Stacked sheet and skin design sheet

Abstract

To provide a laminated sheet which can be used as a skin design sheet with a natural appearance while suppressing the generation of wrinkles when adhered to the skin.SOLUTION: A laminated sheet comprises at least a receiving layer, a concealing layer and a base material layer in this order. Tensile test force at 5% tension of the laminated sheet, as measured in accordance with JIS K7127:1999, is 0.10 N or more and 0.62 N or less.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a laminated sheet and a skin design sheet.

Background Art

[0002] Skin design sheets that are used by being attached to the skin are known (see, for example, Patent Document 1). The skin design sheet includes, for example, a release sheet, an adhesive layer, a base material layer, and a protective sheet in this order in the thickness direction. The skin design sheet is attached to the user's skin by a procedure of peeling the release sheet from the adhesive layer and attaching the adhesive layer to the skin, and then peeling the protective sheet from the base material layer.

[0003] Examples of the skin design sheet include a tattoo seal and a skin concealing sheet. The tattoo seal is a sheet in which various patterns are printed on a base material. The tattoo seal is sold, for example, at variety stores, sports and music event venues, amusement parks, etc., and is used to enhance the atmosphere. The skin concealing sheet is a sheet in which a predetermined color is colored in advance on a base material by screen printing or the like. The skin concealing sheet is used, for example, to conceal discolored parts such as skin wounds or stains. The user selects and uses a skin design sheet that matches the color of their own skin.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the colors of the commercially available skin concealing sheets are limited, and there have been concerns and dissatisfaction regarding the color difference between the skin concealing sheet and the natural skin tone. Therefore, it has been considered to provide a skin design sheet having a printed layer with a color matching the natural skin tone of the user by forming an image through on-demand printing from a captured image of the user. This can suppress the sense of discomfort when the skin design sheet is attached to the user's skin.

[0006] In such a skin design sheet, it is required that the appearance when attached to the skin looks natural. However, since the skin is translucent, if it is made opaque by printing, the visual appearance may be different from the skin and may result in an unnatural appearance. In addition, wrinkles may occur when attached to the skin, resulting in an unnatural appearance.

[0007] An object of the present disclosure is to provide a laminated sheet that can be used as a skin design sheet that suppresses the occurrence of wrinkles when attached to the skin and has a natural appearance. Another object of the present disclosure is to provide a skin design sheet that suppresses the occurrence of wrinkles when attached to the skin and has a natural appearance.

Means for Solving the Problems

[0008] The laminated sheet of the present disclosure includes at least a receiving layer, a concealing layer, and a base material layer in this order. The tensile test force at 5% elongation of the laminated sheet obtained by a test method conforming to JIS K7127:1999 is 0.10 N or more and 0.62 N or less.

Effects of the Invention

[0009] According to the present disclosure, it is possible to provide a laminated sheet that can be used as a skin design sheet that suppresses the occurrence of wrinkles when attached to the skin and has a natural appearance. Also, according to the present disclosure, it is possible to provide a skin design sheet that suppresses the occurrence of wrinkles when attached to the skin and has a natural appearance.

Brief Description of the Drawings

[0010]

Figure 1

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present disclosure will be described in detail. The present disclosure can be implemented in many different forms and is not construed as being limited to the description of the embodiments exemplified below. The drawings may schematically show the width, thickness, shape, etc. of each layer compared to the embodiments for the sake of clearer explanation, but this is merely an example and does not limit the interpretation of the present disclosure. In this specification and each drawing, elements that are the same as those already described with respect to the previous drawings may be given the same reference numerals, and detailed description may be omitted as appropriate.

[0012] In the present disclosure, when a plurality of upper limit value candidates and a plurality of lower limit value candidates are listed for a certain parameter, the numerical range of that parameter may be constituted by combining any one upper limit value candidate and any one lower limit value candidate. Examples of the above parameters include physical property values, component content ratios, and layer thicknesses. As an example, the description “Parameter B is preferably A1 or more, more preferably A2 or more, still more preferably A3 or more. Parameter B is preferably A4 or less, more preferably A5 or less, still more preferably A6 or less.” will be explained. In this example, the numerical range of parameter B may be A1 or more and A4 or less, A1 or more and A5 or less, A1 or more and A6 or less, A2 or more and A4 or less, A2 or more and A5 or less, A2 or more and A6 or less, A3 or more and A4 or less, A3 or more and A5 or less, A3 or more and A6 or less.

[0013] In this specification, each component (for example, resin materials and additives such as colorants) that appears in the following description may be used alone or in combination of two or more.

[0014] [Laminated Sheet] The laminated sheet of the present disclosure includes at least a receiving layer, a concealing layer, and a base material layer in this order.

[0015] Hereinafter, with reference to the drawings, specific examples of the laminated sheet of the present disclosure will be described. The laminated sheet 1 shown in FIG. 1 includes a base material layer 10, a concealing layer 20, and a receiving layer 30 in this order in the thickness direction. In this example, an image of a desired color such as skin color may be formed on the receiving layer 30 by a coloring agent such as a dye.

[0016] The laminated sheet may further include an adhesive layer (not shown) between the base material layer and the concealing layer. The laminated sheet may include a base material layer, an adhesive layer, a concealing layer, and a receiving layer in this order in the thickness direction.

[0017] The laminated sheet may further include a protective layer (not shown) on the base material layer. The laminated sheet may include a base material layer, a concealing layer, a receiving layer, and a protective layer in this order in the thickness direction.

[0018] The laminated sheet may further include an adhesive layer, a release sheet, and, if necessary, a protective sheet on the surface of the base material layer opposite to the surface facing the receiving layer. The laminated sheet may include, if necessary, a release sheet, an adhesive layer, a base material layer, a concealing layer, a receiving layer on which an image is formed, a protective layer, and, if necessary, a protective sheet in this order. In these examples, one or both of the base material layers 10 may be colored with a desired color such as skin color by a coloring agent. A printing layer may be provided on one or both surfaces of the base material layer 10.

[0019] In one embodiment, the laminated sheet of the present disclosure is in the form of a long strip, and FIG. 1 is a cross-sectional view perpendicular to the longitudinal direction of the laminated sheet 1, for example.

[0020] <Base material layer> The laminated sheet of the present disclosure includes a base material layer. Examples of the base material layer include resin films formed from resin materials. Examples of the resin materials include polyurethane, polyester, polyamide, polyimide, polyolefin, vinyl resin, styrene resin, acrylic resin, and cellulose resin.

[0021] As the base material layer, for example, a stretchable base material is preferably used. Examples of the stretchable base material include the above resin films, and among the above resin films, polyvinyl chloride (PVC) films, urethane films, and polyethylene films are preferable.

[0022] The stretchable base material preferably has an elongation rate of 30% or more and 100% or less in order to follow the expansion and contraction of the adherend when the laminated sheet is attached to the adherend. The elongation rate of the stretchable base material is the elongation rate obtained by a test method compliant with JIS K 7127:1999. The elongation rate is represented by the following formula (1). Elongation rate (%) = 100×(L - L0) / L0 ···(1)

[0023] In formula (1), L is the length when the stretchable base material is pulled at a speed of 200 mm / min using a tensile testing machine until the stretchable base material breaks. L0 in formula (1) is the length of the stretchable base material before being pulled by the tensile testing machine. As the tensile testing machine, a tensilon universal material testing machine can be used.

[0024] The base material layer may contain additives. Examples of the additives include ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The base material layer may contain a colorant as necessary. The base material layer may contain a colorant in order to match the color tone of the laminated sheet to a desired color such as skin color. Examples of the colorants include pigments and dyes.

[0025] The thickness of the base material layer is preferably 3 μm or more, more preferably 5 μm or more. A laminated sheet provided with a base material layer having a thickness of 3 μm or more can, for example, suppress the generation of wrinkles during sheet attachment. Further, a laminated sheet provided with a base material layer having a thickness of 5 μm or more can easily peel off and attach the release sheet without the base material layer (sealing paper) being distorted when peeling the release sheet from the laminated sheet, and the workability can be improved. Also, the thickness of the base material layer is preferably 10 μm or less, more preferably 7 μm or less. A laminated sheet provided with such a base material layer can, for example, suppress the discomfort of the user after sheet attachment.

[0026] A printing layer may be provided on the base material layer. The printing layer may be a layer for adjusting the color tone of the laminated sheet to a desired color such as skin color. The printing layer contains a colorant. Examples of the colorant include pigments and dyes.

[0027] <Concealing layer> The laminated sheet of the present disclosure includes a concealing layer. Examples of the concealing layer include a white primer layer containing a white pigment and a resin material. Examples of the white pigment include titanium oxide, zinc oxide, zinc sulfide, barium sulfate, and calcium carbonate. Among these, titanium oxide is preferable from the viewpoint of whiteness. The concealing layer can contain one or more white pigments.

[0028] The content ratio of the white pigment in the concealing 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. Here, when the content ratio of the white pigment in the concealing layer is increased, the concealing rate of the concealing layer described later and the tensile test force at 5% tensile of the laminated sheet can be increased. On the other hand, when the content ratio of the white pigment in the concealing layer is decreased, the concealing rate of the concealing layer described later and the tensile test force at 5% tensile of the laminated sheet can be decreased.

[0029] Examples of the resin material include vinyl resins such as (meth)acrylic resin, polyolefin, styrene resin, ethylene-vinyl acetate copolymer and vinyl chloride-vinyl acetate copolymer, polyester, polyamide, imide resin, cellulose resin, polyol resin, polycarbonate and ionomer resin. The hiding layer can contain one or more resin materials.

[0030] From the viewpoint of improving the adhesion to the base material layer when forming by transfer to the base material layer, the hiding layer preferably contains a vinyl resin, and more preferably contains a vinyl chloride-vinyl acetate copolymer. The content ratio of the vinyl resin in the hiding layer is preferably 0.3% by mass or more and 10% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. Thereby, while maintaining the thermal transferability of the hiding layer, the adhesion of the hiding layer to the base material layer can be further improved.

[0031] From the viewpoint of improving the adhesion to the base material layer when forming by transfer to the base material layer, the hiding layer preferably contains a vinyl resin, and more preferably contains a vinyl chloride-vinyl acetate copolymer. The content ratio of the vinyl resin in the hiding layer is preferably 0.3% by mass or more and 10% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. Thereby, while maintaining the thermal transferability of the hiding layer, the adhesion of the hiding layer to the base material layer can be further improved.

[0032] From the viewpoint of improving the adhesion to the base material layer, the hiding layer preferably contains polyester. The content ratio of the polyester in the hiding layer is preferably 0.03% by mass or more and 1% by mass or less, and more preferably 0.1% by mass or more and 1% by mass or less. Thereby, while maintaining the thermal transferability of the hiding layer, the adhesion to the base material layer can be further improved.

[0033] The content ratio of the resin material in the hiding layer is preferably 10% by mass or more and 70% by mass or less, and more preferably 10% by mass or more and 50% by mass or less. Thereby, re-aggregation of the white pigment can be prevented, and high hiding power can be obtained.

[0034] The hiding layer may contain additives. Examples of the additives include fillers, plasticizers, antistatic agents, ultraviolet absorbers, mold release agents, and dispersants. The hiding layer can contain one or more additives.

[0035] The thickness of the hiding 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 hiding layer is preferably 6 μm or less, more preferably 5 μm or less, and even more preferably 4 μm or less. Here, when the thickness of the hiding layer is increased, the color of the substrate can be concealed. On the other hand, when the thickness of the hiding layer is decreased, the hiding rate of the hiding layer described below and the tensile test force at 5% elongation of the laminated sheet can be decreased.

[0036] The hiding layer preferably has a hiding rate (YB / YW) of 15% or more, more preferably 20% or more, obtained by a test method conforming to JIS K5600-4-1. Also, the hiding rate is preferably 85% or less, more preferably 60% or less. If the hiding rate of the hiding layer is 15% or more, stains and the like can be effectively hidden when pasted on the skin. Also, if the hiding rate of the hiding layer is 70% or less, it becomes easy to adjust the tensile test force at 5% elongation of the entire laminated sheet within a required range, and if it is 60% or less, a more natural appearance can be obtained when pasted on the skin.

[0037] The hiding layer can be formed, for example, by applying and drying a coating liquid obtained by dispersing or dissolving the components described above in an appropriate solvent onto an arbitrary layer provided on the substrate layer or the substrate of the transfer sheet by the above-described known coating method.

[0038] (Adhesive layer) The laminated sheet of the present disclosure may include an adhesive layer. In one embodiment, the laminated sheet may include an adhesive layer between the substrate layer and the hiding layer. In this case, the adhesion between the substrate layer and the hiding layer when the hiding layer provided on the transfer sheet is transferred to the substrate layer can be made better.

[0039] The adhesive layer preferably contains a resin material. Examples of the resin material include (meth)acrylic resin, vinyl resin, polyolefin, polyester, polyurethane, epoxy resin, urea resin, melamine resin, and phenol resin. The adhesive layer can contain one or more resin materials.

[0040] The content ratio of the resin material in the adhesive layer is preferably 70% by mass or more and 100% by mass or less, more preferably 80% by mass or more and 100% by mass or less.

[0041] The adhesive layer may be a layer obtained by curing the resin material with a curing agent. Examples of the curing agent include isocyanate compounds, aliphatic amines, cycloaliphatic amines, aromatic amines, and acid anhydrides.

[0042] The thickness of the adhesive layer is preferably 0.1 μm or more, more preferably 0.5 μm or more, preferably 10 μm or less, more preferably 2 μm or less. The thickness of the adhesive layer is, for example, 0.1 μm or more and 10 μm or less.

[0043] The adhesive layer can be formed, for example, by applying and drying a coating liquid obtained by dispersing or dissolving the components described above in a suitable solvent onto the concealing layer by the above-described known coating method.

[0044] <Receiving layer> The laminated sheet of the present disclosure includes a receiving layer. The receiving layer is a layer for receiving dyes and the like transferred from a thermal transfer sheet. For example, when forming an image using a printer, it may be formed on the receiving layer provided in advance on the base material layer, or after forming an image on the receiving layer provided on the transfer sheet, the base material layer may be transferred through the concealing layer. The image may be, for example, an image for adjusting the color tone of the laminated sheet to a desired color such as skin color.

[0045] As the material constituting the receiving layer, for example, a resin material can be used. Examples of the resin material include polyolefin, vinyl resin, styrene resin, acrylic resin, polyester, polyamide, polyimide, polyurethane, polycarbonate, cellulose resin, and ionomer resin. Examples of polyolefin include polyethylene and polypropylene. Examples of vinyl resin include polyvinyl chloride, polyvinyl acetate, and vinyl chloride-vinyl acetate copolymer. Examples of polyester include polyethylene terephthalate and polyethylene naphthalate. As the resin material constituting the receiving layer, vinyl resin is preferable, and vinyl chloride-vinyl acetate copolymer is more preferable.

[0046] The content ratio of the resin material in the receiving layer is preferably 70% by mass or more, more preferably 80% by mass or more, based on the total mass of the receiving layer. Thereby, for example, sufficient durability can be imparted to the receiving layer.

[0047] The receiving layer may contain an additive. Examples of the additive include ultraviolet absorber, light stabilizer, antioxidant, colorant, filler, and release agent.

[0048] The content ratio of the additive in the receiving layer is preferably 1% by mass or more, more preferably 2% by mass or more, based on the total mass of the receiving layer, and is preferably 30% by mass or less, more preferably 20% by mass or less. The content ratio of the additive in the receiving layer is, for example, 1% by mass or more and 30% by mass or less.

[0049] The thickness of the receiving layer is preferably 0.3 μm or more, more preferably 0.5 μm or more, still more preferably 0.8 μm or more. The thickness of the receiving layer is preferably 5.0 μm or less, more preferably 3.0 μm or less, still more preferably 2.0 μm or less. Here, if the thickness of the receiving layer is equal to or more than the lower limit value, sufficient printing density cannot be obtained. On the other hand, if the thickness of the receiving layer is equal to or less than the upper limit value, the followability during skin attachment is insufficient, and the sense of unity with the skin cannot be obtained.

[0050] When a receiving layer is provided in advance on a base material layer, in the step of applying and drying a coating liquid for the receiving layer on the concealing layer, the base material layer may be melted and damaged, or denatured or deformed by the solvent contained in the coating liquid. In this case, it is preferable to transfer the receiving layer onto the base material layer by thermal transfer. The receiving layer may be provided in advance on the base material layer, or may be provided by thermal transfer onto the base material layer during image formation.

[0051] (Protective layer) The laminated sheet of the present disclosure may include a protective layer. The laminated sheet of the present disclosure may include, for example, a base material layer, a concealing layer, a receiving layer, and a protective layer in this order, or may include a base material layer, a concealing layer, a receiving layer on which an image is formed, and a protective layer in this order.

[0052] As a material constituting the protective layer, for example, a resin material can be used. Examples of the resin material include polyester, polyamide, polyurethane, polycarbonate, vinyl resin, styrene resin, acrylic resin, acrylic polyol resin, cellulose resin, phenoxy resin, epoxy resin, a resin obtained by silicone-modifying each of these resins, an ultraviolet ray absorbing resin, and an ionizing radiation curable resin.

[0053] Examples of the polyester include polyethylene terephthalate and polyethylene naphthalate. Examples of the vinyl resin include vinyl chloride-vinyl acetate copolymer, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polyvinyl acetal, and polyvinyl pyrrolidone. Examples of the cellulose resin include ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxycellulose, methyl cellulose, and cellulose acetate.

[0054] Examples of the radiation-curable resin include resins obtained by crosslinking and curing a radically polymerizable polymer or oligomer by irradiation with ionizing radiation. Specifically, examples include resins obtained by adding a photoinitiator to a radically polymerizable polymer or oligomer as necessary and subjecting it to polymerization crosslinking by electron beam or ultraviolet irradiation.

[0055] The content ratio of the resin material in the protective layer is preferably 80% by mass or more, more preferably 85% by mass or more, based on the total mass of the protective layer. Thereby, for example, sufficient durability can be imparted to the protective layer.

[0056] The protective layer may contain an additive. Examples of the additive include an ultraviolet absorber, a light stabilizer, an antioxidant, a colorant, a filler, and a mold release agent. The protective layer may contain a colorant as necessary. The protective layer may contain a colorant in order to adjust the color tone of the laminated sheet to a desired color such as a skin color. Examples of the colorant include pigments and dyes.

[0057] The content ratio of the additive in the protective layer is preferably 1% by mass or more, more preferably 2% by mass or more, based on the total mass of the protective layer, and is preferably 20% by mass or less, more preferably 15% by mass or less. The content ratio of the additive in the protective layer is, for example, 1% by mass or more and 20% by mass or less.

[0058] The thickness of the protective layer is preferably 0.1 μm or more, more preferably 0.5 μm or more, still more preferably 1 μm or more, and is preferably 20 μm or less, more preferably 10 μm or less, still more preferably 5 μm or less. Such a protective layer can impart, for example, a sufficient protective function to the laminated sheet. The thickness of the protective layer is, for example, 0.1 μm or more and 20 μm or less.

[0059] The protective layer can be formed, for example, by applying a coating liquid containing the above material to a receiving layer or the like by known means such as roll coating, reverse roll coating, gravure coating, reverse gravure coating, bar coating, and rod coating, and then drying.

[0060] The protective layer can be formed, for example, by preparing a thermal transfer sheet having a protective layer, overlaying the thermal transfer sheet on a substrate film or the like corresponding to the substrate layer, and transferring the protective layer onto the receiving layer or the receiving layer on which an image is formed by a thermal transfer process.

[0061] (Adhesive layer) The laminated sheet of the present disclosure may include an adhesive layer. The laminated sheet of the present disclosure may include, for example, a release layer, an adhesive layer, a substrate layer, a concealing layer, a receiving layer, and a receiving layer on which an image is formed, in this order. The release layer will be described later.

[0062] The adhesive layer is formed, for example, using an adhesive. The adhesive, also called a pressure-sensitive adhesive, is a material that has adhesiveness at room temperature and can adhere to an adherend by applying pressure. For example, even when the adherend adhered to the adhesive layer is peeled off, the adhesive layer retains a practical adhesive force.

[0063] Examples of the adhesive include acrylic adhesives, urethane adhesives, silicone adhesives, rubber adhesives, vinyl alkyl ether adhesives, polyester adhesives, polyamide adhesives, and fluorine adhesives. The adhesive may contain a solvent. As the solvent, for example, either aqueous or solvent-based can be used. As the adhesive, it is preferable to select an adhesive that causes less skin rash and irritation to the skin for medical use. For example, acrylic adhesives and urethane adhesives are preferable.

[0064] The adhesive layer may contain additives. Examples of the additives include ultraviolet absorbers, light stabilizers, antioxidants, colorants, fillers, and release agents. The adhesive layer may contain a colorant as necessary. The adhesive layer may contain a colorant in order to adjust the color tone of the laminated sheet to a desired color such as skin color. Examples of the colorant include pigments and dyes.

[0065] The adhesive strength of the adhesive layer is preferably 5000 gf / 50 mm or less, more preferably 100 gf / 50 mm or more and 5000 gf / 50 mm or less. If the adhesive strength is 5000 gf / 50 mm or less, for example, when the sheet adheres incorrectly or is peeled off during replacement, there is little risk of hurting the adherend (especially the human body or animal skin). If the adhesive strength is 100 gf / 50 mm or more, for example, the adhesive strength to the adherend (especially the human body or animal skin) can be ensured, and peeling of the sheet due to sweating or movement of the skin can be suppressed.

[0066] The thickness of the adhesive layer is preferably 3 μm or more, more preferably 5 μm or more, preferably 40 μm or less, and more preferably 30 μm or less. The thickness of the adhesive layer is, for example, 3 μm or more and 40 μm or less.

[0067] (Release sheet) The laminated sheet of the present disclosure may include a release sheet. The laminated sheet of the present disclosure may include, for example, a release layer, an adhesive layer, a base material layer, a concealing layer, a receiving layer, and a receiving layer on which an image is formed, in this order.

[0068] Examples of the release sheet include release paper in which at least one side of a paper base material is subjected to a release treatment, and a resin film in which at least one side of a resin film is subjected to a release treatment. Examples of the release treatment include a release treatment using a release agent such as a silicone resin-based release agent, an alkyd resin-based release agent, a long-chain alkyl compound-based release agent, and a fluororesin-based release agent. Examples of the resin film include a resin film formed from a resin material such as polyolefin, vinyl resin, styrene resin, acrylic resin, fluororesin, polyester, and polyamide.

[0069] The thickness of the release sheet is preferably 50 μm or more, more preferably 100 μm or more, preferably 300 μm or less, and more preferably 200 μm or less. The thickness of the release sheet is, for example, 50 μm or more and 300 μm or less.

[0070] (Protective sheet) The laminated sheet of the present disclosure may include a protective sheet detachably provided on a base material layer. Examples of the protective sheet include a low-density polyethylene (LDPE) sheet and a polypropylene (PP) sheet. The protective sheet is provided with, for example, a weak adhesive layer. For forming the weak adhesive layer, an acrylic-based weak adhesive and a urethane-based weak adhesive can be used. The thickness of the protective sheet is, for example, 10 μm or more and 200 μm or less.

[0071] <Laminated sheet> The laminated sheet of the present disclosure has a tensile test force at 5% elongation of the laminated sheet obtained by a test method conforming to JIS K7127:1999 of 0.10 N or more and 0.62 N or less. If the tensile test force is within the above range, generation of wrinkles when the laminated sheet is attached to the skin can be suppressed, and thus it can be used as a skin design sheet having a natural appearance. Further, when the tensile test force is 0.10 N or more and 0.42 N or less, generation of wrinkles when attached to the skin can be more effectively suppressed.

[0072] As a result of intensive studies, the inventors of the present application have found that the tensile test force at 5% elongation of the laminated sheet is affected by the thickness of the concealing layer constituting the laminated sheet and the content ratio of the white pigment in the concealing layer. Specifically, when the thickness of the concealing layer and the content ratio of the white pigment are increased, the tensile test force of the laminated sheet increases. And when the tensile test force exceeds 0.6 N, wrinkles occur when the laminated sheet is attached to the skin. On the one hand, when the thickness of the hiding layer and the content ratio of the white pigment are decreased, the tensile test force of the laminated sheet decreases. As a result, when the laminated sheet is attached to the skin, the generation of wrinkles can be suppressed, but the hiding rate of the hiding layer decreases.

[0073] The total thickness of the laminated sheet of the present disclosure, which is composed of a base material layer, a hiding layer, and a receiving layer, is preferably 4.0 μm or more, more preferably 6.0 μm or more, preferably 15.0 μm or less, and more preferably 10.0 μm or less. The total thickness of the laminated sheet is, for example, 4.0 μm or more and 15.0 μm or less. When the total thickness of the laminated sheet is within the above range, the tensile test force at 5% elongation is likely to satisfy the above-described requirements.

[0074] [Use of the laminated sheet] Hereinafter, an example of the use of the laminated sheet of the present disclosure will be described. In one embodiment, the laminated sheet can be used as a skin design sheet (skin sheet) for attaching to the skin by forming an image on the receiving layer. Examples of the skin design sheet include a skin hiding sheet and a tattoo seal.

[0075] In one embodiment, a skin design sheet can be produced from the laminated sheet. For example, a plurality of skin design sheets may be produced from the laminated sheet. For example, a roll-shaped laminated sheet may be cut to produce a sheet-shaped laminated sheet in a product form.

[0076] By attaching the skin design sheet to skin with blemishes such as stains, birthmarks, freckles, wrinkles, sagging, pores, scars, acne marks, burn marks, and discoloration due to skin diseases so that its adhesive layer contacts the skin, these blemishes can be hidden and made less noticeable.

[0077] In addition, by producing a skin design sheet by on-demand printing from a photographed image of the user on the laminated sheet, the color of the skin design sheet can be matched to the color of the user's natural skin. Thereby, the sense of incongruity when the skin design sheet is attached to the user's skin can be suppressed.

[0078] [Manufacturing method of skin design sheet] The skin design sheet of the present disclosure can be produced, for example, by a thermal transfer process. A long base film corresponding to the laminate sheet of the present disclosure is prepared. The base film may have an adhesive layer and a release sheet. The base film and the thermal transfer sheet are set in a thermal transfer printer.

[0079] The thermal transfer sheet comprises a substrate, a transfer type receiving layer, a dye layer and an optional protective layer, which are provided in face order on one side of the substrate. The receiving layer is a layer that receives the dye transferred from the thermal transfer sheet, and is transparent. Examples of the dye layer include a yellow dye layer, a magenta dye layer and a cyan dye layer. The dye layer contains a binder resin and a sublimation dye. Known materials can be used for the yellow dye layer, the magenta dye layer and the cyan dye layer. Details of the receiving layer and the protective layer are as described above. If a receiving layer is provided on the substrate film in advance, it is not necessary for the thermal transfer sheet to have a receiving layer, and it is not necessary to transfer the receiving layer as described below.

[0080] The thermal transfer printer has a thermal head and a platen roll that sandwich the base film and the thermal transfer sheet, and heats the thermal transfer sheet. The thermal head heats the receptor layer of the transfer mold to transfer the receptor layer onto the base film. Next, the thermal head sequentially heats the yellow dye layer, the magenta dye layer, and the cyan dye layer based on, for example, the data of the skin design sheet, and transfers the dye to the receptor layer transferred onto the base film to form an image. This makes it easy to match the color of the laminated sheet to the color of the user's skin. If necessary, the protective layer of the thermal transfer sheet is then heated and transferred onto the receptor layer on which the image has been formed.

[0081] If necessary, shaping treatment such as embossing may be performed on the surface of the base film to form an uneven shape. In embossing, for example, an embossing plate or a shaping sheet can be used. The embossing plate and the shaping sheet can be used without particular limitation. The surface shape of the embossing plate and the shaping sheet and the surface shape shaped thereby have substantially opposite shapes.

[0082] The long laminated sheet is cut parallel to the width direction of the laminated sheet by a cutter in a thermal transfer printer to obtain a single-sheet laminated sheet. A protective sheet may be attached to the surface resin layer of the single-sheet laminated sheet if necessary.

[0083] Next, using a known cutting device, the above laminated sheet is cut into the shape of the product form of the skin design sheet. For example, when the laminated sheet is viewed in plan, the laminated sheet is punched into a circular shape. The above shape is not particularly limited.

[0084] In the above manner, a skin design sheet having a desired shape can be produced. In the above method, the adhesive layer may be provided on the base film after the thermal transfer process. In this case, it is preferable to provide a release sheet after the formation of the adhesive layer.

[0085] Although the method for manufacturing the skin design sheet by the thermal transfer process has been described, the manufacturing method of the skin design sheet of the present disclosure is not limited to the above method at all. For example, the skin design sheet may be manufactured by sequentially forming each layer of the laminated sheet.

[0086] Also, in the manufacturing method of the skin design sheet of the present disclosure, although the mode of using a thermal transfer printer (thermal printer) has been described, it is not limited thereto. As the printer, a thermal transfer printer, an inkjet printer, etc. can be used. Among these, a thermal transfer printer is preferable. As the thermal transfer printer, a sublimation type thermal transfer printer excellent in color reproducibility and gradation is preferable.

[0087] The present disclosure relates to, for example, the following [1] to [7]. [1] A laminated sheet including at least a receiving layer, a concealing layer, and a base material layer, in this order, wherein a tensile test force at 5% elongation of the laminated sheet obtained by a test method conforming to JIS K7127:1999 is 0.10 N or more and 0.62 N or less. [2] The laminated sheet according to [1], wherein the thickness of the concealing layer is 0.8 μm or more and 6 μm or less. [3] The concealing layer contains a white pigment, and the content ratio of the white pigment in the concealing layer is 40% by mass or more and 85% by mass or less. The laminated sheet according to [1] or [2]. [4] The laminated sheet according to [3], wherein the white pigment is titanium oxide. [5] The laminated sheet according to any one of [1] to [4], wherein the tensile test force is 0.10 N or more and 0.42 N or less. [6] The laminated sheet according to any one of [1] to [5], further including an adhesive layer and a release sheet on a side of the base material layer opposite to the receiving layer. [7] A skin decorative sheet including the laminated sheet according to any one of [1] to [6], wherein an image is formed on the receiving layer.

Examples

[0088] The laminated sheet of the present disclosure will be described in more detail with reference to examples, but the laminated sheet of the present disclosure is not limited to these examples. In the following description, "parts" means "parts by mass".

[0089] [Example 1] As a base material layer, a polyurethane film with a thickness of 7 μm was prepared. A coating liquid 1 for forming a concealing layer with the following composition was applied at a coating amount of 1.0 g / m 2 and dried on one surface of the base material layer to form a concealing layer 1 with a thickness of 1 μm. The concealing layer 1 had a white pigment ratio of 58% by mass and a concealment rate of 21%. Next, a coating liquid for forming a receiving layer having the following composition was applied and dried on the hidden layer 1 to form a receiving layer with a thickness of 1.0 μm. In this way, a laminated sheet with a total thickness of 9.0 μm was obtained.

[0090] (Coating Liquid 1 for Forming Hidden Layer) · 58 parts of titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., R-780) · 10.5 parts of (meth)acrylic resin (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-87) · 31.5 parts of (meth)acrylic resin (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-85) · 100 parts of methyl ethyl ketone (MEK) · 100 parts of toluene

[0091] (Coating Liquid for Forming Receiving Layer) · 100 parts of vinyl chloride-vinyl acetate copolymer (1000A, manufactured by Denki Kagaku Kogyo Kabushiki Kaisha) · 3.5 parts of epoxy-modified silicone (X-22-3000T, manufactured by Shin-Etsu Chemical Co., Ltd.) · 3.5 parts of methylstyrene-modified silicone (X-24-510, manufactured by Shin-Etsu Chemical Co., Ltd.) · 2.5 parts of polyether-modified silicone (FZ2101, manufactured by Nippon Unicar Co., Ltd.) · 200 parts of methyl ethyl ketone (MEK) · 200 parts of toluene

[0092] [Example 2] A laminated sheet with a total thickness of 10.0 μm was produced in the same manner as in Example 1, except that Coating Liquid 1 for Forming Hidden Layer was applied and dried at an application amount of 2.0 g / m 2 to form a hidden layer 2 with a thickness of 2 μm. The hidden layer 2 had a white pigment ratio of 58% by mass and a hiding power of 35%.

[0093] [Example 3] Coating Liquid 1 for Forming Hidden Layer was applied at an application amount of 3.0 g / m 2Except that it was applied and dried with [the coating liquid] to form a concealing layer 3 with a thickness of 3 μm, a laminated sheet with a total thickness of 11.0 μm was produced in the same manner as in Example 1. Note that the concealing layer 3 had a white pigment ratio of 58% by mass and a concealment rate of 42%.

[0094] [Example 4] The coating liquid 1 for forming a concealing layer was applied at an application amount of 4.0 g / m 2 Except that it was applied and dried with [the coating liquid] to form a concealing layer 4 with a thickness of 4 μm, a laminated sheet with a total thickness of 12.0 μm was produced in the same manner as in Example 1. Note that the concealing layer 4 had a white pigment ratio of 58% by mass and a concealment rate of 52%.

[0095] [Example 5] On one surface of the base material layer, a coating liquid for forming an adhesive layer having the following composition was applied at an application amount of 0.5 g / m 2 and dried to form an adhesive layer. On the above adhesive layer, a coating liquid 2 for forming a concealing layer having the following composition was applied at an application amount of 2.0 g / m 2 and dried to form a concealing layer 5 with a thickness of 2 μm. Except for this, a laminated sheet with a total thickness of 10.0 μm was produced in the same manner as in Example 1. Note that the concealing layer 5 had a white pigment ratio of 85% by mass and a concealment rate of 68%.

[0096] (Coating liquid for forming an adhesive layer) · (Meth)acrylic resin 40 parts (manufactured by JSR Corporation, AE866) · Polyester 34 parts (manufactured by Toyobo Co., Ltd., Vylon (registered trademark) MD - 1200) · Isopropyl alcohol (IPA) 100 parts · Water 100 parts

[0097] (Coating liquid 2 for forming a concealing layer) · Titanium oxide 85 parts (manufactured by Ishihara Sangyo Co., Ltd., R - 780) · (Meth)acrylic resin 12 parts (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR - 87) · (Meth)acrylic resin 2 parts (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR - 85) · Polyester 1 part (Manufactured by Toyobo Co., Ltd., BYRON (registered trademark) 200, Tg: 67°C, Mn: 17,000) · 33 parts of methyl ethyl ketone (MEK) · 33 parts of toluene

[0098] Test Example 6 Coated and dried the coating liquid 1 for forming a hidden layer at an application amount of 0.6 g / m 2 In the same manner as in Example 1 except that a hidden layer 6 with a thickness of 0.6 μm was formed by coating and drying, a laminated sheet with a total thickness of 8.6 μm was produced. The hidden layer 6 had a white pigment ratio of 58% by mass and a hiding power of 10%.

[0099] [Example 7] On the base material of the transfer sheet, the coating liquid 2 for forming a hidden layer was applied and dried at an application amount of 2.0 g / m 2 to form a hidden layer 5 with a thickness of 2 μm. Then, the coating liquid for forming an adhesive layer was applied and dried on the hidden layer 5 at an application amount of 0.5 g / m2 to form an adhesive layer. Next, the above adhesive layer and hidden layer 5 were transferred onto the hidden layer 1 of Example 1 to form a hidden layer 7 (hidden layer 1 + hidden layer 5) with a thickness of 3 μm. In the same manner as in Example 1 except for this, a laminated sheet with a total thickness of 11.0 μm was created. The hidden layer 7 had a white pigment ratio of 76% by mass and a hiding power of 80%.

[0100] Test Example 8 On one surface of the base material layer, the coating liquid 3 for forming a hidden layer with the following composition was applied and dried at an application amount of 2.0 g / m 2 to form a hidden layer 8 with a thickness of 2 μm. In the same manner as in Example 1 except for this, a laminated sheet with a total thickness of 10.0 μm was produced. The hidden layer 8 had a white pigment ratio of 30% by mass and a hiding power of 13%.

[0101] (Coating liquid 3 for forming a hidden layer) · 30 parts of titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., R-780) · 17.5 parts of (meth)acrylic resin ​​(Manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-87) · 52.5 parts of (meth)acrylic resin (Manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-85) · 100 parts of methyl ethyl ketone (MEK) · 100 parts of toluene

[0102] [Example 9] A laminated sheet with a total thickness of 12.0 μm was produced in the same manner as in Example 1, except that the thickness of the base material layer was changed to 10 μm.

[0103] [Example 10] A laminated sheet with a total thickness of 7.0 μm was produced in the same manner as in Example 1, except that the thickness of the base material layer was changed to 5 μm.

[0104] [Example 11] A laminated sheet with a total thickness of 14.0 μm was produced in the same manner as in Example 3, except that the thickness of the base material layer was changed to 10 μm.

[0105] [Example 12] A laminated sheet with a total thickness of 8.0 μm was produced in the same manner as in Example 5, except that the thickness of the base material layer was changed to 5 μm.

[0106] [Example 13] A laminated sheet with a total thickness of 5.0 μm was produced in the same manner as in Example 1, except that the thickness of the base material layer was changed to 3 μm.

[0107] [Comparative Example 1] A laminated sheet with a total thickness of 15.0 μm was produced in the same manner as in Example 4, except that the thickness of the base material layer was changed to 10 μm.

[0108] [Comparative Example 2] A laminated sheet with a total thickness of 27.0 μm was produced in the same manner as in Example 1, except that the thickness of the base material layer was changed to 25 μm.

[0109] [Comparative Example 3] A laminated sheet with a total thickness of 6.0 μm was produced in the same manner as in Example 1, except that the thickness of the base material layer was changed to 5 μm and no hiding layer was provided.

[0110] [Comparative Example 4] A laminated sheet with a total thickness of 16.0 μm was produced in the same manner as in Example 1, except that a coating liquid 1 for forming a hiding layer was applied and dried at an application amount of 8.0 g / m 2 to form a hiding layer 9 with a thickness of 8 μm. The hiding layer 9 had a white pigment ratio of 58% by mass and a hiding rate of 90%.

[0111] [Comparative Example 5] On one surface of the base material layer, a coating liquid 4 for forming a hiding layer having the following composition was applied and dried at an application amount of 2.0 g / m 2 to form a hiding layer 10 with a thickness of 2 μm. A laminated sheet with a total thickness of 10.0 μm was produced in the same manner as in Example 1. The hiding layer 10 had a white pigment ratio of 90% by mass and a hiding rate of 72%.

[0112] (Coating Liquid 4 for Forming Hiding Layer) · 90 parts of titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., R-780) · 7.0 parts of (meth)acrylic resin (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-87) · 3.0 parts of (meth)acrylic resin (manufactured by Mitsubishi Chemical Corporation, Dianal (registered trademark) BR-85) · 100 parts of methyl ethyl ketone (MEK) · 100 parts of toluene

[0113] [Measurement Method] <Hiding Rate of Hiding Layer> The hiding rate (YB / YW) of the hiding layer obtained by a test method conforming to JIS K5600-4-1 (Hiding Power: for Light Color Paints) was determined. Specifically, in the laminated sheets of Examples 1 to 13 and Comparative Examples 1 to 5, those with an adhesive layer having a thickness of 10 μm formed on the side opposite to the receiving layer of the base material layer using an acrylic adhesive (manufactured by Soken Chemical & Engineering Co., Ltd., SK Dyn MD-1) were pasted onto a concealer rate test paper (AS ONE 1-3783-01), and the tristimulus values YB (Y value of the film pasted on the black part) and YW (Y value of the film pasted on the white part) were measured and calculated respectively.

[0114] <Tensile test force at 5% elongation of the laminated sheet> The tensile test force at 5% elongation of the laminated sheet was determined by a test method compliant with JIS K7127:1999 (Plastics - Test methods for tensile properties -). Note that the tensile test force was measured for a laminated sheet composed of three layers, namely the base material layer, the concealer layer, and the receiving layer, using a small bench-top testing machine (EZ Test series, manufactured by Shimadzu Corporation) as the measuring instrument. · Test piece: Type 2, width 10 mm · Initial chuck interval: 40 mm · Test speed: 10 mm / min

[0115] [Evaluation method] <Wrinkles during pasting> In the laminated sheets of Examples 1 to 13 and Comparative Examples 1 to 5, using those with an adhesive layer having a thickness of 10 μm formed on the side opposite to the receiving layer of the base material layer using an acrylic adhesive (manufactured by Soken Chemical & Engineering Co., Ltd., SK Dyn MD-1), the following evaluations were conducted.

[0116] The level of wrinkles when the laminated sheet was pasted on the skin was evaluated according to the following evaluation criteria. The average score of the evaluations by 5 people being 2.5 or more was rated as A, 1.1 or more and less than 2.5 as B, and less than 1.1 as C. (Evaluation criteria) 3: Wrinkles are not obvious, good 2: Some wrinkles can be confirmed 1: Wrinkles are obvious

[0117] <Stain concealment> The hiding rate of the hiding layer constituting the laminated sheet was evaluated according to the following evaluation criteria. (Evaluation Criteria) A: Hiding rate of 40% or more B: Hiding rate of more than 15% and less than 40% C: Hiding rate of less than 15%

[0118] The above evaluation results are shown in Table 1.

[0119]

Table 1

Explanation of Symbols

[0120] 1 Laminated sheet 10 Base material layer 20 Hiding layer 30 Receiving layer

Claims

1. A laminated sheet comprising at least a receiving layer, a concealing layer, and a base material layer in this order, wherein the concealing layer contains a white pigment, the content ratio of the white pigment in the concealing layer is 40% by mass or more and 85% by mass or less, the thickness of the concealing layer is 0.8 μm or more and 6 μm or less, the concealing layer has a concealing rate (YB / YW) of 15% or more obtained by a test method compliant with JIS K5600-4-1 (Concealing power: for light-colored paints), a laminated sheet, wherein the tensile test force at 5% elongation of the laminated sheet at a width of 10 mm obtained by a test method compliant with JIS K7127:1999 is 0.10 N or more and 0.62 N or less.

2. The laminated sheet according to Claim 1, wherein the white pigment is titanium oxide.

3. The laminated sheet according to Claim 1, wherein the tensile test force is 0.10 N or more and 0.42 N or less.

4. The laminated sheet according to Claim 1, further comprising an adhesive layer and a release sheet on the side of the base material layer opposite to the receiving layer.

5. A skin design sheet comprising the laminated sheet according to any one of Claims 1 to 4, wherein an image is formed on the receiving layer.

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