HK1018221B - A peel-off-type sheet pack - Google Patents

Description

Peeling type face pack

Field of the invention

The invention relates to a peel-off mask.

Background

A peel-off mask is a film-forming cosmetic product that is applied to the skin, formed into a film over a period of time, and then peeled off from the skin.

The peel-off mask itself generally provides moisture and water retention components to the stratum corneum of the skin while absorbing sebum from the skin. The peel-off mask forms a film on the skin, and can impart appropriate tension to the skin and improve blood circulation. When the peel-off mask is peeled off from the skin, the mask removes dust and keratotic waste on the skin.

Therefore, the peel-off type mask has a high moisturizing effect and an excellent cleansing effect.

Known peel-off masks are in the form of a gel, paste or powder. Wherein the gel-like and cream-like facial mask can be directly applied on skin to form a film, and then peeled off from the skin. The powdery mask is mixed with a liquid (such as water) in advance, and then applied to the skin and peeled off from the skin.

In a conventional peel-off mask, a cosmetic material constituting the mask is generally applied to the skin by fingers. This application method necessarily leaves the finger with some of the substance, which is wasteful and can soil the finger. Another problem is that the mask is difficult to apply evenly on the skin surface.

In addition, after the mask is applied to the skin, a long time is required for complete film formation. This causes troubles in skin care using the mask.

The application of standard amounts often results in a mask with insufficient tensile strength, which tears during peeling and leaves the mask on the skin. In order to prevent the mask from being unduly remained on the skin, it is effective to form a thick film using a large amount of the mask. But this will further extend the time required for the mask to completely form a film after application to the skin.

Various kinds of release type masks have been recently used to solve the above problems. One is an aqueous peeling type mask which is mainly composed of a water-soluble polymer and water; for example, Japanese patent laid-open publication No. 58-180408 discloses a release type mask in which an aqueous crosslinked gel composed of a polyacrylate and a crosslinking agent is applied to a nonwoven fabric, Japanese patent laid-open publication No. 2-145505 discloses an aqueous release type mask composed of alginic acid, a water-soluble polymer and a crosslinking agent as essential components, and Japanese patent laid-open publication No. 6-48917 discloses a multi-layer cover type mask in which a top layer is protected by a barrier layer (plastic liner) and each layer contains a different cosmetic substance.

The other is a dry peel-off type mask which is composed of a film formed by coating and drying a cream-like film-forming cosmetic substance comprising a water-soluble polymer and water as main components; for example, Japanese patent laid-open publication No. 58-216109 discloses a dry film-like cosmetic product which is mainly composed of a water-soluble polymer including a medicinal or cosmetic substance (e.g., vitamin C). A cosmetic mask comprising a dried sheet of a paste (e.g., sodium polyacrylate) or a dispersion layer in which fine powder of the paste is dispersed on the surface of a film is disclosed in japanese laid-open patent publication No. 60-165902. Japanese patent laid-open publication No. 3-294213 discloses a release type mask comprising a polymer which is soluble or swellable with water and a nonaqueous solvent, and a polymer which is soluble or swellable only with a nonaqueous solvent as essential components. In Japanese laid-open patent publication No. 5-194180, a release type mask cosmetic is disclosed, which comprises polyvinyl alcohol, another polymer and a polyhydric alcohol. Japanese patent laid-open publication No. 6-65048 discloses a facial mask having a water content of not more than 25% by weight, which contains sodium alginate and a polyhydric alcohol. Before use, water or cleaning lotion is added to the dry facial mask.

These proposed release masks are easier to handle than conventional masks, but still have some disadvantages such as surface stickiness at the time of use, unintended breakage of the mask during the release process, and the mask remaining on the skin surface, which are not satisfactory. Another problem with the peel-off mask is that the time required to completely form the film is long.

European patent publication 309309 discloses a release material comprising a web material having a film of hydratable gel enclosed within pores of the web. The gel used has absorption properties for moisture on a wetted skin surface; when the gel is in a partially rehydrated state, it softens the mesh surface and allows it to fit around irregularities in the body.

European patent publication No. 514760 discloses a composition for removing horn wastes containing a polymer having salt-forming groups.

The object of the present invention is to provide an improved release mask which is not sticky on the surface, requires a short time for complete film formation, is not easily broken during the release process, and does not remain on the skin surface.

These and other objects of the present invention will be apparent from the following description.

Disclosure of the invention

The invention provides a peel-off mask, which comprises a multi-layer water-permeable carrier containing a hydrophobic layer and a hydrophilic layer, and a cosmetic substance.

The present invention also provides a method of applying the above-mentioned peel-off mask on the skin, comprising (a) moisturizing the skin, and (B) applying the peel-off mask on the moisturized skin.

Brief description of the drawings

FIG. 1 is a schematic cross-sectional view of a peel-off mask of the present invention;

FIG. 2 is a schematic cross-sectional view of a conventional peel-off mask;

FIG. 3 is a schematic cross-sectional view of another conventional peel-off mask;

FIG. 4 is a schematic cross-sectional view of another conventional peel-off mask;

FIG. 5 is a schematic diagram of a method of measuring the water pressure resistance of a peel-off mask;

FIG. 6 is a schematic view of a generally triangular peel-away mask of the present invention and an embodiment thereof;

FIG. 7 is a schematic view of a T-shaped peel-away mask of the present invention and an embodiment thereof;

fig. 8 is a schematic view of a U-shaped peel-off mask and a specific embodiment thereof according to the present invention.

Best Mode for Carrying Out The Invention

The peel-off mask of the present invention comprises a multi-layer water permeable support comprising a hydrophobic layer and a hydrophilic layer. The hydrophilic layer of the multi-layered water permeable support contains a cosmetic substance-forming film. The peel-off mask of the present invention provides a mask having excellent tensile strength, which is not easily broken when peeled off, and which does not remain on the skin surface when peeled off. The surface of the multi-layer water-permeable carrier of the peel-off facial mask is a hydrophobic layer, so that the peel-off facial mask is not sticky. The multi-layered water permeable support of the peel-off type mask has excellent water permeability. This effectively reduces the time required for the cosmetic substance applied to the skin to dry. Especially for cosmetic materials having film-forming properties, the time required for complete film formation after application of the peel-off mask to the skin can be shortened.

In addition, according to the method of applying the peel-off mask pack to the skin in the present invention, the mask pack is applied to a specific part of the skin after the specific part of the skin is wetted with water or a cleansing lotion. The cosmetic substance contained in the peel-off mask is soluble in moisture that moisturizes the skin, resulting in a low viscosity solution. The solution can penetrate into skin tissue and pores. The peel-off mask thus more closely adheres to the skin and improves the effects of the present invention, particularly the removal of keratotic waste.

Particularly, when the peel-off mask contains a cosmetic substance in a dry state, the time required for complete film formation after the peel-off mask is applied to the skin can be shortened.

As described above, the peel-off mask of the present invention comprises a multi-layered water permeable support comprising a hydrophobic layer and a hydrophilic layer in addition to a cosmetic substance.

The multi-layer water permeable support of the peel-off mask typically comprises a bilayer structure, i.e., a hydrophobic layer and a hydrophilic layer. In the solution shown in fig. 1, the cosmetic substance 4 is present in the hydrophilic layer 2 of a multi-layer water-permeable support 1, which multi-layer water-permeable support 1 is constituted by the hydrophilic layer 2 and by the hydrophobic layer 3. It can be seen that the hydrophilic layer 2 is impregnated with the cosmetic substance 4, and a portion thereof also penetrates into the hydrophobic layer 3. That is, the hydrophilic layer 2 is impregnated with the cosmetic substance 4. The hydrophobic layer 3 is superposed on the hydrophilic layer 2 to form the surface layer of the peeling type mask 5.

The structure of the multi-layer water-permeable carrier and the structure of the peel-off facial mask containing the multi-layer water-permeable carrier are obviously different from the structure of the conventional peel-off facial mask adopting non-woven fabrics as carriers. Fig. 2 to 4 are structures of a prior art peel-off mask. The structure of the peel-off mask of the present invention is greatly different from the conventional peel-off mask shown in fig. 2, in which a hydrophobic carrier 6 is simply covered on a cosmetic material layer 7 in the mask of fig. 2, while a hydrophilic carrier 8 is impregnated with a cosmetic material 7 in another conventional mask shown in fig. 3, and a hydrophobic carrier 6 is partially impregnated with a cosmetic material in another conventional mask shown in fig. 4.

In the present invention, as shown in fig. 1, a multi-layered water-permeable support 1 comprises a water-repellent layer 3 and a hydrophilic layer 2. The multi-layered water-permeable support 1 should have water permeability so as to dry the cosmetic material or to completely form a film in a short time. Suitable materials for the multi-layer water-permeable support 1 are, for example, fiber fabrics, fabric laminates, and films or papers. The hydrophobic layer 3 and the hydrophilic layer 2 are not necessarily formed of a single hydrophobic material and a single hydrophilic material, respectively. The hydrophobic layer and the hydrophilic layer may also be composed of a mixture of a hydrophobic material and a hydrophilic material, as long as the hydrophobic layer has hydrophobic characteristics and the hydrophilic layer has hydrophilic characteristics capable of generating sufficient affinity for the cosmetic substance.

Materials suitable for use as the multi-layer water permeable support may be treated to have hydrophobic or hydrophilic properties to meet the needs of the individual case. The hydrophobic and hydrophilic layers may also be treated with surfactants selected from the group consisting of: fatty acid ester nonionic surfactant, polyglycerin fatty acid ester, alkyl ether sulfate, higher alcohol sulfate, alkyl phosphate metal salt and mixtures thereof.

When a fiber fabric is used as the multi-layer water permeable support, the hydrophobic layer may be composed of hydrophobic synthetic fibers made of polymers such as polyester, polyethylene, polypropylene or polyurethane or inorganic fibers.

The hydrophilic layer may be formed from hydrophilic fibrous materials, such as natural fibres, for example cotton, linen or wool, or from cellulosic fibres, such as rayon or acetate. As mentioned above, the present invention may also employ a mixture of hydrophilic fibers and hydrophobic fibers made from a polymer, such as polyester, polyethylene, polypropylene, or polyurethane. The content of the hydrophilic fiber in the hydrophilic layer is preferably not less than 5% by weight, more preferably not less than 10% by weight. The hydrophilic layer may also be comprised of the hydrophobic fibers described above, which may be treated with a surfactant selected from the group consisting of metal alkylphosphates, silicone compounds, acrylate compounds, fluorine-containing compounds, and mixtures thereof to impart hydrophilic properties to the hydrophobic fibers.

Preferably, the fibers have a diameter of from a few microns to about 50 microns. To prevent the cosmetic substances from exuding and to ensure a pleasant feel of the release mask, it is more preferable that the fiber diameter is not more than 30 μm. Plied and spun staple fibers having a diameter of 5-20 microns are also suitable for use as the fibers of the invention.

It is also desirable that the fiber have a fineness of about 0.01 to 15, preferably about 0.01 to 3.

Textiles, knits, nonwovens and combinations thereof may be used as the fabric of the present invention. Among them, nonwoven fabrics are preferably used from the viewpoint of cost, productivity and hand.

When a nonwoven fabric is used as the hydrophilic layer, in order to prevent the cosmetic substance from permeating from the hydrophilic layer into the hydrophobic layer, it is required that the water-repellent pressure on the hydrophilic layer side of the multi-layer water-permeable support is preferably not less than 0.1 g/cm, more preferably not less than 0.2 g/cm, particularly preferably not less than 2 g/cm. The water-proof pressure was measured in the following manner.

As shown in FIG. 5, a nonwoven fabric 11 was fixed to a circular tube 9 having a cross-sectional area of 9.6 cm square with a rubber packing 10, and ion-exchanged water 12 was poured through an inlet at the upper end of the circular tube 9 at a rate of 4 g/min. The time required for the ion-exchanged water to reach the tail end of the round tube 9 through the nonwoven fabric 11 was measured, and the water-proof pressure was calculated according to the following formula:

[ waterproof pressure (g/cm) in [ time (sec) ] x (4 g/60 sec)/9.6 cm in square

The water permeability of the fabric depends on its porosity. The low porosity reduces the drying rate of the cosmetic material and causes air pollution when producing the peel-off mask, particularly when impregnating the fabric sheet with the cosmetic material. On the other hand, high porosity may reduce the mechanical strength of the resulting peel-off mask, and may cause cosmetic substances to remain on the skin when the mask is peeled off from the skin. The porosity is therefore preferably from 70 to 99%, more preferably from 85 to 99%. Porosity is characterized by the following formula:

[ porosity (%) ] ═ rho-rho') × 100/rho

Where ρ is the specific gravity of the multi-layer water-permeable carrier and ρ' is the apparent specific gravity of the multi-layer water-permeable carrier.

A lower thickness of the hydrophilic layer may decrease the retention characteristics of the cosmetic material and the strength of the film, and may cause the cosmetic material to remain on the skin when the mask is peeled off from the skin. On the other hand, a higher thickness of the hydrophilic layer increases the amount of cosmetic substance applied to the skin and increases the time required for the cosmetic substance to dry or completely form a film.

Too low thickness of the hydrophobic layer causes cosmetic substances to ooze out of the hydrophobic layer and makes the surface sticky when the peel-off mask is applied on the skin. On the other hand, too high a thickness of the hydrophobic layer may prevent the finished mask from conforming to the skin contours.

When the new aqueous layer and the hydrophobic layer are each formed of a fabric, it is required that each layer has a thickness of 20 to 2000. mu.m, preferably 30 to 1500. mu.m.

When the hydrophilic layer and the hydrophobic layer are each formed of a fabric, it is required that the thickness of the entire multi-layer water-permeable support is preferably 40 to 2000 μm, more preferably 50 to 1500. mu.m, and the weight per unit area of the entire multi-layer water-permeable support is preferably 4 to 200 g/m, more preferably 5 to 150 g/m.

It is also preferred that the fabric have stretch properties to allow the peel-off mask to conform to the contours of the skin. The stretching ratio is preferably not higher than 100% because too high stretching ratio may reduce the film-forming strength of the cosmetic material and its peeling property.

The stretch of the fabric depends on the material. Fabrics with preferred stretch ratios include fabrics made from melt spun or wet spun styrene thermoplastic elastomers (TPE), such as styrene-isoprene-styrene elastomers (SIS), styrene-butadiene-styrene elastomers (SBS), styrene-ethylene-butadiene-Styrene Elastomers (SEBS), and styrene-ethylene-propylene-Styrene Elastomers (SEPS); textiles and knits made from fibers or plied yarns thereof composed of olefinic TPEs, such as ethylene-propylene copolymers (EPM), ethylene-propylene-crosslinkable diene monomer (e.g., ethylidene norbornene) terpolymers (EPDM), vinyl chloride TPEs, polyurethane TPEs, ester TPEs, amide TPEs, and other TPEs, as well as textiles or knits made from these fibers or other fiber materials.

Examples of suitable nonwoven fabrics include spunbond fabrics made of meltblown or spunbond TPE, nonwoven fabrics made by spunlacing or water jet processes, and nonwoven fabrics made of core-sheath or side-by-side conjugate fibers comprising two different polymers selected from olefin resins, polyester resins, polyamide resins and other resins, which are needle punched or spunlaced, or conjugate fibers which are embossed and bonded under heat or ultrasonic conditions and then shrunk (microcreped) with hot air to form a textured structure.

The fabric may be stretched and deformed in an isotropic or anisotropic manner.

In addition to the fabrics described above, various other materials are also suitable for use in the multilayer water permeable support of the present invention. When a fabric having insufficient mechanical strength or water permeability is adjusted, a fabric laminate or film produced by a heat lamination method or a heat spunbond method may be used for the multi-layer water permeable carrier.

Materials that can be used as the film include diene polymers such as natural rubber, isoprene rubber, and butadiene rubber; polyolefins such as polyethylene and polypropylene; polyamides such as nylon-66, nylon-6 and nylon-12, vinyl or vinylidene polymers such as polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, polyacrylonitrile and polymethyl methacrylate; polyesters such as polyethylene terephthalate and polybutylene terephthalate; ethylene copolymers such as ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers and ethylene-acrylic ester copolymers; polyacetates, polyurethanes, and modified compounds or mixtures thereof. Styrenic thermoplastics TPE such as SBS, SEBS and SEPS, olefinic TPEs such as EPM and EPDM, vinyl chloride TPE, polyurethane TPE, ester TPE, amide TPE and other TPEs may also be used to enhance their stretchability.

The water-permeable film can be made of a film material prepared by the following method: one method is to knead and mold the above resin as a film-forming material with an inorganic or organic filler in a molten state into a sheet shape, and stretch the sheet; one method is to disperse a resin incompatible with the above resin in a molten state without using the above filler, mold it into a sheet form, and stretch it to obtain a water-permeable sheet; one method is to knead the above resin as a film-forming material with an oily component in a molten state without using the above filler, mold it into a sheet, and stretch it to obtain a water-permeable sheet; one method comprises kneading the above resin as a film-forming material together with an oily component or a wax component, molding into a sheet, and extracting the oil or wax to remove it, and one method comprises sintering the above resin as a film-forming material; one method is to mold the resin as film forming material into sheet and to form holes in the sheet with a discharge machine. A mixture of the thermoplastic elastomer and the water-soluble component, salt and polyvinyl alcohol may be molded into a sheet form, and the additives (e.g., the water-soluble component) are removed from the sheet by extraction to produce a foamed sheet, which is also one example of a suitable water-permeable film material. Other suitable examples are water-permeable resin sheets made of polyurethane elastomer and ester elastomer, polyvinyl alcohol or cellophane. When a substantially water impermeable sheet is used, small through holes can be made in the film to make it water permeable.

The water permeability of the film can be measured by the measurement method specified in JIS Z0208. In order to prevent the cosmetic substances from exuding and to ensure a pleasant feel of the peel-off mask, the water permeability is required to be not higher than 10000 g/m/24 hours. In order to increase the drying rate of the cosmetic material, the water permeability is required to be not less than 100 g/m/24 hours.

Too low a film thickness may reduce the improvement in film strength, and may break the film when the mask is peeled off from the skin and leave cosmetic materials on the skin. On the other hand, too thick a film may prevent the finished mask from conforming to the skin contour and may also increase the production cost. It is generally preferred that the film have a thickness of about 20 to 50 microns.

The fabric and film are laminated using known methods. For example, one method is to thermally laminate the above-mentioned fabric or resin film dissolved in a solvent or hot melt, and to bond the film to the fabric by hot-melt using a hot-melt adhesive; one method is to bond the film to the fabric using ultrasound or using a heat and pressure process.

Examples of suitable cosmetic materials include various film-forming cosmetic materials commonly used in peel-off masks, and aqueous gel cosmetic materials used in poultices. The cosmetic material may be in the form of a paste with sufficient moisture or in a dry state. In the latter case, moisture is added to the cosmetic material before use.

The film-forming agent in the film-forming cosmetic substance may be, for example, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate emulsion or carboxymethyl cellulose. The thickening agent in the film-forming cosmetic material may be pectin, gelatin, xanthan gum, carrageenan, sodium alginate, pullulan, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose or a carboxyvinyl polymer.

The film-forming cosmetic material may further contain various ingredients such as a moisturizing ingredient, a sebum-absorbing ingredient or an ingredient for removing keratotic waste, depending on the use thereof.

When the film-forming cosmetic substance is an ingredient for moisturizing, the film-forming cosmetic substance may contain, for example, a humectant. Examples of suitable humectants include, for example, ethylene glycol, polyethylene glycols such as diethylene glycol and triethylene glycol; propylene glycol, polypropylene glycol such as dipropylene glycol, butylene glycols such as 1, 3-butylene glycol and 1, 4-butylene glycol; glycerol, polyglycerols such as diglycerol, sugar alcohols such as sorbitol, mannitol, xylitol and maltitol, monosaccharides such as galactose, glucose and fructose, and polysaccharides such as maltose and lactose. Examples of usable oil components (emollient components) include hydrocarbons such as liquid paraffin, squalane and paraffin wax, natural oils such as olive oil, jojoba oil, evening primrose oil, palm oil and beef tallow, esters such as isopropyl myristate, cetyl isooctanoate and neopentyl glycol didecanoate, silicone oils such as methyl polysiloxane, methyl polycyclosiloxane and tolyl polysiloxane, and higher fatty acids such as isostearic acid and oleic acid.

When the film-forming cosmetic material is a component that absorbs sebum, the film-forming cosmetic material may contain, for example, a sebum absorber. Examples of suitable sebum absorbers include, for example, kaolin, clay, bentonite, calcium carbonate, titanium dioxide, zinc oxide and silica.

When the film-forming cosmetic substance is a component for removing keratotic waste, it is preferable to use a polymer containing an anionic, cationic or amphoteric salt-forming group disclosed in Japanese patent laid-open publication No. 5-97627 as a film-forming agent so as to form a film having a high film strength so that the keratotic waste on the skin can be absorbed into the film and removed therefrom. More specifically, it is desirable that the polymer has a salt-forming group such as a carboxyl group, a sulfonate residue, a sulfate residue, a phosphate residue, a nitrate residue, an amino group or an ammonium group. Of these, polymethacryloxyethyltrimethylammonium chloride is particularly preferably used as film former.

The cosmetic material may contain various materials commonly used as cosmetic materials, for example, whitening agents such as vitamin C or placenta extract, anti-inflammatory components such as glycyrrhetinic acid salt, coloring agents such as pigments, surfactants, preservatives and bactericides.

The absolute amount of the cosmetic material cannot be determined because the amount depends on the kind of the multi-layered water permeable carrier, etc. It is required that the amount is generally 5 to 2000 g/m, preferably 10 to 1000 g/m.

As described above, the peel-off mask of the present invention includes a cosmetic material and a multi-layered water permeable carrier. According to the requirements of individual cases, a protective layer which can be peeled off when in use can be laminated on the surface containing the cosmetic substances. The protective layer may be a resin sheet made of polyester, polypropylene, polyethylene, nylon, or the like.

The peel-off mask of the present invention may take various forms. For example, the peel-off mask of the present invention may have a predetermined width that can be cut to a suitable size when applied to the skin. The mask may also be pre-formed to a shape suitable for application to the entire face or a part of the face (e.g., forehead, cheek or nose).

For example, as shown in fig. 6(a), when the release mask has a substantially triangular shape, the release mask 5 shown in fig. 6(b) is adapted to the nose.

When the release mask 5 is substantially T-shaped as shown in fig. 7(a), the release mask 5 shown in fig. 7(b) is applied to the T-shaped area of the face.

In addition, when the release mask 5 is substantially U-shaped as shown in fig. 8(a), the release mask 5 shown in fig. 8(b) is applied to the U-shaped area of the face.

One of the preferred embodiments of the method for producing the release mask of the present invention is as follows: homogenizing and stirring the mixture of the cosmetic materials, and adding water to adjust viscosity to obtain liquid cosmetic material. Under these conditions, the water content is preferably 10 to 95% by weight. Then, the liquid cosmetic material is uniformly coated on the protective layer by brushing, and the multi-layer water-permeable carrier is laminated on the protective layer, thereby impregnating the hydrophilic layers of the multi-layer water-permeable carrier with the cosmetic material. In this case, the liquid cosmetic material has a low viscosity, and the hydrophilic layer is automatically impregnated with the cosmetic material. When the viscosity of the liquid cosmetic material is high, a sufficient time is required for the impregnation. Or coating the cosmetic material on the protective layer, laminating the multiple layers of water-permeable carriers on the surface of the coating layer, and pressing the multiple layers of water-permeable carriers against the protective layer with a press roller.

When the peel-off facial mask is provided with the pasty cosmetic material, the water content in the peel-off facial mask is adjusted, then the facial mask is cut into a suitable shape, and then a water-impermeable packaging bag or a packaging box is used for sealing, so that the water in the peel-off facial mask is prevented from losing before the peel-off facial mask is applied to the skin. On the other hand, when the cosmetic material is dry, the cosmetic material can be cut into a suitable shape after drying. The peel-off mask can be dried at room temperature or at elevated temperature for several hours.

The water content of the peel-off pack containing a cream-like cosmetic material is generally 30 to 80% by weight and the thickness thereof is 50 to 2000 μm, and the water content of the peel-off pack containing a dry-state cosmetic material is generally 0.1 to 30% by weight and the thickness thereof is 10 to 1000. mu.m.

When the peel-off facial mask contains pasty cosmetic substances, the surface of the hydrophilic layer containing the cosmetic substances can be directly applied to the skin, and the cosmetic substances are peeled off from the skin after drying or complete film formation.

When the peel-off type mask pack contains a cosmetic substance in a dry state, water or a cleansing lotion is applied to the surface of the hydrophilic layer containing the cosmetic substance or to the skin in contact with the mask pack. Then, by a method similar to the above, the hydrophilic layer surface containing the cosmetic substance is applied to the skin, and the cosmetic is peeled off from the skin after drying or complete film formation.

Whether the cosmetic material is in the form of cream or dry, it is preferable to wet the skin at the application site with water or a cleansing lotion before applying the peel-off mask to the skin. So that the cosmetic substance contained in the peel-off type mask is soluble in moisture that wets the skin, forming a low viscosity solution. The solution can penetrate into skin tissue and pores. The peel-off mask can be closely attached to the skin and improves the effects of the present invention, particularly, the effect of removing keratotic waste.

The method can minimize the water content of the peel-off mask when the cosmetic material is in a dry state. This effectively shortens the time required for the cosmetic to dry or completely film.

The invention is further illustrated by means of some examples.Example 1(1) Production of peel-off pack

A double-layer nonwoven fabric (weight per unit area: 25 g/square meter, porosity: 92%) formed by hot pressing was used as a multi-layer water-permeable support by combining a hydrophobic web (weight per unit area: 15 g/square meter, thickness: 0.18 mm) composed of polypropylene fibers as a hydrophobic layer and a hydrophilic web (weight per unit area: 10 g/square meter, thickness: 0.12 mm) composed of 40% by weight of polypropylene fibers and 60% by weight of rayon fibers as a hydrophilic layer. The waterproof pressure of one side of the non-woven hydrophilic layer is 2-3 g/square centimeter.

A mixture of 25.0% by weight of polymethacryloxyethyltrimethylammonium chloride, 0.5% by weight of polyvinyl alcohol, 5.0% by weight of glycerol, 10.0% by weight of ethanol and 0.2% by weight of polyoxyethylene hardened castor oil, 0.1% by weight of methyl parahydroxybenzoate, trace amount of essence and 54.7% by weight of pure water was stirred at room temperature with a stirrer. The solution is degassed under reduced pressure to obtain a film-forming cosmetic solution for removing keratotic waste.

The film-forming cosmetic solution was uniformly sprayed and coated onto a protective layer made of polypropylene, the thickness of the coating being about 300 microns (about 300 grams per square meter). The surface of the hydrophilic layer of the multi-layered water-permeable support prepared above was then immediately laminated on the surface of the coating layer of the film-forming cosmetic solution on the protective layer. The laminated sheet was placed in a hot air dryer at 80 ℃ to remove moisture. This method gives a peel-off mask 5 shown in fig. 1 in which only the hydrophilic layer 2 of the multi-layered water-permeable support 1 is impregnated with the film-forming cosmetic substance 4, while the hydrophobic layer 3 constitutes the surface layer. The water content of the film-forming cosmetic material is 17-19 wt%.

(2) Evaluation of Release mask

The resulting peel-off mask was subjected to use tests by an expert panel.

In the use test, the release mask was cut in advance into a nose shape as shown in fig. 6 (a). An appropriate amount of water was applied to a specific skin site, and then the nasal peel-off mask was pressed over the specific skin site as shown in fig. 6 (b). And after drying, peeling the facial mask from the skin. The adhesion, adhesiveness, drying property, peeling property, residue of the peeling layer, keratotic waste removing effect and skin smoothness of the surface of the release mask were evaluated by the expert panel according to the following evaluation criteria.

The evaluation results are shown in Table 1. The results shown in table 1 reflect the average of 10 experts in the blind test. [ evaluation criteria](A) Surface tackiness-: no stickiness was observed at all. O: the stickiness was almost completely imperceptible. O0: slightly sticky. 1. about.1: is obviously sticky. (B) Adhesion ≈ 2: complete adhesion was found. O3: it was found to be almost completely adherent. O4: insufficient adhesion was found. O5: no adhesion was found. (C) Drying property ≈ 6: the cosmetic material dries in a very short time. O7: the cosmetic material dries in a short time. O8: the cosmetic substance dries over a longer period of time. O9: the cosmetic substance dries over a long period of time. (D) Peeling property Δ 0: is easy to be stripped. 1: easy to peel off. And (delta): difficult to peel off. Δ 3: is extremely difficult to peel. (E) Residual property of layer after peeling Δ 4: no peeling residue was observed at all. Δ 5: almost no peeling residue was found. Δ 2: a small amount of residue was found. Delta 7: a large amount of residue was found to be present. (F) Removal of keratotic waste-: is very high. O: high. Δ 6: low. X: is very low. (G) Smoothness excellent: is very smooth. O: and (4) smoothing. And (delta): is slightly smooth. X: no changes were found.Example 2

A release type face mask (water content: 17 to 19% by weight) was produced in the same manner as in example 1, except that a nonwoven fabric (basis weight: 12 g/m) composed of a sheath (polyethylene) core (polyester) type composite fiber treated with a water repellent agent was used as the hydrophobic layer, and a nonwoven fabric (basis weight: 13 g/m) composed of the above composite fiber and treated with a hydrophilic oil agent was combined as the hydrophilic layer, to ultrasonically prepare a double-layer nonwoven fabric (basis weight: 25 g/m, water repellent pressure on the hydrophilic layer side: 0.15 g/cm, porosity: 94%).

The obtained release mask was evaluated in the same manner as in example 1.

The evaluation results are shown in Table 1.Example 3

A release type mask was produced in the same manner as in example 1, and then evaluated. In the use test of example 3, an appropriate amount of water was coated on the surface of the release mask before applying the release mask on the nose, instead of wetting a specific skin site.

And peeling the facial mask from the skin after drying.

The evaluation results are shown in Table 1.Comparative example 1

A release type face mask (water content: 17 to 19% by weight) was produced in the same manner as in example 1, except that a hydrophobic single-layer nonwoven fabric (weight per unit area: 22 g/m, water proof pressure: 4.1 g/cm, porosity: 91%) composed of sheath (polyethylene) core (polyester) type composite fibers by spun bonding was used as a water permeable support.

The obtained release mask was evaluated in the same manner as in example 1.

The evaluation results are shown in Table 1.Comparative example 2

A release type face mask (water content: 17 to 19% by weight) was produced in the same manner as in example 1, except that a hydrophilic single-layer nonwoven fabric (specific gravity per unit area: 22 g/m, water-repellent pressure: 4.1 g/cm, porosity: 93%) prepared by spunbonded sheath (polyethylene) core (polyester) type composite fibers and treated with a hydrophilic finish was used as a water-permeable support.

The obtained release mask was evaluated in the same manner as in example 1.

The evaluation results are shown in Table 1.Comparative example 3

A release type face mask (water content: 17-19% by weight) was produced in the same manner as in example 1, except that a hydrophobic single-layer nonwoven fabric (basis weight: 22 g/m, water repellent pressure: 4.1 g/cm, porosity: 93%) made of 40% by weight of polypropylene fiber and 60% by weight of rayon fiber by a hot press method was used as a water permeable support.

The obtained release mask was evaluated in the same manner as in example 1.

The evaluation results are shown in Table 1.Comparative example 4

A peel-off type face mask (water content: 17-19% by weight) was produced in the same manner as in example 1, except that a hydrophobic single-layer nonwoven fabric (weight per unit area: 22 g/square meter, water proof pressure: 4.1 g/square cm, porosity: 93%) made of a sheath (polyethylene) core (polyester) type composite fiber by spun bonding was used as a water-permeable support, and the water-permeable support laminated on the film-forming cosmetic coating layer was rolled with a press roll to impregnate the nonwoven fabric with the film-forming cosmetic substance.

The obtained release mask was evaluated in the same manner as in example 1. The evaluation results are shown in Table 1.

TABLE 1Evaluation results of example No. 3

Skin smoothness of keratotic waste after peel-off with surface adhesive desiccating Properties peel-off Properties

Residual removal effect

1 ◎ ◎ ◎ ◎ ◎ ◎ ◎

2 ◎ ◎ ◎ ◎ ○ ◎ ◎

3. delta. very good. comparison example

1 ◎ ◎ ◎ × × △ △

2 × ◎ ◎ △ ◎ ◎ ◎

3 × ◎ ◎ △ ◎ ◎ ◎

4 △ ◎ ◎ × × △ △Example 4

A release mask was produced in the same manner as in example 1, except that the film-forming cosmetic material for moisturizing used was a mixture of 8.0% by weight of polyvinyl alcohol, 5.0% by weight of squalane, 5.0% by weight of dipropylene glycol, 5.0% by weight of glycerin, 10.0% by weight of ethanol, 0.2% by weight of polyoxyethylene hardened castor oil, 0.1% by weight of methyl paraben and 66.7% by weight of purified water.

The peel-off mask was subjected to use test evaluation by an expert panel.

In the use test, the release mask was cut into a T shape or a U shape as shown in fig. 7(a) or fig. 8(a) in advance. An appropriate amount of water is applied to a specific skin site, and then a T-shaped or U-shaped peel-off mask as shown in fig. 7(a) or fig. 8(a) is pressed over the specific skin site. And after drying, peeling the facial mask from the skin. The adhesion, adhesiveness, drying property, peeling property, and residue property of the release layer of the surface of the release type mask were evaluated by the panel according to the same evaluation criteria as in example 1, and the skin wettability and smoothness were evaluated according to the following criteria.

The evaluation results are shown in Table 2. The results shown in table 1 reflect the average of 10 experts in the blind test. [ evaluation criteria](H) Skin wettability-: and (4) fully wetting. O: and (4) wetting. And (delta): slightly wet. X: no change in wettability was found. (I) Skin smoothness-: is very smooth. O: and (4) smoothing. And (delta): is slightly smooth. X: no change in smoothness was observed.Example 5

A release type mask was produced in the same manner as in example 1, except that a film-forming cosmetic material was prepared in the same manner as in example 4, and the same two-layer nonwoven fabric as in example 2 was used as the multi-layer water-permeable support.

The obtained release mask was evaluated in the same manner as in example 4.

The evaluation results are shown in Table 2.Example 6

A release type mask was produced in the same manner as in example 4, and then evaluated.

In the use test of example 6, an appropriate amount of water was coated on the surface of the release mask before applying the release mask on a specific skin site, instead of wetting the specific skin site. And peeling the facial mask from the skin after drying.

The evaluation results are shown in Table 2.Example 7

A release mask was produced in the same manner as in example 1, except that a film-forming cosmetic material was prepared in the same manner as in example 4, and a two-layer support (weight per unit area: 45 g/m) was used which was produced by combining a film (weight per unit area: 35 g/m) made of linear low-density polyethylene (L-LDPE), calcium carbonate and additives as a hydrophobic layer with a nonwoven fabric (weight per unit area: 10 g/m) made of 40% by weight of polypropylene fibers and 60% by weight of rayon fibers as a hydrophilic layer, and hot-pressed as a multi-layer water-permeable support. The waterproof pressure of one side of the double-layer carrier hydrophilic layer is not lower than 10 g/square centimeter. The water permeability is 3600-4800 g/m/24 h.

The obtained release mask was evaluated in the same manner as in example 4.

The evaluation results are shown in Table 2.Comparative example 5

A release type mask was produced in the same manner as in example 1, except that the same film-forming cosmetic material as in example 3 was used, and the same single-layer nonwoven fabric as in comparative example 1 was used as a water permeable support.

The obtained release mask was evaluated in the same manner as in example 4.

The evaluation results are shown in Table 2.Comparative example 6

A release type mask was produced in the same manner as in example 1, except that the same film-forming cosmetic material as in example 3 was used, and the same single-layer nonwoven fabric as in comparative example 2 was used as a water permeable support.

The obtained release mask was evaluated in the same manner as in example 4.

The evaluation results are shown in Table 2.Comparative example 7

A release type mask was produced in the same manner as in example 1, except that the same film-forming cosmetic material as in example 3 was used, and the same single-layer nonwoven fabric as in comparative example 3 was used as a water permeable support.

The obtained release mask was evaluated in the same manner as in example 4.

The evaluation results are shown in Table 2.

TABLE 2

Example No. 2	Evaluation results
									Surface tackiness	Adhesion property	Drying Properties	Peeling characteristics	Residual property after peeling	Wettability of skin	Smoothness of skin
4	◎	◎	◎	◎	◎	◎	◎
								5	◎	◎	◎	◎	○	◎	◎
6	○	◎	△	◎	◎	◎	◎
								7	◎	◎	△	◎	◎	◎	◎
Comparative example No. 2
								5	◎	◎	◎	×	×	◎	◎
6	×	◎	⑨	△	○	◎	◎
								7	×	◎	◎	△	◎	◎	◎

The results shown in tables 1 and 2 indicate that: the peel-off facial masks containing the two-layer support having the hydrophobic layer and the hydrophilic layer, obtained in examples 1 to 7, had good effects in the evaluated items, namely, the adhesiveness, drying property, peeling property, residue property of the peel-off layer, and cosmetic effects (keratotic waste removing effect, smoothness of skin, and wettability).

It has been found that the method of moistening a specific skin site with an appropriate amount of water before applying the mask to the specific skin site has low stickiness on the surface of the mask and accelerates the drying process, as compared to the method of moistening a peel-off mask.

In comparative examples 1, 4 and 5, when a single hydrophobic layer was used as a water permeable carrier, instead of a two-layer carrier comprising a hydrophobic layer and a hydrophilic layer, it was found that the peel-off mask was not easily peeled off from the skin and partially remained on the skin. In comparative examples 2, 3, 6 and 7, a hydrophilic monolayer was used, and the surface of the release mask was found to be sticky and not easy to process.

It will be apparent from the description of the invention that various similar modifications can be made to the invention as described. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Industrial applicability

The surface of the stripping type mask is not sticky, the time required by drying or completely forming the film of the cosmetic substance can be shortened, the stripping process is not easy to tear, and the cosmetic substance cannot remain on the surface of the skin.

The application of the peel-off mask of the present invention to the skin can improve the removal of keratotic waste, and shorten the time required for the cosmetic material to dry or completely form a film after the application of the mask to the skin.

Claims (15)

1. A peel-off mask pack comprising a multi-layer water-permeable support including a hydrophobic layer and a hydrophilic layer, and a cosmetic substance.

2. The peel-off mask as set forth in claim 1, wherein the hydrophilic layer is impregnated with a cosmetic material.

3. The sheet pack of claim 1, wherein said hydrophobic layer forms a major surface of the sheet pack.

4. The peel-off mask as set forth in claim 1, wherein the cosmetic substance is a film-forming cosmetic substance.

5. The peel-off mask of claim 4, wherein the film-forming cosmetic substance comprises a moisturizing component, a sebum absorbing component, or a keratolytic waste removing component.

6. The peel-off mask as claimed in claim 5, wherein the keratotic waste removing component is a polymer having a salt-forming group selected from the group consisting of carboxyl group, sulfonate group, sulfate group, phosphate group, nitrate group, amino group and ammonium group.

7. The peel-off mask pack according to claim 5, wherein the keratolytic waste component is polymethacryloxyethyltrimethylammonium chloride.

8. The peel-off mask pack according to claim 1, wherein the hydrophobic layer and the hydrophilic layer each comprise a nonwoven fabric.

9. The release mask of claim 8, wherein the nonwoven fabric on the hydrophilic layer side has a water pressure resistance of not less than 0.1 g/cm.

10. The release mask as claimed in claim 1, wherein the material used in said hydrophilic layer is treated with a surfactant.

11. The peel-off mask pack according to claim 1, wherein the hydrophobic layer comprises hydrophobic synthetic fibers made of polyethylene, polypropylene or polyester.

12. The release mask of claim 1, wherein said hydrophilic layer comprises rayon or cotton.

13. The peel-off mask as set forth in claim 1, wherein said multi-layered water-permeable support is a laminate of a nonwoven fabric and a water-permeable film.

14. The peel-off mask as set forth in claim 1, wherein the hydrophilic layer is impregnated with a cosmetic substance, which forms a film.

15. A method of applying the peel-off mask of claim 1 comprising the steps of: (A) moistening the skin, and (B) applying the peel-off mask on the moistened skin.