Skin-like design sheet

Abstract

The present invention provides a skin-like design sheet that suppresses peeling of the adhesive portion when printing skin-like design images on a printer, and also reduces pain when peeling the adhesive portion from the skin. [Solution] The textured sheet S has a release sheet 10 and a sealing portion 20. The release sheet 10 has a first base material 11 and a release layer 12 that are laminated in order. The sealing portion 20 is provided on the release layer 12 so as to be peelable from the release sheet 10. The sealing portion 20 has a laminated structure in which an adhesive layer 21 and a second base material 22 are laminated in this order from the release sheet 10 side. The peeling force of the sealing portion 20 from the release sheet 10 is 0.07 N / 20 mm or more and 5.0 N / 20 mm or less. The water contact angle of the surface of the release layer 12 exposed by peeling the sealing portion 20 from the release sheet 10 is 80° or more and 109° or less. The adhesive force of the adhesive layer 21 of the sealing portion 20 to the SUS plate is 1.0 N / 20 mm or more and 10.0 N / 20 mm or less.

Description

Technical Field

[0001] The present disclosure relates to a skin design sheet.

Background Art

[0002] Skin design sheets that are used by attaching them to the skin, such as tattoo sheets and body paint sheets, are becoming popular. Skin design sheets with various patterns printed on them are sold at variety stores, sports and music event venues, amusement parks, etc., and are used to enhance the atmosphere.

[0003] A skin design sheet is a laminated product of a release sheet and a seal portion. The seal portion is peeled off from the release sheet, and the adhesive layer of the seal portion is attached to the skin for use. Also, a half-cut process is applied to the seal portion, and a frame portion of a desired shape surrounded by the half-cut is peeled off from the release sheet and attached to the skin. When the adhesive force of the seal portion (frame portion) is large, the pain when peeling the seal portion from the skin becomes strong, so it is necessary to suppress the adhesive force.

[0004] It is required to print highly artistic images on demand on the seal portion. As described above, when the adhesive force of the seal portion is suppressed, there is a problem that the seal portion (frame portion) is peeled off during printing of the skin design image by the printer, resulting in running defects or jams. Also, even in a skin design sheet without half-cutting, there is a problem that the tip of the seal peels up from the release sheet due to some trigger during conveyance of the skin design sheet in the printer, causing a so-called paper jam.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] This disclosure aims to provide a skin-like design sheet that suppresses transport problems and sticker peeling when printing skin-like design images on a printer, and also reduces pain when peeling the sticker from the skin. [Means for solving the problem]

[0007] [1] A textured sheet having a release sheet and a sealing portion, The release sheet has a first substrate and a release layer that are laminated in order, and the seal portion is provided on the release layer so as to be removable from the release sheet. The sealing portion has a laminated structure in which the adhesive layer and the second substrate are laminated in this order from the release sheet side. The peel force obtained from the seal portion from the release sheet according to the test method in accordance with JIS K 6854-3:1999 (Adhesives - Test methods for peel strength - Part 3: T-type peel) is 0.07 N / 20 mm or more and 5.0 N / 20 mm or less. The water contact angle of the surface of the release layer exposed by peeling the seal portion from the release sheet is 80° or more and 109° or less in a wettability test conducted by the drop method in accordance with JIS R 3257:1999. The adhesive layer of the sealing portion is a textured sheet having an adhesive strength to a SUS plate of 1.0 N / 20 mm or more and 10.0 N / 20 mm or less, as obtained by a test method compliant with JIS Z0237:2022.

[0008] [2] The textured sheet according to [1], wherein the thickness of the first substrate of the release sheet is 10 μm or more and 200 μm or less, and the thickness of the release layer is 0.05 μm or more and 5 μm or less.

[0009] [3] The textured sheet according to [1] or [2], wherein the thickness of the adhesive layer is 5 μm or more and 50 μm or less, and the thickness of the second substrate is 5 μm or more and 150 μm or less.

[0010] [4] The textured sheet according to any one of [1] to [3], wherein the surface portion of the textured sheet on the second substrate side is a surface portion that can be printed by an on-demand printing method.

[0011] [5] The textured sheet according to [4], wherein the on-demand printing method is at least one printing method selected from the group consisting of a thermal transfer method, an inkjet method, and an electrophotographic method.

[0012] [6] The textured sheet according to [4], having a receptive layer on the surface of the textured sheet on the second substrate side that can be printed by the on-demand printing method.

[0013] [7] The seal portion is divided into a segment portion and a remaining portion by a half-cut, the skin texture sheet according to any one of [1] to [6].

[0014] [8] The skin-pattern sheet according to any one of [1] to [7], wherein a detection portion is formed on the release sheet, the sealing portion, or both the release sheet and the sealing portion.

[0015] [9] The textured sheet according to any one of [1] to [8], wherein the opacity (YB / YW) obtained by a test method in accordance with Method B of JIS K5600-4-1, measured from either the release sheet or the sealing portion, or from the sealing portion side of the textured sheet, is 2.0% or more and 90% or less.

[0016]

[10] A textured sheet according to any one of [1] to [9], wherein the opacity (YB / YW) obtained by a test method in accordance with Method B of JIS K5600-4-1, measured from the surface side opposite to the release sheet of the sealing portion, is 5% or more and 40% or less.

[0017]

[11] The seal part is the skin design sheet according to any one of [1] to

[10] , in which the stress at 50% strain in the stress-strain curve obtained by a tensile test (specimen width: 10 mm) conforming to JIS-K 7127:1999 is 5 MPa or more and 160 MPa or less.

[0018]

[12] The hiding ratio (YB / YW) obtained by a test method conforming to Method B of JIS K5600-4-1, measured from the surface side of the seal part on the opposite side of the release sheet, is 5% or more and 40% or less, The skin design sheet according to any one of [1] to

[11] , in which the hiding ratio (YB / YW) obtained by a test method conforming to Method B of JIS K5600-4-1 of the skin design sheet is 30% or more and 99% or less.

[0019]

[13] The skin design sheet according to any one of [1] to

[12] , in which the second base material is polyvinyl chloride (PVC) or polyurethane.

[0020]

[14] The skin design sheet according to any one of [1] to

[13] , in which the stiffness in the printer conveyance direction of the skin design sheet, measured by the Gurley method of the stiffness test method conforming to JIS L 1085:1998, is 300 mgf or more and 1200 mgf or less.

[0021]

[15] The skin design sheet according to any one of [1] to

[14] , in which irregularities with an arithmetic mean height Sa measured in accordance with ISO 25178-2:2012 are provided on the surface of the first base material opposite to the release layer, and the arithmetic mean height Sa is 0.1 μm or more and 2.0 μm or less.

[0022]

[16] The skin design sheet according to any one of [1] to

[15] , in which irregularities with an arithmetic mean height Sa measured in accordance with ISO 25178-2:2012 are provided on the surface of the first base material on the release layer side, and the arithmetic mean height Sa is 0.01 μm or more and 0.30 μm or less.

Advantages of the Invention

[0023] According to the present disclosure, conveyance troubles and seal peeling during printing of skin design images on a printer can be suppressed. In addition, the pain when peeling the seal portion from the skin can be reduced.

Brief Description of the Drawings

[0024] [Figure 1] It is a cross-sectional view of the skin design sheet. [Figure 2] It is a cross-sectional view of the skin design sheet. [Figure 3] It is a plan view of the skin design sheet. [Figure 4] It is a cross-sectional view of the skin design sheet. [Figure 5] It is a plan view of the skin design sheet. [Figure 6] It is an enlarged plan view of the skin design sheet.

Embodiments for Carrying Out the Invention

[0025] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings and the like. The present disclosure can be implemented in many different modes and is not to be construed as limited to the description of the embodiments exemplified below. Also, the drawings may be schematically represented with respect to the width, thickness, etc. of each part compared to the actual mode for clearer explanation, but this is merely an example and does not limit the interpretation of the present disclosure.

[0026] FIG. 1 is a cross-sectional view of a skin design sheet S according to an embodiment of the present disclosure. The skin design sheet S has an integrated release sheet 10 and a seal portion 20, and the seal portion 20 is provided so as to be peelable from the release sheet 10. A desired image is formed on the surface portion 25 (the surface opposite to the release sheet 10) of the seal portion 20 by a printer. The printer can be of an on-demand printing method and uses a thermal transfer method, an inkjet method, an electrophotographic method, or the like.

[0027] The release sheet 10 has a laminated structure in which a release layer 12 is laminated on a first base material 11 (release sheet base material). The sealing portion 20 has a laminated structure in which an adhesive layer 21 and a second base material 22 (sealing base material) are laminated in that order from the release layer 12 side of the release sheet 10.

[0028] If the image formation method in the printer is sublimation transfer using dye as a colorant, and the second substrate 22 does not contain a resin capable of dyeing with sublimable dye, then, as shown in Figure 2, a dye-receiving layer 23 may be provided on the second substrate 22. That is, the seal portion 20 may have a laminated structure in which the adhesive layer 21, the second substrate 22, and the receiving layer 23 are laminated in this order from the release sheet 10 side.

[0029] Furthermore, a back layer 13 may be provided on the back surface of the first substrate 11 (the surface opposite to the sealing portion 20) for controlling the transportability and electrostatic properties of the textured sheet S within the printer.

[0030] Here, "skin-patterned sheet S" refers to a sheet (sticker) that is applied to human skin, such as body paint stickers, tattoo stickers, and nail stickers.

[0031] This skin-like design sheet S is a self-adhesive thermal transfer image receiving sheet composed of a release sheet, an adhesive layer, and a base sheet. It is necessary to establish its performance so that it is flexible, does not cause pain when peeled off from human skin, and ensures smooth operation despite the complex printing mechanism.

[0032] The skin-patterned sheet S includes the sheet before the image is formed on the surface portion 25 of the seal portion 20.

[0033] The following provides a detailed explanation of each component of the skin-like design sheet S.

[0034] <Release sheet> (base material) Examples of the first base material 11 (release sheet base material) of the release sheet 10 include stretched or unstretched plastic base materials such as polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), polypropylene, polycarbonate, cellulose acetate resin, polyethylene derivatives, polyamide, and polymethylpentene, as well as paper base materials such as fine paper, coated paper, resin coated paper, art paper, cast coated paper, cardboard, emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin-added paper, and cellulose fiber paper. Polylaminated base paper, which is glassine paper or pigment-coated paper laminated with polyethylene, etc., or synthetic paper mainly composed of polypropylene, etc., can also be used as the first base material 11.

[0035] Furthermore, a layer having microvoids inside can also be used as the first substrate 11. An example of a layer having microvoids inside is a polyolefin resin layer having microvoids inside. Examples of polyolefin resins include polyethylene, polypropylene, polybutene, polyisobutene, polyisobutylene, polybutadiene, polyisoprene, and ethylene-vinyl acetate copolymer. In addition, highly heat-resistant polyester void films such as polyethylene terephthalate and polyethylene naphthalate can also be used.

[0036] The thickness of the first base material 11 should be determined by considering the overall thickness of the skin-like design sheet S and the overall thickness of the release sheet 10. It should be determined by considering the printer specifications for printing on the skin-like design sheet and the feeling of adhesion to human skin when applied to human skin. When prioritizing adhesion to human skin, the adhesive portion 20 should be made thinner. On the other hand, to meet printer specifications, the first base material 11 should be made thicker. For example, the overall thickness of the release sheet 10 is 10 μm or more and 200 μm or less, and the thickness of the first base material 11 is 10 μm or more and 200 μm or less.

[0037] When the thickness of the first substrate 11 is less than 10 μm, the seal substrate 22 must be thicker to ensure printability, resulting in a rough texture when applied to human skin. Conversely, when the thickness of the first substrate 11 is greater than 200 μm, the seal substrate 22 must be thinner to meet the print specifications (printer thickness limit), making it more prone to problems such as peeling at the edges during seal transport within the printer. This is thought to be due to the low rigidity of the seal portion, which is susceptible to slight snagging on mechanical irregularities and small burrs during transport within the printer.

[0038] Preferably, the first substrate 11 has an arithmetic mean height Sa on the surface facing the seal portion 20, measured in accordance with ISO 25178-2:2012, which is 0.01 μm or more and 0.30 μm or less. When printing on the textured sheet S using a printer, the first substrate 11 with a surface roughness within the above range allows for high-definition printing using multiple colors, resulting in a more natural appearance and superior expression of the pattern. The first substrate 11 is preferably a resin film, and more preferably a PET film. It is easy to adjust the surface roughness of the surface facing the seal portion 20 to a preferred range.

[0039] In this disclosure, the arithmetic mean height Sa represents the average of the absolute differences in height between each point relative to the average plane of the surface, and is a parameter that serves as an indicator of surface roughness.

[0040] (Release layer) The release layer 12 provided on the surface of the first base material 11 of the release sheet 10 adjusts the peeling force between the release sheet 10 and the adhesive layer 21.

[0041] Examples of release resins for forming the release layer 12 include silicone resins, silicone-modified resins, polyethylene wax, amide wax, waxes, silicone wax, fluororesins, fluoro-modified resins, polyvinyl alcohol, acrylic resins, thermocrosslinkable epoxy-amino resins, and thermocrosslinkable alkyd-amino resins. The release layer may consist of one type of resin or two or more types of resins. In addition, the release layer 12 may be formed using a crosslinking agent such as an isocyanate compound, a tin-based catalyst, an aluminum-based catalyst, or other catalyst in addition to the release resin.

[0042] Examples of release agents include phosphate ester surfactants, silicone oils, reactive silicone oils, various modified silicone oils such as curable silicone oils, and various silicone resins. These release agents can also be used by adding them to, for example, (meth)acrylic resins, polyolefins, styrene resins, vinyl resins such as ethylene-vinyl acetate copolymers and vinyl chloride-vinyl acetate copolymers, polyesters, polyamides, imide resins, cellulose resins, polyol resins, polycarbonates, and ionomer resins. They can also be used in combination with one or more types of release resins, such as the silicone resins mentioned above.

[0043] The release agent for the release sheet of this disclosure is a reactive silicone release agent, used alone or in combination with other materials. Various types of reactive silicones can be used as the reactive silicone, such as solvent-added type, solvent-free addition type, emulsion addition type, and solvent-free UV-curing type. These reactive silicones can also be used in combination with other release resins, release agents, or resins that do not have significant release properties on their own.

[0044] Typical reactive silicones, specifically solvent-free addition-type silicones, include, for example, Shin-Etsu Chemical's products KNS-3051, KNS-320A, KNS-316, KNS-3002, KNS-3300, and X-62-1387. Solvent-addition-type silicones also exist as reactive silicones. Examples of these include KS-847, KS-847T, KS-776L, KS-3703T, KS-3601, KS-830E, and X-62-2825. These reactive silicones can also be used in combination with other release resins, release agents, and other resins.

[0045] In this disclosure, the objective was achieved by forming a release layer using a mixture of this addition-type silicone and a resin that does not exhibit significant release properties on its own, thereby adjusting the contact angle of its surface and further adjusting the peeling force with the adhesive.

[0046] As curable silicones, for example, radical addition-type silicones that cure by the reaction of mercapto groups and vinyl groups, hydrosilylation reaction-type silicones, acrylic radical polymerization-type silicones, and epoxy group-containing cationic polymerization-type silicones can also be used. Furthermore, it is also possible to use specific peelable UV-curable inks containing peelable radiation-curable polydimethylsiloxane. Compared with thermosetting inks containing thermosetting polydimethylsiloxane, UV-curable inks have the advantage of allowing for shorter or no use of a heat drying oven.

[0047] The release layer may contain various additives. Examples of additives include fillers, plasticizers, antistatic agents, UV absorbers, and dispersants. Colorants, white pigments, etc., may also be added as needed.

[0048] The thickness of the release layer 12 is preferably 0.05 μm or more, more preferably 0.1 μm or more, and even more preferably 0.3 μm or more. Alternatively, the thickness of the release layer 12 is preferably 5 μm or less, more preferably 3 μm or less, and even more preferably 2 μm or less. The thickness of the release layer has a relatively small effect on the release performance, but if it is too thin, the release properties will deteriorate or become unstable. Conversely, if it is too thick, the cost will increase.

[0049] The release layer can be formed, for example, by applying and drying a coating solution obtained by dispersing or dissolving the components described above in a suitable solvent using a known coating method, such as gravure printing, screen printing, or reverse coating using a gravure plate. A release-type resin may also be formed by extrusion.

[0050] The water contact angle of the surface of the release layer 12 is 80° to 109°, preferably 90° to 108°, and more preferably 96° to 107°. When the water contact angle is less than 80°, the peeling force between the release layer 12 and the adhesive layer 21 increases, making it difficult to peel the seal portion 20 from the release sheet 10. Conversely, when the water contact angle exceeds 109°, the seal portion 20 peels off easily from the release sheet 10, making transport problems such as tip peeling, jamming, and detachment more likely to occur during printer transport.

[0051] The water contact angle can be measured using a commercially available contact angle measuring device and the wettability test method (static drop method) in accordance with JIS R 3257:1999. The water contact angle can be measured under the following conditions. Five measurements should be taken, and the average value should be used. [Water contact angle measurement conditions] Measurement device: Contact angle measuring instrument DropMaster DM700 (manufactured by Kyowa Interface Science Co., Ltd.) Measurement environment: 23°C, 50%RH Liquid used for measurement: Distilled water Volume of water droplet: 2 μL Measurement time: 1500ms after droplet deposition

[0052] (Back layer) A back layer 13 can be provided on the back side of the first substrate 11 of the release sheet 10. For example, a coating solution is prepared by dissolving or dispersing particles such as nylon filler, acrylic filler, polyamide filler, fluorine filler, polyethylene wax, amino acid powder, and inorganic filler such as silicon dioxide and metal oxides, along with other necessary additives such as colorants and antistatic agents, in an organic solvent or water within a resin such as acrylic resin, cellulose resin, polycarbonate, polyvinyl acetal, polyvinyl alcohol, polyamide, polystyrene, polyester, or halogenated polymer, in an organic solvent or water, to form a back layer 13. By forming such a back layer 13, the back side of the release sheet 10 is made uneven, improving the transportability of the textured sheet S, particularly the compatibility of multi-color prints and the suitability of the manufacturing process when producing textured seal products. The particle size is preferably 0.1 μm or more and 10 μm or less in average particle size. By forming a back layer composition in which particles of this size are added in an amount of 0.1 to 10 parts by weight to the above resin, the desired transportability can be achieved.

[0053] The thickness of the back layer 13 is not particularly limited, but it is preferably 0.5 μm to 5 μm in a dry state. Furthermore, the surface irregularities should have an arithmetic mean height Sa of 0.1 μm to 2.0 μm, measured in accordance with ISO 25178-2:2012 using the method described below. (Evaluation method) The measurement will be performed using a 3D surface roughness and shape measuring machine, Surfcom 570A-3DF (manufactured by Tokyo Seimitsu), under the following conditions. (Measurement conditions) (Length) X: 5,000 mm, Y: 5,000 mm (Size) X: 2048 points, Y: 202 points (Distance) X: 2443μm, Y: 24.88μm

[0054] If the back surface of the first substrate 11 has an uneven shape, the step of creating the back surface layer 13 by coating or the like may be omitted. For example, when forming the first substrate 11 into a sheet by methods such as EC extrusion or calendering, the surface of the chill roll may be roughened to create the necessary unevenness. For example, by using a chill roll with a surface roughness (Rmax) of 0.1 μm or more and 35 μm or less, a first substrate with a moderately roughened surface can be produced. In addition, an antistatic treatment may be performed as needed.

[0055] When an uneven surface is provided on the back side of the first substrate 11, the optical properties of the substrate change, and the transparency, which is quantified by physical properties such as gloss value, haze, and transmittance, changes. For example, when an uneven surface is provided on a substrate with high transparency, the transparency of the substrate decreases. The transparency of this substrate can be expressed by the transmittance of visible light at a wavelength of 500 nm.

[0056] When the transmittance is 80% or higher, the substrate is considered "transparent," and conversely, when the transmittance is less than 80%, the substrate is considered "semi-transparent to opaque." However, in this disclosure, "semi-transparent" means that the opacity (YB / YW) obtained by the test method in accordance with Method B of JIS K5600-4-1 is 2.0% or more and 90% or less. In this disclosure, the opacity of the release sheet is the value measured from the release layer side. In the case of a textured sheet, it is the value measured from the release layer side of the "release sheet" after the seal portion has been peeled off.

[0057] (white printing layer) The textured sheet of this disclosure may have a white printing layer on the side opposite to the seal portion of the release sheet. That is, the textured sheet may have a white printing layer, a release sheet, and a seal portion in this order in the thickness direction.

[0058] Examples of white printing layers include a white primer layer containing a white pigment and a resin material.

[0059] Examples of white pigments include silica, titanium dioxide, zinc oxide, cerium oxide, titanium mica, muscovite, white carbon, calcium carbonate, barium sulfate, alumina white, and talc. Among these, titanium dioxide is preferred from the viewpoint of whiteness. The white printing layer may contain one or more white pigments.

[0060] The content of white pigment in the white printing layer is preferably 40% by mass or more and 85% by mass or less, more preferably 50% by mass or more and 80% by mass or less. Increasing the content of white pigment in the white printing layer can increase the opacity of the textured sheet. On the other hand, decreasing the content of white pigment in the white printing layer can decrease the opacity of the textured sheet.

[0061] The white printing layer may further contain a pearl pigment. Examples of pearl pigments include oxide-coated micas such as iron oxide-coated mica, iron oxide-coated titanium mica, chromium oxide-coated titanium mica, carmine-coated titanium mica, organic pigment-coated titanium mica, titanium oxide-coated mica, and titanium oxide-coated synthetic mica, as well as fish scales, shell fragments, and pearl fragments.

[0062] Examples of resin materials include (meth)acrylic resins, polyolefins, styrene resins, vinyl resins such as ethylene-vinyl acetate copolymers and vinyl chloride-vinyl acetate copolymers, polyesters, polyamides, imide resins, cellulose resins, polyol resins, polycarbonates, and ionomer resins. The white printing layer may contain one or more resin materials.

[0063] The white printing layer preferably contains either (meth)acrylic resin or polyol resin, or both, as the main resin material. This improves the dispersion stability of the white pigment in the coating liquid for forming the white printing layer and suppresses the occurrence of coating defects. The main resin material refers to the resin material that accounts for 70 parts by mass or more of the total amount of resin material contained in the white printing layer, per 100 parts by mass.

[0064] From the viewpoint of improving adhesion to the release sheet, the white printing layer preferably contains vinyl resin, and more preferably contains a vinyl chloride-vinyl acetate copolymer. The vinyl resin content in the white printing layer is preferably 0.3% to 10% by mass, and more preferably 0.5% to 5% by mass. This further improves the adhesion of the white printing layer to the release sheet.

[0065] The white printing layer preferably contains polyester from the viewpoint of improving adhesion to the release sheet. The polyester content in the white printing layer is preferably 0.03% by mass or more and 1% by mass or less, more preferably 0.1% by mass or more and 1% by mass or less. This further improves adhesion to the release sheet.

[0066] The resin material content in the white printing layer is preferably 10% to 70% by mass, more preferably 10% to 50% by mass. This prevents the re-aggregation of the white pigment and provides high opacity.

[0067] The white printing layer may contain additives. Examples of additives include fillers, plasticizers, antistatic agents, UV absorbers, mold release agents, and dispersants. The white printing layer may contain one or more additives.

[0068] The thickness of the white printed layer is preferably 0.6 μm or more, more preferably 0.8 μm or more, and even more preferably 1.0 μm or more. The thickness of the white printed layer is preferably 6 μm or less, more preferably 5 μm or less, and even more preferably 4 μm or less. Increasing the thickness of the white printed layer can increase the opacity of the laminated sheet described later. On the other hand, decreasing the thickness of the white printed layer can decrease the opacity of the laminated sheet described later.

[0069] The white printed layer can be formed, for example, by applying a coating solution obtained by dispersing or dissolving the above components in a suitable solvent onto the surface of a release sheet using a known coating method and then drying it.

[0070] <Seal part> The sealing portion 20 has a laminated structure in which an adhesive layer 21 and a second substrate 22 are sequentially laminated from the release sheet 10 side. In the textured sheet S of this disclosure, the peeling force of the sealing portion 20 (adhesive layer 21) from the release sheet 10 (release layer 12) is preferably 0.07 N / 20 mm or more and 5.0 N / 20 mm or less, more preferably 0.3 N / 20 mm or more and 3.0 N / 20 mm or less, and even more preferably 0.5 N / 20 mm or more and 2.5 N / 20 mm or less.

[0071] A peeling force of 0.07 N / 20 mm or more prevents the seal portion 20 from peeling off the release sheet 10 during the printing process inside the printer.

[0072] Furthermore, having a peeling force of 5.0 N / 20 mm or less allows customers to peel the seal portion 20 from the release sheet 10 with their fingers without the peeling becoming too difficult, ensuring optimal peeling.

[0073] The release force can be adjusted as appropriate, for example, by the physical properties of the release layer 12.

[0074] The peeling force was measured using a peeling device (small benchtop test machine (EZ Test series, manufactured by Shimadzu Corporation)) in accordance with JIS K 6854-3:1999 (Adhesives - Test methods for peeling adhesive strength - Part 3: T-type peeling).

[0075] In the seal portion 20 of this disclosure, the adhesive force of the adhesive layer 21 to the SUS plate is preferably 1.0 N / 20 mm or more and 10.0 N / 20 mm or less, and more preferably 5.0 N / 20 mm or more and 9.0 N / 20 mm or less. By having the adhesive force to the SUS plate within the above range, pain is reduced when peeling off the seal portion 20 that has been applied to human skin, and the peeling of the seal portion 20 from the release sheet 10 during the printing process in the printer can be suppressed.

[0076] Here, the adhesive strength to the SUS plate can be measured in accordance with Method 1 of the JIS Z0237:2022 (Test Methods for Adhesive Tapes and Sheets) (a test method in which the tape and sheet are peeled off from the stainless steel test plate at a 180° angle at a temperature of 23°C and humidity of 50%), by peeling the test piece in the longitudinal direction under conditions of a width of 25 mm, a peeling angle of 180°, and a peeling speed of 300 mm / min. A SUS plate of SUS304, surface finish BA, thickness of 1.5 mm, and size of 100 mm x 150 mm can be used.

[0077] (Adhesive layer) It is preferable to use a urethane-based or acrylic-based adhesive for the adhesive layer 21 of the seal portion 20, as it is less likely to cause skin irritation or inflammation. Furthermore, a gel-type adhesive is preferable to ensure good adhesion to the skin.

[0078] Examples of adhesive materials include acrylic adhesives, natural rubber adhesives, synthetic rubber adhesives, and urethane adhesives. Among these, acrylic adhesives are preferred because their adhesive strength and peeling strength can be easily adjusted by changing the monomer composition and surfactants, and they have excellent weather resistance. The above acrylic adhesives are not particularly limited, but examples include those with ethyl acrylate (EA), butyl acrylate (BA), 2-ethylhexyl acrylate (2-EHA) as the main monomer, and vinyl acetate (VAc), acrylonitrile (AN), styrene (St), methyl methacrylate (MMA), acrylic acid (AA), itaconic acid (IA), hydroxyethyl methacrylate (HEMA), hydroxypropyl methacrylate (HPMA), dimethylaminoethyl methacrylate (DM), acrylamide (AM), methylolacrylamide (N-MAN), glycidyl methacrylate (GMA), maleic anhydride, etc., as the main components (preferably 80% by mass or more). Furthermore, if the resin system contained in the release layer and the resin system contained in the adhesive are the same, for example, a natural rubber-based adhesive and a synthetic rubber-based adhesive, the release force will become extremely high. Therefore, it is best to adjust the required release force by appropriately adjusting the material composition of each layer. For resin systems, the solubility parameter (SP value) can be used as an indicator. That is, by adding materials with similar SP values ​​to each layer, the release force can be increased, and conversely, by using materials with different SP values, the release force can be decreased.

[0079] Furthermore, the adhesive may contain various additives as needed, such as tackifiers, UV absorbers, crosslinking agents, softeners, pigments, and antioxidants. The adhesive can be prepared using the above raw materials according to conventional methods.

[0080] The thickness of the adhesive layer is, for example, 5 μm to 50 μm, with 10 μm to 20 μm being more preferable. If the thickness of the adhesive layer is less than 5 μm, the adhesive strength may decrease due to the surface properties of the substrate, which may cause peeling during printing or unintentional peeling when applied to human skin. If the adhesive layer is thicker than 50 μm, adhesive may ooze out from the edges, worsening manufacturing suitability and printability. For example, this may result in the edges curling during printing or deterioration of sheet cutting suitability.

[0081] The adhesive coating method is not particularly limited, but examples include the comma coating method, reverse coating method, gravure coating method, reverse gravure method, kiss coating method, knife coating method, bar coating method, and transfer methods that transfer the adhesive coated by these methods onto process paper.

[0082] (base material) The second base material 22 (seal base material) of the seal portion 20 is an elastic sheet having elasticity, wherein the elongation obtained by a test method in accordance with JIS-K-7127:1999 is preferably 10% to 10000%, more preferably 100% to 1000%, and even more preferably 150% to 400%.

[0083] Furthermore, the elongation rate measured according to the test method in accordance with JIS-K-7127:1999 is calculated using the following formula (1), which is the elongation rate of the test object when it is cut (broken) after being pulled by a tensile testing machine at a speed of 200 mm / min. Growth rate (%) = 100 × (L - L0) / L0 ... Equation (1) (L is the length of the test object at the time of fracture, and L0 is the length of the test object before the test.)

[0084] For tensile testing machines, for example, a small benchtop testing machine (EZ Test series, manufactured by Shimadzu Corporation) or a Tensilon universal material testing machine can be used.

[0085] Examples of substrates having such elongation rates include polyester film (PET) with an elongation rate of approximately 50% to 200%, polypropylene with an elongation rate of approximately 100% to 600%, flexible polyvinyl chloride (PVC) with an elongation rate of approximately 150% to 500%, high-density polyethylene with an elongation rate of approximately 10% to 300%, medium-density polyethylene with an elongation rate of approximately 100% to 700%, low-density polyethylene with an elongation rate of approximately 100% to 1000%, and polyurethane with an elongation rate of approximately 100% to 10000%.

[0086] These materials can be used individually or in combination of two or more. In addition to resin materials not exemplified herein, pigments and other additives can also be included to adjust the elongation of the base sheet within this range, thereby enabling the production of sheets that meet the purposes of this disclosure.

[0087] The second substrate 22 can be made of urethane film, polyvinyl chloride film, polyester film, etc. The thickness of the second substrate 22 is preferably 5 μm or more and 150 μm or less, and more preferably 10 μm or more and 100 μm or less. A thickness of 5 μm or more suppresses the occurrence of wrinkles during application and improves workability. A thickness of 150 μm or less reduces the feeling of discomfort during application. When the image formation method in the printer is melt transfer using pigment as the coloring material, the pigment is transferred to the second substrate 22 to form the desired image. The adhesion and heat fixation of the resin constituting the pigment coloring material and the resin constituting the second substrate 22 should be adjusted as appropriate.

[0088] Furthermore, if the image formation method in the printer is sublimation transfer using dye as the colorant, and the second substrate 22 contains a resin that can be dyed with sublimable dye, the dye will be transferred to the second substrate 22 and the desired image will be formed.

[0089] There are no particular limitations on the resin that can be dyed with sublimable dyes contained in the second base material 22. Examples include polyolefin resins such as polypropylene, halogenated resins such as polyvinyl chloride (PVC) or polyvinylidene chloride, vinyl resins such as polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, or polyacrylic acid ester, polyester resins such as polyethylene terephthalate or polybutylene terephthalate, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene or propylene with other vinyl polymers, cellulose resins such as ionomers or cellulose diastase, polycarbonate, acrylic resins, polyurethane, polyamide, polyimide, styrene resin, etc. The second base material 22 may contain one type of resin alone or two or more types as the resin that can be dyed with sublimable dyes. In addition, it may contain a resin that does not have sublimable dye-adhering properties together with the resin that can be dyed with sublimable dyes.

[0090] In particular, the second base material 22 preferably contains polyvinyl chloride (PVC) resin, urethane resin, polyethylene resin, polyester resin, acrylic resin, or cellulose resin as a resin that can be dyed with sublimable dyes, and more preferably contains polyvinyl chloride (PVC) resin, urethane resin, or polyethylene resin. These resins have high dye-adhering properties among resins that can be dyed with sublimable dyes. Among these, polyvinyl chloride (PVC) resin has high dye-adhering properties.

[0091] Furthermore, the second substrate 22 may contain a plasticizer, along with a resin capable of dyeing with the sublimable dye, to adjust the elongation of the second substrate 22 within the above range. By including a plasticizer in the second substrate 22, the elongation of the second substrate 22 can be easily adjusted within a desired range.

[0092] As plasticizers, for example, phthalate ester compounds, sebacate ester compounds, and phosphate ester compounds may be added. Phthalate esters such as DBP (dibutyl phthalate), DOP (di-2-ethylhexyl phthalate, DEHP), n-DOP (dioctyl phthalate), BLP (butyl lauryl phthalate), DLP (dilauryl phthalate), and BBP (butyl benzyl phthalate) are known, but are subject to regulation due to concerns as endocrine disruptors, etc. Therefore, diethyl phthalate, dipropyl phthalate, and di-n-heptyl phthalate, which are not subject to such regulations, are preferred.

[0093] Furthermore, adipic acid derivatives such as DOA (dioctyl adipicate), azelaic acid derivatives such as DOZ (dioctyl azelaicate), sebaciate derivatives such as DOS (dioctyl sebaciate), phosphate esters such as TCP (tricresyl phosphate), TXP (trixylenyl phosphate), Santicizer 141 (monooctyl diphenyl phosphate), B-2-X (monobutyl dixylenyl phosphate), TOF (trioctyl phosphate), methylacetyl lysinolate, and methyl cellosolve lysinolate. Examples of plasticizers include castor oil derivatives such as Paraplex G-60, Paraplex G-62, Monoplex S-71, epoxidized vegetable oils such as tri or tetraethylene glycol esters of C6-C10 fatty acids, ethylene glycol derivatives such as butylphthalylbutyl glycolate, polyester plasticizers such as Paraplex G-25, Paraplex G-50, chlorinated substances such as paraffin chloride and pentachlorobutyl stearate, petroleum-based auxiliary plasticizers such as Savaloid C and Dutrex 25, and nitrile-based synthetic rubbers such as NBR. The second base material 22 may contain one type of plasticizer, or it may contain two or more types of plasticizers.

[0094] There are no particular limitations on the plasticizer content, and it can be appropriately set according to the type of resin to which the sublimable dye contained in the second substrate 22 can be dyed. For example, the content ratio is preferably 20 parts by mass or more and 100 parts by mass or less, and more preferably 30 parts by mass or more and 80 parts by mass or less, per 100 parts by mass of resin material.

[0095] The second base material 22 preferably has an elongation of 100% or more, and more preferably an elasticity of 250% or more. A base material sheet with such an elongation can be adjusted to an appropriate elongation by internal plasticization through copolymerization with vinyl acetate or graft polymerization with acrylic resin, or by external plasticization with various additives, in the case of a PVC sheet. For example, the elongation can also be adjusted by adjusting the amount of dioctyl phthalate, which is a plasticizer. In the case of a standard PVC sheet, when the amount of dioctyl phthalate added is 10 parts or 30 parts per 100 parts PVC, the elongation of the PVC sheet can be made to 200% or 300%.

[0096] By positioning the second substrate 22 on the outermost surface of the sealing portion 20, a thermal transfer image can be formed on the surface of the second substrate 22 by a sublimation thermal transfer method without providing any other layer for receiving sublimation dyes, such as a receiving layer.

[0097] The second substrate 22 may contain resins other than those exemplified above, as well as plasticizers added as needed, and may also contain additives such as stabilizers, titanium dioxide, silica, and pigments for coloring.

[0098] If the release sheet 10 is semi-transparent to opaque, the second substrate 22 may be transparent. On the other hand, if the release sheet 10 is transparent, it is preferable that the second substrate 22 be semi-transparent to opaque. Here, semi-transparent means that the opacity (YB / YW) obtained by the test method in accordance with Method B of JIS K5600-4-1 (Opacity: for light-colored paints) is 2.0% or more and 90% or less. Opaque (for example, white) means that (YB / YW) is 90% or more and 100% or less. Conversely, transparent means that (YB / YW) is 0% or more and 2.0% or less. Specifically, the opacity is calculated by attaching it to opacity test paper (AS ONE 1-3783-01) and measuring the tristimulus values ​​YB (Y value of the film attached to the black part) and YW (Y value of the film attached to the white part), respectively.

[0099] In this disclosure, the opacity of the second substrate 22 is measured from the side to which the dye is applied (the second substrate 22 side, the side that is not the adhesive layer). In the case of the textured sheet form, the "second substrate 22 + adhesive layer 21" with the release sheet peeled off is attached to the opacity test paper (AS ONE 1-3783-01) in a way that prevents air bubbles from forming, and the value is measured from the side to which the dye is applied (the second substrate 22 side, the side that is not the adhesive layer). Even when a primer and a receiving layer are formed on the upper surface of the second substrate, the value is measured from the side to which the dye is applied (the second substrate 22 side, the side that is not the adhesive layer).

[0100] There are no particular limitations on the method for forming the second substrate 22. The second substrate 22 can be formed by mixing the resin exemplified above, a plasticizer added as needed, and any additives in any proportion, and then performing a heat treatment such as EC processing or calendering, so that the elongation rate of the formed second substrate 22 is a desired value. Alternatively, instead of heat treatment, the second substrate 22 can also be formed by dispersing or dissolving the resin exemplified above, a plasticizer added as needed, and any additives in a suitable solvent, and then applying and drying the coating solution onto the adhesive layer 21, or any layer provided on the adhesive layer 21.

[0101] The resin material content in the second base material 22 is preferably 60% by mass or more and 100% by mass or less, more preferably 70% by mass or more and 100% by mass or less. Increasing the resin material content in the second base material 22 increases the strain stress by 50% in the stress-strain curve obtained by tensile testing of the seal portion, as will be described later. Conversely, decreasing the resin material content in the second base material 22 decreases the strain stress by 50% in the stress-strain curve obtained by tensile testing of the seal portion.

[0102] The second base material 22 may contain a white pigment. Examples of white pigments include silica, titanium dioxide, titanium oxide, zinc oxide, cerium oxide, titanium mica, muscovite, white carbon, calcium carbonate, barium sulfate, alumina white, and talc. Among these, titanium dioxide is preferred from the viewpoint of whiteness. The second base material 22 can contain one or more white pigments.

[0103] The second substrate 22 may further contain a pearl pigment. Examples of pearl pigments include oxide-coated micas such as iron oxide-coated mica, iron oxide-coated titanium mica, chromium oxide-coated titanium mica, carmine-coated titanium mica, organic pigment-coated titanium mica, titanium oxide-coated mica, titanium oxide-coated synthetic mica, fish scales, shell fragments, and pearl fragments.

[0104] The pearl pigment is not particularly limited, and other pearl pigments may be used. Furthermore, pearl pigments obtained by coating the surface of the various pearl pigments mentioned above with a colored pigment can also be used.

[0105] The shape of the pearl pigment is not particularly limited, but flat or flaky shapes are preferred. With pearl pigments of this shape, the pearl pigments can be arranged substantially parallel to the surface of the component containing the pearl pigment, and a high pearlescent effect can be imparted through the action of multiple light reflections.

[0106] The content of the white pigment in the second substrate 22 is preferably 0.05% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 5.0% by mass or less. Increasing the content of the white pigment in the second substrate 22 increases the strain stress by 50% in the stress-strain curve obtained by tensile testing of the seal portion, as described later. On the other hand, decreasing the content of the white pigment in the concealing layer decreases the strain stress by 50% in the stress-strain curve obtained by tensile testing of the seal portion.

[0107] The thickness of the second base material 22 is preferably 20 μm or more, more preferably 30 μm or more. A textured sheet having a second base material 22 with a thickness of 20 μm or more can suppress the occurrence of wrinkles when the sheet is applied. Furthermore, a textured sheet having a second base material 22 with a thickness of 30 μm or more allows the release sheet to be easily peeled off and applied without the seal portion becoming wrinkled, thereby improving workability.

[0108] Furthermore, the thickness of the second base material 22 is preferably 150 μm or less, more preferably 100 μm or less. As will be described later, a seal portion equipped with such a second base material 22 allows for easy adjustment of the 50% strain stress in the stress-strain curve obtained by a tensile test of the seal portion.

[0109] Furthermore, the skin-pattern sheet disclosed herein has a 50% strain stress of 5 MPa or more and 160 MPa or less in the stress-strain curve obtained by a tensile test in accordance with JIS-K 7127:1999, using a test piece with a width of 10 mm for the sealing portion. If the 50% strain stress is within the above range, the sealing portion will stretch appropriately when applied to the skin, resulting in excellent adhesion. In addition, the stretching of the sheet can be suppressed when printing on the skin-pattern sheet, resulting in superior expression of the design.

[0110] In this disclosure, the total thickness of the seal portion is preferably 20 μm or more, more preferably 30 μm or more, preferably 150 μm or less, and more preferably 100 μm or less. For example, the total thickness of the seal portion is 20 μm or more and 150 μm or less. When the total thickness of the seal portion is within the above range, the 50% strain stress in the stress-strain curve obtained by tensile testing of the seal portion is likely to satisfy the above requirements.

[0111] When manufactured by heat processing, the second base material 22 may be formed as a single sheet, or it may be formed together with another support (process release sheet), which is not directly illustrated in Figures 1 and 2, and then only the second base material 22 may be peeled off to obtain the second base material 22 for the sealing portion. When manufactured by coating, the second base material 22 for the sealing portion may be formed on the process release sheet by coating and drying on another support (process release sheet), which is not directly illustrated in Figures 1 and 2, and then only the second base material 22 may be peeled off to obtain the second base material 22 for the sealing portion.

[0112] In the image forming method of one embodiment, the skin-patterned sheet S may also have an arbitrary layer between the adhesive layer 21 and the second substrate 22, or on the second substrate 22, to enhance the decorative properties of the seal portion 20 or to impart a predetermined function to the seal portion 20.

[0113] This does not exclude the possibility of providing any layer on the second substrate 22, but as described above, the second substrate 22 can be located on the outermost surface of the textured sheet S.

[0114] (receptor layer) In the case of sublimation transfer using dyes as colorants for image formation in a printer (thermal transfer printer), instead of incorporating a resin capable of dyeing with sublimable dyes into the second substrate 22, a dye-receiving layer 23 may be provided on the second substrate 22. There are no particular limitations on the components of the receiving layer, and examples include polyolefins such as polypropylene, halogenated resins such as polyvinyl chloride or polyvinylidene chloride, vinyl resins such as polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, or polyacrylic acid ester, polyesters such as polyethylene terephthalate or polybutylene terephthalate, copolymers of polyolefins such as ethylene or propylene with other vinyl polymers, cellulose resins such as ionomer or cellulose diacetate, and solvent-based resins such as polycarbonate, polystyrene, polyamide, and acrylic resin. These materials may be used individually or in combination of two or more. There are no particular limitations on the thickness of the receiving layer, but 0.5 μm to 10 μm is preferred, and 2 μm to 6 μm is more preferred.

[0115] It is preferable to add a release agent to the receiving layer to reduce thermal fusion between the ink ribbon and the texture sheet during printing. Various conventionally known silicone oils can be used as release agents, but modified silicone oils are preferred. Preferred modified silicone oils include amino-modified silicone oil, epoxy-modified silicone oil, aralkyl-modified silicone oil, epoxy-aralkyl-modified silicone oil, alcohol-modified silicone oil, vinyl-modified silicone oil, and urethane-modified silicone oil, but epoxy-modified silicone oil, aralkyl-modified silicone oil, and epoxy-aralkyl-modified silicone oil are particularly preferred. It is also preferable to use two or more of these release agents in combination. Oily silicone oils can also be used, but modified silicone oils are preferred. Preferred modified silicone oils include amino-modified silicone oil, epoxy-modified silicone oil, aralkyl-modified silicone oil, epoxy-aralkyl-modified silicone oil, alcohol-modified silicone oil, vinyl-modified silicone oil, and urethane-modified silicone oil, but epoxy-modified silicone oil, aralkyl-modified silicone oil, and epoxy-aralkyl-modified silicone oil are particularly preferred. Furthermore, it is preferable to use two or more of these release agents in combination. The amount of these modified silicone oils added is preferably 0.5% by mass or more and 30% by mass or less of the resin material constituting the base sheet.

[0116] (Receptor layer primer) A primer layer may be provided between the second substrate 22 and the receiving layer 23. The primer layer is an arbitrary layer and is intended to provide adhesion, antistatic properties, and curl prevention properties between the second substrate 22 and the receiving layer 23.

[0117] Examples of binder resins used in this primer layer include polyurethane resins, polyester resins, polycarbonate resins, polyamide resins, acrylic resins, polystyrene resins, polysulfone resins, polyvinyl chloride resins, polyvinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, polyvinyl acetal resins, polyvinyl butyral resins, polyvinyl alcohol resins, epoxy resins, cellulose resins, ethylene-vinyl acetate copolymer resins, polyethylene resins, and polypropylene resins.

[0118] Furthermore, it is preferable to add a layered silicate to the primer layer to impart conductivity. A layered silicate is a compound obtained by reacting sodium, magnesium, and lithium salts with sodium silicate under appropriate conditions. There are no particular limitations on the thickness of the primer layer, but it is preferably 0.05 μm to 5 μm, and more preferably 0.2 μm to 2 μm.

[0119] (protective layer) The skin-patterned sheet of this disclosure may have a sealing portion comprising, for example, an adhesive layer, a second substrate, a concealing layer, a receiving layer, and a protective layer in this order, or an adhesive layer, a second substrate, a concealing layer, a receiving layer on which an image is formed, and a protective layer in this order.

[0120] For example, resin materials can be used as the material constituting the protective layer. Examples of resin materials include polyester, polyamide, polyurethane, polycarbonate, vinyl resin, styrene resin, acrylic resin, acrylic polyol resin, cellulose resin, phenoxy resin, epoxy resin, silicone-modified resins of these resins, ultraviolet-absorbing resins, and ionizing radiation-curing resins.

[0121] 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 polyvinylpyrrolidone. Examples of cellulose resins include ethylcellulose, hydroxyethylcellulose, ethylhydroxycellulose, methylcellulose, and cellulose acetate.

[0122] Examples of ionizing radiation-curable resins include resins obtained by crosslinking and curing radical polymers or radical polymerizable oligomers by irradiation with ionizing radiation. Specifically, these include resins obtained by adding a photopolymerization initiator as needed to a radical polymer or radical polymerizable oligomer and polymerizing and crosslinking it by electron beam or ultraviolet irradiation.

[0123] The resin material content in the protective layer is preferably 80% by mass or more, more preferably 85% by mass or more, relative to the total mass of the protective layer. This allows for sufficient durability of the protective layer, for example.

[0124] The protective layer may contain additives. Examples of additives include UV absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The protective layer may also contain colorants as needed. The protective layer may contain colorants to match the color tone of the laminated sheet to a desired color, such as skin tone. Examples of colorants include pigments and dyes.

[0125] The additive content in the protective layer is preferably 1% by mass or more, more preferably 2% by mass or more, preferably 20% by mass or less, and more preferably 15% by mass or less, relative to the total mass of the protective layer. For example, the additive content in the protective layer is 1% by mass or more and 20% by mass or less.

[0126] 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, preferably 20 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. Such a protective layer can, for example, provide sufficient protective function to the textured sheet.

[0127] The protective layer can be formed, for example, by applying a coating liquid containing the above-mentioned material to a receiving layer or the like using known means such as roll coating, reverse roll coating, gravure coating, reverse gravure coating, bar coating, and rod coating, and then drying it.

[0128] The protective layer can be formed, for example, by preparing a thermal transfer sheet equipped with a protective layer, placing the thermal transfer sheet on a base film or the like corresponding to the base sheet, and transferring the protective layer onto the receiving layer or the receiving layer on which the image is formed by a thermal transfer process.

[0129] The textured sheet S shown in Figure 1 can be manufactured by bonding the release layer 12 of the release sheet 10 and the adhesive layer 21 of the sealing portion 20 facing each other. Alternatively, it can be manufactured by coating the top of the release layer 12 of the release sheet 10 with the adhesive layer 21, and then bonding this adhesive layer 21 to the second substrate 22 (sealing substrate) facing each other. The best method of manufacture should be determined considering the relationship with the coating unit and drying zone of the manufacturing line.

[0130] (Concealing layer) The skin-pattern sheet (sticker-type thermal transfer image receiving sheet) of this disclosure may include a concealing layer. Examples of concealing layers include a white primer layer containing a white pigment and a resin material. For example, by providing an acrylic resin containing 40% to 85% by mass of a white pigment such as titanium dioxide in a thickness of approximately 0.1 μm to 2.0 μm, it is possible to completely conceal the underlying color or to allow it to be partially visible. Such a concealing layer can be formed as part of the layer of the second substrate 22 (sticker substrate) or by printing it as a ribbon panel.

[0131] Examples of white pigments include titanium dioxide, zinc oxide, zinc sulfide, barium sulfate, and calcium carbonate. Among these, titanium dioxide is preferred from the viewpoint of whiteness. The opacity layer may contain one or more white pigments.

[0132] The content of the white pigment in the opacity layer is preferably 40% by mass or more and 85% by mass or less, more preferably 50% by mass or more and 80% by mass or less. By increasing or decreasing the content of the white pigment in the opacity layer, the opacity of the opacity layer can be adjusted to a desired value.

[0133] Examples of resin materials include (meth)acrylic resins, polyolefins, styrene resins, vinyl resins such as ethylene-vinyl acetate copolymers and vinyl chloride-vinyl acetate copolymers, polyesters, polyamides, imide resins, cellulose resins, polyol resins, polycarbonates, and ionomer resins.

[0134] (Concealment rate of the seal) The textured sheet of this disclosure has an opacity ratio (YB / YW) obtained by a test method in accordance with Method B of JIS K5600-4-1, measured from the surface side of the second substrate of the sealing portion (i.e., a laminate having an adhesive layer and a second substrate as essential components, and an opacity layer, an image-receiving layer, and a protective layer as optional components), which is 5% or more and 40% or less, and preferably 10% or more and 35% or less.

[0135] If the opacity ratio (YB / YW) of the sticker area is 5% or higher, the design can be properly displayed when applied to the skin, for example, as a body paint sticker. If the opacity ratio (YB / YW) of the sticker area is 40% or lower, the sticker area is moderately transparent, allowing the skin color to show through, resulting in a more natural appearance when applied to the skin, for example, as a body paint sticker.

[0136] Specifically, the opacity rate of the seal portion is measured by directly attaching the adhesive layer of the seal portion, excluding the release sheet from the textured sheet, to opacity test paper, in accordance with the test method compliant with Method B of JIS K5600-4-1.

[0137] (Opacity rate of skin-patterned sheets) Preferably, the opacity ratio (YB / YW) of the laminate, measured in accordance with Method B of JIS K5600-4-1, is 30% or more and 99% or less, of the textured sheet of this disclosure, i.e., the laminate having a release sheet, an adhesive layer, and a second substrate as essential components, and having a white printing layer, an opacity layer, an image-receiving layer, and a protective layer as optional components.

[0138] If the overall opacity of the skin-pattern sheet is within the above range, the printer will reliably detect the skin-pattern sheet when printing on it, ensuring that the desired design is printed on the sheet without any printing problems.

[0139] The overall opacity of the skin-patterned sheet is measured by fixing the skin-patterned sheet to opacity test paper, in accordance with the test method compliant with Method B of JIS K5600-4-1.

[0140] (Rigidity of the textured sheet) The textured sheet of this disclosure preferably has a rigidity of 300 mgf or more and 1200 mgf or less, and more preferably 300 mgf or more and 700 mgf or less, in the printer transport direction (when the textured sheet is in roll form) or the MD direction (when the textured sheet is in sheet form), measured by the Gahl method of the rigidity test method in accordance with the JIS L 1085:1998 standard. This rigidity of the entire textured sheet, i.e., the entire laminate consisting of a release sheet, adhesive layer and second substrate as essential components, and a white printing layer, opacity layer, image-formed receiving layer and protective layer as optional components, is measured by the Gahl method of the rigidity test method in accordance with the JIS L 1085:1998 standard.

[0141] If the overall rigidity and flexibility of the textured sheet is within the above range, when printing on the textured sheet using a printer, the textured sheet will not curl inside the printer, and the desired pattern can be reliably printed on the textured sheet.

[0142] Furthermore, the rigidity of the entire textured sheet in the direction perpendicular to the printer transport direction (when the textured sheet is in roll form) or in the TD direction (when the textured sheet is a single sheet) is preferably 900 mgf or more and 2000 mgf or less, and more preferably 920 mgf or more and 1500 mgf or less.

[0143] The total thickness of the textured sheet of this disclosure is preferably 50 μm or more, more preferably 150 μm or more, preferably 250 μm or less, and more preferably 200 μm or less. For example, the total thickness of the textured sheet is 150 μm or more and 250 μm or less.

[0144] If the total thickness of the textured sheet is within the above range, the opacity of the textured sheet and the rigidity / softness of the textured sheet in the printer transport direction (MD direction) are likely to satisfy the above requirements.

[0145] In this disclosure, the seal portion 20 of the fabricated textured sheet S was further cut in half to create a "textured textured sheet with specific segments". Figure 3 shows the fabricated textured sheet as seen from the surface, and Figure 4 shows a cross-sectional view.

[0146] Half-cut 2 divides the sealing portion 20 into a frame portion 4 and a remaining portion 5. In the example shown in Figure 3, the half-cut process forms a roughly rectangular and a circular frame portion 4. The detection hole 1, formed as a detection portion, is a through-hole that penetrates the textured sheet S and is formed at predetermined intervals in the longitudinal direction of the textured sheet S. The detection hole 1 functions as a detection mark when the printer forms an image on the frame portion 4 (and the remaining portion 5). The detection hole 1 also serves as a position reference in the longitudinal direction MD when printing a design at a specific position on the sealing portion 20. The longitudinal direction MD refers to the machine direction when manufacturing the film and when printing with a printer.

[0147] As shown in Figures 5 and 6, the half-cut 2 surrounding the frame section 4 may be discontinuous due to the bridge section 3. The frame section 4 and the remaining section 5, separated by the half-cut 2, are connected by the bridge section 3.

[0148] For example, bridge sections 3 are provided at least two locations in the half-cut 2 surrounding one section 4. Furthermore, the bridge sections 3 are provided at the leading and trailing ends of the longitudinal direction MD of the textured sheet S.

[0149] When printing a skin texture image onto the frame section 4 using a printer, the skin texture sheet S repeatedly moves forward and backward along the longitudinal direction MD. Since bridge sections 3 are provided at the leading and trailing ends of the longitudinal direction MD, it is possible to prevent the frame section 4 from peeling off during the printing process.

[0150] The textured sheet S is set in the thermal transfer printer in a roll form, wound so that the second substrate 22 faces outwards. The longitudinal direction MD of the textured sheet S is the winding direction of the textured sheet S.

[0151] The width W of the bridge portion 3 is preferably 0.1 mm or more, and more preferably 0.2 mm or more. By setting the width W to 0.1 mm or more, it is possible to suppress the peeling of the frame portion 4 when printing images with a thermal transfer printer. Furthermore, the width W of the bridge portion 3 is preferably 0.8 mm or less, and more preferably 0.5 mm or less. By setting the width W to 0.8 mm or less, the bridge portion 3 is easily cut when peeling the frame portion 4 from the release sheet 10, thereby suppressing deformation or wrinkling of the frame portion 4. Preferably, there is one or more bridge portions 3 at the front and rear ends of the longitudinal direction MD of each frame. However, this restriction does not apply if there is at least one bridge portion at a location other than the front / rear ends, for example, on an edge perpendicular to the bridge as shown in Figure 5, as long as the purpose of preventing frame peeling is achieved. [Examples]

[0152] The present disclosure will now be described in more detail with reference to examples, but the present disclosure is not limited to these examples.

[0153] (Example 1-1) As a release sheet substrate, a translucent matte PET sheet with a thickness of 100 μm (YB / YW = 7.4%) was used. A release layer coating liquid 1 with the following composition was applied to one side of the release sheet substrate and dried to form a release layer with a thickness of 0.5 μm, thereby producing a release sheet. Next, an acrylic adhesive (Sokken Chemical Co., Ltd., SK Dyne 1251) was applied to a translucent polyvinyl chloride film (seal substrate) with a thickness of 50 μm (YB / YW = 4.2%) and dried to form an adhesive layer with a thickness of 15 μm, thereby producing a seal portion. This seal portion and the previously produced release sheet were laminated together to create the textured sheet of Example 1-1, in which the release sheet substrate, release layer, adhesive layer, and seal substrate were stacked in this order.

[0154] <Release layer coating liquid 1> • Heavy-duty release silicone (KS3703T, Shin-Etsu Chemical Co., Ltd.) Part 2 • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.04 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0155] (Examples 1-2) The surface texture sheet of Example 1-2 was obtained in the same manner as in Example 1-1, except that the release layer coating liquid 1 was changed to a release layer coating liquid 2 with the following composition to form a release layer.

[0156] <Release layer coating liquid 2> • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 2 parts • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.04 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0157] (Examples 1-3) Except for using a 50 μm thick translucent matte PET sheet (YB / YW = 5.3%) as the release sheet substrate, the process was carried out in the same manner as in Example 1-2 to obtain the textured sheet of Example 1-3.

[0158] (Examples 1-4) Except for changing the release layer coating liquid 1 to the release layer coating liquid 3 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-4.

[0159] <Release layer coating liquid 3> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Super heavy-duty peelable silicone (X-62-2825, Shin-Etsu Chemical Co., Ltd.) 10 units • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.24 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 110 parts

[0160] (Examples 1-5) Except for changing the release layer coating liquid 1 to the release layer coating liquid 4 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-5.

[0161] <Release layer coating liquid 4> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 4 parts • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.12 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 55 parts

[0162] (Examples 1-6) Except for changing the release layer coating liquid 1 to the release layer coating liquid 5 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-6.

[0163] <Release layer coating liquid 5> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 2 parts • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.08 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 36 parts

[0164] (Examples 1-7) Except for changing the release layer coating liquid 1 to the release layer coating liquid 6 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-7.

[0165] <Release layer coating liquid 6> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 1 piece • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.06 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 27 parts

[0166] (Examples 1-8) Except for changing the release layer coating liquid 1 to the release layer coating liquid 7 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-8.

[0167] <Release layer coating liquid 7> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 0.1 part • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.04 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0168] (Examples 1-9) Except for changing the release layer coating liquid 1 to the release layer coating liquid 8 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-9.

[0169] <Release layer coating liquid 8> • Acrylic resin (Dianal® BR-85, Mitsubishi Chemical Corporation) 1 part • Super heavy-duty peelable silicone (X-62-2825 Shin-Etsu Chemical Co., Ltd.) 2 parts • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.08 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0170] (Examples 1-10) Except for using a transparent polyvinyl chloride film with a thickness of 50 μm (YB / YW = 0.9%) as the sealing substrate, the same procedure as in Example 1-2 was followed to obtain the textured sheet of Example 1-10.

[0171] (Examples 1-11) Except for using a 50 μm thick white polyvinyl chloride film (YB / YW = 92%) as the seal base material, the same procedure as in Example 1-2 was followed to obtain the textured sheet of Example 1-11.

[0172] (Examples 1-12) Except for using a 100 μm thick transparent PET sheet (YB / YW = 0.7%) as the release sheet substrate and a 50 μm thick white polyvinyl chloride film (YB / YW = 92%) as the seal substrate, all procedures were the same as in Example 1-2 to obtain the textured sheet of Example 1-12.

[0173] (Examples 1-13) Except for using an acrylic-based strong adhesive (Sokken Chemical Co., Ltd., SK Dyne 1515DT) as the adhesive to form the adhesive layer, the same procedure as in Example 1-2 was followed to obtain the textured sheet of Example 1-13.

[0174] (Examples 1-14) As a sealing substrate, a 50 μm thick translucent polyvinyl chloride film is coated with the following receiving layer coating liquid 1 at a rate of 5 g / m². 2 Except for using a coated seal base material (YB / YW = 4.8%), the same procedure as in Example 1-2 was followed to obtain the textured sheet of Example 1-14.

[0175] <Coating liquid for forming a receptive layer 1> • Vinyl chloride-vinyl acetate copolymer (1000A, manufactured by Denki Kagaku Kogyo Co., Ltd.) 100 copies • Epoxy-modified silicone (X-22-3000T, manufactured by Shin-Etsu Chemical Co., Ltd.) 3.5 parts • Methylstyrene-modified silicone 3.5 parts (X-24-510, manufactured by Shin-Etsu Chemical Co., Ltd.) • Polyether-modified silicone (FZ2101, manufactured by Nippon Unicar Co., Ltd.) 2.5 parts • Methyl ethyl ketone (MEK) 200 copies • Toluene 200 copies

[0176] (Examples 1-15) Except for changing the release layer coating liquid 1 to the release layer coating liquid 9 having the composition described below to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-15.

[0177] <Release layer coating liquid 9> • Silicone for water repellency (KR-4000G, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0178] (Examples 1-16) Except for changing the release layer coating liquid 1 to a release layer coating liquid 10 with the following composition to form a release layer, the same procedure as in Example 1-1 was followed to obtain the textured sheet of Example 1-16.

[0179] <Release layer coating liquid 10> • Silicone for water repellency (KR-251, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0180] (Examples 1-17) Except for changing the release layer coating liquid 1 to release layer coating liquid 11 having the following composition to form a release layer, the same procedure as in Example 1-1 was followed to obtain the textured sheet of Example 1-17.

[0181] <Release layer coating liquid 11> • Silicone for water repellency (X-40-2327, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0182] (Examples 1-18) Except for changing the release layer coating liquid 1 to a release layer coating liquid 12 with the following composition to form a release layer, the same procedure as in Example 1-1 was followed to obtain the textured sheet of Example 1-18.

[0183] <Release layer coating liquid 12> • Silicone for water repellency (KR-400, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0184] (Examples 1-19) Except for changing the release layer coating liquid 1 to a release layer coating liquid 13 with the following composition to form a release layer, the same procedure as in Example 1-1 was followed to obtain the textured sheet of Example 1-19.

[0185] <Release layer coating liquid 13> • Silicone for water repellency (KR-401, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0186] (Examples 1-20) Except for changing the release layer coating liquid 1 to a release layer coating liquid 14 with the following composition to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-20.

[0187] <Release layer coating liquid 14> • Vinyl chloride-vinyl acetate copolymer 2.0 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) • Silicone for water repellency (KR-500, Shin-Etsu Chemical Co., Ltd.) 2.0 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0188] (Examples 1-21) Except for using an acrylic adhesive (SK Dyne MD-1, Soken Chemical Co., Ltd.) as the adhesive to form the adhesive layer, the same procedure as in Example 1-2 was followed to obtain the textured sheet of Example 1-21.

[0189] (Examples 1-22) Except for changing the release layer coating liquid 1 to a release layer coating liquid 15 with the following composition to form a release layer, the process was carried out in the same manner as in Example 1-1 to obtain the textured sheet of Example 1-22.

[0190] <Release layer coating liquid 15> • Intermediate release silicone (KS-774, Shin-Etsu Chemical Co., Ltd.) 2.0 parts • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.04 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0191] (Comparative Example 1-1) A textured sheet of Comparative Example 1-1 was obtained in the same manner as in Example 1-1, except that the release layer coating liquid 1 was changed to a release layer coating liquid 16 with the following composition to form a release layer.

[0192] <Release layer coating liquid 16> • Lightly peelable silicone (KS847H, Shin-Etsu Chemical Co., Ltd.) Part 2 • Platinum-containing catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) 0.04 parts MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0193] (Comparative Example 1-2) A textured sheet of Comparative Example 1-2 was obtained in the same manner as in Example 1-1, except that the release layer was omitted.

[0194] (Comparative Examples 1-3) A textured sheet of Comparative Example 1-3 was obtained in the same manner as in Example 1-1, except that the release layer coating liquid 1 was changed to a release layer coating liquid 17 with the following composition to form a release layer.

[0195] <Release layer coating liquid 17> • Vinyl chloride-vinyl acetate copolymer 2 parts (Solvine® CNL, Nisshin Chemical Co., Ltd.) MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0196] (Comparative Examples 1-4) A textured sheet of Comparative Example 1-4 was obtained in the same manner as in Example 1-1, except that the release layer coating liquid 1 was changed to a release layer coating liquid 18 with the following composition to form a release layer.

[0197] <Release layer coating liquid 18> • Acrylic resin (2 parts) (Dianal® BR-85, Mitsubishi Chemical Corporation) MEK / toluene = 1 / 1 (weight ratio 1 / 1, mixed solvent) 18 parts

[0198] (Comparative Examples 1-5) A textured sheet of Comparative Example 1-5 was obtained in the same manner as in Comparative Example 1-1, except that the release sheet substrate was a 100 μm thick white voided PET sheet (YB / YW=94%) and the seal substrate was an 80 μm thick white laminated film (YB / YW=95%) consisting of a voided PET film, a primer layer, and a receiving layer. The receiving layer was made of the receiving layer forming coating liquid 1 of Example 1-13 at a rate of 5 g / m². 2 The primer layer was formed by applying a primer coating solution 1 with the following composition at a rate of 1 g / m². 2 It was formed by applying the coating.

[0199] <Coating liquid for primer layer 1> • Polyester resin (manufactured by Mitsubishi Chemical Corporation, product name: WR-905) 15 units • Titanium dioxide (manufactured by Mitsubishi Chemical Corporation, product name: TCA-888) 25 units Water / Isopropyl alcohol (mass ratio 2 / 1) 60 parts

[0200] (Comparative Examples 1-6) Comparative example 1-6 was obtained in the same manner as in Example 1-2, except that an acrylic-based adhesive (acrylic acid / butyl acrylate / vinyl acetate = 4 / 90 / 6, ethyl acetate solution) was used to form the adhesive layer.

[0201] (Half-cut processing) Using a Thomson-type half-cut processing machine, detection holes were formed in the textured sheets produced in the examples and comparative examples. Furthermore, half-cuts were formed that extended from the surface of the seal substrate to the middle of the release sheet substrate, resulting in half-cut textured sheets having a circular top shape with a diameter of 30 mm and a square top shape with sides of 50 mm.

[0202] (Image print) The textured sheets of the examples and comparative examples, after half-cutting, were placed in a thermal transfer printer (DS620, Dai Nippon Printing Co., Ltd.), and a 128 / 255 grayscale image was printed on each section using an ink ribbon for the DS620.

[0203] <<Evaluation of peeling during conveyance>> The frame portions of the skin design sheet conveyed in the thermal transfer printer during printing were observed, and the peeling at the tip and frame peeling during conveyance were evaluated based on the following evaluation criteria. The results are shown in Table 1.

[0204] 「Evaluation criteria」 A: No tip peeling occurred. There were 0 frame peels after printing 100 sheets. B: No tip peeling occurred. There was 1 or 2 frame peels after printing 100 sheets. C: No tip peeling occurred. There were 3 - 5 frame peels after printing 100 sheets. D: Tip peeling occurred and printing was impossible.

[0205] <<Measurement of peel strength>> For the skin design sheets prepared in the examples and comparative examples, a small desktop tester (EZ Test series, manufactured by Shimadzu Corporation) was used to conduct a test in accordance with JIS K 6854-3:1999 (Adhesives - Test method for peel adhesion strength - Part 3: T-peel), and the seal portion was peeled from the release sheet, and the peel strength at that time was measured. The results are shown in Table 1.

[0206] <<Measurement of adhesion to SUS plate>> The skin design sheets prepared in the examples and comparative examples were cut into dimensions of 75 mm × 25 mm, the release sheet was peeled off, and the adhesive layer of the seal portion was exposed to obtain test pieces. The adhesion of the test pieces to the SUS plate was measured. The adhesion to the SUS plate was in accordance with Method 1 of the test method of JIS Z0237:2022 (Test methods for adhesive tapes and adhesive sheets) (test method of pulling and peeling at 180° with respect to the stainless steel test plate at a temperature of 23°C, humidity of 50%, width of 25 mm, peeling angle of 180°, and peeling speed of 300 mm / min), and was measured by peeling in the length direction of the test piece. For the SUS plate, a SUS304 plate with a surface finish of BA, surface roughness Ra = 0.07 μm, thickness of 1.5 mm, and size of 100 mm × 150 mm was used. The measurement results are shown in Table 1.

[0207] <<Measurement of water contact angle>> The seal portion of the textured sheets prepared in the examples and comparative examples was peeled off to expose the release layer of the release sheet, and the water contact angle of the surface of the release layer was measured in accordance with JIS R 3257:1999 under the following conditions (static droplet method). The measurement was performed five times, and the average value was calculated. The results are shown in Table 1.

[0208] [Water contact angle measurement conditions] Measurement device: Contact angle measuring instrument DropMaster DM700 (manufactured by Kyowa Interface Science Co., Ltd.) Measurement environment: 23°C, 50%RH Liquid used for measurement: Distilled water Volume of water droplet: 2 μL Measurement time: 1500ms after droplet deposition

[0209] <<Silicone weight ratio>> Table 1 shows the silicone resin content (weight %) in the release layer of the release sheet for the textured sheets prepared in the examples and comparative examples. Resin content: R parts by weight Cross-linked silicone content: S parts by weight Cross-linked silicone content = S / (R+S)(%)

[0210] <<Releaseability of the seal>> The ease of peeling the skin-patterned sheets from the release sheet was evaluated based on the following criteria, using a fingertip to create a starting point by hooking the edge of each sheet. Five sheets were peeled off, and the load on the fingertip was evaluated. The results are shown in Table 1.

[0211] "Evaluation Criteria" A: Overall, it was extremely easy to peel off without any significant difficulty. B: It was easy to peel off, even with some resistance. C: It was subjected to a lot of stress and was difficult to remove. The sticker stretched and tore. (The sticker was practically impossible to remove, so the feeling of it being stuck on and the pain of removing it could not be evaluated.)

[0212] <<Feeling of being stuck on>> The textured skin-like sheets prepared in the examples and comparative examples were peeled from the release sheet and applied to human skin. The feel of the sheets was evaluated based on the following evaluation criteria. Five evaluators (two men (in their 20s and 60s) and three women (in their 20s, 30s, and 40s)) applied the sheets to the back of their hands. The evaluation environment was a room at 23°C and 50% RH. The results are shown in Table 1.

[0213] "Evaluation Criteria" A: Four or five people commented that they didn't feel any discomfort when applying it. B: Although it's a little stiff, two or three people commented that they didn't feel any discomfort when applying it. C: It was quite stiff, and fewer than one person commented that it felt comfortable to wear. —: The sticker was practically impossible to remove, so it could not be evaluated.

[0214] <<Pain from peeling off>> The spindle portions of the skin-pattern sheets prepared in the examples and comparative examples were peeled from the release sheet and applied to the skin. The pain experienced when peeling the spindle portions off the skin was evaluated based on the following evaluation criteria. Five evaluators (two men (in their 20s and 60s) and three women (in their 20s, 30s, and 40s)) applied two square spindle portions (50mm x 50mm) to the inner side of their forearms. After staying in a room at 23°C and 50%RH for one hour, the spindle portions were removed, and the pain experienced was evaluated. The results are shown in Table 1.

[0215] "Evaluation Criteria" The following criteria were used to evaluate whether or not pain was present. Pain is present... "Although the sticker pulls when you peel it off, there was almost no pain." "I felt pain when the sticker was pulled off." A: Less than one in five people felt pain. B: Two out of five people felt pain. C: More than 3 out of 5 people felt pain. —: The sticker was practically impossible to remove, so it could not be evaluated.

[0216] Overall evaluation criteria Overall evaluation of four characteristics: peeling during transport, ease of removal, feel when applied, and pain when removed. A: All four evaluations were A grades. B: Peeling during transport is rated B or C, and the rest are rated A. Or, peeling during transport is rated A, and at least one of the following is rated B: ease of removal, feel when applied, or pain when removed. C: Peeling during transport is rated D. Or, peeling during transport is rated A, B, or C, and at least one of the following is rated C: peelability, adhesive feel, or pain upon removal.

[0217] (Examples 1-24) The procedure was carried out in the same manner as in Examples 1-4, except that a Canon SELPHYCP1300 dye-sublimation thermal transfer printer was used instead of the DS620 printer, and the textured sheet (single-fed, with half-cuts, without detection holes) used in Examples 1-4 was used instead of the genuine color ink / paper (KP-36IP). A 128 / 255 grayscale image was printed on each frame. The results of the evaluation were similar, and no peeling occurred during transport. The sticker peelability, adhesive feel, and peeling damage were all rated A, as in Examples 1-4, resulting in an overall rating of A.

[0218] [Table 1]

[0219] It was confirmed that when the peeling force of the seal portion from the release sheet is 0.07 N / 20 mm to 5.0 N / 20 mm, the water contact angle of the release layer surface is 80° to 109°, and the adhesive force of the adhesive layer 21 to the SUS plate is 1.0 N / 20 mm to 10.0 N / 20 mm, peeling during transport is less likely to occur, and there is almost no pain when peeling off the seal portion that has been applied to the skin.

[0220] In the skin design sheet of Comparative Example 1-1, the water contact angle of the release layer was large, and frame peeling occurred during conveyance. In the skin design sheet of Comparative Example 1-2, since there was no release layer, the frame portion did not peel off. In the skin design sheets of Comparative Examples 1-3 and 1-4, the frame portions did not substantially peel off. In the skin design sheet of Comparative Example 1-5, the seal portion was thick and the sticking feeling was not good. In the skin design sheet of Comparative Example 1-6, the adhesive force was strong and there was pain during peeling.

[0221] (Example 2-1) A skin design sheet of Example 2-1 was obtained in the same manner as in Example 1-2, except that the seal base material was a polyvinyl chloride film with a thickness of 70 μm and YB / YW = 11.4%.

[0222] (Example 2-2) A skin design sheet of Example 2-2 was obtained in the same manner as in Example 1-2, except that the seal base material was a polyvinyl chloride film with a thickness of 70 μm and YB / YW = 23.7%.

[0223] (Example 2-3) A skin design sheet of Example 2-3 was obtained in the same manner as in Example 1-2, except that the seal base material was a polyvinyl chloride film with a thickness of 70 μm and YB / YW = 38.4%.

[0224] (Example 2-4) A skin design sheet of Example 2-4 was obtained in the same manner as in Example 1-2, except that the following concealing layer forming coating liquid was applied and dried on a polyvinyl chloride film with a thickness of 70 μm and no white pigment added as the seal base material to form a concealing layer with a thickness of 1.0 μm, and then the coating liquid 1 for forming the receiving layer was applied and dried to form a receiving layer with a thickness of 1.0 μm.

[0225] <Concealing layer forming coating liquid> · Titanium oxide 58 parts (Manufactured by Ishihara Sangyo Co., Ltd., R-780) · (Meth)acrylic resin 10.5 parts (Manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-87) · (Meth)acrylic resin 31.5 parts (Manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-85) · 100 parts of methyl ethyl ketone (MEK) · Toluene

[0226] (Example 2-5) An embossed pattern sheet of Example 2-5 was obtained in the same manner as in Example 2-4, except that the coating liquid for forming the hidden layer was applied and dried to form a hidden layer with a thickness of 2.0 μm.

[0227] (Example 2-6) An embossed pattern sheet of Example 2-6 was obtained in the same manner as in Example 1-1, except that the sealing base material was a polyvinyl chloride film with a thickness of 50 μm and YB / YW = 12.2%.

[0228] (Example 2-7) An embossed pattern sheet of Example 2-7 was obtained in the same manner as in Example 1-2, except that the sealing base material was a polyvinyl chloride film with a thickness of 100 μm and YB / YW = 13.5%.

[0229] (Example 2-8) An embossed pattern sheet of Example 2-8 was obtained in the same manner as in Example 1-2, except that the coating liquid for forming the hidden layer was applied on a polyurethane film with a thickness of 30 μm as the sealing base material, dried to form a hidden layer with a thickness of 1.0 μm, and the coating liquid 1 for forming the receiving layer was applied and dried to form a receiving layer with a thickness of 9.0 μm.

[0230] (Example 2-9) An embossed pattern sheet of Example 2-9 was obtained in the same manner as in Example 1-2, except that the sealing base material was a polyvinyl chloride film with a thickness of 70 μm and YB / YW = 1.1%.

[0231] (Example 2-10) An embossed pattern sheet of Example 2-10 was obtained in the same manner as in Example 1-2, except that the sealing base material was a polyvinyl chloride film with a thickness of 70 μm and YB / YW = 96.8%.

[0232] (Examples 2-11) Except for using a polyethylene terephthalate film with a thickness of 25 μm as the sealing substrate, the same procedure as in Example 2-4 was followed to obtain the textured sheet of Example 2-11.

[0233] (Examples 2-12) Except for using a polyethylene terephthalate film with a thickness of 100 μm as the sealing substrate, the same procedure as in Example 2-4 was followed to obtain the textured sheet of Example 2-12.

[0234] (Examples 2-13) Except for using a 30 μm thick polyurethane film as the sealing substrate, the same procedure as in Example 2-4 was followed to obtain the textured sheet of Example 2-13.

[0235] (Examples 2-14) Except for using a 50 μm thick polyurethane film as the sealing substrate, the same procedure as in Example 2-4 was followed to obtain the textured sheet of Example 2-14.

[0236] (Examples 2-15) The release sheet substrate was a polyethylene terephthalate film with a thickness of 100 μm. The following coating liquid for forming a white printing layer was applied to the side opposite to the release layer and dried to form a white printing layer with a thickness of 1 μm. Except for this, the procedure was the same as in Example 2-1 to obtain the textured sheet of Example 2-15.

[0237] <Coating liquid for forming a white printed layer> (Coating liquid for forming a back layer) • Polyvinyl butyral 10 pieces (Manufactured by Sekisui Chemical Co., Ltd., S-REC® BL-7) • Silicon dioxide 7.4 parts (Manufactured by Fuji Silysia Chemical Co., Ltd., Silysia 380) • Titanium chelate 0.32 parts (Manufactured by Denka Polymer Co., Ltd., AT chelating agent) • Toluene 54 units IPA 54 copies (Coating liquid for the back surface layer) · 10 parts of polyvinyl butyral (Esrec (registered trademark) BL-7, Sekisui Chemical Co., Ltd.) · 2 parts of nylon particles (average particle diameter 7.5 μm) (MW330, Shinto Paint Co., Ltd.) · 0.44 parts of Pt catalyst (CAT-PL-50T, Shin-Etsu Chemical Co., Ltd.) · 0.36 parts of reaction retarder (CAT-PLR-5, Shin-Etsu Chemical Co., Ltd.) · 2.4 parts of titanium chelate (AT chelating agent, Denka Polymer Co., Ltd.) · 30 parts of toluene · 30 parts of isopropyl alcohol

[0238] (Example 2-16) An embossed sheet of Example 2-16 was obtained in the same manner as Example 2-15, except that the release sheet substrate was a polyethylene terephthalate film with a thickness of 125 μm.

[0239] (Example 2-17) An embossed sheet of Example 2-17 was obtained in the same manner as Example 2-15, except that the seal substrate was a polyvinyl chloride film with a thickness of 50 μm and YB / YW = 12.2%, and the release sheet substrate was a polyethylene terephthalate film with a thickness of 50 μm.

[0240] (Example 2-18) An embossed sheet of Example 2-18 was obtained in the same manner as Example 2-15, except that the release sheet substrate was a polyethylene terephthalate film with a thickness of 50 μm.

[0241] (Example 2-19) An embossed sheet of Example 2-19 was obtained in the same manner as Example 2-1, except that a polyester-based synthetic paper (Crisper K1212, manufactured by Toyobo Co., Ltd.) with a thickness of 100 μm was used as the release sheet substrate, and the following coating liquid for forming a transparent printing layer was used instead of the coating liquid for forming a white printing layer.

[0242] <Coating liquid for forming a transparent printing layer> (Coating liquid for forming a back layer) • Polyvinyl butyral 10 pieces (Manufactured by Sekisui Chemical Co., Ltd., S-REC® BL-7) • Titanium chelate 0.32 parts (Manufactured by Denka Polymer Co., Ltd., AT chelating agent) • Toluene 54 units IPA 54 copies (Coating liquid for the back surface layer) • Polyvinyl butyral 10 pieces (Esrec® BL-7, Sekisui Chemical Co., Ltd.) • Nylon particles (average particle size 7.5 μm) 2 parts (MW330 Shinto Paint Co., Ltd.) ·Pt catalyst 0.44 part (CAT-PL-50T Shin-Etsu Chemical Co., Ltd.) • Reaction retarder 0.36 parts (CAT-PLR-5 Shin-Etsu Chemical Co., Ltd.) • Titanium chelate 2.4 parts (AT chelating agent, Denka Polymer Co., Ltd.) • Toluene (30 copies) Isopropyl alcohol 30 parts

[0243] (Examples 2-20) Except for changing the release sheet substrate to a polyester-based synthetic paper with a thickness of 125 μm (Crisper K1212, manufactured by Toyobo Co., Ltd.), all procedures were the same as in Example 2-19 to obtain the textured sheet of Example 2-20.

[0244] [Measurement method] <Concealment rate of the seal area> The opacity ratio (YB / YW) of the seal area was determined using a test method compliant with Method B of JIS K5600-4-1 (Opacity: for light-colored paints).

[0245] Specifically, in the skin-pattern sheets of Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11, the adhesive layer of the seal portion was attached to opacity test paper (AS ONE 1-3783-01), and the tristimulus values ​​YB (Y value of the film attached to the black area) and YW (Y value of the film attached to the white area) were measured and calculated, respectively. The results are shown in Table 2.

[0246] <Overall opacity of the textured sheet> The overall opacity ratio (YB / YW) of the textured sheet was determined using a test method compliant with Method B of JIS K5600-4-1 (Opacity: for light-colored paints).

[0247] Specifically, the release sheet side of the skin texture sheets from Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11 was placed on opacity test paper (AS ONE 1-3783-01) and fixed in place. The tristimulus values ​​YB (Y value of the film applied to the black area) and YW (Y value of the film applied to the white area) were measured and calculated, respectively. The results are shown in Table 2.

[0248] <50% strain stress in the seal area> The stress-strain curve obtained by the test method in accordance with JIS-K 7127:1999. The 50% strain stress was determined from the line (SS curve).

[0249] [Stress-strain curve] The stress-strain curves obtained by tensile testing in accordance with JIS K 7127:1999 were determined. The tensile tests were conducted using a small benchtop testing machine (EZ Test series, manufactured by Shimadzu Corporation) under the measurement conditions described below for the textured sheets of Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11.

[0250] (Measurement conditions) • Test specimen: Type 2, 10 mm wide • Initial chuck spacing: 50mm • Test speed: 100 mm / min • Uses a 500N load cell • Test environment: Temperature 25°C, Humidity 50%RH • Number of measurements: Average of 3 measurements

[0251] <Rating 1> For the seal portions of Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11 described above, we evaluated whether or not they elongated by 50% based on the obtained stress-strain curves. The results are shown in Table 2. "Evaluation Criteria" A: It will grow by 50% B: Does not grow by 50%

[0252] <Rating 2> For the seal portions of Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11 described above, the 50% strain stress σ was calculated from the obtained stress-strain curves. The results are shown in Table 2.

[0253] [Evaluation Method] The following evaluations were performed using the skin texture sheets from Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11 described above.

[0254] <Skin transparency> Regarding the "transparency of the skin" when the sticker is applied to the skin, five evaluators applied the sticker to their skin and conducted a sensory evaluation according to the following evaluation criteria. The results are shown in Table 3.

[0255] "Evaluation Criteria" A: All five judged that the transparency was good. B: 3-4 people judged the transparency to be good. C: Three or more people judged the transparency to be poor (it was see-through). D: Three or more people judged that the transparency was not good (not transparent).

[0256] <Printer disconnection detection> The material was placed in a thermal transfer printer (DS620, manufactured by Dai Nippon Printing Co., Ltd.), and five pieces were cut using the printer's cutter. The printer's cutting performance was evaluated according to the following evaluation criteria. The results are shown in Table 3.

[0257] "Evaluation Criteria" A: All five pieces were cut. B: One or more sheets were difficult to cut. (The sticker was not torn.) C: One or more sheets were damaged during cutting. (The printer did not detect the sticker.)

[0258] <Rigidity and softness of the textured sheet> The stiffness and flexibility of the textured sheets of Examples 2-1 to 2-20 and Examples 1-2, 1-10, and 1-11 were measured using the Gurley method, as described in JIS L 1085:1998. A Gurley flexibility tester manufactured by Toyo Seiki Seisakusho Co., Ltd. was used as the measuring instrument. The measurement results are shown in Table 2.

[0259] For the skin-like texture sheets of Examples 2-1 to 2-20, peel strength, adhesive strength, and water contact angle were measured using the same method as described above. The results are shown in Table 2. In addition, for the skin-like texture sheets of Examples 2-1 to 2-20, peeling during transport, peelability, feel upon application, and pain upon removal were evaluated using the same evaluation criteria as described above. The results are shown in Table 3.

[0260] [Table 2]

[0261] [Table 3]

[0262] Although this disclosure has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without deviating from the intent and scope of this disclosure. [Explanation of Symbols]

[0263] 1 detection hole 2 Half cut 3. Bridge section 4-panel section 5. Remaining parts 10 Release sheets 11. First base material (release sheet base material) 12 Release layer 13. Back layer 20 Seal part 21 Adhesive layer 22 Second base material (sealing base material) 23 Receptive layer

Claims

1. A textured sheet having a release sheet and a sealing portion, The release sheet has a first substrate and a release layer that are laminated in order, and the seal portion is provided on the release layer so as to be removable from the release sheet. The sealing portion has a laminated structure in which the adhesive layer and the second substrate are laminated in this order from the release sheet side. The peel force obtained from the seal portion from the release sheet according to the test method in accordance with JIS K 6854-3:1999 (Adhesives - Test methods for peel strength - Part 3: T-type peel) is 0.07 N / 20 mm or more and 5.0 N / 20 mm or less. The water contact angle of the surface of the release layer exposed by peeling the seal portion from the release sheet is 80° or more and 109° or less, as determined by the drop test in accordance with JIS R 3257:1999. The adhesive layer of the sealing portion is a textured sheet having an adhesive strength to a SUS plate obtained by a test method compliant with JIS Z0237:2022 of 1.0 N / 20 mm or more and 10.0 N / 20 mm or less.

2. The textured sheet according to claim 1, wherein the thickness of the first substrate of the release sheet is 10 μm or more and 200 μm or less, and the thickness of the release layer is 0.05 μm or more and 5 μm or less.

3. The textured sheet according to claim 1, wherein the thickness of the adhesive layer is 5 μm or more and 50 μm or less, and the thickness of the second substrate is 5 μm or more and 150 μm or less.

4. The textured sheet according to any one of claims 1 to 3, wherein the surface portion of the textured sheet on the second substrate side is a surface portion that can be printed by an on-demand printing method.

5. The skin-patterned sheet according to claim 4, wherein the on-demand printing method is at least one printing method selected from the group consisting of a thermal transfer method, an inkjet method, and an electrophotographic method.

6. The skin-pattern sheet according to claim 4, wherein the surface portion of the skin-pattern sheet on the second substrate side has a receptive layer that can be printed by the on-demand printing method.

7. The seal portion is divided into a cut portion and a remaining portion by a half-cut, as described in claim 1, for the textured sheet.

8. The skin-patterned sheet according to claim 1, wherein a detection portion is formed on the release sheet, the sealing portion, or both the release sheet and the sealing portion.

9. The textured sheet according to claim 1, wherein the opacity (YB / YW) obtained by a test method in accordance with Method B of JIS K5600-4-1, measured from either the release sheet and the sealing portion, or from the sealing portion side of the textured sheet, is 2.0% or more and 90% or less.

10. The textured sheet according to claim 1, wherein the opacity (YB / YW) obtained by a test method in accordance with Method B of JIS K5600-4-1, measured from the surface side opposite to the release sheet of the sealing portion, is 5% or more and 40% or less.

11. The sealing portion of the textured sheet according to claim 1, wherein the 50% strain stress in the stress-strain curve obtained by a tensile test (width of test piece: 10 mm) in accordance with JIS K 7127:1999 is 5 MPa or more and 160 MPa or less.

12. The opacity (YB / YW) obtained by a test method compliant with Method B of JIS K5600-4-1, measured from the surface side opposite to the release sheet of the seal portion, is 5% or more and 40% or less. The textured sheet according to claim 1, wherein the opacity (YB / YW) of the textured sheet obtained by a test method in accordance with Method B of JIS K5600-4-1 is 30% or more and 99% or less.

13. The skin-pattern sheet according to claim 1, wherein the second substrate is polyvinyl chloride (PVC) or polyurethane.

14. The textured sheet according to claim 1, wherein the stiffness of the textured sheet in the printer transport direction, as measured by the Gahl method of the stiffness test method in accordance with JIS L 1085:1998, is 300 mgf or more and 1200 mgf or less.

15. The textured sheet according to claim 1, wherein the surface of the first substrate opposite to the release layer is provided with irregularities having an arithmetic mean height Sa measured in accordance with ISO 25178-2:2012 of 0.1 μm or more and 2.0 μm or less.

16. The textured sheet according to claim 1, wherein the surface of the first substrate on the release layer side is provided with irregularities having an arithmetic mean height Sa measured in accordance with ISO 25178-2:2012 of 0.01 μm or more and 0.30 μm or less.

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