Laminated sheet

Abstract

To provide a laminated sheet which is usable as a skin design sheet with more natural makeup applicability.SOLUTION: A laminated sheet includes an adhesive layer, and a surface resin layer, where among contact angles to water by a static drop method of a wettability testing method according to JIS R 3257, of the surface resin layer, a difference (A60s)-(A1s) between a contact angle (A1s) after 1 second from dropping of water and a contact angle (A60s) after 60 seconds from the dropping of water is -6.0° or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a laminated sheet. [Background technology]

[0002] Skin design sheets that are applied to the skin are known (see, for example, Patent Document 1). Examples of skin design sheets include tattoo stickers and skin concealing sheets. Tattoo stickers are sheets with various designs printed on a base material. Tattoo stickers are sold, for example, at variety stores, sporting and music event venues, amusement parks, and the like, and are used to enhance the atmosphere. Skin concealing sheets are sheets with a base material that has been pre-colored with a predetermined color by screen printing or the like. Skin concealing sheets are used, for example, to conceal discoloration such as scratches or blemishes on the skin. Users select a skin design sheet that matches their skin color.

[0003] The skin design sheet comprises, for example, a release sheet, an adhesive layer, a base layer, and a protective sheet in this order in the thickness direction. The skin design sheet is applied to the user's skin by peeling the release sheet from the adhesive layer, attaching the adhesive layer to the skin, and then peeling the protective sheet from the base layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-70654 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a skin design sheet is applied to the skin, the cosmetic adhesion of the skin design sheet is insufficient when makeup is applied, and the boundary between the bare skin and the skin design sheet becomes noticeable, so there is a need to reduce the sense of incongruity in appearance. The object of the present disclosure is to provide a laminated sheet that can be used as a skin design sheet with a more natural cosmetic adhesion. [Means for solving the problem]

[0006] The laminate sheet of the present disclosure includes an adhesive layer and a surface resin layer, and the surface resin layer has a contact angle of 1 second after water is dropped by the sessile drop method of the wettability test method in accordance with JIS R3257 (A 1s ) and the contact angle (A 60s ) and the difference (A 60s )-(A 1s ) is greater than -6.0°. [Effects of the Invention]

[0007] According to the present disclosure, a laminated sheet can be provided that can be used as a skin-design sheet that allows cosmetic application to appear more natural. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view of a laminated sheet. [Figure 2] FIG. 2 is a cross-sectional view of the laminated sheet. [Figure 3] FIG. 3 is a cross-sectional view of the laminated sheet. [Figure 4] FIG. 4 is an explanatory diagram of the surface shape indicated by Ssk of the surface resin layer that constitutes the laminate sheet. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described in detail. The present disclosure can be implemented in many different forms, and should not be construed as being limited to the description of the embodiments exemplified below. For clarity of explanation, the drawings may show the width, thickness, shape, etc. of each layer more schematically than in the embodiments, but these are merely examples and do not limit the interpretation of the present disclosure. In this specification and each drawing, elements similar to those already described with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0010] In the present disclosure, when multiple upper limit candidates and multiple lower limit candidates are listed for a certain parameter, the numerical range of the parameter may be constructed by combining any one upper limit candidate with any one lower limit candidate. Examples of such parameters include physical properties, component content, and layer thickness. As an example, the following statement will be explained: "Parameter B is preferably A1 or greater, more preferably A2 or greater, and even more preferably A3 or greater. Parameter B is preferably A4 or less, more preferably A5 or less, and even more preferably A6 or less." In this example, the numerical range of parameter B may be A1 or greater and A4 or less, A1 or greater and A5 or less, A1 or greater and A6 or less, A2 or greater and A4 or less, A2 or greater and A5 or less, A2 or greater and A6 or less, A3 or greater and A4 or less, A3 or greater and A5 or less, or A3 or greater and A6 or less.

[0011] In this specification, each of the components (for example, resin materials and additives such as colorants) appearing in the following description may be used alone or in combination of two or more types.

[0012] [Laminated sheet] The laminate sheet of the present disclosure includes an adhesive layer and a surface resin layer.

[0013] Specific examples of the laminate sheet of the present disclosure will be described below with reference to the drawings. The laminate sheet 1 shown in FIG. 1 includes an adhesive layer 20 and a surface resin layer 10. The surface resin layer 10 has a first surface 1a and a second surface 1b opposite the first surface 1a. The second surface 1b faces the adhesive layer 20. The first surface 1a is the surface opposite the second surface 1b. In this example, the surface resin layer 10 is a base layer. In this example, one or both of the adhesive layer 20 and the surface resin layer 10 may be colored with a colorant to a desired color, such as a skin color. A printed layer may be provided on either or both surfaces of the base layer.

[0014] The laminate sheet 1 shown in Fig. 2 includes an adhesive layer 20, a base layer 30, and a surface resin layer 10. In this way, the laminate sheet 1 may include the adhesive layer 20, the base layer 30, and the surface resin layer 10 in this order in the thickness direction. In this example, at least one layer selected from the adhesive layer 20, the base layer 30, and the surface resin layer 10 may be colored with a colorant to a desired color, such as a skin color. A printed layer may be provided on either or both surfaces of the base layer.

[0015] 3 further includes a release sheet 40 on the surface of the adhesive layer 20 opposite to the surface facing the base layer 30. In this way, the laminate sheet 1 may include the release sheet 40, the adhesive layer 20, the base layer 30, and the surface resin layer 10 in this order in the thickness direction.

[0016] The laminate sheet may further include a protective sheet (not shown) on the surface (first surface) of the surface resin layer opposite to the surface (second surface) facing the adhesive layer. The laminate sheet may include an adhesive layer, an optional base layer, a surface resin layer, and a protective sheet in this order in the thickness direction, or may include a release sheet, an adhesive layer, an optional base layer, a surface resin layer, and a protective sheet in this order in the thickness direction.

[0017] The laminate sheet may optionally include a release sheet, an adhesive layer, a substrate layer, a receiving layer on which an image is formed, and optionally a protective sheet, in this order. In this example, the receiving layer corresponds to the surface resin layer. The laminate sheet may optionally include a release sheet, an adhesive layer, a substrate layer, a receiving layer on which an image is formed, a protective layer, and optionally a protective sheet, in this order. In this example, the protective layer corresponds to the surface resin layer. In these examples, an image of a desired color, such as skin color, is formed on the receiving layer using a colorant such as a dye.

[0018] In one embodiment, the laminate sheet of the present disclosure is in the form of a long strip, and FIGS. 1 to 3 are cross-sectional views perpendicular to the longitudinal direction of, for example, a laminate sheet 1.

[0019] <Surface resin layer> The laminate sheet of the present disclosure includes a surface resin layer. When the laminate sheet is attached to an adherend, the surface resin layer constitutes the surface layer located farthest from the adherend. If the laminate sheet is provided with a protective sheet, the protective sheet is peeled off.

[0020] The surface resin layer has a first surface and a second surface opposite to the first surface, the second surface being the surface of the surface resin layer facing the adhesive layer, and the first surface being the surface of the surface resin layer opposite to the surface facing the adhesive layer.

[0021] The surface resin layer has a contact angle with water, which is the contact angle after 1 second has elapsed since the water was dropped (A 1s ) and the contact angle (A 60s ) and the difference (A 60s )-(A 1s ) is greater than -6.0°.

[0022] In this specification, the contact angle with water is measured by the sessile drop method of the wettability test method in accordance with JIS R3257, and is the contact angle (A 1s ) and the contact angle (A 60s ) are measured. This allows the contact angle with water to be measured under conditions similar to those when the laminated sheet is attached to the skin. Details of the conditions for measuring the contact angle with water are described in the Examples section.

[0023] The difference in the contact angle with water measured under the above conditions over time (from 1 second to 60 seconds) (A 60s )-(A 1s A surface resin layer having a refractive index of -6.0° or higher tends to have stable water retention and tends to improve the applicability of liquid cosmetics. Specific examples of liquid cosmetics include lotions, emulsions, and liquid foundations.

[0024] The above difference (A 60s )-(A 1s) is −6.0° or more, preferably −3.5° or more, and more preferably −2.5° or more. 60s )-(A 1s ) is preferably 1.0° or less, more preferably 0.8° or less, and even more preferably 0.0° or less. 60s )-(A 1s ) is, for example, between -6.0° and 1.0°. 60s )-(A 1s A surface resin layer with a difference of -6.0° or more tends to have a water retention capacity similar to that of bare skin, so liquid cosmetics adhere well and produce a natural finish. 60s )-(A 1s ) is less than -6.0°, the surface resin layer is likely to lose its ability to retain water, making it difficult for liquid cosmetics to adhere well and resulting in a natural finish.

[0025] The surface resin layer is measured by the contact angle (A 1s The contact angle (A ) may be less than 90° or may be 90° or more. 1s A surface resin layer with a contact angle (A) of less than 90° is hydrophilic and tends to be poorly suited for cosmetic application. 1s A surface resin layer with a contact angle (A ) of 90° or more is hydrophobic and tends to be suitable for applying cosmetics. From the viewpoint of the suitability for applying liquid cosmetics, the surface resin layer should have a contact angle (A ) of 90° or more after 1 second has elapsed since water was dropped on it. 1s ) is preferably less than 90°.

[0026] The surface resin layer preferably has a three-dimensional surface texture as described below.

[0027] The surface resin layer preferably has an Ssk (skewness) of −0.5 or more, as defined in ISO25178-2:2012.

[0028] Ssk is one of the three-dimensional surface texture parameters defined by the ISO and is an index that indicates the degree of deviation of the height distribution from the mean plane. When Ssk is 0, the surface shape is symmetrical with respect to the mean plane. When Ssk is greater than 0, the surface shape is biased downward from the mean plane, i.e., toward the lower height side, and the areas near the peaks of the convexities tend to be sharp and thin. When Ssk is less than 0, the surface shape is biased upward from the mean plane, i.e., toward the higher height side, and the areas near the peaks of the convexities tend to be blunt and thick. "Symmetrical with respect to the mean plane" can also be referred to as "normal distribution."

[0029] The shape tendency of the surface shape indicated by Ssk will be explained using Figure 4. Figure 4 is a schematic diagram of when Ssk exceeds 0 (1-1) and when Ssk is less than 0 (1-2). Ssk being less than 0 means that the surface shape of the surface resin layer is biased upward relative to the average plane, and the areas near the tops of the convex portions tend to be blunt and thick. In Figure 4, the "average plane" is the average level plane corresponding to the horizontal line, and "above the average plane" is also the upper side in Figure 4.

[0030] The Ssk of the surface resin layer is -0.5 or more, preferably -0.45 or more, more preferably -0.4 or more, and even more preferably -0.3 or more. Ssk is, for example, -0.5 or more and 4.0 or less. A surface resin layer with an Ssk of -0.5 or more tends to have water retention similar to that of bare skin, allowing liquid cosmetics to spread well and achieving a natural finish. On the other hand, a surface resin layer with an Ssk of less than -0.5 is prone to have reduced water retention, resulting in poor spread of liquid cosmetics and difficulty in achieving a natural finish.

[0031] The difference in the contact angle with water (A 60s )-(A 1s) is within the above range, and a surface resin layer having an Ssk of -0.5 or more tends to have more stable water retention and tends to have better application suitability for liquid cosmetics. A surface resin layer having an Ssk within the above-mentioned preferred range has, for example, a moderately crushed and rounded shape near the tops of the convex portions present below the average surface, and a gently pointed shape near the lowest surface of the concave portions below, and it is believed that such shapes contribute to the stability of water retention.

[0032] The surface resin layer is 10 mm -2 Over 400mm -2 It is preferable to have the following Spd (peak density): Spd is defined in ISO25178-2:2012.

[0033] Spd is one of the three-dimensional surface texture parameters defined by the ISO and is an effective index for evaluating contact between objects. Spd indicates the number of peaks per unit area (here, only peaks larger than a predetermined size are counted). Unless otherwise specified, the predetermined size is set to a height that is 5% of the maximum amplitude of the contour surface. Spd is calculated by dividing the number of peaks included in the contour surface by the projected area of ​​the contour surface.

[0034] The surface resin layer Spd is preferably 100 mm -2 More than 200mm, preferably -2 or more, preferably 350 mm -2 The following is the result.

[0035] The difference in the contact angle with water (A 60s )-(A 1s ) is within the above range, and Spd (peak density) is 100 mm -2 Over 400mm -2The surface resin layer shown below has a moderate unevenness in addition to stable water retention, which tends to improve the suitability of cushion foundation for application. Cushion foundation is somewhere between powder foundation and liquid foundation, and is used by soaking a sponge-like puff (cushion) in the liquid foundation.

[0036] In this specification, Ssk and Spd are measured using a shape analysis laser microscope. Ssk and Spd are measured by attaching and fixing a laminated sheet to a Bioskin plate (manufactured by Viewlux Co., Ltd., product number P001-001) having an uneven surface so that the adhesive layer is in contact with the plate, and then scanning the surface shape of the first side of the surface resin layer using a shape analysis laser microscope. This allows Ssk and Spd to be measured under conditions similar to those when the laminated sheet is attached to the skin. Details of the measurement conditions for Ssk and Spd are described in the Examples section.

[0037] The water contact angle, Ssk, and Spd can be adjusted, for example, by appropriately selecting and using the materials described below as the material for the surface resin layer and by subjecting the surface resin layer to a shaping treatment such as embossing. Specifically, with regard to embossing, the water contact angle and the like can be adjusted by the surface shape of the embossing plate and shaping sheet used in embossing, the pressure, temperature, and time during embossing, etc.

[0038] The surface resin layer has a printable surface or a printable layer, or both a printable layer and a printable layer. Examples of printable printing methods include gravure printing, offset printing, and screen printing. Other examples include printing methods using various printers, such as thermal transfer, inkjet, and electrophotographic methods, which are excellent in on-demand printing. Among these, thermal transfer is the most suitable.

[0039] It may also be a layer formed by thermal transfer, such as the protective layer or receiving layer described below, that is, a transfer layer transferred by a thermal transfer process from a thermal transfer sheet having a transfer layer such as a protective layer and a receiving layer.

[0040] (base material layer) In one embodiment, the surface resin layer is a substrate layer. The substrate layer may be, for example, a resin film formed from a resin material, such as polyurethane, polyester, polyamide, polyimide, polyolefin, vinyl resin, styrene resin, acrylic resin, or cellulose resin.

[0041] As the substrate layer, for example, a stretchable substrate is preferably used. Examples of the stretchable substrate include the above-mentioned resin films, and among the above-mentioned resin films, a urethane film is preferred.

[0042] The stretchable substrate preferably has an elongation percentage of 30% or more and 100% or less so that it can follow the expansion and contraction of the adherend when the laminate sheet is attached to the adherend. The elongation percentage of the stretchable substrate is the elongation percentage obtained by a test method in accordance with JIS K 7127:1999. The elongation percentage is expressed by the following formula (1): Elongation (%) = 100 × (L - L0) / L0 (1)

[0043] In formula (1), L is the length at which the stretchable substrate breaks when it is pulled at a speed of 200 mm / min using a tensile tester. L0 in formula (1) is the length of the stretchable substrate before being pulled by the tensile tester. A Tensilon universal material testing machine can be used as the tensile tester.

[0044] The substrate layer may contain additives. Examples of additives include ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The substrate layer may contain a colorant, if necessary. The substrate layer may contain a colorant to match the color tone of the laminated sheet to a desired color, such as skin color. Examples of colorants include pigments and dyes.

[0045] The thickness of the substrate layer is preferably 3 μm or more, more preferably 5 μm or more. A laminate sheet having such a substrate layer can, for example, suppress the occurrence of wrinkles when the sheet is applied and improve workability. The thickness of the substrate layer is preferably 80 μm or less, more preferably 60 μm or less, even more preferably 40 μm or less, and particularly preferably 30 μm or less. A laminate sheet having such a substrate layer can, for example, suppress the user's discomfort after application of the sheet.

[0046] A printing layer may be provided on the base layer. The printing layer may be a layer for adjusting the color tone of the laminated sheet to a desired color, such as a skin color. The printing layer contains a colorant. Examples of the colorant include pigments and dyes.

[0047] In one embodiment, the laminate sheet of the present disclosure may include the above-described base material layer between the adhesive layer and the surface resin layer. In this case, the surface resin layer may be, for example, a protective layer or a receiving layer described below.

[0048] (protective layer) In one embodiment, the surface resin layer is a protective layer. The laminate sheet of the present disclosure may include, for example, an adhesive layer, a base layer, and a protective layer in this order, or an adhesive layer, a base layer, a receiving layer on which an image is formed, and a protective layer in this order. The receiving layer will be described later.

[0049] The protective layer may be made of a resin material, such as polyester, polyamide, polyurethane, polycarbonate, vinyl resin, styrene resin, acrylic resin, acrylic polyol resin, cellulose resin, phenoxy resin, epoxy resin, silicone-modified versions of these resins, ultraviolet-absorbing resins, and ionizing radiation-curable resins.

[0050] Examples of polyesters include polyethylene terephthalate and polyethylene naphthalate. Examples of vinyl resins include vinyl chloride-vinyl acetate copolymer, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polyvinyl acetal, and polyvinyl pyrrolidone. Examples of cellulose resins include ethyl cellulose, hydroxyethyl cellulose, ethylhydroxycellulose, methyl cellulose, and cellulose acetate.

[0051] Examples of ionizing radiation curable resins include resins obtained by crosslinking and curing a radical polymerizable polymer or a radical polymerizable oligomer by irradiating it with ionizing radiation. Specific examples include resins obtained by adding a photopolymerization initiator to a radical polymerizable polymer or a radical polymerizable oligomer as needed, and polymerizing and crosslinking the resulting polymer or oligomer by irradiating it with an electron beam or ultraviolet light.

[0052] The content of the resin material in the protective layer is preferably 80% by mass or more, and more preferably 85% by mass or more, relative to the total mass of the protective layer, which can provide, for example, sufficient durability to the protective layer.

[0053] The protective layer may contain additives. Examples of additives include ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The protective layer may contain a colorant, if necessary. The protective layer may contain a colorant to match the color tone of the laminated sheet to a desired color, such as skin color. Examples of colorants include pigments and dyes.

[0054] The content of the additive in the protective layer is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, relative to the total mass of the protective layer. The content of the additive in the protective layer is, for example, 1% by mass or more and 20% by mass or less.

[0055] The thickness of the protective layer is preferably 0.1 μm or more, more preferably 0.5 μm or more, even more preferably 1 μm or more, and preferably 20 μm or less, more preferably 10 μm or less, even more preferably 5 μm or less. Such a protective layer can, for example, impart sufficient protective function to the laminate sheet. The thickness of the protective layer is, for example, 0.1 μm or more and 20 μm or less.

[0056] The protective layer can be formed, for example, by applying a coating liquid containing the above-mentioned materials to a base layer or the like by a known means such as roll coating, reverse roll coating, gravure coating, reverse gravure coating, bar coating, or rod coating, and then drying the coating.

[0057] The protective layer can be formed, for example, by preparing a thermal transfer sheet having a protective layer, superimposing the thermal transfer sheet on a substrate film or the like corresponding to the substrate layer, and transferring the protective layer onto the substrate film or the receiving layer on which an image is formed by a thermal transfer process.

[0058] (receptor layer) In one embodiment, the surface resin layer is a receiving layer on which an image is formed. The laminate sheet of the present disclosure may include, for example, an adhesive layer, a substrate layer, and a receiving layer on which an image is formed, in this order. The receiving layer is a layer for receiving dyes and the like transferred from the thermal transfer sheet. For example, when forming an image using a thermal transfer printer, it is desirable to provide the receiving layer on the substrate layer. The image may be, for example, an image for adjusting the color tone of the laminate sheet to a desired color, such as skin color.

[0059] The material constituting the receiving layer may be, for example, a resin material. Examples of the resin material include polyolefin, vinyl resin, styrene resin, acrylic resin, polyester, polyamide, polyimide, polyurethane, polycarbonate, cellulose resin, and ionomer resin. Examples of the polyolefin include polyethylene and polypropylene. Examples of the vinyl resin include polyvinyl chloride, polyvinyl acetate, and vinyl chloride-vinyl acetate copolymer. Examples of the polyester include polyethylene terephthalate and polyethylene naphthalate. The resin material constituting the receiving layer is preferably a vinyl resin, and more preferably a vinyl chloride-vinyl acetate copolymer.

[0060] The content of the resin material in the receiving layer is preferably 70% by mass or more, and more preferably 80% by mass or more, relative to the total mass of the receiving layer, which can provide the receiving layer with sufficient durability, for example.

[0061] The receiving layer may contain additives such as ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents.

[0062] The content of the additive in the receiving layer is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, based on the total mass of the receiving layer. The content of the additive in the receiving layer is, for example, 1% by mass or more and 30% by mass or less.

[0063] The receiving layer may be a white receiving layer. The white receiving layer may, for example, comprise a primer layer containing a white pigment and a transparent receiving layer in this order. Examples of white pigments include silica, titanium oxide, titanium dioxide, zinc oxide, cerium oxide, titanium mica, muscovite, white carbon, calcium carbonate, barium sulfate, alumina white, and talc. The use of a white receiving layer can suppress reflected light from discolored areas on the adherend, enhance the concealment of the discolored areas, and improve the reproducibility of the desired skin color. The transparent receiving layer may contain light-scattering particles.

[0064] A hiding layer may be further provided on the primer layer containing the white pigment. The hiding layer may contain a metal pigment. Examples of metal pigments include particles of aluminum, nickel, chromium, brass, tin, brass, bronze, zinc, silver, platinum, gold, and oxides thereof, as well as glass particles subjected to metal vapor deposition. Among these, aluminum pigments are preferred from the viewpoint of transferability and glossiness of the hiding layer. The aluminum pigment may be either a leafing type or a non-leafing type, but non-leafing types are preferred from the viewpoint of transferability and glossiness of the hiding layer.

[0065] The thickness of the receiving layer is preferably 0.5 μm or more, more preferably 1 μm or more, and preferably 20 μm or less, more preferably 10 μm or less. This can improve the density of the thermally transferred image formed on the receiving layer, for example. The thickness of the receiving layer is, for example, 0.5 μm or more and 20 μm or less.

[0066] The receiving layer can be formed, for example, by applying a coating liquid containing the above-mentioned materials to a base layer or the like by known means such as roll coating, reverse roll coating, gravure coating, reverse gravure coating, bar coating, or rod coating, and then drying the coating.

[0067] When a receiving layer is provided on a substrate layer, the solvent contained in the coating liquid may melt and damage the substrate layer, or may denature or deform the substrate layer during the process of applying and drying a coating liquid for the receiving layer on the substrate layer. In this case, it is preferable to transfer the receiving layer onto the substrate layer by thermal transfer. The receiving layer may be provided on the substrate layer in advance, or may be provided by thermal transfer onto the substrate layer during image formation.

[0068] <Adhesive layer> The laminated sheet of the present disclosure includes an adhesive layer. The adhesive layer is formed using, for example, a pressure-sensitive adhesive. A pressure-sensitive adhesive is a material that has adhesive properties at room temperature and can be attached to an adherend by applying pressure. For example, even when an adherend attached to the adhesive layer is peeled off, the adhesive layer retains practical adhesive strength.

[0069] Examples of adhesives include acrylic adhesives, urethane adhesives, silicone adhesives, rubber adhesives, vinyl alkyl ether adhesives, polyester adhesives, polyamide adhesives, and fluorine-based adhesives. The adhesive may contain a solvent. For example, either a water-based or solvent-based solvent can be used. For medical use, it is preferable to select an adhesive that causes little skin rash or irritation to the skin, and for example, acrylic adhesives and urethane adhesives are preferred.

[0070] The adhesive layer may contain additives. Examples of additives include ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The adhesive layer may contain a colorant, if necessary. The adhesive layer may contain a colorant to match the color tone of the laminated sheet to a desired color, such as skin color. Examples of colorants include pigments and dyes.

[0071] The adhesive strength of the adhesive layer is preferably 5000 gf / 50 mm or less, more preferably 100 gf / 50 mm or more and 5000 gf / 50 mm or less. If the adhesive strength is 5000 gf / 50 mm or less, there is little risk of damaging the adherend (particularly human or animal skin) when the sheet is applied incorrectly or removed during replacement. If the adhesive strength is 100 gf / 50 mm or more, for example, adhesive strength to the adherend (particularly human or animal skin) can be ensured, and peeling of the sheet due to sweating, movement, etc. can be prevented.

[0072] The adhesive strength between the release sheet and the adhesive layer may be, for example, 2 gf / 50 mm or more, 4 gf / 50 mm or more, or 50 gf / 50 mm or less, or 30 gf / 50 mm or less. If the adhesive strength is 2 gf / 50 mm or more, peeling of the release sheet during storage or transportation can be suppressed. If the adhesive strength is 50 gf / 50 mm or less, the release sheet can be easily peeled off, for example, when using the skin-design sheet. The adhesive strength is measured in accordance with the method (180° peel) described in JIS Z 0237:2009.

[0073] The thickness of the adhesive layer is preferably 3 μm or more, more preferably 5 μm or more, and preferably 40 μm or less, more preferably 30 μm or less. The thickness of the adhesive layer is, for example, 3 μm or more and 40 μm or less.

[0074] <Release sheet> The laminate sheet of the present disclosure may include a release sheet removably disposed on the adhesive layer. Examples of release sheets include release paper with at least one release-treated surface on a paper substrate, and resin films with at least one release-treated surface on a resin substrate. Examples of release treatments include release treatments using silicone resin-based release agents, alkyd resin-based release agents, long-chain alkyl compound-based release agents, and fluororesin-based release agents. Examples of resin films include resin films formed from resin materials such as polyolefin, vinyl resin, styrene resin, acrylic resin, fluororesin, polyester, and polyamide.

[0075] The thickness of the release sheet is preferably 50 μm or more, more preferably 100 μm or more, and preferably 300 μm or less, more preferably 200 μm or less. The thickness of the release sheet is, for example, 50 μm or more and 300 μm or less.

[0076] <Protective sheet> The laminate sheet of the present disclosure may include a protective sheet releasably provided on the surface resin layer. Examples of the protective sheet include a low-density polyethylene (LDPE) sheet and a polypropylene (PP) sheet. The protective sheet may include, for example, a weak adhesive layer. The weak adhesive layer may be formed using an acrylic weak adhesive or a urethane weak adhesive. The thickness of the protective sheet is, for example, 10 μm or more and 200 μm or less.

[0077] [Applications of laminated sheets] An example of the use of the laminate sheet of the present disclosure will be described below. In one embodiment, the laminate sheet can be used as a skin design sheet (skin sheet) to be attached to the skin. Examples of skin design sheets include skin concealing sheets and tattoo stickers.

[0078] In one embodiment, a skin design sheet can be produced from the laminate sheet. For example, multiple skin design sheets may be produced from the laminate sheet. For example, a roll-shaped laminate sheet may be cut to produce a sheet-shaped laminate sheet in the form of a product.

[0079] The skin design sheet can be stuck to skin having spots, birthmarks, freckles, wrinkles, sagging skin, pores, scars, acne scars, burn scars, discoloration due to skin diseases, etc., so that the adhesive layer comes into contact with the skin, thereby concealing these and making them less noticeable.

[0080] [Laminated sheet manufacturing method] The laminated sheets of the present disclosure can be made, for example, by a thermal transfer process. A long substrate film corresponding to the substrate layer is prepared. The substrate film and thermal transfer sheet are set in a thermal transfer printer. A dye-sublimation thermal transfer printer is suitable as the thermal transfer printer, as it has excellent color reproducibility and gradation.

[0081] The thermal transfer sheet comprises a substrate and a transferable receiving layer, a dye layer, and optionally a protective layer, which are provided in surface order on one side of the substrate. The receiving layer is a transparent layer that receives the dye transferred from the thermal transfer sheet. Examples of the dye layer include a yellow dye layer, a magenta dye layer, and a cyan dye layer. The dye layer contains a binder resin and a sublimable dye. Known materials can be used for the yellow dye layer, the magenta dye layer, and the cyan dye layer. Details of the receiving layer and the protective layer are as described above. If a receiving layer is already provided on the substrate film, it is not necessary for the thermal transfer sheet to have a receiving layer, or for the receiving layer to be transferred as described below.

[0082] The thermal transfer printer sandwiches the substrate film and thermal transfer sheet between a thermal head and platen roll, heating the thermal transfer sheet. The thermal head heats the receptor layer of the transfer mold, transferring the receptor layer onto the substrate film. Next, the thermal head sequentially heats the yellow dye layer, magenta dye layer, and cyan dye layer, for example, based on the data of the skin design sheet, transferring the dyes to the receptor layer transferred onto the substrate film to form an image. This makes it easy to match the color of the laminated sheet to the user's skin color. If necessary, the protective layer of the thermal transfer sheet is then heated and transferred onto the receptor layer on which the image has been formed. Here, the receptor layer, or (if a protective layer is provided) the protective layer, corresponds to the surface resin layer described above.

[0083] If necessary, the surface resin layer is subjected to a shaping treatment such as embossing to form a concave-convex shape on the surface resin layer. The shaping treatment can adjust the water contact angle, Ssk, and Spd of the surface resin layer. For example, an embossing plate or a shaping sheet can be used in the embossing treatment. The embossing plate and the shaping sheet can be used without any particular limitation as long as they can impart the above-mentioned surface shape. The surface shape of the embossing plate and the shaping sheet and the surface shape shaped by them are almost the opposite shapes.

[0084] The long laminate sheet is cut parallel to the width direction of the laminate sheet using a cutter in a thermal transfer printer to obtain a single laminate sheet. If necessary, a protective sheet may be attached to the surface resin layer of the single laminate sheet.

[0085] Next, the laminated sheet is cut into the shape of the product form of the skin design sheet using a known cutting device. For example, when the laminated sheet is viewed from above, the laminated sheet is punched into a circular shape. The shape is not particularly limited.

[0086] In this manner, a skin design sheet having a desired shape can be produced. In the above method, the adhesive layer may be provided on the substrate film before the thermal transfer process. In this case, it is preferable to provide a release sheet on the adhesive layer. Alternatively, the adhesive layer may be provided on the substrate layer after the thermal transfer process.

[0087] Although a method for producing a laminate sheet by a thermal transfer process has been described, the method for producing a laminate sheet of the present disclosure is not limited to the above method. For example, a laminate sheet may be produced by sequentially forming each layer.

[0088] The present disclosure relates to, for example, the following [1] to [7]. [1] A laminated sheet comprising an adhesive layer and a surface resin layer, The contact angle of the surface resin layer with water measured by the sessile drop method of the wettability test method conforming to JIS R3257 is the contact angle (A 1s ) and the contact angle (A 60s ) and the difference (A 60s )-(A 1s ) is -6.0° or more. [2] The laminate sheet according to [1], wherein the surface resin layer has an Ssk (skewness) of −0.5 or more as defined in ISO25178-2:2012. [3] The surface resin layer has an Spd (peak density) of 10 to 400 mm as defined in ISO25178-2:2012. -2 The laminate sheet according to [1] or [2], [4] The laminate sheet according to any one of [1] to [3], wherein the laminate sheet comprises a substrate layer as the surface resin layer, or the laminate sheet further comprises a substrate layer between the adhesive layer and the surface resin layer. [5] The laminate sheet according to any one of [1] to [4], wherein the surface resin layer has a printable surface or a printable layer, or both a printable layer and a printable layer. [6] a protective sheet provided releasably on the surface resin layer, and / or a release sheet releasably provided on the adhesive layer; The laminate sheet according to any one of [1] to [5], further comprising: [7] The laminate sheet according to any one of [1] to [6], which is a skin-design sheet. [Example]

[0089] The laminate sheet of the present disclosure will be described in more detail with reference to examples, but the laminate sheet of the present disclosure is not limited to these examples.

[0090] [Example] An acrylic adhesive was applied to a release paper (Sumika Kakoshi Co., Ltd., SLB-110WT, thickness 170 μm) and dried to form an adhesive layer with a thickness of 10 μm. A 20 μm thick urethane film (Okura Kogyo Co., Ltd., NES85, elastic substrate) was attached to the adhesive layer. In this way, a sheet comprising release paper, adhesive layer, and urethane film in this order was produced.

[0091] A thermal transfer sheet was prepared, comprising a 4.5 μm-thick polyethylene terephthalate film (Toray Industries, Inc.) and a 2 μm-thick transfer layer made of the transfer layer resin listed in Table 1. The transfer layer from this thermal transfer sheet was thermally transferred onto the urethane film of the sheet under the following transfer conditions. Synthetic leather release paper "DN-TP (registered trademark) series" (Dai Nippon Printing Co., Ltd.) was prepared, and the synthetic leather release paper was placed on the transfer layer of the sheet after the thermal transfer. The sheet was heated using a laminating machine "Fujipla LPD3226N" (Hisago Co., Ltd.) to form irregularities on the surface of the transfer layer to achieve the surface shape (Ssk, Spd) listed in Table 1. In this way, laminate sheets of Examples 1 to 8 each comprising a release paper, adhesive layer, urethane film, and transfer layer were obtained.

[0092] (Resin of transfer layer) Resin 1: Vinyl chloride-vinyl acetate copolymer (Nissin Chemical Industry Co., Ltd., Solvine (registered trademark) CNL) Resin 2: Polyurethane resin (Dai-ichi Kogyo Seiyaku Co., Ltd., Superflex (registered trademark) 210)

[0093] (Transfer conditions) Thermal head: KGT-217-12MPL20 (Kyocera Corporation) Heating element average resistance: 31915Ω Print density in the main scanning direction: 300 dpi Sub-scanning direction print density: 300 dpi ·Applied power: 0.12W / dot 1 line cycle: 5 msec. ·Printing start temperature: 40℃

[0094] [Comparative Example] A thermal transfer sheet was prepared, comprising a 2 μm-thick transfer layer made of the transfer layer resin listed in Table 1 on a 4.5 μm-thick polyethylene terephthalate film (Toray Industries, Inc.). The transfer layer from this thermal transfer sheet was thermally transferred onto the urethane film of the sheet under the following transfer conditions. Synthetic leather release paper "DN-TP (registered trademark) series" (Dai Nippon Printing Co., Ltd.) was prepared, and the synthetic leather release paper was placed on the transfer layer of the sheet after the thermal transfer. The sheet was then heated using a laminating machine "Fujipla LPD3226N" (Hisago Co., Ltd.) to form irregularities on the surface of the transfer layer to achieve the surface shape (Ssk, Spd) listed in Table 1. In this way, laminated sheets of Comparative Examples 1 and 2, each comprising a release paper, an adhesive layer, a urethane film, and a transfer layer, were obtained.

[0095] [evaluation] <Cosmetic adhesion evaluation> A Bioskin plate (Viewlux Co., Ltd., product number P001-001) was prepared. The release paper was removed from the laminated sheets obtained in the Examples and Comparative Examples, and the laminated sheets were attached and fixed to the Bioskin plate. A liquid foundation (Lasting Cover Foundation, manufactured by Cezanne) and a powder foundation (Essence BB Pact, manufactured by Cezanne) were applied to the surface of the laminated sheet, and the makeup application was evaluated. The evaluation was conducted on the following four-point scale.

[0096] (Evaluation content) A: The makeup spreads evenly on the skin without any unevenness, and there is no discomfort. B: There is some unevenness in application, but the makeup spreads evenly on the skin and there is no discomfort. C: The application is uneven and the makeup is not evenly spread on the skin, causing a slight discomfort. D: The application is uneven and the makeup is not evenly distributed on the skin, causing discomfort.

[0097] <Contact angle measurement> The contact angle with water was measured using a portable contact angle meter "PCA-1" (manufactured by Kyowa Interface Science Co., Ltd.) by the sessile drop method of the wettability test method in accordance with JIS R3257.

[0098] (Measurement conditions) Water used for measurement: Ion-exchanged water Amount of water dropped: 2μL ·Measurement temperature: 20℃ Lens field of view: Standard

[0099] The contact angle (A 1s ) and the contact angle (A 60s ) were measured at five arbitrary points on the first surface, and the average value was taken as the contact angle with water. The contact angles immediately after dropping water were measured at five arbitrary points on the horizontally placed dried coating film, and the average value was taken as the water contact angle. Here, the contact angle values ​​at the five arbitrary points were automatically calculated by pressing the "Measure" button. The contact angles with water for Examples 1 to 8 and Comparative Examples 1 and 2 were as shown in Table 1 below.

[0100] <Surface shape (Ssk and Spd)> The laminated sheets obtained in the examples and comparative examples were attached and fixed to a SUS plate after peeling off the release paper, and the surface shape of the laminated sheets, Ssk (skewness) and Spd (peak density), were measured using a shape analysis laser microscope under the following conditions in accordance with ISO25178-2:2012.

[0101] (Measurement conditions) Shape analysis laser microscope: VK-X150 (control unit) / VK-X160 (measurement unit), Keyence Corporation Objective lens: 20x Laser wavelength: 658nm Measurement mode: Surface profile mode Measurement pitch: 0.13 μm Measurement range: Rectangular (952μm x 1297μm) ·Measurement quality: high precision

[0102] [Table 1] [Explanation of symbols]

[0103] 1. Laminated sheet 10 Surface resin layer 20 Adhesive layer 30 Base material layer 40 Peel-off sheet

Claims

1. A laminated sheet comprising an adhesive layer and a surface resin layer, The contact angle of the surface resin layer with water measured by the sessile drop method of the wettability test method in accordance with JIS R3257 is the contact angle (A １ｓ ) and the contact angle (A ６０ｓ ) and the difference (A ６０ｓ ) - (A １ｓ ) is −6.0° or more.

2. The laminate sheet according to claim 1, wherein the surface resin layer has an Ssk (skewness) defined in ISO25178-2:2012 of −0.5 or more.

3. The surface resin layer has an Spd (peak density) as defined in ISO25178-2:2012 of 10 to 400 mm ２ The laminate sheet according to claim 1, wherein

4. The laminate sheet according to claim 1 , wherein the laminate sheet comprises a substrate layer as the surface resin layer, or the laminate sheet further comprises a substrate layer between the adhesive layer and the surface resin layer.

5. The laminate sheet according to claim 1 , wherein the surface resin layer has a printable surface or a printable layer, or both a printable surface and a printable layer.

6. a protective sheet releasably provided on the surface resin layer, and / or a release sheet releasably provided on the adhesive layer; The laminate sheet of claim 1 further comprising:

7. The laminate sheet according to any one of claims 1 to 6, which is a skin design sheet.

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