JP6923928B2 - Masking sticker and sheet with masking sticker - Google Patents

Description

The present invention relates to a masking sticker and a sheet with a masking sticker. More specifically, in photo-epilation, which is one of the hair removal methods for removing unwanted hair on the skin, a masking sticker and a masking sticker attached to mask a part of the skin that does not want to be irradiated with light, such as a mole. Regarding the attached sheet.

For the purpose of beauty, especially for women, hair removal treatment is performed to remove unwanted hair on the skin. In recent years, photoepilation is known as a method for treating skin hair removal (hair removal method), and is carried out at beauty salons (hair removal salons), clinics, and the like.

In such photo-epilation, light emitted from the light source portion of the photo-epilation device is applied to the skin to be treated to suppress the growth of body hair to perform hair removal (see, for example, Patent Document 1 and the like). , These hair removal methods are carried out based on the principle that special light reacts with melanin that makes waste hair in the hair root, and the melanin emits heat to destroy the regeneration function of waste hair.

Further, as photo-epilation, a method using Intense Pulsed Light (IPL) is the mainstream. IPL is generally light emitted by a xenon lamp (also called a xenon lamp) for a very short time using a capacitor or the like, but it is wasteful by utilizing the characteristic of IPL that reacts with a black dye. This is a method of removing waste hair by damaging the hair papilla and hair matrix cells around the hair.

On the other hand, when moles (mole, mole, etc.) are present on the skin, the pigments that make up the moles are also melanin, so when irradiated with light such as IPL, they react not only with melanin in the pores but also with melanin in the moles. The fever in the mole area causes the practitioner to feel pain. In addition, since the mole has a larger area and is more responsive than the melanin in the pores, it not only causes pain, but also burns due to fever, and in some cases, induces so-called "melanoma" mole cancer. There was a possibility.

For this reason, in beauty salons, clinics, etc., a medical masking tape or the like composed of a support or the like having an adhesive layer is attached to a place where a mole exists to cover the mask (cover, the same applies hereinafter. ) Was applied to prevent the mole from being irradiated with light before performing the treatment (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2001-197921 Japanese Unexamined Patent Publication No. 2008-113763

However, with conventional masking tape or the like, in photo-epilation by IPL or the like, the irradiated light may reach the mole, which is not preferable.

The present invention has been made in view of the above problems, and provides a masking sticker and a sheet with a masking sticker capable of reliably masking a portion that does not want to be irradiated with light such as a mole from light in photo-epilation by IPL or the like. To provide.

In order to solve the above-mentioned problems, the masking sticker according to the present invention is attached to a portion of the skin that is not to be irradiated with light when hair is removed by irradiating the skin with light, and is used for hair removal. A masking sticker for blocking the light emitted to the skin, and a first layer composed of a white thermoplastic resin sheet appearing on the surface for blocking the irradiated light by reflecting the irradiated light. A second layer that has elasticity and is a support thicker than the first layer, a first adhesive layer that adheres the first layer and the second layer, and the first layer in the second layer. It is characterized by including a second adhesive layer formed on a surface opposite to the surface facing the skin and formed of an acrylic pressure-sensitive adhesive which is a layer to be attached to the skin.

Further , the masking sticker according to the present invention is attached to a portion of the skin where light is not desired to be irradiated when hair is removed by irradiating the skin with light, in order to block the light irradiated for hair removal. It is a masking sticker of the above, and is formed of a white polyester resin sheet composed of a foamed film or a light diffusing agent appearing on the surface for blocking the irradiated light by diffusely reflecting the irradiated light. In the first layer, a second layer which has elasticity and is a support thicker than the first layer, a first adhesive layer which adheres the first layer and the second layer, and the second layer. It is characterized by including a second adhesive layer formed on a surface opposite to the surface facing the first layer and serving as a layer to be attached to the skin .

Further, the masking sticker according to the present invention is attached to a portion of the skin that is not to be irradiated with light when hair is removed by irradiating the skin with light, in order to block the light emitted for hair removal. A first layer composed of a white thermoplastic resin sheet that appears on the surface and a stretchable white cotton cloth for blocking the irradiated light by reflecting the irradiated light. A second layer serving as a support composed of the same, a first adhesive layer for adhering the first layer and the second layer, and a surface of the second layer opposite to the surface facing the first layer are formed. It is characterized by including a second pressure-sensitive adhesive layer composed of an acrylic pressure-sensitive adhesive, which is a layer to be attached to the skin.

Further, the masking sticker according to the present invention is attached to a portion of the skin where light is not desired to be irradiated when hair is removed by irradiating the skin with light, and blocks the light irradiated for hair removal. A first masking sticker for the purpose, which is composed of a white thermoplastic resin sheet that appears on the surface and has a thickness of 50 μm to 200 μm for blocking the irradiated light by reflecting the irradiated light. The layer, the second layer which is elastic and has a thickness of 250 μm to 500 μm, the first adhesive layer which adheres the first layer and the second layer, and the first adhesive layer in the second layer. It is characterized by including a second adhesive layer formed on a surface opposite to the surface facing the layer and serving as a layer to be attached to the skin.

In the masking seal according to the present invention, in the present invention, the adhesive strength of the first adhesive layer is 3.0 to 10.0 N / cm, and the adhesive strength of the second adhesive layer is 0.5 to 3. It is characterized by being 0 N / cm.

Masking seal according to the present invention, in the present invention described above, wherein the second adhesive layer and the first adhesive layer is formed by an acrylic adhesive in both layers.

The sheet with a masking sticker according to the present invention is characterized in that the above-mentioned masking sticker according to the present invention is attached on a release paper.

The sheet with a masking sticker according to the present invention is characterized in that the masking sticker according to the present invention is formed in a circular shape, and a plurality of masking stickers are attached on a release paper .

The masking seal according to the present invention has a laminated structure of a plurality of layers such as a first layer and a second layer, and is a white heat capable of effectively blocking light from the surface layer or the first layer which is a layer appearing on the surface. Since it is a plastic resin sheet (polyester resin sheet, etc.), when performing photo-epilation of the skin, by attaching it to the part where you do not want to irradiate the skin light, you can surely block the irradiation of IPL etc. It is possible to prevent pain caused by fever. Further, since the adhesive layer or the second adhesive layer to be attached to the skin of the masking sticker according to the present invention is provided independently of the surface layer or the first layer, a stretchable member for medical use or the like is selected. Can be done . Further, the sheet with a masking sticker also enjoys the effect of the masking sticker, and the masking sticker is attached on the release paper, so that the handling property is good.

It is a perspective view which showed one aspect of the masking seal which concerns on this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a figure which showed one aspect of the masking sticker which concerns on this invention, and is the front view of the sheet with a masking sticker which the masking seal was stuck on the release paper. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is a front view which showed the other aspect of the sheet with a masking seal.

Hereinafter, one aspect of the masking seal 1 according to the present invention will be described.

FIG. 1 is a perspective view showing one aspect of the masking seal 1 according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. In FIGS. 1 and 2, 1 is a masking sticker, 11 is a first layer, 12 is a second layer, A1 is a first adhesive layer, and A2 is a second adhesive layer.

The masking sticker 1 is attached to a part of the skin of the person to be treated that does not want to be irradiated with light, such as moles and stains, when photo-depilation of the skin is performed, and is white or skin-colored that appears on the surface at the time of application. A first layer 11 made of a thermoplastic resin sheet, a second layer 12 serving as a support, a first adhesive layer A1 for adhering the first layer 11 and the second layer 12, and a surface facing the first layer 11. The second adhesive layer A2, which is formed on the surface opposite to the above surface and is a layer directly attached to the skin in the second layer 12, is included as a basic configuration. In the present embodiment, as shown in FIGS. 1 and 2, the masking sticker 1 has a substantially circular shape as an example.

(I) First layer 11:
The first layer 11 is a layer that appears on the surface and is directly irradiated with light when photoepilation is performed. The first layer 11 is made of a white or flesh-colored thermoplastic resin sheet in order to block the irradiated light and prevent the light from reaching the mole or the like to be masked.

In the present invention, "white" refers to a color in a range that looks white by normal visual inspection. For example, it is a white color that reflects 99% or more of visible light such as magnesium oxide or barium sulfate, or a white color such as milky white, silver white, white lead, or titanium white, and also includes a white approximate color such as ivory. Similarly, in the present invention, the "skin color" considers not only human skin color (in the present invention, refers to Japanese skin color) but also visually identifiable factors such as color unevenness and luster. And includes all colors that are judged to represent human skin. In the present invention, the first layer 11 is preferably white in that it can efficiently block light such as an IPL.

Examples of the thermoplastic resin constituting the first layer 11 include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polystyrene-based thermoplastic elastomer resins, polyethylene, polypropylene, polyvinyl acetate, and ethylene-vinyl acetate co-weight. Conventionally known thermoplastic resins such as coalesced, ethylene-methacrylic acid copolymer, polyolefin-based resin such as ethylene-methyl methacrylate, and polyurethane-based resin can be used. The sheet constituting the first layer 11 of the present invention is a sheet made of a polyester resin (polyester sheet) in that (biaxial) stretching is easy and it is easy to impart a light diffusing action described later. It is preferable, and it is particularly preferable to use a white polyester-based sheet. In the present invention, "sheet" is an interpretation that includes "film", and includes those capable of stretching (uniaxial direction (longitudinal, horizontal) and biaxial direction). .. If necessary, the first layer 11 may be subjected to surface treatment such as embossing as long as the object and effect of the present invention are not impaired.

The thickness of the first layer 11 is not particularly limited, but is preferably 25 to 250 μm, particularly preferably 50 to 200 μm in order to reliably block the light such as IPL irradiated in photoepilation.

The first layer 11 appropriately scatters and reflects the light energy irradiated by IPL or the like. For example, a light diffusing agent may be added to a thermoplastic resin such as a polyester resin, or the heat of a polyester resin or the like may be added. By forming a foamed film made of a plastic resin, it is possible to efficiently block the light such as IPL irradiated in the photo-hair removal. Examples of such polyester-based sheets include Crisper (registered trademark) K2411 (manufactured by Toyobo Co., Ltd.), White PET Lumirror (registered trademark) E20, EA3S, E6SR (manufactured by Toray Industries, Inc.), and the like.

The total light transmittance of the first layer 11 is, for example, preferably 0 to 15.0%, and particularly preferably 0 to 11.0%. Within the range where the total light transmittance is applied, the irradiation of IPL or the like can be efficiently blocked, and the masked mole or the like can be prevented from becoming hot and painful. The total light transmittance is, for example, , JIS K7105, etc. may be measured.

(II) Second layer 12:
The second layer 12, which serves as a support for holding the shape of the masking seal 1, is adhered to the first layer 11 via the first adhesive layer (described later) A1, and is adhered to the second adhesive layer (also described later). ) A layer that is attached to the skin of the subject via A2. The second layer 12 is a layer that comes into contact with the skin through the second adhesive layer A2, and as a constituent material, a resin generally used for skin application, for example, polyethylene terephthalate or polyethylene na. Polyester-based resins such as phthalate, polystyrene-based thermoplastic elastomer resins, and polyolefin-based resins such as polyethylene, polypropylene, polyvinyl acetate, ethylene-vinyl acetate copolymers, ethylene-methacrylic acid copolymers, and ethylene-methyl methacrylate. , A sheet made of a conventionally known thermoplastic resin such as a polyurethane resin, a non-woven fabric, a woven cloth containing a cotton cloth, a knitted cloth, a paper, or the like can be used. Further, these may be a single layer, or two or more kinds may be combined and used as a laminated body.

It is preferable that the second layer 12 (including the first layer 11) has elasticity and flexibility. By giving the second layer 12 or the like elasticity or the like, it can be attached to a portion of the skin having a complicated shape without forming wrinkles or the like.

The thickness of the second layer 12 is not particularly limited, but is preferably 200 to 750 μm. By setting the thickness of the second layer 12 within such a range, it is possible to maintain the mechanical strength of the support and to block light. The thickness of the second layer 12 is particularly preferably 250 to 500 μm.

The second layer 12 does not appear on the surface because the first layer 11 is present, but the color is preferably the same as that of the first layer 11, and is particularly preferably white.

(III) First Adhesive Layer A1 and Second Adhesive Layer A2:
The first adhesive layer A1 is interposed between the first layer 11 and the second layer 12, and adheres the first layer 11 and the second layer 12. Further, the second adhesive layer A2 is formed on the surface of the second layer 12 facing the skin of the subject (the surface opposite to the surface facing the first layer 11), and is detachably adhered to the skin. .. By providing the first adhesive layer A1 or the like, a shielding effect by these adhesive layers can be expected, and the mole or the like is surely masked from the irradiation of IPL or the like.

Examples of the adhesive constituting the first adhesive layer A1 and the second adhesive layer A2 include acrylic adhesive, natural rubber adhesive, and synthetic rubber (for example, isobutylene rubber, isoprene rubber, chloroprene rubber, and styrene-butadiene rubber). , Styrene-isoprene-styrene rubber, styrene-butadiene-styrene rubber, butadiene rubber, acrylonitrile-butadiene rubber, etc.) Adhesives, silicone adhesives, urethane adhesives, vinyl ester adhesives, vinyl ether adhesives, etc. Adhesives can be used. As the pressure-sensitive adhesive, one of these types can be used alone, or two or more of these types may be used in combination. Since the second adhesive layer A2 comes into direct contact with the skin, it is preferable to select and use an adhesive suitable for skin application so that a rash or the like does not occur when the second adhesive layer A2 comes into contact with the skin.

As the pressure-sensitive adhesive constituting the first pressure-sensitive adhesive layer A1 and the second pressure-sensitive adhesive layer A2, it is preferable to use an acrylic pressure-sensitive adhesive. In addition to adjusting the adhesive strength and characteristics of the adhesive, the acrylic adhesive is inexpensive, it is easy to adjust the moisture permeability, and it can be expected to have a shielding effect against light irradiation such as IPL.

As the acrylic pressure-sensitive adhesive, for example, an acrylic polymer (acrylic resin) (which may be a homopolymer or a copolymer) using one or more (meth) acrylic acid alkyl esters as a monomer component is used as a base. Examples thereof include an acrylic pressure-sensitive adhesive as a polymer. Examples of the (meth) acrylic acid alkyl ester include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, and (meth). Isobutyl acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, 2-Ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate , (Meta) dodecyl acrylate, (meth) tridecyl acrylate, (meth) tetradecyl acrylate, (meth) pentadecyl acrylate, (meth) hexadecyl acrylate, (meth) heptadecyl acrylate, (meth) octadecyl acrylate, Examples thereof include alkyl esters of (meth) acrylic acid having 1 to 20 carbon atoms such as nonadecil (meth) acrylic acid and eicosyl (meth) acrylic acid. Of these, it is preferable to use a (meth) acrylic acid alkyl ester having a linear or branched alkyl group having 4 to 18 carbon atoms.

The above-mentioned acrylic polymer (acrylic resin) may be copolymerized with the above-mentioned (meth) acrylic acid alkyl ester for the purpose of improving heat resistance, crosslinkability, cohesiveness, etc., if necessary. It may contain a unit corresponding to the monomer component.

The adhesive strength of the first adhesive layer A1 for adhering the first layer 11 and the second layer 12 (corresponding to the adhesive strength of the adhesive constituting the first adhesive layer A1; the same applies hereinafter) is 3.0 to 10. It is preferably 0 N / cm (for example, conforming to JIS Z0237 or the like). It is not preferable that the first layer 11 and the second layer 12 are peeled off during use, and the adhesive strength of the second adhesive layer A2 described later (corresponding to the adhesive strength of the adhesive constituting the second adhesive layer A2. The same applies hereinafter. ) Must be larger and may be permanently bonded. As long as the adhesive force of the first adhesive layer A1 is applied, the two layers are surely adhered to each other, and it is possible to prevent the two layers from being peeled off from each other even when the masking seal 1 is peeled off from the skin. .. On the other hand, if the adhesive strength is less than 3.0 N / cm, the adhesive strength is too weak, and the two layers may be peeled off from each other when the masking seal 1 is peeled off from the skin. The adhesive strength of the first adhesive layer A1 is particularly preferably 4.0 to 6.0 N / cm.

Further, the adhesive strength of the second adhesive layer A2 that comes into contact with the skin of the person to be treated and is adhered is preferably 0.5 to 3.0 N / cm (for example, conforming to JIS Z0237 or the like). As long as the adhesive force is applied, the masking sticker 1 is surely attached to the skin, and when it is peeled off, it can be smoothly peeled off from the skin without any discomfort. On the other hand, if the adhesive strength is less than 0.5 N / cm, the adhesive strength is too weak and the masking seal 1 may peel off from the skin in a short time. Since the adhesive strength is too strong, when the masking sticker 1 is peeled off from the skin, the skin may be irritated and the surface of the skin or the like may be damaged. The adhesive strength of the second adhesive layer A2 is particularly preferably 0.7 to 2.0 N / cm.

In order to maintain the adhesive strength and the like, the thickness of the first adhesive layer A1 is preferably 10 to 100 μm, particularly preferably 30 to 50 μm. The thickness of the second adhesive layer A2 is preferably 50 to 200 μm, and particularly preferably 50 to 100 μm.

(IV) Others:
In addition, in each of the above-mentioned layers, for example, a surfactant, a flame retardant, an antioxidant, a plasticizer, a cross-linking agent, a tackifier, an antistatic agent, and an antifogging agent, as long as the object and effect of the present invention are not impaired. , Dyes, fillers, thickeners, antistatic agents, conductive agents, UV absorbers, heat stabilizers, nucleating agents, light stabilizers, release modifiers, mold release agents, colorants (pigments) and neutralizers Etc., various additives generally used in the fields of resin sheets, adhesives, etc. may be added.

The thickness of the entire masking seal 1 is not particularly limited, but is preferably 1000 μm (1 mm) or less, preferably 300 to 800 μm, in consideration of handling (ease of handling), cost, and the like. Especially preferable.

(V) Manufacturing method of masking sticker 1 and sheet 2 with masking sticker 1:
FIG. 3 is a view showing one aspect of the masking sticker 1 according to the present invention, and is a front view of a sheet 2 with a masking sticker 1 on which the masking sticker 1 is attached on a release paper 13. FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. In FIG. 3, reference numeral 1 is attached only to a part of the masking seal 1 (the one having the BB cross section). As shown in FIG. 4, in the masking sticker 1, the first layer 11 appears on the surface, and the second adhesive layer A2 is adhered to the release paper 13.

Hereinafter, the method for manufacturing the masking sticker 1 is shown in FIGS. 3 and 4, in which the masking sticker 1 is attached onto the release paper 13 (the second adhesive layer A2 is adhered to the release paper 13). An embodiment of the release sheet 2 will be described as an example.

First, the first adhesive layer A1 is formed on the surface of the second layer 12 having the release paper 13 on the surface of the second adhesive layer A2 on which the second adhesive layer A2 is not formed. The first adhesive layer A1 on which the formed first layer 11 is applied is bonded together.

After the first layer 11 is bonded to the second layer 12 in this way, the mold is formed so as to have a desired masking seal 1 shape (circular shape in the case of FIG. 1 or the like) from above the first layer 11. The so-called ear portion of the masking sticker 1 in FIG. 1 (a laminate of parts other than the masking sticker 1 of the first layer 11, the first adhesive layer A1, the second layer 12, and the second adhesive layer A2) is removed. By removing the masking sticker 1, the sheet 2 with the masking sticker 1 attached on the release paper 13 (the pattern is attached in FIG. 3) can be easily manufactured.

The release paper 13 is not particularly limited, and for example, polyethylene coated paper (glassine paper, high-quality paper, kraft paper, etc.), polyester-based release paper such as polyethylene terephthalate (PET) and polyethylene naphthalate, polyethylene, ethylene- Examples thereof include vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polyethylene, polypropylene, ethylene-acrylic acid copolymer, ionomer resin, and polyimide. Further, a mixture of these resins may be used. Moreover, as a metal foil system, copper foil, aluminum foil, tin foil and the like can be mentioned.

The release paper 13 may have a single-layer structure of one of these types, or may have a laminated structure of two or more of these types. The thickness of the release paper 13 is preferably about 50 to 200 μm, and particularly preferably 70 to 150 μm.

The shape of the masking sticker 1 is not particularly limited as long as it can reliably mask a mole or the like, and is a polygonal shape such as a circular shape, a triangular shape, a square shape, a pentagonal shape, a hexagonal shape, a star shape, a geometric shape, or the like. , The shape can be determined arbitrarily. The size is not particularly limited as long as it can reliably mask a part such as a mole that is not to be irradiated with light. For example, in the case of a circular shape as shown in FIG. 1, φ5 to It is preferably 15, and particularly preferably φ5-10.

(VI) Effect of the present invention:
The masking seal 1 according to the present invention has a laminated structure of a first layer 11 and a second layer 12, and the first layer 11 which is a layer appearing on the surface is a white or flesh-colored thermoplastic resin sheet, so that photoepilation of the skin is performed. By attaching the sticker to a portion of the skin that does not want to be irradiated with light, the irradiation of IPL or the like can be reliably blocked, and the mole or the like can be prevented from causing pain due to heat generation.

Further, the sheet 2 with the masking sticker 1 also enjoys the effect of the masking sticker 1, and the masking sticker 1 is attached on the release paper 13, so that the handling property is also good. The masking sticker 1 and the sheet 2 with the masking sticker 1 can be widely used in photo-epilation performed at beauty salons (hair removal salons), clinics, homes, etc. by using light such as IPL.

(VII) Modification of the embodiment:
It should be noted that the embodiments described above show one aspect of the present invention, and the present invention is not limited to the above-described embodiment, but includes the configuration of the present invention and can achieve the object and the effect. Needless to say, modifications and improvements within the scope are included in the content of the present invention. Further, the specific structure, shape, etc. in carrying out the present invention may be any other structure, shape, etc. within the range in which the object and effect of the present invention can be achieved. The present invention is not limited to the above-described embodiments, and modifications and improvements within the range in which the object of the present invention can be achieved are included in the present invention.

For example, in the above-described embodiment, FIGS. 1 to 4 will be used, and the circular masking sticker 1 and the sheet 2 with the masking sticker 1 on which the circular masking sticker 1 is attached to the release paper 13 will be described as an example. However, the shape of the masking seal 1 can be arbitrarily determined, and it is not essential that the masking seal 1 is punched into a predetermined shape. For example, a masking sticker 1 is a masking sticker on which a sheet-like material obtained by laminating the first layer 11, the first adhesive layer A1, the second layer 12, the second adhesive layer A2, and the release paper 13 in this order is attached to the release paper 13. As the sheet 2 with 1, the release paper 13 is peeled off by appropriately cutting it into a desired shape at the time of use, and then the second adhesive layer A2 is attached to a part of the skin that is not to be irradiated with light, such as a mask. You may try to do it.

Further, the sheet 2 with the masking sticker 1 may have the configuration shown in FIG. FIG. 5 is a front view showing another aspect of the sheet 2 with the masking seal 1. The sheet 2 with the masking sticker 1 is a sheet-like material in which the first layer 11, the first adhesive layer A1, the second layer 12, the second adhesive layer A2, and the release paper 13 are laminated in this order from the first layer 11. The slits (cut lines) 3 reaching to the second adhesive layer A2 are formed in a grid pattern. Then, the masking sticker 1 from which the piece is peeled off at the time of photo-epilation can be attached to a portion of the skin such as a mole that is not to be irradiated with light.
In addition, the specific structure, shape, etc. at the time of carrying out the present invention may be other structures, etc. as long as the object of the present invention can be achieved.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not limited thereto.

The masking stickers of Example 1 and Comparative Examples 1 to 4 having the following configurations were attached to the moles of the treated person to mask them, and IPL was irradiated and evaluated by the method shown in Test Example 1. Here, a release paper is attached to the second adhesive layer in Example 1 and the adhesive layer in Comparative Examples 1 to 4 at the time of punching (to the total thickness of each of the following examples such as Example 1). Does not include the thickness of the release paper. The thickness of the release paper of Example 1 and Comparative Example 1 is 70 μm).

[Example 1]
As a laminated masking seal, a white foam polyester sheet (first layer) (Crisper (registered trademark) K2411 (manufactured by Toyobo Co., Ltd.), thickness 50 μm, total light transmittance 11.0% (based on JIS K7105) ) Was formed as an adhesive layer (first adhesive layer: adhesive strength 4.2 N / cm (based on JIS Z0237), thickness 30 μm) (total thickness 80 μm). 2730WL (3M Japan Co., Ltd.) in which an acrylic adhesive is formed as an adhesive layer (second adhesive layer: adhesive strength 1.0 N / cm (based on JIS Z0237)) on a white elastic cotton cloth (second layer). Example 1 was obtained by laminating (manufactured by a company) (total thickness 500 μm ) and punching it into a circular shape (outer diameter: φ9) to obtain the configurations shown in FIGS. 1 and 2 (total thickness 580 μm).

[Comparative Example 1]
As a single layer (1 layer) masking seal, 2730WL (manufactured by 3M Japan Ltd.) in which an acrylic adhesive (total thickness 500 μm) is formed as an adhesive layer on a white elastic cotton cloth has the same shape as in Example 1. It was punched out and used as Comparative Example 1.

[Comparative Example 2]
As a single layer (1 layer) masking seal, 1774W (manufactured by 3M Japan Ltd.) in which an acrylic adhesive (total thickness 560 μm described in the catalog) is formed as an adhesive layer on a white polyethylene foam has the same shape as that of Example 1. It was punched out and used as Comparative Example 2.

[Comparative Example 3]
As a masking seal for a single layer (one layer), 1773 (manufactured by 3M Japan Ltd.) in which an acrylic adhesive (total thickness 860 μm described in the catalog) is formed as an adhesive layer on a white polyethylene foam has the same shape as in Example 1. It was punched out to make Comparative Example 3.

[Comparative Example 4]
As a single layer (1 layer) masking seal, 9907W (manufactured by 3M Japan Ltd.) in which an acrylic adhesive (total thickness 250 μm described in the catalog) is formed as an adhesive layer on a white polyurethane non-woven fabric has the same shape as Example 1. It was punched out and used as Comparative Example 4.

[Test Example 1]
Evaluation by IPL irradiation:
With respect to the masking stickers of Example 1 and Comparative Examples 1 to 4, after peeling off the release paper, the sticker is attached to the mole of the person to be treated and masked, and the conditions are the same as those generally used for photoepilation (photo-epilation). When the light irradiation was performed by irradiating the IPL for about several seconds), the subject did not feel any heat or pain in Example 1 and could use it without any problem. On the other hand, in Comparative Examples 1 to 4, it was confirmed that the mole became hot and painful at the time of IPL irradiation, which caused a problem (light was transmitted to the skin (mole)).

The present invention can be used as a means for reliably masking a portion such as a mole that is not to be irradiated with light by photo-epilation using an IPL or the like, and has high industrial applicability.

1 …… Masking sticker 11 …… 1st layer 12 …… 2nd layer 13 …… Release paper 2 …… Sheet with masking sticker 3 …… Slit A1 …… 1st adhesive layer A2 …… 2nd adhesive layer

Claims (8)

When hair is removed by irradiating the skin with light, it is a masking sticker that is attached to the part of the skin that does not want to be irradiated with light and blocks the light emitted for hair removal.
A first layer composed of a white thermoplastic resin sheet appearing on the surface for blocking the irradiated light by reflecting the irradiated light, and
With the second layer, which has elasticity and is a support thicker than the first layer.
A first adhesive layer that adheres the first layer and the second layer,
A second adhesive layer formed of an acrylic adhesive which is formed on a surface of the second layer opposite to the surface facing the first layer and which is a layer to be attached to the skin.
A masking seal characterized by containing. When hair is removed by irradiating the skin with light, it is a masking sticker that is attached to the part of the skin that does not want to be irradiated with light and blocks the light emitted for hair removal.
A first layer formed of a white polyester resin sheet composed of a foamed film or a light diffusing agent appearing on the surface for blocking the irradiated light by diffusely reflecting the irradiated light, and a first layer.
With the second layer, which has elasticity and is a support thicker than the first layer.
A first adhesive layer that adheres the first layer and the second layer,
A second adhesive layer formed on a surface of the second layer opposite to the surface facing the first layer and affixed to the skin, and a second adhesive layer.
A masking seal characterized by containing. When hair is removed by irradiating the skin with light, it is a masking sticker that is attached to the part of the skin that does not want to be irradiated with light and blocks the light emitted for hair removal.
A first layer composed of a white thermoplastic resin sheet appearing on the surface for blocking the irradiated light by reflecting the irradiated light, and
With a second layer that serves as a support composed of elastic white cotton cloth
A first adhesive layer that adheres the first layer and the second layer,
A second adhesive layer formed of an acrylic adhesive which is formed on a surface of the second layer opposite to the surface facing the first layer and which is a layer to be attached to the skin.
A masking seal characterized by containing. When hair is removed by irradiating the skin with light, it is a masking sticker that is attached to the part of the skin that does not want to be irradiated with light and blocks the light emitted for hair removal.
A first layer made of a white thermoplastic resin sheet that appears on the surface and has a thickness of 50 μm to 200 μm for blocking the irradiated light by reflecting the irradiated light, and
With a second layer that serves as a support that has elasticity and a thickness of 250 μm to 500 μm.
A first adhesive layer that adheres the first layer and the second layer,
A second adhesive layer formed on a surface of the second layer opposite to the surface facing the first layer and affixed to the skin, and a second adhesive layer.
A masking seal characterized by containing. The adhesive strength of the first adhesive layer becomes 3.0~10.0N / cm, claims 1, wherein the adhesive strength of the second adhesive layer is 0.5~3.0N / cm The masking sticker according to any one of claims 4. Masking seal according to any one of claims 1 to 5 wherein the second adhesive layer and the first adhesive layer is characterized in that it is formed by an acrylic adhesive in both layers. A sheet with a masking sticker, wherein the masking sticker according to any one of claims 1 to 6 is attached on a release paper. The masking sticker according to any one of claims 1 to 6, wherein the masking sticker is formed in a circular shape, and a plurality of the masking stickers are attached on a release paper.

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