JP2007029607A - Cooling sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a high cooling effect for a long period of time by using aqueous gel of a high water content and low adhesiveness for cooling sheet and to sufficiently stick the cooling sheet to the sticking part of the body by preventing it from being easily peeled off. <P>SOLUTION: In the cooling sheet 1 for which a gel layer 30 composed of the aqueous gel g of the high water content and the low adhesiveness is held on one surface of a holding sheet 20 and an adhesive sheet 10 is provided on the surface of the holding sheet on the opposite side of the gel layer, as the adhesive sheet, the one for which a water-insoluble adhesive material 12 is filled inside the openings of a highly heat conductive sheet base material 11 having many openings 11a is used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling sheet, and in particular, has a feature in that a high cooling effect can be maintained for a long time and that the cooling sheet can be applied sufficiently so that it is not easily peeled off from the application site of the body. It is.

  In recent years, cooling sheets have been used for the purpose of cooling fever, inflamed areas, and moisturizing and refreshing the skin.

  And as such a cooling sheet | seat, generally, what provided the adhesive water-containing gel which made water-soluble polymer, such as polyacrylic acid, hold | maintain to olefin type nonwoven fabric etc. is used.

  Here, in the cooling sheet provided with the above-mentioned adhesive water-containing gel, when the part of the above-mentioned adhesive water-containing gel is applied to the sticking part of the body, the cooling water sheet is formed by this adhesive water-containing gel. It was not sufficiently attached to the application site and easily removed from the application site.

  However, in the case of the above-mentioned adhesive water-containing gel, there is a problem that the water content is generally low and a high cooling effect cannot be maintained for a long time.

  On the other hand, when the water content in the water-containing gel as described above is increased to increase the cooling effect, the adhesiveness of the water-containing gel is greatly reduced, and the adhesion of the cooling sheet to the application site is reduced. There was a problem that was easily removed from the affixed site.

  For this reason, in recent years, a cooling sheet has been proposed in which a non-woven fiber layer coated with an adhesive on one side is impregnated with a gel of a water-soluble polymer material having a water content of 90% by weight or more (for example, (See Patent Document 1).

However, when the nonwoven fabric fiber layer is impregnated with the water-soluble polymer material gel as described above, the amount of gel that can be impregnated in the fiber layer is limited, Still, it has been difficult to maintain a high cooling effect for a long time.
JP 2002-248121 A

  This invention makes it a subject to solve the above problems in a cooling sheet, so that a high cooling effect can be maintained for a long time by using a water-containing gel having a high moisture content and low adhesion to the cooling sheet. At the same time, it is an object of the present invention to allow the cooling sheet to be sufficiently affixed so that it is not easily peeled off from the affixing part of the body.

  In the cooling sheet of the present invention, in order to solve the above-described problems, a gel layer made of a water-containing gel having a high water content and low adhesion is held on one side of the holding sheet, on the opposite side to the gel layer. In the cooling sheet in which the pressure-sensitive adhesive sheet is provided on the surface of the holding sheet, as the above-mentioned pressure-sensitive adhesive sheet, a water-insoluble pressure-sensitive adhesive is filled in the openings of the highly heat-conductive sheet base material having a large number of openings. A thing was used.

  Here, as the above-mentioned water-containing gel, in order to obtain a high cooling effect for a long time, the water content is preferably 65% by weight or more, more preferably a water content of 90% by weight or more. Use it. The upper limit of the moisture content is not particularly limited, but is considered to be about 99% by weight from the viewpoint of the shape retention of the above water-containing gel.

  In obtaining such a water-containing gel, a water-soluble polymer having high water retention and excellent shape retention is used, and this water-soluble polymer may be either synthetic or natural. In particular, it is preferable to use a natural water-soluble polymer excellent in water retention and shape retention, such as carrageenan, gelatin, pectin, locust bean gum, xanthan gum, gellan gum, Ernest gum, agarose, dextrin, glucomannan. Polyglutamic acid and a salt thereof can be used. In addition, synthetic polymers can be mixed with these natural polymers. Suitable synthetic polymers include, for example, polyacrylic acid, sodium polyacrylate, carboxyvinyl polymer, polyvinyl alcohol, polyvinylpyrrolidone, carboxy Examples include methyl cellulose, Ernest gum, methyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose, but are not particularly limited thereto.

  The holding sheet may be any sheet as long as the hydrated gel penetrates and is sufficiently held. For example, a fibrous structure such as a nonwoven fabric or a woven fabric using various fibers, or a fiber structure such as paper. Can be used.

  In addition, the sheet base material having a large number of openings used for the above-mentioned pressure-sensitive adhesive sheet may be a metal having a mesh-like opening or a metal-plated mesh or a metal or surface. Can be used in which a sheet plated with metal is provided with openings made up of a large number of through holes.

  In addition, as the water-insoluble pressure-sensitive adhesive filled in the opening of the sheet base material, for example, various water-insoluble pressure-sensitive adhesives such as an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, and a vinyl ether-based pressure-sensitive adhesive are used. Can do.

  Here, as said acrylic adhesive, what combined the following main monomer and submonomer is mentioned. Examples of the main monomer include ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, isooctyl acrylate, decyl acrylate, decyl methacrylate, dodecyl acrylate, dodecyl methacrylate, and the like. Further, examples of the secondary monomer include acrylic acid, vinyl acetate, methyl acrylate, methyl methacrylate, maleic anhydride, 2-hydroxyethyl acrylate, and the like.

  Moreover, as a rubber-type adhesive, what combined the following elastomer and tackifier is mentioned. Examples of the elastomer include natural rubber, synthetic polyisoprene rubber, styrene / butadiene rubber, styrene / isoprene block copolymer, polyisobutylene, butyl rubber, SIS, SBR, and SBRS. Examples of tackifiers include rosin, hydrogenated rosin, rosin ester, hydrogenated rosin ester, polyterpene, terpene phenol, phenol resin, xylene resin, coumarone indene resin, other aliphatic resins (C5 resins), petroleum Resin, alicyclic hydrocarbon resin (hydrogenated aromatic resin), and the like.

  In addition, softeners (plasticizers), absorption accelerators, polyhydric alcohols, silicone oils, inorganic fillers, antioxidants (ultraviolet absorbers), and the like are added to the above-mentioned pressure-sensitive adhesive as necessary. be able to.

  Here, as the softening agent (plasticizer), polybutene, polyisobutylene, dioctyl phthalate, dibutyl phthalate, diethyl phthalate, liquid rosin ester, chlorinated paraffin, process oil, lanolin, IPM, silicone, petrolatum, solid paraffin, Liquid paraffin, plaster pace, beeswax, menthol, limonene, pinene, piperiton, terpinol, carveol, almond oil, olive oil, camellia oil, persic oil, peppermint oil, sesame oil, soybean oil, mink oil, cottonseed oil, corn oil, safflower Oil, grape oil, macadamia nut oil, egg yolk oil, safflower oil and the like.

  Further, the above absorption enhancer promotes absorption of active ingredients such as medicinal ingredients and cosmetic ingredients, and many of them overlap with the above softeners, and lanolin, liquid paraffin, beeswax, menthol, limonene, pinene. , Piperitone, terpinol, carveol, jojoba oil, almond oil, olive oil, camellia oil, persic oil, mint oil, sesame oil, soybean oil, mink oil, cottonseed oil, corn oil, safflower oil, grape oil, macadamia nut oil, egg yolk oil, Examples include safflower oil.

  Examples of the polyhydric alcohols include glycerin, propylene glycol, octanediol, polyethylene glycol, D-sorbit, crotamiton and the like.

  Examples of the silicone oil include methyl siloxane, methyl phenyl polysiloxane, and dodecamethyl polysiloxane.

  Examples of the inorganic filler include zinc oxide, titanium oxide, and calcium carbonate.

  Moreover, BHT, DTBHQ, etc. are mentioned as said antioxidant (ultraviolet absorber).

  In the cooling sheet according to the present invention, as described above, a gel layer made of a hydrous gel having a high moisture content and low tackiness is held on one side of the holding sheet, and a large number is provided on the surface of the holding sheet on the side opposite to the gel layer. Since the adhesive sheet filled with the water-insoluble adhesive was provided in the opening of the highly heat-conductive sheet base material having the opening, the cooling sheet was attached to the sticking part of the body with the adhesive sheet. In this case, the moisture contained in the high moisture content gel layer penetrates into the holding sheet, and the cooling effect due to the moisture is transmitted to the application site through the sheet substrate having high thermal conductivity, so that a high cooling effect is obtained for a long time. Be able to.

  Further, in the cooling sheet in the present invention, the cooling sheet is sufficiently adhered to the affixing site of the body by the water-insoluble adhesive filled in the opening of the above-mentioned adhesive sheet. It will not be easily removed from the site of application.

  Hereinafter, a cooling sheet according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The cooling sheet according to the present invention is not particularly limited to those shown in the following embodiments, and can be implemented with appropriate modifications within a range that does not change the gist thereof.

  In the cooling sheet 1 according to this embodiment, as shown in FIGS. 1 (A) and 1 (B), the openings 11a are not formed in the openings 11a of the sheet base material 11 having a mesh shape and high heat conductivity. The pressure-sensitive adhesive sheet 10 filled with the water-soluble pressure-sensitive adhesive 12 was used.

  Here, as the sheet base material 11, a mesh-plated surface made of a synthetic fiber is plated with a metal, and the metal to be plated is excellent in rust prevention against water and the like, and is high. A material that has thermal conductivity and does not adversely affect the human body is used. For example, silver, aluminum, or the like is used. In addition, the sheet base material 11 is not limited to such a thing, As shown in FIG. 2, the opening part which consists of many through-holes in the metal base material or the sheet base material 11 with high heat conductivity. What provided 11a can be used.

  And in this cooling sheet | seat 1, as shown in FIG. 3, said adhesive sheet 10 is attached to the single side | surface of the holding sheet 20 which consists of fiber structures, such as a nonwoven fabric using a hydrophilic fiber, and a woven fabric, While the release sheet 13 is attached to the pressure-sensitive adhesive sheet 10, the gel layer 30 is held by applying a water-containing gel g having a high water content and low adhesion to the surface of the holding sheet 20 on the side opposite to the pressure-sensitive adhesive sheet 10. .

  When using the cooling sheet 1, the release paper 13 attached to the pressure-sensitive adhesive sheet 10 is peeled off, and the water-insoluble water filled in the opening 11 a of the sheet base material 11 in the pressure-sensitive adhesive sheet 10. The cooling sheet 1 is affixed to the affixing part of the body with the adhesive 12.

  If it does in this way, while the water | moisture content contained in the gel layer 30 of high moisture content permeate | transmits the holding sheet 20 as mentioned above, the cooling effect by this water | moisture content will be transmitted to a sticking site | part through the said highly heat conductive sheet base material. In addition, a high cooling effect can be obtained for a long time, and the cooling sheet 1 is appropriately attached to the application site by the water-insoluble adhesive 12, and the cooling sheet 1 is removed from the application site. It will not be easy to come off.

  Here, the planar shape of said cooling sheet 1 is not specifically limited, It can change suitably according to the sticking site | part etc. to which this cooling sheet 1 is stuck. In particular, when the cooling sheet 1 is affixed to the neck, as shown in FIG. 4, the planar shape is a substantially bowl shape in which the central portion 1a is constricted and the side portions 1b on both sides are widened. If used, even when the neck is twisted, the cooling sheet 1 is prevented from being easily detached, and the side portions 10b on both sides widened are attached so as to cover the portions of the carotid artery, respectively. In the case of sudden heat generation, a sufficient cooling effect can be obtained. Moreover, although not shown in figure, this cooling sheet | seat 1 can also be affixed so that it may form in elongate shape and may be wound around inflamed sites, such as an arm and a leg.

  In addition, when the cooling sheet 1 is applied to the attachment site of the body as described above, the gel layer 30 having a high water content comes into contact with clothes and the like, and the clothes and the like are wetted by moisture contained in the gel layer 30. In order to prevent this, it is possible to provide a nonwoven fabric or the like on the surface of the gel layer 30 on the side opposite to the holding sheet 20.

  In addition, aroma oil or a pharmacologically active substance is contained in the above-mentioned water-containing gel g, and these substances are gradually transmitted from the cooling sheet 1 to the affixed part of the body, and the effects of these substances are obtained together with the cold and moisturizing effects. It can also be done.

  Here, as the aroma oil, essential oil components (essential oils) generally used for aromatherapy can be used as they are. Examples of the essential oil component include those described in Wonder Cellar “84 essential oil components for aromatherapy”, Fragrance Journal. Specifically, Anise, Angelica, Benzo, Immortelle, Chamomile, Garlic, Cardamom, Galvanam, Caraway, Carrot Seed, Guayac Wood, Grapefruit, Cybless, Cedarwood, Star Anise, Sage, Geranium, Celery, Thyme, Tarragon, Terpin , Frankincense, violet, pine, parsley, fennel, black pepper, bodaiju flower, lemon, lemongrass, rosemary, laurel, shimotsukegiku, shimotsueso, cornflower, almond, arnica, fennel, enishida, watercress, gentian, ginger, plum Pear, seaweed, dandelion, chimo, chorei, capsicum, green rose, mint, ash, bullock, melissa, peach, mistletoe, eucalyptus, yokuinin, Vendor, there may be mentioned extracts from forsythia, and the like otherwise thereto. Examples of other oil components include liquid paraffin, silicone oil, coconut oil, macadamia oil, sucurawan, olive oil, orange oil, jojoba oil, and the like.

  Further, the pharmacologically active substance may overlap with the above-mentioned aroma oil, such as menthol, camphor, indomethacin, ketoprofen, diclofenac, psyllium extract, dipotassium glycyrrhizinate, hyaluronic acid, arbutin, tocopherol acetate, allantoin, vitamin C, water-soluble Sex azulene, acrinol and the like.

  In addition to the above, vitamins such as vitamins A, B, C, and E, minerals such as selenium and zinc, fruit extracts such as apples, oranges, lemons, and kiwis, fruit juices, and the like can be appropriately contained. .

  Next, a method for manufacturing the cooling sheet 1 of this embodiment will be described.

  First, the adhesive sheet 10 is attached to one side of the holding sheet 20, and the release paper 13 is turned down as shown in FIG. 5A with the release paper 13 attached to the adhesive sheet 10. It is accommodated in the accommodating recess 41 of the container body 40. Thereafter, the gel solution is supplied into the housing recess 41 of the container body 40, and as shown in FIG. 5B, the surface of the holding sheet 20 on the side opposite to the pressure-sensitive adhesive sheet 10 has a high water content and is adhesive. While forming the gel layer 30 consisting of the low hydrous gel g, the gel solution is infiltrated into the holding sheet 20, and the hydrous gel g having a high water content and low adhesiveness is also filled in the holding sheet 20, An airtight sheet 42 is attached to the upper surface of the container body 40 to close the upper surface of the housing recess 41.

  When using the cooling sheet 1, the airtight sheet 42 is removed from the upper surface of the container body 40, the cooling sheet 1 is taken out from the housing recess 41, and the release sheet is removed from the adhesive sheet 10 as described above. 13 is peeled off, and the cooling sheet 1 is pasted to the pasting site of the body by the water-insoluble adhesive 12 in the pressure-sensitive adhesive sheet 10.

  In this embodiment, the cooling sheet 1 is manufactured so as to be accommodated in the accommodating recess 41 of the container body 40, but the adhesive sheet 10 is attached to one side of the holding sheet 20 as described above, With the release paper 13 attached to the pressure-sensitive adhesive sheet 10, the release paper 13 is turned down, and the gel solution is supplied to the surface of the holding sheet 20 not provided with the pressure-sensitive adhesive sheet 10 by coating or the like. 10 is formed on the surface of the holding sheet 20 on the opposite side to 10 with a high moisture content and a gel layer 30 composed of a moisture-containing gel g having low adhesiveness, and the gel solution is infiltrated into the holding sheet 20 to increase the moisture content. It is also possible to fill the holding sheet 20 with a water-containing gel g having low adhesiveness.

It is the schematic plan view and schematic sectional drawing which expanded a part of adhesive sheet used for the cooling sheet which concerns on one Embodiment of this invention. In the adhesive sheet used for the cooling sheet which concerns on said embodiment, it is the schematic plan view which showed the example of a change of a highly heat conductive sheet base material provided with many opening parts. It is a section explanatory view which expanded a part of cooling sheet concerning the above-mentioned embodiment. It is the schematic plan view which showed the example of the planar shape suitable for making the cooling sheet which concerns on said embodiment stick to a neck. It is sectional explanatory drawing which showed the process of manufacturing the cooling sheet which concerns on said embodiment using the container body provided with the accommodation recessed part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling sheet 1a Center part 1b Side part 10 Adhesive sheet 11 Sheet base material 11a Opening part 12 Water-insoluble adhesive 13 Release paper 20 Holding sheet 30 Gel layer 40 Container body 41 Containment recessed part 42 Airtight sheet g Hydrous gel

Claims (4)

  In the cooling sheet in which the adhesive sheet is provided on the surface of the holding sheet opposite to the gel layer, on the one side of the holding sheet, the gel layer made of the hydrous gel having high moisture content and low adhesiveness is held. The pressure-sensitive adhesive sheet is configured by filling a water-insoluble pressure-sensitive adhesive into the openings of a highly heat-conductive sheet base material having a large number of openings.   The cooling sheet according to claim 1, wherein the water content in the water-containing gel is 65% by weight or more.   The cooling sheet according to claim 1 or 2, wherein the holding sheet is composed of a fiber structure.   The cooling sheet according to any one of claims 1 to 3, wherein the sheet base material in the pressure-sensitive adhesive sheet is composed of a mesh having a mesh-like opening.

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