JP2002255736A - Cosmetic impregnated sheet - Google Patents

Abstract

(57) [Problem] To provide a cosmetic impregnated sheet capable of uniformly applying a cosmetic base having thixotropic properties to skin. SOLUTION: The cosmetic-impregnated sheet 1 is obtained by impregnating only one surface of a base sheet 2 with a base having thixotropic properties. The base sheet 2 includes a support sheet 3, a liquid-impermeable sheet 4 laminated on one surface of the support sheet 3,
And a flexible sheet 5 laminated on the surface of the liquid impermeable sheet 4 opposite to the surface facing the carrier sheet, and only the carrier sheet 3 is impregnated with the base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cosmetic-impregnated sheet obtained by impregnating a base sheet with a cosmetic base having thixotropic properties.

[0002]

BACKGROUND OF THE INVENTION Cosmetics having a thixotropic property, such as various creams, are used by applying an appropriate amount of the cosmetic directly to the skin, or once applied to absorbent cotton and then applied to the skin. That is common. However, in this method of use, it is not easy to apply the cosmetic to the skin in an uneven amount, or to quickly apply a large area with a small amount.

[0003] Applying lotion, moisturizing pack, cleansing,
There is also known a personal wiping material in which a base material sheet is impregnated with a cosmetic for the purpose of wiping sweat, removing grease, and the like. For example, JP
Japanese Patent Application Laid-Open No. 1-260881 discloses a spunbonded nonwoven fabric of polypropylene, a moisture-permeable / waterproof polyethylene film, and a nonwoven fabric of viscose rayon laminated in this order. And a composite sheet formed by applying an oily base such as The purpose of this composite sheet is to prevent dirt from passing through and to maintain air permeability so that stuffiness does not occur even when used for sheets or the like. However, when the oily base is actually impregnated, there is a problem in that the hands are stained with the base because the oily base permeates the air-permeable film in a short time. Also, prevention of strike-through of the wiped dirt is not sufficient. Further, since the spunbonded nonwoven fabric of polypropylene is thin and can impregnate only a small amount of the base material, a sufficient wiping effect cannot be expected, and the oil-based preparation tends to be partially localized in the spunbonded nonwoven fabric. Further, since it is thin and hard, it is not preferable for personal use. In addition, oily liquids generally have a low surface tension, while rayon nonwoven fabrics have high hydrophilicity of fibers and are easy to absorb liquids. In some cases, the rayon runs back to the nonwoven fabric side, and thus lacks storage stability.

JP-A-11-49641 describes a sheet-like cleansing material impregnated with an aqueous solution containing a surfactant aqueous solution as a main base. When the purpose is to float makeup dirt and collect it on a sheet, as in this cleansing material, the dripping and uniformity of the impregnating liquid does not matter so much. When the purpose is to spread the cosmetic liquid positively and spread it evenly, there is a problem that the liquid dripping occurs after the spreading and uniform transferability cannot be obtained. Packing agents are known as sheet-like cosmetics in which the base drug solution does not drip, but since the base impregnated in the packing agent is a polymer crosslinked gel, it can be spread on the skin and spread. Very difficult.

[0005] Japanese Patent Publication No. 2000-503681 discloses that
As a sheet-like cosmetic in which an oil-based base is impregnated in a sheet,
Sheet cosmetics impregnated with an emulsifying base have been proposed. However, this sheet-shaped cosmetic does not solve the problem of dripping described above. In addition, the emulsified base has a problem that the oil component and the water component are easily separated from each other, and are liable to be unevenly distributed and uneven within or between sheets. Also,
The oily base material has a strong sticky feeling to the skin, so that the feeling of use is likely to deteriorate.

Accordingly, an object of the present invention is to provide a cosmetic-impregnated sheet capable of uniformly applying a cosmetic base having thixotropic properties to the skin, and a base sheet used for the impregnated sheet. Another object of the present invention is to provide a cosmetic impregnated sheet capable of quickly applying a cosmetic base having thixotropic properties to a large area even in a small amount, and a base sheet used for the impregnated sheet. . Further, the present invention provides a cosmetic impregnated sheet in which the cosmetic base is prevented from being unevenly distributed during storage, and the transferability of the cosmetic base to the skin is good, and a base sheet used for the impregnated sheet. The purpose is to provide.

[0007]

The present invention achieves the above object by providing a cosmetic-impregnated sheet comprising a base sheet having substantially only one surface impregnated with a base having thixotropic properties. It was done.

The present invention also provides a base sheet having a support sheet and a liquid-impermeable sheet laminated on one surface of the support sheet, and used for impregnating a base having thixotropic properties. is there.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. Drawing 1 is a sectional view showing one embodiment of a cosmetics impregnation sheet of the present invention. The cosmetic impregnated sheet 1 shown in FIG. 1 is configured by impregnating a base material sheet 2 with a cosmetic base. Base sheet 2
Consists of a three-layered laminate. This laminated body was laminated on the carrier sheet 3, the liquid-impermeable sheet 4 laminated on one surface of the carrier sheet 3, and the surface of the liquid-impermeable sheet 4 opposite to the carrier sheet facing surface. It consists of a flexible sheet 5. As a result, in the base sheet 2, the liquid-impermeable sheet 4 is located in the middle, and the support sheet 3 and the flexible sheet 5 are respectively disposed on both sides thereof. The outer surface of the seat 2 is formed.

The cosmetic base is composed of an oily liquid, an emulsion or an aqueous liquid and has a thixotropic property, and is substantially impregnated on only one surface of the base sheet 2. Specifically, the carrier sheet 3 constituting the base sheet 2
Only the cosmetic base is impregnated. It is difficult to impregnate a cosmetic base having thixotropy because of its thixotropy, but it can be easily impregnated by the method described below. However, once the base material 2 can be impregnated with the cosmetic base, the cosmetic can be uniformly applied to the skin, and even a small amount can be quickly applied to a large area. In addition, the cosmetic base impregnated in the base sheet 2 is stably present in the base sheet 2 due to its thixotropy in a normal storage state, and may be unevenly distributed or leak from the base sheet 2. There is no. Therefore, the transfer of the cosmetic base to the skin is performed favorably, and the cosmetic base is coated with the cosmetic impregnated sheet 1 during storage.
In the flexible sheet 5 side which is a non-impregnated surface. Further, for example, even if the cosmetic impregnated sheet 1 is wrapped in a package such as a pillow package in the state of each leaf, the package is not excessively wet with the cosmetic base.

Furthermore, since the cosmetic base is impregnated only in the carrier sheet 3 constituting the base sheet 2, when the cosmetic base is applied to the skin using the cosmetic impregnated sheet 1, the liquid is impermeable. The flexible sheet 4 prevents the cosmetic base from migrating to the flexible sheet 5 and prevents the cosmetic base from adhering to the hand.

Cosmetic bases include oily liquids, emulsions or aqueous liquids, such as various skin care creams, ultraviolet protection creams, antiperspirants, foundations, lipstick bases, detergents, makeup removers, etc., and have thixotropic properties. There is no particular limitation on the type as long as it is a product. In particular, the cosmetic base has the following fluid properties measured by a rheometer at 25 ° C. When the cosmetic-impregnated sheet 1 is stored, the cosmetic base is unevenly distributed in the sheet 1 No. 1 is preferred since it does not leak from the base material, and when the cosmetic base is applied to the skin, the cosmetic base is transferred well, spreads well on the skin, and uniform application is possible.

That is, the cosmetic base has a shear rate of 0.05 s
The viscosity coefficient η _{1 at} ^-1 is 100 Pas or more and 30000
It is easy to transfer the cosmetic base from the cosmetic-impregnated sheet 1, that the cosmetic base is unevenly distributed in the sheet 1, and that the cosmetic from the sheet 1 is less than Pas, especially 100 Pas or more and less than 10000 Pas. It is preferable from the viewpoint of preventing leakage of the base.

The cosmetic base has a shear rate of 50.0 s.
The viscosity coefficient η _{2 at} ^-1 is 0.1 Pas or more and 100 Pa
When the cosmetic base is applied to the skin, it is preferably less than s, especially 0.5 Pas or more and less than 50 Pas, from the viewpoint of good spread on the skin and uniform application.

Regarding the above η ₁ and η ₂ , both are η ₁ > η ₂
It is preferable to satisfy the relationship from the viewpoint that the cosmetic base easily flows only at the time of an application operation in which a shear stress is applied, and both storage stability and ease of application are compatible. In order to further enhance this effect, η ₁ is preferably 10 to 10,000 times, particularly 50 to 5000 times η ₂ .

The impregnation amount of the cosmetic base is 30 to 350 g /
m ² , particularly preferably 80 to 270 g / m ² , is preferable from the viewpoint that a required amount of the cosmetic can be transferred to the body and face. For the same reason, the cosmetic base is 100 to 800% by weight, especially 200 to 70% by weight based on the weight of the base sheet 2.
It is preferably impregnated with 0% by weight.

The fact that 80% by weight or more, particularly 90% by weight or more of the total amount of the cosmetic base is present in the support sheet 3 is to prevent the uneven distribution of the cosmetic base during storage,
Further, it is preferable from the viewpoint of uniform application of the cosmetic base (hereinafter, this value is referred to as base abundance). In order to make the cosmetic base exist in such a state, the base material 2 may be impregnated with the cosmetic base by a method described later, for example.

The base abundance is measured by the following method. A doctor blade is applied to the support sheet, which is the surface impregnated with the cosmetic base in the cosmetic impregnated sheet, to scrape out the impregnated cosmetic base present on the support sheet. The clearance of the doctor blade is 50 μm. The scraping area is 50 cm ² . The weight of the cosmetic base scraped off by the doctor blade is subtracted from the impregnation amount (weight) of the cosmetic base per scraping area. The value is divided by the impregnation amount (weight) of the cosmetic base per scraping area, and multiplied by 100 to calculate the base abundance.

The component constituting the cosmetic base is water;
Alcohols such as ethanol, isopropanol and cetanol; polyhydric alcohols such as glycerin or sorbitol as humectants; hydrocarbons such as solid or liquid paraffin and squalane; ester oils such as olive oil and carnauba wax; stearic acid and palmitin Higher fatty acids such as acids; sphingosine derivatives of natural injection; tetradecamethylpolysiloxane, methylpolysiloxane,
Polysiloxanes such as methylphenylpolysiloxane; methylpolycyclosiloxane such as okitamethylcyclotetrasiloxane; modified silicones such as polyether / alkyl-modified silicone and alkylglyceryl ether-modified silicone; sulfate-based surfactants and carboxylate-based surfactants Surfactants, ether carboxylic acid surfactants, acylated amino acid surfactants, phosphate surfactants and other anionic surfactants; carbobetaine surfactants, sulfobetaine surfactants, imidazolinium Zwitterionic surfactants such as betaine surfactants; Cationic surfactants such as mono- or dialkyl-added quaternary ammonium salts having a linear or branched alkyl group; polyoxyalkylene-added, poly Oxypropylene, polyoxyethylene Addition type, amine oxide,
Non-ionic surfactants such as mono- or diethanolamides, other sorbitan fatty acid esters, glycerin fatty acid esters, sucrose fatty acid esters, alkyl saccharides, polyhydric alcohols such as N-polyhydroxyalkyl fatty acid amides, and the like. Can be

A powder can be further blended with the cosmetic base. Examples of the powder include extenders such as mica, talc, sericite, kaolin, nylon powder, and polymethylsilsesquioxane; inorganic pigments such as pearls: red 202, red 226, yellow 4, aluminum lake, etc. Organic pigments; inorganic powders for ultraviolet protection such as zinc oxide, titanium oxide, zirconium oxide and iron oxide. These powders are subjected to silicone treatment with methyl hydrogen methylpolysiloxane, trimethylsiloxysilicic acid, methylpolysiloxane, etc., fluorine treatment with perfluoroalkyl phosphate, perfluoro alcohol, etc., lecithin treatment, metal soap treatment, fatty acid treatment. , An alkyl phosphate ester treatment may be performed.

[0021] The cosmetic base may also contain various components which are usually added to cosmetics, quasi-drugs, pharmaceuticals and the like. Examples of such components include inorganic salts such as magnesium sulfate and sodium chloride; viscosity modifiers such as polyvinyl alcohol, carboxymethyl cellulose, and hyaluronic acid; preservatives such as paraben; p-methyl benzylidene, D, L-camphor or Sodium sulfonate, sodium 2-phenylbenzimidazole-5-sulfonate, sodium salt 3,4-dimethylphenylgluoxylate, 4-phenylbenzophenone, 4-phenylbenzophenone-2′-isooctyl carboxylate, Ultraviolet light such as p-methoxycinnamic acid ester, 2-phenyl-5-methylbenzoxazole, p-dimethylaminobenzoic acid ester, 4-t-butyl-4'-methoxybenzoylmethane, benzoylbinacolone derivative, benzoyl ketone derivative Absorbents; allantoin aluminum chlorohydrate, aluminum chloride, aluminum chlorohydrate, allantoin dihydroxy aluminum, aluminum sulfate, potassium alum,
Antiperspirants such as aluminum hydroxide, aluminum zirconium tetrachlorohydroxyglycine, aluminum zirconium pentachlorohydrate, zinc p-phenolsulfonate, salicylic acid, tannic acid; bactericides; pH adjusters; wetting agents; pigments; Perfumes and the like can be mentioned.

Next, the base sheet 2 impregnated with the cosmetic base will be described. As the support sheet 3 constituting the base sheet 2, a support sheet having a structure capable of impregnating a cosmetic base is used. Examples of the support sheet 3 include those having a porous structure and those having a water-absorbing structure. Examples of the carrier sheet 3 having a porous and liquid-absorbing structure include a fibrous structure such as a nonwoven fabric, a cloth, and a knit, a foam,
Nets, three-dimensional molded films, and the like.

In order to improve the impregnation of the cosmetic base, the carrier sheet 3 should have a density of 0.2 to 0.01 g /
cm ³ is preferred. For a cosmetic base having a low viscosity at room temperature (25 ° C., hereinafter referred to as room temperature), the carrier sheet 3 has a density of 0.1 from the viewpoint of impregnation, release and spreadability. It is preferably 2 to 0.06 g / cm ³ .

[0024] Since many cosmetic bases have low surface energy, they are more difficult to hold in a capillary structure than aqueous bases. For this reason, the surface of the support sheet 3 is preferably hydrophobic. Specifically, the contact angle with respect to ion-exchanged water is 70 degrees or more, especially 85 degrees or more,
It is preferable that the degree is not less than the degree because the balance between the impregnating property and the releasing property of the cosmetic base is improved. In this case, even if the carrier sheet has a contact angle exceeding 100 degrees, in the case of a carrier sheet containing an olefin-based (polypropylene-based, polystyrene-based) resin, the cosmetic base easily penetrates,
Since there is a possibility that the components may be separated, the smaller the composition ratio of the resin, the better.

When a cosmetic base having a high viscosity at room temperature (for example, a viscosity at room temperature exceeding 0.5 Pas measured by a B-type viscometer) is used, a foam,
It is preferable to use a three-dimensionally formed film and a fibrous structure having high voids. The reason for this is that a cosmetic base having a high viscosity is hard to impregnate the carrier sheet, and is hardly released from the carrier sheet when the cosmetic base is spread on the skin. In particular, in terms of impregnation, release, and spreadability of the cosmetic base,
The density of the supporting sheet 3 is 0.08 to 0.02 g / cm ³ ,
In particular, it is preferably 0.1 to 0.01 g / cm ³ .

From the viewpoint of the retention of the cosmetic base, the thickness of the carrier sheet 3 is 0.3 to 5 m under a load of 3.7 g / cm ^2.
m, preferably 0.3 to 0.1 from the viewpoint of portability.
More preferably, it is 8 mm.

Of the sheets exemplified as the support sheet 3, it is preferable to use a fibrous structure particularly in view of uniform spreadability and skin feel, and it is more preferable to use a nonwoven fabric in terms of economy. Among them, nonwoven fabrics manufactured by the air-through method, the resin bond method, the spunlace method, and the air-laid method are preferable because of their low density. In particular, it is preferable to use a nonwoven fabric manufactured by a spunlace method, which has a structure in which fibers can easily move, from the viewpoint of uniform spreadability of the cosmetic base on the skin and good skin feel.

When the carrier sheet 3 is composed of a fibrous structure such as a nonwoven fabric, any of hydrophilic fibers and hydrophobic fibers can be used as the fibers. Examples thereof include polyester fibers such as polyethylene terephthalate (PET), acrylic fibers such as polyacrylonitrile, polyamide fibers, polyolefin fibers such as polypropylene (PP) and polyethylene (PE), polyurethane fibers, and polyvinyl alcohol. Synthetic fibers such as synthetic fibers and polyfluoroethylene fibers; natural fibers such as cotton, hemp, wool and silk; regenerated fibers such as rayon, polynosic and cupra; semi-synthetic fibers such as acetate; A fiber composed of a united fiber can be used, and a composite fiber combining two or more of these materials can also be used. These fibers may have an irregular cross section. Further, in consideration of the surface tension of the cosmetic base, the wettability of the fiber, and the diameter of the capillary of the fibrous structure, a plurality of the fibers may be used in combination. However, for the reasons mentioned above,
It is preferable that the content of the polyolefin-based fiber which is very easily compatible with the cosmetic base is 50% by weight or less.

When the cosmetic base is W / O type or O / W type, if water-absorbing fiber is used, when the capillary diameter of the fibrous structure is small, the cosmetic base is converted into oil and moisture. In some cases, the cosmetic base may be separated or the cosmetic base may be difficult to release from the fibrous structure. Therefore, when forming a fiber structure mainly composed of water-absorbing fibers such as cotton, pulp, and rayon, it is preferable that the fiber structure be formed of a nonwoven fabric manufactured by an air laid method having a large capillary diameter. .

When the carrier sheet 3 is made of a fibrous structure such as a nonwoven fabric, the fineness of the constituent fibers is 0.01 to 1
5 denier, especially 0.1 to 12 denier,
It is preferable from the viewpoint of impregnation of the cosmetic base. Most preferably, all of the fibers constituting the nonwoven fabric have a fineness in the above-mentioned range.
If the weight percent or more of the fibers is in the above range, the impregnating property of the cosmetic base becomes sufficiently high. The distance between fibers is 10
It is preferably from 500 μm, particularly preferably from 20 to 300 μm, from the viewpoints of impregnation, release, and spreadability on the skin of the cosmetic base.

The inter-fiber distance Dp (μm) is measured by the following method. Assuming that the thickness of the fiber structure is y (m), the basis weight of the fiber structure is a (g / m ² ), the fineness of the constituent fibers is F (denier), and the diameter of the constituent fibers is fd (μm), The distance Dp is Dp = 0.015 × √ (Fy / a) −fd
Is calculated. The thickness y of the fiber structure is 100 mm × 1
The measurement is performed using a model PF-11 manufactured by Tekrock under the condition that a load of 3.7 g / cm ² is applied to a support sheet having a size of 00 mm. The measurement is performed on five support sheets, and the average value is determined. The diameter fd of the constituent fibers is measured from an enlarged photograph of the fibers taken using a scanning electron microscope, and the average value of five samples is determined. The fineness F is obtained by specifying the type of fiber using a differential scanning calorimeter and determining the density of the specified fiber.
((G / m ³ ), F = π (fd / 2) ² × 9000
(Calculated from

When a foam is used as the carrier sheet 3, the constituent materials thereof include polyurethane resins, olefin resins such as polyethylene and polypropylene, polystyrene resins, polymethyl methacrylate, polyvinyl chloride, polyamide, and unsaturated polyester. Phenolic resins, rubber resins such as polybutadiene and synthetic polyisoprene, and cellulose resins. In particular, it is preferable to use a polyurethane-based resin or a polyolefin-based resin that is soft, has low friction, and has good workability.
When it is desired to increase the amount of impregnation of the cosmetic base, it is preferable that the foam has an open cell type structure rather than a closed cell type

When a three-dimensionally formed film is used as the carrier sheet 3, the film preferably has a three-dimensional aperture structure, and the apparent density in that case is preferably in the above-mentioned range. As a material constituting the film, a polyurethane resin, a polyester resin,
Examples thereof include polyolefin-based resins such as polyethylene and polypropylene, polyamide-based resins, polyvinyl alcohol, and modified products and copolymers thereof. In particular, it is preferable to use linear low-density polyethylene or low-density polyethylene in terms of softness and skin feel.

The support sheet 3 has a basis weight of 10 to 200.
g / m ^2, in particular to be 15~150g / m ^2, that it can a cosmetic base and sufficient impregnation point feel against the skin is good, and from the viewpoint of production costs.

As the liquid impermeable sheet 4, the cosmetic base impregnated in the carrier sheet 3 is the cosmetic impregnated sheet 1.
What can prevent permeation to the flexible sheet 5 during use is used. As a specific example of the liquid impermeable sheet 4, an oil-proof sheet is preferable. For example, general thermoplastic resins, polyester, polyethylene, polypropylene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate copolymer, polyamide, cellophane, polyetherimide, polycarbonate, polyarylate, polysulfone, polyphenylene sulfide And a film made of a resin such as polyetheretherketone. From the viewpoint of heat sealability and flexibility, a partially modified product or copolymer of these resins may be used. The resins may be used in combination of two or more kinds, or may be combined in a laminated structure of two or more layers. Among them, a stretched polypropylene film, a film made of high-density polyethylene and an ionomer resin are preferred because of good workability, and a film made of an ionomer resin is particularly preferred for flexibility, sealing properties, pinhole resistance, and cosmetic base. This is preferred because it has high permeation blocking properties.

The liquid impermeable sheet 4 has a basis weight of 5-1.
00 g / m ² , particularly 10 to 80 g / m ² , is preferable from the viewpoints that the permeation of the cosmetic base can be sufficiently prevented, the feel of the base sheet 2 is maintained, and the production cost.

The flexible sheet 5 is a sheet that comes into contact with the hand when the cosmetic impregnated sheet 1 is used, and is not impregnated with the cosmetic base. As the flexible sheet 5, a sheet having a good texture is used. As such a flexible sheet, a sheet having a cloth-like texture is preferable, and the same sheet as the sheet constituting the support sheet 3 such as a nonwoven fabric, a woven fabric, a knit, a foam, a net, and an apertured film is used. It is preferable to use a nonwoven fabric from the viewpoint of preventing the backing of the cosmetic base, high porosity, and good skin feel.

When a nonwoven fabric is used as the flexible sheet 5, details such as the type, basis weight, constituent fibers, and fineness are the same as those of the nonwoven fabric forming the support sheet 3. In particular, as constituent fibers, hydrophobic fibers such as polyester fibers, acrylic fibers, and polyamide fibers are preferable.

The base sheet 2 composed of the carrier sheet 3, the liquid-impermeable sheet 4 and the flexible sheet 5 may have a basis weight of 15 to 500 g / m ² , particularly 25 to 380 g / m ^2. It is preferable from the viewpoint of balance between texture and manufacturing cost.

The carrier sheet 3, the liquid-impermeable sheet 4 and the flexible sheet 5 are laminated and integrated to form the base sheet 2. FIG. 2 shows a process chart for manufacturing the base sheet 2. As shown in FIG. 2, the base sheet 2 is preferably manufactured by an extrusion lamination method (sandwich lamination method). This method has an advantage that peeling between the sheets hardly occurs and a pinhole is hardly generated in the liquid impermeable sheet 4. The occurrence of pinholes causes the cosmetic base to penetrate into the flexible sheet 5 during use of the cosmetic impregnated sheet 1.

In the method for manufacturing the base sheet 2 shown in FIG. 2, although not particularly limited, for example, the support sheet 3 and the flexible sheet 5 are manufactured in advance in separate steps. This is attached to the device as a raw material 3 ′, 5 ′, and the raw material 3 ′,
The support sheet 3 and the flexible sheet 5 are respectively fed from 5 '. At the same time, the synthetic resin in a molten state is extruded from the T-die 6 into a sheet shape to form the liquid impermeable sheet 4.
The carrier sheet 3 and the flexible sheet 5 are superimposed on both sides of the liquid-impermeable sheet 4 before being solidified, respectively, and sandwiched between the nip rolls 7, 7, so that the base material is formed by laminating these three members. Sheet 2 is obtained.

As another method, the raw sheet 3 'of the supporting sheet 3 or the raw sheet 5' of the flexible sheet 5 is attached to the apparatus, and the supporting sheet 3 or the flexible sheet 5 is fed out. At the same time, the synthetic resin in a molten state is extruded from the T-die 6 into a sheet shape to form the liquid impermeable sheet 4. The carrier sheet 3 or the flexible sheet 5 is superimposed on one side of the liquid impermeable sheet 4 before solidification, and is sandwiched between the nip rolls 7 to 7 to form a laminated sheet in which the two are laminated and integrated. obtain. Next, the flexible sheet 5 or the supporting sheet 3 is superimposed on the surface of the liquid impermeable sheet 4 in the laminated sheet, and the laminated sheet and the flexible sheet 5 or the supporting sheet 3 are laminated and integrated by embossing. 3. The base sheet 2 in which the impermeable sheet 4 and the flexible sheet 5 are laminated and integrated is obtained.

When the same type is used as the supporting sheet 3 and the flexible sheet 5, the following method can be used. First, the carrier sheet 3 (flexible sheet 5) is superimposed on one side of the liquid impermeable sheet 4 before solidification,
A laminated sheet in which these two members are laminated and integrated is obtained. Next, the two laminated sheets are overlapped so that the surfaces of the liquid impermeable sheets 4 in the laminated sheets face each other, and the two laminated sheets are integrated by embossing. Thereby, the base sheet 2 is obtained. The method of embossing used in these methods is not particularly limited, and the embossing can be performed with or without heat under pressure.

In each of the above-described methods, when extruding a synthetic resin in a molten state from the T-die 6 into a sheet to form a liquid impermeable sheet, the purpose is to improve the peeling prevention property.
Multi-layer simultaneous extrusion using two or more T-die
A liquid-impermeable sheet formed by laminating two or more resin layers may be manufactured. In this case, the resin constituting each layer may be the same or different.

The carrier sheet 3 of the base sheet thus obtained is impregnated with a cosmetic base. The impregnation is not limited to the entire surface of the support sheet 3 and may be partial. The impregnation can be performed, for example, by the following method. That is, using a doctor blade, a coating film of the cosmetic base is formed on a flat plate such as a glass plate. The base sheet is placed on the coating film so that the surface of the carrier sheet to be impregnated is in close contact. A roller is applied to the upper surface of the base sheet at a constant speed so that the base sheet and the coating film come into uniform contact, and then the base sheet is peeled off to obtain a cosmetic-impregnated sheet. As the roller, a roller having a constant load is used. If insufficient, apply additional load by hand. If the load is insufficient, the cosmetic base may not be sufficiently impregnated into the base sheet.If the load is excessive, the cosmetic base may be extruded from the base sheet, so that the desired amount of the cosmetic base may be used. It may not be possible to impregnate. It is preferable that the roller be used for a plurality of times to increase the impregnation time, since the cosmetic base can be sufficiently impregnated, and the roller can be evenly impregnated to efficiently transfer the cosmetic base to the skin. . For continuous impregnation, use a roll coater such as a general gravure coater,
As described above, the base sheet may be held in a roll for a long time so as to increase the impregnation time, or the impregnation may be repeated using a plurality of coaters.

The obtained cosmetic impregnated sheet is cut into a predetermined size, folded into a predetermined shape, and wrapped in a pillow package or the like in a state of being stacked in a predetermined number.

The cosmetic-impregnated sheet of the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the base sheet has a three-layer structure. However, depending on the use of the cosmetic impregnated sheet, the base sheet may be a support sheet and a liquid sheet laminated on one surface of the support sheet. It has a two-layer structure made of a permeable sheet, and only the carrier sheet may be impregnated with the cosmetic base. In this case, the details of the support sheet and the liquid impermeable sheet can be the same as in the above-described embodiment.

Further, depending on the use of the cosmetic impregnated sheet, the base sheet may be composed only of the carrier sheet, and only one surface of the carrier sheet may be substantially impregnated with the cosmetic base. In this case, the details of the support sheet can be the same as in the above embodiment. In order to impregnate only one surface of the carrier sheet with the cosmetic base, for example, a base having appropriate flow characteristics as the cosmetic base may be used.

[0049]

EXAMPLES In the following examples, "%" and "parts" mean "% by weight" and "parts by weight", respectively, unless otherwise specified.

Example 1 (1) Preparation of Cosmetic Base An O / W cream (emulsion base) was prepared using the following formulation. First, an aqueous phase excluding ethanol was added to the oil phase heated to 70 ° C., and cooled to room temperature over 20 minutes with stirring. Then add ethanol and stir for a further 10 minutes.
/ W cream was obtained. The obtained O / W cream (cosmetic base) exhibited thixotropic properties, and its viscosity coefficients η ₁ and η _{2 at} 25 ° C. were measured with a rheometer (Rheometrics, Fluids Spectromter RFS-11). The results are shown in Table 1 below.

Liquid paraffin 8.0 parts Neopentyl glycol dicaprate 2.0 parts 1,3 butylene glycol 6.0 parts Polyethylene glycol 4.0 parts Carboxyvinyl polymer 0.5 parts Acrylic acid / alkyl methacrylate copolymer 0 0.2 parts Sodium hydroxide aqueous solution (50%) 0.3 parts Methyl parahydroxybenzoate 0.5 parts Ethanol 15.0 parts Purified water 63.5 parts 100.0 parts

(2) Production of base sheet The carrier sheet and the flexible sheet shown in Table 1 were produced in advance, and these sheets and the raw material resin of the liquid impermeable sheet shown in Table 1 were used. The base sheet was obtained by the extrusion lamination method shown in FIG. Details of each sheet are as shown in Table 1.

(3) Production of Cosmetic Impregnated Sheet The O / W cream obtained by the above method was placed on a flat glass plate, and a coating film of the O / W cream was formed using a doctor blade. This substrate sheet was placed on the coating film so that the surface of the carrier sheet in the substrate sheet cut to 150 mm x 100 mm was in close contact with the coating film. Using a roller having its own weight of 180 g and applying a further load of about 50 g by hand, the base sheet and the coating film are uniformly contacted by applying the roller eight times (at a speed of 300 mm / s) on the upper surface of the base sheet. After that, the substrate sheet was peeled off. This operation was repeated twice to produce a cosmetically impregnated sheet. 3
g of the cosmetic base (base impregnation amount 200 g / m ² ) was impregnated into the base sheet.

Example 2 A W / O UV protection cream was prepared using the following formulation. First, the powder was uniformly dispersed in the oil phase heated to 80 ° C. Next, the aqueous phase heated to 70 ° C. was slowly added, and the mixture was cooled to room temperature over 20 minutes with stirring to obtain a W / O cream. Obtained W /
O cream (cosmetic base) shows thixotropic properties,
The viscosity coefficients η ₁ and η _{2 at} 25 ° C. were as shown in Table 1 below. Thereafter, a cosmetic impregnated sheet was obtained in the same manner as in Example 1. However, the material of the base sheet and the base impregnation amount were as shown in Table 1.

Liquid paraffin 12.0 parts Silicone oil 5.0 parts Glycerin fatty acid ester 1.0 parts Aluminum distearate 1.5 parts Polysiloxane copolymer 1.5 parts 1,3 butylene glycol 2.0 parts Polyethylene glycol 0 0.5 parts Methyl parahydroxybenzoate 0.5 parts Magnesium sulfate 0.5 parts Zinc oxide 8.0 parts Titanium oxide 7.0 parts Purified water 60.5 parts 100.0 parts

Example 3 An oily foundation (oily base) was prepared using the following formulation. First, powder was added to the oil phase heated to 80 ° C. while being uniformly dispersed,
Stir for minutes. Thereafter, stirring was stopped and the mixture was cooled to room temperature to obtain an oily foundation. The obtained oily foundation (cosmetic base) exhibits thixotropic properties,
The viscosity coefficients η ₁ and η _{2 at} ° C. are as shown in Table 1 below. Thereafter, a cosmetic impregnated sheet was obtained in the same manner as in Example 1. However, the material of the base sheet and the base impregnation amount were as shown in Table 1.

Liquid paraffin 34.29 parts Vaseline 30.00 parts Purified lanolin 20.00 parts Dextrin palmitate 10.00 parts Butyl paraoxybenzoate 0.10 parts Dibutylhydroxytoluene 0.01 parts Talc 5.00 parts Black iron oxide 0.20 parts Red iron oxide 0.30 parts Yellow iron oxide 0.10 parts 100.00 parts

Example 4 A lipstick base was prepared using the following formulation. First, the powder is added to the oil phase heated to 80 ° C. while being uniformly dispersed, and the mixture is stirred for 20 minutes. Thereafter, stirring was stopped and the mixture was cooled to room temperature to obtain a lipstick base. The obtained lipstick base (cosmetic base) shows thixotropic properties,
The viscosity coefficients η ₁ and η _{2 at} 25 ° C. were as shown in Table 1 below. Thereafter, a cosmetic impregnated sheet was obtained in the same manner as in Example 1. However, the material of the base sheet and the base impregnation amount were as shown in Table 1.

Liquid paraffin 37.68 parts Vaseline 20.00 parts Microcrystalline wax 20.00 parts Purified lanolin 10.00 parts Dextrin palmitate 10.00 parts Butyl paraoxybenzoate 0.10 parts Dibutylhydroxytoluene 0.01 parts Ceramide 2.00 parts Red No.4 aluminum lake 0.08 parts Yellow No.4 aluminum lake 0.03 parts Mica / titanium oxide 0.10 parts 100.00 parts

[Examples 5 and 6] The base sheet shown in Table 1 was impregnated with the O / W cream (emulsifying base) used in Example 1 in the same manner as in Example 1 to impregnate the cosmetic. I got a sheet. The base impregnation amount was as shown in Table 1.

Comparative Example 1 A skin care paste was prepared using the following formulation. First, the powder is added to the oil phase heated to 80 ° C. while being uniformly dispersed, and the mixture is stirred for 20 minutes.
Thereafter, stirring was stopped and the mixture was cooled to room temperature to obtain a skin care paste. The viscosity coefficients η ₁ and η ₂ at 25 ° C. of the obtained skin care paste (cosmetic base) were as shown in Table 1 below. This skin care paste did not have thixotropic properties. Thereafter, a cosmetic impregnated sheet was obtained in the same manner as in Example 1. However, the material of the base sheet and the base impregnation amount were as shown in Table 1.

Liquid paraffin 39.68 parts Solid paraffin 20.00 parts Microcrystalline wax 20.00 parts Purified lanolin 10.00 parts Dextrin palmitate 10.00 parts Butyl paraoxybenzoate 0.10 parts Dibutylhydroxytoluene 0.01 parts 100.00 parts

Comparative Example 2 A W / O emulsion was prepared using the following formulation. First, 70 ° C was added to the oil phase heated to 80 ° C.
The heated aqueous phase was added slowly. Then, the mixture was cooled to room temperature over 20 minutes with stirring to obtain a W / O emulsion.
The viscosity coefficients η ₁ and η ₂ at 25 ° C. of the obtained W / O emulsion (cosmetic base) were as shown in Table 1 below. This W / O emulsion did not have thixotropic properties. Thereafter, a cosmetic impregnated sheet was obtained in the same manner as in Example 1. However, the material of the base sheet and the base impregnation amount were as shown in Table 1.

Liquid paraffin 2.0 parts Silicone oil 36.0 parts Polysiloxane copolymer 2.5 parts 1,3 butylene glycol 2.0 parts Polyethylene glycol 0.5 parts Methyl parahydroxybenzoate 0.5 parts Magnesium sulfate 0 5.5 parts Purified water 56.0 parts 100.0 parts

[Evaluation of Performance] With respect to the impregnated sheets obtained in Examples and Comparative Examples, usability, storage stability and transferability were evaluated by the following methods. Table 1 shows the results.

[Feeling of use] The arms and necks of ten specialized panelists were wiped with an impregnating sheet, and a cosmetic base was applied to the skin to improve the feeling of use of the impregnated sheet from the viewpoint of ease of spreading and non-stickiness. evaluated. The number of persons who judged that the ease of spreading or the lack of stickiness was poor was evaluated as ○ when the number was 5 or less, and evaluated as × when the number was 6 or more.

[Storage stability] The impregnated sheet was placed on its short side (1
(00 mm) were folded in three (C-fold) so that they abut each other, and ten sheets were stacked as a set. In this state, it was put in a pillow container containing aluminum as a main component, and stored at 40 ° C. and 50 ° C., respectively. When saving
The pillow container was placed vertically so that the short side (75 mm) of the three-folded sheet was in the vertical direction. After a lapse of one month, the impregnated sheet was taken out of the pillow container, and the storage stability was evaluated from the viewpoint of base dripping and backing of the base. The base was evaluated by cutting the impregnated sheet folded and folded vertically into three halves, and measuring the weight of each cut. The case where the weight of the upper portion became 70% or more of the weight of the lower portion was evaluated as ○, and the case where the weight became less than 70% was evaluated as ×. The back of the base was evaluated based on the height of the base that spread upward from the edge of the back surface of the impregnated sheet. The case where the height of the base material bleeding from the edge of the sheet was less than 10 mm was evaluated as ○, and the case where the height was 10 mm or more was evaluated as x.

[Transferability] The arm and neck of ten professional panelists were wiped with an impregnated sheet, and the cosmetic base was applied to the skin. In order to spread the base on the skin, the application was repeated several times and the base was gently spread, and the end point was determined when the transfer of the base was no longer felt. The weight of the impregnated sheet before and after the application was measured, and the case where the weight of the impregnated sheet after the application was 75% or less of the weight of the impregnated sheet before the application was evaluated as ○, and the case where the weight exceeded 75% was evaluated as ×.

[0069]

[Table 1]

As is evident from the results shown in Table 1, the impregnated sheets of the respective Examples easily spread the cosmetic base on the skin.
It turns out that there is no sticky feeling at that time. In addition, it can be seen that the impregnated sheet of each example does not unevenly distribute the cosmetic base or leak from the base sheet even when stored. Further, it can be seen that the transferability of the cosmetic base to the skin is good.

[0071]

According to the cosmetic impregnated sheet of the present invention, a cosmetic base having thixotropic properties can be uniformly applied to the skin. Further, according to the cosmetic impregnated sheet of the present invention, a cosmetic base having thixotropic properties can be quickly applied to a large area even in a small amount. Furthermore, according to the cosmetic impregnated sheet of the present invention, there is no possibility that the base material is unevenly distributed during storage or leaks out of the base material sheet and goes around to the back surface (non-impregnated surface) side. Further, according to the cosmetic impregnated sheet of the present invention, the base is prevented from adhering to the hands during use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a cosmetically impregnated sheet of the present invention.

FIG. 2 is a process chart showing a method for producing a base material sheet.

[Explanation of symbols]

 Reference Signs List 1 cosmetic impregnated sheet 2 base sheet 2 'base sheet 3 support sheet 3' support sheet 4 liquid impermeable sheet 5 flexible sheet 5 'flexible sheet raw 6 T die 7 nip roll

[Procedure amendment]

[Submission date] May 11, 2001 (2001.5.1
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

High viscosity at room temperature (for example, measured with a B-type viscometer)
Cosmetics whose viscosity at defined room temperature exceeds 0.5 Pas)
When using a base, a foam,
It is possible to use three-dimensional molded film and high void fiber structure
preferable. The reason is that the cosmetic base with high viscosity
Difficult to impregnate the sheet and spreads the cosmetic base on the skin
Because it is hard to be released from the carrier sheet when
You. In particular, in terms of impregnation, release, and spreadability of the cosmetic base,
The density of the carrier sheet 3 is0.1-0.01g / cm ^Three, Special
To0.08-0.02g / cm^ThreePreferably
No.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

The inter-fiber distance Dp (μm) is measured by the following method.
Is determined. The thickness of the fiber structure is y (m),
A (g / m^Two), The fineness of the constituent fibers is F (Denny
F), if the diameter of the constituent fibers is fd (μm),
The distance Dp is Dp = 0.015 × √ (Fy / a) −fd
Is calculated. The thickness y of the fiber structure is 100 mm × 1
3.7 g / cm on a support sheet of size 00 mm^TwoNo load
Using Teklock model PF-11 under heavy load
And measure. The measurement was performed on five carrier sheets,
Find the average value of The diameter fd of the constituent fiber is a scanning electron microscope.
Measured from an enlarged photograph of the fiber taken with a microscope,
The average value of the number of samples 5 is determined. Fineness F is the differential scanning calorie
The type of fiber is specified using a meter, and the density of the specified fiber
ρ(G / m ^Three) And F = π (fd / 2)^Two× 9000
ρIs calculated from

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Manabu Kaneda 2606 Kabane-cho, Akaga-cho, Haga-gun, Tochigi Prefecture Inside the Kao Corporation Research Institute 72) Inventor Junichi Fukasawa 4-11-36 Toyo, Koto-ku, Tokyo Unagawa Building 2 Bear Kao Co., Ltd. Terms (reference) 4C083 AB032 AB212 AB232 AB242 AB362 AC012 AC022 AC102 AC122 AC242 AC392 AC422 AC472 AC482 AC642 AC852 AD042 AD092 AD152 AD242 AD512 BB60 CC01 CC12 DD12 DD32 DD33 EE01 EE06 EE07 EE11

Claims (9)

[Claims] 1. A cosmetic-impregnated sheet obtained by impregnating substantially only one surface of a base sheet with a base having thixotropic properties. 2. The substrate sheet according to claim 1, wherein the base sheet comprises a support sheet and a liquid-impermeable sheet laminated on one surface of the support sheet, and only the support sheet is impregnated with the base. Cosmetic impregnated sheet. 3. The carrier sheet, a liquid-impermeable sheet laminated on one surface of the carrier sheet, and a liquid-impermeable sheet laminated on a surface of the liquid impermeable sheet opposite to the carrier sheet facing surface. The cosmetic-impregnated sheet according to claim 1, comprising a flexible sheet, wherein only the carrier sheet is impregnated with the base. 4. A 25 ° C., the base may include, viscosity coefficient eta ₂ is more than 0.1Pas at and a shear rate of 50.0s ^-1 viscosity coefficient eta ₁ is less than 30000Pas than 100Pas at a shear rate of 0.05 s ^-1 The cosmetic-impregnated sheet according to any one of claims 1 to 3, wherein the sheet satisfies a relationship of less than 100 Pas, and furthermore,? ₁ >? ₂ . 5. The cosmetic-impregnated sheet according to claim 2, wherein the liquid-impermeable sheet comprises a stretched polypropylene film or an ionomer resin film. 6. The carrier sheet is made of a fiber material, the fineness of the fiber material is 0.01 to 15 denier, and the basis weight of the carrier sheet is 10 to 200 g / m ^2. 6. The cosmetic impregnated sheet according to any one of items 1 to 5. 7. A base sheet having a support sheet and a liquid-impermeable sheet laminated on one surface of the support sheet, and used for impregnating a base having thixotropic properties. 8. The base sheet according to claim 7, further comprising a flexible sheet laminated on a surface of the liquid impermeable sheet opposite to the surface facing the support sheet. 9. The carrier sheet comprises a fibrous structure,
The base sheet according to claim 7 or 8, wherein a distance between fibers of the fiber structure is 10 to 500 µm.