JP2016079409A - Silicon adhesive cosmetic sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new cosmetic sheet by activating the characteristics of a silicon adhesive capable of long time pasting.SOLUTION: Provided is a silicon adhesive sheet using a silicon adhesive cross-linked and also having a probe tack value of 0.3 N/10 mmφ or higher. The silicon adhesive sheet preferably has a thickness of 20 μm to 1 mm. The silicon adhesive is cross-linked so as to control the probe tack value to 0.3N/10 mmφ or more. The fracture elongation degree of the cosmetic sheet is preferably 50% or more. The silicon adhesive can include a cosmetic valuable component therein. Further, the silicon adhesive sheet preferably uses a polyurethane sheet as a supporting body.

Description

The present invention relates to a beauty sheet using a silicon adhesive and a method for producing the same.

Most of the commercial beauty sheets for moisturizing the skin are soaked with a cosmetic liquid in non-woven fabric, and some hydrogel type products exist. Since non-woven fabrics have very high water absorption, when a non-woven sheet pack in which a cosmetic liquid is soaked in a non-woven fabric is applied, moisture moves from the skin to the non-woven fabric, and moisture evaporates from the non-woven fabric after a long time. The sheet pack is peeled off from the skin.
Since the hydrogel is hydrophilic, the solubility of the oil-soluble valuable material is poor, and the oil-soluble valuable material cannot be sufficiently contained. On the other hand, the oil gel is excellent in the solubility of oil-soluble valuables, but is inconvenient for long-term skin application because the solubility of water-soluble valuables is poor and the water vapor permeability is low.

As the skin ages, the skin becomes dull and sagging of the face becomes a problem. For this reason, gel-like cosmetics that are known for their facial lift-up effects are on the market. Many of them aim to lift up by applying their own massage after applying the face, but it takes time and is difficult to realize the effect.
An adhesive tape in which an adhesive is applied on a transparent support is known for face lift-up. For example, there is a tape having a total thickness of 10 to 30 μm by a combination of a urethane film support and an adhesive. In use, one end of the tape is applied to the local area of the face and the other end is applied while the other end is pulled, and the sagging portion of the skin is pulled up and lifted up. However, these do not give a moist or firm feeling.

Acrylic adhesives and rubber adhesives are often used for beauty sheets. These pressure-sensitive adhesives have poor water vapor permeability and gas permeability, and have the disadvantages that, when applied to the face for a long time, the face feels tired and sweat accumulates. For this reason, it is very difficult in practice to use these pressure-sensitive adhesives to form a sheet that covers the entire face.

In contrast, the silicone adhesive sheet is resistant to temperature changes and is hypoallergenic, and easily adheres to uneven parts such as limbs, so that it can be used as an external skin preparation in the medical field for the treatment of keloids and wounds. It is used. In particular, silicone adhesives are more water vapor permeable than rubber and acrylic adhesives, so there is less stuffiness when applied to the skin and less burden on the skin even if applied for a long time. It is a feature.

Several sheet-like cosmetics using silicon resin have been reported (Patent Documents 1 to 3). The silicon sheet of Patent Document 1 is characterized by containing gold powder, is strongly cross-linked, has no adhesiveness to the skin, and can be repeatedly used by washing with water. Patent Document 2 discloses a cosmetic using static electricity discharged from a silicon resin having a predetermined temperature and humidity. Patent Document 3 is an external preparation for skin that combines silicon and a sheet having a negative electrostatic potential. These silicon sheets are cross-linked at high density and are therefore not sticky as sheets. The adhesive silicon sheet of the present invention is technically different.

Several medical or cosmetic sheets using a silicone adhesive have also been reported (Patent Documents 4 to 6). It is described that the pressure-sensitive adhesive tape of Patent Document 4 is for external use on the skin and can contain valuable materials in the pressure-sensitive adhesive layer. The percutaneous pad of Patent Document 5 describes that the pad is provided with a large number of through-holes in order to improve air permeability, and that the adhesive layer can contain valuable materials. The silicon sheet of Patent Document 6 is a reservoir-type preparation having a three-layer structure in which an outer layer film and a silicon adhesive layer are laminated on an active ingredient layer, but the production method is complicated.

JP 2006-265105 A JP-A-10-295828 JP-A-2005-29526 JP-A-3-68672 JP 2006-131812 A Special table 2013-502419

The present invention is a new technique that takes advantage of the characteristics of a silicone adhesive that can be applied for a long period of time so that the valuable ingredients contained in the beauty sheet can sufficiently penetrate into the skin, while exhibiting a face lift-up effect and a moisturizing effect. The purpose is to provide a beauty sheet.

The silicon pressure-sensitive adhesive sheet of the present invention is characterized by using a silicon pressure-sensitive adhesive which is cross-linked and has a probe tack value of 0.3 N / 10 mmφ or more.
The unit N / 10 mmφ of the probe tack value is a value obtained by using N as a unit using a circular sample having a diameter of 10 mm.

The present invention relates to a new cosmetic sheet that uses a silicone pressure-sensitive adhesive sheet to give a lift-up effect, a moist feeling, and a firm feeling, and relates to a beauty sheet that has never existed until now.
Silicone adhesive has high gas permeability and water vapor permeability. Therefore, even if the beauty sheet using the silicone adhesive is a large all-face type, even if it is applied to the face for a long time, it does not stuffy, and it does not feel tired or stuffy gently on the skin.

The thickness of the silicon layer in the present silicone pressure-sensitive adhesive sheet needs to be 20 μm or more, and preferably 1 mm or less. When the thickness is 20 μm or less, the tensile stress applied to the face is too weak and the lift-up effect is insufficient. When the thickness is 1 mm or more, gas permeation and water vapor permeation are hindered and a feeling of sultry occurs.

The present silicone pressure-sensitive adhesive sheet can be used as a single sheet, but it is more convenient to handle by applying it on a thin flexible support. As the flexible support, it is preferable to select a material having excellent flexibility and stretchability, such as a silicon cured film and a polyurethane film, and having a high moisture and gas permeability. In particular, a polyurethane support is desirable to enhance the lift-up effect. The thickness of the polyurethane film support is preferably 15 μm or less. In addition to these, a flexible non-woven fabric or woven fabric having a high water vapor permeability can also be used.

The present silicone pressure-sensitive adhesive sheet has good adhesion to the face and can therefore be applied to the face for a long time. There has never been such a facial beauty sheet that can be applied for a long time. If the adhesion to the face is poor, it will stick to the face and give it a lift-up feeling, but the stretch will shrink or peel off from the face in a short time, making it difficult to bring up the face lift-up feeling. Therefore, the adhesiveness of the silicon-based pressure-sensitive adhesive sheet is important for defining the present invention.
It is considered appropriate to use the probe tack value for quantitative evaluation of the tackiness. The probe tack value must be 0.3 N / 10 mmφ or more. If the probe tack value is 0.2 N / 10 mmφ or less, even if affixed to the face, the elongation will shrink in a short time or it will peel off from the face, making it impossible to apply the skin for a long time. Inappropriate for expression of up effect.

In order to increase the adhesiveness of the silicon adhesive sheet (increase the probe tack value), the crosslinking density of the silicon resin that is the main material of the sheet may be decreased. The crosslink density of the silicon resin depends on the addition amount of the curing agent.
If the crosslink density is too low, the probe tack value may increase, but the non-gelled portion increases, and cohesive failure at the time of sheet peeling based on a decrease in mechanical properties tends to occur. Then, an adhesive residue is likely to occur when peeling off after application to the skin, making it unsuitable as a beauty sheet. The absence of adhesive residue is an essential property of a beauty sheet.
Therefore, in order to define the physical properties of the silicon pressure-sensitive adhesive sheet of the present invention, the minimum value of the probe tack value may be specified. This is because the probe tack value is preferably as large as possible if it can be increased while avoiding adhesive residue. Nevertheless, if the gel fraction becomes too small, adhesive residue is generated, so the practical upper limit of the probe tack value is 2.0 N / 10 mmφ.

In order to exert a lift-up effect, it is necessary to stably adhere to the face in a pulled state in order to pull and fix it on the face. For this reason, extensibility as well as adhesiveness is indispensable for a beauty sheet. If a sheet with poor extensibility is pulled, it will break, and a lift-up effect cannot be achieved. The beauty sheet needs to be stretchable to the extent that it does not break when stretched 50%, and more preferably it does not break when stretched 100%.

In order to actually produce a silicon pressure-sensitive adhesive sheet having appropriate tackiness and extensibility, it is produced by appropriately crosslinking a raw material silicon resin. In the cross-linking of the silicon resin, the non-cross-linked silicon resin is loosely cross-linked by an addition curing reaction or a radical curing reaction to adjust the adhesiveness and holding power. Both radical crosslinking reactions using organic peroxides or addition crosslinking reactions using platinum complexes serve the purpose of the present invention. If the crosslinking reaction is excessive, the tackiness is reduced, and if the crosslinking is insufficient, the tackiness is increased, but the holding power is weak and causes cohesive failure (adhesive residue), which is not practical. As for tackiness imparting by crosslinking, the degree of crosslinking is adjusted using the probe tack value as a parameter.

In the present silicone adhesive sheet, an appropriate amount of silicon oil may be mixed in addition to the raw silicon resin. Silicone oil plays a plasticizer role without being involved in crosslinking. The amount of silicon oil is desirably 200 parts by weight or less with respect to 100 parts by weight of the raw material silicon resin. If the amount is too large, the tensile strength and mechanical properties are weakened, which is inappropriate.

The adhesive sheet of the present invention may contain valuable cosmetic ingredients. If silicone cosmetics are impregnated with various cosmetic valuable components, the valuable components diffuse into the skin when the cosmetic sheet is applied to the face. When cosmetic valuable ingredients are lipophilic, they dissolve well in silicone adhesives. If it is hydrophilic, it may be dispersed uniformly, or may be dissolved or dispersed in a hydrophilic medium such as butylene glycol or PEG and dispersed in a silicone adhesive.

Although it is not particularly limited as a physiologically active ingredient in cosmetics valuable ingredients, it eliminates skin troubles such as acne, spots, freckles, pigmentation drying after sunburn, wrinkles, alopecia, dullness, bear, rough skin, cellulite and fat deposits Ingredients to maintain skin and prevent or ameliorate skin diseases such as atopic dermatitis, senile xerosis, childhood dry eczema, keratosis, ringworm, whitening, anti-wrinkle, anti-inflammatory Ingredients, blood circulation promoting ingredients, moisturizing ingredients, antibacterial ingredients, anti-pruritic ingredients, vitamins, antioxidant ingredients, cell activation ingredients, antiallergic ingredients, etc. can be used, and these ingredients can be used alone or in combination good.

Examples of the whitening component include, but are not limited to, for example, ascorbic acid phosphate magnesium salt, ascorbic acid glucoside and salts thereof and acylated derivatives, vitamin C derivatives such as ascorbyl palmitate, α-arbutin, β-arbutin, kojic acid, Examples include placenta extract and cysteine.

The anti-wrinkle component is not particularly limited, and examples thereof include retinoids such as retinol, retinoic acid, retinol acetate, and retinol palmitate, α-hydroxy acids such as citric acid, fruit acid, glycolic acid, and lactic acid, and boxweed extract. It is done. Although it does not specifically limit as an anti-inflammatory component, For example, glycyrrhetic acid, allantoin, etc. are mention | raise | lifted.

The blood circulation promoting component is not particularly limited. γ-aminobutyric acid, schertinogen, carpronium chloride, minoxidil, and the like.
The moisturizing component is not particularly limited, and examples thereof include NMF components such as butylene glycol, propylene glycol, dipropylene glycol, urea and amino acids, heparin, hyaluronic acid, chondroitin sulfate, and chitin.

The antibacterial component is not particularly limited, and examples thereof include isopropylmethylphenol, triclosan, triclocarban, glycyrrhizic acids, menthol, camphor, rosemary oil, capsaicin, nonanoic acid vanillylamide, dibucaine and the like.

Vitamins are not particularly limited. For example, oil-soluble vitamins include vitamin A oil, liver oil, retinol acetate, retinol palmitate, retinol, dehydroretinol, vitamin A3, retinoic acid, vitamin D, vitamin D2 (ergocalciferol) ), Vitamin D3 (cholecalciferol), vitamin derivatives, vitamin E (tocopherol), dl-α-tocopherol acetate, dl-α-tocopherol, tocopherol butyrate, tocopherol nicotinate, benzyl nicotinate, natural vitamin E, vitamin K Vitamin U and other water-soluble vitamins such as vitamin B1 (thyamine), vitamin B2 (riboflavin butyrate), vitamin B6 (pyridoxine dicaprylate, pyridoxine dipalmitate) Fatty acid ester), vitamin B12 (cobalamin), vitamin B13, vitamin B14, vitamin B15 (pangaminic acid), folic acid, carnitine, thioctic acid, pantotenyl alcohol, pantotenyl ethyl ether, pantothenic acid, nicotinic acid, nicotinamide, Examples thereof include choline, inositol, vitamin C (ascorbic acid), ascorbyl stearate, ascorbyl pantothenate, ascorbyl dipalmitate, vitamin H (biotin), and vitamin P (hesperidin).

The antioxidant component is not particularly limited, for example, polyphenols such as anthocyanin, catechin, green tea polyphenol, apple polyphenol, ascorbic acid, sodium ascorbate, sodium ascorbate sulfate, β-carotene, astaxanthin and other carotenoids, tocopherols, Examples include tocopherol acetate, natural vitamin E, tocomonoenol, tocotrienol, β-diketones such as curcumin, and the like.

The antiallergic component is not particularly limited, but for example, glycyrrhetic acid derivatives such as glycyrrhetinic acid and glycyrrhizic acid, licorice, chlorella, comfrey, buttonpi, jujube, sage, perilla, mugwort, and their extracts, tinctures or tinctures The component contained in them is mentioned.

In the silicone pressure-sensitive adhesive sheet of the present invention, surfactants, water-soluble polyhydric alcohols, other conventional additives, preservatives, sequestering agents, antioxidants, astringents, etc. Agents, pigments, dyes, fragrances, ultraviolet absorbers, thickeners, pH adjusters, powders, hormones, keratolytic agents, and the like can be included.

In order to produce the silicone pressure-sensitive adhesive sheet of the present invention, a silicon pressure-sensitive adhesive, a curing agent, and, if necessary, silicone oil and cosmetic valuable ingredients are mixed to form a uniform solution, and the solution is formed on a release film or a support film. Apply by hand or using a coating machine (manufacturing by coating method) and heat to cure. The heating is desirably 130 ° C. or lower. Above this temperature, cosmetic valuable ingredients tend to decompose. Thereafter, a support film or a release film is placed on the silicone adhesive surface.

Since the cosmetic sheet of the present invention uses a silicone adhesive, it does not stuffy even if it is applied to the face for a long time because of its high gas permeability and water vapor permeability. In particular, if the degree of cross-linking is selected and the probe tack value is appropriately set, it is possible to obtain a product having excellent adhesiveness and extensibility as a beauty sheet.

The silicone adhesive sheet of the present invention has the following characteristics as compared with other cosmetic sheets. The oil gel sheet uses a rubber-based adhesive, so its water vapor permeability is very low. Even if it is applied to the face for a short time, moisture condenses on the skin surface, and the application for a long time may cause stuffiness of the skin or rash. Unsuitable. An aqueous facial gel sheet is weak in adhesiveness to the skin, and it is difficult to apply it to the skin and fix it while pulling. If the water evaporates, it will peel off the skin. Since this silicone adhesive sheet has high skin adhesion and high gas permeability, even if this sheet is applied and the skin is pulled and adhered to the skin, it is difficult to return to the original state. There is no feeling of tiredness, discomfort, and stuffiness, so the skin lift-up effect is high.

Further, the cosmetic effect can be enhanced by impregnating the silicone adhesive with valuable cosmetic ingredients.

Hereinafter, embodiments of the present invention will be described based on examples. However, the present invention is not limited to the examples.
(Beauty sheet creation)

Silicone adhesives MG7-9800 (A) and MG7-9800 (B) (Soft Skin Adhesive, Dow Corning Co., Ltd.) are mixed at a weight ratio of 1: 1.2, and a 20 μm thick urethane film (Cosmedy Pharma Co., Ltd.) )) To a thickness of 400 μm, crosslinked by heating at 100 ° C. for 20 minutes, and further continued the crosslinking reaction at 60 ° C. overnight. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.
(How many crosslinkers were used? The probe tack value indicates the degree of crosslinking, and the difference between the examples and comparative examples is the degree of crosslinking. It may be clear)

Silicone adhesives MG7-9800 (A) and MG7-9800 (B) (described above) were mixed at a weight ratio of 1: 1.4, and 0.1% of tocopherol acetate (Nacalai Tesque) was added. A 20 μm-thick urethane film (Cosmedy Pharma Co., Ltd.) was applied to a thickness of 400 μm and crosslinked by heating at 100 ° C. for 20 minutes, and then the crosslinking reaction was continued at 60 ° C. overnight. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet. (How much and how much was used as a crosslinking agent)

100 g of silicone adhesive KE-1151 (Shin-Etsu Silicon Co., Ltd.) and 1 g of dicumyl peroxide (Wako Pure Chemical Industries, Ltd.) were mixed well, and 0.1% of tocopherol acetate (Nacalai Tesque Co., Ltd.) was added. It was applied to a 20 μm-thick urethane film (Cosmedy Pharma Co., Ltd.) to a thickness of 500 μm, and crosslinked by heating at 120 ° C. for 30 minutes. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.

Silicone adhesives MG7-9800 (A) and MG7-9800 (B) (above) are mixed at a weight ratio of 1: 2, and then added to a 50μm fluorine release film (3M Co., Ltd.) to a thickness of 300μm. After coating and heating and crosslinking at 100 ° C. for 20 minutes, the crosslinking reaction was continued at 60 ° C. overnight. The obtained sheet was cut into the shape of a face mask to create a beauty sheet. Since this sheet was removed from the release sheet when used, this sheet consisted only of a silicon adhesive sheet without a support film.
(How much and how much was used as a crosslinking agent)

Weight ratio of silicone adhesive KE-1310ST (one-component RTV rubber, Shin-Etsu Silicon Co., Ltd.), silicone oil (KF-56, Shin-Etsu Silicon Co., Ltd.) and cross-linking agent CAT-1310S (Shin-Etsu Silicon Co., Ltd.) Mix at 100: 50: 1.5, apply to 500μm thick 50μm-thick fluorine release film (3M Co., Ltd.), heat-crosslink at 120 ° C for 20 minutes, and then crosslink at 60 ° C overnight. Continued. The obtained sheet was cut into the shape of a face mask to create a beauty sheet. Similar to the sheet of Example 4, this sheet consisted only of a silicone adhesive sheet without a support film.

Silicone adhesive KE-1310ST and cross-linking agent CAT-1310S (Shin-Etsu Silicon Co., Ltd.) are mixed at a weight ratio of 100: 1.3 and applied to a 20μm thick urethane film (Cosmedy Pharmaceutical Co., Ltd.) to a thickness of 500μm. Then, after crosslinking by heating at 120 ° C. for 20 minutes and further continuing the crosslinking reaction at 60 ° C. overnight, the obtained sheet was cut into the shape of a facial mask to obtain a beauty sheet.

Silicone adhesive KE-1310ST and cross-linking agent CAT-1310S (Shin-Etsu Silicon Co., Ltd.) are mixed at a weight ratio of 100: 0.9 and applied to a 20μm-thick urethane film (Cosmedy Pharma Co., Ltd.) to a thickness of 500μm. Then, after crosslinking by heating at 120 ° C. for 20 minutes, the crosslinking reaction was further continued at 60 ° C. overnight. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.

Silicone adhesive KE-1310ST (Shin-Etsu Silicon Co., Ltd.), Cross-linking agent CAT-1310S (Shin-Etsu Silicon Co., Ltd.) and Silicon Oil (KF-56, Shin-Etsu Silicon Co., Ltd.) in a weight ratio of 100: 0.8: 20 The mixture was mixed and applied to a 20 μm thick urethane film (Cosmedy Pharma Co., Ltd.) to a thickness of 500 μm and heated and crosslinked at 120 ° C. for 20 minutes, and then the crosslinking reaction was continued at 60 ° C. overnight. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.

Comparative Example 1

Silicone adhesive KE-1310ST and crosslinking agent CAT-1310S (Shin-Etsu Silicon Co., Ltd.) in a weight ratio of 100:
After mixing with 0.7 and applying it to a 20μm thick urethane film (Cosmedy Pharma Co., Ltd.) to a thickness of 500μm and heating and crosslinking at 120 ° C for 20 minutes, the crosslinking reaction is continued at 60 ° C overnight. did. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.

Comparative Example 2

Silicone adhesive KE-1151 (Shin-Etsu Silicon Co., Ltd.) 100g and Dicumyl peroxide (Wako Pure Chemicals Co., Ltd.) 4g are mixed well, and thick on a 20μm thick urethane film (Cosmedy Pharmaceutical Co., Ltd.). The film was applied to a thickness of 500 μm and crosslinked by heating at 120 ° C. for 30 minutes. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.

Comparative Example 3

Adhesive hydrogel mask (beauty gel with hydrogel and valuable material soaked in fiber sheet, sold by KODO Co., Ltd.) was used.

Comparative Example 4

100 parts by weight of styrene-isoprene-styrene block copolymer (Clayton Japan Co., Ltd. Clayton D1107, styrene content 30% by weight), 120 parts by weight of liquid paraffin (Nacalai Tech Co., Ltd. chemical reagent) and 0.5 parts by weight of benzoylhydroxytoluene It was put into a kneader and melt kneaded at 140 ° C. to obtain a hot melt pressure-sensitive adhesive molten solution. This molten solution was applied to a PET release sheet to a thickness of 30 μm, and a urethane film having a thickness of 20 μm was laminated. The obtained sheet was cut into the shape of a face mask to obtain a beauty sheet.
(Beauty sheet evaluation method)

As a physical property evaluation test of a beauty sheet, a probe tack test was performed in order to see instantaneous adhesive force. For this test, a tensile compression tester SV-52N-50 manufactured by Imada Seisakusho was used. Using a cylindrical probe having a diameter of 10 mm and a weight of 106 g, the pressure (N) at the time of peeling was determined by ascending peeling at a speed of 50 mm / min after pressing on the sample for 20 seconds. Therefore, the probe tack value obtained in this test is for a sample having a diameter of 10 mm, and its unit is N / 10 mmφ.

An elongation test was performed as a physical property evaluation test of a beauty sheet. The tensile tester SV-52N-50 manufactured by Imada Seisakusho was also used for the extensibility test. A sample film was molded to 1 cm x 5 cm, and the 1 cm portions at both ends were held by a testing machine, pulled up to 50% elongation (4.5 cm) at a speed of 100 mm / min, and the presence or absence of breakage of the sample at that time was examined. . The degree of elongation at break is a numerical value indicating how much the original length is increased when the film is broken, and is preferably 50% or more.

As a performance evaluation test of a beauty sheet, the effect and usability as a pack were evaluated. After applying the beauty sheet formed as described above to the face of four female subjects with the upper body raised and evaluating the adhesion and stuffiness when left standing for 20 minutes, and after peeling off after 20 minutes The lift-up feeling and moisturizing feeling of the skin condition are expressed in the following 1 to 5 levels, evaluated as usability and effect as a pack agent, and evaluated with scores in each item of all subjects As a result. Therefore, the values of these evaluations indicate the magnitude of performance and effect. A test product with an evaluation result of 2 or 1 even with one item fails. The results are shown in Table 1.

Evaluation of effect feeling, especially lift-up feeling was performed as follows.
5: I feel that my skin is significantly lifted up.
4: I feel my skin is lifted up.
3: The skin feels slightly lifted up.
2: I feel that my skin has been lifted slightly.
1: The effect is not felt.

Evaluation of effect feeling, especially moisturizing feeling was performed as follows.
5: I feel that the skin is remarkably moisturized.
4: I feel that the skin is moisturized.
3: The skin feels slightly moisturized.
2: The skin feels slightly moisturized.
1: The effect is not felt.

Evaluation of usability, particularly steamability, was performed as follows.
5: There is no stuffiness.
4: Slightly stuffy.
3: Slightly steamy.
2: There is much stuffiness.
1: It is very uncomfortable with a lot of stuffiness.

Usability, in particular, adhesion was evaluated as follows.
5: The skin is completely adhered and there is no deviation.
4: Almost in close contact with the skin, with little deviation.
3: There is a part that is not in close contact with the skin, and there is a slight deviation.
2: It is difficult to adhere to the skin and there are many deviations.
1: The displacement falls greatly.

The evaluation results are summarized in Table 1.

(Table 1) Summary of evaluation results

The cohesive failure means that the pressure-sensitive adhesive is attached to the probe, that is, exhibits a so-called adhesive residue phenomenon. In this case, no other measurement was performed as a nonconforming product. In Comparative Examples 1 and 2, the thickness was appropriate, but the chemical composition was inappropriate and the desired physical properties could not be obtained.

Claims (6)

A silicone adhesive sheet using a silicone adhesive that is crosslinked and has a probe tack value of 0.3 N / 10 mmφ or more. The silicon adhesive sheet according to claim 1, which has a thickness of 20 µm to 1 mm. The beauty sheet according to claim 1 or 2, wherein the silicone adhesive contains silicone oil. The beauty sheet according to any one of claims 1 to 3, wherein the silicone adhesive sheet has an elongation at break of 50% or more. The cosmetic sheet according to any one of claims 1 to 4, characterized in that a cosmetic valuable component is contained in the silicone adhesive. The beauty sheet according to any one of claims 1 to 5, wherein the support is a polyurethane sheet.