Sheet for body attachment

Abstract

A sheet for body application, which comprises a support and a gel layer laminated on the support, and wherein the gel layer contains (A) water, (B) a water-soluble polymer having a COO-group, and (C) aluminum atoms, and wherein the content of the component (A) in the gel layer is 50-85 mass%, inclusive. A layer comprising the support and the gel layer has a bulky softness of 0.15 N to 0.50 N and a basis weight of 1000 g / m2 to 2600 g / m2, and the gel layer has a ball number of 14 to 30 in a ball adhesion test performed under conditions of a tilt plate angle of 30 DEG C, a temperature of 23 DEG C, and 50% R.H. In accordance with JIS Z0237: 2009.

Description

Technical Field

[0001] The present invention relates to a sheet material for body attachment. Background Art

[0002] Body patch sheets (hydrogel sheets) equipped with a gel layer are being developed for various applications, such as cooling down during fever or inflammation, cooling down after exercise, and relieving stiffness in the neck and shoulders through blood circulation.

[0003] For example, in Patent Document 1 (Japanese Patent Laid-Open No. 2019-208692), in order to provide an adhesive patch that is not easily peeled off from the skin, a patch is disclosed, which comprises a support substrate and an aqueous gel laminated on the entire area of one side of the support substrate, and the elongation in one direction of a first direction and a second direction orthogonal to the first direction when viewed from above of the support substrate is higher than the elongation in the other direction.

[0004] In Patent Document 2 (Japanese Patent Publication No. 2022-98096), in order to provide an adhesive patch that improves shape retention when stretched to prevent bleeding to the back due to pressure, and reduces shape retention during use to achieve excellent followability to skin movements, there is disclosed an adhesive patch having a paste composition and a support, and the paste composition contains: (A) polyacrylic acid and polyacrylic acid neutralization: the total amount is 7 to 15% by mass, and the content mass ratio represented by polyacrylic acid / polyacrylic acid neutralization is 1.5 to 3.0; (B) one or more selected from carboxymethyl cellulose and its salts; (C) glycerin; (D) a cross-linking agent: 0.5% by mass or less; and (E) water: 50 to 80% by mass. Summary of the Invention

[0005] The present invention relates to the following.

[0006] [1] A body-adhesive sheet comprising a support and a gel layer laminated on the support,

[0007] The gel layer contains the following components (A) to (C):

[0008] (A)Water;

[0009] (B) With COO - Water-soluble polymer based on

[0010] (C) aluminum atoms,

[0011] The content of the component (A) in the gel layer is 50% by mass or more and 85% by mass or less,

[0012] The bulk softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the grammage is 1000g / m 2 Above 2600g / m 2 the following,

[0013] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted under conditions of a tilt plate angle of 30°, a temperature of 23° C., and 50% RH (relative humidity) in accordance with JIS Z0237:2009. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram showing the measurement sites of skin temperature in the evaluation of the sustainability of the cooling effect in the example. DETAILED DESCRIPTION

[0015] Hereinafter, the body-adhesive sheet of the present invention will be described.

[0016] [Body attachment sheet]

[0017] The body-adhesive sheet of the present invention (hereinafter also referred to as "the sheet of the present invention") comprises a support and a gel layer laminated on the support, and

[0018] The gel layer contains the following components (A) to (C):

[0019] (A)Water;

[0020] (B) With COO - Water-soluble polymer based on

[0021] (C) aluminum atoms,

[0022] The content of the component (A) in the gel layer is 50% by mass or more and 85% by mass or less,

[0023] The bulkiness and softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following,

[0024] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH.

[0025] The body-adhesive sheet of the present invention has the above-mentioned structure, so even if it is a sheet with a large gram weight containing water gel, it can obtain high movement tracking performance, especially in areas with large and frequent movements such as joints such as the neck, shoulders and knees, and the duration of effects such as cooling is also excellent.

[0026] Since body-adhesive sheets are used by being adhered to the body during various daily activities, they are required to have high followability to body movements (movement followability) in order to continuously obtain desired effects.

[0027] However, in cooling hydrogel sheets, for example, to maintain a prolonged cooling effect, the water content and weight of the gel layer must be increased, leading to a thicker sheet. Furthermore, not only in cooling applications, but also in cases where the sheet contains physiologically active gases, it is desirable to increase the water content and weight of the gel layer to ensure the proper amount of the gas.

[0028] Therefore, when attached to parts of the body that move a lot, such as the neck, shoulders, and knees, conventional body-attaching sheets are easily peeled off, and there is room for improvement in terms of movement followability.

[0029] The present invention relates to a sheet for body attachment that has excellent movement tracking properties even when the gram weight of the water-containing gel (gel layer) is large, and has excellent sustainability of cooling effects, etc., especially in areas with large and frequent movements such as joints such as the neck, shoulders, and knees.

[0030] The inventors of the present invention conducted a special study and found that the above-mentioned problems can be solved by providing a sheet having a specified structure, wherein the gel layer has a specified composition, and the bulkiness and softness and gram weight of the layer composed of the support body and the gel layer, as well as the ball number of the rolling ball adhesion test in the gel layer are within a specific range.

[0031] According to the present invention, a sheet for body attachment can be provided which can achieve high movement tracking even if the sheet has a large gram weight and contains water gel, and has excellent sustainability of cooling effects, etc., especially in areas with large and frequent movements such as joints such as the neck, shoulders, and knees.

[0032] The inventors of the present invention attached a sheet material for body attachment to the body and observed the process for several hours and found that the sheet material with poor followability had fewer wrinkles and peeled off. In contrast, the sheet material with good followability had a plurality of finer wrinkles but peeled off less, thus focusing on the relationship between followability and the softness of the sheet material. In addition, on the other hand, with respect to the sheet material for body attachment, in order to effectively obtain the desired effect of the sheet material, the close contact during attachment is more important. The inventors of the present invention conducted a special study and found that by making the values of the bulky softness, one of the indicators of "softness", and the ball number of the rolling ball adhesion test, which is an indicator of adhesion, within a specific range, even a sheet material with a larger gram weight containing water gel can obtain higher movement followability, especially in the parts of the neck, shoulders, knees and other joints where there are large and frequent movements, and the duration of the cooling effect and other effects is also excellent.

[0033] In the past, in order to improve the motion-following property, the thickness of the sheet material had to be reduced. When the thickness of the sheet material was increased to increase the duration of the cooling effect, etc., the only option was to accept the state of insufficient motion-following property. However, according to the structure of the present invention, the motion-following property can be improved compared to the existing body-attaching sheet material. Therefore, even if the gram weight of the gel layer of the body-attaching sheet material is increased, a higher motion-following property can be achieved. In addition, as a result, a higher cooling effect can also be obtained. By having a predetermined composition of the gel layer, and making the bulkiness and gram weight of the layer composed of the support body and the gel layer, as well as the ball number value of the rolling ball adhesion test in the gel layer within a specific range, it is possible to combine the high gram weight of the water-containing gel with the motion-following property. In this way, the functions of the body-attaching sheet material, such as cooling property, can be fully exerted.

[0034] <Gel layer>

[0035] The gel layer included in the body patch sheet of the present invention contains the following components (A) to (C):

[0036] (A)Water;

[0037] (B) With COO - Water-soluble polymer based on

[0038] (C) aluminum atoms,

[0039] The content of the component (A) in the gel layer is 50% by mass or more and 85% by mass or less,

[0040] The bulkiness and softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following,

[0041] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH.

[0042] The sheet of the present invention having the gel layer has high motion-following properties and excellent duration of cooling effects, particularly in areas with large and frequent movements such as the neck, shoulders, and knee joints.

[0043] (Physical properties of gel layer)

[0044] In the present invention, the viscosity and elastic properties of the gel layer can be evaluated using the loss tangent (tan δ) value as an indicator. A gel layer with a larger loss tangent value means a higher viscosity.

[0045] More specifically, from the perspective of reducing the bulk and softness of the sheet and improving its followability, the loss tangent of the gel layer constituting the sheet of the present invention, as measured by dynamic viscoelasticity at a temperature of 25°C and a frequency of 0.1 Hz, is preferably 0.15 or greater, more preferably 0.20 or greater, even more preferably 0.22 or greater, even more preferably 0.25 or greater, and even more preferably 0.28 or greater. Furthermore, from the perspective of improving operability, such as suppressing excessive stickiness during sheet attachment, the loss tangent is preferably 0.70 or less, more preferably 0.60 or less, even more preferably 0.58 or less, even more preferably 0.50 or less, and even more preferably 0.35 or less. Moreover, the loss tangent of the gel layer constituting the sheet of the present invention in the dynamic viscoelasticity measurement at a temperature of 25°C and a frequency of 0.1 Hz is preferably greater than or equal to 0.15 and less than or equal to 0.70, more preferably greater than or equal to 0.20 and less than or equal to 0.60, even more preferably greater than or equal to 0.22 and less than or equal to 0.58, even more preferably greater than or equal to 0.25 and less than or equal to 0.58, even more preferably greater than or equal to 0.28 and less than or equal to 0.50, and even more preferably greater than or equal to 0.28 and less than or equal to 0.35.

[0046] Specifically, the loss tangent of the gel layer can be measured by the method described in Examples.

[0047] Initial tack is an indicator of the phenomenon in which a sheet exhibits adhesive strength in a short period of time under relatively light force. In other words, a sheet with a high initial tack exhibits high adhesion immediately after application to the skin. Furthermore, the configuration of the present invention is believed to maintain this adhesive strength during application, which is also believed to contribute to improved followability.

[0048] More specifically, to improve adhesion to the body (skin) and movement-following properties, the gel layer has a ball number of 14 or greater, preferably 16 or greater, and more preferably 18 or greater, in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of a 30° tilt plate angle, 23°C, and 50% RH. Furthermore, to improve operability, such as suppressing excessive stickiness during sheet application, and to reduce burden on the skin, the ball number is 30 or less, preferably 28 or less, more preferably 26 or less, and even more preferably 23 or less. Furthermore, the ball number is 14 or more and 30 or less, preferably 14 or more and 28 or less, more preferably 16 or more and 26 or less, and even more preferably 18 or more and 23 or less.

[0049] Specifically, the rolling ball adhesion test can be performed by the method described in the Examples.

[0050] Hereinafter, each component contained in the gel layer will be described.

[0051] (Ingredients (A): Water)

[0052] The gel layer constituting the sheet of the present invention contains water, which can utilize the heat of vaporization of the water to cool the applied area. In addition, it can allow the active ingredients such as medicinal ingredients and cooling ingredients contained as needed to effectively penetrate into the skin.

[0053] As the component (A), for example, purified water such as deionized water, distilled water, high-purity water, and ultrapure water can be used.

[0054] From the perspective of enhancing the cooling effect and allowing the active ingredients with the desired efficacy, which are included as needed, to effectively penetrate the skin, the content of component (A) in the gel layer is 50% by mass or more, preferably 55% by mass or more, more preferably 60% by mass or more, and even more preferably 65% by mass or more. Furthermore, from the perspective of improving movement followability, the content of component (A) in the gel layer is 85% by mass or less, preferably 80% by mass or less, more preferably 78% by mass or less, and even more preferably 77% by mass or less. Furthermore, the content of component (A) in the gel layer is 50% by mass or more and 85% by mass or less, preferably 55% by mass or more and 80% by mass or less, more preferably 60% by mass or more and 78% by mass or less, and even more preferably 65% by mass or more and 77% by mass or less.

[0055] (Component (B): having COO - Water-soluble polymer based on

[0056] The gel layer constituting the sheet of the present invention contains COO - A water-soluble polymer based on hydroxybenzoic acid is used as component (B).

[0057] The COO - Water-soluble polymers with COO - Therefore, it can form a cross-linked structure by the ionic interaction with the following (C) aluminum atom ionized product, that is, trivalent aluminum ion. - The water-soluble polymer having a COOH group may have a COOH group in the same molecule.

[0058] As the COO - Water-soluble polymers based on the hydroxyl radical can be used to provide carboxylate ions (COO - ) a water-soluble polymer (B1) having a carboxyl group and / or a salt thereof. Among these, from the viewpoint of obtaining a hydrogel having a high water retention capacity, sufficient gel strength, and flexibility that can follow unevenness or movement, it is preferred to use one or more selected from carboxymethyl cellulose and its salts, and polyacrylic acid and its salts, and it is more preferred to use one or more selected from carboxymethyl cellulose and its salts.

[0059] Examples of salts of carboxymethyl cellulose include alkali metal salts such as sodium salts and potassium salts, and ammonium salts. From the perspective of improving ease of acquisition and movement followability, the salt of carboxymethyl cellulose is preferably an alkali metal salt of carboxymethyl cellulose, and more preferably a sodium salt of carboxymethyl cellulose (sodium carboxymethyl cellulose).

[0060] Examples of salts of polyacrylic acid include alkali metal salts such as sodium salts and potassium salts, and ammonium salts. From the perspectives of improved availability and improved motion tracking, salts of polyacrylic acid are preferably alkali metal salts of polyacrylic acid, and more preferably sodium salts of polyacrylic acid (sodium polyacrylate). Furthermore, the salt of polyacrylic acid may be a completely neutralized product of polyacrylic acid in which all of the carboxyl groups of the polyacrylic acid are neutralized, or a partially neutralized product in which only a portion of the carboxyl groups are neutralized.

[0061] Examples of commercially available sodium carboxymethylcellulose that can be used as component (B) include the CMC Daicel series manufactured by Daicel Co., Ltd. and the SUNROSE series manufactured by Nippon Paper Industries, Ltd. Examples of commercially available polyacrylic acids or salts thereof that can be used as component (B) include the ARONVIS series and JURYMER series manufactured by Toagosei Co., Ltd. and the AQUALIC series manufactured by Nippon Shokubai Co., Ltd.

[0062] One or more components (B) may be used. From the perspective of improving ease of acquisition and movement followability, component (B) is preferably one or more selected from carboxymethyl cellulose and sodium carboxymethyl cellulose, and sodium carboxymethyl cellulose is more preferably used.

[0063] In addition, when carboxymethyl cellulose and / or its salt is used as component (B), from the viewpoint of obtaining the appropriate shape retention of the gel layer, the content of component (B) in the gel layer is preferably 1% by mass or more, more preferably 1.5% by mass or more, more preferably 2% by mass or more, further more preferably 2.3% by mass or more, and further more preferably 2.5% by mass or more. In addition, from the viewpoint of improving the followability of the action and suppressing the excessive stickiness when the sheet is attached, etc., it is preferably 5% by mass or less, more preferably 4% by mass or less, more preferably 3.8% by mass or less, and further more preferably 3.4% by mass or less. Moreover, the content of component (B) in the gel layer is preferably 1% by mass or more and 5% by mass or less, more preferably 1.5% by mass or more and 4% by mass or less, more preferably 2% by mass or more and 3.8% by mass or less, further more preferably 2.3% by mass or more and 3.4% by mass or less, and further preferably 2.5% by mass or more and 3.4% by mass or less.

[0064] Furthermore, when component (B) is a salt of carboxymethylcellulose, the content of component (B) in the gel layer refers to the content of the salt. However, when component (B) and component (C) form a crosslinked structure, the content of component (B) does not include the content of component (C). The same applies to salts of polyacrylic acid.

[0065] In addition, when polyacrylic acid and / or its salt is used as component (B), from the viewpoint of improving the shape retention and adhesion (initial tack) of the gel layer, the content of component (B) in the gel layer is preferably 3% by mass or more, more preferably 4% by mass or more, more preferably 4.5% by mass or more, and further more preferably 5% by mass or more. Moreover, from the viewpoint of improving the followability of the action and improving the operability such as suppressing excessive viscosity increase and suppressing excessive stickiness when the sheet is attached, it is preferably 10% by mass or less, more preferably 9% by mass or less, more preferably 8% by mass or less, and further more preferably 7% by mass or less. Moreover, the content of component (B) in the gel layer is preferably 3% by mass or more and 10% by mass or less, more preferably 4% by mass or more and 9% by mass or less, more preferably 4.5% by mass or more and 8% by mass or less, and further more preferably 5% by mass or more and 7% by mass or less.

[0066] (Component (C): aluminum atom)

[0067] The gel layer constituting the sheet of the present invention contains aluminum atoms as component (C). It is believed that the ionized form of component (C), namely trivalent aluminum ions, acts as a crosslinking agent for component (B), forming a crosslinked structure in the gel layer through ionic interactions with component (B).

[0068] The source of aluminum atoms as component (C) is not particularly limited as long as it is an aluminum-containing compound (hereinafter also referred to as "component (C1)"). However, from the viewpoint of easily supplying aluminum ions that can crosslink component (B) and having high solubility in the gel-forming composition when forming a gel layer, an inorganic metal salt containing aluminum is preferred.

[0069] As the aluminum-containing compound (C1) which serves as a supply source of component (C) and can act as a cross-linking agent for component (B), examples thereof include: aluminum hydroxide, magnesium aluminum hydroxide, sodium aluminate, aluminum sulfate, potassium aluminum sulfate, ammonium aluminum sulfate, aluminum carbonate, aluminum nitrate, aluminum chloride, magnesium (meta)aluminum silicate, aluminum acetate, aluminum lactate, aluminum stearate, aluminum myristate, aluminum glycinate, aluminum benzoate, aluminum chlorohydrate, etc., and one or more of these can be used.

[0070] Among the above, component (C1) is preferably one or more selected from aluminum hydroxide and magnesium aluminum (meta)silicate from the viewpoint of ease of aluminum ion supply and high solubility and good dispersibility in the gel-forming composition during gel layer formation. Furthermore, from the viewpoint of improving the adhesion of the sheet and improving the motion-following properties, component (C1) preferably comprises two or more aluminum-containing compounds, more preferably comprises at least magnesium aluminum (meta)silicate, and even more preferably aluminum hydroxide and magnesium aluminum (meta)silicate.

[0071] From the perspective of improving workability, such as suppressing excessive stickiness during sheet attachment, the content of component (C) in the gel layer is preferably 0.002% by mass or more, more preferably 0.003% by mass or more, even more preferably 0.004% by mass or more, and even more preferably 0.0045% by mass or more. Furthermore, from the perspective of reducing the bulkiness and softness of the sheet, improving adhesion, and improving movement followability, the content is preferably 0.05% by mass or less, more preferably 0.03% by mass or less, even more preferably 0.02% by mass or less, even more preferably 0.01% by mass or less, and even more preferably 0.0080% by mass or less. Moreover, the content of component (C) in the gel layer is preferably from 0.002 mass % to 0.05 mass %, more preferably from 0.003 mass % to 0.03 mass %, even more preferably from 0.004 mass % to 0.02 mass %, even more preferably from 0.004 mass % to 0.01 mass %, and even more preferably from 0.0045 mass % to 0.0080 mass %.

[0072] The content of component (C) in the gel layer can be measured according to the Japanese Pharmacopoeia, 18th Revised Edition - General Test Methods - Inductively Coupled Plasma Optical Emission Spectrometry and Inductively Coupled Plasma Mass Spectrometry. Either plasma optical emission spectrometry or inductively coupled plasma mass spectrometry can be used.

[0073] From the perspective of reducing the bulkiness and softness of the sheet, improving tackiness, and improving motion-following properties, the mass ratio [(B) / (C)] in the gel layer is preferably 200 or greater, more preferably 300 or greater, and even more preferably 400 or greater. Furthermore, from the perspective of improving operability, such as suppressing excessive stickiness during sheet attachment, the mass ratio [(B) / (C)] is preferably 800 or less, more preferably 700 or less, and even more preferably 600 or less. Furthermore, the mass ratio [(B) / (C)] in the gel layer is preferably 200 or greater and 800 or less, more preferably 300 or greater and 800 or less, even more preferably 400 or greater and 700 or less, and even more preferably 400 or greater and 600 or less.

[0074] (Component (D): polyvinyl alcohol)

[0075] The gel layer constituting the sheet of the present invention preferably further comprises polyvinyl alcohol (D). By including component (D) in addition to the aforementioned components (B) and (C), the initial tack and low-frequency viscosity of the gel layer are enhanced, thereby improving adhesion to the body (skin) and movement-following properties.

[0076] The weight average molecular weight of component (D) is not particularly limited. From the perspective of achieving adequate shape retention of the gel layer, it is preferably 30,000 or greater, more preferably 50,000 or greater, and even more preferably 70,000 or greater. Furthermore, from the perspective of improving the adhesion and movement followability of the sheet by increasing the initial tack of the gel layer, it is preferably 150,000 or less, more preferably 140,000 or less, and even more preferably 130,000 or less. Furthermore, the weight average molecular weight of component (D) is preferably 30,000 or greater and 150,000 or less, more preferably 50,000 or greater and 140,000 or less, and even more preferably 70,000 or greater and 130,000 or less.

[0077] It is believed that when the weight average molecular weight of component (D) is preferably 150,000 or less, more preferably 140,000 or less, and even more preferably 130,000 or less, the polymer chains of component (D) in the gel layer are less entangled, resulting in a more easily deformable gel structure. This effect is believed to further enhance the initial tack of the gel layer, improving its adhesion to the body (skin) and its ability to follow movements.

[0078] The weight-average molecular weight of the powdered raw material of component (D) can be obtained by measuring an aqueous solution obtained by dissolving the powdered raw material in water using size exclusion chromatography (SEC) under the following conditions. Furthermore, "the powdered raw material of component (D)" refers to the component (D) in a powdered state before being blended into the gel layer or the gel-forming composition described below. Alternatively, the weight-average molecular weight of component (D) in the gel layer can be obtained by measuring an extract of the gel layer using SEC under the following conditions.

[0079] <SEC measurement conditions>

[0080] Measuring device: "SEC-8320" manufactured by TOSOH CORPORATION

[0081] Eluent: 0.2 mol / L phosphate buffer / acetonitrile = 9 / 1 (v / v%)

[0082] Guard column: "PWXL (6 mm × 4 cm)" manufactured by TOSOH CORPORATION

[0083] Analytical column: G4000PWxL+G2500PWxL (7.8 mm × 30 cm) manufactured by TOSOH Corporation

[0084] Flow rate: 1mL / min

[0085] Column temperature: 40°C

[0086] Injection volume: 100 μL

[0087] Sample volume: 1 mg / mL

[0088] Molecular weight conversion standard: PEO manufactured by TOSOH CORPORATION (SE-150 (977,000), SE-70 (580,000), SE-30 (394,000), SE-15 (143,000), SE-8 (101,000), SE-2 (21,000))

[0089] Detector: RI (refractive index detector)

[0090] From the perspective of improving the adhesion of the sheet to the skin by increasing the initial tack of the gel layer, the saponification degree of component (D) is preferably 75 mol% or more, more preferably 82 mol% or more, and even more preferably 85 mol% or more. Furthermore, the saponification degree of component (D) can be 100 mol% or less. From the perspective of improving the water solubility of component (D) and improving its operability, it is preferably 98 mol% or less, and even more preferably 96 mol% or less. Furthermore, the saponification degree of component (D) is preferably 75 mol% or more and 98 mol% or less, more preferably 82 mol% or more and 98 mol% or less, and even more preferably 85 mol% or more and 96 mol% or less.

[0091] The saponification degree of component (D) can be measured in accordance with JIS K6726:1994.

[0092] Component (D) is preferably unmodified polyvinyl alcohol, but modified polyvinyl alcohol into which an ionic group or the like is introduced may be used as needed.

[0093] Among them, as component (D), it is preferred that the content of functional groups that can form a crosslinked structure through ionic interaction with aluminum ions is relatively low. This is to avoid hindering the formation of the crosslinked structure of component (B). For example, the content of carboxyl groups in component (D) is preferably 0.1 mol% or less, more preferably 0.01 mol% or less, and even more preferably 0 mol%.

[0094] Examples of commercially available polyvinyl alcohols that can be used as the component (D) include GOHSENOL series manufactured by Nippon Synthetic Chemical Industry Co., Ltd., KURARAY POVAL series manufactured by KURARAY CO., LTD., and JPOVAL series manufactured by JAPAN VAM & POVAL CO., LTD.

[0095] When the gel layer contains component (D), from the perspective of improving adhesion to the body (skin) and improving movement tracking, the content of component (D) in the gel layer is preferably 2% by mass or more, more preferably 7% by mass or more, and even more preferably 9% by mass or more. In addition, from the perspective of improving operability such as suppressing excessive stickiness during sheet attachment, it is preferably 18% by mass or less, more preferably 16% by mass or less, more preferably 15% by mass or less, even more preferably 12% by mass or less, and even more preferably 11% by mass or less. Moreover, the content of component (D) in the gel layer is preferably 2% by mass or more and 18% by mass or less, more preferably 7% by mass or more and 16% by mass or less, more preferably 9% by mass or more and 15% by mass or less, even more preferably 9% by mass or more and 12% by mass or less, and even more preferably 9% by mass or more and 11% by mass or less.

[0096] The content of component (D) in the gel layer can be adjusted by using 1 The extract of the gel layer was measured by H-NMR (hydrogen-nuclear magnetic resonance).

[0097] < 1 H-NMR measurement conditions>

[0098] Measuring device: JEOL "MR-400"

[0099] Observation core: 1 H

[0100] Frequency: 300MHz and above

[0101] Pulse delay time: 25 seconds

[0102] Cumulative number of times: 32 times

[0103] Mode: Presaturation

[0104] Solvent: D2O

[0105] Internal standard: 0.1% sodium trimethylolpropionate

[0106] Sample volume: 10 mg / mL

[0107] From the perspective of improving adhesion to the body (skin) and improving movement-following properties, the mass ratio [(D) / (B)] in the gel layer is preferably 0.1 or greater, more preferably 1 or greater, even more preferably 2 or greater, and even more preferably 3 or greater. Furthermore, from the perspective of improving operability, such as suppressing excessive stickiness during sheet attachment, the mass ratio [(D) / (B)] is preferably 7 or less, more preferably 6 or less, even more preferably 5 or less, and even more preferably 4 or less. Furthermore, the mass ratio [(D) / (B)] in the gel layer is preferably 0.1 or greater and 7 or less, even more preferably 1 or greater and 7 or less, even more preferably 2 or greater and 6 or less, even more preferably 3 or greater and 6 or less, even more preferably 3 or greater and 5 or less, and even more preferably 3 or greater and 4 or less.

[0108] From the viewpoint of achieving the effects of the present invention, the total content of components (A) to (D) in the gel layer is preferably 70% by mass or more, more preferably 80% by mass or more, and even more preferably 85% by mass or more, and is 100% by mass or less.

[0109] (Other ingredients)

[0110] The gel layer may contain components other than the above components (A) to (D) as appropriate within a range that does not impair the purpose of the present invention. Examples of other components include components commonly used in cosmetics, perfumes, pharmaceuticals, quasi-drugs, and the like.

[0111] Examples of ingredients commonly used in these products include moisturizers, whitening agents, blood circulation agents, anti-inflammatory agents, bactericides, ultraviolet absorbers, colorants, preservatives, antioxidants, fragrances, oils, pH adjusters, chelating agents, water-retaining agents, pharmaceuticals, cooling agents (cooling agents), warming agents, alcohols, and the like.

[0112] In addition, a physiologically active gas such as carbon dioxide may be contained. When a physiologically active gas is contained, the content of each component is the content in the total amount of the gel layer excluding the physiologically active gas.

[0113] From the viewpoint of providing a continuous cooling effect, the weight of the gel layer is preferably 900 g / m 2 More than 1100 g / m 2 More preferably, 1150g / m 2 More than 1200 g / m 2 In addition, from the perspective of improving the adhesiveness to the body (skin) and the ability to follow the movements, 2500 g / m 2 Below, more preferably 2000g / m 2 Below, more preferably 1500g / m 2 Below, more preferably 1400g / m 2 Below. Moreover, preferably 900g / m 2 Above 2500g / m 2 Below, more preferably 1100g / m 2 Above 2000g / m 2 Below, more preferably 1150g / m 2 Above 1500g / m 2 Below, more preferably 1200g / m 2 Above 1400g / m 2 the following.

[0114] From the perspective of providing a sustained cooling effect, the thickness of the gel layer is preferably 0.8 mm or more, more preferably 1.0 mm or more, and even more preferably 1.2 mm or more. Furthermore, from the perspective of improving adhesion to the body (skin) and improving movement tracking, the thickness is preferably 5.0 mm or less, more preferably 4.0 mm or less, more preferably 3.0 mm or less, even more preferably 2.5 mm or less, and even more preferably 2.0 mm or less. Furthermore, it is preferably 0.8 mm or more and 5.0 mm or less, more preferably 0.8 mm or more and 4.0 mm or less, even more preferably 1.0 mm or more and 3.0 mm or less, even more preferably 1.0 mm or more and 2.5 mm or less, and even more preferably 1.2 mm or more and 2.0 mm or less.

[0115] <Gel-forming composition>

[0116] The gel layer constituting the sheet of the present invention can be formed using a gel-forming composition containing the following components (A) to (C):

[0117] (A)Water;

[0118] (B) With COO - Water-soluble polymer based on

[0119] (C) aluminum atoms, and

[0120] The content of component (A) is 50% by mass or more and 85% by mass or less. Furthermore, the gel-forming composition may contain component (D) and other components as needed. In the present invention, the content of each component in the gel layer is considered to be the same as the content of each component in the gel-forming composition used to form the gel layer.

[0121] The gel layer constituting the sheet of the present invention can be formed using a gel-forming composition comprising the following components (A), (B1), and (C1):

[0122] (A)Water;

[0123] (B1) a water-soluble polymer having a carboxyl group and / or a salt thereof;

[0124] (C1) contains an aluminum compound, and

[0125] The content of the component (A) is 50% by mass or more and 85% by mass or less.

[0126] Components (A), (B1), (C1), and optionally component (D), other components contained in the gel-forming composition, and preferred embodiments thereof, are the same as those described for the gel layer, unless otherwise specified. Furthermore, the amounts and preferred ranges of component (A) and optionally component (D) contained in the gel-forming composition are the same as the amounts and preferred ranges of component (A) and optionally component (D) in the gel layer. Furthermore, the amount and preferred range of component (B1) contained in the gel-forming composition are the same as the amounts and preferred ranges of component (B) in the gel layer.

[0127] In the gel-forming composition, from the viewpoint of reducing the bulkiness and softness of the sheet, and improving the adhesiveness and the motion-following property, the content of component (B) relative to the content of component (C1) (mass ratio [(B) / (C1)]) is preferably 25 or more, more preferably 50 or more, and even more preferably 60 or more. In addition, from the viewpoint of improving operability, especially from the viewpoint of suppressing excessive stickiness when the sheet is attached, it is preferably 250 or less, more preferably 150 or less, more preferably 120 or less, even more preferably 100 or less, and even more preferably 95 or less. Moreover, the mass ratio [(B) / (C1)] is preferably 25 or more and 250 or less, more preferably 25 or more and 150 or less, more preferably 50 or more and 120 or less, even more preferably 50 or more and 100 or less, and even more preferably 60 or more and 95 or less. Furthermore, the preferred range of the content of component (B1) relative to the content of component (C1) (mass ratio [(B1) / (C1)]) is the same as the preferred range of the mass ratio [(B) / (C1)].

[0128] About the amount of component (C1) contained in the composition for forming gel, as long as the mass ratio [(B) / (C1)] is within the above range. From the viewpoint of improving operability, especially the viewpoint of suppressing excessive stickiness when the sheet is attached, the amount of the composition for forming gel is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, and more preferably 0.02% by mass or more. In addition, from the viewpoint of reducing the bulkiness and softness of the sheet, improving adhesion and improving followability, the amount of the composition for forming gel is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, more preferably 0.06% by mass or less, and further more preferably 0.04% by mass or less. Moreover, the amount of component (C1) contained in the composition for forming gel is preferably 0.005% by mass or less and 0.2% by mass or less, more preferably 0.005% by mass or less and 0.1% by mass or less, more preferably 0.01% by mass or less and 0.06% by mass or less, and further more preferably 0.02% by mass or less and 0.04% by mass or less.

[0129] From the viewpoint of achieving the effects of the present invention, the total content of the above-mentioned components (A), (B) (or (B1)), (C1) and, if necessary, (D) in the gel-forming composition is preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, and is 100% by mass or less.

[0130] The gel-forming composition may contain a crosslinking agent component other than component (C1) within a range that does not impair the effects of the present invention, but the content thereof is preferably small. The content of the crosslinking agent component other than component (C1) is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 0% by mass of the total crosslinking agent component.

[0131] The method for preparing the gel-forming composition is not particularly limited. When using component (D), it is preferred to prepare an aqueous solution of component (D) dissolved in water in advance and mix it with the other components in the form of an aqueous solution. Subsequently, all other components may be added to a kneading machine and mixed. Alternatively, some components may be mixed or dispersed before being added to a kneading machine and mixed.

[0132] <Structure of Body Adhesion Sheet>

[0133] The body-attaching sheet of the present invention comprises a support and a gel layer laminated on the support. A release film may also be laminated on the surface of the gel layer not laminated with the support. The release film is used to protect the gel layer and is peeled from the gel layer when the sheet is attached. Examples of the release film include unstretched polypropylene film, biaxially oriented polypropylene film, and polyethylene terephthalate film. From the perspective of providing excellent releasability, an embossed release film is preferred, and an embossed unstretched polypropylene film is even more preferred.

[0134] From the viewpoint of improving the handleability of the sheet, the body patch sheet of the present invention preferably has a three-layer structure including a support, a gel layer, and a release film in this order.

[0135] The shape of the sheet for body attachment is not particularly limited. From the perspective of improving the ease of attachment, it is preferably an outer shape (length shape) in which the length in the first direction when viewed from above is longer than the length in the second direction orthogonal thereto. Examples include: rectangular shape, elliptical shape (coin shape), etc.

[0136] (Support)

[0137] As the support constituting the sheet of the present invention, sheet-like substrates such as woven fabrics, nonwoven fabrics, knitted fabrics, synthetic resin films, and waterproof paper can be used. In addition, a laminated substrate formed by laminating a plurality of these sheet-like substrates can also be used.

[0138] Specifically, examples include: woven or non-woven fabrics of synthetic fibers composed of nylon, polyolefins (e.g., polyethylene, polypropylene, etc.), polyesters (e.g., polyethylene terephthalate, etc.), polystyrene, polyurethane, etc.; woven or non-woven fabrics of natural fibers composed of silk, cotton, linen, rayon, collagen, etc.; films composed of synthetic resins such as nylon, polypropylene, polyester, polyethylene, polyurethane, etc.; sheet substrates composed of pullulan (pullulan), starch, etc.; or laminated substrates formed by laminating multiple layers of these, etc.

[0139] Among the above, from the viewpoints of improving the handling of the sheet, the ease of lamination of the gel layer, and the followability, the support is preferably a nonwoven fabric. The material (material) of the nonwoven fabric is preferably polyester, and more preferably polyethylene terephthalate. These materials may be used alone or in combination of two or more.

[0140] Here, polyethylene terephthalate (PET) also includes a copolymer of polyethylene terephthalate (coPET). That is, PET can be used alone as a material for the nonwoven fabric, or a mixture of PET / coPET can be used.

[0141] The method for producing nonwoven fabrics is not particularly limited, and examples thereof include meltblowing, spunbonding, air-through, air-spinning, hydroentanglement, needlepunching, electrospinning, chemical bonding, and thermal compression bonding. Furthermore, any combination of these methods may be used. Of these, hydroentanglement or needlepunching are preferred, with needlepunching being more preferred, from the perspective of reducing the bulk and softness of the sheet and improving its movement-following properties.

[0142] The thickness of the support also varies depending on the material constituting the support and is not particularly limited. From the perspective of improving the handleability of the sheet and the ease of laminating the gel layer, the thickness is preferably 0.1 mm or more, more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. From the perspective of reducing the bulk and softness of the sheet and improving its motion-following properties, the thickness is preferably 3 mm or less, more preferably 2 mm or less, more preferably 1.5 mm or less, even more preferably 1.2 mm or less, and even more preferably 1.0 mm or less. Furthermore, the thickness of the support is preferably 0.1 mm or more and 3 mm or less, more preferably 0.1 mm or more and 2 mm or less, more preferably 0.3 mm or more and 1.5 mm or less, even more preferably 0.3 mm or more and 1.2 mm or less, and even more preferably 0.5 mm or more and 1.0 mm or less.

[0143] The basis weight of the support also varies depending on the material constituting the support and is not particularly limited. From the perspective of improving the handleability of the sheet and the ease of lamination of the gel layer, it is preferably 10 g / m 2More than 30g / m 2 More than 50g / m 2 In addition, from the perspective of reducing the bulkiness and softness of the sheet and improving the action followability, 200 g / m 2 Below, more preferably 150g / m 2 Below, more preferably 120g / m 2 Furthermore, the weight of the support is preferably 10 g / m 2 Above 200g / m 2 Below, more preferably 30g / m 2 Above 150g / m 2 Below, more preferably 50g / m 2 Above 120g / m 2 the following.

[0144] From the perspective of improving the handleability of the sheet and the ease of laminating the gel layer, the bulkiness of the support in the MD (machine direction) is preferably 0.15 N or more, more preferably 0.20 N or more, even more preferably 0.25 N or more, and even more preferably 0.30 N or more. From the perspective of improving the followability of the movement, it is preferably 0.60 N or less, more preferably 0.50 N or less, even more preferably 0.45 N or less, even more preferably 0.38 N or less, and even more preferably 0.34 N or less. Furthermore, the bulkiness of the support (nonwoven fabric) in the MD is preferably 0.15 N or more and 0.60 N or less, more preferably 0.20 N or more and 0.50 N or less, even more preferably 0.25 N or more and 0.45 N or less, even more preferably 0.25 N or more and 0.34 N or less, even more preferably 0.30 N or more and 0.38 N or less, and even more preferably 0.30 N or more and 0.34 N or less.

[0145] Specifically, the bulkiness and softness of the support (non-woven fabric) in the MD direction can be measured by the method described in the examples. That is, under the conditions of 23°C and 50% RH, the support is cut into a size of 150 mm in the CD (cross direction) direction of the support and 30 mm in the MD direction. In order to make it into a ring with a diameter of about 45 mm, the two ends of the support in the CD direction are overlapped by 10 mm, and a stapler is used to fix the center of the CD direction of the overlapping part at two upper and lower locations near the two ends of the support in the MD direction. Using a tensile testing machine, the above-mentioned ring is placed in a cylindrical shape on a sample table, and a flat plate roughly parallel to the table is used to compress it from above at a compression speed of 10 mm / min. The maximum load at this time is measured and set as the bulkiness and softness of the support. In addition, the core of the stapler is fixed in a manner that is longer in the CD direction of the support (that is, in a manner parallel to the CD direction of the support).

[0146] In addition, the smaller the value of bulkiness, the higher the softness.

[0147] From the viewpoint of improving the operability of the sheet, the strength of the support at 50% elongation in the CD direction is preferably 0.3 N / 5 cm or more, more preferably 0.5 N / 5 cm or more, even more preferably 0.8 N / 5 cm or more, even more preferably 1.2 N / 5 cm or more, and from the viewpoint of improving the followability of the movement, it is preferably 4.5 N / 5 cm or less, more preferably 4.0 N / 5 cm or less, even more preferably 3.5 N / 5 cm or less, even more preferably 3 N / 5 cm or less, even more preferably 2.5 N / 5 cm or less, even more preferably less than 2 N / 5 cm. Moreover, the strength of the support at 50% elongation in the CD direction is preferably not less than 0.3 N / 5 cm and not more than 4.5 N / 5 cm, more preferably not less than 0.5 N / 5 cm and not more than 4.0 N / 5 cm, even more preferably not less than 0.5 N / 5 cm and not more than 3.5 N / 5 cm, even more preferably not less than 0.8 N / 5 cm and not more than 3 N / 5 cm, even more preferably not less than 0.8 N / 5 cm and not more than 2.5 N / 5 cm, even more preferably not less than 0.8 N / 5 cm and less than 2 N / 5 cm, and even more preferably not less than 1.2 N / 5 cm and less than 2 N / 5 cm.

[0148] From the perspective of improving the handleability of the sheet, the stretch recovery rate of the support at 50% extension in the CD direction is preferably 50% or more, more preferably 55% or more, even more preferably 60% or more, and even more preferably 70% or more. Furthermore, from the perspective of improving the followability of the sheet, it is preferably 85% or less, even more preferably 80% or less, and even more preferably 75% or less. Furthermore, the stretch recovery rate of the support at 50% extension in the CD direction is preferably 50% or more and 85% or less, even more preferably 55% or more and 80% or less, even more preferably 60% or more and 75% or less, and even more preferably 70% or more and 75% or less.

[0149] Furthermore, a larger value of the elongation recovery rate at 50% elongation indicates a stronger restoring force.

[0150] Specifically, the strength at 50% elongation and the recovery rate of elongation at 50% elongation of the support can be measured by the methods described in Examples.

[0151] The MD direction of the support refers to the machine direction (MD) during the manufacture of the nonwoven fabric, etc., that forms the support material. Furthermore, for example, when the nonwoven fabric is rolled in the form of a raw sheet, or when it is unrolled from a rolled state, it refers to the direction in which the nonwoven fabric is unrolled. On the other hand, the CD direction refers to the width direction (CD) perpendicular to the MD direction. In the case of the raw sheet, it refers to the axial direction of the roll.

[0152] The body-attaching sheet of the present invention is preferably applied and used so that the CD direction of the support body constituting the body-attaching sheet of the present invention corresponds to the direction of the body's greatest movement at the attachment site, specifically, the direction of body bending or twisting. More specifically, examples thereof include the twisting direction in the case of the neck and the bending direction in the case of the elbow or knee.

[0153] Furthermore, when a nonwoven fabric is cut into a predetermined size to form a support for a body-attaching sheet, it is preferred that the CD direction be aligned with the longitudinal direction of the body-attaching sheet, and the MD direction be aligned with the width direction of the body-attaching sheet. Generally speaking, the stress generated when a nonwoven fabric is stretched is stronger in the MD direction than in the CD direction. For example, when attaching a body-attaching sheet to the neck, the sheet is attached so that the long side of the sheet is parallel to the circumferential direction of the neck. It is believed that if the nonwoven fabric is configured as described above, the CD direction of the nonwoven fabric will be configured in the direction of greater movement during the left and right twisting movements of the neck that are common in daily life. This will effectively absorb the stress generated by the neck movement in the sheet, and the sheet's ability to follow the movement of the sheet will be improved. In other words, by attaching the body-attaching sheet so that the direction of greater body movement is parallel to the CD direction of the nonwoven fabric, the stress generated in the sheet during body movement can be absorbed, and the sheet's ability to follow the movement of the sheet will be excellent.

[0154] As mentioned above, the stress generated when stretching a nonwoven fabric is generally stronger in the MD direction than in the CD direction. Therefore, the orientation (MD direction, CD direction) of the nonwoven fabric constituting the body attachment sheet can be determined by measuring the stress when the nonwoven fabric is stretched in the longitudinal direction and the stress when stretched in the transverse direction (for example, measuring the strength at 50% elongation). By comparing the longitudinal and transverse stresses, it can be determined that the direction with the larger value is the MD direction, and the direction with the smaller value is the CD direction.

[0155] (Layer consisting of support and gel layer)

[0156] From the viewpoint of improving the sustainability of the cooling effect, the basis weight of the layer consisting of the support and the gel layer (hereinafter also referred to as the "laminated body") constituting the body-adhering sheet is 1000 g / m 2 Above, preferably 1050g / m 2 More than 1100 g / m 2 More preferably, 1150g / m 2 More than 1200 g / m 2 More than 1250 g / m 2 In addition, from the perspective of improving the adhesion to the body (skin) and the ability to follow the movements, the weight is 2600 g / m 2 Below, preferably 2400g / m 2 Below, more preferably 2200g / m 2 Below, more preferably 2100g / m 2 Below, more preferably 2000g / m 2 Below, more preferably 1500g / m2 Furthermore, the weight of the layer consisting of the support and the gel layer is 1000 g / m 2 Above 2600g / m 2 Below, preferably 1050g / m 2 Above 2400g / m 2 Below, more preferably 1100g / m 2 Above 2200g / m 2 Below, more preferably 1150g / m 2 Above 2100g / m 2 Below, more preferably 1200g / m 2 Above 2000g / m 2 Below, more preferably 1250g / m 2 Above 1500g / m 2 the following.

[0157] In the structure of the present invention, if the grammage of the laminate is large, the bulkiness and softness tend to increase; if the grammage of the laminate is small, the bulkiness and softness tend to decrease. Therefore, the bulkiness and softness can also be adjusted by the grammage of the laminate.

[0158] From the perspective of improving the handleability of the sheet, the bulkiness of the layer comprising the support and gel layer constituting the body-adhering sheet is 0.15 N or greater, preferably 0.20 N or greater. Furthermore, from the perspective of improving movement-following properties, it is 0.50 N or less, preferably 0.45 N or less, more preferably 0.40 N or less, and even more preferably 0.35 N or less. Furthermore, the bulkiness of the layer comprising the support and gel layer is 0.15 N or greater and 0.50 N or less, preferably 0.15 N or greater and 0.45 N or less, more preferably 0.15 N or greater and 0.40 N or less, even more preferably 0.15 N or greater and 0.35 N or less, and even more preferably 0.20 N or greater and 0.35 N or less.

[0159] Specifically, the bulkiness of a layer (laminate) composed of a support and a gel layer can be measured by the method described in the Examples. Specifically, a body patch sheet prepared with the support (nonwoven fabric) oriented in the CD direction as the longitudinal direction when viewed from above is cut under conditions of 23°C and 50% RH to a size of 80 mm in the longitudinal direction and 20 mm in the width direction perpendicular to the longitudinal direction. The release film is then removed and, with the support facing outward, the sheet is formed into a ring having a diameter of approximately 25 mm, such that the longitudinal ends of the sheet do not overlap and there is no gap (i.e., the longitudinal ends of the sheet are butted). The sheet is then stapled at two locations, one above and one below, near both ends of the sheet in the width direction, across the longitudinal ends of the sheet. Using a tensile testing machine, the ring was placed in a cylindrical position on a sample stand. A flat plate with a diameter of approximately 60 mm, roughly parallel to the stand, was compressed from above at a rate of 10 mm / min. The maximum load at this point was measured, which was used as the bulkiness of the layer consisting of the gel layer and support. Furthermore, the stapler core was fixed so that it was longer in the longitudinal direction of the sheet (i.e., parallel to the longitudinal direction of the sheet).

[0160] Furthermore, a smaller bulkiness value of the laminate indicates higher softness.

[0161] Furthermore, from the viewpoint of improving motion followability, the value y obtained by the following formula (1), which represents the relationship between the bulkiness a of the layer composed of the support and the gel layer and the ball number b in the rolling ball adhesion test of the gel layer, is preferably 0.38 or greater, more preferably 0.40 or greater, and even more preferably 0.43 or greater, and is preferably 1.00 or less, more preferably 0.80 or less, more preferably 0.70 or less, and even more preferably 0.60 or less. Furthermore, y is preferably 0.38 or greater and 1.00 or less, more preferably 0.40 or greater and 0.80 or less, more preferably 0.43 or greater and 0.70 or less, and even more preferably 0.43 or greater and 0.60 or less.

[0162] y=-a+0.04b……(1)

[0163] (In formula (1), a is the bulkiness (N), and b is the ball number in the rolling ball adhesion test.)

[0164] [Method for producing a body patch sheet]

[0165] The method for producing the body patch sheet of the present invention is not particularly limited, but it can be produced efficiently by a production method comprising the following steps (I) to (III) in sequence.

[0166] Step (I) is a step of preparing the following gel-forming composition:

[0167] The gel-forming composition contains the following components (A), (B1), (C1), and optionally (D):

[0168] (A)Water;

[0169] (B1) a water-soluble polymer having a carboxyl group and / or a salt thereof;

[0170] (C1) aluminum-containing compounds;

[0171] (D) polyvinyl alcohol, and

[0172] The content of the component (A) is 50% by mass or more and 85% by mass or less.

[0173] Step (II) is a step of filling the space between the support and the release film with the gel-forming composition to produce a laminated sheet having the support, the gel-forming composition layer, and the release film in this order.

[0174] Step (III) sealing the laminated sheet in a package and then crosslinking the gel-forming composition layer in the package

[0175] <Step (I)>

[0176] In step (I), a gel-forming composition is prepared, which contains the following components (A), (B1), (C1), and optionally (D):

[0177] (A)Water;

[0178] (B1) a water-soluble polymer having a carboxyl group and / or a salt thereof;

[0179] (C1) aluminum-containing compounds;

[0180] (D) polyvinyl alcohol, and

[0181] The content of the component (A) is 50% by mass or more and 85% by mass or less. The gel-forming composition, its preparation method, and preferred embodiments thereof are as described above.

[0182] <Step (II)>

[0183] In step (II), the gel-forming composition is filled between the support and the release film to produce a laminated sheet having the support, the gel-forming composition layer, and the release film in this order. The support and the release film are as described above.

[0184] Examples of methods for laminating the gel-forming composition between the support and release film include: sandwiching the gel-forming composition between the support and release film, then spreading it to the desired thickness using a Baker applicator, or applying the gel-forming composition to the release film to the desired thickness, followed by laminating the support. Alternatively, the support and release film may be positioned face-to-face and moved with conveyor rollers, with the gel-forming composition filled between the support and release film, and then fed out while being pressed with the rollers to form a laminated sheet. In this case, the gel-forming composition layer can be adjusted to the desired thickness by adjusting the distance between the two rollers.

[0185] The laminated sheet obtained in step (II) is cut into a desired size as needed and then supplied to step (III).

[0186] <Step (III)>

[0187] In step (III), the laminated sheet obtained in step (II) is sealed in a package, and then the gel-forming composition layer is cross-linked in the package, thereby forming a gel layer having a cross-linked structure.

[0188] The packaging used in step (III) preferably has moisture barrier properties. From the perspective of suppressing the release of volatile components within the packaging and improving storage stability, it is more preferably a gas barrier. Specific examples of such packaging include packaging comprising at least a layer composed of silicon, aluminum, or oxides thereof. From the perspective of improving moisture and gas barrier properties, as well as from the perspective of economic efficiency, such packaging preferably includes an aluminum layer.

[0189] The crosslinking conditions of the gel-forming composition layer are not particularly limited. From the viewpoint of improving the productivity of the gel-forming composition and the body-adhesive sheet having a gel layer composed of the composition, the crosslinking temperature is preferably 15 to 60°C, more preferably 15 to 30°C, and the crosslinking time (aging time) is preferably 1 to 21 days, more preferably 1 to 14 days.

[0190] The body patch sheet obtained by performing steps (I) to (III) can be made into a product in a state of being sealed in a package. The body patch sheet is taken out of the package, the release film is peeled off, and the gel layer is applied to the body for use.

[0191] The body patch sheet of the present invention is applied to the skin (excluding the scalp). While the body patch can be applied to any part of the body, it is particularly effective in areas with extensive and frequent movements, such as the neck, shoulders, and knee joints. The sheet provides excellent tracking performance and a long-lasting cooling effect.

[0192] Hereinafter, the present invention further discloses the following contents regarding the above-mentioned embodiment.

[0193] <1> A body-adhesive sheet comprising a support and a gel layer laminated on the support,

[0194] The gel layer contains the following components (A) to (C):

[0195] (A)Water;

[0196] (B) With COO - Water-soluble polymer based on

[0197] (C) aluminum atoms,

[0198] The content of the component (A) in the gel layer is 50% by mass or more and 85% by mass or less,

[0199] The bulkiness and softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following,

[0200] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH.

[0201] <2> The body patch sheet according to <1>, which has a crosslinked structure in which the component (B) is crosslinked via the component (C).

[0202] <3> A body-adhesive sheet comprising a support and a gel layer laminated on the support,

[0203] The gel layer is formed using a gel-forming composition containing the following components (A) to (C):

[0204] (A)Water;

[0205] (B) With COO - Water-soluble polymer based on

[0206] (C) aluminum atoms,

[0207] The content of the above-mentioned component (A) is 50% by mass or more and 85% by mass or less,

[0208] The bulkiness and softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following,

[0209] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH.

[0210] <4> A body attachment sheet as described in any one of <1> to <3>, wherein the value y obtained by the following formula (1) representing the relationship between the bulkiness a of the layer composed of the support body and the gel layer and the ball number b in the rolling ball adhesion test of the gel layer is greater than or equal to 0.38 and less than or equal to 1.00.

[0211] y=-a+0.04b……(1)

[0212] (In formula (1), a is the bulkiness (N), and b is the ball number in the rolling ball adhesion test.)

[0213] <5> The body-adhesive sheet according to <4>, wherein the value y obtained according to the above formula (1) is preferably 0.38 or more, more preferably 0.40 or more, even more preferably 0.43 or more, and preferably 1.00 or less, more preferably 0.80 or less, even more preferably 0.70 or less, and even more preferably 0.60 or less.

[0214] <6> The body-adhesive sheet according to any one of <1> to <5>, wherein the content of component (A) in the gel layer is preferably 55% by mass or more, more preferably 60% by mass or more, even more preferably 65% by mass or more, preferably 80% by mass or less, more preferably 78% by mass or less, even more preferably 77% by mass or less.

[0215] <7> The body-adhesive sheet according to any one of <1> to <6>, wherein when carboxymethyl cellulose and / or its salt is used as the component , the content of the component (B) in the gel layer is preferably 1% by mass or more, more preferably 1.5% by mass or more, even more preferably 2% by mass or more, even more preferably 2.3% by mass or more, even more preferably 2.5% by mass or more, preferably 5% by mass or less, even more preferably 4% by mass or less, even more preferably 3.8% by mass or less, even more preferably 3.4% by mass or less.

[0216] <8> The body-adhesive sheet according to any one of <1> to <7>, wherein when polyacrylic acid and / or its salt is used as the component (B), the content of the component (B) in the gel layer is preferably 3% by mass or more, more preferably 4% by mass or more, even more preferably 4.5% by mass or more, even more preferably 5% by mass or more, preferably 10% by mass or less, even more preferably 9% by mass or less, even more preferably 8% by mass or less, even more preferably 7% by mass or less.

[0217] <9> The body attachment sheet according to any one of <1> to <8>, wherein the content of component (C) in the above-mentioned gel layer is preferably 0.002 mass% or more, more preferably 0.003 mass% or more, even more preferably 0.004 mass% or more, even more preferably 0.0045 mass% or more, preferably 0.05 mass% or less, even more preferably 0.03 mass% or less, even more preferably 0.02 mass% or less, even more preferably 0.01 mass% or less, even more preferably 0.0080 mass% or less.

[0218] <10> The body-adhesive sheet according to any one of <1> to <9>, wherein the mass ratio [(B) / (C)] in the gel layer is preferably 200 or more, more preferably 300 or more, even more preferably 400 or more, preferably 800 or less, more preferably 700 or less, even more preferably 600 or less.

[0219] <11> The body attachment sheet according to any one of <1> to <10>, wherein the content of component (D) in the above-mentioned gel layer is preferably 2% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, preferably 18% by mass or less, more preferably 16% by mass or less, more preferably 15% by mass or less, further more preferably 12% by mass or less, and even more preferably 11% by mass or less.

[0220] <12> The body attachment sheet according to any one of <1> to <11>, wherein the mass ratio [(D) / (B)] in the gel layer is preferably 0.1 or more, more preferably 1 or more, even more preferably 2 or more, even more preferably 3 or more, preferably 7 or less, even more preferably 6 or less, even more preferably 5 or less, even more preferably 4 or less.

[0221] <13> The body-adhesive sheet according to any one of <1> to <12>, wherein the bulkiness of the layer composed of the support and the gel layer is preferably 0.20 or more, more preferably 0.45N or less, even more preferably 0.40N or less, and even more preferably 0.35N or less.

[0222] <14> The body-adhesive sheet according to any one of <1> to <13>, wherein the layer composed of the support and the gel layer preferably has a grammage of 1050 g / m 2 More than 1100 g / m 2 More preferably, 1150g / m 2 More than 1200 g / m 2 More than 1250 g / m 2 Above, 2600g / m 2 Below, preferably 2400g / m 2 Below, more preferably 2200g / m 2 Below, more preferably 2100g / m 2 Below, more preferably 2000g / m 2 Below, more preferably 1500g / m 2 the following.

[0223] <15> A body attachment sheet as described in any one of <1> to <14>, wherein the ball number of the gel layer in a rolling ball adhesion test conducted in accordance with JIS Z 0237: 2009 at an inclined plate angle of 30°, a temperature of 23°C, and 50% RH is preferably 16 or more, more preferably 18 or more, preferably 28 or less, further preferably 26 or less, and even more preferably 23 or less.

[0224] <16> A body attachment sheet as described in any one of <1> to <15>, wherein the loss tangent of the above-mentioned gel layer in the dynamic viscoelasticity measurement at a temperature of 25°C and a frequency of 0.1 Hz is preferably 0.15 or more, more preferably 0.20 or more, even more preferably 0.22 or more, even more preferably 0.25 or more, even more preferably 0.28 or more, preferably 0.70 or less, even more preferably 0.60 or less, even more preferably 0.58 or less, even more preferably 0.50 or less, even more preferably 0.35 or less.

[0225] <17> The body attachment sheet according to any one of <1> to <16>, wherein the bulkiness and softness of the support in the MD direction is preferably 0.15N or more, more preferably 0.20N or more, even more preferably 0.25N or more, even more preferably 0.30N or more, preferably 0.60N or less, even more preferably 0.50N or less, even more preferably 0.45N or less, even more preferably 0.38N or less, even more preferably 0.34N or less.

[0226] <18> The body attachment sheet as described in any one of <1> to <17>, wherein the strength of the support body at 50% elongation in the CD direction is preferably 0.3N / 5cm or more, more preferably 0.5N / 5cm or more, even more preferably 0.8N / 5cm or more, even more preferably 1.2N / 5cm or more, preferably 4.5N / 5cm or less, even more preferably 4.0N / 5cm or less, even more preferably 3.5N / 5cm or less, even more preferably 3N / 5cm or less, even more preferably 2.5N / 5cm or less, even more preferably less than 2N / 5cm.

[0227] <19> The body attachment sheet according to any one of <1> to <18>, wherein the stretch recovery rate of the support body when stretched 50% in the CD direction is preferably 50% or more, more preferably 55% or more, even more preferably 60% or more, even more preferably 70% or more, preferably 85% or less, even more preferably 80% or less, even more preferably 75% or less.

[0228] <20> A body-adhesive sheet comprising a support and a gel layer laminated on the support,

[0229] The gel layer is formed using a gel-forming composition comprising the following components (A), (B1), and (C1):

[0230] (A)Water;

[0231] (B1) a water-soluble polymer having a carboxyl group and / or a salt thereof;

[0232] (C1) an aluminum-containing compound,

[0233] The content of the above-mentioned component (A) is 50% by mass or more and 85% by mass or less,

[0234] The bulkiness and softness of the layer including the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following,

[0235] The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted in accordance with JIS Z0237:2009 under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH.

[0236] <21> A body-adhesive sheet as described in <20>, wherein the amount of component (C1) contained in the above-mentioned gel-forming composition is preferably 0.005 mass% or more, more preferably 0.01 mass% or more, even more preferably 0.02 mass% or more, preferably 0.2 mass% or less, more preferably 0.1 mass% or less, more preferably 0.06 mass% or less, and even more preferably 0.04 mass% or less.

[0237] <22> A body attachment sheet as in <20> or <21>, wherein the content of the above-mentioned component (B1) relative to the content of the component (C1) (mass ratio [(B1) / (C1)]) is preferably 25 or more, more preferably 50 or more, even more preferably 60 or more, preferably 250 or less, further preferably 150 or less, more preferably 120 or less, further more preferably 100 or less, and further preferably 95 or less.

[0238] <23> A body attachment sheet as described in any one of <20> to <22>, wherein the above-mentioned (C1) is one or more selected from aluminum hydroxide, magnesium aluminum hydroxide, sodium aluminate, aluminum sulfate, potassium aluminum sulfate, ammonium aluminum sulfate, aluminum carbonate, aluminum nitrate, aluminum chloride, magnesium (meta)aluminum silicate, aluminum acetate, aluminum lactate, aluminum stearate, aluminum myristate, aluminum glycinate, aluminum benzoate, and aluminum chlorohydrate of allantoin, more preferably containing magnesium (meta)aluminum silicate, and even more preferably aluminum hydroxide and magnesium (meta)aluminum silicate.

[0239] <24> A body attachment sheet as described in any one of <1> to <23>, which has an outer shape in which the length in the first direction when viewed from above is longer than the length in the second direction perpendicular thereto, and is arranged in such a way that the CD direction of the support body constituting the body attachment sheet becomes the length direction of the body attachment sheet.

[0240] <25> A method for using a body-attaching sheet according to any one of <1> to <24>, wherein the body-attaching sheet is attached so that the CD direction of the support constituting the body-attaching sheet becomes the direction of bending or twisting of the body.

[0241] [Example]

[0242] Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to the scope of the Examples. In addition, various measurements in the present Examples were performed by the following methods.

[0243] Examples 1 to 9, Comparative Examples 1 to 5

[0244] (Preparation of Gel-Forming Composition)

[0245] Gel-forming compositions were prepared according to the formulations shown in Tables 1-3. Specifically, a solution of methylparaben and menthol dissolved in propylene glycol with heating, and an aqueous solution containing polyvinyl alcohol and a pH adjuster were prepared. The aqueous solution containing polyvinyl alcohol and a pH adjuster was placed in a kneading machine, and then all other ingredients were added and mixed to prepare the gel-forming composition. The amounts listed in Tables 1-3 are the active ingredient amounts (mass %) of each component.

[0246] (Manufacturing of Body Adhesion Sheets)

[0247] Under the conditions listed in Tables 1 to 3, the gel-forming composition was sandwiched between a nonwoven fabric support and a polypropylene release film. The gel-forming composition layer was then stretched using a Baker applicator to adjust the thickness of the layer. This yielded a sheet comprising the nonwoven fabric, the gel-forming composition layer, and the release film laminated in this order. The nonwoven fabric used was the one listed in Table 4, produced by a known method.

[0248] The sheet was cut into a 12.5 cm × 8.5 cm rectangle so that the CD direction of the nonwoven fabric became the longitudinal direction of the sheet when viewed from above, and sealed in an aluminum pillow (120 mm × 170 mm, manufactured by AS ONE CORPORATION). After aging under the conditions described in Tables 1 to 3, a cross-linking reaction of the gel-forming composition layer was carried out to produce a body-attachment sheet having a three-layer structure of a nonwoven fabric, a gel layer, and a release film in this order.

[0249] The obtained body patch sheet was used to perform evaluation according to the following method. The results are shown in Tables 1 to 3.

[0250] <Weight average molecular weight of component (D)>

[0251] The weight-average molecular weight of the powdered raw material of component (D) was determined by measuring an aqueous solution prepared by dissolving the powdered raw material in water using size exclusion chromatography (SEC) under the following conditions. Furthermore, the weight-average molecular weight of component (D) in the gel layer was determined by measuring an extract from the gel layer using size exclusion chromatography (SEC) under the following conditions. The weight-average molecular weights of component (D) listed in the table are the weight-average molecular weights of component (D) in the powdered raw material and the gel layer.

[0252] <SEC measurement conditions>

[0253] Measuring device: "SEC-8320" manufactured by TOSOH CORPORATION

[0254] Eluent: 0.2 mol / L phosphate buffer / acetonitrile = 9 / 1 (v / v%)

[0255] Guard column: "PWXL (6 mm × 4 cm)" manufactured by TOSOH CORPORATION

[0256] Analytical column: G4000PWxL+G2500PWxL (7.8 mm × 30 cm) manufactured by TOSOH Corporation

[0257] Flow rate: 1mL / min

[0258] Column temperature: 40°C

[0259] Injection volume: 100 μL

[0260] Sample volume: 1 mg / mL

[0261] Molecular weight conversion standard: PEO manufactured by TOSOH CORPORATION (SE-150 (977,000), SE-70 (580,000), SE-30 (394,000), SE-15 (143,000), SE-8 (101,000), SE-2 (21,000))

[0262] Detector: RI

[0263] <Method for measuring the thickness of the gel layer>

[0264] The thickness of the gel layer was measured by the following method.

[0265] 1. Thickness of the layer consisting of the support and the gel layer

[0266] First, the thickness of the center portion of the layer consisting of the support and gel layer (hereinafter also referred to as support+gel) of each body patch sheet was measured using a constant pressure thickness gauge PG-11 (measuring head diameter 35 mm, manufactured by Teclock).

[0267] 2. Thickness of the support

[0268] Then, the gel was removed from the support+gel by alkali treatment and dried. Only the support was taken out and the thickness of the support was measured using a constant pressure thickness gauge PG-11 (manufactured by Teclock) in the same manner as in 1.

[0269] 3. Thickness of gel layer

[0270] The thickness of the gel layer was determined by subtracting the thickness of the support measured in step 2 from the thickness of the support + gel measured in step 1.

[0271] <Method for measuring bulkiness in a layer consisting of a support and a gel layer>

[0272] The bulkiness and softness of the layer consisting of the support and the gel layer of each body attachment sheet were measured under the conditions of 23°C and 50% RH. Each body attachment sheet was taken out from the aluminum pillow, and 80 mm was quickly cut out in the longitudinal direction of the sheet and 20 mm was cut out in the width direction perpendicular to the longitudinal direction. The peeling film was peeled off, and a ring with a diameter of about 25 mm was formed with the support on the outside. The ends of the sheet in the longitudinal direction were fixed at two locations, one above and one below, using a stapler. At this time, the ends of the sheet in the longitudinal direction were not overlapped and there was no gap (that is, the ends of the sheet in the longitudinal direction were butted together). In addition, the core of the stapler was fixed near the ends of the sheet in the width direction at two locations, one above and one below, in a direction that was longer in the longitudinal direction of the sheet (that is, in a manner parallel to the longitudinal direction of the sheet) and spanned the ends of the sheet in the longitudinal direction. Using a tensile testing machine (tensile compression testing machine "STA-1150" manufactured by Orientec), the above-mentioned ring is placed in a cylindrical shape in the center of the sample table, and is compressed from above at a compression speed of 10 mm / min using a flat plate with a diameter of about 60 mm roughly parallel to the table. The maximum load at this time is measured and set as the bulkiness and softness of the layer composed of the gel layer and the support body.

[0273] In addition, when the length of the cut sheet (hereinafter also referred to as sheet segment) is less than 80 mm in the longitudinal direction, a new sheet segment is cut with a width of 20 mm in the width direction perpendicular to the longitudinal direction of the sheet from the same body attachment sheet or other body attachment sheets made by the same manufacturing method. The new sheet segment is fixed to the end of the insufficiently long sheet segment at the upper and lower parts using a stapler, and the length of the sheet segment in the longitudinal direction is made 80 mm. Then, the bulkiness and softness are measured using the same method as above.

[0274] <Method for measuring bulkiness in the MD direction of a support>

[0275] The bulkiness and softness of the support for each example was measured under conditions of 23°C and 50% RH. A 150 mm section was cut from the nonwoven fabric serving as the support in the CD direction and a 30 mm section was cut in the MD direction. The ends were stapled together at two locations, one above and one below, to form a ring with a diameter of approximately 45 mm. The ends of the support in the CD direction overlapped by 10 mm. The stapler core was positioned so that it was longer in the CD direction of the nonwoven fabric (i.e., parallel to the CD direction of the support). The ring was secured near the center of the overlapping portion in the CD direction at two locations, one above and one below, near the ends of the support in the MD direction. Using a tensile testing machine ("STA-1150" manufactured by Orientec), the ring was placed in a cylindrical position in the center of a sample stand. A flat plate with a diameter of approximately 60 mm, roughly parallel to the stand, was used to compress the ring from above at a rate of 10 mm / min. The maximum load at this point was measured and used as the bulkiness and softness of the support.

[0276] <Method for measuring the strength of a support at 50% elongation in the CD direction>

[0277] The strength of the support at 50% elongation in the CD direction for each example was measured under conditions of 23°C and 50% RH. A 150 mm section in the CD direction and a 50 mm section in the MD direction were cut from the nonwoven fabric serving as the support. Using a tensile testing machine (Tensilon, manufactured by Orientec), the specimen was secured between two chucks (the distance between the chucks (grip gap) was 100 mm). The chucks were then separated at a tensile speed of 500 mm / min, and the maximum load measured before the specimen was stretched 50 mm was determined. This maximum load was defined as the strength of the support at 50% elongation.

[0278] <Method for measuring the recovery rate of support at 50% elongation in the CD direction>

[0279] The recovery rate of the support at 50% elongation in the CD direction for each example was measured under conditions of 23°C and 50% RH. A 150 mm section of the nonwoven fabric serving as the support was cut out in the CD direction and a 50 mm section in the MD direction. Using a tensile testing machine (Tensilon, manufactured by Orientec), the specimen was secured between two chucks (the distance between the chucks (grip gap) was 100 mm). Starting from the position with this 100 mm gap, the specimen was stretched at a speed of 500 mm / min to a position 50 mm from the starting point, i.e., the 50% elongation point. The specimen was then returned to the starting point at the same speed. Measure the length L0 obtained by subtracting the length of the clamping gap when the tensile stress of the sample piece during stretching becomes 0.05N from the length of the clamping gap at the 50% elongation position at this time (150mm), and the length L1 obtained by subtracting the length of the clamping gap when the tensile stress of the sample piece during recovery becomes 0.05N from the length of the clamping gap at the 50% elongation position (150mm). The value calculated according to the following formula is set as the recovery rate of the support body at 50% elongation in the CD direction.

[0280] Elongation recovery rate at 50% elongation (%) = (L1 / L0) × 100

[0281] <Ball Adhesion Test>

[0282] The rolling ball adhesion test of the gel layer of each body patch sheet was conducted in accordance with JIS Z0237:2009 at a 30° tilt plate angle, 23°C, and 50% relative humidity. Each body patch sheet was removed from the aluminum pillow, the release film removed, and then immediately placed in a rolling ball adhesion tester for the test. The maximum ball number remaining on the gel layer's adhesive area for at least 5 seconds is shown in Tables 1-3.

[0283] Loss tangent (tanδ)

[0284] The loss tangent (tan δ) of the gel layer of each body patch sheet was measured using a rheometer ("Physica MCR 301" manufactured by Anton Paar Corporation). A 25 mm diameter circle was cut from each body patch sheet, and the nonwoven fabric side was secured to the rheometer's sample section (25 mm diameter parallel plates) using double-sided tape. The release film was then removed, and the loss modulus and storage modulus of the gel layer were measured under the following conditions. The loss tangent (tan δ) was calculated from these values. Multiple measurements (three or more) were performed, and the average value was used.

[0285] [Measurement conditions]

[0286] Normal force: 1N

[0287] Gap interval: 1-2mm

[0288] Gel layer mass: 0.4-1.5g

[0289] Measuring frequency: 0.1Hz

[0290] Strain: 2%

[0291] Temperature: 25°C

[0292] <Motion tracking>

[0293] Each body-attaching sheet was removed from the aluminum pillow and, immediately after peeling off the release film, attached to the side of the neck (right side of the neck) of a professional sensory evaluator, with the long side of the sheet parallel to the circumference of the neck. Ten seconds after attachment, the professional sensory evaluator twisted the neck 10 times to measure the area of the portion of the body-attaching sheet that was lifted from the neck, i.e., the portion that was peeled off from the neck. The ratio (%) of the area of the peeled portion of the sheet to the total area of the body-attaching sheet was calculated and evaluated according to the following criteria. The higher the evaluation value, the better the adhesion immediately after attachment.

[0294] In addition, the evaluations by professional sensory evaluators in this example were all performed by three sensory evaluators, and the evaluation values shown in the table are the average values of the three sensory evaluators.

[0295] [Evaluation Criteria]

[0296] 7: The area ratio of the portion where the sheet peeled off was 5% or less.

[0297] 6: The area ratio of the portion where the sheet is peeled is more than 5% and 10% or less.

[0298] 5: The area ratio of the portion where the sheet peeled off was more than 10% and 20% or less.

[0299] 4: The area ratio of the portion where the sheet is peeled is more than 20% and 30% or less.

[0300] 3: The area ratio of the portion where the sheet is peeled is more than 30% and 40% or less.

[0301] 2: The area ratio of the portion where the sheet is peeled is more than 40% and not more than 50%.

[0302] 1: The area ratio of the portion where the sheet is peeled exceeds 50%.

[0303] Furthermore, from the perspective of practicality, it is preferable that the evaluation of the motion followability is 4.0 or higher.

[0304] <Sustainability of cooling effect>

[0305] Each body patch sheet was removed from the aluminum pillow and immediately after peeling off the release film, it was applied to the side of the neck (right side of the neck) of the professional sensory evaluators with the long side of the sheet parallel to the circumferential direction of the neck. Afterwards, the cooling effect was measured using a thermistor probe 180 minutes after the sheet was applied, while the subjects continued their daily lives indoors. Figure 1 The skin temperature of the five sites a to e in the body patch sheet 1 was measured. The sustainability of the cooling effect was evaluated by calculating the skin temperature change ΔT (° C.) using the following formula and the average value of the five measured sites.

[0306] Skin temperature change ΔT (°C) = (skin temperature 180 minutes after application of the body patch sheet) - (skin temperature before application of the body patch sheet)

[0307] In addition, the evaluations by professional sensory evaluators in this example were all performed by three sensory evaluators, and the evaluation values shown in the table are the average values of the three sensory evaluators.

[0308] Regarding the sustainability of the cooling effect, from a practical point of view, it is preferable that ΔT is -1.2°C or less.

[0309] <Burden on the Skin>

[0310] Each body patch sheet was removed from the aluminum pillow, the release film removed, and then immediately applied to the forearm of a professional sensory evaluator with the long side of the sheet perpendicular to the circumference of the forearm. The burden on the skin upon removal 30 minutes after application was evaluated on a 5-point scale. The evaluations by the professional sensory evaluators in this example were performed by three panelists, and the values shown in the table are the average of these three panelists' results.

[0311] [Evaluation Criteria]

[0312] 5: No burden on the skin.

[0313] 4: It doesn’t put too much pressure on the skin.

[0314] 3: I feel a slight burden on my skin.

[0315] 2: I feel a little burden on my skin.

[0316] 1: Feeling of a burden on the skin.

[0317] Furthermore, from the perspective of practicality, the evaluation of burden on the skin is preferably 3.0 or higher.

[0318] [Table 1]

[0319]

[0320] *(a) Bulkiness in the evaluation results indicates the bulkiness of the layer consisting of the support and the gel layer.

[0321] [Table 2]

[0322]

[0323] *(a) Bulkiness in the evaluation results indicates the bulkiness of the layer consisting of the support and the gel layer.

[0324] [Table 3]

[0325]

[0326] *(a) Bulkiness in the evaluation results indicates the bulkiness of the layer consisting of the support and the gel layer.

[0327] [Table 4]

[0328]

[0329] Tables 1 to 3 show that the body patch sheet of this example, despite its high water content, exhibits excellent movement-following properties when applied to the neck, a part of the body subject to frequent and extensive movement. Consequently, the cooling effect is also excellently sustained. Furthermore, Examples 1 and 3 also demonstrate that even sheets with moderate initial tack exhibit excellent movement-following properties, maintain a good cooling effect, and reduce the burden on the skin when the sheet is removed.

[0330] On the other hand, the body-adhering sheet of this comparative example cannot satisfy both the motion-following property and the sustainability of the cooling effect.

[0331] [Industrial Applicability]

[0332] According to the present invention, a sheet for body attachment can be provided which can achieve high movement tracking even if the sheet has a large gram weight and contains water gel, and has excellent sustainability of cooling effects, etc., especially in areas with large and frequent movements such as joints such as the neck, shoulders, and knees.

Claims

1. A sheet material for body attachment, wherein: The body-adhesive sheet comprises a support and a gel layer laminated on the support, and The gel layer contains the following components (A) to (C): (A)Water, (B) With COO - Water-soluble polymers based on (C) aluminum atoms, The content of the component (A) in the gel layer is 50% by mass or more and 85% by mass or less, The bulkiness and softness of the layer composed of the support and the gel layer is 0.15N or more and 0.50N or less, and the gram weight is 1000g / m 2 Above 2600g / m 2 the following, The gel layer has a ball number of 14 or more and 30 or less in a rolling ball adhesion test conducted under the conditions of an inclined plate angle of 30°, a temperature of 23° C., and 50% RH in accordance with JIS Z0237:2009.

2. The body-adhesive sheet according to claim 1, wherein: The support is non-woven fabric.

3. The body-adhesive sheet according to claim 1 or 2, wherein: The support has a strength of 0.5 N / 5 cm or more and 4.0 N / 5 cm or less at 50% elongation in a CD direction.

4. The body-adhesive sheet according to any one of claims 1 to 3, wherein It further contains polyvinyl alcohol (D).

5. The body-adhesive sheet according to any one of claims 1 to 4, wherein: The mass ratio (B) / (C) of the component (B) to the component (C) is 200 or more and 800 or less.

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