JP6542057B2 - Water-containing gel sheet - Google Patents

Description

  The present invention relates to a water-containing gel sheet.

  Heretofore, a water-containing gel sheet including a water-containing polymer gel layer has been developed, and when applied to the skin, it has an effect of giving a local cold sensation due to the heat of vaporization of water. Further, in order to further enhance the effect of giving a cooling sensation, such a water-containing polymer gel layer is made to contain a cooling agent. As such a cooling agent, menthol which can exhibit a high cooling effect is widely used, and it is known that menthyl lactate and the like can also be used.

  For example, Patent Document 1 discloses a sheet for skin attachment in which a nanofiber layer is laminated on a water-containing polymer gel layer, and such a water-containing polymer gel layer is a cold sheet such as l-menthol or menthyl lactate. It is stated that the sensitisers can be contained in amounts of 0.0001 to 10% by weight. When l-menthol is used as a cooling agent, a high cooling sensation can be secured, but depending on its content, there is a possibility that the irritation and the smell may be enhanced. On the other hand, menthyl lactate is a less irritating and slightly fragrant cooling agent, but has a lower cooling sensation effect than menthol, so the content thereof needs to be increased in order to enjoy a sufficient cooling sensation.

JP, 2013-132409, A

However, because menthyl lactate is easily adsorbed by the packaging material in which the sheet is enclosed during manufacture or storage of the water-containing gel sheet, the cold sensation effect diminishes when the water-containing gel sheet is taken out of the packaging material and used. There is a risk of In addition, even menthyl lactate may cause irritation as its content becomes excessive.
Under these circumstances, in the prior art of Patent Document 1 and the like, sufficient study for effectively and efficiently using menthyl lactate as a cooling agent has not been made, and there is still room for improvement.

  Therefore, the present invention can effectively and efficiently use menthyl lactate as a cooling agent, effectively suppress the adsorption to the packaging material, and can realize excellent coolness and low irritation. The invention relates to a water-containing gel sheet containing a packaging material.

  Then, when the present inventor variously examined, by using a water-containing polymer gel layer having a specific mass ratio of a specific amount of menthyl lactate and a specific type of perfume component, adsorption of menthyl lactate to the packing material is effective It has been found that a water-containing gel sheet with a packaging material can be obtained which can be suppressed to an excellent cooling feeling upon use.

That is, the present invention provides the following components (A) and (B):
(A) Menthyl lactate 0.01% by mass or more and 0.6% by mass or less,
(B) Acyclic monoterpenes and derivatives thereof, acyclic sesquiterpenes and derivatives thereof, and monoterpenes and derivatives thereof other than menthol having one cyclic structure in which the ring skeleton consists of carbon atoms only One or more selected flavor components are contained in the water-containing polymer gel layer, and the mass ratio ((A) / (B)) of the component (A) to the component (B) is 0.1 or more. The present invention relates to a water-containing gel sheet with a packaging material comprising a water-containing polymer gel layer as follows.

  According to the water-containing gel sheet with a packing material of the present invention, the adsorption of menthyl lactate to the packing material is effectively suppressed, so that an excellent cooling sensation can be exhibited without excessively containing menthyl lactate, and It is also possible to keep hypoallergenicity well.

Hereinafter, the present invention will be described in detail.
The water-containing gel sheet with a packaging material of the present invention comprises the following components (A) and (B):
(A) Menthyl lactate 0.01% by mass or more and 0.6% by mass or less,
(B) Acyclic monoterpenes and derivatives thereof, acyclic sesquiterpenes and derivatives thereof, and monoterpenes and derivatives thereof other than menthol having one cyclic structure in which the ring skeleton consists of carbon atoms only One or more selected flavor components are contained in the water-containing polymer gel layer, and the mass ratio ((A) / (B)) of the component (A) to the component (B) is 0.1 or more. The water-containing polymer gel layer which is the following is included.

  The water-containing polymer gel layer contained in the water-containing gel sheet with packaging material of the present invention contains, as the component (A), 0.01% by mass or more and 0.6% by mass or less of menthyl lactate. In use, when the water-containing gel sheet of the present invention is taken out of the packaging material and applied to the skin, the water in the water-containing polymer gel layer is evaporated and the heat of the water is removed by the heat of vaporization of the water to be cooled. The coolness is also enhanced by the menthyl lactate as the component (A), and a comfortable coolness can be provided.

  The content of the component (A) is 0.01% by mass or more in the water-containing polymer gel layer, from the viewpoint of effectively bringing about a cool feeling in combination with the water in the water-containing polymer gel layer, preferably 0. It is 03% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.06% by mass or more. In addition, the content of the component (A) is 0.6% by mass or less, preferably 0.5% by mass or less, in the water-containing polymer gel layer from the viewpoint of securing low irritation. Preferably it is 0.3 mass% or less, More preferably, it is 0.2 mass% or less. And content of a component (A) is 0.01 mass% or more and 0.6 mass% or less in a water-containing polymer gel layer, Preferably it is 0.03-0.5 mass%, Preferably it is 0.05-0.3 mass%, More preferably, it is 0.06-0.2 mass%. It is good to mix | blend component (A) with the gel undiluted | stock solution mentioned later by the quantity used as such content in a water-containing polymer gel layer.

  The water-containing polymer gel layer contained in the packaged water-containing gel sheet of the present invention has, as component (B), an acyclic monoterpene and a derivative thereof, an acyclic sesquiterpene and a derivative thereof, and a ring skeleton in the molecule It contains one or more flavor components selected from monoterpenes other than menthol and derivatives thereof having one cyclic structure consisting only of carbon atoms. Thus, by containing a specific perfume component such as component (B) as a component different from component (A) menthyl lactate and menthol, component (A) and component (B) to be described later Combined with having a specific mass ratio ((A) / (B)) between them, the adsorption of the component (A) on the packaging material is effectively suppressed and the cooling effect of the component (A) is effectively exhibited. be able to.

Component (B), acyclic monoterpenes and derivatives thereof are terpenes having a linear structure and composed of two isoprene units, and derivatives thereof, such as oscimene, myrcene, geraniol, β-citronellol, linalool, nerolol, Myrsenol, dihydromyrcenol, lavandurol, linalyl formate, geranyl formate, citronellyl formate, linalyl acetate, geranyl acetate, citroneryl acetate, neryl acetate, labanduryl acetate, osimenyl acetate, milicenyl acetate, linalyl propionate, geranyl propionate, propionone Choose from citronellyl acid, linalyl butyrate, geranyl butyrate, citronellyl butyrate, linalyl isobutyrate, geranyl isobutyrate, citronellyl isobutyrate, linalyl benzoate, geranyl benzoate, citral, citronellal etc. One or more that are mentioned.
The acyclic sesquiterpenes of component (B) and their derivatives are terpenes having a linear structure consisting of three isoprene units and their derivatives, and are selected from, for example, nerolidol, farnesol, sinensal, nerolidol acetate, etc. 1 type or 2 types or more are mentioned.
The monoterpene having one cyclic structure in which the ring skeleton is composed of only carbon atoms in the molecule of component (B) and its derivative have one cyclic structure which may be an aromatic ring and does not contain a hetero atom And monoterpenes other than menthol and derivatives thereof, such as limonene, ferandrene, terpinene, terpinolene, cymene, thymol, carvacrol, 1,8-cineole, 1,4-cineole, ascaridolol, eugenol And terpineol, carveol, carvone, piperitone, etc. 1 type, or 2 or more types, etc. are mentioned.

  Specifically, the component (B) is selected from geraniol, β-citronellol, nerol, linalool, linalool acetate, geranyl acetate, citral, citronellal, nerolidol, eugenol, thymol, and 1,8-cineole. Species or two or more species are preferable, one or two or more species selected from geraniol, β-citronellol, linalool, linalyl acetate, geranyl acetate, citral and nerolidol are more preferable, and one or more selected from linalool and linalyl acetate Two are more preferred.

  The content of the component (B) is preferably 0.01 mass in the water-containing polymer gel layer from the viewpoint of effectively suppressing the adsorption of the component (A) on the packaging material and securing an excellent cooling sensation effect. % Or more, more preferably 0.1% by mass or more, and still more preferably 0.15% by mass or more. In addition, the content of the component (B) is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably, in the water-containing polymer gel layer from the viewpoint of securing low irritation. It is 1 mass% or less. The content of the component (B) in the water-containing polymer gel layer is preferably 0.01 to 10% by mass, more preferably 0.1 to 5% by mass, and still more preferably 0.15. It is 1 mass%.

  The mass ratio of the component (A) to the component (B) ((A) / (B)) is from the viewpoint of sufficiently exhibiting the adsorption suppressing effect of the component (A) on the packaging material by the component (B). It is 1 or more, preferably 0.2 or more, and more preferably 0.3 or more. Further, the mass ratio ((A) / (B)) of the component (A) to the component (B) is 15 or less from the viewpoint of maintaining low irritation while securing a good cooling effect by the component (A). Preferably, it is 10 or less, More preferably, it is 5 or less, More preferably, it is 3 or less. The mass ratio ((A) / (B)) of the component (A) to the component (B) is 0.1 or more and 15 or less, preferably 0.2 to 10, and more preferably 0. It is 3-5, More preferably, it is 0.3-3.

  As the polymer forming the water-containing polymer gel layer, any polymer can be used as long as it can hold water and form a gel having appropriate elasticity and flexibility, for example, a carboxyl group, a sulfate group, or a phosphate group And polymers having the following functional groups. Specifically, poly (meth) acrylic acid and its salts such as carboxyvinyl polymers, polyacrylic acids and their salts, acrylic acid / alkyl methacrylate copolymers and the like; anionic cellulose derivatives such as carboxymethyl cellulose and carboxyethyl cellulose and the like Gellan gum, pectin, xanthan gum, carrageenan, agar, alginic acid and salts thereof, anionic starch derivatives and the like can be mentioned, and one or more of these polymers can be used. Among them, poly (meth) acrylic acid and its salts, from the viewpoint of combining adequate gel strength and flexibility to follow the unevenness of the skin and its movement when applied to the skin while maintaining a sufficient water retention amount. Anionic cellulose derivative and its salt, and 1 type, or 2 or more types chosen from carrageenan are preferable, and 1 type or 2 types selected from carboxymethylcellulose and its salt are more preferable. The content of these polymers is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, in the water-containing polymer gel layer from the viewpoint of continuously supplying a sufficient amount of water. More preferably, it is 1% by mass or more. From the same viewpoint, the content of these polymers is preferably 30% by mass or less, more preferably 20% by mass or less, and still more preferably 15% by mass or less in the water-containing polymer gel layer. The content of these polymers in the water-containing polymer gel layer is preferably 0.1 to 30% by mass, more preferably 0.5 to 20% by mass, and still more preferably 1 to 15%. %. It is good to mix | blend a polymer with the gel undiluted | stock solution mentioned later by the quantity which becomes the value which content in a water-containing polymer gel layer takes such value.

  The water content in the water-containing polymer gel layer is preferably 65% by mass or more, more preferably 68% by mass or more, from the viewpoint of continuously providing a cold sensation to the application site by the heat of vaporization of water. Preferably it is 70 mass% or more. The water content in the water-containing polymer gel layer is preferably 95% by mass or less, more preferably 92% by mass or less, from the same viewpoint. The water content in the water-containing polymer gel layer is preferably 65 to 95% by mass, more preferably 68 to 92% by mass, and still more preferably 70 to 92% by mass. It is preferable to mix water in the gel stock solution described later in an amount such that the amount of water in the water-containing polymer gel layer becomes such value.

  When forming a gel with the above-described polymer, it is preferable to use a crosslinking agent to further react with a functional group possessed by the polymer. As such a crosslinking agent, metal ion compounds such as oxides, hydroxides and salts containing aluminum, magnesium, titanium, chromium, manganese, iron, cobalt, nickel, zinc, cadmium, lead, calcium, potassium etc .; polylysine Cationic polymers such as polyamino acids; ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, etc. One or more selected from polyfunctional epoxy compounds in combination You may Among them, it is preferable to use one or more selected from metal ion compounds such as oxides and hydroxides containing aluminum and / or magnesium, and salts. Specific examples of such metal ion compounds include aluminum hydroxide and magnesium aluminum metasilicate.

  The water-containing gel sheet with packaging material of the present invention can maintain excellent cool feeling for a long time without necessarily containing menthol which is a cooling agent which has been widely used conventionally. Therefore, it can be used while appropriately reducing the content of menthol, and there is no need to consider the irritation, smell, etc. that can be enhanced as the content increases, and it is possible to secure a good feeling in use. Such menthol includes l-menthol, d-menthol and dl-menthol. The content of these menthols in the water-containing polymer gel layer is preferably 0.05% by mass or less, more preferably 0.02% by mass or less, and effectively and effectively reducing irritation. From the point of view, it is not necessary to contain menthol except in the case of unavoidable mixing.

The pH of the water-containing polymer gel layer is preferably 3.5 to 7. Usually, the pH of normal human skin is in the above range, and if the pH of the skin fluctuates more than necessary, the function of the skin is impeded, so the pH of the water-containing gel sheet that can be in direct contact with the skin is also in the above range. Is preferred. The pH may be adjusted by using a pH adjuster as appropriate. As a pH adjuster, for example, organic acids such as succinic acid, citric acid and tartaric acid or salts thereof, or phosphoric acid or salts thereof are suitably used. The pH of the water-containing polymer gel layer is more preferably 4 to 7, and still more preferably 4 to 6.5.
The pH of the water-containing polymer gel layer is 0.5 g of the water-containing polymer gel in the water-containing polymer gel layer, mixed and stirred until dissolved in 4.5 g of pure water, and the pH of the dispersion is It is a value measured by a meter (B-212, HORIBA).

  In the water-containing polymer gel layer, in addition to the above components, other components generally used in cosmetics and medicines, such as glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, polyglycerin, polyethylene glycol etc. Moisturizers such as polyhydric alcohols, urea and sodium hyaluronate; oils; surfactants such as anionic surfactants, cationic surfactants, amphoteric surfactants and nonionic surfactants; medicinal ingredients; preservatives Antioxidants; Ultraviolet absorbers; Solubilisers; Colorants; "Synthetic perfume chemistry and product knowledge", Motokazu Inou, 1996 Chemical Industry Daily; "Perfume and Flavor Chemicals" , By Stephen Arctander (STEFFENARCTAMDER) A perfume such as described in the literature, such as 1969, and may be appropriately contain a perfume component other than the components (A) and (B). Moreover, these components may be contained in this, when using the support body layer mentioned later.

  The thickness of the water-containing polymer gel layer is such that the water-containing gel sheet with a wrapping material of the present invention has a specific basis weight in the water-containing polymer gel layer, as described below. When a support layer is laminated, it is preferably 0.1 mm or more, more preferably 0.1 mm or more, from the viewpoint of continuing to transfer a sufficient water content to the skin and support layer to which a sufficient water content is attached. Is 0.3 mm or more, more preferably 0.5 mm or more. From the same viewpoint, the thickness of the water-containing polymer gel layer is preferably 4 mm or less, more preferably 3 mm or less, and still more preferably 2 mm or less. The thickness of the water-containing polymer gel layer is preferably 0.1 to 4 mm, more preferably 0.3 to 3 mm, and still more preferably 0.5 to 2 mm.

The water-containing gel sheet with packaging material of the present invention may contain a support layer in addition to the water-containing polymer layer from the viewpoint of supporting the water-containing polymer layer well. In this case, the support layer is preferably laminated on at least one surface of the water-containing polymer gel layer. As such a support layer, a sheet-like moisture-permeable substrate can be mentioned. In particular, the basis weight of the support layer is 3 g / l from the viewpoint of enhancing the cooling effect by transferring water from the water-containing polymer gel layer to the support layer and gradually evaporating the water from the support layer. m ² or more is preferable, 10 g / m ² or more is more preferable, 70 g / m ² or less is preferable, and 60 g / m ² or less is more preferable. Specifically as a support body layer which has this basic weight, a fiber sheet is preferable, for example, 1 type, or 2 or more types chosen from a nonwoven fabric, woven fabric, knitted fabric and paper are mentioned, Preferably it is a nonwoven fabric, More specifically, a fiber having a core-sheath structure consisting of a core portion and a sheath portion, a water-absorbent fiber such as cotton, pulp, rayon, cellulose, acrylic fiber or the like, or a void for retaining water inside the fiber is formed. Non-woven fabrics containing fibers and the like exhibiting a porous structure are preferred.

  The thickness of the support layer is preferably 0.01 mm or more, and more preferably 0, from the viewpoint of not inhibiting the transpiration of water contained in the water-containing polymer gel layer and maintaining this effect for a long time. It is .05 mm or more. From the same viewpoint, the thickness of the support layer is preferably 0.8 mm or less, more preferably 0.6 mm or less. The thickness of the support layer is preferably 0.01 to 0.8 mm, more preferably 0.05 to 0.6 mm.

  In order to form a water-containing polymer gel layer and produce the water-containing gel sheet with packaging material of the present invention including such a gel layer, first, component (A), component (B), polymer, water, and, if necessary, Prepare a gel stock solution containing other ingredients. Next, a gel stock solution is sandwiched between peelable films and spread using a baker-type applicator or the like to form a pre-crosslinking water-containing gel sheet including a water-containing polymer gel layer. At this time, the above-mentioned support layer may be laminated on one side of the gel stock solution. Then, the obtained water-containing gel sheet before crosslinking is sealed in a packing material in which the innermost layer described later is polyethylene, and the gel is crosslinked by aging for several days under heating at 50 ° C. to obtain a packing material-containing water-containing gel sheet . The water-containing gel sheet with packaging material can be manufactured according to a conventionally known method, and is not limited thereto.

  The packaging material which encloses the said water-containing gel sheet may be a laminated body comprised from a single layer or multiple layers. Among them, it is preferable that the innermost layer of the packaging material is formed of a polyolefin resin, from the viewpoint that the adsorptivity of menthyl lactate is readily apparent and the effects of the present invention are significantly exhibited. The polyolefin resin is preferably a resin containing at least polyethylene or polypropylene.

  The water-containing gel sheet with packaging material of the present invention is preferably used by sticking it to the skin after taking it out of the packaging material. In such a water-containing gel sheet, the adsorption of the component (A) of menthyl lactate to the packaging material is effectively suppressed, so that a cool feeling is effectively and persistently applied to the stuck skin, and the irritation is also reduced. Ru. That is, as cosmetics, medicines, quasi-drugs and general goods for sticking on the skin (including the scalp), the use thereof is diverse. For example, if you want to add a cold sensation to your forehead or neck when you have a sudden fever, you may feel mild but comfortable coolness to your limbs, body, neck, face, and head before bedtime at night when it is hot and uncomfortable in summer. If you want to apply effectively and continuously, it is possible to use it on the skin of the desired site without using the sheet frequently in and out of the room at the time of high temperature and humidity in summer, and it is also for sensitive skin sensitive to irritation. It can be used with confidence.

The present invention further discloses the following cooling sensation sheet regarding the above-mentioned embodiment.
[1] The following components (A) and (B):
(A) Menthyl lactate 0.01% by mass or more and 0.6% by mass or less,
(B) Acyclic monoterpenes and derivatives thereof, acyclic sesquiterpenes and derivatives thereof, and monoterpenes and derivatives thereof other than menthol having one cyclic structure in which the ring skeleton consists of carbon atoms only One or more selected flavor components are contained in the water-containing polymer gel layer, and the mass ratio ((A) / (B)) of the component (A) to the component (B) is 0.1 or more. A packing material-containing water-containing gel sheet comprising a water-containing polymer gel layer as follows:
[2] The content of the component (A) in the water-containing polymer gel layer is preferably 0.03% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.06% by mass The water-containing gel sheet with the wrapping material of the above [1], which is the above, preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less.
[3] One or at least one component (B) is preferably selected from geraniol, β-citronellol, nerol, linalool, linalyl acetate, geranyl acetate, citral, citronellal, nerolidol, eugenol, thymol, and 1,8-cineole It is 2 or more types, more preferably 1 or 2 types selected from geraniol, β-citronellol, linalool, linalyl acetate, geranyl acetate, citral and nerolidol, further preferably selected from linalool and linalyl acetate The water-containing gel sheet containing the packaging material of said [1] or [2] which is 1 type or 2 types.
[4] The content of the component (B) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.15% by mass or more, and preferably 10 The water-containing gel sheet with a wrapping material according to any one of the above [1] to [3], which is not more than mass%, more preferably not more than 5% by mass, and still more preferably not more than 1% by mass.

[5] The mass ratio ((A) / (B)) of the component (A) to the component (B) is preferably 0.2 or more, more preferably 0.3 or more, and preferably 10 or less. The water-containing gel sheet with a wrapping material according to any one of the above [1] to [4], which is more preferably 5 or less, further preferably 3 or less.
[6] The water content in the water-containing polymer gel layer is preferably 65% by mass or more, more preferably 68% by mass or more, still more preferably 70% by mass or more, preferably 95% by mass or less The water-containing gel sheet with a wrapping material according to any one of the above [1] to [5], which is more preferably 92 mass% or less.
[7] The above-mentioned [1] to [6], wherein the water-containing polymer gel layer contains one or more metal ion compounds selected from oxides, hydroxides and salts containing aluminum and / or magnesium. ] Any one water-containing gel sheet with packaging material.
[8] The content of menthol in the water-containing polymer gel layer is preferably 0.05% by mass or less, more preferably 0.02% by mass or less, or not containing menthol [1] ]-[7] any one water-containing gel sheet containing packaging material.

[9] The pH of the water-containing polymer gel layer is preferably 3.5 to 7, more preferably 4 to 7, and still more preferably 4 to 6.5 any of the above [1] to [8] Water-containing gel sheet with 1 or 2 packaging materials.
[10] The thickness of the water-containing polymer gel layer is preferably 0.1 mm or more, more preferably 0.3 mm or more, still more preferably 0.5 mm or more, preferably 4 mm or less, more preferably The water-containing gel sheet with a wrapping material according to any one of the above [1] to [9], which is 3 mm or less, more preferably 2 mm or less.
[11] A support layer laminated on a water-containing polymer gel layer, and the basis weight of the support layer is preferably 3 g / m ² or more, more preferably 10 g / m ² or more, preferably The water-containing gel sheet with a wrapping material according to any one of the above [1] to [12], which is 70 g / m ² or less, more preferably 60 g / m ² or less.
[12] The water-containing gel sheet with a wrapping material of the above-mentioned [11], wherein the thickness of the support layer is preferably 0.01 to 0.8 mm, more preferably 0.05 to 0.6 mm.
[13] The innermost layer of the packaging material is preferably formed of a polyolefin resin, and more preferably is formed of a resin containing at least polyethylene or polypropylene. The packaging material of any one of the above [1] to [12] Water-containing gel sheet.

  Hereinafter, the present invention will be specifically described based on examples. In addition, unless otherwise indicated in the table, the content of each component indicates mass%.

[Examples 1 to 21, Comparative Examples 1 to 6]
According to the formulation shown in Tables 1 and 2, a water-containing polymer gel layer having a thickness of 0.8 mm was produced by the following method.

Specifically, first, glycerin, propylene glycol prepared by heating and dissolving methyl parahydroxybenzoate, polyvinyl alcohol, sodium carboxymethyl cellulose, hydroxyethyl cellulose (not used only in Example 21), aluminum hydroxide ("dried aluminum hydroxide gel ", Kyowa Chemical Industry Co., Ltd.) was charged into a kneader, and then a succinic acid aqueous solution and polyethylene glycol 400 (not used only in Comparative Example 3) were added to prepare an uncrosslinked gel stock solution. Next, the obtained uncrosslinked gel stock solution was sandwiched in a polyethylene terephthalate (PET) film, and the thickness of the gel stock solution was adjusted to 0.8 mm with a Baker-type applicator and spread to form a sheet. A moisture-permeable non-woven fabric (PET + pulp = 80 + 20% by mass) with a thickness of 0.2 mm and a basis weight of 20 g / m ² is pressed against one side of a sheet and laminated, and the obtained sheet is sealed in an aluminum pillow and sealed. It was aged at 50 ° C. for 2 days, and the crosslinking reaction in the gel stock solution was allowed to proceed to form a water-containing gel sheet. The prepared gel stock solution had a pH of 4.5 to 6.5. The obtained water-containing gel sheet was cut into a rectangle (area 50 cm ² ) and completed.

  Using the obtained water-containing gel sheet, the residual rate (%) of menthyl lactate was calculated according to the following method, and the feeling of irritation and the feeling of coolness were evaluated.

Remaining rate of lactic acid menthyl
Extraction of menthyl lactate was performed by the following method for the purpose of quantifying menthyl lactate contained in the water-containing gel sheet.
First, the gelled water-containing gel sheet was placed in a glass bottle, then 100 mL of ethanol was added, and then sealed up, sonicated for 30 minutes, and shaken (60 ° C.) for 60 minutes. Next, this sample solution is subjected to gas chromatography (Agilent 7890A (Agilent Technology Inc.), column: J & W Ultra-1 25 m × 0.2 mmid × 0.11 μm df, column temperature: 100 ° C. (0 min) → (5 ° C.) → 200 ° C. → (20 ° C.) → 240 ° C. (5 min), inlet temperature: 240 ° C., injection amount: 1 μL, detector temperature: 260 ° C., detector: FID) The residual ratio was calculated based on the following equation from the ratio of the compounding amount to the amount of menthyl lactate in the water-containing gel sheet quantified by the gas chromatography.
Residual rate (%) = amount of menthyl lactate contained in the water-containing gel sheet (g) / blending amount (g) × 100
The results are shown in Tables 1-2.

After peeling off the PET film on one side of the obtained water-containing gel sheet, the side is attached to the forehead, and under the environment of temperature 28 ° C., humidity 60%, the stimulation feeling until 30 minutes after immediately after the application Therefore, it evaluated.
"Stimulus"
A: The feeling of stimulation was not felt at all B: The feeling of stimulation was felt slightly C: The feeling of stimulation was felt strongly The results are shown in Tables 1-2.

"Cooling feeling"
After peeling the PET film on one side of the water-containing gel sheet obtained in Examples 12, 14, 19 and Comparative Examples 1 to 3, the side is attached to the forehead and attached under an environment of temperature 28 ° C. and humidity 60%. Immediately after, 10 minutes, 20 minutes, and 30 minutes passed, the cooling sensation was evaluated by three monitors according to the following criteria, and the average value was determined. The present evaluation indicates that the closer the value is to "3", the better the cooling feeling is obtained.
The results are shown in Table 3.
0: I do not feel anything 1: I feel a faint coolness 2: I feel a weak coolness 3: I feel a comfortable coolness 4: I feel a strong coolness 5: I feel like a strong sense of stimulation rather than a coolness

Claims (7)

The following components (A) and (B):
(A) Menthyl lactate 0.01% by mass or more and 0.6% by mass or less,
(B) One or more flavor components selected from geraniol, β-citronellol, linalool, linalyl acetate, geranyl acetate, citral, nerolidol, thymol, and 1,8-cineole in a water-containing polymer gel layer A packaging material-containing water-containing gel sheet comprising: a water-containing polymer gel layer which contains and has a mass ratio ((A) / (B)) of component (A) to component (B) of 0.1 or more and 15 or less.   The water-containing gel sheet with a wrapping material according to claim 1, wherein the innermost layer of the wrapping material is formed of a polyolefin resin.   The water-containing gel sheet with a wrapping material according to claim 1 or 2, wherein the water content in the water-containing polymer gel layer is 65% by mass or more and 95% by mass or less.   The water-containing polymer gel layer further contains one or more metal ion compounds selected from oxides, hydroxides, and salts containing aluminum and / or magnesium. The water-containing gel sheet with a packaging material as described in a term.   The content of menthol in the water-containing polymer gel layer is 0.05% by mass or less, The water-containing gel sheet with a wrapping material according to any one of claims 1 to 4. The water-containing gel sheet with a wrapping material according to any one of claims 1 to 5, comprising a support layer having a basis weight of 3 g / m ² or more and 70 g / m ² or less laminated on a water-containing polymer gel layer. The water-containing gel sheet with a wrapping material according to any one of claims 1 to 6, wherein the content of the component (B) in the water-containing polymer gel layer is 0.1% by mass or more and 10% by mass or less .