Skin design sheet and method for manufacturing skin design sheet

Abstract

To provide a skin design sheet that facilitates peeling of a release sheet and a cover sheet, and a method of manufacturing the same.SOLUTION: A skin design sheet comprises: a laminate in which a release sheet, a first adhesive layer, a stretchable sheet and a reception layer formed with a skin design image are stacked in order; a second adhesive layer that is provided on the reception layer; and a cover sheet that is provided on the second adhesive layer. A part of a marginal part of the skin design sheet serves as a knob part for starting peeling of the cover sheet, in which the second adhesive layer is not stuck on the laminate. The marginal part on the other side of the knob part assumes a cuspidal shape.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a skin design sheet and a method for manufacturing the skin design sheet. [Background technology]

[0002] Skin design sheets, such as tattoo stickers and skin concealing sheets, are known for application to the skin. Tattoo stickers with various designs printed on them are sold at variety stores, sporting and music event venues, amusement parks, etc., and are used to liven up the atmosphere.

[0003] Skin-concealing sheets are sheets in which a base material is pre-colored with a predetermined color by screen printing or the like, and are used to conceal discoloration on the skin, such as scratches and blemishes. Users choose one that matches their skin color. For example, a skin-concealing sheet is made up of a release sheet, an adhesive layer, an elastic base material, and a cover sheet, laminated in this order, and is used by peeling off the release sheet, adhering the adhesive layer to the skin, and then peeling off the cover sheet.

[0004] Users have been demanding skin concealing sheets that are easy to handle and have release sheets and cover sheets that are easy to peel off. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-252400 [Patent Document 2] Patent No. 4672799 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present disclosure is to provide a skin-design sheet from which a release sheet or cover sheet can be easily peeled off, and a method for producing the same. [Means for solving the problem]

[0007] The skin design sheet of the present disclosure is a skin design sheet comprising a laminate in which a release sheet, a first adhesive layer, an elastic sheet, and a receiving layer on which a skin design image is formed are laminated in that order, a second adhesive layer provided on the receiving layer, and a cover sheet provided on the second adhesive layer, wherein a portion of the edge of the skin design sheet is a tab for initiating peeling of the cover sheet, where the second adhesive layer is not attached to the laminate, and the edge opposite the tab is pointed.

[0008] The method for manufacturing a skin design sheet of the present disclosure comprises the steps of preparing an image receiving sheet in which a release sheet, a first adhesive layer, and an elastic sheet are laminated, transferring a receiving layer onto the elastic sheet of the image receiving sheet, forming a skin design image on the receiving layer to form a laminate in which the image receiving sheet and the receiving layer are laminated, attaching a cover sheet to the receiving layer of the laminate via a second adhesive layer to produce a laminate with a cover sheet, and cutting the laminate with the cover sheet to produce a plurality of skin design sheets, each of which has a portion of its edge that serves as a tab for starting to peel off the cover sheet, where the second adhesive layer is not attached to the laminate, and the edge opposite the tab is pointed. [Effects of the Invention]

[0009] According to the present disclosure, the release sheet and cover sheet are easy to peel off, making the skin design sheet easy to handle. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a cross-sectional view of an image-receiving sheet. [Figure 2] FIG. 2 is a plan view of a thermal transfer sheet. [Figure 3] FIG. [Figure 4] FIG. 2 is a cross-sectional view of a skin design sheet. [Figure 5] FIG. 2 is a top view of the skin design sheet. [Figure 6] FIG. 10 is a diagram illustrating how to use the skin design sheet. [Figure 7] FIG. 10 is a diagram illustrating how to use the skin design sheet. [Figure 8] 1A to 1C are diagrams illustrating a method for manufacturing a skin design sheet. [Figure 9] 9A and 9B are diagrams illustrating a method for manufacturing a skin-design sheet. [Figure 10] 10A and 10B are diagrams for explaining the position of the knob. [Figure 11] 11A and 11B are diagrams for explaining the position of the knob. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1 is a cross-sectional view of an image-receiving sheet 20 used in the manufacture of a skin-design sheet according to an embodiment of the present disclosure. The image-receiving sheet 20 has a release sheet 21, a first adhesive layer 22, and a stretchable sheet 23 laminated in this order.

[0012] Release paper or the like that has been subjected to a silicone release treatment or the like can be used as the release sheet 21. The thickness of the release sheet is preferably about 130 μm or more and 210 μm or less. The bending resistance of the release sheet is preferably 150 mg or more and 2500 mg or less.

[0013] The surface of the release sheet (the surface on which the adhesive layer is provided) preferably has a plurality of recesses (dimples). The planar shape of the recesses is approximately circular with a diameter of approximately 2 mm to 3 mm. The recesses occupy approximately 3% to 20% of the surface of the release sheet. The bottoms of the recesses are curved, and the depth of the deepest part is approximately 1 μm to 17 μm. By forming such recesses on the surface of the release sheet, the peel force between the release sheet and the first adhesive layer can be adjusted to an appropriate value.

[0014] For the first adhesive layer 22, a urethane or acrylic adhesive that is less likely to cause rash or inflammation on the skin is preferably used. Furthermore, a gel-type adhesive is preferred to ensure adhesion to the skin. The thickness of the first adhesive layer is, for example, 15 μm or more and 30 μm or less.

[0015] For example, a urethane sheet can be used as the stretchable sheet 23. The stretchable sheet preferably has an elongation rate of approximately 30% to 100%, more preferably approximately 60%, so that it can follow the expansion and contraction of the skin when attached.

[0016] The elongation percentage of the stretchable sheet is determined by a test method conforming to JIS-K-7127 (1999). The elongation percentage can be calculated using the following formula (1). Elongation (%) = 100 × (L - L0) / L0 Equation (1)

[0017] In formula (1), L is the length at which the stretchable sheet breaks (ruptures) when it is pulled at a speed of 200 mm / min using a tensile tester. L0 in formula (1) is the length of the recorded portion before being pulled by the tensile tester. A Tensilon universal material testing machine or the like can be used as the tensile tester.

[0018] In addition, to allow permeation of sweat vapor from the skin, 1000g / (m 2 It is preferable that the material has a moisture permeability of at least 24 hours.

[0019] The thickness of the stretchable sheet is preferably 5 μm or more, more preferably 7 μm or more, to prevent wrinkles during application and to improve workability, and is preferably 30 μm or less to prevent discomfort during application.

[0020] Such an image-receiving sheet 20 is set in a thermal transfer printer equipped with a thermal head, etc. Fig. 2 is a plan view of the thermal transfer sheet 10 used in the thermal transfer printer.

[0021] The thermal transfer sheet 10 has a transfer-type receiving layer 11, a yellow dye layer 12, a magenta dye layer 13, a cyan dye layer 14, and a protective layer 15 formed in face order on one side of a base sheet (not shown). The receiving layer 11 is a transparent layer that receives the dyes that migrate from the thermal transfer sheet 10. The yellow dye layer 12, the magenta dye layer 13, and the cyan dye layer 14 contain a binder resin and a sublimable dye. Known materials can be used for the yellow dye layer 12, the magenta dye layer 13, and the cyan dye layer 14.

[0022] Examples of resins for forming the receiving layer 11 include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, and polyvinylidene chloride, vinyl polymers such as polyvinyl acetate, ethylene-vinyl acetate copolymer, and polyacrylic ester, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polyamide resins, copolymer resins of olefins such as ethylene and propylene with other vinyl monomers, ionomers, cellulose resins such as cellulose diacetate, polycarbonate resins, polyvinyl acetal resins, and polyvinyl alcohol resins.

[0023] A transparent resin material can be used for the protective layer 15. Furthermore, the protective layer 15 is preferably matte with low surface reflectance to prevent shine when applied to the skin. Here, "matte" refers to a state with a glossiness of 40% or less. The glossiness is measured using a gloss meter at an incident angle of 45°.

[0024] The thermal head of the thermal transfer printer heats the thermal transfer sheet 10, and transfers the receptor layer 11 onto the stretchable sheet 23 of the image-receiving sheet 20, as shown in FIG.

[0025] Next, the thermal head heats the yellow dye layer 12, the magenta dye layer 13 and the cyan dye layer 14 in order based on the data of the skin design sheet, transferring the dyes to the receiving layer 11 on the image receiving sheet 20 to form a skin design image.

[0026] Next, the thermal head heats the protective layer 15 of the thermal transfer sheet 10, and transfers the protective layer 15 onto the receiving layer 11 on which the skin design image is formed. This produces a laminate 1 (skin design sheet) in which the first adhesive layer 22, the stretchable sheet 23, the receiving layer 11 on which the skin design image is formed, and the protective layer 15 are laminated in this order on the release sheet 21.

[0027] 4, a cover sheet 30 is attached onto the protective layer 15 of the laminate 1. A second adhesive layer 40 is provided on one surface of the cover sheet 30, and the cover sheet 30 is attached onto the protective layer 15 using the second adhesive layer 40.

[0028] A plastic base material such as polyethylene terephthalate can be used as the cover sheet 30. The thickness of the cover sheet 30 is approximately 20 μm or more and 100 μm or less.

[0029] The second adhesive layer 40 can use the same adhesive as the first adhesive layer 22. The second adhesive layer 40 has a stronger adhesive strength to the cover sheet 30 than to the protective layer 15. The thickness of the second adhesive layer is, for example, 1 μm or more and 30 μm or less.

[0030] 4, there is a portion at the end of the cover sheet 30 on one side where the second adhesive layer 40 is not provided, and this portion becomes a gripping portion 31 of the cover sheet 30, which will be described later. The second adhesive layer 40 is provided on one side of the cover sheet 30 other than the gripping portion 31. The second adhesive layer 40 is not provided on the gripping portion 31, and one side of the cover sheet 30 faces the upper surface of the protective layer 15.

[0031] Next, using a known cutting device, the laminate 1 with the cover sheet 30 is cut and processed into the shape of the product form of the skin design sheet. As shown in Figure 5, the shape of the cover sheet 30 in the product form of the skin design sheet is approximately circular in plan view, with part of the arc-shaped edge forming a tab 31, and the edge portion 32 on the opposite side of the tab 31 being pointed.

[0032] As shown in Figure 11A, cover sheet 30 has a shape symmetrical on either side of center line 70, and tab 31 and pointed edge 32 are preferably located on center line 70, but as shown in Figure 11B, tab 31 may be located at a position offset from center line 70. When viewed from a line 71 that passes through center point P of the circle that forms the arc of cover sheet 30 and is perpendicular to center line 70, pointed edge 32 is preferably located on one half side (one region) of cover sheet 30, and tab 31 is located on the other half side (the other region).

[0033] In other words, the above-mentioned "the edge portion 32 opposite the gripping portion 31 is pointed" means that when the cover sheet 30 is divided into two regions along the straight line 71, the gripping portion 31 and the pointed edge portion 32 are located in different regions.

[0034] A laminate 1 including a release sheet 21, a first adhesive layer 22, an elastic sheet 23, a receiving layer 11 and a protective layer 15 is attached to one side of the cover sheet 30 via a second adhesive layer 40 provided in an area other than the gripping portion 31.

[0035] When using the skin design sheet, first, as shown in Figure 6, peel off the release sheet 21 to expose the first adhesive layer 22. The release sheet 21 can be easily peeled off by peeling it off from the pointed portion on the edge portion 32 side.

[0036] Next, as shown in Figure 7, the skin design sheet is positioned so as to cover the discolored area S of the skin, and is attached to the skin using the first adhesive layer 22. Then, the tab 31 is grasped and the cover sheet 30 is peeled off. The second adhesive layer 40 is peeled off together with the cover sheet 30, and does not remain on the protective layer 15. The provision of the tab 31 for starting peeling makes it easy to peel off the cover sheet 30.

[0037] In this way, the skin design sheet according to this embodiment is easy to handle, as the release sheet and cover sheet are easy to peel off.

[0038] The area of ​​the gripping portion 31 shown in Fig. 5 is preferably 3% to 20% of the entire area of ​​the cover sheet 30, and more preferably 5% to 10%. By making the area of ​​the gripping portion 31 3% or more of the entire area of ​​the cover sheet 30, the gripping portion 31 becomes easier to grip, and the cover sheet 30 can be easily peeled off. By making the area of ​​the gripping portion 31 20% or less of the entire area of ​​the cover sheet 30, it is possible to prevent wrinkles from forming in the stretchable sheet 23 when the skin-design sheet is attached to the skin.

[0039] In the cover sheet 30, the tab 31 may be a different color from the area other than the tab 31. By making the color difference ΔE between the tab 31 and the area other than the tab 31 5 or more, the tab 31 becomes easier to see.

[0040] The intersection angle θ between one edge 33 and the other edge 34, which sandwich the tip of the pointed edge portion 32, is preferably 30° or more and 120° or less, and more preferably 45° or more and 90° or less. By making the intersection angle θ 30° or more, the pointed portion becomes less noticeable when the skin design sheet is applied to the skin. By making the intersection angle θ 120° or less, the release sheet 21 can be easily peeled off when using the skin design sheet.

[0041] Before being cut and processed into a product form, the laminate 1 with the cover sheet 30 may have an outer peripheral shape in a top view that is a series of three arcs 51, as shown in Fig. 8. By cutting the laminate 1 with the cover sheet 30 in a radial direction from the center so as to divide it into three parts in line with the arcs 51, three sheets of texture-design sheets can be produced with an intersection angle θ of 120°.

[0042] As shown in Figure 9A, the outer peripheral shape in the top view of the laminate with cover sheet 30 is a series of four arcs 52, and by cutting radially from the center to divide it into four parts according to the arcs 52, four skin-design sheets can be produced with an intersection angle θ of 90°.

[0043] Similarly, by dividing the laminate with the cover sheet 30 having the outer peripheral shape as shown in Figure 9B into six parts, six skin design sheets with an intersection angle θ of 60° can be produced. In this way, multiple skin design sheets with an intersection angle θ of 360° divided by an integer can be easily produced.

[0044] 10A and 10B, multiple regions where the second pressure-sensitive adhesive layer 40 is not provided, which will become tabs 31 after cutting, may be positioned on the same straight line or in the same frame before cutting. This allows multiple tabs 31 to be produced collectively.

[0045] The cover sheet 30 may be attached after the laminate 1 is cut.

[0046] An adhesive may be applied onto the protective layer 15 of the laminate 1 to form the second adhesive layer 40, and then the cover sheet 30 may be attached onto the second adhesive layer 40. In this case, no adhesive is applied to a portion of the peripheral edge of the protective layer 15 (the area where the tab portion is to be formed), so that the upper surface of the protective layer 15 remains exposed.

[0047] Alternatively, the second adhesive layer 40 may be formed on one surface of the cover sheet 30, and the cover sheet 30 with the second adhesive layer 40 attached thereto may be attached onto the protective layer 15 of the laminate 1. In this case, the second adhesive layer 40 is not formed in the area that will become the tab 31.

[0048] In the above embodiment, a configuration in which the second adhesive layer 40 is not provided on the gripping portion 31 is described, but the second adhesive layer 40 may be provided on the entire surface of one side of the cover sheet 30, and tape or the like may be attached to the second adhesive layer 40 in the area that will become the gripping portion 31 to prevent the second adhesive layer 40 from sticking to the top surface of the laminate 1 (protective layer 15).

[0049] [Experimental Example] Preparation of the image receiving sheet An acrylic weak adhesive was applied to a release sheet (SLB-110WT, 170 μm thick, manufactured by Sumitomo Kakoshi Co., Ltd.) to form a first adhesive layer with a thickness of 30 μm. A urethane film (Silkron NES85, 15 μm thick, manufactured by Okura Kogyo Co., Ltd.) was attached to the first adhesive layer as a stretchable sheet to produce an image-receiving sheet in which the release sheet, first adhesive layer, and stretchable sheet were laminated in that order.

[0050] Fabrication of skin design sheet with cover sheet The image-receiving sheet was set in a thermal transfer printer (DS620, manufactured by Dai Nippon Printing Co., Ltd.), the receiving layer was transferred onto the urethane film, and images (R, G, B=127 / 255, 127 / 255, 127 / 255) were formed on the transferred receiving layer.

[0051] An acrylic weak adhesive was applied to the image-formed receiving layer in the area other than the area where the tab was to be formed, forming a second adhesive layer with a thickness of 30 μm. A cover sheet (Surface protection film for color steel sheets, SPV manufactured by Nitto Denko CS Systems Corporation) was placed on the second adhesive layer. TM The sheet was then cut with a cutter into the shapes shown in Figure 5 to produce skin-design sheets with cover sheets for Experimental Examples 1 to 17. In addition, a skin-concealing sheet with cover sheet for Comparative Example 1 was produced in which the edge on the opposite side of the tab was not pointed but was generally circular in plan view.

[0052] In the cover sheet-attached skin design sheets of Experimental Examples 1 to 7, the area of ​​the tab portion was 10% of the entire cover sheet, and the intersection angle θ was as shown in Table 1 below.

[0053] The cover sheet-attached skin design sheets of Experimental Examples 8 to 13 had an intersection angle θ of 90° and the areas of the tabs were as shown in Table 2 below.

[0054] The skin design sheets with cover sheets of Experimental Examples 14 to 17 have an intersection angle θ of 90°, the area of ​​the tab is 10% of the entire cover sheet, the tab is colored, and the color difference from the rest of the tab is shown in Table 3 below.

[0055] <<Evaluation of release sheet releasability>> The release sheets of the skin-design sheets with cover sheets of Experimental Examples 1 to 7 and Comparative Example 1 were peeled from the pointed portion, and the ease of peeling of the release sheets was evaluated based on the following evaluation criteria. The results are shown in Table 1.

[0056] "Evaluation Criteria" A: It was extremely easy to peel off. B: It was easy to peel off C: It was difficult to remove

[0057] <<Evaluation of the inconspicuousness of the pointed part>> The release sheets of the skin design sheets with cover sheets of Experimental Examples 1 to 7 and Comparative Example 1 were peeled off and applied to the skin, and the inconspicuousness of the pointed portion of the skin design sheet in the peeled-off state was evaluated based on the following evaluation criteria. The results are shown in Table 1.

[0058] "Evaluation Criteria" A: It wasn't noticeable at all. B: It wasn't very noticeable. C: Somewhat noticeable

[0059] [Table 1]

[0060] <<Cover sheet peelability evaluation>> The release sheet was peeled off from the skin-design sheets with cover sheets of Experimental Examples 8 to 13, and the sheets were applied to the skin. The ease of peeling the cover sheet when the cover sheet was pinched by the gripping portion and peeled off was evaluated based on the following evaluation criteria. The results are shown in Table 2.

[0061] "Evaluation Criteria" A: It was extremely easy to peel off. B: It was easy to peel off C: It was difficult to remove

[0062] <<Evaluation of wrinkles that occur when pasting>> When the release sheet was peeled off from the skin-design sheets with cover sheets of Experimental Examples 8 to 13 and the sheets were applied to the skin, wrinkles that occurred in the urethane film were evaluated based on the following evaluation criteria. The results are shown in Table 2.

[0063] "Evaluation Criteria" A: No wrinkles were formed B: Slight wrinkles C: Visible wrinkles

[0064] [Table 2]

[0065] <<Evaluation of visibility of grip part>> The skin-design sheets with cover sheets of Experimental Examples 14 to 17 were visually inspected, and the visibility of the tabs of the cover sheets was evaluated based on the following evaluation criteria. The results are shown in Table 3.

[0066] "Evaluation Criteria" A: The knob was very easy to find. B: The grip was easy to find. C: It was not easy to find the grip.

[0067] [Table 3]

[0068] Although the present disclosure has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0069] 10 Thermal transfer sheet 11 Receptor 12 Yellow dye layer 13 Magenta dye layer 14 Cyan dye layer 15 Protective layer 20 Receiving sheet 21 Peel-off sheet 22 1st adhesive layer 23 Elastic Sheet 30 Cover Sheet 31 Knob 40 Second adhesive layer

Claims

1. a laminate in which a release sheet, a first pressure-sensitive adhesive layer, a stretchable sheet, and a receiving layer having a skin design image formed thereon are laminated in this order; a second pressure-sensitive adhesive layer provided on the receiving layer; a cover sheet provided on the second adhesive layer; A skin design sheet comprising: A part of the edge of the skin design sheet is a tab for starting to peel off the cover sheet, where the second adhesive layer is not attached to the laminate, and the edge on the opposite side to the tab is pointed.

2. The skin design sheet according to claim 1, wherein the angle of intersection between one edge and the other edge sandwiching the tip of the pointed edge portion is 30° or more and 120° or less.

3. The skin design sheet according to claim 2, wherein the intersection angle is a value obtained by dividing 360° by an integer.

4. 4. The skin-design sheet according to claim 1, wherein the area of ​​the tab is 3% or more and 20% or less of the area of ​​the entire cover sheet.

5. The skin design sheet according to claim 1 , wherein the cover sheet has a different color between the tab and an area other than the tab.

6. The skin-design sheet according to claim 1 , further comprising a protective layer provided between the receiving layer and the second adhesive layer.

7. The skin-design sheet according to claim 1 , wherein the second adhesive layer is not provided on the tab portion.

8. preparing an image-receiving sheet in which a release sheet, a first pressure-sensitive adhesive layer, and a stretchable sheet are laminated; transferring a receiving layer onto the stretchable sheet of the image receiving sheet; forming a skin design image on the receiving layer and forming a laminate in which the image-receiving sheet and the receiving layer are laminated; a step of attaching a cover sheet to the receiving layer of the laminate via a second adhesive layer to produce a laminate with a cover sheet; A step of cutting the laminate with the cover sheet to prepare a plurality of skin-design sheets; Equipped with A method for manufacturing a skin design sheet, wherein a portion of each of the plurality of skin design sheets is a tab for starting to peel off the cover sheet, where the second adhesive layer is not attached to the laminate, and the edge portion opposite the tab is pointed.

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