DRY SKIN CARE PRODUCTS USING SOLVENT FILM CASTING TECHNOLOGY
The present invention relates to a composition, notably a cosmetic composition, and a dry film comprising or made from this composition. The invention relates to solvent film casting technology for preparing such dry film, and application thereof, notably as applicator body for cosmetic cares.

The most common format of cosmetic products is still a liquid or cream form, which appears in tubes or bottle. One aim of this invention is to uplift this cosmetic products category and to bring new excitement among consumers there is a need for unconventional format and usage particularly among cosmetic products users. Other conventional products are substrate based products such as tissue wipes and tissue mask. Substrate based product refers to a cosmetic product generally in sheet form in which a substrate such as nonwoven, paper, woven fabric is impregnated with a conventional liquid cosmetic formulation.
Another popular category of cosmetic products in self-supporting sheet form is water soluble polymer based films, which are made using solvent film casting technology (SFCT). Self-supporting sheet form refers to the sheet which doesn't have any external sheet support and composition itself forms a dry sheet. Such self-supporting sheet does not need a substrate to present a defined shape.
SFCT is being used in plastic films industry since end of 19th century and became also popular in pharmaceutical for mouth dissolving oral films for drug delivery. The orally-dissolving film has seen application in personal care prodcuts (Listerine PocketPaks®) and in some over-the-counter medications (TheraFlu ThinStrips®, Sudafed PE Quick Dissolving Strips®, Gas-X Strips®). Dissolving film products have also been developed for delivery routes other than oral, such as vaginal (VCF Vaginal Contraceptive Film®).
In cosmetic industry, this technology remains limited to the cleansing strips due to several limitations of the process.
Such cleansing products in sheet form have been mentioned in the art and are generally marketed as paper soap. US 2,356,168 discloses soap sheet consisting of methyl cellulose and soap. Furthermore US 2006/0127458 describes a cleansing sheet composed of surfactant and mixture of different water soluble polymer, including methylcellulose, in the range of 5 to 30 % by weight before drying of the film. The amount of natural soap in the film is less than 10 % by weight, based on the total weight of the film and the film is preferably free of natural soaps. US 2006/0228319 describes a personal care composition in the form of films containing water soluble polymers such as pulluan, starch, or blends therefore, along with high amount of surfactants.
State of the art clearly shows that combinations of different water soluble polymers along with surfactants have been used for such products. Surfactant used for such products not only work as foaming substance but also work as plasticizer to make film softer and flexible. The use of surfactant also facilitates easy release of the composition from casting liner.
Other than cleansing sheet products, cosmetic packs in the form of a sheet are well known in state of the art. There is sheet type pack made of alginic acid, water soluble polymer and cross-linking agent as described in Japanese patent Laid open No.2-145505. US005939093A relates to sheet type cosmetic composition comprising a water soluble copolymer and a partially cross-linked water soluble polymer. WO 2015/075143 describes a clay based product in sheet form using a water soluble polymer and SFCT.
Still all such cosmetic products in sheet form described in the state of the art targets extractions of impurities, sebum, dirt keratotic plugs, black heads etc. from the skin. Such products are skin cleansing products.
US 2007/0154527 relates to the film products and method of preparation that demonstrate a non-self-aggregating uniform heterogeneity and composed of topical active agents but still does not address application to skin of active ingredients.

The invention aims notably to provide a new cosmetic product.
The invention aims notably to solve the technical problem of providing a composition, in particular a cosmetic composition, for preparing a film or sheet, which when applied on skin delivers one or more active ingredients to skin, thereby providing a cosmetic care or benefit due to the action of the active ingredient on skin.
In one embodiment, the invention aims notably to solve the technical problem of providing a non-cleansing composition.
In one embodiment, the invention aims notably to solve the technical problem of providing an anti-ageing composition.
In one embodiment, the invention aims notably to solve the technical problem of providing a self-supporting product, for example as a film or sheet that doesn’t dissolve in water or partially dissolves and having sufficient body to be applied on skin without need of a supporting substrate.
In one embodiment, the invention aims notably to solve the technical problem of providing such a product together with a good ease of handling.
In one embodiment, the invention aims notably to solve the technical problem of providing such a product in dry form for application on skin as a wet or dry product.
In one embodiment, the invention aims notably to solve the technical problem of providing a process for preparing such products, and in particular aims to provide an industrial process for preparing these products while saving production costs.
In one embodiment, the invention aims to provide a cosmetic care.

Composition
It has been discovered by the present inventors that in order to develop a technical solution to one or more of the above technical problems, it is necessary to replace the surfactant or soap usually used in cleansing products or other plasticizers. “Skin care product” refers here to a cosmetic product which delivers at least one active ingredient to the skin for providing a targeted skin benefit. Here non-limiting examples of skin benefit can be correction of spots, lightening of skin, moisturization of skin, etc.
The invention relates to a composition, notably a cosmetic composition, comprising at least one water soluble polymer, at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients.

Water soluble polymer
Advantageously, a water soluble polymer is selected among water soluble polymers and mixture thereof.
By “water soluble polymer” is meant that an applicator body comprising or made of at least this polymer, upon immersion in water at 25°C disintegrate and/or dissolve slowly e.g. over a period of several minutes to one day without stirring.
“Mixture” refers to a mixture or combination of two or more species.
The dry sheet is produced through a selection of water soluble polymer or combination of polymers that will provide the desired viscosity. A water soluble polymer is preferably selected from the group consisting of starch, pullulan, starch, cellulose, Poly Vinyl Alcohol(PVA), polyvinylpyrrolidone (PVP), derivatives thereof, and blend thereof.
The water soluble polymer is preferably filmogenic. A filmogenic polymer is adapted to form alone or with other filmogenic agents, a continuous film, preferably adhering to skin.
Advantageously, a water soluble polymer used in this invention is selected from the group consisting of cellulose and derivatives thereof. A good water soluble polymer for use in the present invention is selected from cellulose ethers, notably water-soluble methylcellulose and especially hydroxypropyl methylcellulose (HPMC) polymers, for example such as those available for example under trade names METHOCEL K35, METHOCEL A15LV, METHOCEL Premium E5 LV and K35 LV from Dow chemical co.
In on embodiment, said water soluble polymer is PVP or PVA.
The amount of water soluble polymers in the composition depends on the viscosity and/or water solubility of the polymer in aqueous solution.
The composition comprises preferably from 0.5 to 50% water soluble polymer; more preferably 1 to 20%, more preferably 1 to 10%; and even more preferably 1-5% by mass of the total wet composition mass. In one specific embodiment, the composition comprises from 2-5% water soluble polymer by mass of the total wet composition mass. In one specific embodiment, the composition comprises 2% water soluble polymer by mass of the total wet composition mass.
In one specific embodiment, the composition comprises from 10-50%, for example from 20 to 40%, water soluble polymer by mass of the total wet composition mass.

Non-foaming plasticizer
Advantageously, the non-foaming plasticizer according to the invention is compatible with the water soluble polymer to produce a good appearance and desirable physical properties of the finished film.
In one embodiment, said non-foaming plasticizer is selected from the group consisting of polyols and non-ionic surfactants.
In one embodiment, said non-foaming plasticizer is a monomeric or polymeric polyol preferably selected from the group consisting of polyalkylene glycols, polyethylene and polypropylene glycols (PEG or PPG), alkylene glycols, ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, pentylene glycol, glycerol, dextran, sorbitol and any mixture thereof.
In one embodiment, said non-foaming plasticizer is a nonionic surfactant preferably selected from the group consisting of alkoxylated alcohols, or ethers, nonionic surfactants formed by the reaction of an alcohol with one or more alkylene oxide, nonionic surfactants formed by the reaction of a carboxylic acid with one or more alkylene oxide or with one or more polymeric ethers or with one or more monomeric, homopolymeric, or block copolymeric ethers; or with one or more alkoxylated sorbitan or with one or more alkoxylated sorbitan derivatives, and any mixture thereof.
The common examples of such are polyols and non-ionic surfactants. Suitable polyols can be in in monomeric or polymeric form and include polyethylene and polypropylene glycols such as PEG 4-200, which are polyethylene glycols having from 4 to 200 repeating ethylene oxide units; as well alkylene glycols such as propylene glycol, butylene glycol, pentylene glycol, and the like.
Suitable nonionic surfactants include alkoxylated alcohols, or ethers, formed by the reaction of an alcohol with an alkylene oxide, usually ethylene or propylene oxide. Preferably the alcohol is either a fatty alcohol having 6 to 30 carbon atoms.
Examples of such ingredients include Steareth 2-100, which is formed by the reaction of stearyl alcohol and ethylene oxide and the number of ethylene oxide units ranges from 2 to 100. Similar but other non-limiting examples based on reaction of alchol and ethylene oxide are Beheneth 5-30, Ceteareth 2-100, Ceteth 1-45, Laureth 2-100.
Other nonionic surfactants that may be used are formed by the reaction of a carboxylic acid with an alkylene oxide or with polymeric ether or monomeric, homopolymeric, or block copolymeric ethers; or alkoxylated sorbitan and alkoxylated sorbitan derivatives. For example, alkoxylation, in particular ethoxylation of sorbitan provides polyalkoxylated sorbitan derivatives. Esterification of polyalkoxylated sorbitan provides sorbitan esters such as the polysorbates. For example, the polyalkyoxylated sorbitan can be esterified with C6-30, preferably C12-22 fatty acids. Examples of such ingredients include Polysorbates 20-85, sorbitan oleate, sorbitan sesquioleate, sorbitan palmitate, sorbitan sesquiisostearate, sorbitan stearate, and so on.
In one embodiment, said composition does not comprise a foaming plasticizer.
In fact, it has been discovered that foaming plasticizer negatively affect the activity of the active ingredient as it lixiviates the active ingredient from the skin surface.
In one embodiment, the composition of the invention doesn’t comprise more than 5% foaming plasticizer
In one embodiment, the composition of the invention doesn’t comprise any ionic-surfactant.
Surfactants excluded from the composition of the invention are typically amphoteric, anionic, and cationic surfactants.
In one embodiment, the following foaming plasticizers are excluded from the composition of the invention: alkyl sulfates, ethoxylated alkyl sulfates, betaines, taurates, sarcosinates. Specific examples include but are not limited to sodium laureth sulfate (SLES), cocamidopropyl betaine, sodium methyl cocoyl taurate, sodium cocoyl sarcosinate, disodium laureth sulfosuccinate, magnesium laureth sulfate, sodium laureth-8 sulfate and any mixture thereof.
In one embodiment, the non-foaming plasticizer ranges from 0.1% to about 20% by mass; more preferably 0.25% to about 10% and even more preferably from 0.5% to 5% by mass of total wet composition mass. For example, the composition comprises 1% non-foaming plasticizer by mass of total wet composition mass.

Active ingredients
Active ingredients are transferred to the skin surface and interact with skin in particular in order to exert a cosmetic care.
Active ingredients are more particularly active on skin and referred to as cosmetic agents or skin care agents. Cosmetic active ingredient or/and skin care agent is for example selected from the group consisting of whitening agents, anti-oxidants, cleansing agents, free radical scavengers, moisturizers, skin tone altering agents, anti-acne agents, anti-aging agents, anti-wrinkle agents, anti-inflammatory agents, skin texture treatment agents, anti-perspirant agents, aesthetics, anti-bacterial agents, nourishing agents, sebum and moisture absorbers and any combination thereof.
Example of anti-oxidants and or anti-inflammatory and/or cooling actives and/or sweat absorption actives to be used in the invention include, but not limited to, Vitamin C, Vitamin E, derivatives of Vitamin C and Vitamin D, Lycopene, Carrotene, Lecithin, Rice bran lipids, Rice bran oils, menthol, yoghurt, silicated menthols, menthyl lactates; almond oil, peanut oil, sunflower oil; horse gram powder; olive oil, fumated or non-fumated silica, hydrophobically modified silica, hydrophylically silica and any mixture combination thereof.
In one advantageous embodiment, one or more skin exfoliators providing a chemical peeling, such as for example alpha and beta hydroxy acids (AHA and BHA), in particular such as glycolic acid, lactic acid, salicylic acid, malic acid etc. are used as active ingredient. They exfoliate the skin by enhancing the turnover (metabolism) of the epidermis.
In one embodiment, the non-foaming active ingredients range from 0.1% to about 20% by mass; more preferably 0.25% to about 10% and even more preferably from 0.5% to 5% by mass of total wet composition mass. For example, the composition comprises from 1 to 10% active ingredients by mass of total wet composition mass.

In one embodiment, said water soluble polymer is hydroxypropyl methylcellulose (HPMC), and said non-foaming plasticizer is glycerine.
In one embodiment, said water soluble polymer is hydroxypropyl methylcellulose (HPMC), and said non-foaming plasticizer is a polyalkylene glycol, for example a PEG.
In one embodiment, said water soluble polymer is PVP and said active ingredient is at least one skin exfoliators providing a chemical peeling, such as for example alpha and beta hydroxy acids (AHA and BHA), in particular such as glycolic acid, lactic acid, salicylic acid, malic acid etc. or a mixture thereof. The plasticizer to be used can be any of the above described non-foaming plasticizer.
In one embodiment, said water soluble polymer is hydroxypropyl methylcellulose (HPMC), wherein said non-foaming plasticizer is propylene glycol and said active agent is salicylic acid
In one embodiment, said composition comprises from 1 to 50% water soluble polymer; more preferably 1 to 20% and even more preferably 1-5% by mass of the total composition mass, wherein said non foaming plasticizer ranges from 0.1% to about 20% by mass; more preferably 0.25% to about 10% and even more preferably from 2% to 5% by mass of total wet composition mass.
In one embodiment, the present invention combines the synergy of chemical peeling properties of one or more active ingredients, for example of AHAs and/or BHAs, with mechanical peeling action of the film or sheet containing them when applied on the skin. The mechanical peeling action of film or sheet according to the invention is achieved using the water soluble polymer and non-foaming plasticizer.

Dry Film
The invention also relates to a dry film or sheet.
According to one embodiment, said dry film or sheet comprises or consists of a composition according to the invention wherein said composition is in dry form.
The terms film and sheet can be considered as equivalent in the sense of the present invention. According to one specific meaning, a film presents a thinner thickness than a sheet.
In one embodiment, a film has a thickness from 1 to 200µm. In one embodiment, a sheet has a thickness from 200 to 2000µm.
The mechanical and physical properties of dry film depend notably on the properties of the water soluble polymer.
Typically, a composition of the invention presents a viscosity of wet composition at 25°C ranging from 3500 to 100000 mPa.s, more preferably from 3500 to 30000 mPa.s and even more preferably from 4000 to 10000 mPa.s. The viscosity is measured using Proreho rehomat R 180 at 25?C using spindle M3.
The dry film retains its shape and does not disintegrate and/or dissolve during the contact time with skin.
In one embodiment of the invention, the dry film or sheet can be used for developing a cosmetic product in dry film or sheet form with optional fillers in aqueous solution of water soluble polymer.
Non-foaming plasticizers can increase the free volume between the polymer chains which allows the chain segments to move and rotate more freely allowing for increased movement of polymer chains with respect to each other. Non-foaming plasticizers change the flexibility, tensile strength and/or adhesion properties of the resulting film.
The desired color can be obtained by using proper coloring additives in the composition. It can be inorganic or organic dyes and lakes which may or may not be surface treated. Non-limiting examples of such coloring additives include titanium dioxide, yellow iron oxide, red iron oxide, black iron oxide, and caramel, carmine, carbon black, D & C Red 7 Lake, FD & C Yellow 5 Lake, FD &C Yellow dye, FD & C Blue 1 dye.
Lipid compounds can be utilized in film as protection coating. They facilitate shine/gloss to film texture and because of low polarity works as moisture barrier as well.
In one embodiment, the fillers give body to the product film or sheet as well as facilitate easy separation of product film or sheet from the casting liner.
Examples of fillers include pigments, minerals, organic or non-organic particles which are either partially soluble or dispersible in an aqueous medium. The non-limiting examples of such fillers include natural or synthetic mineral clay such as hectorite, bentonite, and quaternized derivatives thereof, which are obtained by reacting the minerals with a quaternary ammonium compound, such as stearalkonium bentonite, hectorites, quaternized hectorites such as Quaternium- 18 hectorite, carbonates such as propylene carbonate, bentones, and the like.
Other Non-limiting examples of such fillers are pigments such as Talc, mica, silica, titanium oxide, zinc oxide and titanium oxide coated mica, borosilicates; hydrophobically modified zinc oxides; hydrophobically modified titanium di-oxides, composites of titanium-zinc.
In one embodiment, the invention relates to a self-supporting dry film or sheet. Such fillers can improve the structure of the dry film or sheet, so it is very easy to separate it from the casting liner. Such self-supporting dry film product can be applied on wet skin for a defined contact time. In this embodiment of the invention, the release liner is not required as fillers contribute to limit the hygroscopicity of the dry film and has sufficient body structure to be used as a single layer. In such an embodiment, the casting liner is not needed during application on skin. The dry film can be directly applied on the wet skin.
The composition according to the invention may be further converted into a dry sheet or film using advantageously the Solvent film casting Technology (SFCT).
The addition of lipids can also increase the brittleness in film, thereby making possible to prepare flakes or powders.
Examples of lipids but not limited are fatty acids, glycerolipids, glycerophospholipids, sphingolipids, saccharolipids, polyketides. The most common lipids to be used in SFCT are aftty acids. Non limiting examples of such fatty acids are stearic acid, Myristic acids, Lauric acid, Capric acid, Palmitoleic acid, Oleic acid, Erucic acid etc.

Applicator body
The invention relates to an applicator body.
In one embodiment, said applicator body comprising or consisting of a dry film or sheet as defined according to the present invention.
In one embodiment, said applicator body presents a shape corresponding to the skin zone on which said applicator body has to be positioned.
In one embodiment, said applicator body comprises a structure presenting at least three layers, wherein a first layer is a casting liner, optionally coated by a silicon layer thereby forming a silicone coated casting liner, a second layer is a dried film as defined according to the present invention, and wherein a third layer is a release liner, optionally coated by a silicon layer thereby forming a silicone coated release liner, wherein said second layer is positioned between said first and third layers.
In one embodiment, said casting liner is made from or comprises a polymer selected from the group consisting of polyvinyl chloride, polyester, polypropylene, polyethylene, and any mixture thereof.
In one embodiment, said composition comprises a lipophilic or amphiphilic substance.
Figure 1 shows a 3 layers structure (4), the product sheet or film (2) is composed of a water soluble polymer, a non-foaming plasticizer and an active ingredient casted on a silicone coated casting liner (1), once the product sheet or film(2) is completely dried release liner (3) is applied on the sheet or film. This three layer structure (4) can be cut in to the desired shape such as shown in Figure 2.
Figure 2 shows different forms of an applicator body according to the invention: a rectangular applicator body (24), an oval-type applicator body (25), an under-eye type applicator body made of two parts, one for each eye (26), and a face mask (27).

SFCT
The present invention also relates to a method for preparing one or more applicator bodies by solvent casting technology, said method comprising :
a) dispersing at least one water soluble polymer, at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients in water, thereby preparing an aqueous formulation comprising at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients, and water,
b) spreading said aqueous formulation onto a roll of casting liner thereby preparing a casting liner supporting said formulation,
c) drying said casting liner supporting said formulation thereby preparing a dried composition film positioned on said casting liner,
d) optionally separating the dry film from the casting liner,
e) shaping said dried composition film optionally supported on said casting liner thereby preparing one or more applicator bodies in the desired shape,
optionally packaging said one or more applicator bodies individually or in multipacks.

The casting process may include preparing a wet composition, metering of this formulation through film applicator, generally comprising a casting knife, uniform application of the composition on casting liner and drying of film. The thickness of the film can be adjusted by clearance of film applicator.
The drying temperature of the film may in general range from 40°C to 200°C; more preferably from 40°C to 100°C and even more preferably from 40°C to 70°C.
Non limiting examples of casting liners to be used for SFCT are PVC, Polyeseter, Polypropylene, Polypropylene, in particular, High density poly ethylene (HDPE), Low density poly ethylene (LDPE). These casting liners can be treated or non-treated. Treated liners here refer to the coated liner to facilitate the easy release of dry film from liner.
The selection of SFCT parameters such as film thickness, drying temperature, selection of casting liner depends on composition and targeted application.
In one embodiment of the invention, SFCT can be used for developing cosmetic products in film or sheet form, specifically for targeting delivery of active ingredients by patches: Under eye patches, anti-acne patches, anti-spot patches, which can be used by consumers as water activated tattoo.
In one embodiment, said applicator body, such as anti-spot and anti-acne patches, may comprise or be composed of HPMC, propylene glycol and salicylic acid.
The inventors have discovered that a further improvement is achieved by appropriate selection of casting liner to separate the product sheet from liners.
In a preferred embodiment, such composition is casted on a silicone coated liner and is covered by a silicone coated release liner of lesser thickness than the casting liner.
Silicone coated casting liners are for example those available under trade names PRIMELINER from Loparex, and more generally silicone coated polyethylene (PE), polypropylene (PP), polyester (PET), and polystyrene (PS) films with either one or two-sided release options. Another example of commercially available silicone coated liner is SARACOAT from Polyplex which includes silicone coated PET and PP film.
In one embodiment, the thickness of the casting liner ranges from 30 microns to 300 microns, more preferably from 50 to 150 microns and even more preferably from 60 microns to 100 microns.
In one preferred embodiment, the thickness of the release liner is lesser than the thickness of the casting liner so that a consumer may easily peel off the release liner before use of the applicator body. In one embodiment, the thickness of the release liner ranges from 5 microns to 100 microns, more preferably from 7 to 40 microns and even more preferably from 10 microns to 20 microns.

Method of cosmetic care
The present invention also relates to a method of cosmetic care comprising placing one or more applicator bodies as defined according to the present invention in contact with one or more skin zones of a human body.
In one embodiment, said method is for cleansing skin and for delivery an additional skin benefit through the delivery to skin of said at least one active ingredient. In one embodiment, the applicator body is for treating or caring oily skin.
In one embodiment, said method comprises peeling off the release liner (7) from the applicator body (8), putting into contact the dry film or sheet (6) of said applicator body with at least one skin zone, peeling off tha casting liner (5) from said applicator body (8), wetting said dry film or sheet (6) by water addition in order to wet the dry film or sheet, obtaining a wet film or sheet, maintaining said wet film or sheet for a contact time sufficient to dry the wet film or sheet on said skin zone to get a dry film or sheet, and peeling off said dry film or sheet from said skin zone.
In particular, the applicator body may be applied on wet surface of skin and absorbs impurities, sebum and excess oil from the skin.
In one embodiment, the applicator body is for mattifying skin.
In one embodiment, the applicator body is for relaxing cosmetic care.
In one embodiment, the applicator body is for refreshing skin care.
In one embodiment, the applicator body is for anti-ageing skin care.
In one embodiment of the invention, the dry sheet or film product using SFCT can be used for developing cosmetic product in sheet or film form, specifically for whole face in the shape of face mask. For whole face application, casting liner would ensure the good fitting of the product on face. To facilitate good fitting on face of such as facial mask, one preferred embodiment relates to application bodies comprising a flexible casting liner such as different grades of PE such as HDPE having flexural rigidity for example around 200000 psi and LDPE having for example flexural rigidity 300000 psi.
In different embodiment of the invention the casting liner used for the application body can be non-silicone coated or with silicone coating.
Figure 3 shows an applicator body (8) having three layers (5,6,7) and representing a face mask, the product sheet (6) comprises a water soluble polymer, a non-foaming plasticizer and a cosmetic active ingredient. The product sheet (6) is casted on a silicone coated casting liner (5). Once the product sheet (6) is completely dried release liner (7) is applied on the product sheet (6). This three layers structure (5,6,7) forming the applicator body (8) can be cut in to the desired shape of face as shown for example in figure 3.
Advantageously, the three layers face mask (8) comprises inner cavities in all three layers (5,6,7). For the mask (8) shown in figure 3, such inner cavities comprises two through openings (9) intended to be placed facing the eyes of the user, and another through opening (10) intended to be placed facing the mouth of the user. The mask (8) also comprises a slit (11) delimiting a flapper intended to be pushed away by the nose of the user, to delimit a nose insertion through opening.
In one embodiment where non silicone coated casting liner is used, after peeling off the release liner (7), the user can apply the applicator body (8) on wet face in a way that product film (6) is towards face, the user can remove the casting liner (5) from face. The remaining product film (6) is left on skin during the desired time and preferably during a contact time sufficient to dry and then is peeled off from skin.
In a variant, the oval shape of the face mask (8) is completed with surfaces facing the neck and/or ear hangings of the user.
In another variant, the applicator body forms a garment having a volume, for example a sock, glove or sleeve.
Typically the applicator body of the invention is a one piece or two pieces face mask, where proposed mask can be cut in two pieces for upper face part and lower face part in order to facilitate easier application on respective face parts.
In general, a user needs to peel-off the release liner first and then apply on the wet surface skin in the way that product sheet or film (2) facing the surface/skin. After application, user can press apply the product so that the product film can adhere to skin/surface, then a user can peel off the casting liner (1) from skin. The product film (2) will remain on skin in wet or semi wet condition, once product film get dry after waiting during a contact time, user can peel off the product film from skin.
In another embodiment, the applicator body is wetted before application on skin.
The contact time is usually of few minutes for example 1 to 7 minutes.
In one embodiment, said method comprises waiting a sufficient period of time, called “contact time”, after placing said film or sheet according to the invention in contact with at least one skin zone until said wet film or sheet has naturally dried, and then removing said dry film or sheet by peeling-off from said skin zone.
After the contact time said dry film or sheet can be easily peeled off from skin.
Advantageously, a dry film or sheet of said applicator body according to the invention can be applied on the wet skin as single layer and, after natural drying on the skin, can be easily peel off as single layer.
Natural drying is obtained by just waiting without using any specific mechanical means or temperature increase. In one embodiment, the film or sheet of the applicator body is typically applied on wet skin for 15-20 minutes or till the drying of the wet film or sheet.
In one embodiment, where non silicone coated casting liner is used, after peeling of the release liner (7), the user can apply the film or sheet (6) on the wet face in a way that film or sheet (6) is facing said skin zone, then the casting liner (5) is removed.
In one embodiment, a non- silicone coated casting liner is used for example when required application time is longer. As the film or sheet (6) is applied on the skin along with casting liner (5), non-occlusive nature of casting liner prevent quick drying of product film.
The composition of said dry film product may contain cosmetically active ingredients. Such skin care agents or cosmetically active ingredients, are for example whitening agents, anti-oxidants, cleansing agents, free radical scavengers, moisturizers, skin tone altering agents, anti-acne agents, anti-aging agents, anti-wrinkle-agents, anti-inflammatory agents, skin texture treatment agents, anti-perspirant agents, aesthetics, anti-bacterial agents, nourishing agents, sebum and or moisture absorbers and any combination thereof. Active ingredients are related to achieve one or more particular skin care benefits.
Advantageously, these actives are released or transferred to skin during the application of the applicator body upon contact with skin.

The most common format of dry film or sheet or application body is folded, packed in a single use sachet. In some cases, dry film or sheet applicator bodies are distributed in the format of a roll pack. Such a roll pack comprises a substrate roll with a plurality of dry films or sheets or applicator bodies of a predetermined shape, for example a plurality of face masks. A cosmetic product can be applied on such an applicator body or dry film or sheet after its detaching from the roll pack or any other packaging.
The invention relates to such packs or packaging.
The invention is illustrated with respect to figures 1, 2, and 3.

Examples:
Some of the examples of compositions of applicator body of the invention are being given in the following examples:
In the examples all percentages/proportions (%) are in mass with respect to the total composition mass, except contrary indication, temperature is room temperature (20°C), except contrary indication, and pressure is atmospheric pressure (101325 Pa), except contrary indication.

Example 1: Composition of under eye patches:
Skin care actives ingredients (Caffeine and Sodium Sodium Hyluranate) were dissolved in an aqueous solution containing a water soluble polymer and a non-foaming plasticizer according to the following proportions:
Ingredient (INCI) Proportion (%)
Water 95.75
Hydroxypropylmethyl cellulose 2
Glycerin 1
Caffeine 0.5
Sodium Hyaluronate 0.05
Potassium Hydroxide 0.7

The proposed composition was casted on silicone coated PET liner of 60 microns thickness and covered with 20 microns release liner. The thickness of wet film was 80 microns while dry film thickness was 50 microns. The drying temperature was 65 ºC.
This dry film can be cut into the shape of under eye patches and can be applied on wet under eyes region of the user after peeling off the release liners. After the application the casting liners were also peeled off, leaving only the wet films on under eye regions of face. The wet films become dry in about 15 minutes and then can be peeled off as single layers or in pieces from under eye regions.

Example 2: Composition of under eye patches:

Composition of example 1 was casted on a HDPE casting liner of 50 microns thickness covered with a 20 microns release liner. In this case after removing the release liner, the dry film was applied on under eye regions along with the casting liner. It was found that the film remains in wet condition up to 5 hours.

Example 3: Composition of Anti-acne patches:

Skin care active ingredients (Salicylic acid and Niacinamide) were dissolved in an aqueous solution containing a water soluble polymer and a non-foaming plasticizer according to the following proportions:

Ingredient (INCI) Proportion (%)
Water 90.5
Hydroxypropylmethyl cellulose 2
Glycerin 1
Salicylic acid 2
Niacinamide 3
Triethanolamine (TEA) 2.5

The proposed composition was casted on a silicone coated PET liner of 60 microns thickness and covered with a 20 microns release liner. The thickness of wet film was 80 microns while dry film thickness was 50 microns. The drying temperature was 65 ºC.
This dry film can be cut into square shape and can be applied on wet acne infected regions of user after peeling off the release liner. After application, the casting liner was also peeled off, leaving only wet film on under eye region of face. The wet film becomes dry in about 15 minutes and then can be peeled off as single layer or in pieces from acne infected regions.

Example 4: Full face mask
Skin care active ingredients (Titanium dioxide and Ascorbyl Gulcoside) were dissolved/dispersed in an aqueous solution containing a water soluble polymer and a non-foaming plasticizer according to the following proportions:

Ingredient (INCI) Proportion (%)
Water 94.3
Hydroxypropylmethyl cellulose 2
Glycerin 1
Ascorbyl Glucoside 2
TEA 0.7

The proposed composition was casted on a HDPE casting liner of 30 microns thickness and covered with a 20 microns release liner. The thickness of wet film was 80 microns while dry film thickness was 50 microns. The drying temperature was 65 ºC.
This dry film can be cut into the shape of a face and can be applied on a wet face after peeling off the release liner. The wet film was applied on face along with HDPE liner for 30 minutes. After removal of this mask, the remaining product on face can be massaged or can be rinsed off.

Example 5: Composition of full face mask with fillers.
Ingredient (INCI) Proportion (%)
Water 93.5
Hydroxypropylmethyl cellulose 2
PEG 200 1.5
Titanium dioxide 1
Talc 2

The proposed composition was casted on a PVC casting liner of 150 microns thickness and was separated from casting liner after drying. The thickness of wet film was 80 microns while dry film thickness was 50 microns. The drying temperature was 75 ºC.
This dry film can be cut into the shape of face and can be applied on wet face for about 15 minutes. After removal of this mask, remaining product on face can be massaged or can be rinsed off.

Example 6: Composition of full face mask with AHAs.

One example of this innovation is skin peeling dry mask wherein the water based formulation is composed of 20 % glycolic acid and 7 % PVA (PolyvinylALCHOL) and 5% PEG (Polyethylene glycol). This formulation was prepared and uniformly casted on a silicone coated PET liner.
This coated liner was cut into the shape of a face mask.
Consumer can for example spray water on face mask before application on skin, applies the face mask with release liner and then remove the release liner immediately and let film mask on face skin for 15-20 minutes and then peel off the face mask from face skin. As soon as face mask comes in to the contact of water, the dry coated formulation is activated and the active ingredient is released from face mask to skin. The glycolic acid exerts its exfoliating action (chemical peeling) while the water soluble polymer (here PVA) exerts a mechanical peeling action during the removal of mask.
Due to combination of chemical and mechanical peeling, the invention enhances the turnover of epidermis, resulting in improved skin smoothing, and in improvement of fine lines and wrinkle of skin, thereby providing an improved anti-ageing effect.

CLAIMS
1. A composition, notably a cosmetic composition, comprising at least one water soluble polymer, at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients.

2. The composition of claim 1, wherein said water soluble polymer is selected from the group consisting of cellulose and derivatives thereof.

3. The composition of claim 1 or 2, wherein said water soluble polymer is selected from the group consisting of cellulose ethers, water-soluble methylcellulose and especially hydroxypropyl methylcellulose (HPMC) polymers.

4. The composition of any one of claims 1 to 3, wherein said non-foaming plasticizer is selected from the group consisting of polyols and non-ionic surfactants.

5. The composition of any one of claims 1 to 4, wherein said non-foaming plasticizer is a monomeric or polymeric polyol preferably selected from the group consisting of polyalkylene glycols, polyethylene and polypropylene glycols (PEG or PPG), alkylene glycols, ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, pentylene glycol, glycerol, dextran, sorbitol and any mixture thereof.

6. The composition of any one of claims 1 to 5, wherein said non-foaming plasticizer is a nonionic surfactant preferably selected from the group consisting of alkoxylated alcohols, or ethers, nonionic surfactants formed by the reaction of an alcohol with one or more alkylene oxide, nonionic surfactants formed by the reaction of a carboxylic acid with one or more alkylene oxide or with one or more polymeric ethers or with one or more monomeric, homopolymeric, or block copolymeric ethers; or with one or more alkoxylated sorbitan or with one or more alkoxylated sorbitan derivatives, and any mixture thereof.

7. The composition of any one of claims 1 to 6, wherein said composition does not comprise a foaming plasticizer.

8. The composition of any one of claims 1 to 7, wherein said water soluble polymer is hydroxypropyl methylcellulose (HPMC), wherein said non-foaming plasticizer is propylene glycol and said active agent is salicylic acid.

9. The composition of any one of claims 1 to 8, wherein said composition comprises from 1 to 50% water soluble polymer; more preferably 1 to 20% and even more preferably 1-5% by mass of the total composition mass, wherein said non foaming plasticizer ranges from 0.1% to about 20% by mass; more preferably 0.25% to about 10% and even more preferably from 2% to 5% by mass of total wet composition mass.

10. A dry film or sheet comprising or consisting of a composition as defined in any one of claims 1 to 9, wherein said composition is in dry form.

11. An applicator body comprising or consisting of a dry film or sheet as defined in claim 10.

12. The applicator body of claim 11, wherein said applicator body presents a shape corresponding to the skin zone on which said applicator body has to be positioned.

13. The applicator body of claim 11 or 12, wherein said applicator body comprises a structure presenting at least three layers, wherein a first layer is a casting liner, optionally coated by a silicon layer thereby forming a silicone coated casting liner, a second layer is a dried film as defined in claim 10, and wherein a third layer is a release liner, optionally coated by a silicon layer thereby forming a silicone coated release liner, wherein said second layer is positioned between said first and third layers.

14. The applicator body of claim 11 or 12, wherein said casting liner is made from or comprises a polymer selected from the group consisting of polyvinyl chloride, polyester, polypropylene, polyethylene, and any mixture thereof.

15. A method for preparing one or more applicator bodies by solvent casting technology, said method comprising :
a) dispersing at least one water soluble polymer, at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients in water, thereby preparing an aqueous formulation comprising at least one non-foaming plasticizer, at least one active ingredient and optionally one or more physiologically acceptable ingredients, and water,
b) spreading said aqueous formulation onto a roll of casting liner thereby preparing a casting liner supporting said formulation,
c) drying said casting liner supporting said formulation thereby preparing a dried composition film positioned on said casting liner,
d) optionally separating the dry film from the casting liner,
e) shaping said dried composition film optionally supported on said casting liner thereby preparing one or more applicator bodies in the desired shape,
f) optionally packaging said one or more applicator bodies individually or in multipacks.

16. A method of cosmetic care comprising placing one or more applicator bodies as defined in any one of claims 11 to 14 in contact with one or more skin zones of a human body.

17. The method of claim 16, wherein said method is for cleansing skin and for delivery an additional skin benefit through the delivery to skin of said at least one active ingredient.

18. The method of claim 17, wherein said method comprises peeling off the release liner (7) from the applicator body (8), putting into contact the dry film or sheet (6) of said applicator body with at least one skin zone, peeling off tha casting liner (5) from said applicator body (8), wetting said dry film or sheet (6) by water addition in order to wet the dry film or sheet, obtaining a wet film or sheet, maintaining said wet film or sheet for a contact time sufficient to dry the wet film or sheet on said skin zone to get a dry film or sheet, and peeling off said dry film or sheet from said skin zone.