Skin seal

Abstract

To provide a skin seal that can be stuck to the skin appropriately both to a person of a type to whom the skin seal is difficult to be stuck and a person to whom the skin seal can be stuck ordinarily, and can be released appropriately.SOLUTION: A skin seal 1 stuck to the skin of a person includes a base material 2, a separator 3, a release agent layer 5 for releasing the base material 2, an adhesive layer 8 provided on the separator 3, and an elastic layer 6 provided between the release agent layer 5 and the adhesive layer 8. When the force for releasing the separator 3 from a layer in contact with the separator 3 is represented as P1, the force for releasing the release agent layer 5 from a layer in contact with the release agent layer 5 on a side opposite to the base material 2 as P2, and the force for releasing the adhesive layer 8 from the skin as P3, an inequality of P1<P2<P3 is satisfied. The adhesive layer 8 includes an inner region 8a and an outer region 8b, and the viscosity of the outer region 8b is larger than that of the inner region 8a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a skin seal for hiding patterns on human skin, such as tattoos, scars, birthmarks, and age spots. The present invention also relates to a skin seal for use when adding a pattern, design, or mark to human skin. [Background technology]

[0002] Conventionally, a skin seal for hiding dark skin areas such as blemishes and freckles is disclosed in Patent Document 1. In this skin seal, an adhesive layer included in the skin seal is attached to the skin, thereby allowing the skin seal to be attached to the surface of the skin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5805901 Summary of the Invention [Problem to be solved by the invention]

[0004] The skin seal disclosed in Patent Document 1 includes an adhesive layer, and a separator is attached to the surface of the adhesive layer. When attaching the skin seal to a person's skin, the separator is first peeled off from the adhesive layer, and then the adhesive layer is attached to the person's skin. This allows the entire skin seal to be attached to the surface of the person's skin.

[0005] In this conventional skin seal, the adhesive strength of the adhesive layer is uniform over the entire surface of the adhesive layer, i.e., the adhesive strength of the adhesive layer is set to the same value over the entire surface of the adhesive layer.

[0006] However, some people have difficulty applying a skin seal due to the nature of their skin. For example, for people whose skin is too dry, the normal adhesive strength of the skin seal may not be sufficient to apply the skin seal to the skin. For such people, if the adhesive strength of the adhesive layer is increased, the skin seal can be applied to the skin of such people. However, if the adhesive strength is set to be strong, when an ordinary person peels off an unnecessary skin seal from the skin, the skin seal may tear in the middle, making it difficult to peel off, or the person may feel strong pain when peeling off the skin seal.

[0007] To provide a skin seal that can be easily applied to and easily peeled off by both people who have difficulty applying skin seals and people who can normally apply skin seals, the present invention has been made in consideration of the above-mentioned problems with conventional skin seals. [Means for solving the problem]

[0008] The skin seal according to the present invention is a skin seal to be applied to human skin, and comprises a base material, a separator, a release agent layer for peeling off the base material, an adhesive layer provided on the separator, and an elastic layer provided between the release agent layer and the adhesive layer, wherein the force required to peel the separator from a layer in contact with the separator is P1, the force required to peel the release agent layer from a layer in contact with the release agent layer on the opposite side of the base material is P2, and the force required to peel the adhesive layer from the skin is P3. P1 <P2<P3 and The adhesive layer has an inner region and an outer region, and the adhesive strength of the outer region is stronger than the adhesive strength of the inner region.

[0009] According to this skin seal, since an outer region with a strong adhesive force is provided outside the inner region of the adhesive layer, it is possible to provide a skin seal that can be satisfactorily attached to the skin of those who have difficulty attaching the skin seal and also to those who can attach the skin seal normally, and can be satisfactorily peeled off.

[0010] Another aspect of the invention of the skin seal according to the present invention is characterized in that when the adhesive force of the inner region is Na (N / 25 mm) and the adhesive force of the outer region is Nb (N / 25 mm), 1 ≦ Na ≦ 5 and 5 < Nb < 9.

[0011] According to this skin seal, it is possible to firmly attach the skin seal to those who have difficulty attaching the skin seal due to reasons such as severe skin dryness. Moreover, for ordinary people who do not feel difficulty in attaching the skin seal, the attachment strength of the skin seal does not become too strong.

[0012] Still another aspect of the invention of the skin seal according to the present invention is that when the area of the inner region is A1 and the area of the outer region is A2, 2.4 × A2 ≦ A1 ≦ 3.4 × A2 It is characterized by being so.

[0013] According to this skin seal, it is possible to reduce the feeling that the adhesive force of the skin seal is too strong, reduce the feeling of pain when peeling the skin seal from the skin, and prevent the skin seal from lifting off the skin.

[0014] Still another aspect of the invention of the skin seal according to the present invention is characterized in that the adhesive force changes stepwise in a boundary region that is within the inner region and adjacent to the outer region.

[0015] Still another aspect of the invention of the skin seal according to the present invention is characterized in that the adhesive force changes continuously in a boundary region that is within the inner region and adjacent to the outer region.

[0016] Yet another aspect of the skin seal of the present invention is characterized in that the thickness of the adhesive layer is thicker in the outer region and thinner in the inner region in its natural state, thereby making the adhesive strength of the outer region stronger than the adhesive strength of the inner region.

[0017] In still another aspect of the skin seal according to the present invention, a matte layer is provided on the base material.

[0018] In still another aspect of the skin seal according to the present invention, an ink layer is provided between the release agent layer and the adhesive layer.

[0019] In still another aspect of the skin seal according to the present invention, the ink layer is printed in a flesh color.

[0020] In still another aspect of the skin sticker according to the present invention, images such as letters, pictures, patterns, etc. are printed on the ink layer.

[0021] In still another aspect of the skin seal according to the present invention, the release agent layer can be provided with images such as letters, pictures, patterns, etc.

[0022] In still another aspect of the skin seal according to the present invention, the outer region surrounds the entire periphery of the inner region in a frame shape.

[0023] In yet another aspect of the skin seal according to the present invention, the outer region partially surrounds the inner region.

[0024] In still another aspect of the skin seal according to the present invention, the base material is characterized in that it has a degree of light transparency that allows the ink layer to be visually recognized. Effect of the Invention

[0025] Some people have difficulty applying a skin seal due to the nature of their skin. For example, for people whose skin is too dry, the normal adhesive strength of the skin seal may not be sufficient to apply the skin seal to the skin. For such people, if the overall adhesive strength of the adhesive layer is increased, the skin seal can be applied to the skin of such people. However, if the overall adhesive strength of the adhesive layer is set to be strong, when an ordinary person peels off an unnecessary skin seal from the skin, the skin seal may tear in the middle, making it difficult to peel off, or the person may feel strong pain when peeling off the skin seal.

[0026] In the present invention, since the adhesive layer is provided with an outer region with strong adhesive strength outside the inner region, the skin seal can be applied well even to people who have difficulty applying skin seals. Moreover, since the adhesive strength of the inner region is weaker than that of the outer region, the adhesive strength is not excessively strong for ordinary people who can normally apply the skin seal. Therefore, for people who can normally apply the skin seal, the skin seal can be easily peeled off without feeling strong pain when peeling it off. [Brief description of the drawings]

[0027] [Figure 1] 1A and 1B are diagrams showing one embodiment of a skin seal according to the present invention, in which (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Diagram 2] 1A and 1B are views showing another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Diagram 3] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 4] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Diagram 5]11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 6] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 7] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 8] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 9] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 10] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 11] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. [Figure 12] 11A and 11B are diagrams showing yet another embodiment of the skin seal according to the present invention, where (a) is a plan view of the skin seal, and (b) is a side view of the skin seal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] (First embodiment) Hereinafter, the skin seal according to the present invention will be described based on an embodiment. However, the present invention is not limited to this embodiment. In addition, in the drawings attached to this specification, components may be shown at different ratios from the actual ones in order to easily show characteristic parts.

[0029] Fig. 1(a) shows the planar structure of one embodiment of a skin seal according to the present invention. Fig. 1(b) shows the side structure of the skin seal. The skin seal 1A shown here has a base material 2 and a separator 3. A matte layer 4 is formed on the surface of the base material 2. A release agent layer 5 is provided on the matte layer 4 by printing, coating, or the like. An elastic layer 6, an ink layer 7, and an adhesive layer 8 are provided between the base material 2 and the separator 3 in a layered state.

[0030] (Base material) The base material 2 can be formed of a release sheet. Such a release sheet is, for example, a polyethylene film, a polypropylene film, a polymethylpentene film, etc., which have release properties by themselves. In addition, the release sheet can be made by coating these films, various films such as a polyethylene terephthalate film, a polyvinyl chloride film, etc., or paper with a compound that imparts release properties, such as a silicone-based compound or a fluorine-based compound.

[0031] It is desirable that the base material 2 has a degree of light transparency that allows visual recognition of the ink layer 7. By making the base material 2 light-transmitting in this manner, the user can attach the ink layer 7 to a desired location on the skin while visually recognizing the ink layer 7.

[0032] (Matte layer) The matte layer 4 is formed by forming minute irregularities on the surface of the base material 2 to roughen the surface. Such roughening can be achieved, for example, by applying a resin containing minute fillers to the surface of the base material 2, by forming minute irregularities on the surface with an embossing roll or the like, or by a process of blasting minute particles (so-called sandblasting). By providing such a matte layer 4 on the base material 2, minute irregularities can be left on the surface of the ink layer 7 that remains on the human skin after the base material 2 is peeled off, and as a result, the skin seal can be prevented from clearly reflecting light (so-called shininess) and can be made to blend in appearance with the human skin.

[0033] (Release agent layer) The release agent layer 5 can be formed by applying any known release agent. The release agent layer 5 is formed of a material on which printing can be performed. When the base material 2 itself is formed of a release sheet, the release property of the base material 2 can function as the release agent layer.

[0034] (Ink layer) The ink layer 7 is formed by printing on the release agent layer 5, for example, by screen printing. In this embodiment, the ink layer 7 is formed by solid printing in flesh color. The ink layer 7 may be one layer or multiple layers. In the case of one layer, the layer is a flesh-colored ink layer. In the case of multiple layers, all layers may be flesh colored, or at least one layer may be white and the remaining layers may be flesh colored. If a person has tattoos, scars, or other patterns on their skin, the ink layer 7 is printed in flesh color, and the skin sticker 1A can be applied over the pattern on the person's skin to hide the pattern.

[0035] (Elastic layer) The elastic layer 6 is formed by printing, for example, screen printing, a transparent resin. The breaking elongation of this elastic layer 6 is 50 to 1000%, preferably 250 to 800%. If the breaking elongation is less than 50%, the obtained skin seal cannot follow the bending and stretching of the skin. From the viewpoint of further improving the ability to follow the bending and stretching of the skin, the breaking elongation is preferably 250% or more.

[0036] If the breaking elongation exceeds 1000%, the flexibility of the elastic layer 6 will cause stickiness, resulting in significant adhesion of dirt and the like. If the breaking elongation exceeds 1000%, the elastic layer 6 as a coating will be weakened, and there is a risk that it will be difficult to peel off from the skin. From the viewpoint of further enhancing prevention of adhesion of dirt and the like and prevention of difficulty in peeling off from the skin, the breaking elongation is preferably 800% or less.

[0037] The 100% modulus of the elastic layer 6 is 5 to 150 kg / cm 2 , preferably 15 to 80 kg / cm 2 The 100% modulus is an index of elasticity. 2 If the modulus is less than 150 kg / cm, the pattern on the sticker attached to the skin will easily fall apart. 2 If the temperature exceeds this range, the pattern of the sticker applied to the skin will be prone to cracking. Note that the "elasticity" of the "elastic layer" does not mean that it can be completely restored after being stretched, but also includes the case where it can be shrunk to a considerable extent.

[0038] The thickness of the elastic layer 6 is 3 to 50 μm, preferably 8 to 25 μm. If the thickness is less than 3 μm, the film-forming ability (cracking, peeling after use, etc.) is poor, and if it exceeds 50 μm, the coating is too tough and the conformability to the skin is poor. The elastic layer 6 is preferably a single layer in terms of composition, but may have a multi-layer structure.

[0039] The elastic layer 6 is mainly composed of a resin or rubber component. When the elastic layer 6 is at least composed of a resin component, a plasticizer is usually added. However, when the elastic layer 6 is at least composed of a resin component, a plasticizer may not be added. When the elastic layer 6 is composed of a rubber component, a plasticizer may not be added.

[0040] Examples of the resin / rubber component include ethylene-vinyl acetate copolymers, ethylene-vinyl alcohol copolymers, ethylene-vinyl chloride copolymers, ethylene-acrylic acid ester copolymers, ethylene-ethyl acrylate-maleic anhydride copolymers (specific examples include olefin copolymer resins such as "Bondyne (trade name)" manufactured by Sumitomo Chemical Co., Ltd.), acrylic resins such as ethyl acrylate-butyl acrylate copolymers, butyl acrylate-methyl acrylate copolymers, and ethyl acrylate-vinyl acetate copolymers, one-component thermoplastic resin-family urethane resins (specific examples include "Rezamin (trade name)" manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd. and "Paraprene (trade name)" manufactured by Nippon Polyurethane Industry Co., Ltd.), various polyamide resins, vinyl acetate resins, and various silicone resins such as ethyl silicone resins and butyl silicone resins (specific examples include "SE (trade name)" manufactured by Toray Dow Corning Co., Ltd.), 5004 (product name)), natural rubber, SBR, chloroprene rubber, acrylic rubber, NBR, butyl rubber, isoprene rubber, urethane rubber, ethylene-vinyl acetate copolymer rubber, silicone rubber, and the like.

[0041] Examples of the above plasticizers include DOP, DBP, butyl adipate, ethyl phthalate, liquid silicone, etc. Needless to say, which plasticizer to use depends on the type of resin or rubber component.

[0042] Further, examples of components that can be added to the elastic layer 6 include a leveling agent, an antifoaming agent, and various other additives. In this embodiment, the elastic layer 6 is provided between the base material 2 and the ink layer 7, but the elastic layer 6 may be provided between the ink layer 7 and the adhesive layer 8.

[0043] The provision of elastic layer 6 provides the following effects: Skin seal 1A can be easily attached to the skin. After skin seal 1A is attached to the skin, it can be made to flexibly follow the bending and stretching of the skin. Ink cracking and crumbling can be prevented regardless of the bending and stretching of the skin. The ink will not peel off from the skin during use. The ink can be easily peeled off from the skin after use.

[0044] (Adhesive layer) An adhesive layer 8 is formed on the elastic layer 6 by a printing method such as screen printing. An acrylic, rubber, silicone, or other adhesive can be used for this adhesive layer 8. If necessary, various additives such as a filler, a white pigment, a metal powder such as aluminum powder, a tackifier, a leveling agent, an antifoaming agent, and the like may be added to the adhesive.

[0045] The adhesive strength of the adhesive layer 8 is set to be weaker in the inner region 8a than in the outer region 8b, and stronger in the outer region 8b than in the inner region 8a. The outer edge of the inner region 8a is rectangular (i.e., oblong or square), and the outer edge of the outer region 8b is also rectangular. The outer region 8b is a frame-shaped region surrounding the inner region 8a.

[0046] In this embodiment, as shown in FIG. 1(b), the thickness Ta of the inner region 8a in the natural state is smaller than the thickness Tb of the outer region 8b in the natural state. Ta <Tb By setting the adhesive strength of the inner region 8a to be weaker than that of the outer region 8b, the adhesive strength of the outer region 8b is realized to be stronger than that of the inner region 8a.

[0047] 1(b), the thicknesses Ta and Tb of the adhesive layer 8 are depicted in their natural state. Therefore, a space is depicted between the inner region 8a and the separator 3. However, in the skin seal 1A as an actual product, the entire adhesive layer 8 is pressed, crushing the outer region 8b, and as a result, the inner region 8a adheres to, i.e., is bonded to, the surface of the separator 3.

[0048] In FIG. 1(a), when the area of the rectangular inner region 8a is A1 and the area of the frame-shaped outer region 8b is A2, 2.4 × A2 ≤ A1 ≤ 3.4 × A2 That is, the area A1 of the rectangular inner region 8a is an arbitrary value selected within the range of 2.4 times to 3.4 times the area A2 of the frame-shaped outer region 8b. This is set for the following reasons.

[0049] According to the verification by the present inventor, when the area A1 of the inner region 8a is smaller than 2.4 times the area A2 of the outer region 8b, the area A2 of the outer region 8b, which is a region with strong adhesive force, becomes too large compared to the area A1 of the inner region 8a, which is a region with weak adhesive force. As a result, there may be people who feel that the adhesive force of the skin seal 1A on the human skin is too strong, or there may be people who feel pain when peeling the skin seal 1A from the human skin.

[0050] Also, when the area A1 of the inner region 8a is larger than 3.4 times the area A2 of the outer region 8b, the area A2 of the outer region 8b, which is a region with strong adhesive force, becomes too small compared to the area A1 of the inner region 8a, which is a region with weak adhesive force. As a result, there may be people who feel that the adhesion of the skin seal 1A is insufficient, or there may be people who find that the skin seal 1A floats up from the skin.

[0051] Specifically, the adhesive force Na of the inner region 8a of the adhesive layer 8 is such that the value measured according to JIS-Z0237 is 1 ≤ Na (N / 25 mm) ≤ 5. Also, the adhesive force Nb of the outer region 8b of the adhesive layer 8 is 5 < Nb (N / 25 mm) < 9. In the case of a conventional skin seal in which the adhesive force of the adhesive layer was uniform over the entire surface, the adhesive force of the adhesive layer was about 1.5 to 6 (N / 25 mm).

[0052] According to the verification by the inventor of the present invention, if Na ≤ 5 (N / 25 mm), the inner region 8a can be attached to the skin of an ordinary person without any problem. However, if Na ≤ 6 (N / 25 mm), it is difficult to attach the skin seal to a person with extremely dry skin or for other reasons. However, in the present embodiment, since the outer region 8b with an adhesive force of 5 < Nb < 9 (N / 25 mm) is provided outside the inner region 8a, due to the function of this outer region 8b, it has become possible to attach the skin seal well even to a person to whom it is difficult to attach the skin seal.

[0053] Moreover, since the region where the adhesive force is strengthened is limited to the outer region 8b, for ordinary people (that is, for those who do not feel difficulty in attaching the skin seal), the adhesive force does not become excessively strong. Therefore, for ordinary people, the peeling process of the skin seal does not become difficult.

[0054] The method for making the adhesive force of the inner region 8a weaker than that of the outer region 8b is not limited to a specific method. As such a method, for example, there is a method of increasing the thickness of the layer where the adhesive force is to be strengthened and decreasing the thickness of the layer where the adhesive force is to be weakened as described above. Also, for example, there is a method of forming the layer where the adhesive force is to be strengthened with a material having a strong adhesive force and forming the layer where the adhesive force is to be weakened with a material having a weak adhesive force.

[0055] In the present embodiment, since the adhesive force of the inner region 8a is weakened and the adhesive force of the outer region 8b is strengthened, due to the function of the outer region 8b with a strong adhesive force, it is possible to attach the skin seal well to a person to whom it is difficult to attach the skin seal due to the nature of the skin. Moreover, since the region where the adhesive force is strengthened is limited to the outer region, it is possible to prevent the skin seal from being attached too strongly to ordinary people. Therefore, it is possible to provide a skin seal that is easy to peel off for ordinary people.

[0056] (Separator) In FIG. 1, the separator 3 is formed of the same material and has the same shape as the base material 2. It has been described above that it is desirable for the base material 2 to have light transmissibility. The separator 3 may or may not be light transmissive. However, in the present embodiment, since the base material 2 is made light transmissive, in order to easily let the user distinguish between the front and back of the skin seal 1A, it is desirable for the separator 3 to be non-light transmissive, preferably white translucent or white opaque.

[0057] (Method of using the skin seal) When using the skin seal 1A of the present embodiment, first, in FIG. 1(b), the separator 3 is peeled off from the adhesive layer 8. Next, the skin seal 1A from which the separator 3 has been peeled is attached to the portion of the human skin where a tattoo or the like is drawn, on the side of the adhesive layer 8. At this time, since the user can recognize the positional relationship between the tattoo or the like and the ink layer 7 through the light transmissive base material 2, the operation is easy.

[0058] After the skin seal 1A is attached to the skin, the user peels off the base material 2 from the elastic layer 6 at the release agent layer 5. As a result, the ink layer 7 and the elastic layer 6 are attached to the human skin by the adhesive layer 8. In this state, the tattoo or the like on the skin can be concealed by the skin color of the ink layer 7.

[0059] (Release balance) In the skin seal 1A of the present embodiment, when the force for peeling the separator 3 from the adhesive layer 8 (that is, the layer in contact with the separator 3) is P1, and the force for peeling the release agent layer 5 from the elastic layer 6 (that is, the layer in contact with the release agent layer 5 on the opposite side of the base material 2) is P2, P1 < P2. Thereby, only the separator 3 can be peeled off from the skin seal 1A.

[0060] Also, when the force for peeling the release agent layer 5 from the elastic layer 6 is P2 as described above, and the force for peeling the adhesive layer 8 from the skin is P3, P2 < P3. Thus, after peeling off the separator 3 and attaching the skin seal 1A to the skin on the surface of the adhesive layer 8, the base material 2 alone can be peeled off from the skin seal 1A while leaving the ink layer 7 etc. on the skin. In addition, when discussing P1, P2, and P3, the force regarding the adhesive layer 8 is considered to be the combined force of the adhesive force of the inner region 8a and the adhesive force of the outer region 8b.

[0061] By the way, among people, there are those who have difficulty attaching a skin seal due to the nature of the skin they possess. For example, for a person with the property that their skin is too dry, there may be cases where the skin seal cannot be attached to the skin with the normal adhesive force that the skin seal has. For such a person, if the overall adhesive force of the adhesive layer is increased, it becomes possible to attach the skin seal to the skin of such a person. However, if the overall adhesive force of the adhesive layer is set too strong, when peeling off the skin seal that is no longer needed by an ordinary person from the skin, there is a risk that the skin seal may tear in the middle and become difficult to peel off, or that the person may feel strong pain when peeling off the skin seal.

[0062] In this embodiment, since the outer region 8b with a strong adhesive force is provided outside the inner region 8a, it is possible to attach the skin seal well even to a person who has difficulty attaching the skin seal. Moreover, since the adhesive force of the inner region 8a is weaker than the adhesive force of the outer region, the adhesive force does not become excessively strong for an ordinary person who can normally attach the skin seal. Therefore, for a person who can normally attach the skin seal, the skin seal can be easily peeled off without causing strong pain when peeling off the skin seal.

[0063] (Second Embodiment) 2 shows a second embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1B, and (b) shows a side view of skin seal 1B. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0064] In the embodiment shown in FIG. 1, the ink layer 7 is formed by solid printing in flesh color. In this embodiment, the letter "A" is printed on the ink layer 7. This allows the letter "A" to be attached to the human skin when the skin sticker 1B is applied to the human skin. If an image such as any letter other than "A", a picture, a pattern, etc. is printed on the ink layer 7, the desired image can be attached to the skin by applying the skin sticker 1B to the human skin.

[0065] In this embodiment, the adhesive strength of the inner region 8a is weakened and that of the outer region 8b is strengthened, so that the outer region 8b, which has a stronger adhesive strength, can be used to successfully attach the skin seal to people whose skin has a hard time being attached with skin seals due to its nature. Moreover, since the region where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being attached too strongly to normal people, and therefore it is possible to provide a skin seal that is easy for normal people to remove.

[0066] (Third embodiment) 3 shows a third embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1C, and (b) shows a side view of skin seal 1C. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0067] In the embodiment shown in FIG. 1, the ink layer 7 is formed by solid printing in flesh color. Also, in the embodiment shown in FIG. 2, the letter "A" is printed on the ink layer 7. In this embodiment, a "+" mark is printed on the ink layer 7. This makes it possible to attach the "+" mark to the skin when the skin sticker 1C is attached to human skin. According to this embodiment, for example, this mark can be attached to the treatment site of a patient to be irradiated with X-rays during X-ray therapy.

[0068] In this embodiment, the adhesive strength of the inner region 8a is weakened and that of the outer region 8b is strengthened, so that the outer region 8b, which has a stronger adhesive strength, can be used to successfully attach the skin seal to people whose skin has a hard time being attached with skin seals due to its nature. Moreover, since the region where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being attached too strongly to normal people, and therefore it is possible to provide a skin seal that is easy for normal people to remove.

[0069] (Fourth embodiment) 4 shows a fourth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1D, and (b) shows a side view of skin seal 1D. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0070] This skin sticker 1D does not use the matte layer 4 and ink layer 7 used in the embodiment of Fig. 1. Skin stickers that do not use these layers are also included in the present invention. In this embodiment, after the skin sticker 1D is applied to human skin, a desired image such as letters, a picture, etc. can be printed on the surface of the adhesive layer 8 using a writing instrument such as a magic marker. This allows a desired image to be drawn on the human skin.

[0071] In this embodiment, the adhesive strength of the inner region 8a is weakened and that of the outer region 8b is strengthened, so that the outer region 8b, which has a stronger adhesive strength, can be used to successfully attach the skin seal to people whose skin has a hard time being attached with skin seals due to its nature. Moreover, since the region where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being attached too strongly to normal people, and therefore it is possible to provide a skin seal that is easy for normal people to remove.

[0072] Fifth embodiment 5 shows a fifth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1E, and (b) shows a side view of skin seal 1E. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0073] This skin seal 1E does not use the mat layer 4 used in the embodiment of FIG. 1. In this embodiment, the adhesive strength of the adhesive layer 8 gradually changes in a stepwise manner in a boundary region 9 that is within the inner region 8a and adjacent to the outer region 8b. That is, if the adhesive strength of the outer region 8b of the adhesive layer 8 is N1, the adhesive strength of the adjacent boundary region 9 is N2, and the adhesive strength of the inner region 8a' that is a region more inside the boundary region 9 is N3, then N3 <N2<N1 It is.

[0074] In order to realize such an adhesive force state, the thickness of the outer region 8b of the adhesive layer 8 in its natural state is T1, the thickness of the adjacent boundary region 9 in its natural state is T2, and the thickness of the inner region 8a' in its natural state is T3. T3 <T2<T1 is set to. The method for generating a difference in adhesive strength between the outer region 8b, the boundary region 9, and the inner region 8a' can be any method other than the above-mentioned method of providing a difference in thickness of each region in the natural state. For example, it is also possible to use a method of forming each region with a material having a different adhesive strength.

[0075] In this way, by gradually weakening the adhesive strength of the inner region 8a from that of the outer region 8b in a stepwise manner, the skin seal can be smoothly attached to and removed from human skin, thereby providing a skin seal that feels gentle to the touch.

[0076] Sixth embodiment 6 shows a sixth embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1F, and (b) shows a side view of the skin seal 1F. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0077] This skin seal 1F does not use the mat layer 4 used in the embodiment of Fig. 1. In this embodiment, the adhesive strength of the adhesive layer 8 changes gradually and smoothly in a stepless manner in a boundary region 9 that is within the inner region 8a and adjacent to the outer region 8b. To achieve this state of adhesive strength, the thickness changes at a constant gradient in the boundary region 9 between the outer region 8b of the adhesive layer 8 (thickness T1 in the natural state) and the inner region 8a' of the adhesive layer 8 (thickness T3 in the natural state).

[0078] In this way, by gradually weakening the adhesive strength of the inner region 8a from that of the outer region 8b in a stepless manner, the skin seal can be made to adhere to and peel off from human skin more smoothly, thereby providing a skin seal that feels even gentler to the touch.

[0079] Seventh embodiment 7 shows a seventh embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1G, and (b) shows a side view of skin seal 1G. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0080] 1, the outer edge of the inner region 8a is rectangular, and the outer edge of the outer region 8b is also rectangular. In contrast, in the present embodiment, the outer edge of the inner region 8a is circular, and the outer edge of the outer region 8b is rectangular.

[0081] Eighth embodiment 8 shows an eighth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1H, and (b) shows a side view of skin seal 1H. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0082] 7, the outer edge of the inner region 8a is circular, and the outer edge of the outer region 8b is rectangular. In contrast, in the present embodiment, the outer edge of the inner region 8a is circular, and the outer edge of the outer region 8b is also circular.

[0083] Ninth embodiment Figure 9 shows a ninth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1I, and (b) shows a side view of skin seal 1I. In this embodiment, the same members as those in the embodiment shown in Figure 1 are designated by the same reference numerals, and description of those members will be omitted.

[0084] 1, the outer region 8b surrounds one inner region 8a. In contrast, in this embodiment, the inner region 8a is divided into a plurality of regions (four regions in this embodiment) within the outer region 8b.

[0085] (Tenth embodiment) 10 shows a tenth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1J, and (b) shows a side view of skin seal 1J. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0086] 1, the outer region 8b surrounds the inner region 8a in a frame shape, whereas in this embodiment, a pair of linear outer regions 8b, 8b are provided outside the inner region 8a.

[0087] (Eleventh embodiment) 11 shows an eleventh embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1K, and (b) shows a side view of skin seal 1K. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0088] 10, an outer region 8b having strong adhesive strength is present at the outermost side of the adhesive layer 8. In contrast, in the present embodiment, an area 10 having weak adhesive strength is present further outside the outer region 8b having strong adhesive strength. The adhesive strength of area 10 may be equal to or different from the adhesive strength of the inner region 8a.

[0089] (Twelfth embodiment) 12 shows a twelfth embodiment of the skin seal according to the present invention. (a) shows a front view of skin seal 1L, and (b) shows a side view of skin seal 1L. In this embodiment, the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description of those members will be omitted.

[0090] 1, the rectangular inner region 8a is entirely surrounded by the frame-shaped outer region 8b. In contrast, in this embodiment, the outer region 8b partially surrounds the four corners of the inner region 8a. That is, there are some areas outside the inner region 8a where the outer region 8b is partially absent.

[0091] (Other embodiments) Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments and can be modified in various ways within the scope of the invention described in the claims.

[0092] For example, in the above embodiment, the outer edge of the inner region 8a and the outer edge of the outer region 8b are set to be rectangular or circular. However, these outer edge lines may be set to a specific geometric shape such as an ellipse or an oval, or may be set to an unspecified shape that is not geometrically determined. [Explanation of symbols]

[0093] 1A-1L: skin seal, 2: base material, 3: separator, 4: matte layer, 5: release agent layer, 6: elastic layer, 7: ink layer, 8: adhesive layer, 8a: inner region, 8b: outer region, 9: boundary region, 10: region with weak adhesive strength, Na, Nb: adhesive strength, Ta.Tb: thickness, T1, T2, T3: thickness

Claims

1. A skin sticker to be applied to human skin, A base material, A separator; a release agent layer for peeling off the base material; a pressure-sensitive adhesive layer provided on the separator; an elastic layer provided between the release agent layer and the pressure-sensitive adhesive layer; It has The force required to peel the separator from the layer in contact with the separator is P1, The force required to peel the release agent layer from the layer in contact with the release agent layer on the opposite side of the base material is P2; When the force required to peel the adhesive layer from the skin is P3, P1<P2<P3 and The adhesive layer has an inner region and an outer region, The adhesive strength of the outer region is stronger than the adhesive strength of the inner region. A skin seal characterized by:

2. When the adhesive strength of the inner region is Na (N / 25 mm) and the adhesive strength of the outer region is Nb (N / 25 mm), 1≦Na≦5 5<Nb<9 2. The skin seal according to claim 1,

3. When the area of ​​the inner region is A1 and the area of ​​the outer region is A2, 2.4×A2≦A1≦3.4×A2 3. The skin seal according to claim 1 or 2, characterized in that:

4. 2. The skin seal of claim 1, wherein the adhesive strength changes stepwise in a boundary region, which is a region within the inner region adjacent to the outer region.

5. 2. The skin seal of claim 1, wherein the adhesive strength changes continuously in a boundary region, which is a region within the inner region adjacent to the outer region.

6. The skin seal according to claim 1, characterized in that the thickness of the adhesive layer is thicker in the outer region and thinner in the inner region in its natural state, thereby making the adhesive strength of the outer region stronger than that of the inner region.

7. 2. The skin seal of claim 1, further comprising a matte layer on the base material.

8. 2. The skin seal according to claim 1, further comprising an ink layer between the release agent layer and the adhesive layer.

9. 2. The skin seal according to claim 1, wherein said ink layer is printed in a flesh color.

10. 2. The skin seal according to claim 1, wherein said ink layer is printed with an image such as a letter, a picture, a pattern, or the like.

11. 2. The skin seal according to claim 1, wherein the release agent layer can be provided with images such as letters, pictures, patterns, etc.

12. 2. The skin seal of claim 1, wherein said outer region surrounds said inner region in a frame-like shape.

13. The skin seal of claim 1 , wherein said outer region partially surrounds said inner region.

14. 9. The skin seal according to claim 8, wherein said base material has a degree of light transparency that allows said ink layer to be visually recognized.

Images