Sheet that sequentially provides warm and cool sensations, face mask including said sheet, and kit for producing said sheet

Abstract

To provide a sheet that imparts a cool feeling after a long-lasting warm feeling and has high followability to a curved surface, a face mask containing the sheet, and a kit for preparing the sheet.SOLUTION: A sheet that sequentially imparts a warm feeling and a cool feeling includes a base fabric, cool dots attached to at least one surface of the base fabric, and a warming agent impregnated in the base fabric, wherein the dots contains a cooling agent, the dot having a height of 75.0 nm to 330.0 μm, a diameter of 0.5 to 5.0 mm, and an area occupation ratio to the surface of the base fabric in a range of 3.0 to 49.0%. The face mask contains the sheet. A kit for producing the sheet includes a cooling feeling imparting sheet and a warming feeling agent or warming feeling precursor that can be impregnated into the sheet. The cooling feeling imparting sheet includes the base fabric and the cool dots attached to the at least one surface of the base fabric. The tots contain the cooling agent, the height, the diameter, and the area occupation ratio to the surface of the face fabric of the dots are in the ratios described above.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a sheet that sequentially imparts a warming sensation and a cooling sensation, a face mask including said sheet, and a kit for producing said sheet. [Background technology]

[0002] Conventionally, fabrics that contact the skin and provide a warm or cool sensation have been studied. For example, Patent Document 1 describes a heat-dissipating fabric that provides a cool sensation, including a region in which a permeation layer in which a thermoplastic elastomer is permeated into gaps formed between stitches is formed in a predetermined thickness range from one surface of the knitted fabric to the other surface. In addition, Patent Document 2 describes a warming sheet having a warming layer containing a liquid warming composition.

[0003] A product for caring for the skin, mainly on the face, is known, which uses a face mask impregnated with a cosmetic liquid. When a face mask impregnated with a cosmetic liquid imparts a warming sensation to the skin, the cosmetics penetrate well into the skin surface, and the applied cosmetics are prevented from peeling off. When a face mask impregnated with a cosmetic liquid imparts a cool sensation to the skin, the skin surface into which the cosmetics penetrate is tightened, and the applied cosmetics are prevented from peeling off. When a face mask impregnated with a cosmetic liquid imparts a warming sensation and a cool sensation to the skin in sequence, it is expected that the cosmetics penetrate well into the skin surface, and then the skin surface is tightened, and the applied cosmetics are more effectively prevented from peeling off. However, a sheet that can be used as a face mask impregnated with a cosmetic liquid and that can impart a warming sensation and a cool sensation in sequence has not been provided. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-47455 A [Patent Document 2] JP 2018-2599 A Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present invention have discovered that when cooling dots containing a cooling agent are attached in the form of dots to a base fabric impregnated with a warming agent, and the height of the cooling dots, the diameter of the cooling dots, and the area occupied by the cooling dots relative to the surface of the base fabric are within specified ranges, a sheet can be obtained that has high conformability to curved surfaces and imparts a long-lasting warmth followed by a cooling sensation.

[0006] The problem to be solved by the present invention is to provide a sheet that has high conformability to curved surfaces and that provides a cooling sensation after providing a long-lasting warm sensation. Another problem to be solved by the present invention is to provide a face mask including the sheet, and a kit for producing the sheet. [Means for solving the problem]

[0007] The above-mentioned object of the present invention has been achieved by the following means. The sheet of the present invention, which sequentially imparts a warming sensation and a cooling sensation, comprises a base fabric, cooling sensation dots attached in the form of dots to at least one side of the base fabric, and a warming sensation agent impregnated into the base fabric, the cooling sensation dots containing a cooling sensation agent, the height of the cooling sensation dots being in the range of 75.0 nm to 330.0 μm, the diameter of the cooling sensation dots being in the range of 0.5 to 5.0 mm, and the area occupancy rate of the cooling sensation dots relative to the surface of the base fabric being in the range of 3.0 to 49.0%.

[0008] The sheet of the present invention, which sequentially imparts a warm feeling and a cool feeling, includes a base fabric, cool dots attached in the form of dots on at least one surface of the base fabric, and a warming agent impregnated in the base fabric, and the cool dots include a cool agent. The height of the cool dots, the diameter of the cool dots, and the area occupied by the cool dots on the surface of the base fabric are within a predetermined range, so that the cool feeling is imparted after the warm feeling that lasts for a long time is imparted, and the sheet has high conformability to curved surfaces. If the height of the cool dots is less than 75 nm, the cool feeling is not imparted. If the height of the cool dots is more than 330 μm, the duration of the warm feeling before the cool feeling is imparted is shortened or eliminated. If the diameter of the cool dots is less than 0.5 mm, the cool feeling is not imparted. If the diameter of the cool dots is more than 5.0 mm, the duration of the warm feeling before the cool feeling is imparted is shortened or eliminated. If the area occupancy is less than 3.0%, the cool feeling is not imparted. If the area occupancy is greater than 49.0%, the sheet is less able to conform to a curved surface.

[0009] The height of the cooling dots of the sheet of the present invention that sequentially imparts a warm sensation and a cool sensation is preferably in the range of 100.0 nm to 50.0 μm. By having the height of the cooling dots in the range of 100.0 nm to 50.0 μm, the sheet of the present invention that sequentially imparts a warm sensation and a cool sensation can impart a cool sensation after imparting a warm sensation that lasts for a longer period of time.

[0010] In the sheet of the present invention which sequentially imparts a warm sensation and a cool sensation, preferably, the cooling agent contains 1-menthol, the warming agent contains glycerin, and the cooling dots have a diameter in the range of 1.0 to 2.2 mm. By the cooling agent containing 1-menthol, the warming agent containing glycerin, and the cooling dots having a diameter in the range of 1.0 to 2.2 mm, the sheet of the present invention which sequentially imparts a warm sensation and a cool sensation can impart a cool sensation after imparting a warm sensation that lasts a particularly long time.

[0011] In the sheet of the present invention which sequentially imparts a warming sensation and a cooling sensation, the cooling dots preferably further contain a thickener. By the cooling dots further containing a thickener, it becomes possible to more accurately adjust the height, diameter and area occupancy of the cooling dots.

[0012] The face mask of the present invention includes the sheet of the present invention that sequentially imparts a warm sensation and a cool sensation as described above.

[0013] The kit for producing a sheet that sequentially imparts a warm sensation and a cool sensation of the present invention includes a cooling sensation-imparting sheet and a warming agent or a warming sensation precursor that can be impregnated into the cooling sensation-imparting sheet, the cooling sensation-imparting sheet includes a base fabric and cooling sensation dots attached in the form of dots to at least one surface of the base fabric, the cooling sensation dots include a cooling sensation agent, the height of the cooling sensation dots is in the range of 75.0 nm to 330.0 μm, the diameter of the cooling sensation dots is in the range of 0.5 to 5.0 mm, and the area occupancy rate of the cooling sensation dots relative to the surface of the base fabric is in the range of 3.0 to 49.0%.

[0014] The height of the cooling dots in the kit for producing a sheet that sequentially imparts a warm sensation and a cool sensation of the present invention is preferably in the range of 100.0 nm to 50.0 μm.

[0015] In the kit for producing a sheet of the present invention that sequentially imparts a warming sensation and a cooling sensation, preferably, the cooling agent contains 1-menthol, the warming agent contains glycerin, and the cooling dots have a diameter in the range of 1.0 to 2.2 mm.

[0016] In the kit for producing a sheet that sequentially imparts a warm sensation and a cool sensation of the present invention, the cooling sensation dots preferably further contain a thickener. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention will now be described in further detail. [Sheet that sequentially provides hot and cold sensations] "Sequentially imparting a warm sensation and a cool sensation" means that the warm sensation is felt on the skin, the warm sensation lasts for 3 seconds or more, and then the skin feels a cool sensation. From the viewpoint of the feel of using the face mask in particular, the duration of the warm sensation is preferably 3 to 90 seconds, more preferably 10 to 70 seconds, and even more preferably 25 to 50 seconds.

[0018] <Base fabric> The sheet of the present invention which sequentially provides a warm feeling and a cool feeling includes a base fabric. The base fabric includes at least one of a woven fabric, a knitted fabric, and a nonwoven fabric. Preferably, the base fabric is a woven fabric, a knitted fabric, or a nonwoven fabric. When the base fabric is a woven fabric, the weave structure includes at least one of a plain weave, a twill weave, a satin weave, a rib weave, a mock weave, and a leno weave. Preferably, the weave structure is a plain weave, a twill weave, a satin weave, a rib weave, a mock weave, or a leno weave. Furthermore, the base fabric may be one layer or two or more layers. The material of the base fabric includes at least one of natural fibers such as cotton, hemp, silk, and wool, regenerated fibers such as rayon and cupra, semi-synthetic fibers such as acetate and triacetate, and synthetic fibers such as nylon, polyester, acrylic, urethane, polypropylene, polyethylene, and polyvinyl chloride. Preferably, the material is any one of these fibers. The base fabric is preferably a rayon nonwoven fabric. The mass per unit area of ​​the base fabric is, for example, 20.0 to 200.0 g / m 2 and preferably 30.0 to 100.0 g / m 2 It is. The thickness of the base fabric is, for example, 10.0 to 200.0 μm, or preferably 20.0 to 100.0 μm.

[0019] <Cooling Dot> The cooling dots are attached in the form of dots on at least one surface of the base fabric. The cooling dots are formed by applying a treatment liquid containing the raw materials for the cooling dots, which will be described later, to at least one surface of the base fabric by means of screen printing, inkjet printing, gravure coating, spraying, etc. The cooling dots are preferably attached to the surface of the base fabric that comes into contact with the skin.

[0020] The height of the cooling dots is in the range of 75.0 nm to 330.0 μm. By having the height of the cooling dots in the above range, the sheet of the present invention for sequentially imparting a warm sensation and a cool sensation can impart a cool sensation after imparting a long-lasting warm sensation. The height of the cooling dots is measured by cutting the sheet of the present invention for sequentially imparting a warm sensation and a cool sensation so as to include the highest point of the cooling dots, and observing the obtained cross section with a microscope or a scanning electron microscope (SEM). The height of the cooling dots can be measured at at least five different measurement locations, and the average of the obtained measurements can be used as the height of the cooling dots. Furthermore, the height of the cooling dots is preferably in the range of 100.0 nm to 50.0 μm. By having the height of the cooling dots in the above-mentioned preferred range, the sheet of the present invention for sequentially imparting a warm sensation and a cool sensation can impart a warm sensation that lasts longer, specifically, a cool sensation can be imparted after the sheet of the present invention for sequentially imparting a warm sensation and a cool sensation is pressed against the skin and a warm sensation is felt for 10 seconds or more. The height of the cool dots is more preferably in the range of 100.0 nm to 10.0 μm, further preferably in the range of 100.0 nm to 5.0 μm, particularly preferably in the range of 500.0 nm to 4.0 μm, and most preferably in the range of 1.0 to 3.0 μm.

[0021] The diameter of the cooling dots is in the range of 0.5 to 5.0 mm. By having the diameter of the cooling dots in the above range, the sheet of the present invention that sequentially imparts a warm feeling and a cool feeling can impart a cool feeling after imparting a long-lasting warm feeling. The shape of the cooling dots can be a circle, an approximately circle, a triangle, a rectangle, a star, or other polygon. When the shape of the cooling dots is a polygon, the diameter of a circle having the same area as the area of ​​the cooling dot is considered to be the diameter of the cooling dot. The diameter of the cooling dots is measured by observing the attachment part of the cooling dots with a microscope or a scanning electron microscope (SEM). The diameter of the cooling dots can be measured at least at five different measurement points, and the average of the measured values ​​obtained can be regarded as the diameter of the cooling dots. The diameter of the cooling dots is preferably in the range of 0.8 to 2.6 mm, and more preferably in the range of 1.0 to 2.2 mm.

[0022] The area occupancy rate of the cooling dots relative to the surface of the base fabric is in the range of 3.0 to 49.0%. When the area occupancy rate is in the above range, the sheet of the present invention that sequentially imparts a warm feeling and a cool feeling can be made to conform to a curved surface. The area occupancy rate of the cooling dots can be calculated by identifying the area of ​​the cooling dots with a microscope, measuring the area of ​​the attached area, and calculating the ratio of the area of ​​the attached area to the area of ​​the sheet. At least three different measurement areas each having a size of 5.0 cm x 5.0 cm are extracted from the sheet of the present invention that sequentially imparts a warm feeling and a cool feeling, and the area occupancy rate of these is calculated, and the average value of the calculated area occupancy rates can be used as the area occupancy rate of the cooling dots. The area occupancy rate of the cool sense dots is preferably in the range of 4.0 to 45.0%, more preferably in the range of 5.0 to 42.0%, even more preferably in the range of 21.0 to 41.0%, particularly preferably in the range of 31.0 to 40.9%, and most preferably in the range of 36.0 to 40.8%. The diameter and area occupancy of the cooling dots can be adjusted, for example, by attaching the cooling dots to the surface of the base fabric using a screen plate or gravure plate whose hole diameter and hole spacing are designed to achieve the desired diameter and area occupancy.

[0023] <Cooling agent> The cooling dots contain a cooling agent. Examples of the cooling agent include l-menthol, menthyl glyceryl ether, menthyl lactate, peppermint oil, camphor, icilin, xylitol, erythritol, cineole (also called eucalyptol), methyl salicylate, isopulegol, 3-(1-menthoxy)propane-1,2-diol, p-menthane-3,8-diol, 6-isopropyl-9-methyl-1,4-dioxaspiro-(4,5)-decane-2-methanol, menthyl succinate and its alkaline earth salts, trimethylcyclohexanol, N-ethyl-2-isopropyl-5-methylcyclohexanecarboxamide, 3-(1-menthoxy)-2-methyl-propane-1,2-diol, wintergreen, menthone, menthone glycerin ketal, [1'R,2'S, 5'R]-2-(5'methyl-2'-(methylethyl)cyclohexyloxy)ethane- 1-ol, [1'R,2'S,5'R]-3-(5'methyl-2'-(methylethyl) Cyclohexyloxy)propan-1-ol, [1'R,2'S,5'R]-4-(5 '-Methyl-2'-(methylethyl)cyclohexyloxy)butan-1-ol, Examples of the cooling sensation agent include mint and the like. One or more of these cooling sensation agents may be used. As a preferred cooling sensation agent, a compound that acts on the receptor activation channel (TRPM8) in the nerves of the skin and has an excellent skin tightening effect is used. As a preferred cooling sensation agent, a compound having a molecular weight in the range of 100 to 300 is also used in order to improve the processability of the raw material liquid of the cooling sensation dots. A preferred cooling sensation agent includes at least one of l-menthol and cineole, a more preferred cooling sensation agent is l-menthol or cineole, and a further preferred cooling sensation agent is l-menthol.

[0024] The content of the cooling agent relative to the total amount of the raw material liquid of the cooling dot is, for example, 0.01 to 20.0% by mass, preferably 0.050 to 15.00% by mass, more preferably 0.10 to 10.00% by mass, and even more preferably 0.50 to 5.00% by mass. The content of the cooling agent relative to the solid content in the raw material liquid of the cooling dot (i.e., the content of the cooling agent relative to the total mass of the cooling dot in the sheet of the present invention that sequentially imparts a warming sensation and a cooling sensation) is, for example, in the range of 8.0 to 80.0% by mass, preferably in the range of 10.0 to 60.0% by mass, more preferably in the range of 12.5 to 40.0% by mass, and even more preferably in the range of 15.0 to 30.0% by mass. The qualitative and quantitative analysis of the cooling agent may be performed, for example, by gas chromatography of an extract obtained by extracting the cooling dot with a solvent described later.

[0025] <Other ingredients> The cooling dots may further contain a thickener in addition to the cooling agent. Examples of the thickener include cellulose derivatives (e.g., methylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose), polysaccharides (e.g., xanthan gum, carrageenan, guar gum), water-soluble polymers (e.g., cross-linked acrylic acid polymers, polyvinyl alcohol, water-soluble starch), and cellulose nanofibers. One or more of these thickeners may be used. From the viewpoint of safety to the skin and processability of the raw material liquid of the cooling dots, a preferred thickener includes a cellulose derivative, and a more preferred thickener is a cellulose derivative. The content of the thickener relative to the total amount of the raw material liquid of the cooling dots is, for example, in the range of 0.5 to 15.0% by mass, preferably 1.0 to 10.0% by mass, more preferably 1.5 to 7.0% by mass, and even more preferably 2.0 to 5.0% by mass. The content of the thickener relative to the solid content in the raw material liquid of the cooling dots (i.e., the content of the thickener relative to the total mass of the cooling dots in the sheet of the present invention that sequentially imparts a warming sensation and a cooling sensation) is, for example, in the range of 20.0 to 95.0 mass%, preferably in the range of 40.0 to 90.0 mass%, more preferably in the range of 60.0 to 80.0 mass%, and even more preferably in the range of 65 to 75 mass%. Qualitative and quantitative analysis of the thickener may be performed, for example, by gas chromatography.

[0026] The cooling dots may contain a binder, a surfactant, a dispersant, a preservative, a crosslinking agent, a stimulant, etc., in addition to the thickener. Examples of the binder include starch, polyacrylic acid derivatives, polyester, polyamide, polypropylene, and polyethylene. One or more of these binders may be used. The content of the binder relative to the solid content in the raw material liquid of the cooling dots is, for example, in the range of 5.0 to 50.0% by mass.

[0027] Examples of the stimulants include jambu oleoresin, Zanthoxylum peperitum, Sanshool-I, Sanshool-II, Zanshoamide, Piper nigrum extract, cavicin, piperine, spilanthol, etc. One or more of these stimulants may be used.

[0028] Examples of the solvent used in the raw material liquid of the cooling dots include water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butyl glycol oil, glycerol aliphatic ester, polyethylene glycol, sorbitan fatty acid ester, ethylene glycol, diethylene glycol, triethylene glycol, 1,3-butylene glycol, pentamethylene glycol, hexylene glycol, hexylene glycol, 1,3-butanediol, and 1,4-butanediol, and other alcohols used in cosmetic liquids. One or more of these solvents may be used. The solvent preferably contains water and ethanol, and more preferably is water and ethanol. The content of water and ethanol is preferably 1:0.5 to 1.5, more preferably 1:0.8 to 1.3, and even more preferably 1:0.9 to 1.1, in terms of mass ratio. The content of the solvent in the total amount of the raw material liquid of the cool sense dots is, for example, in the range of 70.0 to 99.0% by mass, and preferably in the range of 80.0 to 98.0% by mass.

[0029] <Warming agent> The base fabric is impregnated with a warming agent. The warming agent may be water, glycerin, propylene glycol, vanillyl butyl, capsaicin, vanillyl ethyl ether, vanillyl propyl ether, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, gingerol, vanillyl butyl ether, 4-(1-menthoxy-methyl)-2-phenyl-1,3-dioxolane, 4-(1-menthoxy-methyl)-2-(3',4'-dihydroxy-phenyl)-1,3-dioxolane, or the like, each having a temperature in the range of 30 to 100°C. Xolane, 4-(1-menthoxy-methyl)-2-(2'-hydroxy-3'-methoxy -phenyl)-1,3-dioxolane, 4-(1-menthoxy-methyl)-2-(4'- 4-(1-menthoxy-methyl)-2-(3',4'-methylenedioxy-phenyl)-1,3-dioxolane, 4-(1-methoxy Di-methyl)-2-(3'-methoxy-4'-hydroxyphenyl)-1,3-dioxo Examples of the warming agent include orchid, capsicum oil, capsicum oleoresin, ginger oleoresin, nonylic acid vanillylamide, etc. One or more of these warming agents may be used. From the viewpoint of impregnation into the base fabric, the warming agent preferably contains at least one of water having a temperature in the range of 30 to 100°C and glycerin. The more preferred warming agent is water having a temperature in the range of 30 to 100°C or glycerin, and the even more preferred warming agent is glycerin.

[0030] The content of the warming agent in the total amount of the sheet of the present invention which sequentially provides a warming sensation and a cooling sensation is, for example, in the range of 60.0 to 99.0 mass%, preferably in the range of 70.0 to 96.0 mass%, and more preferably in the range of 85.0 to 95.0 mass%.

[0031] The content of the warming agent relative to the total amount of the sheet of the present invention which sequentially provides a warming sensation and a cooling sensation is calculated by the following formula (1) or (2). (Mass of sheet that sequentially provides hot and cold sensations - Mass of sheet that provides cooling sensations) / (Mass of sheet that sequentially provides hot and cold sensations) (1) (Mass of sheet that sequentially provides hot and cold sensations - Mass of sheet that sequentially provides hot and cold sensations after the hot sensation agent has been removed) / (Mass of sheet that sequentially provides hot and cold sensations) (2) The warming agent is removed from the sheet of the present invention which sequentially provides a warm sensation and a cool sensation, by washing the sheet of the present invention which sequentially provides a warm sensation and a cool sensation with a solvent which dissolves the warming agent, if necessary, and then heating and drying the sheet at a temperature equal to or higher than the boiling point of the warming agent or the liquid contained in the warming agent for 10 minutes and then at 105°C for 30 minutes.

[0032] A preferred embodiment of the sheet of the present invention which sequentially provides a warm sensation and a cool sensation is a sheet in which the cooling agent contains 1-menthol, the warming agent contains glycerin, and the diameter of the cooling dots is in the range of 1.0 to 2.2 mm. When the preferred sheet is pressed against the skin (e.g., facial skin), the skin feels a warm sensation, which lasts for 25 to 50 seconds, and then the skin feels a cool sensation.

[0033] [Face mask] The face mask of the present invention includes a sheet that sequentially provides a warm sensation and a cool sensation. The face mask of the present invention provides a long-lasting warm sensation and then a cool sensation, and has high conformability to the face. Therefore, when the face mask of the present invention contains a cosmetic, it is considered that the cosmetic penetrates well into the skin surface from the face mask of the present invention, and then the skin surface is tightened, and the peeling of the applied cosmetic is more effectively prevented. Examples of the shape of the sheet used in the face mask of the present invention that sequentially imparts a warm sensation and a cool sensation include a rectangle having a length of 20.0 to 30.0 cm and a width of 20.0 to 30.0 cm, a polygon having a short axis of 20 to 30.0 cm and a long axis of 20.0 to 30.0 cm, a polygon with rounded corners having a short axis of 20.0 to 30.0 cm and a long axis of 20 to 30 cm, and an (oval) circle having a short axis of 20.0 to 30.0 cm and a long axis of 20.0 to 30.0 cm.

[0034] [Kit for producing a sheet that sequentially provides a hot and cold sensation] The kit for producing the sheet of the present invention that sequentially imparts a warm sensation and a cool sensation (hereinafter, sometimes referred to as a "kit") includes a cooling sensation-imparting sheet and a warming agent or a warming sensation precursor that can be impregnated into the cooling sensation-imparting sheet. The cooling sensation-imparting sheet includes a base fabric and cooling sensation dots that are attached in the form of dots to at least one surface of the base fabric, and the cooling sensation dots include a cooling sensation agent. The base fabric, cooling sensation agent, and warming sensation agent are as described in <Base fabric>, <Cooling sensation agent>, and <Warming sensation agent> in [Sheet that sequentially imparts a warm sensation and a cool sensation], respectively.

[0035] As described in <Cooling Dots> of [Sheet that sequentially imparts a warming sensation and a cooling sensation], the height of the cooling dots is in the range of 75.0 nm to 330.0 μm, the diameter is in the range of 0.5 to 5.0 mm, and the area occupancy rate of the cooling dots relative to the surface of the base fabric is in the range of 3.0 to 49.0%.

[0036] The warming agent and warming precursor that can be impregnated into the cooling sensation imparting sheet are stored in a container separate from the cooling sensation imparting sheet. The warming agent may be stored in a heat-retaining container that is kept at 30°C or higher, for example. The warming precursor acts as the warming agent when heated, and an example of the warming precursor is water below 30°C. Just before using the kit of the present invention, the cooling sensation imparting sheet is impregnated with the warming agent (including the warming agent obtained by heating the warming precursor) or the cooling sensation imparting sheet is impregnated with the warming agent precursor, and the impregnated warming agent precursor is heated to prepare the sheet of the present invention that sequentially imparts warmth and cold sensation. The warming agent other than the warming agent obtained by heating the warming precursor may be heated just before being impregnated into the cooling sensation imparting sheet.

[0037] A preferred embodiment of the kit of the present invention is a kit in which the height of the cooling dots is in the range of 100.0 nm to 50.0 μm. By having the height of the cooling dots in the range of 100.0 nm to 50.0 μm, the sheet of the present invention that sequentially imparts a warm sensation and a cool sensation and is produced from the kit of the present invention can impart a cool sensation after imparting a warm sensation that lasts longer.

[0038] Another preferred embodiment of the kit of the present invention is a kit in which the cooling agent contains 1-menthol, the warming agent contains glycerin, and the diameter of the cooling dots is in the range of 1.0 to 2.2 mm. The sheet that sequentially imparts a warming sensation and a cooling sensation, produced from the kit of this embodiment, can impart a cooling sensation after imparting a particularly long-lasting warming sensation.

[0039] As another preferred embodiment of the kit of the present invention, the cooling dots further contain a thickener. In the sheet that sequentially imparts a warming sensation and a cooling sensation produced from the kit of this embodiment, the strength of the cooling sensation and the viscosity of the raw material liquid of the cooling dots can be adjusted. The thickener is also as described in <Other components> of [Sheet that sequentially imparts a warming sensation and a cooling sensation]. EXAMPLES

[0040] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these.

[0041] In the examples and comparative examples, various physical properties were evaluated or measured as follows. <Warmth duration> The sheet was applied to the nape of the neck below the ear, and the time from when a warm sensation was felt immediately after application until when a cool sensation was felt (duration of warm sensation) was measured. If no cool sensation was felt, it was recorded as "no cool sensation," and if the time until the cool sensation was felt was less than 1 second, it was recorded as "<1" in Tables 1 and 2.

[0042] <Ability to follow curved surfaces> A sheet cut to 5.0 cm x 5.0 cm was pressed against the cheek. If the sheet conformed to the curved surface of the cheek and no discomfort was felt, this was recorded as "good." If the sheet did not conform to the curved surface of the cheek and discomfort was felt, this was recorded as "bad" in Tables 1 and 2.

[0043] <Height of cooling dots> The sheet was cut so as to include the highest point of the cooling dots, and the resulting cross section was observed using a microscope (Keyence Corporation VHX-600). The height of each cooling dot was measured, and the average of the measured values ​​was regarded as the height of the cooling dot.

[0044] <Area of ​​cooling dots> The adhesion of the cooling dots was confirmed using a microscope (Keyence Corporation VHX-600). The diameter of the cooling dot was measured by observing the area. The measurement location was changed and the diameter of the cooling dot was measured at five locations, and the average value of the obtained measurements was regarded as the diameter of the cooling dot.

[0045] <Area occupancy rate of cool dots> The area where the cooling dots are attached is examined using a microscope (Keyence Corporation VHX-600). The area of ​​the attached portion was identified, the area of ​​the attached portion was measured, and the area occupancy rate of the cooling dots was calculated as the ratio of the area of ​​the attached portion to the area of ​​the sheet. At least three different measurement areas each measuring 5.0 cm x 5.0 cm were extracted from the sheet, and the area occupancy rate of these was calculated, and the average value of the calculated area occupancy rate was regarded as the area occupancy rate of the cooling dots.

[0046] [Example 1] A paste containing a cooling agent (solid concentration 3.5% by mass) was prepared, consisting of 97.5% by mass of water and ethanol as a solvent (the content of water and ethanol was approximately 1:1 by mass), 1.0% by mass of l-menthol (manufactured by Natural Cosmetics Laboratory Co., Ltd.) as a cooling agent, and 2.5% by mass of a cellulose derivative (Sangelose L60 by Daido Kasei Kogyo Co., Ltd.) as a thickener. The basis weight was 60.0 g / m 2The cooling agent-containing paste was screen-printed on a rayon spunlace nonwoven fabric (manufactured by Daiwabo Co., Ltd.) with a pitch of 3.0 mm so that the diameter of the cooling dots was 2.0 mm and the area occupancy rate of the cooling dots relative to the surface of the rayon nonwoven fabric was 40.6%. The screen was then dried at 120°C for 3 minutes to evaporate or volatilize water and ethanol from the rayon nonwoven fabric, thereby obtaining a cooling sheet. The cooling dots formed on the cooling sheet were composed of 28.6% by mass of l-menthol and 71.4% by mass of a cellulose derivative. The height of the cooling dots was 2.0 μm. The cooling sheet was cut into 5 cm x 5 cm pieces, the cut cooling sheet was placed in a glass petri dish with a diameter of 9 cm, and glycerin was added as a warming agent until the cut cooling sheet was completely immersed. The cut cooling sensation sheet was immersed in glycerin for 1 minute to impregnate the rayon nonwoven fabric with glycerin to prepare sample sheet 1, and the duration of the warm sensation and its ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0047] [Example 2] Sample sheet 2 was prepared in the same manner as in Example 1, except that the solid content of the paste containing the cooling agent was 0.2% by mass (the ratio of l-menthol to the cellulose derivative, and the ratio of water to ethanol were the same as in Example 1) and the height of the cooling dots was 0.1 μm, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0048] [Example 3] Sample sheet 3 was prepared in the same manner as in Example 1, except that the diameter of the cooling dots was 1.0 mm, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0049] [Example 4] Sample sheet 4 was produced in the same manner as in Example 1, except that the pitch of the screen printing of the paste containing a cooling sensation agent was 8.5 mm and the area occupancy rate of the cooling sensation dots on the surface of the rayon nonwoven fabric was 5.0%. The duration of the warm sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0050] [Example 5] Sample sheet 5 was produced in the same manner as in Example 1, except that the pitch of the screen printing of the paste containing a cooling sensation agent was 3.8 mm, the diameter of the cooling sensation dots was 2.5 mm, and the area occupancy rate of the cooling sensation dots relative to the surface of the rayon nonwoven fabric was 39.2%. The duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0051] [Example 6] Sample sheet 6 was prepared in the same manner as in Example 1, except that water at 50° C. was used as the warming agent, and the duration of the warming sensation and its ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0052] [Example 7] Sample sheet 7 was prepared in the same manner as in Example 1, except that Cineole (manufactured by Tokyo Chemical Industry Co., Ltd.) was used as the cooling agent, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0053] [Example 8] The solid content of the paste containing a cooling sensation agent was adjusted to 15% by mass (the ratio of l-menthol to the cellulose derivative and the ratio of water to ethanol were the same as in Example 1), the thickness of the screen used for screen printing the paste containing a cooling sensation agent was set to 2000 μm, and the height of the cooling sensation dots was set to 100 μm. Except for this, sample sheet 8 was prepared in the same manner as in Example 1, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 1.

[0054] [Table 1]

[0055] [Comparative Example 1] A comparative sample sheet 1 was prepared in the same manner as in Example 1, except that the solid content concentration of the cooling sensation agent-containing paste was adjusted to 0.1% by mass (the ratio of l-menthol to cellulose derivative, and the ratio of water to ethanol were the same as in Example 1) and the height of the cooling sensation dots was set to 0.05 μm, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 2.

[0056] [Comparative Example 2] The solid content of the paste containing a cooling sensation agent was adjusted to 82.5% by mass (the ratio of l-menthol to cellulose derivative and the ratio of water to ethanol were the same as in Example 1), and the thickness of the screen used for screen printing of the paste containing a cooling sensation agent was set to 2000 μm, and the height of the cooling sensation dots was set to 550 μm. Comparative sample sheet 2 was prepared in the same manner as in Example 1, and the duration of the warming sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 2.

[0057] [Comparative Example 3] Comparative sample sheet 3 was produced in the same manner as in Example 1, except that the pitch of the paste containing a cooling sensation agent was 2.5 mm when screen printing, and the area occupancy rate of the cooling sensation dots on the surface of the rayon nonwoven fabric was 58.0%, and the duration of the warm sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 2.

[0058] [Comparative Example 4] Comparative sample sheet 4 was prepared in the same manner as in Example 1, except that the pitch of the screen printing of the paste containing a cooling sensation agent was 19.0 mm and the area occupancy rate of the cooling sensation dots on the surface of the rayon nonwoven fabric was 1.0%. The duration of the warm sensation and the ability to conform to a curved surface were evaluated. The results are shown in Table 2.

[0059] [Table 2]

[0060] In Examples 1 to 8 and Comparative Examples 1 to 4, the content of glycerin as a warming agent relative to the total amount of each sample sheet, calculated according to the above formula (1), was 92.3 mass %.

[0061] No cooling sensation was felt in Comparative Sample Sheet 1, in which the cooling dots were less than 75 μm high, and Comparative Sample Sheet 4, in which the cooling dots occupied an area of ​​less than 3.0% of the surface of the rayon nonwoven fabric. The warmth of Comparative Sample Sheet 2, in which the cooling dots were more than 330 μm high, disappeared instantly. Comparative Sample Sheet 3, in which the cooling dots occupied an area of ​​more than 49.0% of the surface of the rayon nonwoven fabric, did not conform to the curved surface of the cheek, and was uncomfortable when pressed against the cheek.

[0062] On the other hand, sample sheets 1 to 8 were sheets that provided a long warmth sensation, had high conformability to curved surfaces, and sequentially provided a warm sensation and a cool sensation.

Claims

1. A sheet that sequentially imparts a warm feeling and a cool feeling, The present invention includes a base fabric, cooling dots attached in the form of dots to at least one surface of the base fabric, and a warming agent impregnated into the base fabric, The cooling dot contains a cooling agent, The height of the cool dots is in the range of 75.0 nm to 330.0 μm, The diameter of the cooling dot is in the range of 0.5 to 5.0 mm, The sheet which sequentially imparts a warm feeling and a cool feeling is characterized in that the area occupancy rate of the cool feeling dots relative to the surface of the base fabric is in the range of 3.0 to 49.0%.

2. 2. The sheet for sequentially imparting a hot sensation and a cold sensation according to claim 1, wherein the height of the cooling dots is in the range of 100.0 nm to 50.0 μm.

3. The sheet for sequentially imparting a warming sensation and a cooling sensation according to claim 1 or 2, characterized in that the cooling agent contains 1-menthol, the warming agent contains glycerin, and the diameter of the cooling dots is in the range of 1.0 to 2.2 mm.

4. The sheet for sequentially imparting a warm sensation and a cool sensation according to any one of claims 1 to 3, wherein the cooling dots further contain a thickener.

5. A face mask comprising the sheet according to any one of claims 1 to 4 which sequentially provides a warm sensation and a cool sensation.

6. A kit for producing a sheet that sequentially imparts a warm feeling and a cool feeling, The present invention includes a cooling sensation imparting sheet and a warming sensation agent or a warming sensation precursor agent that can be impregnated into the cooling sensation imparting sheet, The cooling sensation imparting sheet includes a base fabric and cooling sensation dots attached in a dot pattern to at least one surface of the base fabric, The cooling dot contains a cooling agent, The height of the cooling dot is in the range of 75.0 nm to 330.0 μm, The diameter of the cooling dot is in the range of 0.5 to 5.0 mm, The kit for producing a sheet which sequentially imparts a warm feeling and a cool feeling is characterized in that the area occupancy rate of the cooling dots relative to the surface of the base fabric is in the range of 3.0 to 49.0%.

7. 7. The kit for producing a sheet that sequentially imparts a warm sensation and a cool sensation according to claim 6, wherein the height of the cool sensation dots is in the range of 100.0 nm to 50.0 μm.

8. The cooling agent contains 1-menthol, the warming agent contains glycerin, and the cooling dots have a diameter in the range of 1.0 to 2.2 mm. A kit for producing a sheet that sequentially imparts a warming sensation and a cooling sensation according to claim 6 or 7.

9. The kit for producing a sheet that sequentially imparts a warm sensation and a cool sensation according to any one of claims 6 to 8, wherein the cooling dots further contain a thickener.

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