Beauty sheets and beauty methods

Abstract

To provide a beauty sheet and a beauty method that allow a porous urethane resin film containing collagen peptide powders to be applied to the skin without using an adhesive.SOLUTION: The beauty sheet is obtained by laminating and integrating a water-permeable sheet 1, a water-soluble adhesive 2, a porous urethane resin film 3 for applying to the skin, and a protective sheet 4 in this order. The beauty method performed using the beauty sheet is as follows. The protective sheet 4 is peeled off to expose the porous urethane resin film 3. The exposed surface of the porous urethane resin film 3 is applied to the skin wet with water. After application, water is sprayed onto the water-permeable sheet 1 to allow the water to penetrate into the water-permeable sheet 1. After dissolving the water-soluble adhesive 2 in the water, when the water-permeable sheet 1 is slid in the surface direction, the water-permeable sheet 1 and the porous urethane resin film 3 are separated, leaving only the porous urethane resin film 3 applied to the skin.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a beauty sheet for beautifying the skin. It also relates to a beauty method using this beauty sheet.

Background Art

[0002] Conventionally, various methods have been used to beautify the skin. For example, in order to conceal spots, freckles, dullness, scars, surgical scars, etc. that have occurred on the skin, foundation is applied. Patent Document 1 describes applying a foundation pigment coating film instead of applying foundation. Specifically, a beauty sheet formed by laminating a film or sheet, a foundation pigment coating film, and an adhesive layer in this order is described (Patent Document 1, paragraphs 0033 and 0038). This beauty sheet is used after the foundation pigment coating film is attached to the skin through the adhesive layer and then the film or sheet is peeled off and removed (Patent Document 1, paragraph 0049). However, when the foundation pigment coating film is attached to the skin using an adhesive, there is a drawback that skin roughness is likely to occur.

[0003] Further, Patent Document 2 describes an invention related to a pseudo-skin film to be attached to the skin in order to make wrinkles and scars that have occurred on the skin less noticeable. This pseudo-skin film is made of porous urethane rubber (Patent Document 2, claims 1 and 3). Also in the case of this pseudo-skin film, it is attached to the skin with an adhesive, and polybutene, polyisobutylene, etc. are used as the adhesive (Patent Document 2, claims 9 and 10 and paragraphs 0044 and 0045). However, since this adhesive is also a rubber-based adhesive, there is a drawback that skin roughness is likely to occur.

[0004]

Patent Document 1

Patent Document 2

Disclosure of the Invention

[0005] The object of the present invention is to provide a cosmetic sheet and a cosmetic method that allows a resin film to be applied to the skin without using an adhesive. [Means for solving the problem]

[0006] The present invention solves the above problems by using a porous urethane resin film containing collagen peptides as the resin film, and by using a beauty sheet in which this porous urethane resin film is bonded to a water-permeable sheet with a water-soluble adhesive. In other words, the present invention relates to a beauty sheet which is laminated and integrated in the order of a water-permeable sheet, a water-soluble adhesive, and a porous urethane resin film for application to the skin, and the porous urethane resin film contains collagen peptides. Furthermore, the present invention relates to a beauty method characterized by applying the porous urethane resin film of this beauty sheet to the skin, then applying water to the water-permeable sheet and allowing it to penetrate, dissolving the water-soluble adhesive, removing the water-permeable sheet, and applying the porous urethane resin film to the skin.

[0007] [Definition of Terms] In this invention, "beauty" refers to actions taken to make the skin look beautiful. Therefore, it includes various actions such as concealing blemishes and other imperfections on the skin, applying beauty ingredients such as moisturizers to the skin to make it moist and produce a beautifying effect, and applying beauty ingredients such as foundation to a porous urethane resin film attached to the skin. The term "skin" refers to the epidermis of the face and body, but also includes lips, eyebrows and other body hair, and nails.

[0008] The beauty sheet according to the present invention is formed by laminating and integrating a water-permeable sheet 1, a water-soluble adhesive 2, and a porous urethane resin film 3 in that order. The water-permeable sheet 1 can be any material that water can penetrate. Specifically, paper or nonwoven fabric can be used. In the present invention, it is particularly preferable to use paper with a thickness of 50 to 100 μm, and most preferably paper with a thickness of 75 μm. If the thickness is less than 50 μm, the paper tends to tear easily when water is absorbed and removed. Also, if the thickness exceeds 100 μm, it becomes highly rigid, reducing its conformability, and it becomes difficult to neatly adhere the porous urethane resin film to the skin.

[0009] A water-soluble adhesive 2 is applied to the permeable sheet 1, forming a layer. Any water-soluble adhesive 2 can be used as the water-soluble adhesive 2. Specifically, starch, polyvinyl alcohol, or polyvinyl acetate can be used individually or in combination. The thickness of the water-soluble adhesive 2 layer is preferably 7 to 15 μm, and most preferably 10 μm. If the layer thickness is 7 μm or less, the permeable sheet 1 tends to slide poorly when removed in the surface direction. If the layer thickness exceeds 15 μm, adhesive components tend to remain on the porous urethane resin film 3 after the permeable sheet 1 is removed, leading to a tendency for stickiness.

[0010] The porous urethane resin film 3 contains collagen peptides. Collagen peptides are collagen that has been treated with enzymes or other means to reduce its molecular weight. When applied to the skin, they are said to penetrate the epidermis and provide a skin-beautifying effect. In this invention, it is particularly preferable to use collagen peptides with a weight-average molecular weight of 400 to 10,000, and most preferably collagen peptides with a weight-average molecular weight of 2,000 or less. This is because collagen peptides with a weight-average molecular weight of this magnitude have a low odor, are well-suited to the skin, and penetrate easily. The weight-average molecular weight of the collagen peptides is measured by the GMJ method (https: / / www.gmj.or.jp / topics / 201215 / 201215.pdf).

[0011] It is preferable that the collagen peptide is contained in the porous urethane resin membrane 3 in powder form. This is because it is easier to dissolve and penetrate the epidermis of the skin when it is in powder form. The amount of collagen peptide in the porous urethane resin membrane 3 is arbitrary, but preferably urethane resin:collagen peptide = 100:30~100 (parts by weight). If the amount of collagen peptide is less than 30 parts by weight, the collagen peptide tends to be encapsulated in the urethane resin and becomes difficult to dissolve. On the other hand, if the amount of collagen peptide exceeds 100 parts by weight, it becomes difficult to form the porous urethane resin membrane 3, and the strength of the porous urethane resin membrane 3 decreases, making it prone to tearing.

[0012] The porous urethane resin film 3 is generally transparent, but it can be colored by incorporating dyes or pigments. Applying a transparent porous urethane resin film 3 provides cosmetic effects to the application area while being discreet to others. Furthermore, coloring the porous urethane resin film 3 allows it to be applied over blemishes or birthmarks to conceal them while providing cosmetic effects. Additionally, the porous urethane resin film 3 is elastic, allowing it to conform well to skin stretching and minimizing discomfort during application. While the thickness of the porous urethane resin film 3 is arbitrary, a thickness of 10-25 μm is preferable from the viewpoint of adhesion and conformability to the skin. If the thickness of the porous urethane resin film 3 is less than 10 μm, it tends to have low strength and be easily torn. On the other hand, if the thickness of the porous urethane resin film 3 exceeds 25 μm, it tends to have reduced adhesion and conformability to the skin. Also, in the case of a transparent porous urethane resin film 3, the transparency decreases, the texture changes, and it becomes easier for others to notice that it is applied.

[0013] The porous urethane resin film 3 has through-holes, through which water, water vapor, and air are supplied to the skin. Therefore, the size of the through-holes only needs to be sufficient for water, water vapor, and air to pass through, thereby preventing skin irritation and rashes even when the porous urethane resin film 3 is applied to the skin for a long time. Generally, the size of the through-holes is preferably in the range of 3 to 20 μm. If the size of the through-holes is less than 3 μm, water will not penetrate easily, and collagen peptides will not elute easily. On the other hand, if the size of the through-holes exceeds 20 μm, collagen peptides will tend to elute in large quantities initially, and will not elute gradually. The size of the through-holes is determined by taking SEM images of the surface of the porous urethane resin film 3. If the pores are circular, their diameter is used as the size of the through-holes; if the pores are irregular in shape, the maximum value of their width is used as the size of the through-holes.

[0014] The porous urethane resin film 3 can be obtained by any known method. For example, a porous urethane resin film 3 can be obtained by applying a urethane mixture (W / O type emulsion polyurethane solution) prepared by adding water to a known oily urethane paint to emulsify it uniformly and adding collagen peptides to it, to the release-treated surface of a synthetic resin film such as a release-treated polyester film, and then drying it. During drying, the water in the urethane mixture evaporates, forming through-holes in the porous urethane resin film 3. Various functions may be imparted to this urethane mixture by adding cosmetic ingredients other than dyes, pigments, and collagen peptides, or additives depending on the purpose. Examples of additives include cellulose nanofibers or sucrose esters, which may be used to further improve the strength of the porous urethane resin film or to further improve its adhesion to the skin.

[0015] It is preferable that a protective sheet 4 is attached to the porous urethane resin film 3. By attaching the protective sheet 4, deterioration or damage to the porous urethane resin film 3 can be prevented during handling and storage of the beauty sheet. Generally, the protective sheet 4 is made of a release-treated synthetic resin film that was used when manufacturing the porous urethane resin film 3.

[0016] A preferred method for manufacturing the beauty sheet according to the present invention is as follows: The above-mentioned urethane mixture is applied to a predetermined area of ​​a release-treated polyester film to be used as a protective sheet 4, and then dried to obtain a porous urethane resin film 3. Then, a water-permeable sheet 1 to which a water-soluble adhesive 2 has been applied is used to laminate the sheets so that the water-soluble adhesive 2 is in contact with the porous urethane resin film 3, and the sheets are pressed with a heated roll heated to a surface temperature of 100 to 120°C to obtain a beauty sheet in which the water-permeable sheet 1, water-soluble adhesive 2, porous urethane resin film 3, and protective sheet 4 are laminated and integrated in that order.

[0017] The beauty method using the beauty sheet according to the present invention is as follows. First, the protective sheet 4 is peeled off the beauty sheet (Figure 2). Next, preferably, water is sprayed onto the skin to which the beauty sheet will be applied (Figure 3). Applying water to the skin beforehand is preferable because it makes it easier for the porous urethane resin film 3 to adhere and improves adhesion. This water may be distilled water or tap water, or an aqueous solution such as a lotion containing beauty ingredients. After this, the porous urethane resin film 3 is applied to the skin so that it is in contact with the skin (Figure 4). After application, water is sprayed onto the permeable sheet 1 (Figure 5). This water may also be distilled water or tap water, or an aqueous solution such as a lotion. After applying water to the permeable sheet 1, the permeable sheet 1 is lightly pressed with a finger to allow the water to penetrate thoroughly (Figure 6). This dissolves the water-soluble adhesive 2 present between the permeable sheet 1 and the porous urethane resin film 3. In this state, when the permeable sheet 1 is slid in the direction of the surface (Figure 7), the water-soluble adhesive 2 dissolves, and only the permeable sheet 1 separates, leaving the porous urethane resin film 3 attached to the skin. When the permeable sheet 1 is completely removed, the skin is attached to the porous urethane resin film 3 (Figure 8). If this state is maintained for a long time, the collagen peptide will penetrate the skin and exert its cosmetic effects.

[0018] Even with the porous urethane resin film 3 attached, the beauty method according to the present invention provides a skin-beautifying effect. However, the beauty effect can be further enhanced by applying cosmetics such as foundation onto the attached porous urethane resin film 3. Alternatively, an image can be drawn on the attached porous urethane resin film 3 to create a tattoo, adding a fashionable element. [Effects of the Invention]

[0019] The beauty sheet according to the present invention is formed by laminating and integrating a water-permeable sheet, a water-soluble adhesive, and a porous urethane resin film containing collagen peptide in this order. Therefore, it has good compatibility with the skin and the porous urethane resin film adheres well to the skin. And in this state, when water is allowed to penetrate into the water-permeable sheet to dissolve the water-soluble adhesive, the porous urethane resin film adhering to the skin and the water-permeable sheet are separated, and only the porous urethane resin film can be pasted on the skin. That is, the beauty sheet according to the present invention can paste the porous urethane resin film on the skin without using an adhesive, and thus has the effect of preventing rough skin.

Example

[0020] The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to these examples.

[0021] Example 1 The following steps 1 and 2 were carried out to obtain a beauty sheet formed by laminating and integrating a porous urethane resin film containing collagen peptide, starch, and paper in this order on the release-treated surface of a release-treated polyester film.

[0022] [Step 1] 15 parts by weight of a polyurethane solution of a W / O emulsion (solid content: 20% by weight), 3 parts by weight of a collagen peptide powder having a weight average molecular weight of 500, and 20 parts by weight of methyl ethyl ketone as a diluent were mixed to obtain a urethane mixture. This urethane mixture was applied to the release-treated surface of the release-treated polyester film using a film applicator, and then dried at 120 ° C. to form a porous urethane resin film (thickness: 20 μm) containing collagen peptide.

[0023] [Step 2] On the back surface of a 100-μm thick paper having a 10-μm thick starch layer on the inner surface, a porous urethane resin film obtained in Step 1 was laminated so as to be in contact therewith, and a laminate was obtained in which a polyester film, a porous urethane resin film containing a collagen peptide, starch, and paper were laminated in this order. By pressing this laminate with a heating roll heated to a surface temperature of 120°C, a beauty sheet was obtained integrally.

[0024] Example 2 A beauty sheet was obtained in the same manner as in Example 1, except that 0.25 parts by weight of cellulose nanofibers and 3 parts by weight of sucrose ester were added to the urethane mixture used in Step 1 of Example 1.

[0025] (Use of beauty sheet) The beauty sheets obtained in Example 1 and Example 2 above were used as follows, and were attached to the skin of the arm. First, the release-treated polyester film (protective sheet) was peeled off as shown in Figure 2, and the porous urethane resin film containing a collagen peptide was placed on the arm so as to directly contact the skin. Then, as shown in Figures 5 and 6, water was appropriately infiltrated from above the paper, which is a water-permeable sheet, to dissolve the starch, which is a water-soluble adhesive. Then, as shown in Figure 7, the paper was slid in a direction parallel to the paper surface and removed.

[0026] (Evaluation of beauty sheet) When the beauty sheets obtained in Example 1 and Example 2 were used by the above method, a porous urethane resin film with good compatibility between the skin and the collagen peptide and good adhesion to the skin as shown in Figure 8 was obtained. Also, the beauty sheet obtained in Example 2 had improved adhesion to the skin compared to that of Example 1. When the beauty sheets obtained in Example 1 and Example 2 were attached to the skin and after 2 hours had passed, the porous urethane resin film was removed from the skin, and no adhesive residue or skin roughness was observed. Also, since the beauty sheet obtained in Example 2 had improved strength of the porous urethane resin film compared to that of Example 1, it was less likely to break and was easily removable when removed from the skin.

Brief description of the drawings

[0027] [Figure 1] This is a side view of a beauty sheet according to an example of the present invention. [Figure 2] This is a photograph showing the process of peeling a protective sheet from a beauty sheet according to an example of the present invention. [Figure 3] This is a photograph showing water being sprayed onto the skin where a porous urethane resin film has been applied. [Figure 4] This is a photograph of a cosmetic sheet with the protective sheet removed and applied to the skin. [Figure 5] This is a photograph showing water being sprayed onto the permeable sheet of the applied beauty sheet. [Figure 6] This photo shows the permeable sheet being held down with a finger to allow the sprayed water to penetrate it. [Figure 7] This photograph shows the permeable sheet being slid in the planar direction, separating from the porous urethane resin membrane. [Figure 8] This photograph shows the state after the permeable sheet has been completely removed and the porous urethane resin film has been applied to the skin. [Explanation of symbols]

[0028] 1. Permeable sheet 2. Water-soluble adhesive 3. Porous urethane resin membrane 4. Protective film

Claims

1. A beauty sheet comprising a water-permeable sheet, a water-soluble adhesive, and a porous urethane resin film for application to the skin, laminated and integrated in that order, wherein the porous urethane resin film contains collagen peptides.

2. The beauty sheet according to claim 1, wherein the water-permeable sheet is made of paper.

3. The beauty sheet according to claim 1, wherein the water-soluble adhesive is one or more selected from the group consisting of starch, polyvinyl alcohol, and polyvinyl acetate.

4. The beauty sheet according to claim 1, wherein the collagen peptide is in powder form.

5. The beauty sheet according to claim 1, wherein the weight-average molecular weight of the collagen peptide is 400 to 10,000.

6. The beauty sheet according to claim 1, wherein a protective sheet is laminated on a porous urethane resin film.

7. A beauty method characterized by applying the porous urethane resin film of the beauty sheet described in claim 1 to the skin, then applying water to the water-permeable sheet and allowing it to penetrate, dissolving the water-soluble adhesive, removing the water-permeable sheet, and then applying the porous urethane resin film to the skin.

8. The cosmetic method according to claim 7, wherein water is applied to the skin before the porous urethane resin film is applied to the skin.

9. The beauty method according to claim 7, wherein when removing the permeable sheet, the sheet is slid in the direction of the surface.

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