Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Web – sheet or filament bases; compositions of bandages; or...
Reexamination Certificate
2000-03-24
2001-11-13
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Web, sheet or filament bases; compositions of bandages; or...
C424S401000, C424S402000, C424S448000, C424S487000, C514S844000
Reexamination Certificate
active
06316021
ABSTRACT:
The present invention relates to a mask for the face or the body.
BACKGROUND OF THE INVENTION
A need exists to have a mask available than can easily be adapted to fit the morphology of the user, in particular in order to obtain more effective treatment.
OBJECTS AND SUMMARY OF THE INVENTION
An object of the invention is to propose a novel mask that is capable of being adapted easily to fit the various outlines and relief of the face or of the portion of the body over which it is applied.
The mask of the invention comprises a backing sheet coated on one of its faces with an adhesive matrix containing a permanent adhesive that adheres both to dry skin and to wet skin, at least one of the backing sheet and the adhesive matrix containing at least one active ingredient serving to exert a specific action on the skin, wherein the adhesive matrix is stretchable at least in the wet state, in order to enable the mask to be adapted to fit the shape of the face or of the portion of the body to be treated, the backing sheet being chosen to be capable, at least in the wet state, of stretching so as to accompany the deformations in the adhesive matrix.
By means of the invention, a mask is obtained that provides treatment that is more effective than the treatment provided by certain known masks that are not stretchable and that adhere to the skin only too weakly to enable them to be positioned properly while they are being applied.
In a particular embodiment, on being used, the mask has an elongation factor in at least one direction that lies in the range 5% to 30%, preferably in the range 10% to 30%, and more preferably in the range 15% to 30%.
Preferably, the adhesive is hydrophobic.
Also preferably, the adhesive matrix forms an occlusive layer.
The backing sheet may be provided with perforations and/or with cutouts serving to make it extensible or to increase its elongation factor.
For example, the perforations may be diamond-shaped.
For example, the cutouts may be in form of slots disposed in staggered manner.
Also in a particular embodiment, the adhesive matrix contains one or more water-absorbant substances, e.g. polyacrylates, natural or synthetic water-absorbant fibers or particles, alginates, and derivatives of corn [maize] or of cellulose.
In a particular embodiment, the adhesive matrix contains one or more active ingredients that are water-soluble and/or liposoluble.
The adhesive matrix may contain collagen.
The adhesive matrix and/or the backing sheet may contain dry extracts of animal or vegetable origin, and/or mineral substances.
Also in a particular embodiment, the backing sheet is made of a material that swells in water.
The backing sheet may be constituted by an elastic woven fabric.
In a variant, the backing sheet may be constituted by a hydrophilic non-woven fabric.
The backing sheet may contain one or more water-absorbant fibers or particles or substances, e.g. polyacrylates and/or a large proportion of viscose or of cotton, e.g. in the range 30% by weight to 90% by weight.
The backing sheet may contain polypropylene or polyester, e.g. in a proportion (by weight) lying in the range 5% to 95%.
In a particular embodiment, the mask contains active ingredients chosen to exert an action chosen from the following list: moistening, smoothing, lightening, toning up, slimming, healing, and anesthetizing.
In a particular embodiment, the adhesive and the backing sheet are chosen such that, once it is wet, the mask has a surface area in the stretched state that is greater by in the range 5% to 70% than the area of the mask in the dry state, and preferably greater by in the range 10% to 70%, and more preferably greater by in the range 20% to 70%.
The adhesive may be chosen from the following list: adhesives based on acrylic, vinyl, poylurethane, silicone, or elastomer (e.g. butyl or latex), and copolymers and/or mixtures thereof.
Advantageously, the adhesive matrix is chosen such that, when it is applied in the runny state on the backing sheet during manufacture of the mask, it has viscosity preventing it from passing through said backing sheet.
The adhesive matrix may contain plasticizers, oils or polyols (e.g. glycerine) in order to make it sufficiently stretchable.
The backing sheet and/or the adhesive matrix may be colored.
In a particular embodiment, the backing sheet is not stretchable so long as it is not impregnated with water, and preferably it is not stretchable when it is in contact with the matrix in the runny state, in solvent phase, during manufacture of the mask.
The invention also provides the use of a mask as defined above for treating the face, the neck, or the thighs, for example, the mask being immersed in water before it is applied, and then being applied to the preferably pre-wetted skin by being stretched so as to be adapted to fit the morphology of the user, or, in a variant, said mask is applied in the dry state on wet skin, and the backing sheet is then sprayed with water.
REFERENCES:
patent: 5026552 (1991-06-01), Gueret et al.
patent: 0 309 309 A1 (1989-03-01), None
patent: 2 538 247 A1 (1984-04-01), None
patent: WO 96/14822 (1996-05-01), None
patent: WO 97/32567 (1997-09-01), None
Database WPI, Section Ch, Week 199412, Derwent Publications Ltd., London, GB; Class A96, AN 1994-097759, XP002125705.
Fubara Blessing
L'Oreal
Oliff & Berridg,e PLC
Page Thurman K.
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