • FIG. 10 shows a heating tool in the form of a so-called face mask as an embodiment of the heating tool.
  • the present disclosure encompasses the use of heating devices as face masks, as well as methods of using heating devices as face masks.
  • the components different from those of the above-described embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and the description thereof will be omitted.
  • the description of each configuration described above is appropriately applied to components that are not particularly described in this embodiment.
  • FIG. 10 shows an embodiment when the heating tool 1 is in the form of a face mask.
  • the heating tool 1 of this embodiment preferably includes a main body 2 that covers at least one of the mouth and nose of the user during use, and a heating element 3 provided in the main body 2 .
  • the heating tool 1 of the present embodiment preferably has a pair of ear hooks 4 provided on both left and right ends of the main body 2 . At least one of the user's mouth and nose can be kept covered by the ear hook.
  • the ear hook portion 4 in this embodiment is made of a sheet material.
  • An insertion portion 4A is preferably formed in the central region of the ear hook portion 4. As shown in FIG.
  • the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 . It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 while being accommodated in the air-permeable wrapping material 35 .
  • the heating tool 1 of this embodiment preferably has a folding line 15 at a position corresponding to the bridge of the user's nose.
  • the folding line 15 in this embodiment is provided in the lateral central region of the body portion 2 of the heating tool 1 .
  • the folding line 15 is used as a flexible axis, and the surface sheet 5 is brought into close contact along the convex shape of the nose. Therefore, a gap between the heating tool 1 and the object to be heated is less likely to occur, and the heating and humidifying effect can be enhanced.
  • the flat heating tool 1 without the folding line 15 may be used depending on the application.
  • the heating tool 1 of the present embodiment can be used by holding the heating tool 1 on the ear using the ear hook 4 .
  • FIG. 11 shows a so-called cup-shaped heating tool as an embodiment of the heating tool.
  • the present disclosure encompasses the use of a heating device in the form of a cup, as well as methods of using the heating device in the form of a cup.
  • the components different from those of the above-described embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and the description thereof will be omitted.
  • the description of each configuration described above is appropriately applied to components that are not particularly described in this embodiment.
  • FIG. 11 shows an embodiment when the heating implement 1 is in the form of a cup.
  • the heating tool 1 of this embodiment preferably includes a main body 2 that covers at least one of the mouth and nose of the user during use, and a heating element 3 provided in the main body 2 .
  • the heating tool 1 of the present embodiment may be provided with ear hooks capable of keeping at least one of the user's mouth and nose covered, or may not be provided with ear hooks. good too.
  • the heating implement 1 of this embodiment includes a main body portion 2 in which a first panel portion 21 and a second panel portion 22 having substantially the same shape as the first panel portion 21 are continuously formed. It is preferable to have In this embodiment, both the panel portions 21 and 22 are formed in a sector shape, and it is preferable that the tapered portions of the both panel portions 21 and 22 are configured to be continuous. Both the first panel portion 21 and the second panel portion 22 are composed of a continuous topsheet 5 and a continuous backsheet 6, and the heating element 3 is held between the topsheet 5 and the backsheet 6. It is preferable that It is also preferable that the heating element 3 is held between the top sheet 5 and the back sheet 6 that constitute the main body 2 while being accommodated in the air-permeable wrapping material 35 .
  • the heating tool 1 of this embodiment preferably has a boundary line D that serves as a flexible axis for bending the main body 2 at a continuous portion between the first panel portion 21 and the second panel portion 22 .
  • the first panel section 21 and the second panel section 22 have a line-symmetrical shape with the boundary line D as an axis.
  • the heating implement 1 of the present embodiment is folded about the boundary line D so that the topsheet 5 faces each other, and the first side edge 21A of the first panel portion 21 and the first side of the second panel portion 22 are folded.
  • the edge 22A, the second side edge 21B of the first panel portion 21, and the second side edge 22B of the second panel portion 22 are overlapped and joined.
  • the third side edge 21C of the first panel portion 21 and the third side edge 22C of the second panel portion 22, which are positioned outward, are not joined together, and form an opening in the cup shape.
  • This opening is preferably open enough to cover the user's nose and mouth.
  • a cylindrical cup-shaped heating implement with a bottom having a bottom at the boundary line D and a position in the vicinity thereof is formed.
  • This cup-shaped heating tool has an outer surface formed by a back sheet 6 and an inner surface formed by a top sheet 5 .
  • the cup-shaped heating tool of this embodiment does not have an ear hook.
  • the main body of the bottomed cylindrical cup-shaped heating implement has a dimension that allows it to be manually gripped.
  • the main body of the cup-shaped heating tool is configured to be manually grippable.
  • the cup-shaped heating tool can be used, for example, by manually gripping the main body and holding the opening of the cup-shaped heating tool near the user's nose and mouth.
  • the heating tool is It is preferable that the heating implement is manufactured, stored and distributed in the form of a package of the heating implement that is hermetically housed in a packaging bag such as an oxygen-blocking bag.
  • a packaging bag such as an oxygen-blocking bag.
  • a package it may be an individual package in which one heating implement is accommodated in one packaging bag, or, if necessary, a package in which a plurality of heating implements are accommodated in one packaging bag. It can be.
  • Various sheet materials that can be used for the ear hook portion, the top sheet, the back sheet, the base sheet, the packaging material, and the moisture-permeable sheet each independently have their breathability, moisture permeability, texture, stretchability, strength, and It may be appropriately determined in consideration of properties such as leakage prevention of constituent materials of the exothermic composition.
  • the sheet material for example, a nonwoven fabric, a woven fabric, a fiber sheet such as paper, a resin foam sheet, a metal sheet, or a combination of these is used.
  • the sheet material may have a single structure consisting of only one sheet material, regardless of whether it is a single layer or multiple layers, or may have a laminated structure in which two or more types of sheet materials are laminated.
  • a meltblown nonwoven fabric is preferably used as the sheet material having high air permeability and moisture permeability.
  • an air-through nonwoven fabric or a thermal bond nonwoven fabric is preferably used.
  • an air-through nonwoven fabric containing synthetic fibers such as polyester such as polyethylene terephthalate, polyethylene, or polypropylene, a spunbonded nonwoven fabric, a thermal bonded nonwoven fabric, or the like is used.
  • a spunbonded nonwoven fabric, a spunlaced nonwoven fabric, a needle-punched nonwoven fabric, a chemically bonded nonwoven fabric, or the like is preferably used as the sheet material used for the purpose of imparting strength.
  • a nonwoven fabric surface-treated with silicone, a surfactant, or the like, or a foam sheet made from a thermoplastic resin such as polyethylene or polyurethane may be used.
  • these sheet materials may be used by mixing a plurality of fibers having different fiber raw materials, fiber diameters, degrees of crimping of fibers, etc., or by combining a plurality of sheet materials to express desired properties.
  • the ear hooks, the top sheet and the back sheet, the base sheet, the packaging material and the moisture-permeable sheet may each independently have a single structure consisting of only one sheet material regardless of whether it is a single layer or a multi-layer. Alternatively, it may have a laminated structure in which two or more types of sheet materials are superimposed.
  • a fiber sheet is preferably used as the surface sheet as described above. At least one of needle-punched nonwoven fabrics, air-through nonwoven fabrics, spunbonded nonwoven fabrics, and chemical-bonded nonwoven fabrics can be preferably used from the viewpoint of increasing the production efficiency of heating tools.
  • both the top sheet and the back sheet preferably have air permeability.
  • the term "having air permeability” means that the air permeability measured according to JIS P8117:2009 is 10000 seconds/100 mL or less. Air permeability measured according to JIS P8117 is defined as the time required for 100 mL of air to pass through an area of 6.42 cm 2 under normal temperature and pressure.
  • the air permeability of the top sheet and the back sheet are each independently preferably 0.01 sec/100 mL or more, more preferably 0.03 sec/100 mL or more.
  • Air permeability is measured according to JIS P8117:2009.
  • a low air permeability means that air does not take much time to pass through, and therefore high air permeability.
  • the sheet material constituting one surface of the packaging material should conform to JIS P8117 from the viewpoint of appropriately releasing hot steam to the outside and effectively applying heat to the object to be heated.
  • Air permeability measured by regulation is preferably greater than 0 sec/100 mL, more preferably 10 sec/100 mL or more, still more preferably 20 sec/100 mL or more, and even more preferably 30 sec/100 mL or more.
  • the sheet material constituting one side of the packaging material preferably has an air permeability of 5000 seconds/100 mL or less as measured according to JIS P8117. , more preferably 3000 seconds/100 mL or less, still more preferably 1500 seconds/100 mL or less, and even more preferably 100 seconds/100 mL or less.
  • a breathable wrapping material 35 if a breathable wrapping material 35 is provided, and the wrapping material has a first sheet material 351 that is breathable and a second sheet material 352 that is less breathable than the first sheet material,
  • the air permeability of the first sheet material 351 preferably satisfies the above range.
  • the air permeability of the second sheet material 352 is preferably 10000 seconds/100 mL or more, more preferably 25000 seconds/100 mL or more, exhibits sufficient and moderate temperature sustainability due to heat generation, and heats water vapor. From the viewpoint of sufficient application to the subject, it is more preferable to be non-ventilating. "Non-aerated" means that the air permeability measured according to JIS P8117:2009 is 80000 seconds/100 mL or more.
  • the above-described first sheet material having air permeability is, for example, a resin film having a plurality of through holes, or a sheet obtained from a resin composition containing polyethylene and a filler such as calcium carbonate.
  • a film obtained by biaxial stretching can be used.
  • the air permeability can be appropriately changed by adjusting the degree of stretching.
  • Sheets applicable for the first sheet material are disclosed, for example, in EP 1939240 A1.
  • a resin film or the like having fewer through holes than the first sheet material or having no through holes can be used as the second sheet material having air permeability described above.
  • a first sheet measured according to JIS Z0208 when provided with an air-permeable wrapping material and the wrapping material has a first sheet material with air permeability and a second sheet material with lower air permeability than the first sheet material
  • the moisture permeability of the material is preferably 480 g/(m 2 ⁇ 24 h) or more, more preferably 720 g/(m 2 ⁇ 24 h) or more, still more preferably 960 g/(m 2 ⁇ 24 h) or more.
  • the moisture permeability of the first sheet material measured according to JIS Z0208 is preferably 5000 g/(m 2 ⁇ 24 h) or less, more preferably 4750 g/(m 2 ⁇ 24 h) or less, still more preferably 4500 g/(m 2 24h) or less.
  • the moisture permeability of the second sheet material measured according to JIS Z0208 is preferably 480 g/(m 2 ⁇ 24 h) or less, more preferably 240 g/(m 2 ⁇ 24 h) or less, still more preferably 0 g/(m 2 ⁇ 24h).
  • each of the first sheet material and the second sheet material By setting the moisture permeability of each of the first sheet material and the second sheet material independently to the range described above, sufficient and appropriate temperature characteristics and temperature sustainability due to heat generation are exhibited, and water vapor is sufficiently applied to the object to be heated. can be granted.
  • the same sheet material as described in the above air permeability can be used.
  • the basis weight of the topsheet is preferably 10 g/m 2 or more, more preferably 30 g/m 2 or more, and even more preferably 50 g/m 2 or more.
  • the basis weight of the topsheet is preferably 200 g/m 2 or less, more preferably 130 g/m 2 or less, and even more preferably 100 g/m 2 or more.
  • the basis weight of the backsheet is preferably smaller than that of the topsheet from the viewpoints of improving heat retention and printing performance.
  • the basis weight of the backsheet is preferably 10 g/m 2 or more, more preferably 20 g/m 2 or more.
  • the basis weight of the backsheet is preferably 100 g/m 2 or less, more preferably 80 g/m 2 or less.
  • the basis weight of the entire sheet may be within the above range.
  • the “moisture permeability” of the moisture-permeable sheet means that the moisture permeability of the sheet measured according to JIS Z0208 is 2000 g/(m 2 ⁇ 24 h) or more.
  • the moisture-permeable sheet preferably has a moisture-permeability of 2000 g/(m 2 ⁇ 24 h) or more, more preferably 2500 g/(m 2 ⁇ 24 h) or more, still more preferably It is 3000 g/(m 2 ⁇ 24 h) or more.
  • the moisture-permeable sheet described above can be suitably used as the moisture-permeable sheet in the water absorbent resin layer. When a plurality of moisture-permeable sheets are used, the moisture-permeable values of the respective moisture-permeable sheets may be the same or different.
  • the amount of water vapor generated (mg/10 min) from the time when the heating tool starts generating heat until 10 minutes (10 minutes) is preferably 70 mg/10 min or more, more preferably 130 mg/10 min. It is 10 min or more, more preferably 180 mg/10 min or more, still more preferably 185 mg/10 min or more, still more preferably 190 mg/10 min or more, and 300 mg/10 min or less is realistic. With such a configuration, the amount of water vapor generated is high. It is possible to make the outside of the mouth and the surrounding area perceive both a comfortable warm feeling and moisture.
  • Such a water vapor generation amount can be obtained, for example, by setting the content ratio of each constituent material of the above-described heating element to an appropriate ratio, or by using the water absorbent resin 37 in the configuration as shown in FIG. It can be easily achieved by adopting the arranged configuration.
  • the amount of water vapor generated is measured using an apparatus 100 having the configuration shown in FIG.
  • the apparatus 100 comprises an aluminum measuring chamber 101 (4.2 L volume), an inflow channel 102 communicating with the lower part of the measuring chamber 101, and an outflow channel 103 communicating with the upper part of the measuring chamber 101.
  • the inflow path 102 allows dehumidified air (humidity less than 2% RH, flow rate 2.1 L/min) supplied from an air supply unit (not shown) to flow into the measurement chamber 101 .
  • the apparatus 100 includes an inlet thermo-hygrometer 104 and an inlet flow meter 105 provided in the inflow path 102, an outlet thermo-hygrometer 106 and an outlet flow meter 107 provided in the outflow path 103, and A thermometer (thermistor) 108 is provided.
  • thermometer 108 one having a temperature resolution of about 0.01° C. is preferably used.
  • a method for measuring the amount of generated water vapor using the device 100 is as follows. First, the oxygen-blocking bag is opened, and one heating element is taken out of the heating device to be measured, which is hermetically housed in the oxygen-blocking bag. When the heating element is housed in the packaging material, it is taken out in the state of the heating element housed in the packaging material. The heating element taken out is placed in the measurement chamber 101 so that one surface of the packaging material faces the outer surface, and the thermometer 108 is placed thereon. When one side and the other side of the packaging material are composed of sheets with different air permeability, measure so that the surface of the packaging material with high air permeability (preferably the first sheet material) faces the outside.
  • thermometer 108 It is placed in the chamber 101 and a thermometer 108 is placed on the surface.
  • dehumidified air flows from the lower part of the measurement chamber 101 through the inflow path 102, and from each temperature and each humidity measured by the inlet thermo-hygrometer 104 and the outlet thermo-hygrometer 106, Find the absolute humidity difference between Further, from the air flow rate measured by the inlet flow meter 105 and the outlet flow meter 107, the amount of water vapor released from the heating tool is calculated.
  • the amount of water vapor generated is the total amount measured over a predetermined period of time from the time when the heating device is taken out of the oxygen-blocking bag and the heating element is brought into contact with air as the start point of measurement.
  • the predetermined time can be, for example, 10 minutes, but is not limited to these times and can be set as appropriate.
  • the heating device has a duration of temperature of 38°C or higher (hereinafter also referred to as a duration of 38°C or higher) of preferably 5 minutes or longer, more preferably 15 minutes or longer, and still more preferably 20 minutes or longer. is 30 minutes or less, more preferably 28 minutes or less, still more preferably 27 minutes or less.
  • a duration of 38°C or higher preferably 5 minutes or longer, more preferably 15 minutes or longer, and still more preferably 20 minutes or longer. is 30 minutes or less, more preferably 28 minutes or less, still more preferably 27 minutes or less.
  • the duration of 38° C. or higher can be measured by the following method, for example, under an environment of room temperature of 20° C. and humidity of 50% RH.
  • the oxygen-blocking bag is opened and the heating device is taken out of the heating tool to be measured, which is hermetically housed in the oxygen-blocking bag.
  • the measuring surface of the temperature sensor of a data collection type thermometer (LT-8, manufactured by Gram) is fixed to the object to be heated with tape.
  • the heating tool is in the form of an eye mask or an adhesive form, and is configured to make surface contact with the heating target during use, the contact surface of the heating target with the heating tool (for example, the heating tool of the eye mask) It is attached to the wearer's upper eyelid, if any, and secured with tape.
  • the heating tool has a shape such as a face mask or a cup shape, and has a configuration that has a space between the object to be heated and a space during use, the target part of the heating tool (for example, the heating of the face mask) If it is a device, it is attached to the wearer's mouth) and fixed with tape. The temperature is measured over time with the thermometer measuring device connected to the temperature sensor.
  • the temperature is measured at intervals of 10 seconds from the start of heat generation, and the measurement is performed for a total of 60 minutes. From the exothermic profile plotted with the measured temperature (° C.) on the vertical axis and the measured time (seconds) on the horizontal axis, the length of time during which the temperature of 38° C. or higher is measured is defined as the holding time of 38° C. or higher. Also, when measuring and calculating the maximum temperature reached by the heating tool, the maximum temperature measured from the heat generation profile is taken as the maximum temperature reached.
  • the shape of the ear hooks is not limited to the sheet-like member shown in FIGS. 4 and 5 as long as the main body can be fixed to both eyes of the user.
  • the ear hooks made of sheet material instead of the ear hooks made of string-like members, or ear hooks made of thread-like or belt-like members may be used. From the viewpoint of improving the fitting feeling of the heating tool, it is preferable to use an elastic material such as rubber to make the ear hook part 4 stretchable.
  • the form of the heating element is not particularly limited as long as it can impart a feeling.
  • one heating element having a shape and size capable of covering the object to be heated and its surroundings may be held between the top sheet and the back sheet, and three or more heating elements may be held between the top sheet and the back sheet. It may be held between sheets.
  • the heating element shown in FIGS. 5 and 6 is only partially fixed in the central region in the horizontal direction of the heating tool, the present invention is not limited to this form.
  • the heat generating element and the backsheet may be joined continuously or intermittently with an adhesive in the transverse central region and regions other than the central region. They may be joined by applying an adhesive over the entire surface.
  • the following heating tool is further disclosed.
  • a heating element containing oxidizable metal powder, carbon material powder, water and electrolyte The heating element is a sheet-like object, In the heating element, the ratio of the water content mass to the oxidizable metal powder content mass multiplied by 100 [100 x (water/oxidizable metal powder)] is 95 or more and 130 or less. can be,
  • the heating element is a heating tool, wherein the ratio of the content mass of the water to the content mass of the powder of the carbon material is 6 or more and 30 or less.
  • the value [100 x (water/oxidizable metal powder)] is more preferably 98 or more, still more preferably 100 or more, and even more preferably 105 or more,
  • the heating implement according to ⁇ 1> above which is more preferably 125 or less, still more preferably 120 or less, and even more preferably 110 or less.
  • ⁇ 3> containing sodium chloride as the electrolyte,
  • the ratio of the water content to the sodium chloride content is preferably 5.0 or more, more preferably 10.0 or more, and still more preferably 11.0 or more,
  • the ratio of the content mass of the water to the content mass of the carbon material powder is more preferably 10 or more, still more preferably 11 or more, and still more preferably 12 or more, The heating tool according to any one of ⁇ 1> to ⁇ 4>, more preferably 20 or less, still more preferably 15 or less, still more preferably 14 or less.
  • the heating element has the following structure (i) or (ii), (i) a substrate sheet and a heat-generating composition layer provided on one surface thereof, the layer being obtained from a paste containing the oxidizable metal powder, the carbon material powder, the water, and the electrolyte; It is something that can be done. (ii) A paper body containing the oxidizable metal powder, the carbon material powder, the water, the electrolyte, and a fiber material.
  • the ratio of the content mass of constituent materials other than water to the content mass of water (constituent materials other than water/water) is preferably 0.5.
  • the heating tool according to any one of ⁇ 1> to ⁇ 5>, which is preferably 1.5 or less, more preferably 1.3 or less, and still more preferably 1.2 or less.
  • the heating element is housed in a flat packaging material, Any one of the above ⁇ 1> to ⁇ 6>, wherein one surface of the packaging material is made of a sheet material having an air permeability of 0 sec/100 mL or more and 5000 sec/100 mL or less as measured according to JIS P8117.
  • the heating tool according to 1.
  • the sheet material preferably has an air permeability measured according to JIS P8117 of 10 seconds/100 mL or more, still more preferably 20 seconds/100 mL or more, and still more preferably 30 seconds/100 mL or more.
  • the heating tool according to ⁇ 7> above which is more preferably 3000 seconds/100 mL or less, still more preferably 1500 seconds/100 mL or less, and still more preferably 100 seconds/100 mL or less.
  • the other surface of the packaging material is composed of a second sheet material
  • the air permeability of the second sheet material measured according to JIS P8117 is preferably 10000 seconds/100 mL or more, more preferably 25000 seconds/100 mL or more, and 80000 seconds/100 mL or more.
  • the heating tool according to any one of ⁇ 7> to ⁇ 9>, wherein a layer containing water-absorbent resin powder is disposed between the heating element and the packaging material.
  • the heat generating element comprises a base sheet and a heat generating composition layer provided on one surface thereof, The heat-generating composition layer is obtained from a paste containing the oxidizable metal powder, the carbon material powder, water and an electrolyte,
  • the heating tool according to any one of ⁇ 1> to ⁇ 10>, further comprising a layer containing a water-absorbent resin powder adjacent to the layer of the heat-generating composition.
  • ⁇ 12> The heating tool according to ⁇ 10> or ⁇ 11> above, wherein the layer containing the water-absorbing resin powder is formed by sandwiching the water-absorbing resin between two moisture-permeable sheets.
  • Each of the moisture-permeable sheets independently has a weight of preferably 2000 g/(m 2 ⁇ 24 h) or more, more preferably 2500 g/(m 2 ⁇ 24 h) or more, and still more preferably 3000 g/(m 2 ⁇ 24 h) or more.
  • the heating tool according to ⁇ 12> has a weight of preferably 2000 g/(m 2 ⁇ 24 h) or more, more preferably 2500 g/(m 2 ⁇ 24 h) or more, and still more preferably 3000 g/(m 2 ⁇ 24 h) or more.
  • ⁇ 14> The heating tool according to any one of ⁇ 1> to ⁇ 13> above, wherein steam is generated from the heating element itself as heat is generated.
  • ⁇ 15> The heating tool according to ⁇ 14> above, wherein the amount of steam generated in 10 minutes from the start of heat generation is 70 mg/10 min or more.
  • the water vapor generation amount is preferably 130 mg/10 min or more, more preferably 180 mg/10 min or more, still more preferably 185 mg/10 min or more, still more preferably 190 mg/10 min or more, The heating tool according to ⁇ 15> above, which is 300 mg/10 min or less.
  • ⁇ 17> The heating tool according to any one of ⁇ 1> to ⁇ 16>, wherein the duration of the temperature of 38° C.
  • Examples 1 to 9 and Comparative Example 1 ⁇ Preparation of paint> Iron powder (RKH3, manufactured by DOWA IP Creation Co., Ltd., average particle size: 45 ⁇ m) as the oxidizable metal powder, and activated carbon powder (manufactured by Osaka Gas Chemicals Co., Ltd., carboraffin, average particle size: 31 ⁇ m) as the carbon material powder. ), water, an electrolyte, and a thickener in the proportions shown in Table 1 below to obtain a heat-generating composition paste having a viscosity of 5000 mPa ⁇ s at 25° C. as measured by a Brookfield viscometer.
  • ⁇ Preparation of heating element> particles of a water-absorbent resin (Aqualic (registered trademark) CA, manufactured by Nippon Shokubai Co., Ltd.) are placed on paper made of wood pulp (basis weight: 20 g/m 2 , manufactured by Inogami Co., Ltd.). It was applied in layers at a basis weight of 50 g/m 2 .
  • a second moisture-permeable sheet made of wood pulp (basis weight: 30 g/m 2 , manufactured by Inogami Co., Ltd.) was laminated on the water-absorbing resin layer to obtain a water-absorbing resin layer sheet.
  • Thin paper (manufactured by Nittoku Co., Ltd.) laminated with polyethylene is used as a base sheet, and the above-mentioned paste is applied to one side of the sheet by a die coating method while adjusting the discharge pressure, to a coating area of 24.0 cm 2 . was applied to obtain a sheet-like coated product.
  • sodium chloride manufactured by Otsuka Pharmaceutical Co., Ltd., pharmacopoeia sodium chloride
  • a water absorbent resin sheet was laminated on the paste side to obtain a laminate precursor.
  • the obtained laminate precursor was cut into a size of 49 mm ⁇ 49 mm to obtain a laminate in which a water-absorbing resin layer was arranged on the heat generating composition side of the coating type heat generating element.
  • the laminate is sandwiched between a first sheet material having air permeability and a second sheet material having no air permeability, each cut to 63 mm x 63 mm, and these sheet materials are heat-sealed on four sides and housed in a packaging material.
  • a heat generating element was obtained.
  • the first sheet material used had air permeability shown in Table 1 below.
  • the first sheet material in the packaging material was arranged so that the inner surface thereof and the outer surface of the sheet of the water absorbent resin layer faced each other.
  • the second sheet material in the packaging material was arranged so that the inner surface thereof and the surface on which the base material sheet was present faced each other.
  • the heating element accommodated in the packaging material is held between the top sheet made of the needle-punched nonwoven fabric (basis weight 80 g/m 2 ) and the back sheet made of the air-through nonwoven fabric (basis weight 30 g/m 2 ).
  • an eye mask type heating tool having the structure illustrated in FIGS. 4 to 7 was obtained.
  • the surface sheet was arranged such that its inner surface faced the outer surface of the first sheet material in the packaging material.
  • the back sheet was arranged so that the inner surface thereof and the outer surface of the second sheet material in the packaging material were opposed to each other. This heating tool is formed so that steam is generated from the heating element as heat is generated.
  • Example 10 and Comparative Example 2 In addition to the oxidizable metal, carbon material, and water used in Example 1, a mixture containing pulp fiber (coniferous kraft pulp, trade name "Skeena” manufactured by Skeena Co., Ltd., average fiber length: 2.1 mm) as a fiber material. was paper-made to make an intermediate molded body. Thereafter, an electrolyte (sodium chloride) was added to the intermediate molded body to form a paper-making type heating element having the raw material ratio shown in Table 1 below. Then, a heating device was formed in the same manner as in Example 1, using the air permeable sheet material shown in Table 1 below as the air permeable sheet material constituting the packaging material. This configuration is illustrated in FIG. 1(b).
  • pulp fiber coniferous kraft pulp, trade name "Skeena” manufactured by Skeena Co., Ltd., average fiber length: 2.1 mm
  • electrolyte sodium chloride
  • Example 11 to 15 A heating tool was manufactured in the same manner as in Example 6, except that the content of sodium chloride or the content of the carbon material was changed in preparing the paste of the exothermic composition.
  • Example 16 A heating implement was manufactured in the same manner as in Example 3, except that the first sheet material constituting the packaging material was changed to one having the air permeability shown in Table 1 below.
  • the duration of 38° C. or higher and the maximum temperature reached in the heating tools of Examples and Comparative Examples were measured in an environment of room temperature of 20° C. and humidity of 50% RH by the following method.
  • the heating implement sealed in the oxygen-blocking bag was opened, and the heating implement was taken out.
  • the measurement surface of the temperature sensor of the data collection type thermometer (LT-8, manufactured by Gram) on the upper eyelid of the wearer. was installed and secured with tape.
  • the temperature was measured over time with a thermometer measuring device connected to the temperature sensor.
  • the temperature was measured at intervals of 10 seconds from the start of heat generation and measured for a total of 60 minutes.
  • the results are shown in Table 1 below.
  • the heating implements of each example are provided with a heating element in which one or more of the constituent materials of the heating element have a specific relationship, so that they are compared with the heating implements of the comparative examples.
  • Example 6 in which the content ratio of the constituent materials of the heating element is within a suitable range, has good temperature characteristics and temperature durability, and the amount of water vapor generated is significantly higher than that of the other examples. Therefore, it can be seen that the configuration is more suitable as a heating tool.
  • the heating tool of the present disclosure can be manufactured at a low manufacturing cost, with excellent temperature characteristics and temperature sustainability due to heat generation, without increasing the content of the oxidizable metal, which is expensive. I know.
  • a heating tool that is excellent in temperature characteristics and steam generation due to heat generation is provided while suppressing manufacturing costs.

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JP2014012829A (ja) * 2012-06-07 2014-01-23 Kao Corp 発熱体、及び、これを備える温熱具
CN104910874A (zh) * 2015-06-30 2015-09-16 李翔 一种化学热袋
WO2016199245A1 (ja) * 2015-06-10 2016-12-15 花王株式会社 蒸気温熱マスク

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TWI504388B (zh) * 2011-12-21 2015-10-21 Kao Corp 蒸氣溫熱器具
WO2017014271A1 (ja) * 2015-07-21 2017-01-26 花王株式会社 温熱具
JP6721300B2 (ja) * 2015-07-21 2020-07-15 花王株式会社 発熱具及びその製造方法
CN111867530A (zh) * 2018-03-14 2020-10-30 花王株式会社 温热器具
JP2020192309A (ja) * 2019-05-24 2020-12-03 花王株式会社 水蒸気発生体及び温熱具

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014012829A (ja) * 2012-06-07 2014-01-23 Kao Corp 発熱体、及び、これを備える温熱具
WO2016199245A1 (ja) * 2015-06-10 2016-12-15 花王株式会社 蒸気温熱マスク
CN104910874A (zh) * 2015-06-30 2015-09-16 李翔 一种化学热袋

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