JP2007029606A - Cooling sheet and its manufacturing method - 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 10 for which a water-insoluble adhesive material layer 12 is provided on one surface of a holding sheet 11 and a gel layer 14 composed of the aqueous gel g of the high water content and the low adhesiveness is held on the surface on the opposite side of the holding sheet, many through-holes 12a are formed in at least the water-insoluble adhesive material layer, and the aqueous gel is filled inside the holding sheet and many through-holes provided in the water-insoluble adhesive material layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling sheet and a method for manufacturing the same, and particularly to the point that a high cooling effect can be maintained for a long time, and that the cooling sheet can be applied sufficiently so that it does not easily peel off from the application site of the body. It has characteristics.

  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 according to the present invention, in order to solve the above-described problems, a water-insoluble adhesive layer is provided on one side of the holding sheet, while the opposite surface of the holding sheet has high moisture content and is adhesive. A cooling sheet in which a gel layer composed of a low hydrous gel is held, at least a plurality of through holes are formed in the water-insoluble adhesive layer, and the water-containing gel and the water-insoluble pressure-sensitive adhesive are formed. A large number of through holes provided in the layer were filled.

  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 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 the cooling sheet, the pressure-sensitive adhesive used for the water-insoluble pressure-sensitive adhesive layer provided on one side of the holding sheet includes, for example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, and a vinyl ether-based pressure-sensitive adhesive. A water-insoluble adhesive can be used.

  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 manufacturing method according to the present invention, the step of forming a water-insoluble adhesive layer having a large number of through holes formed on one side of the holding sheet, and the gel on the opposite side of the holding sheet A solution is supplied to form a gel layer composed of a hydrous gel having a high moisture content and low tackiness, and the gel solution is allowed to penetrate into a large number of through holes provided in the holding sheet and the water-insoluble adhesive layer. And a step of filling them with a water-containing gel having a high water content and low tackiness.

  Here, in forming a water-insoluble adhesive layer provided with a large number of through-holes on one side of the holding sheet, a sheet made of a water-insoluble adhesive layer provided with a number of through-holes is provided above. In addition to being attached to one side of the holding sheet, after forming a water-insoluble adhesive layer on one side of the holding sheet, a number of penetrations are made so as to penetrate the water-insoluble adhesive layer and the holding sheet. A hole can be provided, and the holding sheet can also be provided with a through hole corresponding to the water-insoluble adhesive layer.

  In the cooling sheet of this invention, as described above, a plurality of through holes are provided in the water-insoluble adhesive layer on one side of the holding sheet, and the moisture content of the water on the opposite side of the holding sheet is high. Since the gel layer made of gel was formed and the water-containing gel having high moisture content and low adhesiveness was filled in the numerous through holes provided in the holding sheet and the water-insoluble adhesive layer, the cooling sheet was When the above water-insoluble pressure-sensitive adhesive layer is applied to the body application site, the moisture contained in the high water content gel layer has a large number of penetrations provided in the holding sheet and the water-insoluble pressure-sensitive adhesive layer. It is sufficiently guided to the application site through the hole, and a high cooling effect can be obtained for a long time.

  Further, in the cooling sheet in the present invention, the cooling sheet is sufficiently adhered to the affixing part of the body by the water-insoluble adhesive layer, and the cooling sheet is easily detached from the affixing part. Also disappear.

  Further, in manufacturing the cooling sheet as described above, a step of forming a water-insoluble adhesive layer having a large number of through holes formed on one side of the holding sheet, and a gel on the opposite side of the holding sheet A solution is supplied to form a gel layer composed of a hydrous gel having a high moisture content and low tackiness, and the gel solution is allowed to penetrate into a large number of through holes provided in the holding sheet and the water-insoluble adhesive layer. The above cooling sheet can be easily manufactured by performing the step of filling these with a high moisture content and low water content gel.

  Hereinafter, a cooling sheet and a method for manufacturing the same according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. In addition, the cooling sheet | seat which concerns on this invention, and its manufacturing method are not specifically limited to what was shown to the following embodiment, In the range which does not change the summary, it can implement suitably.

  In the cooling sheet 10 according to this embodiment, as shown in FIGS. 1 and 2, a large number of through holes 12 a are formed on one side of a holding sheet 11 made of a fibrous structure such as a nonwoven fabric or a woven fabric using hydrophilic fibers. While the provided water-insoluble adhesive layer 12 is provided and the release paper 13 is attached to the water-insoluble adhesive layer 12, the surface of the holding sheet 11 on the side opposite to the water-insoluble adhesive layer 12 described above A gel layer 14 composed of a water-containing gel g having a high water content and low tack is formed, and the water-containing gel g having a high water content and low tack is provided on the holding sheet 11 and the water-insoluble pressure-sensitive adhesive layer 12. A large number of through holes 12a are filled.

  And in using this cooling sheet | seat 10, the release paper 13 attached to the water-insoluble adhesive layer 12 is peeled, and this water-insoluble adhesive layer 12 is stuck on the sticking site | part of a body.

  In this way, the moisture contained in the gel layer 14 having a high water content as described above is sufficiently guided to the application site through the numerous through holes 12a provided in the holding sheet 11 and the water-insoluble adhesive layer 12. In addition, a high cooling effect can be obtained for a long time, and the cooling sheet 10 is appropriately attached to the application site by the water-insoluble adhesive layer 12. It will not be easily removed from the site.

  Here, the planar shape of the cooling sheet 10 is not particularly limited, and the cooling sheet 10 can be appropriately changed according to an application site to which the cooling sheet 10 is attached. In particular, when the cooling sheet 10 is affixed to the neck, as shown in FIG. 3, the planar shape is a substantially bowl shape with the central portion 10a constricted and the side portions 10b on both sides widened. When it is used, even when the neck is twisted, the cooling sheet 10 is prevented from being easily detached, and the side portions 10b on both sides widened are pasted so as to cover the carotid arteries. In the case of sudden heat generation, a sufficient cooling effect can be obtained. Moreover, although not shown in figure, this cooling sheet | seat 10 can be formed by making it elongate and sticking so that it may wrap around inflamed sites, such as an arm and a leg. When the cooling sheet 10 is wrapped around a movable part such as an arm or a foot in this way, the above holding sheet 11 is made of a stretchable material so as not to further impair the mobility. It is preferable.

  Further, when the cooling sheet 10 is applied to a body application site as described above, the gel layer 14 having a high water content contacts the clothing and the like, and the clothing is wetted by moisture contained in the gel layer 14. In order to prevent this, it is possible to provide a nonwoven fabric or the like on the surface of the gel layer 14 on the side opposite to the water-insoluble adhesive layer 12.

  In addition, aroma oil or a pharmacologically active substance is contained in the water-containing gel g, and these substances are gradually transmitted from the cooling sheet 10 to the site of the body, so that the effects of these substances can be 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 10 of this embodiment will be described.

  First, as described above, the water-insoluble pressure-sensitive adhesive layer 12 provided with a large number of through holes 12a is formed on one side of the holding sheet 11, and the release paper 13 is attached to the water-insoluble pressure-sensitive adhesive layer 12. In this state, as shown in FIG. 4A, the release paper 13 is placed in the receiving recess 21 of the container body 20 with the release paper 13 facing down. Thereafter, the gel solution is supplied into the accommodating recess 21 of the container body 20, and the surface of the holding sheet 11 on the side opposite to the water-insoluble adhesive layer 12 has a high water content as shown in FIG. The gel layer 14 composed of a hydrous gel g having low adhesion at a high rate is formed, and the gel solution is infiltrated into the numerous through holes 12 a provided in the holding sheet 11 and the water-insoluble adhesive layer 12. These are filled with a water-containing gel g having a high water content and low adhesiveness, and an airtight sheet 30 is attached to the upper surface of the container body 20 so as to close the upper surface of the housing recess 21.

  And when using this cooling sheet | seat 10, said airtight sheet | seat 30 is removed from the upper surface of the container body 20, this cooling sheet | seat 10 is taken out from the accommodation recessed part 21, and a water-insoluble adhesive is used as mentioned above. The release paper 13 is peeled off from the layer 12, and this water-insoluble adhesive layer 12 is stuck to the sticking part of the body.

  In this embodiment, the cooling sheet 10 is manufactured so as to be accommodated in the accommodating recess 21 of the container body 20. However, as described above, a large number of through holes 12 a are provided on one side of the holding sheet 11. The water-insoluble pressure-sensitive adhesive layer 12 is formed, and with the release paper 13 attached to the water-insoluble pressure-sensitive adhesive layer 12, the release paper 13 is turned down to form the water-insoluble pressure-sensitive adhesive layer 12. The gel solution is supplied to the surface of the holding sheet 11 that is not provided with a coating or the like, and the surface of the holding sheet 11 on the side opposite to the water-insoluble pressure-sensitive adhesive layer 12 has a high moisture content and low moisture content. The gel layer 14 made of the gel g is formed, and the gel solution is infiltrated into the numerous through holes 12a provided in the holding sheet 11 and the water-insoluble pressure-sensitive adhesive layer 12 so as to be adhesive with a high water content. Low moisture gel g It is also possible to fill the al.

  In the cooling sheet 10 in this embodiment, a large number of through holes 12a are formed only in the water-insoluble adhesive layer 12 provided on one side of the holding sheet 11. For example, as shown in FIG. As shown, after forming the water-insoluble adhesive layer 12 on one side of the holding sheet 11 and attaching the release paper 13 to the water-insoluble adhesive layer 12, as shown in FIG. A large number of through holes 11a, 12a and 13a are provided so as to penetrate the holding sheet 11, the water-insoluble adhesive layer 12 and the release paper 13, and in this state, the water-insoluble adhesive layer 12 is provided. The gel solution is supplied to the surface of the holding sheet 11 which is not provided, and the gel is applied to the surface of the holding sheet 11 on the side opposite to the water-insoluble adhesive layer 12 as shown in FIG. Supply the solution, high moisture content and low moisture content A plurality of through-holes 11a, 12a, 12a, 12a provided in the holding sheet 11, the holding sheet 11, the water-insoluble adhesive layer 12, and the release paper 13. It is also possible to infiltrate into 13a and fill them with a water-containing gel g having a high water content and low tackiness. In addition, when manufacturing the cooling sheet | seat 10 in this way, in order to prevent said gel solution from leaking through these through-holes 11a, 12a, and 13a, the accommodation recessed part 21 of the container body 20 as mentioned above. It is preferable to manufacture the cooling sheet 10 so as to be accommodated in the interior. Moreover, after providing many through-holes 11a and 12a so that said holding sheet 11 and water-insoluble adhesive layer 12 may be penetrated, the release paper 13 is put in said water-insoluble adhesive layer 12 It is also possible to attach it.

It is the schematic sectional drawing which showed the cooling sheet | seat which concerns on one Embodiment of this invention. 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. It is sectional explanatory drawing which showed the process of manufacturing the cooling sheet which concerns on the example of a change of said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cooling sheet 10a Center part 10b Side part 11 Holding sheet 11a Through-hole 12 Water-insoluble adhesive layer 12a Through-hole 13 Release paper 13a Through-hole 14 Gel layer 20 Container body 21 Containment recessed part 30 Airtight sheet g Hydrous gel

Claims (5)

  In the cooling sheet in which a water-insoluble pressure-sensitive adhesive layer is provided on one side of the holding sheet, and on the opposite side of the holding sheet, a gel layer made of a hydrous gel having a high water content and low adhesion is held, at least the above A large number of through holes are formed in the water-insoluble pressure-sensitive adhesive layer, and the water-containing gel is filled in a large number of through-holes provided in the holding sheet and the water-insoluble pressure-sensitive adhesive layer. And cooling sheet.   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.   A step of forming a water-insoluble adhesive layer having a large number of through-holes formed on one side of the holding sheet; and a gel solution is supplied to the opposite side of the holding sheet to provide a high water content and low adhesiveness. A gel layer composed of a water-containing gel is formed, and the gel solution is infiltrated into a number of through holes provided in the holding sheet and the water-insoluble pressure-sensitive adhesive layer. And a step of filling the cooling sheet.   In the manufacturing method of the cooling sheet | seat of Claim 4, in forming the water-insoluble adhesive layer in which many through-holes were formed in the single side | surface of a holding sheet, the water-insoluble adhesive layer is formed in the single side | surface of a holding sheet. After forming, a method for producing a cooling sheet, wherein a plurality of through holes are formed in the water-insoluble adhesive layer and the holding sheet.

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