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 freckles. The present invention also relates to a skin seal used when it is desired to add patterns, designs, or marks to human skin.

Background Art

[0002] Conventionally, a skin seal for hiding dark-colored parts of the skin, such as freckles and moles, has been disclosed in Patent Document 1. In this skin seal, the adhesive layer contained in the skin seal is attached to the skin, whereby the skin seal is attached to the surface of the skin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The skin seal disclosed in Patent Document 1 included an adhesive layer, and a separator was adhered to the surface of this adhesive layer. When attaching this skin seal to human skin, first, the separator is peeled off from the adhesive layer, and then the adhesive layer is attached to human skin. Thereby, the entire skin seal is attached to the surface of human skin.

[0005] In this conventional skin seal, the adhesive force of the adhesive layer was uniform over the entire surface of the adhesive layer. That is, the adhesive force of the adhesive layer was set to the same value over the entire surface of the adhesive layer.

[0006] By the way, some people have skin properties that make it difficult to apply skin seals. For example, for people with excessively dry skin, the normal adhesive strength of skin seals may not be sufficient to adhere them to their skin. In such cases, increasing the adhesive strength of the adhesive layer makes it possible to apply skin seals to such people's skin. However, if the adhesive strength is set too high, when a normal person tries to remove a skin seal that is no longer needed, it may tear midway, making it difficult to peel off, or the person may experience severe pain when removing the skin seal.

[0007] This invention has been made in view of the above-mentioned problems with conventional skin seals, and aims to provide a skin seal that can be easily applied to the skin of people who have difficulty applying skin seals, as well as people who can easily apply skin seals, and that can be easily removed. [Means for solving the problem]

[0008] The skin seal according to the present invention is a skin seal applied to human skin, comprising 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 P1 is the force for peeling the separator from the layer in contact with the separator, P2 is the force for peeling the release agent layer from the layer in contact with the base material on the opposite side, and P3 is the force for peeling the adhesive layer from the skin, P1 <P2<P3 And, The adhesive layer has an inner region and an outer region, and the adhesive force of the outer region is stronger than the adhesive force of the inner region. The material is characterized in that an ink layer is provided between the release agent layer and the adhesive layer.

[0009] According to this skin seal, since a strongly adhesive outer region is provided outside the inner region of the adhesive layer, it can be well attached to the skin of those who have difficulty attaching the skin seal and those who can attach the skin seal normally, and moreover, a skin seal that can be well peeled off can be provided.

[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 can firmly attach the skin seal to those who have difficulty attaching the skin seal due to reasons such as extremely dry skin. Moreover, for ordinary people who do not feel difficulty in attaching the skin seal, the attachment strength of the skin seal will 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 can 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 moreover, 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] Still another aspect of the skin seal according to the present invention is characterized in that the thickness of the adhesive layer is made thicker in the outer region and thinner in the inner region in a natural state, so that the adhesive force in the outer region is stronger than the adhesive force in the inner region.

[0017] Still another aspect of the skin seal according to the present invention is characterized in that a mat layer is provided on the base material.

[0018] The skin seal according to the present invention Ru is is characterized in that an ink layer is provided between the release agent layer and the adhesive layer.

[0019] Still another aspect of the skin seal according to the present invention is characterized in that the ink layer is printed with a skin color.

[0020] Still another aspect of the skin seal according to the present invention is characterized in that an image such as letters, pictures, patterns, etc. is printed on the ink layer.

[0021] Still another aspect of the skin seal according to the present invention is characterized in that an image such as letters, pictures, patterns, etc. can be drawn on the release agent layer.

[0022] Still another aspect of the skin seal according to the present invention is characterized in that the outer region surrounds the entire circumference of the inner region in a frame shape.

[0023] Still another aspect of the skin seal according to the present invention is characterized in that the outer region partially surrounds the inner region.

[0024] Still another aspect of the skin seal according to the present invention is characterized in that the base material has light transmittance such that the ink layer can be visually recognized.

Effects of the Invention

[0025] Some people have skin properties that make it difficult to apply skin seals. For example, in people with excessively dry skin, the normal adhesive strength of skin seals may not be sufficient to adhere them to their skin. In such cases, increasing the overall adhesive strength of the adhesive layer would make it possible to apply skin seals to such people's skin. However, if the overall adhesive strength of the adhesive layer is set too high, when a person removes a skin seal that is no longer needed, it may tear midway, making it difficult to peel off, or the person may experience severe pain when removing the skin seal.

[0026] In this invention, since the adhesive layer has a strong adhesive outer region 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 does not become excessively strong for people who can apply skin seals normally. Therefore, for people who can apply skin seals normally, the skin seal can be easily removed without causing strong pain when peeling it off. [Brief explanation of the drawing]

[0027] [Figure 1] This figure shows one 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 2] This figure shows 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 3] This figure shows 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] This figure shows 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 5]This figure shows 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] This figure shows 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] This figure shows 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] This figure shows 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] This figure shows 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] This figure shows 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] This figure shows 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] This figure shows 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. [Modes for carrying out the invention]

[0028] (First embodiment) The skin seal according to the present invention will be described below based on embodiments. It should be noted that the present invention is not limited to these embodiments. Furthermore, in the drawings accompanying this specification, components may be shown in proportions different from those of the actual parts in order to clearly illustrate characteristic parts.

[0029] Figure 1(a) shows a planar structure of one embodiment of the skin seal according to the present invention. Figure 1(b) shows a side view 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 arranged in a laminated state between the base material 2 and the separator 3.

[0030] (Base material) The base material 2 can be formed from a release sheet. Such release sheets include, for example, polyethylene film, polypropylene film, polymethylpentene film, etc., which are themselves release-able. Alternatively, these films, various films such as polyethylene terephthalate film, polyvinyl chloride film, or paper can be coated with a compound that imparts release properties, such as a silicone-based compound or a fluorine-based compound, to form a release sheet.

[0031] It is desirable that the base material 2 has sufficient light transmittance to allow the ink layer 7 to be visually recognized. This is because if the base material 2 is light transmittance in this way, the user can visually see the ink layer 7 and apply it to the desired area of ​​the skin.

[0032] (Matte layer) The matte layer 4 is formed by creating fine irregularities on the surface of the base material 2, thereby roughening 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 creating fine irregularities on the surface using an embossing roll or the like, or by a process that blasts fine particles onto the surface (so-called sandblasting). By providing such a matte layer 4 on the base material 2, it is possible to leave fine irregularities on the surface of the ink layer 7 that remains on the human skin after the base material 2 is peeled off. As a result, it is possible to prevent the skin seal from reflecting light too brightly (so-called glossiness), and the skin seal can be made to blend in with the appearance of 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 from a material on which printing can be applied. If the base material 2 itself is formed from a release sheet, the release properties of the base material 2 can function as the release agent layer.

[0034] (Ink layer) The ink layer 7 is formed on the release agent layer 5 by printing, for example, by screen printing. In this embodiment, the ink layer 7 is formed by solid printing of a skin color. The ink layer 7 may be one layer or multiple layers. If there is one layer, that layer is a skin color ink layer. If there are multiple layers, all layers may be skin color, or at least one layer may be white and the remaining layers may be skin color. If a person has tattoos, scars or other patterns on their skin, by printing the ink layer 7 in a skin color, the patterns can be hidden by applying the skin seal 1A over the patterns on the person's skin.

[0035] (Elastic layer) The elastic layer 6 is formed by printing a transparent resin, for example, by screen printing. The elongation at break of this elastic layer 6 is 50 to 1000%, preferably 250 to 800%. If the elongation at break is less than 50%, the resulting skin seal will not be able to follow the bending and stretching of the skin. Furthermore, from the viewpoint of further improving the ability to follow the bending and stretching of the skin, it is preferable that the elongation at break be 250% or more.

[0036] If the elongation at break exceeds 1000%, the flexibility of the elastic layer 6 causes stickiness, leading to significant adhesion of dirt and other debris. Furthermore, if the elongation at break exceeds 1000%, the elastic layer 6 as a coating weakens, potentially making it difficult to remove from the skin. From the viewpoint of further improving the prevention of dirt adhesion and preventing difficulty in removing from the skin, it is preferable that the elongation at break be 800% or less.

[0037] The 100% modulus of elastic layer 6 is 5-150 kg / cm². 2 Preferably 15-80 kg / cm³ 2 The 100% modulus is an indicator of elasticity. A 100% modulus of 5 kg / cm² is an indicator of elasticity. 2 If the modulus is less than 150 kg / cm², the pattern on the sticker attached to the skin will easily become distorted. 2 Beyond a certain point, the pattern on the sticker attached to the skin becomes prone to cracking. Furthermore, the "elasticity" of the "elastic layer" does not mean that it can completely return to its original shape after being stretched; it also includes cases where it shrinks 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 (crack resistance, peelability after use, etc.) is poor, and if it exceeds 50 μm, the coating is too strong and does not conform well to the skin. While the elastic layer 6 is preferably a single layer in terms of composition, it may also have a multi-layer structure.

[0039] The elastic layer 6 mainly consists of resin and rubber components. When the elastic layer 6 contains at least a resin component, a plasticizer is usually added. However, there are cases where a plasticizer is not added even when the elastic layer 6 contains at least a resin component. When the elastic layer 6 contains rubber components, a plasticizer may not be added.

[0040] Examples of the above resin and rubber components include ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl chloride copolymer, ethylene-acrylic acid ester copolymer, ethylene-ethyl acrylate-maleic anhydride copolymer (specific examples include olefin copolymer resins such as "Bondine" (product name) manufactured by Sumitomo Chemical Co., Ltd., ethyl acrylate-butyl acrylate copolymer, butyl acrylate-methyl acrylate copolymer, ethyl acrylate-vinyl acetate copolymer, and other acrylic resins, one-component thermoplastic resins and urethane resins (specific examples include "Rezamin" (product name) manufactured by Dainichi Seika Kogyo Co., Ltd. and "Paraprene" (product name) manufactured by Nippon Polyurethane Industries, Ltd.), various polyamide resins, vinyl acetate resins, and various silicone resins such as ethyl silicone resin and butyl silicone resin (specific examples include "SE" manufactured by Toray Dow Corning Co., Ltd.) Examples of rubbers include 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 various other types of rubber.

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

[0042] Furthermore, components that can be added to the elastic layer 6 include leveling agents, defoaming agents, 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 also be provided between the ink layer 7 and the adhesive layer 8.

[0043] The following effects are obtained by providing the elastic layer 6: The skin seal 1A is easy to apply to the skin. After applying the skin seal 1A to the skin, it can flexibly follow the bending and stretching of the skin. Cracking and crumbling of the ink can be prevented regardless of the bending and stretching of the skin. The ink does not peel off the skin during use. The ink can be easily removed 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. Acrylic, rubber, or silicone adhesives can be used for this adhesive layer 8. Various additives, such as fillers, white pigments, metal powders (including aluminum powder), tackifiers, leveling agents, and defoamers, may be added to the adhesive as needed.

[0045] The adhesive strength of this adhesive layer 8 is set such that the inner region 8a is weaker than the outer region 8b, and the outer region 8b is stronger than the inner region 8a. The outer edge of the inner region 8a is rectangular (i.e., rectangular or square), and the outer edge of the outer region 8b is also rectangular. The outer region 8b is a frame-shaped region that surrounds the inner region 8a.

[0046] In this embodiment, as shown in Figure 1(b), the thickness Ta of the inner region 8a in its natural state is made thinner than the thickness Tb of the outer region 8b in its natural state, i.e. Ta <Tb By setting it this way, the adhesive force of the inner region 8a is weaker than that of the outer region 8b, and the adhesive force of the outer region 8b is stronger than that of the inner region 8a.

[0047] Figure 1(b) depicts the thicknesses Ta and Tb of the adhesive layer 8 in its natural state. Therefore, a space is depicted between the inner region 8a and the separator 3. However, in the actual skin seal 1A product, the entire adhesive layer 8 is pressed, causing the outer region 8b to be crushed, and as a result, the inner region 8a adheres 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 the region with strong adhesive force, becomes too large compared to the area A1 of the inner region 8a, which is the 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 off 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 the region with strong adhesive force, becomes too small compared to the area A1 of the inner region 8a, which is the region with weak adhesive force. As a result, there may be people who feel that the attachment 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 is 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, when Na ≤ 5 (N / 25 mm), the inner region 8a can be attached to the skin of an ordinary person without any problem. However, when Na ≤ 6 (N / 25 mm), it is difficult to attach the skin seal to a person with extremely dry skin or the like. 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 increased is limited to the outer region 8b, for an ordinary person (that is, for a person who does not feel difficulty in attaching the skin seal), the adhesive force will not become excessively strong. Therefore, for an ordinary person, the peeling process of the skin seal will 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 increased and decreasing the thickness of the layer where the adhesive force is to be decreased as described above. Also, for example, there is a method of forming the layer where the adhesive force is to be increased with a material having a strong adhesive force and forming the layer where the adhesive force is to be decreased 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 an ordinary person, and therefore, it is possible to provide a skin seal that is easy to peel off for an ordinary person.

[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 be light transmissive or may not be light transmissive. However, in the present embodiment, since the base material 2 has light transmissibility, in order to enable the user to easily 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, tattoos 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. Thereby, after peeling 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 from the skin seal 1A while leaving the ink layer 7 and the like on the skin. In addition, when discussing P1, P2, and P3, the force related to 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, due to the nature of the skin that a person has, there are people who have difficulty attaching a skin seal. For example, for a person with the property that the skin is too dry, it may not be possible to attach the skin seal 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 is 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, the skin seal may be torn in the middle and become difficult to peel off, or there may be a risk that the person feels 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 attach the skin seal normally. Therefore, for a person who can attach the skin seal normally, the skin seal can be easily peeled off without feeling strong pain when peeling off the skin seal.

[0063] (Second Embodiment) Figure 2 shows a second embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1B, and (b) shows a side view of the skin seal 1B. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0064] In the embodiment shown in Figure 1, the ink layer 7 was formed by solid printing of a skin color. In this embodiment, the letter "A" is printed on the ink layer 7. This allows the letter "A" to be attached to the skin when the skin seal 1B is applied to a person's skin. If any other letter, picture, pattern, or other image is printed on the ink layer 7, the desired image can be attached to the skin when the skin seal 1B is applied to the skin.

[0065] In this embodiment as well, the adhesive strength of the inner region 8a is weakened and the adhesive strength of the outer region 8b is strengthened. As a result, the strong adhesive of the outer region 8b allows the skin seal to be applied well to people whose skin is otherwise difficult to adhere to. Moreover, since the area where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being applied too strongly to normal people, and therefore, a skin seal that is easy to peel off is provided for normal people. can be provided .

[0066] (Third embodiment) Figure 3 shows a third embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1C, and (b) shows a side view of the skin seal 1C. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0067] In the embodiment shown in Figure 1, the ink layer 7 was formed by solid printing of a skin color. In the embodiment shown in Figure 2, the letter "A" was printed on the ink layer 7. In this embodiment, a "+" mark is printed on the ink layer 7. This allows the "+" mark to be attached to the skin when the skin seal 1C is applied to human skin. According to this embodiment, for example, this mark can be attached to the treatment area of ​​a patient that should be irradiated with X-rays during X-ray therapy.

[0068] In this embodiment as well, the adhesive strength of the inner region 8a is weakened and the adhesive strength of the outer region 8b is strengthened. As a result, the strong adhesive of the outer region 8b allows the skin seal to be applied well to people whose skin is otherwise difficult to adhere to. Moreover, since the area where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being applied too strongly to normal people, and therefore, a skin seal that is easy to peel off can be provided to normal people.

[0069] (Fourth embodiment) Figure 4 shows a fourth embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1D, and (b) shows a side view of the skin seal 1D. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0070] This skin seal 1D does not use the matte layer 4 and ink layer 7 used in the embodiment of Figure 1. Skin seals that do not use these layers are also included in the present invention. In this embodiment, after the skin seal 1D is applied to a person's skin, desired images such as letters, patterns, etc. can be printed on the surface of the adhesive layer 8 using a writing instrument such as a magic marker. This makes it possible to draw desired images on a person's skin.

[0071] In this embodiment as well, the adhesive strength of the inner region 8a is weakened and the adhesive strength of the outer region 8b is strengthened. As a result, the strong adhesive of the outer region 8b allows the skin seal to be applied well to people whose skin is otherwise difficult to adhere to. Moreover, since the area where the adhesive strength is strengthened is limited to the outer region, it is possible to prevent the skin seal from being applied too strongly to normal people, and therefore, a skin seal that is easy to peel off can be provided to normal people.

[0072] (Fifth embodiment) Figure 5 shows a fifth embodiment of the skin seal according to the present invention. (a) is a front view of the skin seal 1E, and (b) is a side view of the skin seal 1E. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0073] This skin seal 1E does not use the mat layer 4 used in the embodiment of Figure 1. In this embodiment, the adhesive strength of the adhesive layer 8 changes gradually in steps within the boundary region 9, which 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', which is inside the boundary region 9, is N3, N3 <N2<N1 That is the case.

[0074] To achieve this state of adhesion, when 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 It is set to this. Furthermore, the method for creating a difference in adhesion between the outer region 8b, the boundary region 9, and the inner region 8a' is not limited to the method of creating differences in the thickness of each region in its natural state, as described above; other arbitrary methods can also be employed. For example, it is possible to use a method of forming each region with materials that have different adhesion strengths.

[0075] In this way, by gradually weakening the adhesive force of the inner region 8a compared to the outer region 8b, the adhesion and removal of the skin seal from human skin can be made smoother. This makes it possible to provide a skin seal with a gentle feel to the human body.

[0076] (Sixth embodiment) Figure 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 reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

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

[0078] In this way, by gradually and continuously weakening the adhesive force of the inner region 8a compared to the adhesive force of the outer region 8b, the way the skin seal adheres to and peels off human skin can be made even smoother. This makes it possible to provide a skin seal that feels even gentler on the skin.

[0079] (Seventh Embodiment) Figure 7 shows a seventh embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1G, and (b) shows a side view of the skin seal 1G. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0080] In the embodiment shown in Figure 1, the outer edge of the inner region 8a was rectangular, and the outer edge of the outer region 8b was also rectangular. In contrast, in this 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) Figure 8 shows an eighth embodiment of the skin seal according to the present invention. (a) is a front view of the skin seal 1H, and (b) is a side view of the skin seal 1H. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0082] In the embodiment shown in Figure 7, the outer edge of the inner region 8a was circular, and the outer edge of the outer region 8b was rectangular. In contrast, in this 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) is a front view of the skin seal 1I, and (b) is a side view of the skin seal 1I. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0084] In the embodiment shown in Figure 1, the outer region 8b surrounded a single inner region 8a. In contrast, in this embodiment, the inner region 8a is divided into multiple (four in this embodiment) parts within the outer region 8b.

[0085] (Tenth embodiment) Figure 10 shows a tenth embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1J, and (b) shows a side view of the skin seal 1J. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0086] In the embodiment shown in Figure 1, the outer region 8b surrounded the inner region 8a in a frame-like manner. In contrast, in this embodiment, a pair of linear outer regions 8b, 8b are provided outside the inner region 8a.

[0087] (11th embodiment) Figure 11 shows an eleventh embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1K, and (b) shows a side view of the skin seal 1K. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0088] In the embodiment shown in Figure 10, a highly adhesive outer region 8b existed at the outermost edge of the adhesive layer 8. In contrast, in this embodiment, a less adhesive region 10 exists further outside the highly adhesive outer region 8b. The adhesive strength of region 10 may be equal to that of the inner region 8a, or it may be different from that of the inner region 8a.

[0089] (12th embodiment) Figure 12 shows a twelfth embodiment of the skin seal according to the present invention. (a) shows a front view of the skin seal 1L, and (b) shows a side view of the skin seal 1L. In this embodiment, the same reference numerals are used for the same components as in the embodiment shown in Figure 1, and their descriptions are omitted.

[0090] In the embodiment shown in Figure 1, the entire perimeter of the rectangular inner region 8a is 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 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 as described in the claims.

[0092] For example, in the above embodiment, the outer edges of the inner region 8a and the outer edges of the outer region 8b were set to be rectangular or circular. However, these outer edges can also be set to a specific geometric shape such as an ellipse or an oblong shape, or to an unspecified shape that is not geometrically defined. [Explanation of Symbols]

[0093] 1A~1L: Skin seal, 2: Base material, 3: Separator, 4: Matte layer, 5: Release 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. It is a skin sticker that is applied to human skin. Base material and Separator and, A release agent layer for removing the aforementioned base material, The adhesive layer provided on the separator, An elastic layer provided between the release agent layer and the adhesive layer, It has, Let P1 be the force required to separate the separator from the layer in contact with it. The force P2 is used to separate the release agent layer from the layer in contact with the base material on the opposite side of the release agent layer. When P3 is the force required to peel the adhesive layer from the skin, P1 < P2 < P3 And, The adhesive layer has an inner region and an outer region. The adhesive force of the outer region is stronger than the adhesive force of the inner region. An ink layer is provided between the release agent layer and the adhesive layer. A skin seal characterized by the following features.

2. When the adhesive strength of the inner region is Na (N / 25mm) and the adhesive strength of the outer region is Nb (N / 25mm), 1 ≤ Na ≤ 5 5 < Nb < 9 The skin seal according to claim 1, characterized in that it is the same as described above.

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 A skin seal according to claim 1 or 2, characterized in that it is the same as the one described above.

4. The skin seal according to claim 1, characterized in that the adhesive force changes in steps in the boundary region which is within the inner region and adjacent to the outer region.

5. The skin seal according to claim 1, characterized in that the adhesive force changes steplessly in the boundary region which is within the inner region and adjacent to the outer region.

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

7. The skin seal according to claim 1, characterized in that a mat layer is provided on the base material.

8. The skin seal according to claim 1, characterized in that the ink layer is printed with a skin-colored ink.

9. The skin seal according to claim 1, characterized in that an image such as letters, pictures, or patterns is printed on the ink layer.

10. The skin seal according to claim 1, characterized in that images such as letters, pictures, patterns, etc., can be drawn on the release agent layer.

11. The skin seal according to claim 1, characterized in that the outer region surrounds the entire circumference of the inner region in a frame-like manner.

12. The skin seal according to claim 1, characterized in that the outer region partially surrounds the inner region.

13. The skin seal according to claim 1, characterized in that the base material has light transmittance to such an extent that the ink layer can be visually recognized.

Images