JP2001335427A - Sheet-shaped cosmetic and cosmetic method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet-shaped cosmetic having increased tightening effect on the skin and freely corresponding to the sizes of parts such as a face and the like, which have large individual differences. SOLUTION: The sheet-shaped cosmetic consists of a stretchable sheet-shaped preparation and can be used while stretching in a constant direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a stretchable sheet-form preparation which is used while being stretched in a certain direction, thereby enhancing the skin tightening effect, and changing the stretching ratio at the time of use to make individual differences such as the face. The present invention relates to a sheet-shaped cosmetic and a cosmetic method characterized by being able to freely cope with the size of a part having a large size.

[0002]

2. Description of the Related Art Conventionally, a haptic type sheet cosmetic in which a nonwoven fabric or a woven fabric is coated with a plaster, or an impregnated sheet cosmetic in which a nonwoven fabric or a woven fabric is impregnated with a lotion-like serum is known. ing. Since these sheet-like cosmetics form a preparation using a material having excellent shape stability such as nonwoven fabric or paper as a support, the size and shape of the cut support are maintained during application. . And like the face,
In order to obtain a product that is suitable for a part having a large individual difference such as the size of the face, the height of the nose, and the position of the eyes, it is necessary to design the shape using the statistical average value of each dimension.

[0003]

However, in practice, this average value includes a large error. For example, a shape that is too large for a person with a small face is too small for a person with a large face. However, there is a problem that this occurs at a considerably high rate.

[0004]

Means for Solving the Problems The present inventors have made intensive studies in view of these problems, and found that they are stretchable sheet-like preparations, which can be used while being stretched in a certain direction. It was found that the development of the camera allows the user to use it while stretching it into a shape that is well suited to the shape of the user's face, etc. at the time of use, and solves problems due to individual differences in the size and shape of the face. Furthermore, they found that by using the sheet-form preparation while stretching it, a relatively strong tightening feeling of the skin was obtained after use, and thus completed the present invention.

That is, a first aspect of the present invention is a sheet-shaped cosmetic preparation which is a stretchable sheet-shaped preparation, which can be used while being stretched in a certain direction.

A second aspect of the present invention is the above-mentioned sheet-like cosmetic, wherein the stretching ratio is in the range of 5 to 300% of the original size of the sheet-like preparation.

[0007] A third aspect of the present invention is the above-mentioned sheet-like cosmetic, wherein the stretching ratio is in the range of 10 to 100% with respect to the original size of the sheet-like preparation.

[0008] A fourth aspect of the present invention is the above-mentioned sheet-like cosmetic, wherein the elastic sheet-like preparation has a facial shape, and is cut or punched into the eyes, nose and mouth. is there.

A fifth aspect of the present invention is the above-mentioned sheet cosmetic, wherein the appearance of the elastic sheet-like preparation is transparent or translucent.

[0010] A sixth aspect of the present invention is the above-mentioned sheet, characterized in that a woven or nonwoven fabric having a sufficiently large aperture ratio is embedded or laminated in the thickness direction inside or on the surface of the stretchable sheet-like preparation. In cosmetics.

A seventh aspect of the present invention is the above-mentioned sheet-like cosmetic, wherein a water-containing solution layer is provided on the surface of the stretchable sheet-like preparation.

An eighth aspect of the present invention is to use a stretchable sheet-like preparation for the face while stretching it in a certain direction.
The above-mentioned sheet-like cosmetic is characterized in that it can cope with differences in the size of the face with individual differences.

According to a ninth aspect of the present invention, in a stretchable sheet-like preparation for the face, the positions of cuts or punches provided in the eyes, nose, and mouth are determined by the ratio of stretching the sheet-like preparation to the eyes, nose, and mouth. The above-mentioned sheet-like cosmetic is characterized in that it is calculated from the average position.

[0014] A tenth aspect of the present invention is a cosmetic method characterized in that the skin tightening effect is enhanced by using a stretchable sheet-like preparation while stretching it in a certain direction.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The sheet-like cosmetic of the present invention is a stretchable sheet-like preparation, and can be used while being stretched in a certain direction. For example, in the case of an elastic full-face sheet cosmetic in which the eyes, nose, and mouth are punched out, as shown in the left diagram of FIG. And stick it to your face as shown in the figure on the right. Note that the present invention is not limited to the shape and size, the stretching direction, and the like shown in FIG. In the present invention, the stretching ratio is in the range of 5 to 300% of the original size of the sheet-shaped preparation, that is, the original size is 10%.
If it is 0, it is preferably in the range of 105 to 400, and more preferably in the range of 10 to 100% of the original size. If it is in this range, it is easy to use and a firm skin feeling can be obtained. If it exceeds 300%, even if it is for the body such as the abdomen, the feeling of adhesion to the skin is lowered, which is not preferable.

The elastic sheet-like preparation used in the present invention is preferable because its appearance is transparent or translucent, it is easy to stick to a predetermined position on the skin, and the effect of improving the skin at the time of sticking can be confirmed. Furthermore, if a woven or nonwoven fabric having a sufficiently large opening ratio is present or laminated in the thickness direction inside or on the surface of the stretchable sheet-like preparation, the strength at the time of stretching can be increased, and the stretchability is also imparted. It is preferable because transparency can be obtained. If the aperture ratio is low, there is a problem that elasticity cannot be obtained. Further, if a knitted or woven fabric having a sufficiently large aperture ratio is present or laminated in the thickness direction, the sheet is prevented from breaking or being locally stretched when stretched. Here, transparent or translucent means that when a sheet-like preparation is attached to white paper with a black line (width 2 mm), the black line can be clearly recognized as transparent, and the vaguely recognized line can be translucent. Judgment is made based on criteria that make unrecognizable objects opaque. Also,
The knitted fabric or nonwoven fabric having a large aperture ratio as described above means a material having a wide aperture ratio (transparency is maintained) such that a 10-point type can be read even through a knitted fabric or nonwoven fabric. For example, a mesh made of nylon or polyester is preferably used.

The elastic sheet-like preparation used in the present invention comprises:
Can be used on different parts of the body. For example, face,
Arms, legs, hands, neck, chest, belly, back, etc. Of these, especially the face (all faces, eyes, mouth, forehead, cheeks, chin,
It is preferably applied to the nose, the outer corner of the eyes, the eyes), the neck, the legs, and the abdomen. In this part, there is an advantage that the tightening feeling of the skin can be easily realized compared to other parts.

When the elastic sheet-like preparation used in the present invention is in the form of a face (full face type), it is preferable that the eyes, nose and mouth are cut or punched. It is preferable that the positions of the cuts or punches provided in the eyes, nose, and mouth are calculated from the stretching ratio of the sheet-form preparation and the average positions of the eyes, nose, and mouth. In this case, there is an advantage that it is possible to easily cope with a difference in the size of the face having individual differences. As the calculation method, for example, the average value of the ethnicity of the height of the nose, the position of the eyes, the position of the mouth, and the size of the face in the lateral direction is obtained, and n0, e
0, m0, and L0. The average value of the size of the eyes in the lateral direction and the size of the mouth is e1 and m1. Next, it is assumed that the stretching ratio of the stretchable sheet-form preparation is A (%) with respect to the original size of the sheet-form preparation. Then, the original dimension (maximum width) in the lateral direction of the sheet-form preparation is L0 × 100 ÷ (100+
A). (However, L0 is the maximum value in the horizontal direction.)
Considering the position of the eyes based on the position from the center line of the face (based on the center line of the nose), [(e0 ± e1 ±)
2) + (n0 ÷ 2)] × [100 ÷ (100 + A)], with some margin left and right (preferably 5 to 5)
15 mm) is preferably installed.
Similarly, the position of the mouth is 0 to (m0 ÷ 2) × [10
0 (100 + A)]. These positions naturally change according to the respective coefficients when the race changes. On the other hand, in the vertical direction, it is preferable to use a value calculated from the respective positional relations and adding a margin value to the value. These allowances correspond to the fact that the elongation percentage of the sheet-form preparation may not actually be constant in some parts. For all face sheets,
If the nose is covered with a sheet, it may be difficult to breathe. Therefore, it is preferable that a concave notch is provided at a position below the nose so as to go around the nose. In this case, there is also a merit that alignment is easy when using a sheet-form preparation.

The details of the production examples of the elastic sheet-form preparation used in the present invention are shown below.

The proportion of water in the gel cosmetic part (hereinafter referred to as a gel body) containing a sticky agent and a synthetic polymer having a network structure in the elastic sheet-like preparation is preferably 1 to 99% by mass. preferable. If the proportion of water in the gel body is less than 1% by mass, there is a possibility that various additives such as medicinal ingredients and the like to be blended in the gel body cannot be easily dissolved. Conversely, when the proportion of water in the gel body exceeds 99% by mass,
There is a possibility that the stiffness of the gel body becomes weak, and it becomes difficult to stably maintain additives such as a solvent and a medicinal component contained in the gel body. The proportion of water in the gel body is particularly preferably 5 to 95% by mass in the above range, preferably 10 to 95% by mass.
More preferably, it is ８５85% by mass.

As a solvent constituting the above gel body, in addition to water, it does not cause phase separation with water. Conventionally, it has been used for transdermal applications in the fields of cosmetics, pharmaceuticals, quasi-drugs, sanitary materials, sundries and the like. Any solvent may be used as long as it is used. Examples of such a solvent include monoalcohols such as ethyl alcohol, glycols such as 1,3-butylene glycol, and polyhydric alcohols such as glycerin.
These can be used alone or in combination of two or more.

The proportion of the solvent other than water in the gel body is 98
It is preferable that the content is not more than mass%. When the proportion exceeds 98% by mass, there is a possibility that various additives and the like blended in the gel body cannot be easily dissolved. Furthermore, the stiffness of the gel body may be weakened, and it may be difficult to stably maintain additives such as a solvent and a medicinal component contained in the gel body.

The synthetic polymer having a viscosity and a network structure, which constitutes the gel body, has an affinity for water and retains the gel structure even after storage at least at 60 ° C. for one month. It is not particularly limited except that it is used as a transdermal application in the fields of pharmaceuticals, quasi-drugs, sanitary materials, sundries and the like. Examples of the adhesive include polyacrylic acid and its salts, polymethacrylic acid and its salts, polyacrylamide, polyvinylpyrrolidone,
Examples include polyvinyl alcohol, polyvinyl acetamide, alginic acid and salts thereof, agar, carrageenan, xanthan gum, copolymers of these monomers, and copolymers of these monomers with other monomers. Among them, a synthetic polymer having a network structure is preferable since it forms a gel body with high elasticity.

As the synthetic polymer having a network structure, (a) 1
A copolymer of one or more polymerizable unsaturated monomers and a crosslinkable unsaturated monomer, or (b) a carboxyl group, a sulfonic group, a hydroxyl group, an amide group, or an amino group in the side chain Having at least one functional group selected from the group
From a hydrophilic synthetic polymer obtained by polymerizing one or more polymerizable unsaturated monomers and a polyvalent metal ion compound, a polycarboxylic acid, a polyhydric alcohol, a polyfunctional epoxide and a dialdehyde At least one selected from the group consisting of
A crosslinked structure obtained by reacting with a kind of crosslinking factor is suitably used.

Examples of the hydrophilic synthetic polymer having a carboxyl group in the side chain include poly (meth) acrylic acid and those obtained by neutralizing a part or all of the carboxyl group with an alkali such as sodium hydroxide. Examples of the hydrophilic synthetic polymer having a sulfonic acid group in the side chain include poly-t-butylacrylamide sulfonic acid and those obtained by neutralizing a part or all of the sulfonic acid group with an alkali such as sodium hydroxide. Examples of the hydrophilic synthetic polymer having a hydroxyl group in a side chain include polyvinyl alcohol obtained by polymerizing and hydrolyzing a vinyl acetate monomer. Examples of hydrophilic synthetic polymers having an amide group in a side chain include poly (meth) acrylamide, polyN, N′-dimethyl (meth) acrylamide, polyvinylpyrrolidone, and polyN-
Vinylacetamide and the like. Examples of the hydrophilic synthetic polymer having an amino group in the side chain include polyallylamine, one in which some or all of the amino groups are neutralized with an acid such as hydrochloric acid, and polymethacryloyltrimethyloxyethylammonium chloride.

The monomer constituting the above-mentioned hydrophilic synthetic polymer may have, in addition to a carboxyl group, a sulfonic acid group, a hydroxyl group, an amide group and an amino group, a functional group modified from these groups. For example, a treatment for esterifying about 40% of the hydroxyl groups or carboxyl groups in the hydrophilic synthetic polymer to make it lipophilic may be performed for the purpose of improving the adhesion to the skin. Further, when there is a long saturated hydrocarbon portion in the side chain, for the purpose of imparting hydrophilicity to the portion,
Further, a carboxyl group, a sulfonic acid group, a hydroxyl group, an amide group, an amino group, or the like may be introduced, or a treatment with a reagent such as an acid or an alkali may be performed. These treatments may be performed before the polymerization of the monomer or after the polymerization.

Examples of the polymerizable unsaturated monomer include (meth) acrylic acid (and its salt); t-butylacrylamide sulfonic acid (and its salt), N, N'-dimethylacrylamide, dimethylaminopropyl methacrylamide and the like. (Meth) acrylamide derivative; vinylpyrrolidone and the like are preferably used from the viewpoint of easy production. The polymerizable unsaturated monomer may be used alone or
A mixture of more than one species is used.

Examples of the crosslinking unsaturated monomer include N,
N'-methylenebisacrylamide, N, N'-methylenebismethacrylamide, N, N'-ethylenebisacrylamide, N, N'-ethylenebismethacrylamide, 1,2-diacrylamideethylene glycol and the like.

As described above, the crosslinking factor may be a polyvalent metal ion compound, a polyvalent carboxylic acid, a polyhydric alcohol,
Examples include polyfunctional epoxides and dialdehydes. Among them, examples of the polyvalent metal ion compound include an aluminum compound, a calcium compound, and a magnesium compound. Among them, from the viewpoint of crosslinking efficiency, aluminum hydroxide and salts thereof, synthetic aluminum silicate, magnesium aluminate metasilicate, magnesium aluminum oxide, aluminum oxide, dihydroxyaluminum amino acetate, magnesium aluminum hydroxide carbonate hydrate,
Compounds containing trivalent aluminum ions such as aluminum hydroxide sodium carbonate coprecipitate are preferred, and those having an amorphous structure are more preferred. Examples of the polycarboxylic acid include succinic acid, fumaric acid, phthalic acid, citric acid, malic acid and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, butanediol, glycerin, diethylene glycol, diglycerin and the like. As the polyfunctional epoxide, for example, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, polytetramethylene glycol diglycidyl ether, glycerol polyglycidyl ether, polyglycerol polyglycidyl ether, Sorbitol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylolpropane polyglycidyl ether, pentaerythritol polyglycidyl ether, resorcin diglycidyl ether, neopentyl glycol diglycidyl ether,
1,6-hexanediol diglycidyl ether and the like. Examples of dialdehydes include glyoxal, terephthalaldehyde, glutaraldehyde and the like.

In the elastic sheet-form preparation of the present invention, the compounding amount of the synthetic polymer having a tackifier and / or a network structure constituting the gel is 1 to 50% by mass based on the gel. Is preferred. If the amount of the adhesive or the synthetic polymer is less than 1% by mass, the stiffness of the gel becomes weak, and it may be difficult to stably maintain additives such as a solvent and a medicinal component contained in the gel. There is. Conversely, if it exceeds 50% by mass, the gel strength is increased, but the polymer structure of the gel body becomes too dense, and the amount of the solvent, medicinal component and the like that can be retained in the gel body may be too small. . The compounding amount of the synthetic polymer is particularly preferably 3 to 30% by mass, more preferably 5 to 25% by mass in the above range.

When the copolymer (a) is used as the synthetic polymer having a network structure, the amount of the crosslinkable unsaturated monomer is 0.005 to 0.5% by mass based on the gel. Preferably it is. If the amount is less than 0.005% by mass, it is difficult to obtain a gel having sufficient waist strength, and it may be difficult to stably maintain additives such as a solvent and a medicinal component contained in the gel. is there. Conversely, if the compounding amount exceeds 0.5% by mass, the brittleness of the obtained gel body increases, and there is a possibility that cutting or breaking may easily occur due to tensile stress or compressive stress.

On the other hand, when the crosslinked structure of the above (b), in which the crosslinking factor is a polyvalent metal ion compound, is used as the synthetic polymer having a network structure, the compounding amount of the polyvalent metal ion compound depends on the gel. It is preferably 0.1 to 10% by mass. When the crosslinking factor is a polycarboxylic acid or a polyhydric alcohol, the blending amount of the polycarboxylic acid or the polyhydric alcohol is 0.1 to
It is preferably 5% by mass. When the crosslinkable factor is a polyfunctional epoxide or dialdehyde, the amount of the polyfunctional epoxide or dialdehyde is preferably 0.01 to 3% by mass based on the gel.

If the amount of the crosslinking factor such as a polyvalent metal ion compound is less than the above range, the resulting synthetic polymer gel body has a low stiffness, and additives such as a solvent and a medicinal component encapsulated in the gel body. May be difficult to keep stable. Conversely, if the compounding amount exceeds the above range, the brittleness of the gel body increases, and there is a possibility that cutting or breaking may easily occur due to tensile stress or compressive stress.

In the above-mentioned elastic sheet-like preparation, it is preferable that one surface of the sheet has adhesiveness, one surface is non-adhesive, and the two surfaces have different degrees of adhesion. Since one side has been treated with a non-adhesive agent, it is possible to prevent the elastic sheet-like preparation from sticking to the hand during use, so that it is possible to improve the feeling of use. Moisture in the gel body is squeezed out on the gel body surface, and a water or a solution layer containing water and a viscosity agent can be formed on the gel body surface. It is preferable because the adhesiveness is enhanced. In addition, as a method of forming a solution layer of water or water and a sticky agent on the gel surface, except for squeezing out from the gel body, when non-adhesiveness is not required, water, water and a sticky agent are used instead of non-adhesive treatment. May be applied or sprayed. As a method of non-adhesive treatment, for example, a method containing a cross-linking factor that increases the cross-linking density of the gel by reacting with the synthetic polymer gel, and on the treated surface (hereinafter referred to as non-adhesive surface) ) Can be reduced compared to the other surface that has not been treated (hereinafter referred to as an adhesive surface) (hereinafter referred to as a non-adhesive treating agent). Since the non-adhesive treating agent is characterized in that the cross-linking factor of the non-adhesive treating agent reacts with the gel to increase the crosslink density of the gel, the gel has a non-adhesive treating agent. It requires a tackifier or a synthetic polymer that can cause a crosslinking reaction with a crosslinking factor. Such a synthetic polymer may itself be a synthetic polymer having a network structure constituting a gel body, or separately from a synthetic polymer having a network structure constituting a gel body, its solvent may be contained in a gel body. In addition, an uncrosslinked adhesive or synthetic polymer included in the gel body may be used.

As the combination of the above non-adhesive treating agent and the gel body, (c) polyhydric cations, polyhydric carboxylic acids, polyhydric alcohols, The synthetic polymer comprising at least one crosslinking factor selected from the group consisting of functional epoxides and dialdehydes, and (d) a synthetic polymer having a network structure constituting a gel, comprises a carboxyl group, a sulfonic acid, Group having at least one functional group selected from the group consisting of a group, a hydroxyl group, an amide group, and an amino group;
A combination of a hydrophilic synthetic polymer obtained by polymerizing at least one kind of polymerizable unsaturated monomer (ie, a synthetic polymer capable of causing a cross-linking reaction with the cross-linking factor of the above (c)) is preferable. .

One or more polymerizable unsaturated monomers having at least one functional group selected from the group consisting of a carboxyl group, a sulfonic group, a hydroxyl group, an amide group and an amino group in the above (d). The method in which the hydrophilic synthetic polymer obtained by polymerizing the monomer has a network structure includes, for example, (e)
A method of producing the copolymerizable unsaturated monomer together with a crosslinkable unsaturated monomer in addition to the polymerizable unsaturated monomer, and (f) a method of polymerizing the polymerizable unsaturated monomer and then preparing a polyvalent metal ion compound. ,
A method of producing a crosslinked structure by reacting with at least one type of crosslinkable factor selected from the group consisting of polyvalent carboxylic acids, polyhydric alcohols, polyfunctional epoxides and dialdehydes.

As described above, as the hydrophilic synthetic polymer having a carboxyl group in the side chain as described in the above (d), poly (meth) acrylic acid or a part or all of the carboxyl group may be sodium hydroxide or the like. And the like neutralized with an alkali. Examples of the hydrophilic synthetic polymer having a sulfonic acid group in the side chain include poly-t-butylacrylamide sulfonic acid and those obtained by neutralizing a part or all of the sulfonic acid group with an alkali such as sodium hydroxide.
Examples of the hydrophilic synthetic polymer having a hydroxyl group in a side chain include polyvinyl alcohol obtained by polymerizing and hydrolyzing a vinyl acetate monomer. Examples of the hydrophilic synthetic polymer having an amide group in a side chain include poly (meth) acrylamide, polyN, N′-dimethyl (meth) acrylamide, polyvinylpyrrolidone, and polyN-vinylacetamide. Examples of the hydrophilic synthetic polymer having an amino group in the side chain include polyallylamine, one in which some or all of the amino groups are neutralized with an acid such as hydrochloric acid, and polymethacryloyltrimethyloxyethylammonium chloride.

As described above, the monomers constituting the hydrophilic synthetic polymer include a carboxyl group, a sulfonic acid group,
In addition to a hydroxyl group, an amide group, and an amino group, it may have a functional group modified from these groups. For example, a treatment for esterifying about 40% of the hydroxyl groups or carboxyl groups in the hydrophilic synthetic polymer to make it lipophilic may be performed for the purpose of improving the adhesion to the skin. Further, when there is a long saturated hydrocarbon portion in the side chain, for the purpose of imparting hydrophilicity to the portion, further carboxyl group, sulfonic acid group,
You may introduce | transduce a hydroxyl group, an amide group, an amino group, etc., and may process with reagents, such as an acid and an alkali. These treatments may be performed before the polymerization of the monomer or after the polymerization.

As described above, the polymerizable unsaturated monomer described in the above (d) includes (meth) acrylic acid (and its salt); t-butylacrylamidosulfonic acid (and its salt); Derivatives of (meth) acrylamide such as N, N'-dimethylacrylamide and dimethylaminopropylmethacrylamide; vinylpyrrolidone and the like;
It is suitably used from the viewpoint of easy production. The polymerizable unsaturated monomers may be used alone or as a mixture of two or more.

Further, as the crosslinkable unsaturated monomer described in (e) above, for example, N, N'-methylenebisacrylamide, N, N'-methylenebismethacrylamide, N, N ' -Ethylenebisacrylamide, N, N'-ethylenebismethacrylamide, 1,
2-diacrylamide ethylene glycol and the like.

The crosslinkable factors described in (f) above include polyvalent metal ion compounds, polycarboxylic acids, polyhydric alcohols, polyfunctional epoxides, and dialdehydes, as described above.

Among these, as described above, examples of the polyvalent metal ion compound include an aluminum compound, a calcium compound, a magnesium compound and the like. Among them,
From the viewpoint of crosslinking efficiency, aluminum hydroxide and salts thereof, synthetic aluminum silicate, magnesium magnesium metasilicate, magnesium aluminum oxide, aluminum oxide, dihydroxyaluminum amino acetate, magnesium aluminum hydroxide carbonate hydrate, aluminum hydroxide carbonate Compounds containing trivalent aluminum ions such as sodium coprecipitate are preferred, and those having an amorphous structure are more preferred. Examples of the polycarboxylic acid include succinic acid, fumaric acid, phthalic acid, citric acid, malic acid and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, butanediol, glycerin, diethylene glycol, diglycerin and the like. As the polyfunctional epoxide, for example, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, polytetramethylene glycol diglycidyl ether, glycerol polyglycidyl ether, polyglycerol polyglycidyl ether, Sorbitol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylolpropane polyglycidyl ether, pentaerythritol polyglycidyl ether, resorcin diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, and the like. Examples of dialdehydes include glyoxal, terephthalaldehyde, glutaraldehyde and the like.

In the case of producing by a copolymerization method (e) as a method having a network structure, the compounding amount of the crosslinkable unsaturated monomer is 0.005 to 0.5% by mass based on the gel body. Is preferred. If the amount is less than 0.005% by mass, it is difficult to obtain a gel having sufficient waist strength, and it may be difficult to stably maintain additives such as a solvent and a medicinal component contained in the gel. is there. Conversely, if the blending amount is 0.
If it exceeds 5% by mass, the brittleness of the obtained gel body increases,
Cutting or destruction may easily occur due to tensile stress or compressive stress.

On the other hand, as a method having a network structure, when the crosslinkable factor is a polyvalent metal ion compound and the crosslinked structure of (f) is produced, the compounding amount of the polyvalent metal ion compound is based on the gel body. It is preferably 0.1 to 10% by mass. When the crosslinking factor is a polycarboxylic acid or a polyhydric alcohol, the blending amount of the polycarboxylic acid or the polyhydric alcohol is preferably 0.1 to 5% by mass based on the gel body. When the crosslinkable factor is a polyfunctional epoxide or dialdehyde, the amount of the polyfunctional epoxide or dialdehyde is preferably 0.01 to 3% by mass based on the gel.

When the amount of the crosslinking factor such as a polyvalent metal ion compound is less than the above range, the resultant synthetic polymer gel has a low stiffness, and additives such as a solvent and a medicinal component encapsulated in the gel. May be difficult to keep stable. Conversely, if the compounding amount exceeds the above range, the brittleness of the gel body increases, and there is a possibility that cutting or breaking may easily occur due to tensile stress or compressive stress.

The crosslinking factor described in (c) above includes, in addition to the polyvalent cations described below, polyvalent carboxylic acids, polyhydric alcohols, polyfunctional epoxides, and dialdehydes. Examples of the polycarboxylic acid include succinic acid, fumaric acid, phthalic acid, citric acid, malic acid and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, butanediol, glycerin, diethylene glycol, diglycerin and the like. Examples of the polyfunctional epoxide include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, polytetramethylene glycol diglycidyl ether, glycerol polyglycidyl ether,
Polyglycerol polyglycidyl ether, sorbitol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylolpropane polyglycidyl ether, pentaerythritol polyglycidyl ether,
Examples include resorcin diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, and the like. Examples of dialdehydes include glyoxal, terephthalaldehyde, glutaraldehyde and the like.

Further, a suitable combination of the hydrophilic synthetic polymer described in (d) above and the crosslinking factor described in (c) above for non-adhesive treatment to be applied to one surface of the adhesive or the synthetic polymer gel body. Is made of a hydrophilic synthetic polymer obtained by polymerizing a polymerizable unsaturated monomer having at least an anionic functional group, from the viewpoint that production is easier, and As such a crosslinking factor, a combination of those having at least a polyvalent cation is preferable.

The above-mentioned anionic functional groups are all functional groups capable of chemically bonding to cations in water. From the viewpoint of easy production, -COOH, -COOX
A carboxyl group represented by (X; counter ion) is preferred.

The above-mentioned polyvalent cations are all cations having two or more valencies, and from the viewpoint of crosslinking reaction efficiency, for example, A
Trivalent or higher ions such as l ³⁺ , Fe ³⁺ , Ti ³⁺ , In ³⁺ , Zr ⁴⁺ , and Ta ⁵⁺ are preferable.

The form of the polyvalent cation may be a salt which is soluble in water such as aluminum chloride, or a salt which is hardly soluble in water such as synthetic aluminum silicate. I don't care. The selection of the solubility / poor solubility of these salts selects the one most suitable for the production method. That is, if the purpose of such non-adhesive treatment is to be carried out immediately, it may be selected in the form of a salt which is soluble in the solvent contained in the selected non-adhesive treating agent or gel at that time. When the treatment is intended to be performed for, for example, one hour or more, a salt form that is hardly soluble in the solvent contained in the non-adhesive treatment agent or gel selected at that time may be selected.

The non-adhesive treating agent for treating one surface of the adhesive or the synthetic polymer gel contains the above-mentioned crosslinking factor,
It may contain a solvent or the above-mentioned adhesive, and examples of such a solvent include water and monoalcohols such as ethyl alcohol;
Glycols such as 3-butylene glycol, and polyhydric alcohols such as glycerin are exemplified. As aforementioned,
The crosslinking agent may be dissolved in such a solvent, or may not be dissolved as in a slurry. Further, the non-adhesive treating agent may contain various additives as necessary.

The amount of the non-adhesive treating agent to be applied to the surface of the gel body is 1 × 10 ⁻¹⁰ equivalent / cm ² to 1 × 10 ^{−2 in} terms of the crosslinking equivalent of the crosslinking factor per square centimeter of the gel body surface.
It is preferably equivalent / cm ² . Processing amount is 1 × 10 ^-10
If it is smaller than the equivalent weight / cm ^2, the difference in adhesion between the non-adhesive surface and the adhesive surface does not appear remarkably, and handling during use becomes poor. When the processing amount is larger than 1 × 10 ^-2 equivalent / cm ² , the non-adhesive treatment of the non-adhesive surface is sufficiently performed,
It does not work any more. Here, the cross-linking equivalent of the cross-linking factor refers to the amount of the cross-linking points of the cross-linking factor expressed in moles.

When a non-adhesive treating agent is applied to one surface of the adhesive or the synthetic polymer gel, such a surface may be treated with a uniform treatment amount over one surface, or may be partially treated. The processing amount may be non-uniform. Therefore, the surface may be non-uniformly treated within the above-mentioned preferable treatment amount.

The thickness of the elastic sheet-form preparation used in the present invention may be appropriately set according to the conditions of use, and may be uniform throughout or partially different in thickness. Considering the discomfort and strength when applied to the skin, it is preferably in the range of 0.5 to 6 mm,
More preferably, it is preferably in the range of 0.6 to 3 mm. If the thickness of the entire sheet is less than 0.5 mm, there is a problem in that when the sheet is stretched, the thickness of the sheet becomes too thin, the strength is weakened, and the feeling in use deteriorates. On the other hand, if it exceeds 6 mm, the strength of the sheet becomes too large, making it difficult to stretch, and may cause discomfort when applied to the skin.

Various additives can be added to the stretchable sheet-form preparation of the present invention in addition to the above-mentioned various components. For example, in addition to medicinal ingredients for the treatment of beauty, beauty and skin, etc., moisturizers, fragrances, coloring agents, stabilizers, antioxidants, ultraviolet absorbers, tackifiers, pH adjusters, chelating agents, surfactants Agents, preservatives, antibacterial agents and the like.

Examples of the humectant include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, dipropylene glycol, glycerin, diglycerin, sorbitol, malbitol, trehalose, raffinose, xylitol, mannitol, hyaluronic acid and salts thereof, polyethylene glycol, Glycols such as polyglycerin, polyhydric alcohols, polysaccharides and the like can be mentioned. These can be used alone or
It is preferable to use a mixture of two or more.

The following is an example of a method for producing the elastic sheet-like preparation of the present invention. The elastic sheet-shaped preparation is, for example, a synthetic polymer having a network structure constituting the gel body,
(A) a copolymer of one or more polymerizable unsaturated monomers and a crosslinkable unsaturated monomer, or (b) a carboxyl group, a sulfonic acid group, a hydroxyl group, an amide group, A hydrophilic synthetic polymer obtained by polymerizing one or more polymerizable unsaturated monomers having at least one functional group selected from the group consisting of amino groups, and a polyvalent metal ion compound; It is preferably a crosslinked structure obtained by reacting with at least one type of crosslinking factor selected from the group consisting of polyhydric carboxylic acids, polyhydric alcohols, polyfunctional epoxides and dialdehydes.

When the copolymer of the polymerizable unsaturated monomer and the crosslinkable unsaturated monomer (a) is used as a synthetic polymer having a network structure, a method for producing a gel is as follows. For example, a method in which a polymerizable unsaturated monomer, a crosslinkable unsaturated monomer, and a polymerization initiator are added to a solvent constituting a gel to carry out polymerization. For the polymerization, a system in which the polymerization is started by heating or light irradiation or by adding a polymerization initiator may be selected.

On the other hand, when the crosslinked structure formed by reacting the hydrophilic synthetic polymer of (b) with a crosslinkable factor is used as a synthetic polymer having a network structure, a method for producing a gel body is as follows. For example, there is a method in which a hydrophilic synthetic polymer polymerized in advance in the same manner as described above is dissolved, and a crosslinking reaction is performed by adding a crosslinking factor to the solution. The cross-linking reaction may be started by heating or may be started by adding a reaction initiator. Alternatively, a system in which a crosslinking reaction starts immediately upon addition of a crosslinking factor may be selected.

In the case where a gel is obtained by polymerizing the unsaturated monomer in the above (a), when thermal polymerization is carried out using a solution in which the above-mentioned monomer and solvent are mixed, azobiscyanovaleric acid or Azo-based polymerization initiators such as azobisaminopropane dihydrochloride, or reducing agents such as ferrous sulfate, dithionite, pyrosulfite and hydrogen peroxide, t-butyl hydroperoxide, peroxodisulfate The polymerization can be carried out by adding a redox polymerization initiator comprising a peroxide such as These azo-based polymerization initiators and redox-based polymerization initiators may be used alone or in combination as needed. In the case where a redox polymerization initiator is used, a system in which polymerization is initiated only by adding it without heating may be used. In the case of photopolymerization, photo-radical polymerization initiators such as acetophenone-based, benzoin ether-based, phosphorus-based, benzophenone-based, thioxanthone-based, and azo-based, and photocationic polymerization such as diazonium salts, diallyliodonium salts, and triarylsulfonium salts. Polymerization can be carried out by adding an initiator or the like.

The thickness of the stretchable sheet-like preparation can be adjusted by, for example, using an extruder or a doctor blade or the like to spread the gel-forming composition before the curing of the gel body, This is performed by filling a container having a thickness, for example, a blister container.

In the latter method of filling a container having a concave portion with a predetermined depth, if the shape of such a container is formed according to the shape of a stretchable sheet-like preparation, the in-line manufacturing process becomes easy, This is preferable in the manufacturing process. Furthermore, compared with the method of forming a long belt-like gel body and punching it into the intended shape at the time of use, the amount of gel to be discarded is reduced, and since there is no contact between the gel body and the punching blade, sanitary It is also preferable from the viewpoint of being appropriate.

As a method of treating one surface of a stretchable sheet-form preparation with the above-mentioned non-adhesive treating agent, (i) after the curing of the gel body is completed, using the non-adhesive treating agent on the surface thereof Before the curing of the gel body (j), the surface thereof may be treated with a non-adhesive treating agent. In addition, "the completion of the curing of the gel body" in the present invention means that the compound before gelation has undergone a gelling reaction and is in a state having shape retention.

The production method in the case of the above (i) is as follows. On one surface of the cured gel body, for example, a coater,
A method of applying a non-adhesive treatment agent by a method such as coating using a printing machine, brush or the like, or spraying using a spray or the like is preferable.

In the case of the above (j), the production method may be such that, for example, a coater, a printing machine,
A method of applying a non-adhesive treatment agent by a method such as coating using a brush or spraying using a spray or the like is preferable.

However, as the production conditions in the case of the above (j), the gel-forming composition at the time of treating one surface of the gel-forming composition with a non-adhesive treating agent before the completion of curing is not less than a certain amount. It is desirable to have a viscosity. The viscosity is preferably 1,000 centipoise or more. That is, when the viscosity of the gel-forming composition when treated with the non-adhesive treating agent is smaller than 1,000 centipoise, the gel-forming composition and the non-adhesive treating agent are mixed,
The effect of the non-adhesive treating agent acts on the other untreated surface, and as a result, there is a possibility that there is no difference in the degree of adhesion between both surfaces of the stretchable sheet-like preparation to be produced.

As a manufacturing method in the case of the above (j),
When adjusting the thickness of the gel-forming compound before the end of curing,
By applying a non-adhesive treating agent to such a gel-forming composition, it is possible to cause a difference in the degree of adhesion between both surfaces of the sheet-form preparation to be produced. That is, when adjusting the thickness of the gel-forming composition before the completion of curing, a sheet capable of interposing a non-adhesive treating agent (hereinafter, referred to as an interposed sheet), interposing the non-adhesive treating agent on one surface, After placing the intervening sheet on the gel-forming composition before the completion of the curing, the thickness of the gel-forming composition before the completion of the curing is adjusted using a doctor blade, a squeegee, or the like. As a result, the non-adhesive treating agent held by the interposed sheet can be transferred to the gel-forming composition, and this is allowed to stand until the completion of the curing of the gel body, whereby the desired adhesion of both surfaces is achieved. It is possible to obtain stretchable sheet-like preparations having different degrees.

In the case of such a production method, the viscosity of the gel-forming composition immediately before the thickness adjustment is performed is 10,000 to 2.0.
Preferably, it is 0.000 centipoise. That is, if it is smaller than 10,000 centipoise, the gel-forming composition and the non-adhesive treating agent mix, and the effect of the non-adhesive treating agent acts on the other untreated surface. There is a possibility that no difference occurs in the degree of adhesion between the two surfaces of the stretchable sheet-like preparation.
Also, if it is larger than 2,000,000 centipoise,
It becomes difficult to adjust the thickness of the gel-forming composition itself.

The intermediate sheet may be any sheet as long as the non-adhesive treating agent can be interposed on one side, and examples thereof include plastic sheets, sponge sheets, paper, woven cloth, and nonwoven cloth. The intervening sheet is
By the time of use to peel from the elastic sheet-like formulation,
A plastic sheet or the like that is easy to peel off is preferable.

In order to facilitate the interposition of the non-adhesive treating agent in the interposed sheet, a thickener can be added to the non-adhesive treating agent.

Until the elastic sheet-like preparation is used, a plastic film of polyethylene, polypropylene, polyethylene terephthalate or the like is left as it is on at least the adhesive surface side, or a silicone resin or the like is applied on the surface of the plastic film. It is necessary to paste it as a release paper with the release agent applied or baked
Sanitary preferred. In addition, it is preferable to apply the release paper to the non-adhesive side from the viewpoint of preventing drying of the stretchable sheet-form preparation and hygiene considerations.

It is preferable to peel off the release paper when used since it is not flexible enough to follow the movement of the skin surface due to its poor flexibility. If the release paper is used with the release paper adhered to the non-adhesive surface, the release paper will peel off from the elastic sheet-like preparation during use, making it difficult to handle. The release paper may be used as an underlay or a surface material in the process of producing a gel of an elastic sheet-like preparation, or may be attached after the production of the elastic sheet-like preparation is completed.

The shape of the stretchable sheet-like preparation of the present invention may be, in addition to the above, square,
Various shapes such as a rectangle, an ellipse, a circle, a heart, a semicircle, a semiellipse, or a combination thereof can be used.

Further, after using the stretchable sheet-form preparation of the present invention, massage is carried out using cream, emulsion or lotion, or continuous moisturizing is carried out by applying an essence containing a thickener. Wrinkles can be improved more effectively.

[0075]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. The evaluation methods used in the examples and comparative examples are as follows.

[Evaluation of Skin Utility] Ten expert panelists were prepared for each evaluation item (however, panelists may be duplicated depending on the item), and evaluations were made in accordance with the evaluation criteria shown in Table 1. The total score was used as the evaluation result. Therefore, the higher the score, the higher the usefulness for the evaluation item is shown (full score: 50 points). The samples were evaluated once every two days for two weeks.

[Table 1] Reference points --------------------------------------- ----------- High effect 5 High effect 4 Low effect 3 Low effect 2 Low effect 1

Example 1 An elastic sheet-shaped preparation of a synthetic polymer gel type was prepared by the following production method. Table 2 shows the compositions of the gel-forming composition and the non-adhesive treating agent.

[Table 2] Composition mass% -------------------------------------- ----------------------------- <Formation compound for gel formation> Polymerizable unsaturated monomer Acrylic acid 20.0 Crosslinkability Unsaturated monomer N, N'-methylenebisacrylamide 0.1 Polymerization initiator 4% aqueous solution of ammonium persulfate 5.0 2% aqueous solution of potassium pyrosulfite 5.0 pH adjuster 10% aqueous solution of sodium hydroxide 40.0 Humectant Glycerin 20.0 Preservative Methyl paraben 0.13 Medicinal ingredient Aloe extract 0.3 Vitamin C derivative 3.0 Purified water Residual total 100.0 <Non-adhesive treatment agent> Crosslinking factor Aluminum chloride hexahydrate (Al content : 11%) 10.0 Solvent Ethyl alcohol 50.0 Purified water Residual total 100.0

The components excluding the polymerization initiator (4% aqueous solution of ammonium persulfate and 2% aqueous solution of potassium pyrosulfite) in the gel-forming compounds shown in Table 2 were dissolved and mixed with purified water and glycerin (humectant) as solvents. Thereafter, the polymerization initiator was added and stirred well to obtain a gel-forming composition. Next, a polyethylene terephthalate sheet (thickness: 50 μm) having a surface baked with a silicone resin (release agent)
m) A spacer having a thickness of 1.3 mm was placed on the top, and the gel-forming composition was poured into a region surrounded by the spacer. After placing a nylon tulle on top of it, the surface of the compound was further covered with a polyethylene terephthalate sheet (100 μm thick) on which a silicone resin (release agent) was baked, and pressed at 70 ° C. By heating for a minute to carry out polymerization, the curing of the gel body was terminated, and a synthetic polymer gel body was formed.

From the above synthetic polymer gel, 100 μm thick
m of the polyethylene terephthalate sheet was peeled off, and a non-adhesive treating agent in which a crosslinkable factor (aluminum chloride hexahydrate) shown in Table 2 was dissolved in a solvent (ethyl alcohol and purified water) was applied to the peeled gel body surface. 9 mg / cm ² (i.e., 1.1 × 1
0 ^-5 and treated painted eq / cm ^2). Further, a 50 μm-thick polypropylene sheet was placed on the surface of the gel treated with the non-adhesive treating agent. When this sheet was actually stretched by hand and a practically preferable expansion ratio was measured, it was 30%.
Met. Cut out the positions of the eyes and mouth based on this value,
A notch was provided at the position of the nose. Based on the above criteria, A = 3
0, L0 = 300 mm, e0 = 35 mm, e1 = 45 m
m, n0 = 25 mm, m0 = 45 mm, margin = 10 m
m, the distance between the center line of the eye and the horizontal cutout of the nose, and the distance between the horizontal cutout of the nose and the centerline of the mouth are each 55 including margin.
mm, 35 mm, width in eye height direction = 20 m
m, width in the height direction of the mouth = 20 mm, horizontal length of the cut portion of the nose = 40 mm, length of the concave portion (provided with a cut in the vertical direction beside the bridge of the nose) = 20 mm, basically After fixing the position of the nose, it was designed to stretch laterally.
In addition, the shape of the whole sheet was punched out in an egg shape. And as a method of use, it was stretched and attached to the face.

Example 2 A synthetic polymer gel type elastic sheet-like preparation was prepared by the following production method. Table 3 shows the compositions of the gel-forming composition and the non-adhesive treating agent.

[Table 3] Composition mass% -------------------------------------- ----------------------------- <Formulation for gel formation> Hydrophilic synthetic polymer Polyacrylic acid (Molecular weight about 10,000) 8.5 Sodium polyacrylate (molecular weight: about 4 million) 4.0 Crosslinking factor Synthetic aluminum silicate (Al content: 5.6%) 2.3 Moisturizer 1,3-butylene glycol 10.0 Preservative Dehydro Sodium acetate 0.3 Medicinal ingredient Aloe extract 0.3 Vitamin C derivative 3.0 Purified water balance Total 100.0 <Non-adhesive treatment agent> Crosslinking factor Aluminum chloride hexahydrate (Al content: 11%) 10 0.0 Solvent Purified water balance Total 100.0

Components other than the crosslinking factor (synthetic aluminum silicate) among the gel-forming compounds shown in Table 3 were mixed.
The mixture was kneaded at 50 ° C. for about 30 minutes to make it uniform. Next, the crosslinking factor was added, and the mixture was further kneaded at 60 ° C. for about 10 minutes to be uniform. The gel-forming composition thus obtained is
A sheet-shaped synthetic polymer is obtained by uniformly spreading a 1.3 mm thick sheet on a polypropylene sheet (100 µm thick) using a doctor blade and leaving it at room temperature for about 6 hours to complete the curing of the gel. A gel body was obtained.

The non-adhesive treating agent shown in Table 3 was uniformly applied to the upper surface (the surface without a sheet) of the above-mentioned sheet-like synthetic polymer gel using a brush to obtain the synthetic polymer gel. The body was subjected to a non-adhesive treatment. The application amount of the non-adhesive treatment agent was adjusted so as to be 3 mg per 1 cm ² of the surface of the synthetic polymer gel body (that is, 3.7 × 10 ⁻⁶ equivalent / cm ^{2 in} crosslinking equivalent).

From the above synthetic polymer gel, a 100 μm thick
m, the polypropylene sheet was peeled off, and the gel sheet alone was actually stretched by hand, and a practically preferable expansion / contraction ratio was measured to be 50%. Based on this value, the positions of the eyes and mouth were cut out, and cutouts were provided at the positions of the nose. Based on the above criteria, A = 50, L0 = 300 mm, e0 = 35 mm, e
1 = 45 mm, n0 = 25 mm, m0 = 45 mm, margin value = 10 mm, intervals between the center line of the eyes and the horizontal cutout of the nose, and the intervals between the horizontal cutout portion of the nose and the centerline of the mouth are 55 mm and 35 mm, respectively, including the allowance. The width in the height direction of the eyes = 20 mm, the width in the height direction of the mouth = 20 mm, the horizontal length of the cut portion of the nose = 40 mm, the concave portion (the cut in the vertical direction beside the bridge of the nose) (Provided) length = 20 mm, basically designed to fix the position of the nose and then stretch in the lateral direction. In addition, the shape of the whole sheet was punched out in an egg shape. And as a method of use, it was stretched and attached to the face.

Example 3 A synthetic polymer gel type elastic sheet-like preparation was prepared by the following production method. Table 4 shows the compositions of the gel-forming composition and the medicinal component liquid.

[Table 4] Composition mass% -------------------------------------- ---------------------------- <Gel-forming compound> Polymerizable unsaturated monomer Acrylamide 25.0 Crosslinkable unsaturated Monomer N, N'-methylenebisacrylamide 0.1 Polymerization initiator Irgacure 184 (manufactured by Ciba Geigy) 0.3 Moisturizer Glycerin 20.0 Preservative Methyl paraben 0.13 Purified water Residue Total 100.0 Liquid> Pharmaceutical Ingredients Aloe Extract 0.9 Vitamin C Derivative 9.0 Moisturizer Dipropylene Glycol 10.0 Purified Water Residual Total 100.0

After dissolving and mixing the gel-forming composition shown in Table 4, a polyethylene terephthalate sheet (100 μm thick) having a surface baked with a silicone resin (release agent)
A spacer having a thickness of 1.3 mm was placed on the upper portion, and the gel-forming composition was poured into a region surrounded by the spacer. After placing a 15-denier nylon tulle from above, the surface of the blend was further covered with a polyethylene terephthalate film (thickness 38 μm) having a silicone resin (release agent) baked on the surface, and pressed 50 Ultraviolet rays having an intensity of milliwatt / cm ² were irradiated for 60 seconds to carry out polymerization to terminate gelation, thereby forming a synthetic polymer gel body.

From the above synthetic polymer gel, a 100 μm thick
m of the polyethylene terephthalate sheet was peeled off, and the medicinal component liquid shown in Table 4 was uniformly dropped on the surface of the peeled gel body using a syringe so as to correspond to 30 mg / cm ^2. The medicinal component was added almost uniformly by laminating a terephthalate sheet and spreading the medicinal component solution on the gel body surface.

Further, the films were peeled off, and the gel sheet alone was actually stretched by hand, and a practically preferable expansion ratio was measured and found to be 30%. Based on this value, the positions of the eyes and mouth were cut out, and cutouts were provided at the positions of the nose. Based on the above criteria, A = 30, L0 = 300 mm, e0 = 35 m
m, e1 = 45 mm, n0 = 25 mm, m0 = 45 m
m, the margin value = 10 mm, the interval between the center line of the eye and the horizontal cutout of the nose, and the interval between the horizontal cutout portion of the nose and the center line of the mouth are set to 55 mm and 35 mm, respectively, including the allowance value, and are set in the eye height direction. Basic width = 20 mm, width in the height direction of the mouth = 20 mm, horizontal length of the cut portion of the nose = 40 mm, length of the concave portion (provided with a cut in the vertical direction beside the bridge of the nose) = 20 mm Was designed to fix the position of the nose and then stretch it laterally. In addition, the shape of the whole sheet was punched out in an egg shape. And as a method of use, it was stretched and attached to the face.

Example 4 A single polymer gel type elastic sheet-like preparation was produced by the following production method. Table 5 shows the composition of the gel-forming composition.

[Table 5] Composition mass% -------------------------------------- -------------------- <Gel-forming composition> iota-carrageenan 5.0 marbit 30.0 sodium hyaluronate 0.5 calcium lactate 0.2 purified water Remaining amount Preservative methylparaben 0.1 Pharmaceutical ingredient 10% Vitamin C aqueous solution 10.0 Total 100.0

The formulations for forming gel bodies shown in Table 5 were stirred to be uniform, and then heated to 95 ° C. to dissolve them. A spacer having a thickness of 1.3 mm was placed on a polyethylene terephthalate film (thickness: 100 μm) having a surface baked with a silicone resin (release agent), and the gel-forming composition was poured into a region surrounded by the spacer. . After placing a 15-denier nylon tulle from above,
Furthermore, it is covered with polyethylene terephthalate film (thickness 38 μm) baked with silicone resin and pressed.
The polymer gel was formed by cooling and solidifying in this state.

The films were peeled from the polymer gel body, and the gel sheet alone was actually stretched by hand, and a practically preferable expansion / contraction ratio was measured and found to be 30%. Based on this value, the positions of the eyes and mouth were cut out, and cutouts were provided at the positions of the nose. Based on the above criteria, A = 30, L0 = 300 mm, e
0 = 35 mm, e1 = 45 mm, n0 = 25 mm, m0
= 45 mm, margin value = 10 mm, the center line of the eye and the horizontal cutout of the nose, the interval between the horizontal cutout of the nose and the center line of the mouth are set to 55 mm and 35 mm, respectively, including the margin value,
Eye width = 20 mm, mouth height = 20
mm, horizontal length of cutout of nose = 40 mm, length of concave portion (provided with cutout in the vertical direction beside nose bridge) = 2
Basically, the nose was fixed at 0 mm, and then designed to be stretched in the lateral direction. In addition, the shape of the whole sheet was punched out in an egg shape. And as a method of use, it was stretched and attached to the face.

Comparative Example 1 A commercially available whole face mask of quasi-drug type containing vitamin C in which an opaque nonwoven fabric was coated with a plaster was used.

Comparative Example 2 A commercially available full face type lotion mask in which an opaque nonwoven fabric was impregnated with a lotion containing vitamin C and a humectant was used.

Table 6 shows the evaluation results of the examples and the comparative examples.

[Table 6] Transparency Fitting Tightness Suitable for face shape ------------------------------ -------------------------------------- Example 1 Transparent 46 45 42 Example 2 Transparent 45 40 41 Example 3 Transparent 47 34 38 Example 4 Transparent 42 35 37 Comparative Example 1 Opaque 33 23 33 Comparative Example 2 Opaque 36 37 38

From the results shown in Table 6, it can be seen that the examples of the present invention are transparent, have excellent fit, are stretchable, have a strong tightening feeling, and can be adjusted to the shape of the face better than the comparative examples. . Also, a questionnaire to panelists had a high evaluation that the nose could be fitted well.
On the other hand, Comparative Example 1 is a coated-type whole face mask, but has no elasticity and has a poor tightening feeling, and since the eyes and mouth openings are large, it is difficult to pack parts such as the outer corner of the eyes that are desired to be packed. Opinion came out. Further, Comparative Example 2 was a lotion mask having little elasticity, and had good results as a whole, but lacked features compared to Example 1.

[0101]

From the above results, it can be seen that the present invention enhances the skin tightening effect by using a stretchable sheet-like preparation while stretching it in a certain direction, and also changes the proportion of the skin stretched during use, such as the face. It is apparent that the present invention provides a sheet-like preparation characterized by being able to freely cope with the size of a site having a large individual difference, and a cosmetic method thereof.

[Brief description of the drawings]

FIG. 1 is a view showing a use state of a sheet cosmetic for a whole face, which is one embodiment of the present invention.

[Explanation of symbols]

 1. Sheet-shaped cosmetics 2. Sheet preparations

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yasushi Hayashi 7-33, Oanji, Nara City, Nara Prefecture, Japan (72) Takashi Higashi 585, Sakurai 585, Sakurai City, Nara Prefecture Laurel Coat Sakurai Minami 706 F-term (reference) 4C083 AA112 AC102 AC122 AC132 AC302 AC482 AC842 AD092 AD112 AD332 AD352 AD642 CC07 DD12 DD41 EE12

Claims (10)

[Claims] 1. A sheet-shaped cosmetic preparation which is an elastic sheet-shaped preparation which can be used while being stretched in a certain direction. 2. The sheet cosmetic according to claim 1, wherein the stretching ratio is in the range of 5 to 300% of the original size of the sheet preparation. 3. The sheet cosmetic according to claim 1, wherein the stretching ratio is in the range of 10 to 100% of the original size of the sheet preparation. 4. The method according to claim 1, wherein the elastic sheet-like preparation is in the form of a face, and the eyes, nose and mouth are cut or punched. Sheet cosmetics. 5. The sheet-shaped cosmetic according to claim 1, wherein the appearance of the stretchable sheet-shaped preparation is transparent or translucent. 6. A woven or nonwoven fabric having a sufficiently large aperture ratio is internally or laminated in the thickness direction inside or on the surface of the elastic sheet-form preparation. 2. The sheet-shaped cosmetic according to claim 1. 7. The stretchable sheet-like preparation is provided with a solution layer containing water on the surface thereof.
6. The sheet cosmetic according to any one of items 6 to 6. 8. The method according to claim 1, wherein an elastic sheet-form preparation for the face is used while being stretched in a certain direction, so that it is possible to cope with differences in the size of the face, which vary among individuals. 2. The sheet-shaped cosmetic according to item 1. 9. In a stretchable sheet-form preparation for the face, the positions of cuts or punches provided in the eyes, nose, and mouth are calculated from the stretching ratio of the sheet-form preparation and the average positions of the eyes, nose, and mouth. The sheet cosmetic according to any one of claims 1 to 8, wherein the cosmetic is in the form of a sheet. 10. A cosmetic method characterized in that the use of a stretchable sheet-like preparation while stretching it in a certain direction enhances the skin tightening effect.