Sticking material set and method for using the same

Abstract

To provide a cosmetic sticking material set that can be stuck readily and simply and is highly convenient.SOLUTION: A sticking material set includes: a first holding material 20 that is a sheet-like substrate; and one or more sheet-like sticking materials 10 attached and held on the first holding material and used by being attached to a human skin. Part of the sticking material projects from the first holding material and forms a grip part 15. A second holding material 22 that is a substrate is attached to a surface on a side of the first holding material of the grip part. The second holding material is configured to be separable from the first holding material.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an adhesive patch set and a method for using the same. [Background technology]

[0002] 2. Description of the Related Art In the field of beauty treatments, including makeup and rehabilitation from injuries, there is known a method of concealing scars, blemishes, and the like on the skin and smoothing out wrinkles by applying an adhesive material to the skin.

[0003] For example, Patent Document 1 discloses a technology for a makeup-assisting patch that is extremely thin, conforms well to wrinkles and fine grooves in the skin, follows the movement of the skin well, and is moisture permeable, and does not cause discomfort or rash when applied. This makeup-assisting patch has a protective function against cosmetics and ultraviolet rays, and has a texture similar to that of surrounding healthy skin, so that cosmetics can be applied onto the applied patch. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4672799 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional cosmetic-assistance patch, the user cuts a large sheet-shaped patch into a size that is easy to use according to the purpose and use of application, which causes a problem in terms of convenience. In particular, since the patch is very thin, a certain degree of skill is required to apply the sheet-shaped patch without wrinkling when cutting the sheet-shaped patch or peeling the cut patch from the base material and applying it. Therefore, while developing and using cosmetic patches, the present inventor found a need for a cosmetic patch that can be applied more simply and conveniently and is highly convenient.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide a cosmetic patch set that can be applied simply and easily and is highly convenient. [Means for solving the problem]

[0007] An adhesive material set according to one embodiment of the present invention comprises a first retaining material which serves as a sheet-like base material, and one or more sheet-like adhesive materials which are affixed to and held on the first retaining material and are used by being attached to human skin, a part of the adhesive material protruding from the first retaining material to form a gripping portion, and a second retaining material which serves as a base material is affixed to the surface of the gripping portion facing the first retaining material, and the second retaining material is configured to be separable from the first retaining material.

[0008] In this patch set, the second retaining material is provided in the gripping part, so when the patch is first applied to the application location, it is easy to apply the patch while pulling it, for example, by lifting up the application location. In addition, because the second retaining material is provided in the gripping part, the patch can be applied without directly touching the application surface (adhesive surface) of the gripping part, so that it is possible to prevent a decrease in adhesive strength caused by touching the application surface with the hand during application.

[0009] In the above embodiment, the corners of the patch are preferably chamfered. This embodiment makes it possible to achieve both resistance to peeling during use (sustainability) and ease of handling during application (convenience) at the same time.

[0010] In the above aspect, the patch preferably has a generally tapered portion that is continuously thickened from the grip portion toward the first retaining material in a plan view. According to this aspect, unintentional detachment of the patch from the first retaining material is suppressed, and the convenience of the patch is further improved.

[0011] In the above embodiment, a plurality of patches may be attached and held on the first holding material, and in this case, it is preferable that adjacent patches are arranged so as not to come into contact with each other. According to this embodiment, since a plurality of patches are provided, the number of patches to be used can be selected, and only the necessary number of patches can be used. Furthermore, each patch can be peeled off from the first holding material more easily.

[0012] In the above embodiment, the gripping portion preferably has a shape and area that is completely covered by the user's fingers when the user grips it. According to this embodiment, when the patch is applied while being pulled, the gripping portion is uniformly stretched or deformed, so that the occurrence of wrinkles due to non-uniform stretching or deformation of the patch is suppressed. In this embodiment, the area of ​​the gripping portion may be, for example, 30% or less of the area of ​​the entire patch.

[0013] In the above embodiment, the patch may include, in order from the first holding material side, an adhesive layer, a base layer, and a protective layer. In this embodiment, the base layer contains a polyurethane elastomer having a glass transition temperature of 0°C or less, the adhesive layer contains an acrylic adhesive made of a copolymer containing at least one monomer unit selected from the group consisting of an acrylic acid alkyl ester and a methacrylic acid alkyl ester having an alkyl group having 8 to 12 carbon atoms at a ratio of 70% by weight or more, and it is preferable that the thickness of the base layer is 1.0 μm to 20 μm, the thickness of the adhesive layer is 1.0 μm to 20 μm, and the total thickness of both layers is 2.0 μm to 30 μm. According to this embodiment, it is possible to provide a patch that fits fine unevenness (fine grooves) of the skin, does not stand out at the application site, can easily follow the movement of the skin, is unlikely to cause rash, can protect the skin from cosmetics and ultraviolet rays, and can apply cosmetics in the applied state.

[0014] In the above aspect, it is preferable that the polyurethane elastomer is a polyether-based polyurethane elastomer, and the alkyl acrylate is at least one selected from the group consisting of 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, and isononyl acrylate.

[0015] A method of using an adhesive material set according to one embodiment of the present invention includes: grasping the gripping portion of the adhesive material and peeling the adhesive material from the first holding material; attaching at least a portion of the attachment surface of the adhesive material to an object to be attached; peeling the second holding material from the attached adhesive material; and attaching the attachment surface of the gripping portion exposed by peeling off the second holding material to the object to be attached. Effect of the Invention

[0016] According to the present invention, it is possible to provide a cosmetic patch set that can be applied simply and easily and is highly convenient. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1A is a front view and FIG. 1B is a rear view showing an example of an adhesive material set according to the present embodiment. [Diagram 2] 1A and 1B are a front view and a rear view, respectively, showing another example of an adhesive material set according to the present embodiment. [Diagram 3] 1A and 1B are a front view and a rear view, respectively, showing yet another example of an adhesive material set according to the present embodiment. [Figure 4] FIG. 1 is a schematic cross-sectional view of a patch set according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a mode for carrying out the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings, but the present invention is not limited thereto, and various modifications are possible without departing from the gist of the present invention. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference symbols. The drawings are schematic and do not necessarily correspond to actual dimensions, ratios, etc. The drawings may also include parts with different dimensional relationships and ratios.

[0019] [Adhesive material set] Fig. 1 is a front view (A) and a back view (B) showing an example of an adhesive material set according to the present embodiment. As shown in Fig. 1, the adhesive material set 1 according to the present embodiment (hereinafter, also referred to as "adhesive material set 1") includes a first retaining material 20 serving as a sheet-like base material, a plurality of adhesive materials 10 on the first retaining material 20, a portion of which, being an end portion, protrudes from the first retaining material 20 to form a gripping portion 15, and a plurality of second retaining materials 22 attached to the gripping portion 15 of each adhesive material 10 so as to cover the gripping portion 15 protruding from the first retaining material 20 on the surface of the adhesive material 10 on which the first retaining material 20 is provided. Hereinafter, with respect to the surface of the first retaining material 20, the surface on which the adhesive material 10 is provided as shown in Fig. 1(A) is referred to as the front surface, and the surface on which no adhesive material is provided as shown in Fig. 1(B) is referred to as the back surface.

[0020] In the embodiment shown in Fig. 1, a plurality of adhesive materials 10 are attached to the front surface of the first retaining material 20. The number of adhesive materials 10 attached is not particularly limited as long as it is a plurality, and a plurality of adhesive materials 10 are arranged within a range that does not impair the convenience of the user, for example, 2 or more, 3 or more, 4 or more, 5 or more, 6 or more, 7 or more, 8 or more, 9 or more, 10 or more, etc. In addition, the number of adhesive materials 10 attached may be an even number or an odd number.

[0021] The multiple patches 10 may each have the same shape, or may have different shapes. The multiple patches 10 may include patches of multiple types of shapes, for example, multiple patches having a first shape and multiple patches having a second shape. Similarly, the multiple patches 10 may each have the same size, or may have different sizes. The multiple patches 10 may include patches of multiple sizes, for example, multiple patches having a first size and multiple patches having a second size.

[0022] The multiple patches 10 may be arranged randomly or regularly on the first retaining material 20. As shown in Fig. 1, it is preferable that the multiple patches 10 are arranged regularly with respect to the axis of symmetry of the first retaining material 20, since this is convenient for the user. For example, when the first retaining material 20 has an axis of linear symmetry, a pair of multiple patches 10 may be arranged so as to be substantially symmetrical with respect to the axis of linear symmetry. When the first retaining material 20 has an axis of point symmetry, the multiple patches 10 may be arranged so as to be substantially rotationally symmetrical with respect to the axis of point symmetry.

[0023] In one embodiment, the multiple patches 10 are arranged so that they do not come into contact with adjacent patches. The distance between each patch 10 and the closest patch may be 0.05 cm or more, 0.10 cm or more, 0.15 cm or more, 0.20 cm or more, 0.30 cm or more, or 0.40 cm or more, and may be 1.0 cm or less, 0.80 cm or less, or 0.60 cm or less. By arranging the patches 10 so that they do not come into contact with adjacent patches, each patch 10 can be peeled off from the first retaining material 20 more easily.

[0024] Figure 2 is (A) a front view and (B) a rear view of another embodiment of the patch set 1. In Figure 1, a pair of patch materials arranged substantially symmetrically with respect to the symmetry axis of the first retaining material 20 are arranged in the same direction in multiple locations, whereas in Figure 2, a pair of patch materials arranged substantially symmetrically with respect to the symmetry axis of the first retaining material 20 are arranged in different directions in multiple locations.

[0025] Fig. 3 is (A) a front view and (B) a back view of yet another embodiment of the patch set 1. In Figs. 1 and 2, a plurality of patches 10 are arranged on the first retaining material 20, whereas in Fig. 3, one patch 10 is arranged on the first retaining material 20.

[0026] 2 and 3, the configuration other than the arrangement or number of patches 10 may be the same as or similar to the embodiment shown in Fig. 1. In other words, the patch set 1 may include one or more sheet-like patches that are attached to and held on a first holding material and that are used by being attached to human skin.

[0027] Below, an example of the configuration of the patch set 1 is shown, but it does not necessarily have to have the configuration shown below. For the configuration and manufacturing method of the first retaining material and the patch, reference can be made to Japanese Patent No. 4672799.

[0028] (1st holding material) The first retaining material 20 improves the ease of handling of the patch set 1 by retaining one or more patches 10. The first retaining material 20 is preferably a sheet-like substrate capable of stably retaining the patches 10 and allowing the retained patches 10 to be easily peeled off. In one embodiment, the first retaining material 20 is a sheet-like substrate generally called release paper, release paper, release liner, or the like in the technical field of adhesive tapes. In one embodiment, the first retaining material 20 is, for example, a polyethylene terephthalate film with a silicone-treated surface, a laminate of polyethylene with a silicone-treated surface and paper, or the like.

[0029] The size and shape of the first retaining material 20 are not particularly limited as long as it can retain a plurality of patches 10. In one embodiment, the first retaining material 20 is a circle, an ellipse, or a polygon such as a rectangle. In one embodiment, the length of the longest part of the first retaining material 20 is, for example, 3 cm or more and 50 cm or less.

[0030] (Adhesive material) The patch set 1 comprises one or more patches 10. Therefore, a user of the patch set 1 can easily use the required number of patches 10. For example, compared to when the patch is a single sheet, the effort of cutting out a portion of the required size and shape from a single sheet is eliminated, and the occurrence of wrinkles during cutting can be suppressed. The patch set 1 may comprise one patch 10. The patch set 1 may comprise multiple patches 10.

[0031] The size and shape of the patch 10 can be appropriately selected according to the application. In one embodiment, the patch 10 has a length of the longest part of, for example, 1.0 cm to 10 cm, or 3.0 cm to 7.0 cm. In one embodiment, the patch 10 is, for example, substantially rectangular, substantially square, substantially triangular, other polygonal, substantially circular, substantially crescent-shaped, substantially elliptical, or substantially teardrop-shaped, or a partial shape of these.

[0032] In one embodiment, the patch 10 includes a straight portion and a curved portion. In this case, the patch 10 can be suitably attached to a three-dimensional portion such as the face. In one embodiment, the patch 10 is composed of two straight portions and one curved portion. In one embodiment, the curved portion is an approximately circular arc or an approximately elliptical arc. In one embodiment, the patch includes a curved portion that is convexly curved. In one embodiment, the patch 10 is composed of two straight portions that form an angle of approximately 90° and one curved portion that connects both ends of the two straight portions, and in this case, has a shape of an approximately right-angled triangle with a curved hypotenuse.

[0033] In one embodiment, the patch 10 has a shape with chamfered corners. That is, in this embodiment, the patch 10 does not have any acute or obtuse corners. If the patch 10 has corners, the patch 10 tends to peel off from the corners after it is attached to the skin. Therefore, by not having corners, the patch 10 can be made to be less likely to peel off during use. In one embodiment, the patch 10 is composed of two straight parts that form an angle of approximately 90° and one curved part that connects both ends of the two straight parts, and the corners of each connection part between the two straight parts and the curved part are chamfered, and in this case, it has a shape in which the hypotenuse of the approximately right-angled triangle is curved and each corner is chamfered.

[0034] Conventional adhesive materials tend to be used such that the adhesive material is peeled off from a holding material such as a release paper starting from a corner. In conventional adhesive materials, even if the corners are chamfered to improve durability of use (difficulty in peeling), the ease of handling during application (ease of peeling off from the holding material) tends to decrease. On the other hand, in the adhesive material set 1 according to the present embodiment, the adhesive material 10 can be peeled off from the first holding material 20 by gripping the gripping portion 15 as described above, so that even if the corners are chamfered, the ease of handling during application (ease of peeling off from the holding material) can be maintained, and an adhesive material that combines durability and convenience can be obtained. The radius of curvature in the chamfered portion may be, for example, 0.05 cm or more and 1.0 cm or less.

[0035] The patch 10 has a gripping portion 15 that protrudes from the first retaining material 20 because the patch 10 is provided with an end portion thereof that protrudes from the first retaining material 20. The gripping portion 15 is a portion that is not in contact with the first retaining material 20, and is a portion that does not overlap with the first retaining material 20 when the patch set 1 is viewed from the front of the first retaining material 20.

[0036] In one embodiment, the gripping portion 15 has a shape and area that is completely covered by the user's fingers when the user grips it. For example, the gripping portion 15 may have a shape and area that can be completely covered by the first joint when an adult grips it with the thumb and index finger, and may have a shape and area that can be completely covered by the first joint when an adult grips it with the thumb and middle finger. In this way, when the patch 10 is applied while being pulled, the gripping portion 15 is uniformly stretched or deformed, so that the occurrence of wrinkles due to uneven stretching or deformation of the patch is suppressed. In order to obtain such a shape and area, for example, the gripping portion 15 may have h1 and d1, which will be described later, within the ranges described later.

[0037] As shown in FIG. 1(A), the patch 10 has a boundary line S of the gripping portion 15 derived from the end shape of the first holding material 20. The linear distance between both ends of the boundary line S is defined as h1, and the maximum length of the patch 10 parallel to the line segment connecting both ends of the boundary line S is defined as h max The maximum length of the gripping portion 15 from the line segment connecting both ends of the boundary line S is d1, and the maximum length of the part of the adhesive material 10 attached to the first holding material 20 from the line segment connecting both ends of the boundary line S is d max In addition, when the end of the adhesive material 10 has a curved shape, the boundary line S also has a curved shape. In this case, the straight line distance between both ends of the boundary line S is h1, and the maximum length of the adhesive material 10 parallel to the line segment connecting both ends of the boundary line S is h max The maximum length of the gripping portion 15 from the curved line connecting both ends of the boundary line S is d1, and the maximum length of the part of the adhesive material 10 attached to the first holding material 20 from the curved line connecting both ends of the boundary line S is d max Let us assume that.

[0038] h1 may be, for example, 0.5 cm or more, 0.7 cm or more, 0.9 cm or more, or 1.0 cm or more, and may be 2.0 cm or less, 1.8 cm or less, 1.5 cm or less, 1.4 cm or less, or 1.3 cm or less. h maxmay be, for example, 0.8 cm or more, 1.0 cm or more, 1.5 cm or more, 1.8 cm or more, or 2.0 cm or more, and may be 8.0 cm or less, 7.0 cm or less, 5.0 cm or less, 4.0 cm or less, 3.0 cm or less, or 2.5 cm or less. h for h1 max The ratio may be 1.1 times or more, 1.2 times or more, 1.5 times or more, 1.7 times or more, or 1.9 times or more, and may be 5.0 times or less, 4.0 times or less, 3.0 times or less, or 2.5 times or less.

[0039] d1 may be, for example, 0.3 cm or more, 0.4 cm or more, 0.5 cm or more, 0.7 cm or more, 0.8 cm or more, or 0.9 cm or more, and may be 1.8 cm or less, 1.5 cm or less, 1.4 cm or less, 1.3 cm or less, or 1.2 cm or less. d max may be, for example, 1.0 cm or more, 1.5 cm or more, 1.8 cm or more, 2.0 cm or more, 2.5 cm or more, 2.8 cm or more, 3.0 cm or more, or 3.2 cm or more, and may be 10 cm or less, 9.0 cm or less, 8.0 cm or less, 7.0 cm or less, 5.0 cm or less, 4.5 cm or less, 4.0 cm or less, or 3.8 cm or less. d for d1 max The ratio may be 1.5 times or more, 1.7 times or more, 2.0 times or more, 2.5 times or more, or 3.0 times or more, and may be 7.0 times or less, 6.0 times or less, 5.0 times or less, 4.5 times or less, or 4.0 times or less.

[0040] The gripping portion 15 may occupy, in terms of area, 1.0% or more, 3.0% or more, 5.0% or more, or 10% or more of the entire patch 10, and may occupy 50% or less, 40% or less, 30% or less, or 20% or less. The area of ​​the gripping portion 15 is, for example, 0.3 cm 2 More than or equal to 0.5 cm 2 It may be 3.0 cm or more. 2 Below, 2.5cm 2 Below, 2.0cm 2 Below, 1.5cm 2 Less than or equal to 1.0 cm 2 It may be the following:

[0041] In one embodiment, the gripping portion 15 is, for example, a partial shape of a substantially rectangular shape, a substantially square shape, a substantially triangular shape, another polygonal shape, or a substantially circular shape, a substantially crescent shape, a substantially elliptical shape, or a substantially teardrop shape. In one embodiment, the gripping portion 15 includes a straight portion and a curved portion. In one embodiment, the gripping portion 15 is composed of two straight portions and one curved portion. In one embodiment, the curved portion is substantially arc-shaped or substantially elliptical arc-shaped. In one embodiment, the gripping portion 15 includes a curved portion that is curved convexly. The gripping portion 15 has a shape in which a portion of the adhesive material 10 is partially cut out by the end of the first retaining material 20. In one embodiment, the gripping portion 15 is composed of two straight portions that form an angle of approximately 90° and one curved portion that connects both ends of the two straight portions, and in this case, has a shape in which the hypotenuse of the substantially right-angled triangle is curved.

[0042] In one embodiment, the patch 10 has a generally tapered portion that, in plan view, becomes continuously thicker from the gripping portion 15 toward the first retaining material 20. In this case, the gripping portion 15 is configured to be relatively small when compared with the entire patch 10, so that it is easy to grasp the gripping portion 15 and peel the patch 10 from the first retaining material 20. In addition, the area of ​​the portion of the patch 10 opposite the gripping portion 15 is configured to be large, so that the proportion of the entire area of ​​the patch 10 that is held by the first retaining material 20 increases, and unintentional peeling of the patch 10 from the first retaining material 20 is suppressed. Furthermore, by continuously (i.e., gradually) becoming thicker from the gripping portion 15 toward the first retaining material 20, the handleability of the patch 10 is improved when the patch 10 is attached to the skin while being pulled.

[0043] The material and layer structure constituting the patch 10 are not particularly limited as long as they can be used as a patch. FIG. 4 shows an example of a preferred embodiment of the schematic cross-sectional view of the X-X' line in FIG. 1. In the embodiment shown in FIG. 4, the patch (10, 10a, 10b) comprises, in order from the first retaining material 20 side, an adhesive layer (11a, 11b (collectively referred to as "11")), a base layer (12a, 12b (collectively referred to as "12")), and a protective layer (13a, 13b (collectively referred to as "13")). In the embodiment shown in FIG. 4, the thickness of the adhesive layer and the base layer can be made very thin, and the patch can be adapted to fine irregularities (fine grooves) of the skin when applied, and can easily follow the movement of the skin without the application site being noticeable. In addition, even if the patch is very thin and requires a certain degree of skill in handling, it can be made into a cosmetic patch set that can be applied simply and easily and is highly convenient by configuring it in the shape and arrangement as described above.

[0044] The adhesive layer 11 is a layer for imparting adhesiveness to the patch 10. The adhesive layer 11 preferably has an adhesive strength sufficient to hold the patch 10 on the first holding material 20, and has a configuration that does not place an excessive burden on the skin when the patch 10 is attached to the skin.

[0045] Examples of the adhesive contained in the adhesive layer 11 include a rubber-based adhesive, an acrylic-based adhesive, a silicone-based adhesive, etc. From the viewpoints of being less likely to cause skin rash when applied, being transparent, and being easy to adjust the adhesive properties, it is preferable that the adhesive layer 11 contains an acrylic-based adhesive.

[0046] In one embodiment, the acrylic pressure-sensitive adhesive is a copolymer (hereinafter, sometimes referred to as "acrylic acid ester copolymer") containing at least one monomer unit selected from the group consisting of acrylic acid alkyl esters and methacrylic acid alkyl esters having an alkyl group having 8 to 12 carbon atoms at a ratio of 70% by weight or more. As the monomer, acrylic acid alkyl esters are preferable, and more specifically, for example, 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, and isononyl acrylate are more preferable.

[0047] The acrylic acid ester copolymer preferably contains 70% by weight or more, and more preferably 80% by weight or more, of alkyl acrylate and / or alkyl methacrylate units having an alkyl group having 8 to 12 carbon atoms. The acrylic acid ester copolymer may be a copolymer of one or more of the above monomers, but is more preferably a copolymer with another comonomer.

[0048] Examples of other comonomers include monomers having a carboxyl group, such as acrylic acid and methacrylic acid; and monomers having a hydroxyl group, such as hydroxyethyl acrylate and hydroxypropyl acrylate, which contain a functional group. As other comonomers, various monomers such as vinyl acetate, styrene, vinylpyrrolidone, and acrylamide can also be used. Furthermore, acrylic acid alkyl esters or methacrylic acid alkyl esters having an alkyl group other than an alkyl group having 8 to 12 carbon atoms, such as ethyl acrylate and butyl acrylate, can also be used as comonomers.

[0049] In one embodiment, the acrylic acid ester copolymer is a copolymer obtained by copolymerizing 70 to 95% by weight of at least one monomer selected from the group consisting of acrylic acid alkyl esters and methacrylic acid alkyl esters having an alkyl group having 8 to 12 carbon atoms, 1 to 10% by weight of a comonomer having a functional group, and 0 to 25% by weight of other comonomers.

[0050] The acrylic adhesive can be prepared by solution polymerization of the above-mentioned monomer components in an organic solvent such as toluene, hexane, ethyl acetate, etc., using a peroxide such as benzoyl peroxide or an azo compound such as AIBN (azobisisobutyronitrile) as an initiator under a nitrogen atmosphere. The acrylic adhesive can also be prepared by emulsifying and dispersing the monomer components in water with an emulsifier, followed by emulsion polymerization. A crosslinking agent such as an epoxy resin may be added to the acrylic adhesive to crosslink it in the adhesive layer formation step.

[0051] In one embodiment, the thickness of the adhesive layer 11 is 1.0 μm to 20 μm, 1.0 μm to 15 μm, 1.0 μm to 12 μm, 1.0 μm to 8.0 μm, or 1.0 μm to 6.0 μm. When the thickness of the adhesive layer 11 is equal to or less than the upper limit, the adhesive layer 11 can easily conform to wrinkles and fine unevenness of the skin. When the thickness of the adhesive layer 11 is equal to or more than the lower limit, the adhesive layer can easily be formed uniformly.

[0052] The adhesive strength of the adhesive layer 11 is preferably adjusted so that the 90 degree peel strength against a Bakelite plate measured at a crosshead moving speed of 300±30 mm per minute in accordance with JIS Z 0237 is 0.1 N / 10 mm or more. This peel strength is a characteristic that corresponds to the adhesive strength of the adhesive layer 11. The peel strength of the adhesive layer 11 is preferably 0.1 to 3 N / 10 mm, more preferably 0.2 to 3 N / 10 mm. By setting the peel strength (adhesive strength) within an appropriate range, it is possible to suppress rash at the application site and to facilitate peeling of the patch 10 from the skin.

[0053] The base layer 12 is a layer that is exposed when the patch is used. In one embodiment, the base layer 12 is composed of a thin layer of polyurethane elastomer. A polyurethane elastomer is an elastomer having a urethane group in the molecule, and is produced by a polyaddition reaction between a polyol component and a diisocyanate component. A long-chain diol is used as the polyol component, and in addition, a short-chain diol may be used in combination as a chain extender. In addition, a crosslinking agent such as a monomolecular polyol such as trimethylolpropane, glycerin, or sorbitol may be used. The manufacturing technology of polyurethane elastomers is well known in the art.

[0054] Polyurethane elastomers are classified according to the type of polyol component that constitutes the soft segment, since the type of polyol component greatly affects the properties of the elastomers. Specifically, polyurethane elastomers are roughly classified into: (1) caprolactone-based polyurethane elastomers synthesized by polyaddition reaction between polylactone ester polyol obtained by ring-opening polymerization of caprolactone and diisocyanate, (2) adipic acid ester-based polyurethane elastomers synthesized by polyaddition reaction between adipic acid ester polyol of adipic acid and glycol and diisocyanate, and (3) polyether-based polyurethane elastomers synthesized by polyaddition reaction between polyether polyol such as polytetramethylene glycol obtained by ring-opening polymerization of tetrahydrofuran and diisocyanate.

[0055] Polyurethane elastomers are excellent in mechanical properties such as tensile strength and tear strength, abrasion resistance, low-temperature properties, flexibility, etc., and may also have ultraviolet absorption properties, water absorption properties, moisture permeability, etc. Cosmetic patches having a thin polyurethane elastomer film as a base layer conform well to fine irregularities such as wrinkles and skin grooves, and are unlikely to cause discomfort when applied to the skin.

[0056] A cosmetic patch having a polyurethane elastomer thin film as a base layer tends not to accumulate sweat or cause stuffiness at the site of application because the base layer can have water absorption and moisture permeability. Therefore, in an embodiment in which the base layer 12 is composed of a thin layer of polyurethane elastomer, it tends not to cause rash or itching at the site of application. The polyurethane elastomer thin film can have water absorption and is compatible with water, so that cosmetics can be easily applied. Among these polyurethane elastomers, polyether polyurethane elastomers are preferred.

[0057] Examples of diisocyanates constituting the polyurethane elastomer include aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate, tolidine diisocyanate, and naphthalene diisocyanate; and aliphatic diisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, dicyclohexylmethane diisocyanate, and hydrogenated xylene diisocyanate, but are not limited to these.

[0058] Caprolactone-based polyurethane elastomers use polylactone ester polyols obtained by ring-opening polymerization of caprolactone as the polyol component. Adipate-based polyurethane elastomers use adipate ester polyols of adipic acid and glycol as the polyol component. Polyether-based polyurethane elastomers use bifunctional polyether polyols such as poly(oxypropylene) glycol (PPG) and poly(oxytetramethylene) glycol (PTMG) as the polyol component.

[0059] In one embodiment, the base layer 12 is a polyurethane elastomer layer having a glass transition temperature of 0° C. or lower. The glass transition temperature (Tg) of the polyurethane elastomer is preferably −10° C. or lower, and may be, for example, −70° C. or higher. The glass transition temperature can be measured using a differential scanning calorimeter (DSC). The patch 10 of the patch set 1 is used by being attached to a skin surface at about 36.5° C., and the low glass transition temperature of the base layer 12 can improve the flexibility of the patch 10 during attachment. Since the polyurethane elastomer has a low glass transition temperature, it has excellent flexibility at temperatures around body temperature and is excellent in compatibility with the skin surface and applicability of cosmetics.

[0060] Examples of polyether polyurethane elastomers include Elastollan (registered trademark) (1180A, 1190ATR, 1195ATR, 1198ATR, 1154D, 1164D, ET385, ET880, ET885, ET890, ET858D, ET860D, ET864D, NY90A, NY97A, ET370) from BASF Japan Ltd., and Miractoran (registered trademark) from Nippon Miractoran Co., Ltd. trademark) (E300 series, P300 series), Resamine (registered trademark) (P-2000 series) from Dainichi Seikagaku Kogyo Co., Ltd., and Pandex (registered trademark) (T8175, T8180, T8185, T8190, T8195, DP9370A, 5377A, 588, KU2-8659, DP5094A) from DIC Bayer Polymer Ltd.

[0061] In one embodiment, the thickness of the base layer 12 is 1.0 μm to 20 μm, 1.0 μm to 15 μm, 1.0 μm to 10 μm, 1.0 μm to 8.0 μm, 1.0 μm to 6.0 μm, or 1.0 μm to 5.0 μm. By having the thickness of the base layer 12 be equal to or less than the upper limit, the base layer 12 tends to have high moisture permeability, be less noticeable when applied, and have high compatibility with the surface of the skin and follow the movement of the skin. By having the thickness of the base layer 12 be equal to or more than the lower limit, the base layer 12 has sufficient strength and is more excellent in handleability.

[0062] In one embodiment, the back surface of the base layer 12 (the surface of the base layer 12 facing the protective layer 13) is embossed. The embossing can be performed by passing the base layer 12 through an embossing roll. When the base layer 12 is formed by a solution casting method using a polyurethane elastomer layer, the embossing can be performed by casting the polyurethane elastomer layer onto the protective layer 13 having fine projections and recesses on its surface. Therefore, in this specification, embossing includes not only mechanical treatment using an embossing roll, but also other methods capable of forming fine projections and recesses on the surface of the base layer 12.

[0063] In one embodiment, the total thickness of the pressure-sensitive adhesive layer 11 and the base layer 12 is 2.0 μm or more and 30 μm or less, 2.0 μm or more and 25 μm or less, 2.0 μm or more and 20 μm or less, 2.0 μm or more and 15 μm or less, 2.0 μm or more and 10 μm or less, or 2.0 μm or more and 7.0 μm or less. The thicknesses of the pressure-sensitive adhesive layer 11 and the base layer 12 can be measured with a dial gauge.

[0064] The protective layer 13 is a layer for protecting the base layer 12 from external impacts and the like before use of the patch 10, and for improving the ease of handling when applying the patch 10. In one embodiment, the protective layer 13 is what is generally called release paper, release paper, release liner, or the like in the technical field of adhesive tapes. In one embodiment, the protective layer 13 is a film containing a thermoplastic resin such as polyurethane, polyethylene, polypropylene, ionomer, polyamide, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate copolymer, thermoplastic polyester, polytetrafluoroethylene, or the like. In one embodiment, the protective layer 13 is a film containing a biodegradable plastic such as polyhydroxybutyrate, polyhydroxybutyrate resin, polyhydroxyalkanoate, maltotriose, polylactic acid, polylactic acid-based resin, polyethylene succinate, polyethylene succinate resin, polybutylene succinate resin, polycaprolactone resin, polybutylene adipate terephthalate, polytetramethylene adipate terephthalate, polyethylene terephthalate resin, polyvinyl alcohol, polyglycolic acid, starch fatty acid ester, starch processing resin, starch polyester, cellulose acetate, chitosan, etc. The various films may be in a state of being laminated on paper. It is preferable that the protective layer 13 is made of a material that is thicker and easier to handle than the base layer 12.

[0065] (Second holding material) As shown in FIG. 1(B), each patch 10 is provided with a second retaining material 22 that protects the application surface of the gripping portion 15 and serves as a base material. That is, the first retaining material 20 is provided on a portion of the application surface of each patch 10, and the second retaining material 22 is provided on another portion (the application surface of the gripping portion 15). The second retaining material 22 protects the application surface of the gripping portion 15 and improves the handling of the patch 10. The second retaining material 22 is preferably a member that can stably hold the patch 10 and can be easily peeled off from the patch 10. In one embodiment, the second retaining material 22 can be what is generally called release paper, release paper, release liner, etc. in the technical field of adhesive tapes. In one embodiment, the second retaining material 22 is, for example, a polyethylene terephthalate film with a silicone-treated surface, a laminate of polyethylene with a silicone-treated surface and paper, etc. In one embodiment, the second retaining material 22 is made of the same material as the first retaining material 20.

[0066] The second retaining material 22 is configured to be separable from the first retaining material 20. In one embodiment, the first retaining material 20 and the second retaining material 22 are configured as separate members that are physically separated. In one embodiment, the first retaining material 20 and the second retaining material 22 have a cut at the boundary portion to assist in separating them from each other. The cut may be linear or curved, and may be a solid line or a dashed line.

[0067] In one embodiment, the second retaining material 22 may be provided on the entire application surface of the gripping portion 15, or may be provided on a portion of the application surface of the gripping portion 15. In one embodiment, the second retaining material 22 may have the same shape as the gripping portion 15. In this case, as shown in FIG. 1(A), the second retaining material 22 is configured so that it is not visible from the front of the patch set, and as shown in FIG. 1(B), the gripping portion 15 is configured so that it is not visible from the back of the patch set. The second retaining material 22 may cover 80% or more, 90% or more, or 95% or more of the entire gripping portion 15 in terms of area, and may cover 100% or less, 98% or less, 95% or less, 90% or less, or 85% or less.

[0068] [How to use] The patch set 1 is used by peeling off one or more of the one or more patches 10 and applying them to an application location. In one embodiment, a method of using the patch set 1 includes gripping the gripping portion 15 of the patch 10 and peeling the patch 10 from the first retaining material 20, applying at least a portion of the application surface of the patch 10 to an application target, peeling the second retaining material 22 from the applied patch 10, and applying the application surface of the gripping portion 15 exposed by peeling off the second retaining material 22 to the application target. In other words, the patch set 1 is used by grasping the gripping portion 15 of the patch 10, peeling the patch 10 from the first retaining material 20, and attaching it to the application location, peeling off the second retaining material 22, and then attaching the entire patch 10 to the application location.

[0069] By using the patch set 1 in this way, a cosmetic patch, which is generally very thin and difficult to handle, can be easily applied to the skin. In addition, because the second retaining material 22 is provided in the gripping portion 15, when the patch 10 is first applied to the application location, it is easy to apply the patch 10 while pulling it, and for example, the patch 10 can be applied while lifting up the application location. In addition, because the second retaining material 22 is provided in the gripping portion 15, the application can be performed without directly touching the application surface (adhesive surface) of the gripping portion 15, and therefore a decrease in adhesive strength caused by touching the application surface with the hand during application can be prevented.

[0070] The patch set 1 according to the present embodiment is used by applying it to skin (skin with scars, etc.) with, for example, wrinkles, sagging skin, age spots, birthmarks, freckles, pores, scars, acne scars, burn scars, discoloration due to skin disease, etc., so as to cover the scars, etc., and, if desired, applying cosmetics on top of it. This makes it possible to conceal the scars, etc., and make them less noticeable by making them look similar to the surrounding healthy skin. Applying cosmetics means applying various cosmetics to the skin including the cosmetic patch and spreading it as in normal makeup.

[0071] The patch 10 conforms to the fine irregularities (microscopic grooves) of the skin, is not noticeable where it is applied, can easily follow the movement of the skin, is unlikely to cause rashes, can protect the skin from cosmetics and ultraviolet rays, and allows the application of cosmetics in the applied state. Conforming to the fine irregularities of the skin means that the patch fits into the fine irregularities of the skin, including skin grooves, and presents an appearance similar to that of the skin.

[0072] The patch 10 is advantageous in that it is less likely to cause rashes or itchiness due to sweat accumulation or steaming. When applying cosmetics, if a liquid such as water is applied to the back surface of the base layer 12, the base layer 12 becomes soft, allowing it to blend more easily with the skin surface and allowing the cosmetics to be applied more easily.

[0073] The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The elements of the embodiments, as well as their arrangements, materials, conditions, shapes, sizes, etc., are not limited to those shown as examples and can be changed as appropriate. In addition, configurations shown in different embodiments can be partially substituted or combined with each other.

[0074] [Note] The present invention includes the following embodiments. [1] A first holding material serving as a sheet-like base material; and a sheet-like adhesive material that is attached to and held on the first holding material and is attached to human skin for use, a part of the adhesive material protruding from the first holding material to form a gripping portion; A second holding material serving as a base material is attached to a surface of the gripping portion on the side of the first holding material, The second holding material is configured to be separable from the first holding material. Adhesive material set. [2] The adhesive material has chamfered corners. [1] A patch set as described in the above. [3] The adhesive material has a generally tapered portion that is continuously tapered from the grip portion toward the first holding material in a plan view. A patch set according to [1] or [2]. [4] The adhesive material is attached and held on the first holding material in plurality, The adhesive materials are arranged so as not to come into contact with adjacent adhesive materials. A patch set according to any one of [1] to [3]. [5] The grip portion has a shape and area that is completely covered by the user's fingers when the user grips the grip portion. A patch set according to any one of [1] to [4]. [6] The area of ​​the gripping portion is 30% or less of the entire area of ​​the patch. A patch set according to any one of [1] to [5]. [7] The adhesive material comprises, in order from the first holding material side, a pressure-sensitive adhesive layer, a base layer, and a protective layer. A patch set according to any one of [1] to [6]. [8] the base layer contains a polyurethane elastomer having a glass transition temperature of 0° C. or lower, the pressure-sensitive adhesive layer comprises an acrylic pressure-sensitive adhesive made of a copolymer containing at least one monomer unit selected from the group consisting of an acrylic acid alkyl ester and a methacrylic acid alkyl ester, each having an alkyl group having 8 to 12 carbon atoms, in a ratio of 70% by weight or more; The thickness of the base layer is 1.0 μm or more and 20 μm or less, the thickness of the pressure-sensitive adhesive layer is 1.0 μm or more and 20 μm or less, and the total thickness of both layers is 2.0 μm or more and 30 μm or less. [7] A patch set as described in the above. [9] The polyurethane elastomer is a polyether-based polyurethane elastomer. [8] A patch set as described in the above.

[10] The alkyl acrylate is at least one selected from the group consisting of 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, and isononyl acrylate. A patch set according to [8] or [9].

[11] A method for using the patch set according to any one of [1] to

[10] , gripping the gripping portion of the patch and peeling the patch from the first holding material; Sticking at least a part of the adhesive surface of the adhesive material to an object to be attached; Peeling off the second holding material from the applied patch; Peeling off the second holding material to attach the exposed attachment surface of the gripping portion to an attachment target; A method comprising: [Explanation of symbols]

[0075] 1...adhesive set, 10...adhesive, 11...adhesive layer, 12...base layer, 13...protective layer, 15...gripping portion, 20...first holding material, 22...second holding material.

Claims

1. A first holding material serving as a sheet-like base material; and a sheet-like adhesive material that is attached to and held on the first holding material and is attached to human skin for use, a part of the adhesive material protruding from the first holding material to form a gripping portion; A second holding material serving as a base material is attached to a surface of the gripping portion on the side of the first holding material, The second holding material is configured to be separable from the first holding material. Adhesive material set.

2. The adhesive material has chamfered corners. The patch set according to claim 1 .

3. The adhesive material has a generally tapered portion that is continuously tapered from the grip portion toward the first holding material in a plan view. The patch set according to claim 1 .

4. A plurality of the adhesive materials are attached and held on the first holding material, The adhesive materials are arranged so as not to come into contact with adjacent adhesive materials. The patch set according to claim 1.

5. The grip portion has a shape and area that is completely covered by the user's fingers when the user grips the grip portion. The patch set according to claim 1.

6. The area of ​​the gripping portion is 30% or less of the entire area of ​​the patch. The patch set according to claim 1 .

7. The adhesive material includes, in order from the first holding material side, a pressure-sensitive adhesive layer, a base layer, and a protective layer. The patch set according to claim 1.

8. the substrate layer contains a polyurethane elastomer having a glass transition temperature of 0° C. or lower, the pressure-sensitive adhesive layer comprises an acrylic pressure-sensitive adhesive made of a copolymer containing at least one monomer unit selected from the group consisting of an acrylic acid alkyl ester and a methacrylic acid alkyl ester, each having an alkyl group having 8 to 12 carbon atoms, in a ratio of 70% by weight or more; The thickness of the base layer is 1.0 μm or more and 20 μm or less, the thickness of the pressure-sensitive adhesive layer is 1.0 μm or more and 20 μm or less, and the total thickness of both layers is 2.0 μm or more and 30 μm or less. The patch set according to claim 7.

9. The polyurethane elastomer is a polyether-based polyurethane elastomer. The patch set according to claim 8.

10. The alkyl acrylate is at least one selected from the group consisting of 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, and isononyl acrylate. The patch set according to claim 8.

11. A method for using the patch set according to any one of claims 1 to 10, comprising: gripping the gripping portion of the adhesive material and peeling the adhesive material off from the first holding material; Sticking at least a part of the adhesive surface of the adhesive material to an object to be attached; Peeling off the second holding material from the applied adhesive material; Peeling off the second holding material to attach the exposed attachment surface of the gripping portion to an attachment target; A method comprising:

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