JP6147874B2 - Skin masking material - Google Patents

Description

  The present invention relates to a skin masking material to be applied to the skin.

  If a person with an extraordinary part such as wrinkles or spots on the skin, such as the face, wants to hide the extraneous part from others. For this reason, cosmetics such as a foundation and a concealer have been used to make up covering different parts. However, since cosmetics run off when touching sweat and peel off when touching hands and objects, it is not possible to coat foreign parts with sufficient security.

  In contrast, Patent Document 1 discloses a skin masking material in which a pressure-sensitive adhesive layer is laminated on one surface of a film layer, and fine irregularities are formed on the other surface of the film layer. When the skin masking material described in Patent Document 1 is applied to a foreign part, the foreign part is covered and concealed. Furthermore, when a cosmetic is applied onto the skin masking material after application, the powder contained in the cosmetic is attached to the other surface, making the skin masking material less noticeable.

Japanese Patent Laid-Open No. 10-23923

  However, in the skin masking material described in Patent Document 1, even if the cosmetic is applied to the other surface, it is considered that most of the powder contained in the cosmetic slips from the other surface. In addition, even if cosmetics are layered on the other side and applied to a certain thickness, the makeup will come off as soon as the hand or object touches it, and it will be impossible to keep the cosmetics in a stable state. It is done. If the makeup is poor, the user cannot adjust the color of the other side with makeup to match the color of the skin, and the trace of makeup peeling off will be noticeable.

  Therefore, the present invention provides a skin masking material that is applied to the skin to conceal the site when a portion that appears to be abnormal on the skin has occurred, and is applied to the surface of the applied skin masking material. Furthermore, the present invention provides a skin masking material having a good makeup paste when a cosmetic is applied.

  The inventor of the present invention has studied the cosmetic paste of the skin masking material as follows. Cosmetics such as foundations and concealers vary greatly in the range of the average particle size of the powder from about 0.1 to 60 μm depending on the type. Depending on the size of the average particle size, it is considered that the height difference of the unevenness suitable for holding the powder varies. However, in patent document 1, the magnitude | size of the particle size of the powder contained in cosmetics, and the magnitude | size of the height difference of the unevenness | corrugation formed in the other surface are not examined. Even if the skin masking material described in Patent Document 1 is used, the difference in height of the irregularities formed on the other surface is small, so that the powder contained in the cosmetic is not sufficiently retained on the other surface, and the makeup paste is poor. it is conceivable that.

  The present inventor said that whether or not the skin masking material has good makeup is determined by the ratio between the height difference of the unevenness formed on the other surface and the particle size of the powder contained in the cosmetic. Under consideration, a skin masking material having a ten-point average roughness Rz on the other side larger than the average particle diameter of the powder contained in the cosmetic was used. As a result, the present inventors have found that a skin masking material with a significantly superior makeup paste can be provided compared to the case where Rz on the other surface is less than the average particle size.

  That is, in order to achieve the above-mentioned object, the skin masking material according to the present invention is a makeup in which a pressure-sensitive adhesive layer is laminated on at least a part of one surface of a stretchable film layer and applied to the other surface of the film layer. When the average particle diameter of the powder contained in the material is d and the thickness of the film layer is w, the ten-point average roughness Rz of the other surface is d ≦ Rz ≦ 60d, and Rz ≦ w It is.

  Alternatively, the skin masking material according to the present invention has a pressure-sensitive adhesive layer laminated on at least a part of one surface of the stretchable film layer, and when the thickness of the film layer is w, Ten-point average roughness Rz is 6 μm ≦ Rz ≦ 40 μm, and Rz ≦ w.

  Further, fine particles may be dispersed in the film layer so that the total light transmittance of the film layer is 75 to 90%.

The water vapor transmission rate may be 400 g / (m ² · day) or more.

  The pressure-sensitive adhesive layer may contain 10 to 50% by weight of an organic compound having a polar group that is liquid at room temperature.

  The pressure-sensitive adhesive layer may contain a medicinal component for the skin.

  The medicinal component may include a compound selected from the group consisting of α-hydroxy acids, salicylic acid, and mixtures thereof.

  The medicinal component may include an antibacterial agent.

  The antibacterial agent may include a compound selected from the group consisting of isopropylmethylphenol, a silver-based antibacterial agent, and a mixture thereof.

  The medicinal component may comprise a non-steroidal anti-inflammatory drug.

  The material of the film layer may be polyether polyurethane or polyester polyurethane.

  The film layer may have a thickness w of 6 μm ≦ w ≦ 100 μm.

  According to the skin masking material according to the present invention having the above-described configuration, when the ten-point average roughness Rz of the other surface is d ≦ Rz ≦ 60d, the height difference of the unevenness formed on the other surface is a cosmetic. Is larger than the average particle diameter d of the powder contained in the powder, most of the powder enters the recesses of the recesses and is held in the recesses. Furthermore, in this case, since the Rz on the other surface is 60 times or less the average particle diameter d, the user can wipe off the powder that has entered the recess. In this case, since the user can adjust the amount of the cosmetic applied to the other side, the user can finely adjust the color of the other side to match the skin color while avoiding thick makeup. .

  Alternatively, according to the skin masking material according to the present invention, when the ten-point average roughness Rz of the other surface is 6 μm ≦ Rz ≦ 40 μm, the unevenness formed on the other surface compared to the conventional skin masking material. The height difference is large, and the powder contained in the cosmetic is easily held in the recess. Further, in this case, since the Rz of the other surface is Rz ≦ 40 μm, the height difference of the unevenness is not too large, and the powder held in the recess is particularly easy to wipe off. In this case, since the user can easily correct the makeup, it is not necessary to carefully adjust the hue.

  Therefore, according to the present invention, when a site that appears to be abnormal in appearance has occurred in the skin, the skin masking material is applied to the skin in order to conceal the site, and the skin masking material applied It is possible to provide a skin masking material having a good makeup paste when a cosmetic material is further put on the surface.

Sectional drawing which shows the skin masking material which concerns on Embodiment 1,2. Sectional drawing which shows the skin masking material which concerns on other embodiment in the case of using the composite film which laminated | stacked the urethane film and the hydrophobic film as a raw material of a film layer. Sectional drawing which shows the skin masking material which concerns on other embodiment in the case of using the composite film which laminated | stacked the film which has an unevenness | corrugation, and a red film as a raw material of a film layer. Sectional drawing which shows the skin masking material which concerns on other embodiment at the time of laminating | stacking an adhesive protective part and an uneven | corrugated protective part. (A) is sectional drawing which shows the skin masking material which concerns on other embodiment when the part by which an adhesive layer is not laminated | stacked is provided in the center part of one surface of a film layer, (b) is one surface of a film layer. It is sectional drawing which shows the skin masking material which concerns on other embodiment at the time of providing the part in which an adhesive layer is not laminated | stacked in the center part, and a grid | lattice-like adhesive layer, (c) is skin masking shown in (b) It is a front view at the time of seeing a material from the skin contact surface side of an adhesive layer.

[Embodiment 1]
As shown in FIG. 1, the skin masking material 2a which concerns on Embodiment 1 is the laminated body 14 provided with the film layer 4a and the adhesive layer 6a. The pressure-sensitive adhesive layer 6a is laminated on the one surface 12 of the film layer 4a.

  The film layer 4a has elasticity. When the skin masking material 2a is applied to the skin, at least a part of the film layer 4a is stretched following the curved surface of the skin. The skin masking material 2a can be affixed so that the entire skin contact surface 16 facing the one surface 12 in the adhesive layer 6a is in close contact with the curved skin.

  In order for the film layer 4a to have elasticity, it is preferable to use a film having a tensile modulus of 0.2 to 5 MPa as a material for the film layer 4a. When the tensile elastic modulus is less than 0.2 MPa, the film layer 4a expands and contracts more than necessary, so that it is difficult to remove the skin masking material 2a from the skin by picking it with a fingertip. When the tensile modulus exceeds 5 MPa, the film layer 4a does not follow the curved surface of the skin, and thus there is a possibility that the skin masking material 2a is peeled off from the skin in a short time after being applied to the skin. On the other hand, if the pressure exceeds 5 MPa, after the skin masking material 2a is pasted, the user feels the skin tight, and the user feels uncomfortable.

The value of the tensile modulus of the film is measured by the following method.
(1) Measurement is performed at 35 ° C. in a nitrogen atmosphere. An initial load of 1 mN is applied to the sample film for 10 minutes to keep the sample temperature in equilibrium with the ambient temperature.
(2) The sample is stretched at a tensile speed of 100 mm / min until the load reaches 30 kPa.
(3) The sample is creeped with a load of 30 kPa.
(4) The sample length (distance between chucks) when an initial load of 1 mN is applied for 10 minutes is L0, and the sample length when the load reaches 30 kPa is L30. Then, the value of E is obtained using the following mathematical formula.
E = W × L0 / (L30-L0)
Here, the value of W is 30 kPa. The value E calculated from the above mathematical formula is taken as the value of the tensile elastic modulus.

  Examples of the material of the film layer 4a include a urethane resin film, a vinyl acetate film, an acrylic resin film, and a silicone resin film. The acrylic resin-based film contains, as a main component, an alkyl acrylate having 1 to 8 carbon atoms in the alkyl group and an alkyl methacrylate, and a polymerizable monomer or prepolymer that can be copolymerized with these and has a hydrogen bonding ability. The film which consists of a copolymer containing 0-20 mol% of units is mentioned. Examples of the acrylic resin film include hydroxyalkyl acrylates such as hydroxyethyl acrylate (HEA) and acrylamides having a hydroxyl group such as hydroxyethyl acrylamide (HEAA).

Here, methyl methacrylate is exemplified as the alkyl methacrylate. Furthermore, an ethyl acrylate is illustrated as an alkyl acrylate here. The molar ratio of methyl methacrylate to ethyl acrylate is, for example, 40:90 to 40: 180. The acrylic resin film obtained by copolymerizing these has a moisture permeability of 900 to 1,300 g / (m ² · day) when the surface is smooth and the thickness is 30 μm.

Alternatively, the alkyl acrylate is exemplified by butyl acrylate. The molar ratio of methyl methacrylate to butyl acrylate is, for example, 10:16 to 10:25. When the acrylic resin film obtained by copolymerizing these has a smooth surface and a thickness of 30 μm, the moisture permeability is about 900 g / (m ² · day).

  Examples of the material for the pressure-sensitive adhesive layer 6a include pressure-sensitive adhesives selected from the group consisting of acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, and mixtures thereof. In addition, acrylic adhesives, silicone adhesives, and urethane adhesives have higher moisture permeability than rubber adhesives, and therefore consist of acrylic adhesives, silicone adhesives, urethane adhesives, and mixtures thereof. It is preferable to obtain a skin masking material 2a having high moisture permeability by using an adhesive selected from the group as a material for the adhesive layer 6a.

  The material of the pressure-sensitive adhesive layer 6a is more preferably an acrylic pressure-sensitive adhesive. When an acrylic pressure-sensitive adhesive is used, the moisture permeability of the pressure-sensitive adhesive layer 6a can be adjusted by a combination of monomers. For example, when a copolymer of monomers selected from the group consisting of hydroxyethyl acrylamide (HEAA), alkoxyalkyl acrylate, vinyl acetate (VA), and a mixture thereof is used as a raw material for the adhesive, the adhesive layer 6a is High moisture permeability. Moreover, when an acrylic adhesive is used, the adhesive layer 6a can be made into a gel form. When the pressure-sensitive adhesive layer 6a is in a gel form, keratin damage can be suppressed when the skin masking material 2a is applied to the skin or peeled off from the skin. Since the acrylic pressure-sensitive adhesive is a high molecular weight substance and has adhesiveness, when the acrylic pressure-sensitive adhesive is used, the pressure-sensitive adhesive layer 6a hardly contains a low molecular weight additive having a molecular weight of 1,000 or less that can cause allergies. .

  The thickness of the pressure-sensitive adhesive layer 6a is preferably 10 to 30 μm. When the thickness is less than 10 μm, the skin masking material 2a does not have a predetermined adhesive force with respect to the skin depending on the type of the adhesive used as the material of the adhesive layer 6a. If the thickness exceeds 30 μm, not only the skin masking material 2a may stick to the edges of the adhesive layer 6a after the skin masking material 2a is applied, but the skin masking material 2a may be caught on fingers or clothes. It can cause peeling. Moreover, when it exceeds 30 micrometers, it is difficult to give sufficient moisture permeability to the adhesive layer 6a depending on the kind of adhesive used as a raw material.

  The pressure-sensitive adhesive strength of the pressure-sensitive adhesive layer 6a is a value measured by 180-degree peeling according to the peel strength test method of the adhesive in accordance with JIS K 6854-2, and the pressure-sensitive adhesive strength on the SUS plate of the skin masking material 2 is 0. It is preferable that it is 1-10 (N / 25mm). If the adhesive strength is less than 0.1 N / 25 mm, the adhesive strength is too weak, so that the skin masking material 2a may peel from the skin in a short time. If the adhesive strength exceeds 10 N / 25 mm, the adhesive strength is too strong. Therefore, when the skin masking material 2a is peeled from the skin, the skin may be stimulated and the keratin may be damaged.

  The ten-point average roughness Rz of the other surface 10a of the film layer 4a is 1 of d when the average particle diameter of the powder contained in cosmetics such as foundation and concealer applied to the other surface 10a of the film layer 4a is d. ˜60 times, that is, d ≦ Rz ≦ 60d. Further, Rz of the other surface 10 is w or less, that is, Rz ≦ w, where w is the thickness of the film layer 4a. The Rz of the other surface 10a is determined by measuring the surface shape of the other surface 10a using a surface roughness measuring machine under the conditions of a reference length of 500 μm and a cutoff value of 200 μm in accordance with JIS B 0601: 2001. This is the value obtained.

  The average particle size d of the powder contained in the cosmetic is measured by a particle size analysis / laser diffraction method based on JIS Z 8825-1: 2001, and is a particle size having a cumulative value of 50% in a volume-based particle distribution, The median diameter.

  The average particle diameter d of the particles contained in cosmetics such as foundations and concealers has a width of about 0.1 μm ≦ d ≦ 60 μm. On the other hand, Rz of the other surface 10a is 1 to 60 times d. Since the Rz of the other surface 10a is larger than the average particle diameter d, most of the powder contained in the cosmetic enters the concave portion of the concave and convex portions formed on the other surface 10a and is held in the concave portion. When cosmetics are applied to the other surface 10a, the powder is pushed into the recess, and the film layer 4a has elasticity, so the recess expands and contracts according to the shape of the powder, and the Rz of the other surface 10a is 1 times d. Or even if it is a magnitude | size close to 1 time, it is thought that many powders enter and hold | maintain in a recessed part. Furthermore, since Rz of the other surface 10a is 60 times or less the average particle diameter d, the user can wipe off the powder that has entered the recess. Since the user can adjust the amount of the cosmetic applied to the other surface 10a, the user can finely adjust the color of the other surface 10a to match the skin color while avoiding thick makeup.

  Since the height difference of the unevenness formed on the other surface 10a of the film layer 4a does not exceed the thickness w of the film layer 4a, Rz of the other surface 10a is w or less. Even in a state where Rz = w, that is, a recess formed in the other surface 10a is a through-hole penetrating the film layer 4a, and the adhesive layer 6a is exposed at the bottom of the through-hole, it is also included in the cosmetic. The powder can be held on the other surface 10a.

  Due to the above-described configuration and action, when a part that appears to be abnormal in appearance is generated on the skin, the skin masking material 2a is affixed to the skin to conceal the part, and is applied to the surface of the affixed skin masking material 2a. Furthermore, when applying cosmetics, the makeup paste is good.

  Conventionally, a urethane film having a surface embossed has been produced, and the surface properties thereof are an arithmetic average roughness Ra of less than 0.3 μm and an Rz of about 1 μm or less. Even if a powder having an average particle diameter d in the range of 2 to 60 μm is applied to the surface of a conventional urethane film, the powder slides down the film surface.

  On the other hand, in the skin masking material 2a, since Rz of the other surface 10a is d ≦ Rz ≦ 60d, even when the average particle diameter d of the powder contained in the cosmetic is in the range of 2 to 60 μm Is good. The Rz of the other surface 10a is 2 μm ≦ Rz ≦ 120 μm and Rz ≦ w when d is 2 μm. When d is 6 μm, 6 μm ≦ Rz ≦ 360 μm and Rz ≦ w. When d is 60 μm, 60 μm ≦ Rz ≦ 3,600 μm and Rz ≦ w.

[Embodiment 2]
The same numerals shown in each figure in this specification show the same or similar member. With respect to the skin masking material 2b according to the second embodiment shown in FIG. Rz of the other surface 10b of the skin masking material 2b is 6 μm ≦ Rz ≦ 40 μm and Rz ≦ w.

  Compared with the conventional skin masking material, the skin masking material 2b has a large level difference of the unevenness | corrugation formed in the other surface 10b, and the powder contained in cosmetics is easy to be hold | maintained in a recessed part. Furthermore, since the skin masking material 2b has an Rz of the other surface 10b of Rz ≦ 40 μm, the height difference of the unevenness is not too large, and the powder held in the recesses is particularly easy to wipe off. Since the user can easily correct the makeup, it is not necessary to carefully adjust the hue.

  Rz of the other surface 10b is preferably 10 μm ≦ Rz ≦ 40 μm and Rz ≦ w. When a plurality of types of cosmetics such as concealer and foundation are applied to the other surface 10b, a plurality of types of powders having different average particle diameters d are held in the recesses of the unevenness formed on the other surface 10b. Compared to the case of 6 μm ≦ Rz <10 μm, if 10 μm ≦ Rz ≦ 40 μm, the difference in height of the unevenness is sufficiently large, so that the foundation powder applied on the concealer powder is sufficiently retained.

  Rz of the other surface 10 is more preferably 17 μm ≦ Rz ≦ 35 μm and Rz ≦ w. Compared to the case of 10 μm ≦ Rz <17 μm, when 17 μm ≦ Rz ≦ 35 μm, a large amount of powder can be held in the irregularities, and therefore, makeup paste is particularly good when a plurality of types of cosmetics are applied. In addition, compared with the case of 35 μm <Rz ≦ 40 μm, when 17 μm ≦ Rz ≦ 35 μm, the size of the unevenness of the unevenness is close to the unevenness of the unevenness on the surface of the skin. The cosmetic can be wiped off from the other surface 10b with a feeling close to that when the cosmetic is wiped off from the other side 10b.

  It should be noted that the skin masking material 2b also has a makeup paste when the Rz of the other surface 10b is d ≦ Rz ≦ 60d with respect to the average particle diameter d of the powder contained in the cosmetic applied to the other surface 10b. Good effect is demonstrated. When the Rz of the other surface 10b is 6 μm ≦ Rz ≦ 40 μm and Rz ≦ w, the maximum range of the average particle diameter d of the powder that exhibits a good effect of the cosmetic paste is 0.1 μm ≦ d ≦ 40 μm and d ≦ w. When the Rz of the other surface 10b is 6 μm ≦ Rz ≦ 40 μm and Rz ≦ w, the maximum range of the average particle diameter d of the powder exhibiting a good effect of cosmetic paste is about 0.17 μm ≦ d ≦ 40 μm and d ≦ w. When the Rz of the other surface 10b is 17 μm ≦ Rz ≦ 35 μm and Rz ≦ w, the maximum range of the average particle diameter d of the powder exhibiting a good effect of cosmetic paste is about 0.28 μm ≦ d ≦ 35 μm and d ≦ w.

  When the other surface (10a, 10b) is d, and the thickness of the film layer 4a is w, the average particle diameter of the powder contained in cosmetics such as concealer and foundation applied to the other surface (10a, 10b), Arithmetic mean roughness Ra defined in accordance with JIS B 0601: 2001 for the other surface (10a, 10b) is 0.15d ≦ Ra ≦ 3d and Ra ≦ (w / 2). preferable. Specifically, when d is 2 μm, 0.3 μm ≦ Ra ≦ 6 μm and Ra ≦ (w / 2). When d is 6 μm, 0.9 μm ≦ Ra ≦ 18 μm and Ra ≦ (w / 2). If the other surface (10a, 10b) has such a surface property, it is suitable for holding the powder contained in the cosmetic.

  Of the irregularities formed on the other surface (10a, 10b), the concave portion is a substantially cylindrical hole shape, a substantially prismatic hole shape, a substantially mortar-shaped hole shape, a groove shape, and a mixture of these shapes. It may be a shape selected from the group consisting of shapes. The depth of the concave portion formed on the other surface (10a, 10b) and the height of the convex portion may be different for each concave portion or each convex portion. By arranging a number of concave portions and convex portions, adjusting the depth of the concave portions and the height of the convex portions, the concave and convex portions are provided so as to form a geometric pattern on the other surface (10a, 10b). Also good. If such unevenness is formed on the other surface (10a, 10b), the incident light to the film layer 4a is refracted by the unevenness or diffused by diffuse reflection as compared with a smooth case. The masking properties of the masking materials (2a, 2b) are high. For the same reason, if Rz on the other surface (10a, 10b) is large, the total light transmittance of the film layer 4a is low, and the masking property of the skin masking material (2a, 2b) is high.

  When the recessed part formed in other surface (10a, 10b) is a hole shape, it is preferable that the diameter of a hole is 3-35 micrometers. Moreover, when a recessed part is groove shape, it is preferable that the width | variety of a groove | channel is 5-35 micrometers. With such a hole diameter and groove width, incident light is refracted and diffused, so the masking properties of the skin masking material (2a, 2b) are high, and there are multiple types on the other surface (10a, 10b). Makeup paste is good when applying cosmetic powder.

  The uneven shape formed on the other surface (10a, 10b) is preferably a shape similar to the uneven shape provided on the surface of natural leather or artificial leather. With such a shape, the masking property of the skin masking material (2a, 2b) is high, the paste on the other side (10a, 10b) is good, and the skin masking material (2a, 2b) is applied after the cosmetic is applied. The difference in appearance between the coated part and the uncoated skin part is small.

[Method for producing skin masking material]
A resin solution is cast and dried on the surface of a cast peelable substrate having an inverted pattern, and the dried product is peeled off from the substrate to obtain a film M as a material of the film layer 4a. On the other surface (transfer surface) of the film M, the inverted pattern is transferred to form irregularities.

  When an acrylic adhesive is used as the material for the adhesive layer 6a, the monomers that are the raw materials for the adhesive are mixed and dissolved in ethyl acetate, added with a polymerization initiator, copolymerized, and then added with a crosslinking agent. To prepare a casting solution. Moreover, when using a silicone type adhesive for the raw material of the adhesive layer 6a, the solution for casting is prepared using the commercially available silicone type adhesive which is the system etc. which mix a predetermined two types of solution. When a rubber adhesive is used as the material for the adhesive layer 6a, the polymer that is the raw material of the adhesive is mixed and dissolved in toluene, a softener, a tackifier, and an antioxidant are added, and a casting solution is prepared. Prepare. When a urethane-based adhesive is used as the material for the adhesive layer 6a, a predetermined two types of solutions are mixed immediately before casting to prepare a casting solution. Furthermore, when using any of acrylic, silicone, rubber or urethane adhesives, cast the casting solution onto a release sheet and dry or heat the cast. The adhesive sheet N used as the raw material of the adhesive layer 6a is obtained.

  One surface of the film M (the surface that is not the transfer surface) is placed on and bonded to the surface of the pressure-sensitive adhesive sheet N that does not have a release sheet to obtain a laminate of M, N, and the release sheet. When this laminate is punched into a predetermined shape from the other side (transfer surface) side of M with a blade shape, the skin contact surface 16 of the skin masking material (2a, 2b) is covered with a piece of release sheet (release paper) The obtained form is obtained.

  The skin masking material (2a, 2b) is distributed as a product in a form in which the skin contact surface 16 is covered with release paper, and the release paper is peeled off immediately before being attached to the skin by the user. In manufacturing the skin masking material (2a, 2b), for example, by using a substrate that has been processed by changing the concave and convex shape of the inverted pattern, the other surface (10a, 10b) of the skin masking material (2a, 2b) is used. The formed uneven shape can be adjusted.

[Light transmittance of film layer]
The skin masking material (2a, 2b) is the total light transmission of the film layer 4a obtained by measuring with an integrating sphere light transmittance measuring device in the plastic optical property test method in accordance with JIS K 7105: 1981. It is preferable that fine particles are contained in the film layer 4a so that the rate is 75 to 90%. Further, the skin masking material (2a, 2b) is a parallel of the film layer 4a obtained by measuring using an integrating sphere light transmittance measuring device in the plastic optical property test method in accordance with JIS K 7105: 1981. The light transmittance is 0 to 12% and the haze (cloudiness value) of the film layer 4a is 84 to 100% so that the film layer 4a contains fine particles dispersed therein. good.

  When the total light transmittance of the film layer 4a is 75 to 90%, a part of the incident light to the film layer 4a is absorbed by the fine particles. When the parallel light transmittance of the film layer 4a is 0 to 12% and the haze (cloudiness value) of the film layer 4a is 84 to 100%, most of the incident light to the film layer 4a is the film. It diffuses by irregular reflection on the surface of the fine particles dispersed in the layer 4a. Due to these actions, when the skin masking material (2a, 2b) is affixed to a different part of the skin, the extraneous part is not visible through the skin masking material (2a, 2b). You can hide and hide. Furthermore, no shine occurs on the other side (10a, 10b). In this case, the skin masking materials (2a, 2b) are preferable in terms of appearance because the difference from other parts of the skin is difficult to understand when cosmetics are further applied thereon.

  If the total light transmittance of the film layer 4a exceeds 90%, the part to be concealed will be seen through the skin masking material (2a, 2b). Even when the parallel light transmittance of the film layer 4a exceeds 12% or when the haze (cloudiness value) of the film layer 4a is less than 84%, the portion to be concealed can be seen through. Further, if the total light transmittance of the film layer 4a is less than 75%, the skin masking material (2a, 2b) is hardly reflected in the portion where the skin masking material (2a, 2b) is applied. The appearance does not fit into the surrounding skin. After the foundation is further applied from above the skin masking material (2a, 2b), the part where the skin masking material (2a, 2b) is applied to the surrounding skin becomes unnatural and becomes conspicuous.

  The particle size p of the fine particles contained in the film layer 4a is preferably 10 nm ≦ p ≦ 20 μm and p ≦ (w / 2). The content of the fine particles is such that when the film as the material of the film layer 4a is produced, the total light transmittance is 75 to 90% and the parallel light transmittance is 0% to 12% with respect to the film itself as the material. In addition, the haze (cloudiness value) is preferably adjusted to 84 to 100%. The content of the fine particles is preferably 0.05 to 30% by weight with respect to the film weight.

  The substances constituting the fine particles include pearl pigments, talc, mica, silica, kaolin, clay, mica powder, quartz powder, diatomaceous earth, montmorillonite, vermiculite, amorphous silica, silica-alumina, carbon black, ferrite, graphite, Examples thereof include resin powders, oxalates such as calcium, magnesium, aluminum, lithium, barium, and titanium, sulfates, carbonates, phosphates, aluminates, and metal oxides. These fine particles absorb the light incident on the film layer 4a or diffuse it by irregular reflection. These fine particles are substances that are not harmful to the skin and the like. The fine particles are preferably made of a chemically stable substance.

  The film used as the material of the film layer 4a has a total light transmittance of 75 to 90% because the unevenness formed on the other surface (10a, 10b) refracts incident light on the film in addition to the action of fine particles. The parallel light transmittance is 0 to 12%, and the haze (cloudiness value) is 84 to 100%. In this case, when the film that is the material of the film layer 4a is viewed from behind the film through the film, if the object is within a distance of about 1 cm from the film, the shape and brightness of the object Although it can be recognized, it can exhibit transparency such that the shape, brightness, etc. of an object farther than about 1 cm from the film cannot be recognized.

  The film used as the material of the film layer 4a may be a film to which a dye or pigment is added in addition to the fine particles. By adjusting the addition amount of the dye or pigment, the color tone of the film layer 4a can be adjusted so as to easily match the hue of the skin. With this adjustment, when the skin masking material (2a, 2b) is applied to the skin and cosmetics are further applied, the applied color is corrected by makeup so that the applied site cannot be distinguished from other parts of the skin. Can be reduced.

[Water permeability of skin masking material]
The moisture permeability of the skin masking material (2a, 2b) is preferably 400 g / (m ² · day) or more. Since water vapor of about 300 g / (m ² · day) radiates from the surface of the skin on a daily basis, if a film with low moisture permeability is applied to the skin, the skin may become stuffy and normal bacteria on the skin may grow and cause inflammation There is. On the other hand, when the moisture permeability of the skin masking material (2a, 2b) is 400 g / (m ² · day) or more, the water vapor emitted from the skin surface passes through the skin masking material (2a, 2b). In this case, when the skin masking material (2a, 2b) is affixed to the skin, it is possible to avoid stuffiness of the skin and skin damage that may occur due to stuffiness.

The moisture permeability of the skin masking material (2a, 2b) is more preferably 900 to 5,000 g / (m ² · day). When the moisture permeability is 900 g / (m ² · day) or more, when the skin masking material (2a, 2b) is affixed, the feeling of stuffy skin can be almost eliminated. When the moisture permeability is 5,000 g / (m ² · day) or less, the skin masking material (2a, 2b) swells when water, sweat or alcohol is absorbed by the skin masking material (2a, 2b). It can be avoided that it stretches easily and exfoliates easily. Furthermore, when the moisture permeability is 900 to 5,000 g / (m ² · day), when the skin masking material (2a, 2b) is affixed to the wound, the wound surface is maintained in a moist state, and the wound is created by wet therapy. Can be treated quickly. The moisture permeability of the skin masking material (2a, 2b) is more preferably 1,000 to 3,000 g / (m ² · day).

The moisture permeability of the skin masking material (2a, 2b) is affected by the material, shape and thickness of the film layer 4a. As a material of the film layer 4a, it is preferable to use a film having a moisture permeability of 1,000 g / (m ² · day) or more when the thickness is 30 μm. When a material with high moisture permeability is used for the film layer 4a, even when the thickness w of the film layer 4a is increased, the feeling of stuffy skin can be almost eliminated when the skin masking material (2a, 2b) is applied. .

  The moisture permeability of the skin masking material (2a, 2b) is also affected by the size of Rz on the other surface (10a, 10b). If the skin masking material (2a, 2b) uses a film in which many deep micropores are formed on the other surface (10a, 10b) as a material, the film layer 4a exhibits high moisture permeability. Further, in the skin masking material (2a, 2b), the ratio of the unevenness formed on the other surface (10a, 10b) to the thickness w of the film layer 4a may be very large. is there. In this case, even if a film with low moisture permeability is used as the material of the film layer 4a or a thick film is used, the film layer 4a can exhibit high moisture permeability.

  The skin masking material (2a, 2b) has a particularly high permeability when the distance from the bottom of the concave portion of the unevenness formed on the other surface (10a, 10b) to the one surface 12 of the film layer 4a is 30 μm or less. Can indicate humidity. That is, when the thickness w of the film layer 4a is 0 μm <w ≦ 30 μm, the moisture permeability is particularly high regardless of the value of Rz. Further, when 30 μm <w, a particularly high moisture permeability can be exhibited if (w−30 μm) <Rz ≦ w.

  The moisture permeability of the film layer 4a is measured by a cup method based on JIS Z 0208. In the measurement, calcium chloride is used as the hygroscopic agent, and paraffin having a melting point of 52 to 54 ° C. that is commercially available as a reagent is used as the sealant. In the measurement, the cup containing the hygroscopic agent is placed in a constant temperature and humidity chamber having a temperature of 40 ° C. and a humidity of 90% RH, and the weight of the entire cup is measured three times every 1.5 hours from the start of measurement. The value of moisture permeability is obtained from the average value of the second and third measurements.

[Organic compounds having polar groups that are liquid at room temperature]
The pressure-sensitive adhesive layer 6a preferably contains 10 to 50% by weight of an organic compound having a polar group that is liquid at room temperature. The normal temperature here is 5 to 35 ° C. If the organic compound having a polar group, which is liquid at room temperature, is less than 10% by weight with respect to the pressure-sensitive adhesive layer 6a, the pressure-sensitive adhesive layer 6a does not become a gel depending on the composition of the pressure-sensitive adhesive. Moreover, when it exceeds 50 weight% with respect to the adhesive layer 6a, depending on a composition of an adhesive, a gel body may not be formed with the adhesive layer 6a, and there exists a possibility that the adhesive force of the adhesive layer 6a may become inadequate.

  Here, the polar group is a functional group having polarity such as an amide group, amino group, aldehyde group, ether group, ester group, carboxyl group, keto group, sulfo group, hydroxyl group, and phosphoric acid group. Organic compounds having polar groups that are liquid at room temperature include fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbit fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil, glycerin. Selected from the group consisting of fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, fatty acids, aliphatic alcohols, phospholipids, polyhydric alcohols such as 1,3-butylene glycol, glycerin, polyethylene glycol, and mixtures thereof. And organic compounds.

When the pressure-sensitive adhesive layer 6a contains 10 to 50% by weight of an organic compound having a polar group that is liquid at room temperature, the pressure-sensitive adhesive layer 6a becomes a gel, so that the skin masking material (2a, 2b) Relieve stress caused by expansion and contraction. Moreover, since the organic compound is a hydrophilic substance or a highly polar substance, the skin masking material (2a, 2b) exhibits high moisture permeability through the adhesive layer 6a. For this reason, skin masking material (2a, 2b) suppresses a rash in the skin of the site | part to which skin masking material (2a, 2b) was affixed, or makes it difficult for a user to feel uncomfortable. In addition, when the skin masking material (2a, 2b) is peeled from the skin, irritation to the skin is reduced to prevent keratin damage. When the pressure-sensitive adhesive layer 6a is in the form of gel and the moisture permeability of the skin masking material (2a, 2b) is 900 to 5,000 g / (m ² · day), the skin masking material (2a, 2b) is used as a wound, etc. When affixed to a foreign part, the extraneous part is maintained in a wet state, and early healing of the foreign part is observed.

  The organic compound contained in the pressure-sensitive adhesive layer 6a may be a hydrocarbon compound selected from the group consisting of hydrocarbon compounds such as squalane, squalene, polybutene, polyisobutylene, and mixtures thereof. One or more types of surfactant may be sufficient as the organic compound contained in the adhesive layer 6a.

  Conventionally, ointments and creams for the treatment of acne have been marketed in order to treat different parts of the skin such as acne, wounds and scars. However, it has been considered to avoid applying an ointment or the like to an extraordinary portion and covering it with a cosmetic. Similarly, it has also been considered unpreferable to apply a patch to acne or pimples. The reason for this is thought to be that the secretory gland is blocked by an ointment or a patch, and the bacteria may grow in a foreign part.

  For this reason, conventionally, in the case where an abnormal part occurs in the skin, it is difficult to simultaneously cover the difference between the skin and other parts of the skin so that the difference from the other part of the skin is difficult to understand. was difficult. There was a need to choose between either covering first or treating first. Those who care about their appearance were forced to inconvenience.

[Medicinal ingredients for skin]
On the other hand, the adhesive layer 6a may contain a medicinal component for the skin. With this configuration, when the skin masking material (2a, 2b) is applied to a foreign part of the skin, the part can be recovered and healed. For example, if the medicinal component has a function of dissolving sebum etc. that closes the secretory glands and sweat glands and has an antibacterial effect, if the skin masking material (2a, 2b) is applied to the skin disease part such as acne or pimple, Can be treated while hiding the part. Even when the medicinal component is solid at normal temperature, if the pressure-sensitive adhesive layer 6a contains a fatty acid ester or the like, the medicinal component can be dissolved in the fatty acid ester or the like to exert the above-described therapeutic effect.

  Therefore, when the adhesive layer 6a contains a medicinal component for the skin, the skin masking material (2a, 2b) is applied to a different part of the skin such as acne, pimple, wound, etc. This can not only make the difference difficult to understand, but at the same time, it can be used to treat heterogeneous parts.

  In order to include the medicinal component in the adhesive layer 6a, the medicinal component is added to and mixed with the cast solution before casting in the above-described method for producing the skin masking material (2a, 2b), and the cast solution after mixing Is cast on a release sheet. About others, when the method similar to the manufacturing method of the above-mentioned skin masking material (2a, 2b) is taken, the skin masking material (2a, 2b) containing the medicinal component in the adhesive layer 6a can be obtained.

[Α-hydroxy acids, salicylic acid]
Examples of the medicinal component include compounds selected from the group consisting of α-hydroxy acids, salicylic acid, and mixtures thereof. Examples of α-hydroxy acids include lactic acid, citric acid, glycolic acid, malic acid, succinic acid and the like. Since these components have effects such as keratin softening and pore expansion, the skin masking material (2a, 2b) can be used for the treatment of skin diseases when included in the adhesive layer 6a. Moreover, since these components are acidic, when used for the treatment of skin wounds, the growth of skin resident bacteria can be suppressed to improve wound healing. α-Hydroxy acids and salicylic acid are preferably added in an amount of 0.1 to 10% by weight with respect to the pressure-sensitive adhesive layer 6a.

[Antimicrobial agent]
An antibacterial agent is mentioned as a medicinal component. The antibacterial agent is preferably added so as to be 0.01 to 20% by weight with respect to the pressure-sensitive adhesive layer 6a. With this configuration, the antibacterial action and the bactericidal action are exhibited at the site where the skin masking material (2a, 2b) is affixed, and the growth of bacteria is suppressed. More preferably, an antibacterial agent is added so that it may become 0.05 to 5 weight% with respect to the adhesive layer 6a.

  Examples of the antibacterial agent include compounds selected from the group consisting of isopropylmethylphenol, silver-based antibacterial agents, and mixtures thereof. Isopropylmethylphenol is 3-methyl-4-isopropylphenol. Examples of the silver-based antibacterial agent include compounds selected from the group consisting of silver colloids, silver inclusions such as silver zeolite, silver-based compounds, and mixtures thereof. These antibacterial agents exhibit high antibacterial properties and safety, have almost no skin irritation, and can be used as additives for quasi drugs and cosmetics. When these antibacterial agents are included in the pressure-sensitive adhesive layer 6a, the skin masking material (2a, 2b) can be easily used in various scenes of daily life.

  Antibacterial agents include kanamycin sulfate, gentamicin sulfate, fradiomycin sulfate, erythromycin, tetracycline hydrochloride, oxytetracycline hydrochloride, demethylchlortetracycline hydrochloride, chloramphenicol, bacitracin, sodium fusidate, sulfadiazine Examples thereof include compounds selected from the group consisting of antibacterial agents such as silver and mixtures thereof. These antibacterial agents are conventionally used in pharmaceuticals in the form of ointments, patches and the like. When these antibacterial agents are included in the pressure-sensitive adhesive layer 6a, the skin masking material (2a, 2b) can be used as a pharmaceutical product for the skin.

[Anti-inflammatory drugs]
Examples of medicinal ingredients include anti-inflammatory drugs. Anti-inflammatory drugs include indomethacin, piroxicam, felbinac, loxoprofen sodium, diclofenac sodium, ketoprofen, flurbiprofen, ibuprofen piconol, ibuprofen, flufenamic acid, suprofen, bufexamac, bendazac, ufenamate, glycyrrhizic acid or its derivatives Non-steroidal anti-inflammatory analgesics and compounds selected from the group consisting of mixtures thereof. In particular, the combination of the anti-inflammatory drug ibuprofen piconol and the antibacterial agent isopropylmethylphenol is preferred.

[Other medicinal ingredients for skin]
Other medicinal ingredients include sodium cromoglycate, tranilast, ketotifen fumarate, azelastine hydrochloride, oxatomide, mequitazine, fexofenadine hydrochloride, epinastine hydrochloride, ebastine, cetirizine hydrochloride, bepotastine besylate, Examples include compounds selected from the group consisting of antiallergic drugs such as olopatadine hydrochloride, loratadine and suplatast tosylate, and mixtures thereof. Medicinal ingredients include azulene, sulfadiazine, alcloxa, lysozyme hydrochloride, tretinoin tocopheryl, bucladecin sodium, alprostadil alphadex, trafermin (genetical recombination), and a mixture of these Examples include compounds selected from the group. These pharmaceuticals are conventionally used as dermatological agents.

  The medicinal properties include antipruritic drugs such as crotamiton, atopic dermatitis drugs such as tacrolimus hydrate, vitiligo drugs such as methoxalene, pregnanediol, nadifloxacin, clindamycin phosphate, adapalene and other acne treatments Drugs, etretinate, tacalcitol hydrate, calcipotriol, maxacalcitol, vitamin A, urea, cyclosporine and other keratosis / psoriasis treatments, salicylic acid and other emollients, carpronium chloride, finasteride and other hair loss treatments Group consisting of drugs, therapeutic drugs for leprosy such as diphenylsulfone, clofazimine, rifampicin, ofloxacin, blood circulation promoting / skin moisturizers such as heparin sodium and heparin-like substances, dermatological agents such as white petrolatum, imiquimod, and mixtures thereof More selected compounds And the like. These pharmaceuticals are conventionally used as dermatological agents.

  Examples of the medicinal component include compounds selected from the group consisting of vitamin C and derivatives thereof, vitamin E and derivatives thereof, peony extract, toki extract, sicon extract, sulfur, nordihydroguaiaretic acid, and mixtures thereof. Examples of the medicinal component include sulfate polysaccharides such as hyaluronic acid, polyhydric alcohols such as glycerin, butylene glycol, polyethylene glycol, and the like, which are considered to have a moisturizing effect, and compounds selected from the group consisting of these. . The medicinal component may contain one or more medicinal plant extracts.

  The medicinal ingredients include hair-growth agents, blood circulation promoters, stimulants, hormones, anti-wrinkle agents, anti-aging agents, squeeze agents, cooling sensation agents, warming sensation agents, wound treatment promoters, stimulation mitigation agents, cell activators, It may be a plant / animal / microbe extract, antipruritic agent, exfoliating / dissolving agent, antiperspirant, refreshing agent, astringent and the like. The medicinal component may contain one or more active pharmaceutical ingredients such as thymol, for example.

  The pressure-sensitive adhesive layer 6a may contain a disinfectant. As the disinfectant, a compound selected from the group consisting of iodine substances such as ethanol, isopropanol, povidone iodine, benzethonium chloride, benzalkonium chloride, chlorhexidine gluconate, alkyldiaminoethylglycine, and mixtures thereof. Can be mentioned. These disinfectants are conventionally used for disinfecting fingers and skin.

  The pressure-sensitive adhesive layer 6a may contain a compound selected from the group consisting of antioxidants such as dibutylhydroxytoluene and butylhydroxyanisole, and mixtures thereof.

[Polyether polyurethane or polyester polyurethane]
The material of the film layer 4a is preferably a polyether polyurethane (EU) or polyester polyurethane film. With this configuration, the film layer 4a has high stretchability and high moisture permeability. In this case, the skin masking material (2a, 2b) fits the skin when applied. Moreover, when cosmetics such as a foundation and a concealer are further applied from above, the powder held in the recesses formed on the other surface (10a, 10b) is moistened with water vapor emanating from the skin surface, and its viscosity increases. For this reason, it becomes easier to hold | maintain powder in a recessed part. The polyether polyurethane (EU) or polyester polyurethane film has a moisture permeability of 950 g / (m ² · day) or more when the surface is smooth and the thickness is 30 μm. Moreover, since polyether polyurethane (EU) and polyester polyurethane are materials having polar groups, the other surfaces (10a, 10b) can be colored with a water-soluble dye.

[Thickness of film layer]
The thickness w of the film layer 4a is preferably 6 μm ≦ w ≦ 100 μm. When w is less than 6 μm, the strength of the film layer 4a is insufficient. When w exceeds 100 μm, the tensile elastic modulus of the film layer 4a becomes excessive, and the skin masking materials (2a, 2b) do not fit the curved surface of the skin. Moreover, since the skin masking material (2a, 2b) does not follow the expansion and contraction of the skin, the user may feel uncomfortable.

The thickness w of the film layer 4a is more preferably 10 μm ≦ w ≦ 60 μm. Since recesses are formed on the other surfaces (10a, 10b), if w is 6 μm ≦ w <10 μm, the strength of the film layer 4a may not be sufficient. Also, if w is 60 μm <w ≦ 100 μm, depending on the film used as the material of the film layer 4a, the moisture permeability of the skin masking material (2a, 2b) does not exceed 900 g / (m ² · day). There is a risk that the person may feel skin stuffiness.

[Other Embodiments]
With respect to the skin masking material (2f, 2g, 2h, 2i, 2j) according to other embodiments shown in FIGS. 2 to 5, the configuration and operational effects different from those of the skin masking material (2a, 2b) will be described.

  The skin masking material 2 f shown in FIG. 2 is a composite film 38 in which the material of the film layer 4 f is a laminate of an uneven urethane film 34 and a hydrophobic film 36. Examples of the material of the hydrophobic film 36 include hydrophobic synthetic resins selected from the group consisting of polyolefin resins, thermoplastic elastomers, rubber resins, and mixtures thereof. Here, examples of the thermoplastic elastomer include a styrene isoprene styrene block copolymer, a styrene butadiene copolymer, and modified products thereof such as acrylic. Examples of the rubber resin include isoprene rubber, butyl rubber, polyisobutylene, and modified products thereof. The composite film 38 is formed by casting a urethane resin solution on the surface of a substrate having an uneven pattern on the surface and drying it to form a film, and further using a resin solution that is a raw material for the hydrophobic film 36. It can be obtained by peeling a laminate in which a thin film is formed on a film from a substrate.

  In the film layer 4f, the other surface 10f side is a urethane film 34 having irregularities formed by transferring an inverted pattern on the surface of the substrate, and one surface 12 side thereof is a hydrophobic film 36. In the film layer 4f, the thickness v of the hydrophobic film 36 is 2 μm ≦ v ≦ 10 μm, and v <(w / 2), and Rz of the other surface 10f is Rz ≦ (w−1 μm). It is preferable that the unevenness to be formed is formed.

With this configuration, since the hydrophobic film 36 is as thin as 2 μm ≦ w ≦ 10 μm, the decrease in the water vapor transmission rate of the film layer 4f is minimized. In addition, since 2 μm ≦ v ≦ 10 μm and Rz ≦ (w−1 μm), the recess formed in the other surface 10 f may be a through-hole penetrating the urethane film 34, but is hydrophobic. It does not become a through-hole penetrating to the film 36. Between the hole bottom of the recess and one surface 12 of the film layer 4, there is a layer of the hydrophobic film 36 having a thickness of at least 1 μm. Furthermore, since the hydrophobic film 36 prevents permeation of the medicinal component, the medicinal component contained in the pressure-sensitive adhesive layer 6 a does not migrate to the urethane film 34. For this reason, in the skin masking material 2f using the composite film 38 as the material of the film layer 4f, the medicinal components are efficiently released to the skin while maintaining a moisture permeability of 400 g / (m ² · day) or more.

  The skin masking material 2g shown in FIG. 3 is a composite film 44 in which a film layer 4g is formed by laminating a film 40 having unevenness and a red film 42. The color of the concavo-convex film 40 is a color selected from the group consisting of colorless and transparent, milky white and translucent, and colors between these colors. The composite film 44 is formed by casting a resin solution, which is a raw material of the film 40 having unevenness, onto the surface of a substrate having an uneven pattern on the surface and drying, and further, the raw material of the red film 42 on the dried resin. The obtained resin solution is cast, and the dried laminate is peeled off from the substrate.

  When the composite film 44 is manufactured, pigment, titanium oxide, talc, silica, and the like are added as fine particles to the resin solution that is the raw material of the uneven film 40, and silicone oil is further added. By adding fine particles, the film 40 having irregularities becomes colorless and transparent, milky white and translucent, or a color between these colors. By adding silicone oil, the composite film 44 can be easily peeled off from the substrate. Moreover, resin with a low elastic modulus is used for the resin solution used as the raw material of the red film 42, and further fine particles are added. By using a resin having a low elastic modulus, the red film 42 becomes soft. The resin solution that is the raw material of the red film 42 is light red, but the red film 42 becomes light red by adding fine particles.

  In the film layer 4g, the other surface 10g side is a film 40 having irregularities formed by transferring an inverted pattern on the surface of the substrate, and the one surface 12 side is a red film 42.

  The configuration of the composite film 44 simulates the configuration of the human skin. That is, since the epidermis, which is the outermost layer of the skin, does not have capillaries, it is colorless and transparent, milky white and translucent, or a color between these colors. The unevenness formed in the stratum corneum of the epidermis refracts incident light on the skin or diffuses it by irregular reflection. Melanin or the like in the basal layer of the epidermis absorbs light incident on the skin. Furthermore, the dermis inside the epidermis is light red because it has capillaries, and the proteoglycan held in the extracellular matrix is soft and soft because it contains water. By making the composite film 44 resemble the skin, when the skin masking material 2g is affixed to the skin, the appearance becomes indistinguishable from other parts of the skin, and the extraneous parts of the skin are hidden so that they are less noticeable. can do.

  The skin masking material 2h shown in FIG. 4 includes an adhesive protective part 18 that is laminated and laminated on the skin contact surface 16 of the adhesive layer 6a. Examples of the adhesive protecting portion 18 include a film such as a rigid polyethylene terephthalate, and a release paper 19 made of paper that has been subjected to silicone treatment. With this configuration, the skin contact surface 16 is protected until the adhesive protecting part 18 is peeled off immediately before the user sticks. Moreover, since the adhesive protection part 18 functions as a support body, the handling of the skin masking material 2h becomes easy at the time of manufacture or when the user carries it.

  The release paper 19 is provided with a cut 20. The pressure-sensitive adhesive protection unit 18 includes two release papers 19 divided by a cut 20. The pressure-sensitive adhesive protection unit 18 includes a folded portion 22 in which the release paper 19 is folded at the cut 20, and a knob portion 23 in which the release paper 19 is further superimposed on the folded portion 22. The user can easily peel off the release paper 19 by picking the folded portion 22 or the knob portion 23 with the fingertip.

  The skin masking material 2h includes a concavo-convex protective portion 24 that is laminated and laminated on the other surface (10a, 10b) of the film layer 4a. The unevenness protector 24 is provided with a rigid plastic film 25 and a weak adhesive layer 26 formed by thinly applying an adhesive to one side of the plastic film 25. Since the unevenness protection part 24 functions as a support during manufacture, the deformation of the laminate 14 is suppressed in the process of laminating the adhesive protection part 18 on the skin contact surface 16 to facilitate manufacture. Further, the other surface (10a, 10b) is protected until the user peels off the unevenness protecting portion 24. When sticking to the skin, it can be avoided that the laminate 14 hangs down and the skin contact surfaces 16 adhere to each other, or that the laminate 14 is stuck with wrinkles.

  The plastic film 25 and the weak pressure-sensitive adhesive layer 26 provided on the unevenness protection part 24 have a cut 28. The unevenness protector 24 is provided with two plastic films 25 and a weak adhesive layer 26 divided by a cut 28. The unevenness protector 24 is provided with a knob 29 that is superimposed on the cut 28. The knob 29 of the unevenness protector 24 includes a film 30 and an adhesive layer 31 formed by applying an adhesive to a part of one side of the film 30. The pressure-sensitive adhesive layer 31 of the knob portion 29 is laminated so as to adhere to the plastic film 25 on both sides of the cut 28. The composition and application amount of the pressure-sensitive adhesive are adjusted so that the pressure-sensitive adhesive layer 31 of the knob 29 has stronger adhesive strength than the weak pressure-sensitive adhesive layer 26. The shape of the film 30 of the knob 29, the shape of the adhesive layer 31 of the knob 29, the position where the adhesive layer 31 is laminated with the plastic film 25 on both sides of the cut 28, the film 30 of the knob 29, etc. Is not limited to that illustrated in FIG.

  Since the adhesive force of the adhesive layer 31 of the knob part 29 is stronger than the adhesive force of the weak adhesive layer 26 when the cut 28 and the knob part 29 are provided in the unevenness protecting part 24, the film 30 of the knob part 29 is removed. When pulled, the plastic film 25 and the slightly adhesive layer 26 are also pulled and deformed. Moreover, since the uneven | corrugated protection part 24 has the cut | interruption 28, air enters between the fine adhesive layer 26 and other surface (10a, 10b) from the cut 28 at the time of a deformation | transformation, and the fine adhesive layer 26 has another surface (10a, 10a, 10b). 10b). For this reason, when the skin masking material 2h is applied to the face, if the user picks the knob 29 with the fingertip, the entire unevenness protector 24 can be easily peeled off based on the sense of touch of the fingertip without the user looking at the mirror.

  The cut line 20 of the pressure-sensitive adhesive protection part 18 and the cut line 28 of the unevenness protection part 24 are provided at positions that do not overlap. For example, the cut of the adhesive protection part 18 is provided at the end of the skin contact surface 16 of the adhesive layer 6, and the cut 28 of the unevenness protection part 24 is provided at the center of the other surface 10 of the film layer 4. When the positions of the cut lines (20, 28) are different between the adhesive protecting part 18 and the unevenness protecting part 24, the skin masking material 2h is unexpectedly bent and the adhesive protecting part 18 and the unevenness protecting part 24 are prevented from being detached. be able to. Moreover, when it affixes on skin, it can avoid handling by making the direction of the other surface (10a, 10b) of the film layer 4a and the skin contact surface 16 of the adhesive layer 6a reverse.

  The skin masking material 2i shown in FIG. 5A is provided with a portion 33i where the adhesive layer 6i is not laminated at the center of the one surface 12 of the film layer 4a, and the adhesive layer 6i is laminated at the peripheral portion of the one surface 12. . For this reason, as for the skin masking material 2i, the adhesive layer 6i is laminated | stacked on at least one part of the one surface 12 of the film layer 4a. The skin masking material 2i has a high moisture permeability because there is no adhesive layer 6i at the portion 33i. In addition, since the portion 33i is present after the skin masking material 2i is applied, the film layer 4a can be prevented from turning up by the adhesive layer 6i laminated on the peripheral portion of the one surface 12. The portion 33i may be fitted with a non-sticky holding material. The holding material preferably contains a medicinal component.

  The skin masking material 2j shown in FIGS. 5 (b) and 5 (c) is provided with a portion 33j where the adhesive layer 6j is not laminated and a lattice-like adhesive layer 32 at the center of the surface 12, and the peripheral portion of the surface 12 A pressure-sensitive adhesive layer 6j is laminated on the substrate. For this reason, as for the skin masking material 2j, the adhesive layer (6j, 32) is laminated | stacked on at least one part of the one surface 12 of the film layer 4a. The skin masking material 2j can prevent the central portion of the film layer 4a from being lifted by the lattice-shaped adhesive layer 32 after being attached to the skin, in addition to the same effects as the skin masking material 2i.

  As a manufacturing method of the skin masking material (2i, 2j), for example, instead of attaching the film M to the adhesive sheet N by the above-described manufacturing method of the skin masking material (2a, 2b), an adhesive layer (6i , 6j, 32) may be screen-printed on one surface of the film M.

  The skin masking materials (2a, 2b, 2f, 2g, 2i, 2j) shown in FIGS. 1 to 3 and 5 have the adhesive protecting part 18 and the unevenness protecting part 24 like the skin masking material 2h shown in FIG. You may prepare. The skin masking materials (2a, 2b, 2f, 2g, 2h) shown in FIGS. 1 to 4 are laminated with adhesive layers (6i, 6j) like the skin masking materials (2i, 2j) shown in FIG. You may provide the part (33i, 33j) which is not performed, and the grid | lattice-like adhesive layer 32. FIG.

[Example 1]
As a peelable substrate for casting, a substrate having a surface-inverted inverted pattern of artificial leather on the surface was prepared. Rz of the surface of this substrate was 10 μm. Moreover, Leocoat U-6285M (solid content 30% by weight) (manufactured by Toray Cortex Co., Ltd.) was prepared as a urethane resin solution. As fine particles, 2.5 parts by weight of silica powder having an average particle diameter of 4 μm, 0.2 parts by weight of a red pigment, 0.15 parts by weight of titanium oxide, and 10 parts by weight of synthetic mica were prepared. A solution in which these fine particles were added and dispersed in a mixed solution of polyethylene glycol, ethyl acetate and an emulsifier was prepared, and this solution was mixed with 87 parts by weight of a urethane resin solution.

  The urethane resin solution mixed with the fine particles was cast on the surface of the substrate and dried, and the dried product was peeled from the substrate to obtain a support S. Since the solvent such as ethyl acetate is vaporized in the process of drying the urethane resin solution, substantially no solvent remains on the support S obtained after drying. The thickness of the film of the support F was 30 μm. A reverse pattern was transferred to the other surface (transfer surface) of the film of the support S, and Rz on the other surface was 10 μm. In addition, a plurality of holes having a depth of 5 to 10 μm and a diameter of 5 to 20 μm and a plurality of grooves having a depth of 5 to 25 μm and a width of 5 to 25 μm were formed on the other surface. On the other hand, one surface of the film of the support S (the surface that is not the transfer surface) was smooth because it did not contact the peelable substrate for casting.

  The main component liquid of the acrylic pressure-sensitive adhesive is 2-ethylhexyl acrylate (2-EHA), methoxyethyl acrylate (MEA), and acrylic acid (AA) in a weight ratio of 68: 25: 7 to ethyl acetate. After mixing and dissolving, 0.3 parts by weight of a polymerization initiator azobisisobutyronitrile (AIBN) was added and copolymerized at 60 to 65 ° C. to prepare a solution containing an adhesive polymer compound. In this main component liquid, the solid content of the adhesive polymer compound produced by copolymerization accounted for 40% by weight. 175 parts by weight of the main component liquid, 30 parts by weight of sorbitan monooleate, 0.07 parts by weight of dibutylhydroxytoluene (BHT) as an antioxidant, and an isocyanate-based crosslinking agent solution (solid content of about 60) for curing (Wt%) 3.5 parts by weight was added to prepare a casting solution. The casting solution was cast on a release sheet and dried to obtain an adhesive sheet T. Since the solvent such as ethyl acetate was vaporized in the process of drying the casting solution, substantially no solvent remained in the pressure-sensitive adhesive sheet T obtained after drying. The thickness of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet T was 15 μm.

  One surface of the film of the support S (the surface that is not the transfer surface) was placed on the surface of the pressure-sensitive adhesive sheet T on which the release sheet was not attached to obtain a laminate of S, T, and the release sheet. The release sheet was peeled off from the laminate and replaced with release paper provided with a cut line, a folded portion and a knob. After that, a plastic film laminated with a thin adhesive layer is applied to the other side (transfer surface) of S, and a cut is made in the plastic film and weak adhesive layer by half-cut processing so that the S film is not damaged. I put it in. Finally, a laminate of the plastic film, S, T, and release paper was punched into a 15 mm diameter circle from the side where the plastic film was applied. The resulting 15 mm diameter circular laminate was used as a skin masking material sample.

[Example 2]
When the film was prepared in Example 1, a substrate having a surface Rz of 6 μm was used as the peelable substrate for casting. About the others, the sample of the skin masking material 2 of Example 2 was prepared on the same conditions as Example 1. FIG.

  In the sample prepared in Example 2, the reverse pattern was transferred to the other surface (transfer surface) of the film, and the Rz of the other surface of the film was 6 μm. On the other surface, a plurality of holes having a depth of 3 to 7 μm and a diameter of 3 to 20 μm and a plurality of grooves having a depth of 3 to 12 μm and a width of 3 to 25 μm were formed.

[Example 3]
When the film was prepared in Example 1, a substrate having a surface Rz of 18 μm was used as the peelable substrate for casting. About the others, the sample of the skin masking material of Example 3 was prepared on the same conditions as Example 1. FIG.

  In the sample prepared in Example 3, the reverse pattern was transferred to the other surface (transfer surface) of the film. On the other side of the film, Rz was 18 μm and Ra was 9 μm. On the other surface, a plurality of holes having a depth of 5 to 18 μm and a diameter of 5 to 20 μm and a plurality of grooves having a depth of 5 to 15 μm and a width of 5 to 15 μm were formed.

[Example 4]
175 parts by weight of the main component liquid of the acrylic adhesive prepared in Example 1, 30 parts by weight of sorbitan monooleate, 0.07 parts by weight of dibutylhydroxytoluene (BHT) as an antioxidant, 2.1 parts by weight of lactic acid And 3.5 parts by weight of an isocyanate-based crosslinking agent solution (solid content: about 60% by weight) were added to prepare a casting solution. About the others, the sample of the skin masking material of Example 4 was prepared on the same conditions as Example 1. FIG.

[Example 5]
In preparing the pressure-sensitive adhesive in Example 1, the main component liquid of the acrylic pressure-sensitive adhesive was 2-ethylhexyl acrylate (2-EHA), methoxyethyl acrylate (MEA), and hydroxyethyl acrylamide (HEAA) in a weight ratio. The mixture is dissolved in ethyl acetate at a ratio of 68: 25: 7, 0.3 parts by weight of a polymerization initiator azobisisobutyronitrile (AIBN) is added, and copolymerization is performed at 60 to 65 ° C. A solution containing an adhesive polymer compound was prepared. In this main component liquid, the solid content of the adhesive polymer compound produced by copolymerization accounted for 40% by weight. 175 parts by weight of the main component liquid, 30 parts by weight of sorbitan monooleate, 0.07 parts by weight of dibutylhydroxytoluene (BHT) as an antioxidant, and an isocyanate-based crosslinking agent solution (solid content of about 60) for curing The casting solution was prepared by adding 1.4 parts by weight. The casting solution was cast on a release sheet and dried to obtain an adhesive sheet U. About the others, the sample of the skin masking material of Example 5 was prepared on the same conditions as Example 1.

[Example 6]
When the film was prepared in Example 4, a substrate having a surface Rz of 25 μm was used as the peelable substrate for casting. For this reason, in the film prepared in Example 6, the Rz of the other surface (transfer surface) was 25 μm. Moreover, when preparing the casting solution in Example 4, 2.1 parts by weight of salicylic acid was added instead of 2.1 parts by weight of lactic acid. About the others, the sample of the skin masking material of Example 6 was prepared on the same conditions as Example 4.

[Example 7]
When preparing the casting solution in Example 6, 2.1 parts by weight of glycolic acid was added instead of 2.1 parts by weight of salicylic acid, and 0.2 parts by weight of isopropylmethylphenol was further added as an antibacterial agent. About the others, the sample of the skin masking material of Example 7 was prepared on the same conditions as Example 6.

[Example 8]
When preparing the film in Example 1, a substrate having a surface Rz of 25 μm was used as the peelable substrate for casting. In the film prepared in Example 8, the Rz of the other surface (transfer surface) was 25 μm.

  The main component liquid of the acrylic resin adhesive is 2-ethylhexyl acrylate (2-EHA), vinyl acetate (VA), and hydroxyethyl acrylate (HEA) at a weight ratio of ethyl acetate of 68: 25: 7. Then, 0.3 wt% of a polymerization initiator azobisisobutyronitrile (AIBN) was added and copolymerized at 60 to 65 ° C. to prepare a solution containing an adhesive polymer compound. In this main component liquid, the solid content of the adhesive polymer compound produced by copolymerization accounted for 40% by weight. 95 parts by weight of the main component liquid was mixed with 5 parts by weight of a copolymer of butyl methacrylate, methyl methacrylate and dimethylaminoethyl methacrylate, and further ethyl acetate was added to adjust the solid content to account for 40% by weight. A solution of the composition was prepared. Into 175 parts by weight of this composition solution, 3.5 parts by weight of ibuprofen piconol as an anti-inflammatory agent, 0.2 parts by weight of isopropylmethylphenol as an antibacterial agent, 3.5 parts by weight of sorbitan monooleate, isopropyl myristate ( 7 parts by weight of IPM, 3.5 parts by weight of butanediol, 7 parts by weight of lactic acid, 0.07 parts by weight of dibutylhydroxytoluene (BHT) as an antioxidant, and an isocyanate-based crosslinking agent solution blocked for curing A casting solution was prepared by adding 3.5 parts by weight (approximately 30% solids). About the others, the sample of the skin masking material of Example 8 was prepared on the same conditions as Example 1. FIG.

[Example 9]
When preparing the casting solution in Example 8, 175 parts by weight of the composition solution, 3.5 parts by weight of ibuprofenpiconol as an anti-inflammatory agent, 0.2 parts by weight of isopropylmethylphenol as an antibacterial agent, monooleic acid 3.5 parts by weight of sorbitan ester, 7 parts by weight of isopropyl myristate (IPM), 3.5 parts by weight of butanediol, 7 parts by weight of lactic acid, 0.07 parts by weight of dibutylhydroxytoluene (BHT) as an antioxidant, and Therefore, 1.3 parts by weight of an isocyanate-based crosslinking agent solution (solid content: about 60% by weight) was added to prepare a casting solution. About the others, the sample of the skin masking material of Example 9 was prepared on the same conditions as Example 8.

[Example 10]
When preparing the film in Example 1, a substrate having a surface Rz of 25 μm was used as the peelable substrate for casting. In the film prepared in Example 10, Rz on the other surface (transfer surface) was 25 μm.

  When preparing the casting solution in Example 1, 175 parts by weight of the main component liquid of the acrylic resin-based adhesive, 3.5 parts by weight of ibuprofen piconol as an anti-inflammatory agent, and 0.2% by weight of isopropylmethylphenol as an antibacterial agent Parts, sorbitan monooleate 3.5 parts by weight, isopropyl myristate (IPM) 7 parts by weight, butanediol 3.5 parts by weight and lactic acid 7 parts by weight, dibutylhydroxytoluene (BHT) 0.07 part by weight as an antioxidant A cast solution was prepared by adding 3.5 parts by weight of an isocyanate-based crosslinking agent solution (solid content: about 60% by weight) for curing. About the others, the sample of the skin masking material of Example 10 was prepared on the same conditions as Example 1. FIG.

[Comparative Example 1]
When the film was prepared in Example 1, an OPP film substrate used for the production of a conventional urethane film was used as the peelable substrate for casting. The surface of this substrate was a smooth release paper made of OPP. On the other surface (transfer surface) of the film, the unevenness of the OPP release paper surface was transferred, and the Rz of the other surface of the film was 0.9 μm. About the others, the sample of the skin masking material of the comparative example 1 was prepared on the same conditions as Example 1. FIG.

[Comparative Example 2]
When the film was prepared in Example 1, a substrate having a surface Rz of 3 μm was used as the peelable substrate for casting. As the urethane resin solution, a solution in which 100 parts by weight of Leocoat U-6285M (solid content 30% by weight) (manufactured by Toray Cortex Co., Ltd.) and 100 parts by weight of ethyl acetate was used. No fine particles were added to this urethane resin solution. Rz of the other surface (transfer surface) of the film was 3 μm. About the others, the sample of the skin masking material of the comparative example 2 was prepared on the same conditions as Example 1. FIG.

[Comparative Example 3]
When the film was prepared in Example 1, a substrate having a surface Rz of 10 μm was used as the peelable substrate for casting. Moreover, it replaced with using the urethane resin solution in Example 1, and prepared the pellet of the polyethylene resin. The same kind of fine particles as in Example 1 were kneaded with 26.1 parts by weight of this polyethylene resin in the same amount. The polyethylene resin kneaded with the fine particles was extruded onto the surface of the peelable substrate for casting and peeled from the substrate to obtain a support X. Rz of the other surface (transfer surface) of the film was 5 μm. About the others, the sample of the skin masking material of the comparative example 3 was prepared on the same conditions as Example 1. FIG.

[Calculation method of Rz value of other surface of film layer in Examples and Comparative Examples]
About the sample of the skin masking material of an Example and a comparative example, the value of Rz of the other surface of a film layer was computed with the following method.
(1) About an arbitrary location on the other surface of the sample, in accordance with JIS B 0601: 2001, the surface shape of the location using a surface roughness measuring machine under the conditions of a reference length of 500 μm and a cutoff value of 200 μm Was measured and the value of Rz of the said location was obtained.
(2) The operation of (1) was repeated at 20 locations on the other surface to obtain 20 Rz values.
(3) The average value of 20 Rz values was used as the Rz value on the other surface of the sample film layer.

[Characteristic values of Examples and Comparative Examples]
Table 1 shows the characteristic values of the film layer and the skin masking material for the samples of the skin masking material obtained in Examples and Comparative Examples.

[Consideration of relationship between manufacturing method and Rz on other side]
At the time of trial manufacture of the sample, in Example 1, a polyether polyurethane (EU) resin solution was cast on the surface of a peelable substrate for casting having an Rz of 10 μm to make a prototype. In Example 1, the unevenness of the substrate surface was transferred to the other surface of the film layer. As shown in Table 1, the Rz of this other surface was 10 μm. On the other hand, in Comparative Example 3, a molten polyethylene (PE) resin was prototyped by extruding it onto the surface of a cast peelable substrate having an Rz of 10 μm. At this time, Rz on the other surface in Comparative Example 1 was 5 μm.

  In Comparative Example 3, the same peelable substrate for casting as in Example 1 was used, but the unevenness on the surface of the substrate was not sufficiently transferred to the other surface of the film. For this reason, in the sample according to Comparative Example 3, the unevenness formed on the other surface was rounded, and the other surface was slippery. The reason why the unevenness on the substrate surface was not sufficiently transferred in Comparative Example 3 is that when the molten polyethylene (PE) resin was extruded onto the substrate surface, the resin was not a fluid liquid. It is done. When producing the skin masking material according to the present invention, the skin masking material having a larger Rz value on the other side is produced by casting the resin solution on the substrate surface rather than extruding the molten resin onto the substrate surface. Suitable for manufacturing.

[Consideration of the relationship between Rz on other side and moisture permeability]
In Examples 1 to 3, the resin of the film layer and the material of the pressure-sensitive adhesive layer are common, but Rz on the other surface is different. In Examples 1 to 3, it was shown that the moisture permeability of the skin masking material increases as the value of Rz increases.

[Characteristic values regarding optical characteristics of Examples and Comparative Examples]
Table 2 shows optical characteristic values of the skin masking material samples obtained in Examples and Comparative Examples.

[Consideration of relationship between Rz of other surface and total light transmittance]
In Examples 1 to 10 and Comparative Example 1, the film layer material of the skin masking material was dispersed so that fine particles having the same composition accounted for 13.3% by weight with respect to the film weight as the film layer material. It was a urethane film, and under the common condition that the thickness w of the film layer was 30 μm, the difference in the total light transmittance of the sample was caused based on the difference in the size of Rz on the other surface. As shown in Table 2, in Examples 1 to 10, the Rz of the other surface was 6 to 25 μm, and the total light transmittance of the film layer was 86.0% to 89.8%. On the other hand, in Comparative Example 1, Rz was 0.9 μm and the total light transmittance was 91.1%. In Comparative Example 3, a polyethylene film having Rz of 5 μm on the other surface dispersed so that fine particles account for 13.3% by weight is used as a material for the film layer, and the total light transmittance is 90.6%. there were.

  From the relationship between Rz on the other surface and the total light transmittance of the film layer, it was shown that the total light transmittance was 90% or less when Rz was 6 μm or more. When Rz is 6 μm or more, if the height difference of the unevenness formed on the other surface is large, it is considered that the incident light to the film layer is greatly refracted by the unevenness and the total light transmittance is reduced to 90% or less. On the contrary, since the value of Rz is smaller than 6 μm, if the height difference of the unevenness formed on the other surface is small, it is considered that the other surface has a nearly smooth shape, and the incident light is not easily refracted by the unevenness. In order to keep the total light transmittance of the skin masking material at 90% or less, it is considered effective to set the Rz of the other surface to 6 μm or more.

[Consideration of the relationship between fine particles and total light transmittance]
In Comparative Example 1, the fine particles are dispersed so as to occupy 13.3% by weight with respect to the weight of the film that is the material of the film layer, the Rz on the other surface is 0.9 μm, and the total light transmittance is It was 91.1%. On the other hand, in Comparative Example 2, the film layer did not contain fine particles, Rz was 3 μm, and the total light transmittance was 95.9%. The comparative example 2 has a higher total light transmittance despite the larger Rz value because the comparative example 2 does not contain fine particles and therefore the incident light is not absorbed and scattered by the fine particles. This is considered to be caused by this. In order to keep the total light transmittance of the film layer at 90% or less with the skin masking material, it is considered effective that fine particles are dispersed in the film layer.

[Consideration of the relationship between fine particles, parallel light transmittance and haze]
Similarly, when the parallel light transmittance and the haze (haze value) were compared between Comparative Example 1 and Comparative Example 2, the film of Comparative Example 2 was larger than that of Comparative Example 1 although the value of Rz was larger. The parallel light transmittance of the layer was high, and the haze (cloudiness value) of the film layer was low. Since the film layer of Comparative Example 2 does not contain fine particles, it is considered that incident light is diffusely reflected and diffused by the fine particles. On the other hand, in Examples 1 to 10 and Comparative Examples 1 and 3 in which the fine particles are dispersed so as to occupy 13.3% by weight with respect to the weight of the film as the material of the film layer, regardless of the value of Rz, The parallel light transmittance was 9.3 to 10.6%, and the haze (cloudiness value) was 87.8 to 89.4%. In order to keep the parallel light transmittance of the film layer at 0 to 12% and the haze (cloudiness value) of the film layer at 84 to 100% with a skin masking material, it is effective that fine particles are dispersed in the film layer. It is believed that there is.

[Ingredients contained in pressure-sensitive adhesive layers of Examples and Comparative Examples]
Table 3 shows the medicinal components for the skin contained in the pressure-sensitive adhesive layer of the skin masking material samples obtained in Examples and Comparative Examples. Table 4 shows the weight ratio of the organic compound having a polar group, which is liquid at room temperature, and the pressure-sensitive adhesive layer contained in the pressure-sensitive adhesive layer.

[Consideration of organic compound having polar group that is liquid at normal temperature of adhesive layer]
As shown in Table 4, in producing samples of Examples and Comparative Examples, the casting solution used as the raw material for the pressure-sensitive adhesive layer was monooleic acid as an organic compound having a polar group that is liquid at room temperature. Sorbitan ester and the like were added in the range of 25.6 to 31.2% by weight with respect to the pressure-sensitive adhesive layer. As a result, in all the samples of Examples and Comparative Examples, the pressure-sensitive adhesive layer became a gel.

[Composition of casting solution used in preparation of pressure-sensitive adhesive layer in Examples and Comparative Examples]
Table 5 shows a part of the composition of the monomer and the crosslinking agent for the casting solution used as the material for the pressure-sensitive adhesive layer.

[Consideration on composition of casting solution used in preparation of adhesive layer]
The present inventor studied the composition of monomers and cross-linking agents added to the casting solution in order to prepare the pressure-sensitive adhesive layers of Examples and Comparative Examples. In the examination, when acrylic acid (AA) is added as a comonomer that becomes a crosslinking point of the adhesive polymer compound, copolymerization is performed, and further when an isocyanate-based crosslinking agent is added, the adhesive strength, stickiness, and aggregation of the adhesive layer The adhesive properties such as force were evaluated. Based on the results of the evaluation, the amount of the cross-linking agent that improves the adhesive properties of the adhesive layer was examined, and the adhesive strength of the adhesive layer was in the range of 0.1 to 10 (N / 25 mm) and was sticky. In order to improve the cohesive force and the like, it is necessary to add a large amount of the crosslinking agent so that the weight ratio of the solid content of the crosslinking agent to the pressure-sensitive adhesive layer is 2.0% by weight or more.

  For this reason, as shown in Table 5, in the samples prepared as Examples 1-4, 6, 7, 10, and Comparative Examples 1-3, acrylic acid (AA) was added as a comonomer and copolymerized, Furthermore, the pressure-sensitive adhesive layer was prepared with a composition in which the weight ratio of the solid content of the isocyanate-based crosslinking agent to the pressure-sensitive adhesive layer was 2.0% by weight or more. Nevertheless, in the samples of Examples 1-4, 6, 7, 10, and Comparative Examples 1-3, the cohesive force of the pressure-sensitive adhesive layer was weak, and a tendency to cause adhesive residue when the sample was peeled was observed. The cohesion of acrylic acid (AA) as a comonomer and the cohesion caused the cohesive strength of the pressure-sensitive adhesive layer to be weakened was due to the monooleic acid sorbitan ester contained in the casting solution at a high concentration and the crosslinking agent and acrylic acid. It is considered that the cross-linking reaction with (AA) is inhibited and the cross-linking of the adhesive polymer compound is insufficient.

  On the other hand, when hydroxyethyl acrylamide (HEAA) is added and copolymerized as a comonomer serving as a cross-linking point, or when hydroxyethyl acrylate (HEA) is added and copolymerized, a solid isocyanate crosslinking agent is used. Even when the weight ratio of the component to the pressure-sensitive adhesive layer was as small as 0.8% by weight, the pressure-sensitive adhesive properties of the pressure-sensitive adhesive layer were good.

  Based on the results of the study, the solid content of the isocyanate-based crosslinking agent occupies when hydroxyethyl acrylamide (HEAA) is added and copolymerized or when hydroxyethyl acrylate (HEA) is added and copolymerized. Examples 5 and 9 were prepared with a composition having a weight ratio of 0.8% by weight. When copolymerization is performed by adding hydroxyethyl acrylamide (HEAA) or hydroxyethyl acrylate (HEA), the cross-linking reaction is sorbitan monooleate compared to the case of copolymerization by adding acrylic acid (AA). Since it was difficult to be inhibited by the ester, it is considered that the crosslinking reaction of the adhesive polymer compound was sufficiently advanced even when the amount of the isocyanate-based crosslinking agent added was small.

  On the other hand, when hydroxyethylacrylamide (HEAA) is added and copolymerized as a comonomer that becomes a crosslinking point, and an isocyanate crosslinking agent protected (blocked) with a blocking agent is added as a crosslinking agent, an adhesive layer In order to improve the pressure-sensitive adhesive properties, it was necessary to add so that the weight ratio of the solid content of the isocyanate-based crosslinking agent protected by the blocking agent to the pressure-sensitive adhesive layer was 1.1% by weight. .

  Based on the results of the study, when hydroxyisacrylamide (HEAA) is added and copolymerized, and further an isocyanate-based crosslinking agent protected with a blocking agent is added, the weight ratio occupied by the solid content of the crosslinking agent is 1 Example 8 was prepared with a composition of 1 wt%. When an isocyanate-based crosslinking agent protected with a blocking agent was added, it was necessary to add more crosslinking agent than when it was not protected with a blocking agent, but it cannot be said that the crosslinking reaction was inhibited. It is done. It is the isocyanate group that participates in the crosslinking reaction in the molecule of the isocyanate-based crosslinking agent, but the proportion of the isocyanate group in the molecule of the crosslinking agent decreases because the molecule of the blocking agent is bonded to the molecule of the crosslinking agent. However, it is considered that it was necessary to add a large amount of the crosslinking agent including the weight of the blocking agent. When an isocyanate-based crosslinking agent protected with a blocking agent was added, it is considered that the crosslinking reaction proceeded for each isocyanate group as in Example 9.

[Evaluation method for cosmetic paste]
About the sample of the Example and the comparative example, the goodness of the makeup paste was evaluated by the following method.
(1) As a cosmetic, a commercially available foundation having an average particle diameter d of 6 μm was prepared. Five women aged 20 to 35 participated as subjects.
(2) A test subject put a sample of a skin masking material on the cheek, and then applied a commercially available foundation on the cheek using a normal usage method.
(3) The test subject observed his / her cheek with makeup, and scored the results of the observation according to the following criteria.
Compared to the case where the sample is not pasted, if the paste feels the same ... When compared to the case where the 10-point sample is not pasted, if the paste feels uncomfortable ... Compared to the case where the 7-point sample is not pasted, the paste If you feel that it is a little bad ... If you feel that the glue is clearly worse than if you did not paste the 4-point sample ... 0 points (4) Find the average score from the scoring results by 5 subjects, Evaluation was made according to the following criteria.
8.0 to 10.0 points ... ◎
6.0 to less than 8.0
4.0 to less than 6.0
Less than 4.0 points ×

[Evaluation results and discussion of cosmetic paste]
Table 6 shows the evaluation results of the cosmetic paste for the samples of Examples and Comparative Examples.

  As shown in Table 6, in Examples and Comparative Examples, a difference occurred in the goodness of the makeup paste based on the value of Rz on the other surface of the film layer. In Examples 3 and 6 to 10, Rz was 18 μm or 25 μm, and the subject felt that the makeup paste did not change compared to the case where the sample was not pasted. In Examples 1, 4 and 5, Rz was 10 μm, and the test subject felt uncomfortable with the makeup paste as compared to the case where no sample was applied. In Example 2, Rz was 6 μm, and the subject felt that the makeup paste was slightly worse than when the sample was not applied. In Comparative Examples 1 to 3, Rz was 0.9 to 5 μm, and the subject felt that the makeup paste was clearly worse than the case where the sample was not applied.

  These evaluation results can be paraphrased by the value of the ratio of Rz to the average particle diameter d. That is, when the ratio of Rz to the average particle diameter d of the powder contained in the cosmetic is 3.0 times or 4.2 times, it is felt that the makeup paste does not change compared to the bare skin. At 1.7 times, the makeup paste was uncomfortable compared to the bare skin. At 1.0 times, I felt that the makeup paste was slightly worse than the bare skin. From 0.2 times to 0.8 times, I felt that the makeup paste was clearly worse than the bare skin. From these evaluation results, in order for the skin masking material according to the present invention to exhibit a good effect of makeup paste, Rz on the other surface is 1.0 times or more the average particle diameter d of the powder contained in the cosmetic. It was shown that there is a necessity.

  Further, in Comparative Example 3, the polyethylene (PE) resin of the film layer has low affinity with the powder contained in the cosmetic, and the recesses formed on the other surface are rounded and the powder is likely to slip off. This is also considered to be the reason why the subject felt that the makeup paste was clearly bad in Comparative Example 3. If the resin of the film layer has a high affinity with the powder contained in the cosmetic, such as a polyether polyurethane (EU) resin or a polyester polyurethane resin, it is considered that the effect of applying the makeup is further exhibited.

  In Examples 1 to 10 and Comparative Examples 1 and 2, the film layer resin is a polyether polyurethane (EU) resin, and the film used as the material for the film layer has a tensile modulus of 0.2 to 5 MPa. It was within the range, and after applying the sample, the subject did not feel discomfort in the cheek feel. On the other hand, in Comparative Example 3, the resin of the film layer is polyethylene (PE) resin, and the film used as the material of the film layer has a tensile modulus of elasticity exceeding 5 MPa. I felt uncomfortable. For this reason, in Comparative Example 3, the test subject unintentionally touched the sample with his / her finger after applying the cosmetic, and the trace of makeup peeling off was conspicuous. From this, it is considered that the film serving as the material of the film layer preferably has a tensile elastic modulus in the range of 0.2 to 5 MPa in order to hold the powder on the other surface.

[Method for evaluating mask properties]
About the sample of an Example and a comparative example, mask property was evaluated with the following method.
(1) The test subject gave a 3 mm diameter mole on the cheek, and further stuck a sample thereon.
(2) The subject observed his / her cheeks without makeup, and evaluated the observation results according to the following criteria.
If you can hardly see the attached mole… ○
If there is a sticky mole, you can understand somehow ... △
When there is a sticky mole, you can clearly see ... ×

[Mask evaluation results and discussion]
Table 7 shows the evaluation results of the mask properties of the samples of the examples and comparative examples.

  As shown in Table 7, in Examples 1 to 10 and Comparative Examples 1 to 3, a difference occurred in the evaluation results of the mask properties based on the difference in the total light transmittance of the film layers. In Examples 1 to 10, the total light transmittance of the film layer was 85.4 to 89.8%, and good masking properties were obtained in which the attached mole was hardly visible. On the other hand, in Comparative Examples 1 and 3, the total light transmittance was 90.6 to 91.1%, and a masking property that could be understood if there was an attached mole was shown. In Comparative Example 2, the total light transmittance was 95.9%, it was clearly understood that there was a sticky mole, and almost no masking property was shown.

  From these evaluation results of the masking properties, the lower the total light transmittance of the film layer, the higher the masking properties, and the skin masking material has good masking properties if the total light transmittance is about 90% or less. It has been shown. In Examples 1 to 10 and Comparative Examples 1 and 3, the parallel light transmittance of the film layer is 9.3 to 10.6%, and the haze (haze value) of the film layer is 87.8 to 89. .4% is considered to have contributed to the display of masking properties. On the other hand, in Comparative Example 2, the parallel light transmittance of the film layer is 60.8%, and the haze (cloudiness value) of the film layer is 36.6%, which leads to the result that the mask property is not exhibited. It is thought. In the samples of Examples and Comparative Examples, since the pressure-sensitive adhesive layer is transparent and thin with a thickness of 15 μm, it is considered that the evaluation result of the mask property is hardly affected.

  Regarding the material of the film layer, the difference is that the resin of Comparative Example 1 is polyether polyurethane (EU) and the resin of Comparative Example 3 is polyethylene (PE). However, in Comparative Example 1, the total light transmittance of the film layer is 91.1%, while in Comparative Example 3, the total light transmittance of the film layer is 90.6%. The values are approximate, and the evaluation of the mask property is almost the same. Even if the resin of the film layer is different, the skin masking material is considered to exhibit substantially the same masking property if the total light transmittance is approximate.

  For this reason, it is considered that the masking property of the skin masking material is directly determined by the total light transmittance of the film layer. Further, it is considered that the total light transmittance of the film layer is determined by the fine particles dispersed in the film layer and the Rz on the other surface for the reason described above. Therefore, it is considered that the dispersion of fine particles in the film layer and the Rz on the other surface of 6 μm or more are effective in reducing the total light transmittance of the skin masking material and exhibiting masking properties.

[Antimicrobial evaluation method]
About the sample of an Example and a comparative example, antibacterial property was evaluated with the following method.
(1) As the agar medium, Mueller Hinton Agar Medium-N manufactured by Nissui Pharmaceutical Co., Ltd. was used. The agar medium was sterilized by heating in an autoclave at 121 ° C. for 15 minutes.
(2) When the agar medium was cooled to some extent, the agar medium was dispensed into a petri dish. This agar medium was inoculated with S. aureus prepared to a concentration of about 10 ⁶ cfu / mi.
(3) After cutting the sample to a diameter of 10 mm, the adhesive protective part was peeled off from the sample to expose the skin contact surface of the adhesive layer. The sample from which the adhesive protective part had been peeled was placed on the center of the agar medium containing the indicator strain after solidification, with the skin contact surface on the bottom.
(4) The medium was allowed to stand for 48 hours in an atmosphere at 37 ° C. to culture the indicator strain.
(5) After 48 hours, the diameter of the inhibition circle appearing on the surface of the medium was measured. At that time, the antibacterial properties of the samples were evaluated according to the following criteria.
Those that do not allow a stop circle ... ×
Blocking circle is recognized and the diameter is less than 15mm ... ○
Blocking circle is recognized and the diameter is 15mm or more ... ◎

[Evaluation results and discussion of antibacterial properties]
Table 8 shows the antibacterial evaluation results for the samples of Examples and Comparative Examples.

  As shown in Table 8, in Examples 1 to 10 and Comparative Examples 1 to 3, differences occurred in the antibacterial evaluation results based on the medicinal components for the skin contained in the adhesive layer. In Examples 7 to 10, the medicinal component was isopropylmethylphenol, which is an antibacterial agent, and good antibacterial properties with a blocking circle having a diameter of 15 mm or more were observed. In Examples 4 to 6, the medicinal component was salicylic acid or lactic acid of α-hydroxy acids, and a blocking circle having a diameter of less than 15 mm was observed, indicating that it has antibacterial properties. In Examples 1 to 3 and Comparative Examples 1 to 3, no antibacterial property was shown because the adhesive layer contained no medicinal ingredients for the skin and no inhibition circle was observed.

  From these evaluation results, it was revealed that when the adhesive layer contains a medicinal component for the skin, the medicinal component is released from the adhesive layer and exhibits antibacterial properties. It is considered that the skin masking material according to the present invention can be used not only as a pharmaceutical product but also in the field of quasi drugs and cosmetics.

[Method of evaluating pain sensation by test subject]
For the samples of Examples 8 to 10, pain sensation was evaluated by the following method.
(1) The sample was affixed to the skin on the inner side of the subject's forearm.
(2) After 6 hours, the sample was peeled from the skin of the subject.
(3) The skin of the site where the sample was peeled was stimulated with a needle tip. The same force was applied to the needle tip each time it was sticking.
(4) When touched by the needle tip, the feeling felt by the subject was evaluated according to the following criteria.
If the subject felt nothing at all ... ◎
When the subject feels something a little ...
When the subject feels a slight sense of pain
If the subject feels pain ... ×
When subject feels pain strongly ...

[Results and discussion of pain sensation by test subjects]
Table 9 shows the evaluation results of pain sensation by the subjects for the samples of Examples 8 to 10.

  As shown in Table 9, in Examples 8 to 10, the anti-inflammatory drug contained in the pressure-sensitive adhesive layer is ibuprofen piconol. On the other hand, in Examples 8-10, the monomer which became the main component of the adhesive polymer of an adhesive layer differed, and the difference produced in the evaluation of the pain sensation by a test subject.

  In Example 8 and Example 9, although the crosslinking agent is different, the main component is an adhesive polymer obtained by copolymerization of 2-ethylhexyl acrylate (2-EHA), vinyl acetate (VA), and hydroxyethyl acrylate (HEA). It is common to be. In Examples 8 and 9, the subject was able to feel the pain sensation to such an extent that the subject was picked up by the tip of the needle and felt a little touched. On the other hand, in Example 10, the main component is an adhesive polymer compound copolymerized with 2-ethylhexyl acrylate (2-EHA), methoxyethyl acrylate (MEA), and acrylic acid (AA). The pain sensation was suppressed to such an extent that when I was struck, I felt a bit of a sensation of pain.

  From these evaluation results, it was shown that when ibuprofen piconol, an anti-inflammatory drug, was included in the adhesive layer, ibuprofen piconol was released into the skin. It is considered that the skin masking material can be used in the field of pharmaceuticals. Moreover, even if the crosslinking agent was different, no difference was observed in the release of ibuprofen piconol from the pressure-sensitive adhesive layer.

  On the other hand, from these evaluation results, it was shown that the degree of ibuprofen piconol release was different based on the difference in the monomers constituting the adhesive polymer compound of the adhesive layer. In Example 10, since the adhesive polymer compound has a carboxyl group derived from acrylic acid (AA) and ibuprofen piconol has a pyridine ring, ibuprofen piconol is contained in the adhesive layer by the interaction of these polar groups. It is considered that the release rate was decreased. It is considered that the skin masking material according to the present invention exhibits sustained release for an organic compound having a polar group such as ibuprofenpiconol when a pressure-sensitive adhesive polymer compound having a polar group is used as a material for the pressure-sensitive adhesive layer.

[Evaluation method of pain sensation by animal experiment]
For the samples of Examples 8 to 10, pain sensation was evaluated by the following method.
(1) A 6-week old SPF-made Wistar / ST male rat was purchased from Charles River Japan Co., Ltd. and preliminarily raised.
(2) After shaving the back of the rat, each of the samples of Examples 1 and 7 and Comparative Example 1 was applied to the back. Using a medical adhesive bandage, the entire adhered sample was covered and fixed with sterile gauze.
(3) After 6 hours, the sample was peeled from the back.
(4) The part of the back where the sample was peeled was stimulated with the needle tip. The same force was applied to the needle tip each time it was sticking. Similarly, the portion of the back where the sample was not applied was stimulated with a needle tip.
(5) The reaction exhibited by the rat when it was pricked with the needle tip was evaluated according to the following criteria.
If the rat did not respond to anything ...
If the rat shows a reaction to move any body immediately after being pecked ... △
When the rat shows escape behavior to the needle tip ... ×

[Evaluation results and discussion of pain perception by animal experiments]
Table 10 shows the evaluation results of pain sensation by animal experiments for the samples of Examples 8 to 10.

  As shown in Table 10, the evaluation of pain sensation by animal experiments was the same as the evaluation of pain sensation by the subjects shown in Table 9. In animal experiments, it was confirmed that the rat took escape behavior when it was stimulated by pricking the part of the back where the sample was not affixed with the needle tip. . In the test for evaluating pain sensation by test subjects and animal experiments, when the samples of Examples 8 to 10 were attached, it was shown that ibuprofen piconol was released from the skin masking material to alleviate the pain sensation.

[Method for evaluating wound healing]
For the samples of Examples 1 and 5 and Comparative Example 3, wound healing was evaluated by the following method.
(1) Six-week-old Wistar / ST male rats with 6 weeks old SPF were purchased from Japan Charles River Co., Ltd. and preliminarily raised.
(2) The back of the rat was shaved and an entire defect wound with a diameter of 10 mm was created under ether anesthesia.
(3) A sample was affixed to the wound part, gauze was placed on the sample, and the entire sample affixed from above the gauze using a medical adhesive bandage was fixed. In order to prevent infection, crystalline penicillin G (Meiji Seika Pharma Co., Ltd.) was administered intramuscularly as an antibiotic.
(4) The wound creation date was set to 0, and samples were exchanged every other day thereafter. When changing, the condition of the wound was observed.
(5) Based on the wound observation results, wound healing was evaluated when 5 or more of 6 animals in each group met the following criteria.
Almost no leakage of exudate was observed, and wound closure was confirmed within 8 days ... ◎
There was almost no leakage of exudate, and wound closure was observed within 10 days.
Leakage of exudate was observed and wound closure was confirmed within 10 days ... △
Leakage of exudate was observed, and wound closure was not observed within 10 days ... ×

[Wound healing evaluation results and discussion]
Table 11 shows the evaluation results of wound healing for the samples of Examples 8 to 10.

As shown in Table 11, in Comparative Example 3, the resin of the film layer was polyethylene (PE), whereas in Examples 1 and 5, it was polyether polyurethane (EU). Since the resin of the film layer was different, the moisture permeability was different, and the results of evaluation of wound healing differed in Examples 1 and 4 compared to Comparative Example 3. In Examples 1 and 5, the moisture permeability is in the range of 900 to 5,000 g / (m ² · day), and almost no leakage of the leachate is observed, so the odor when the sample is peeled is weak, 8 days The wound was closed. On the other hand, in Comparative Example 3, the water vapor transmission rate was 30 g / (m ² · day), and many leaks of the exudate were observed, so the smell was strong when the sample was peeled off, and the wound was closed. Took 10 days.

  From these evaluation results, it was shown that the wound healing is good when the moisture permeability is high. When a film with high moisture permeability is used as the material for the film layer, the wound on the wound surface with the skin masking material is suppressed from being steamed, and the growth of normal skin bacteria on the skin around the wound surface is suppressed, and the formation of a clean epidermis is promoted quickly. It is thought that wound healing was improved. Conversely, if a film with low moisture permeability is used, the skin around the wound surface with the skin masking material applied will be steamed, and bacteria will move from the surrounding skin to the wound surface, causing bacteria to grow and adversely affect wound healing. It is thought. The strong odor when a sample using a film with low moisture permeability is peeled off is considered to be caused by the increase of moisture in the skin around the wound surface, resulting in a moist state and the growth of normal bacteria on the skin.

  In the wound healing evaluation test, in each of Examples 1 and 5 and Comparative Example 3, healing was achieved without making a crust, and a clean epidermis was formed. Since this wound healing effect was also observed in Example 1 and Comparative Example 3 in which the adhesive layer does not contain a medicinal component for the skin, it does not result from the medicinal component. This effect is due to the wound surface being covered with the film layer and the pressure-sensitive adhesive layer constituting the sample and maintained in a wet state in each of Examples 1, 5 and Comparative Example 3.

  In addition, in all of Examples 1 and 5 and Comparative Example 3, no rash was observed on the skin around the wound surface. This effect is attributed to the fact that the pressure-sensitive adhesive layer is gel-like because the weight ratio of the organic compound having a polar group, which is liquid at room temperature, to the pressure-sensitive adhesive layer is about 30% by weight. When the pressure-sensitive adhesive layer is in the form of a gel, irritation to the skin is suppressed when the sample is replaced, and skin irritation is suppressed. When the pressure-sensitive adhesive layer is gel, the skin masking material according to the present invention can prevent the skin around the wound surface from being covered and wound healing being delayed.

  The skin masking material according to the present invention can be attached to the skin of the part in order to hide the extraneous part generated on the skin, and further, a cosmetic such as a foundation or a concealer can be placed on the part to make it inconspicuous. Furthermore, when the skin masking material according to the present invention contains a medicinal component for the skin in the adhesive layer, the skin masking material is applied to a different part to make it inconspicuous, and at the same time, treat the foreign part. Can do. In addition, the skin masking material according to the present invention can correct wrinkles and sagging of the skin by raising the loose skin when applied to the skin with loose face depending on the shape and the way of applying the skin masking material. If the skin masking material affixed at this time is made inconspicuous by applying makeup, the face can appear younger. In addition, the skin masking material according to the present invention can be affixed to the surface of an object other than the skin, eliminates the gloss of the surface, suppresses reflection of light on the surface, and prevents the surface from slipping. You can do it. Even when such a surface includes a curved surface or a spherical surface, the skin masking material according to the present invention can be applied.

2 Skin masking material 4 Film layer 6 Adhesive layer 10 Other side 12 One side

Claims (12)

The pressure-sensitive adhesive layer is laminated on at least a part of one surface of the stretchable film layer,
When the average particle diameter of the powder contained in the cosmetic applied to the other surface of the film layer is d and the thickness of the film layer is w, the ten-point average roughness Rz of the other surface is d ≦ A skin masking material satisfying Rz ≦ 60d and Rz ≦ w. The pressure-sensitive adhesive layer is laminated on at least a part of one surface of the stretchable film layer,
A skin masking material in which the ten-point average roughness Rz of the other surface of the film layer is 6 μm ≦ Rz ≦ 40 μm and Rz ≦ w, where w is the thickness of the film layer.   The skin masking material according to claim 1 or 2, wherein fine particles are dispersed in the film layer so that the total light transmittance of the film layer is 75 to 90%. The skin masking material according to any one of claims 1 to 3, wherein the moisture permeability is 400 g / (m ² · day) or more.   The skin masking material according to any one of claims 1 to 4, wherein the pressure-sensitive adhesive layer contains 10 to 50% by weight of an organic compound having a polar group that is liquid at room temperature.   The skin masking material according to any one of claims 1 to 5, wherein the adhesive layer contains a medicinal component for skin.   The skin masking material according to claim 6, wherein the medicinal component contains a compound selected from the group consisting of α-hydroxy acids, salicylic acid, and mixtures thereof.   The skin masking material according to claim 6 or 7, wherein the medicinal component contains an antibacterial agent.   The skin masking material according to claim 8, wherein the antibacterial agent comprises a compound selected from the group consisting of isopropylmethylphenol, a silver-based antibacterial agent, and a mixture thereof.   The skin masking material according to any one of claims 6 to 9, wherein the medicinal component contains a non-steroidal anti-inflammatory drug.   The skin masking material according to any one of claims 1 to 10, wherein a material of the film layer is polyether polyurethane or polyester polyurethane.   The skin masking material according to claim 1, wherein a thickness w of the film layer is 6 μm ≦ w ≦ 100 μm.

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