法国专利FR3039368A1 COSMETIC TREATMENT PROCESS

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专利摘要:
The present invention relates to a cosmetic treatment method, comprising the steps of: - applying an adhesive composition (A) to human keratinous materials, in particular the skin, - bringing into contact with said adhesive composition present on said keratinous fibers ( 12) carried by an applicator, - moving the applicator away from the skin, so as to release fibers which adhere to said keratin materials, the fiber holding force on the applicator being less than the adhesion force of the fibers to the adhesive composition present on said keratin materials.
公开号:FR3039368A1
申请号:FR1557360
申请日:2015-07-31
公开日:2017-02-03
发明作者:Jean Baptiste Blanc；Franck Giron；Henri Samain；Chrystele Gevrey
申请人:LOreal SA；
IPC主号:

专利说明:

The present invention relates to cosmetic treatment methods for human keratin materials and more particularly to the skin.
There are different techniques today to mask or correct alopecia: - hair implants requiring surgical procedures, - hairpieces or wigs, - "pepper" systems that strengthen hair still present in sparse areas to make them more visible - the coloration of the skin by the application of a conventional makeup or coloring product, or more invasively and definitively such as tattooing, - the application of free fibers or constituents of a gel-type formula .
Apart from the surgical procedure, invasive, expensive and difficult to catch if it is poorly done, it is difficult to have an alopecia makeup that is undetectable both near and far, that is to say say who faithfully reproduces the implantation and density of human hair.
Wigs and hairpieces have some advantages but cause a fear of movement during the day. In addition, they are reminiscent of a prosthesis, which has a negative and repulsive impact. Finally, they are not suitable for most alopecia, especially when the scalp is partially covered with hair. Finally, wigs and hairpieces are not suitable for short haircuts. Thus this solution does not meet with success.
Another approach is to stick individual fibers by electrostatic flocking. This solution consists in creating an electrostatic potential difference between a set of fibers and the area to be treated, previously coated with an adhesive. The fibers are then conveyed along the field lines and become stuck in the glue. However, such an application faces a number of difficulties, such as the need for equipment for eliminating charges, the confinement of the fibers, the control of the density, the anxiety of the person with respect to the use electricity, the compatibility of electrostatic flocking with a bathroom-type wet environment, the difficulty of self-application and respect for the flocking distance.
We tried to deposit fibers without an electrostatic field, but the aesthetic result is unsatisfactory. In particular, if the fibers are more than a millimeter long, they tend to lie on their side, causing a result not resembling a hair. Even with great skill it is not possible to deposit a minimum number of fibers without creating this problem of fiber coating.
Moreover, it is commonly accepted that the holding of an object stuck on the skin hardly exceeds the two or three days. The need to perfectly correct an alopecia is felt every day; thus it is appropriate that this application of fibers on the skin is compatible with a daily cosmetic routine, that is to say easily achievable at home by self-application.
There is therefore a need, which is not satisfied to date, for a method for masking alopecia in a simple manner and with a result that resembles hair, so as to obtain in particular: a density of fibers close to natural density, - a satisfactory orientation of the fibers, glued by a single end, - a location limited to the only areas to be treated, and - the possibility of treating glabrous areas and sparse areas.
In addition, this process should be easily achievable and on oneself if possible. The invention aims to remedy this need and it achieves this through a cosmetic treatment process, comprising the steps of: - applying an adhesive composition to human keratin materials, especially the skin, - bringing into contact with said adhesive composition present on said keratin materials fibers carried by an applicator, - move the applicator away from the skin, so as to release fibers that adhere to said keratin materials, the holding force of the fibers on the applicator being less than the force of adhesion of the fibers to the adhesive composition present on said keratin materials. The invention is for example intended to treat the capillary zone, the eyebrows or the beard.
By "adhesive" is meant any material capable of withstanding tearing, with or without adhesive strength remanence.
The system according to the invention makes it possible to create fiber organizations with a very satisfactory aesthetic.
It is possible to create several densities, ranging from low density to complement or reproduce sparse hair, to denser hair. It is possible to create sparse beard effects whose appearance can give a particularly aesthetic youthful appearance. It is also possible to reproduce the densities close to the natural densities (inter-hair distance of about 200 μm), the advantage of which is to make the addition of the fibers undetectable from near and far. Densities higher than natural densities can be reproduced to create bushy effects or hide skin irregularities.
The adjustment of the density is done for example by providing the applicator fibers with a greater or lesser density, corresponding to the desired fiber density after transfer.
It is also possible to adjust the density by depositing the adhesive composition on the keratin materials without completely covering them, leaving non-adhesive areas between adhesive areas. The adhesive composition is for example deposited according to a network of points. By choosing the density of the adhesive zones on the keratin materials, it is possible to control the density of the fibers which remain stuck to them after transfer.
One can still play on the two parameters, namely the density of adhesive zones on the keratin materials and that on the applicator.
In the method according to the invention, the fibers may be arranged in various ways on the applicator, depending on the desired result, and in particular the fibers may be arranged in a bundle of parallel fibers on the applicator. The fibers may be disposed on the applicator by being oriented perpendicular to the support surface or at an angle to the normal to that surface, including an angle of up to 45 °. The applicator is preferably close to said keratin materials in a direction perpendicular to them, until the fibers contact the adhesive composition. The applicator is preferably moved away by a reverse movement.
The adhesion strength of the fibers to the adhesive composition is preferably at least double the fiber retaining force on the applicator. This ensures that the fibers are detached from the applicator.
The force to be exerted on the fibers to release them from the applicator may be less than or equal to 15 mN.
The density of the fibers on the applicator may be between 9 and 625 fibers / cm 2. This density is not necessarily homogeneous and can be variable to better reproduce a natural implantation. The gap between two adjacent fibers on the applicator is preferably between 150 and 250 microns.
The fibers may be retained on the applicator by gluing or friction or by a mechanical system comprising one or more moving parts relative to each other, the latter being able to pass from a configuration of retaining the fibers to a configuration of release of the fibers , the force to exert on the latter to release them from the applicator being more important in the retaining configuration than in the release configuration. The mechanical system comprises for example a spring which clamps between its turns, in retaining configuration, the fibers, the spring being tensioned to spread the turns and release the fibers.
The fibers may be retained on the applicator by at least one material whose mechanical strength is degraded by a stimulus, the method comprising the step of subjecting the applicator to said stimulus so as to reduce the force to be exerted on the fibers to releasing them from the applicator, the exposure to the stimulus taking place before and / or during the contact of the fibers with the adhesive composition present on said keratin materials. This solution is particularly advantageous because it allows the user to use the system without precautions while obtaining the desired makeup result. A second advantage lies in the field of production until delivery. The stimulus is for example thermal, said material then preferably comprising a wax, especially beeswax, candelilla or paraffin. In a variant, the stimulus is chemical and comprises exposing the applicator to a solvent of said material, preferably water.
The fibers can be placed on the applicator by an electrostatic flocking process.
The fibers can be completely detached from the applicator during the implementation of the method. Alternatively, the fibers may include a root remaining captive of the applicator and a releasable portion that is released. In this case, the fibers may comprise a predefined zone weakened mechanically or sensitive to a stimulus for weakening it mechanically, in particular a thermal or chemical stimulus, the force to exert to cause the separation of the releasable portion of the root being less than the adhesive force of the releasable portion to the adhesive composition.
The predefined area may be at the same location along the length of the fiber for all fibers; alternatively, this is not the case, which allows after release to have fibers of variable length, which can confer an even more natural rendering.
The fibers can be retained on the applicator by a multiple holding system, including a first retention system releasing the fibers for a force exerted less than the adhesive force of the fibers to the adhesive composition, and a second holding system ensuring when combined with the first fiber retention to a force greater than the adhesive strength of the fibers to the adhesive composition, the second system being modified when using the applicator to apply the fibers to the adhesive composition, so as to cause the force to be exerted to cause the release of the fibers to be less than the adhesion strength of the fibers to the adhesive composition. The modification may include exposing the second sustaining system to a thermal or chemical stimulus. The invention also relates to an assembly for the cosmetic treatment of human keratin materials, in particular for the implementation of the method as defined above, comprising: an adhesive composition to be applied to said keratinous materials; an applicator comprising releasable fibers, the applicator for bringing the fibers in contact with the adhesive composition applied to human keratin materials, especially the skin, to enable them to adhere to said composition, and to release fibers, the force of maintaining the fibers on the applicator being lower than the adhesion strength to the adhesive composition present on said keratin materials. The invention also relates to an applicator for an assembly as defined above, comprising releasable fibers coming off the applicator when a tensile force equal to 15 mN, or even 20 mN, is exerted on it.
The force to be exerted on the fibers to release them from the applicator may be less than or equal to 20 mN, or even 15 mN. The invention will be better understood on reading the following detailed description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which: FIGS. illustrate an exemplary implementation of the method according to the invention, - Figure 2 shows an example of an assembly for the implementation of the method, - Figure 3 illustrates an applicator variant, - Figures 4A and 4B represent an example of a mechanical system for retaining the fibers on the applicator, respectively in configurations for holding the fibers and for releasing them, - FIGS. 5 to 7 illustrate alternative embodiments of the fibers and the attachment of the fibers to the fibers. the applicator, and - Figure 8 shows in section an applicator variant.
The method according to the invention is implemented using an applicator 10 which comprises a gripping portion 11 and fibers 12 which are held on the applicator in a predefined manner.
In FIG. 1A, there is shown schematically such an applicator 10, with a small number of fibers for the sake of clarity of the drawing, knowing that in reality, the number of fibers is much greater.
The gripping portion 11 has been shown very simply, it being understood that it can have very different shapes, depending in particular on the area to be treated and ergonomics sought. The applicator 10 is arranged to allow the fibers 12 to be brought into contact with the region to be treated, in this case a zone of skin S on which an adhesive composition A has been deposited, continuously or not.
The fibers 12 present on the applicator 10 a free end and when the applicator 10 is brought into contact with the skin coated with adhesive composition A, the free ends of the fibers 12 come into contact with the adhesive composition as illustrated in FIG. Figure IB.
The fibers 12 are retained on the applicator so that the force to be exerted to separate a fiber 12 from the gripping portion 11, also called the holding force, is less than the adhesion force of a fiber 12 to the adhesive composition A, that is to say the force that it is necessary to exert on this fiber to separate it from the adhesive composition A.
In FIG. 1C, it is illustrated that fibers have separated from the applicator 10 and remain on the skin S, with a predefined arrangement which is for example mirror of that of the fibers 12 present on the applicator 10 initially.
The amount of fiber 12 deposited by the applicator is, for example, from 3 cm 2 to 625 cm 2.
As illustrated in FIG. 2, the applicator 10 and the adhesive composition A may be proposed to the user within the same packaging 20, for example a box, a blister, a box or a bag, the adhesive composition A being for example contained in a container 21 such as a tube or any other container, for example a bottle, pressurized container, coated support, pump bottle, pot, this list not being limiting.
In a variant, the applicator 10 and the container 21 are provided separately to the consumer, for example to enable him to use one and the same container containing the adhesive composition with several applicators 10. The applicator 10 may, where appropriate, be rechargeable, that is to say having a gripping portion 11 which is used to carry out several treatments and a refill which carries the fibers 12, this refill can be fixed removably on the gripping portion 11 with each new use. This refill is for example in the form of a sheet, a strip or a support arranged to attach to the gripping portion being easily replaceable, having on at least one face the fibers. By way of example, FIG. 8 shows such a refill, comprising a support 35 carrying the fibers 12, arranged to attach to the gripping portion 11, for example by snap-fastening.
The user may be offered a range of applicators comprising fibers of different colors, types and lengths, so as to enable him to choose the fibers which correspond most to his natural color for example.
The same gripping part can be used with several supports carrying respective fibers of different colors.
The length of the fibers 12, after deposition on the keratin materials, is for example between 0.5 and 20 mm.
The applicator 10 can be given various shapes, in particular in order to orient the fibers 12 in a particular way at least at the time of contact with the region to be treated.
It is possible to use fibers of the same type, diameter, length, shape, or color, or fibers of different types, length, diameter, shape or color. The shape of the support may be a plane or a surface adapted to the morphology of the area to be treated.
The fibers 12 are preferably oriented perpendicular to the supporting surface which carries them. Alternatively, as shown in FIG. 3, the fibers 12 make an angle α with the normal to the support surface, which can reach 45 °. The set of fibers 12 may not be in the form of a bundle of parallel fibers, as shown in Figures 1A and 1B, but in the form of a set of fibers.
The fibers can be held in various ways on the applicator, for example using a mechanical system, which can change configuration to release the fibers, or a stimulus-sensitive system, such as a stimulus thermal or chemical, which allows to change the tensile strength of the fibers to the applicator. By way of example of a mechanical holding system, FIG. 4A illustrates a spring 25 which can, when its turns are close together, keep the fibers 12 between them. The spring 25 can undergo a tension, for example via a mechanism actuated by the user, this tension causing the spacing of the turns and loosening of the previously clamped fibers 12 between them. The invention is not limited to a particular system for retaining the fibers on the applicator, and rather than a spring, one can for example use a set of disks or lamellae which, when superimposed and compressed, come to grip the fibers .
The fibers can still be held on the applicator by a material in which the fibers are implanted while the material is in a fluid state.
This is for example an elastomer not yet crosslinked.
The fibers are held in the desired orientation for the duration of the setting of the material.
One way to implant fibers is to use electrostatic flocking.
One way of retaining the fibers on the applicator may be to use a material to which the fibers are bonded, whose mechanical strength, and especially the ability to retain the fibers, may vary in response to the application of a stimulus, for example thermal or chemical example.
In the case of a thermal stimulus, it can for example be used to retain the fibers 12 on the applicator 10 a material having a relatively low melting point, such as a wax, capable of softening or liquefying in case temperature rise beyond ambient temperature. In this case, the applicator may include a heating resistor for locally raising the temperature of the material retaining the fibers on the applicator so as to modify its properties.
For example, the fibers 12 are held on the applicator with the aid of a wax and the applicator comprises a heating system which makes it possible to raise the temperature of the wax to a sufficient value, for example 70 ° C. in order to soften it and thus to ensure that the adhesion strength of the fibers 12 to the adhesive composition on the skin becomes greater than the force that it is necessary to exert on the fibers 12 to separate them from the applicator.
In the case of a chemical stimulus, it is used for example to retain the fibers on the applicator a soluble material in a predefined solvent, for example water, and wets this material before bringing the fibers 12 in contact with the adhesive composition A deposited on the skin S. The water solubilizes at least partially this material and decreases the tensile strength of the fibers thereon. This force becomes lower than the adhesion strength of the fibers 12 on the adhesive composition A deposited on the skin S and this makes it easier to release the fibers after bringing the applicator 10 into contact with the region to be treated.
The material is for example soluble in water and can degrade to release the fibers under the action of wetting, being for example a partially or totally neutralized acrylic copolymer such as the Ultra hold strong of BASF, or a starch-based material.
Where appropriate, as illustrated in FIG. 7, the fibers are retained on the applicator by means of a multilayer structure comprising a first layer 28 and a second layer 29, in contact with which the roots of the fibers extend.
Together, the layers 28 and 29 retain the fibers 12 on the applicator with a retaining force which is greater than that exerted by the adhesive composition A on the fibers, so that in the absence of any other action on these layers 28 and 29, the contact of the fibers 12 with the region to be treated is not sufficient for the fibers 12 to separate from the applicator 10.
However, one of the layers 28 and 29 is sensitive to a stimulus, for example thermal or chemical, which makes it possible to modify its characteristics and to lower its capacity for retention of the fibers to a value such that the retention force of the fibers 12 on the applicator is less than that exerted by the adhesive composition A on the fibers during application.
For example, the first system may be an elastomer insensitive to a solvent and the second an elastomer sensitive to a solvent, especially water. Another example, the first system may be an elastomer and the second a fuse layer, especially at a temperature below 70 ° C.
The fibers 12 can separate completely from the applicator at the time of treatment. Alternatively, the fibers 12 are made with a particular structure that allows them to break, preferably at a predetermined point in their length.
In the example of FIG. 5, the fibers 12 have a weakened zone 30 which extends between a base portion 12a of the fiber, also called root, which is anchored in the applicator 10, and a releasable portion 12b of the fiber, which is released when using the applicator.
Thus, when the free end of the releasable portion 12b is brought into contact with the adhesive composition A, the force exerted by the adhesive composition on the fibers 12, when the applicator 10 is removed from the treated region, is greater than the internal cohesion force of the fiber 12 at the weakened zone 30. The fiber breaks at this weakened zone, leaving the releasable portion 12b of the fiber on the skin.
As a variant, rather than a breakable part, the fibers 12 can be made by joining two parts 12c and 12d together by a connection 31, for example by gluing. The holding of the connection of the two parts 12c and 12d is insufficient to withstand the force exerted by the adhesive composition A on the fiber during use of the applicator, so that the distal portion 12c remains on the skin while that the proximal portion 12d remains on the applicator.
One can have a link 31 whose properties can be modified in response to a thermal or chemical stimulus; for example, the fibers are wetted before application, which reduces the mechanical strength of the connection 31 and allows the distal portions 12c to remain on the skin by separating the proximal portions 12d at the connection zone 31. The link 31 is for example provided by a water-soluble adhesive.
Of course, the invention is not limited to the examples which have just been described. In particular, the applicator can be made with a mixture of fibers of different natures, lengths, shapes or sections, so as to make the appearance of the fibers on the treated region more natural.
The fibers may be held on the applicator by a holding force whose value is decreased at the last moment before use; alternatively, this value is decreased only after contacting the fibers with the adhesive composition.
fibers
By "fiber" it is to be understood according to the invention an object of length L and of diameter D such that L is greater than D, and preferably much greater than D, D being the diameter of the circle in which the section of the fiber. In particular, the L / D ratio (or form factor) is chosen in the range from 3.5 to 2500, preferably from 5 to 500, and more preferably from 5 to 150.
The fibers that may be used in the invention may be fibers of synthetic or natural, mineral or organic origin. They can be short or long, unitary or organized, for example braided, hollow or full. Their shape can be any and in particular of circular or polygonal section (square, hexagonal or octagonal) depending on the specific application envisaged. In particular, their ends can be blunt and / or polished to avoid injury.
In particular, the fibers have a length ranging from 0.5 mm to 20 mm.
Their cross section may range from 20 to 120 μm, 30 to 100 μm, more preferably 40 to 80 μm.
The weight or titer of the fibers is often given in denier or decitex and represents the weight in gram for 9 km of yarn.
The fibers according to the invention have, for example, a title chosen in the range from 0.1 to 100 to denier, preferably from 1 to 70 denier and better still from 5 to 60 denier.
The fibers may be those used in the manufacture of textiles, and in particular silk, cotton, wool, flax fibers, cellulose fibers - especially extracted from wood, vegetables or algae, rayon, polyamide ( Nylon®), viscose, acetate especially rayon acetate, acrylic polymer including polymethyl methacrylate or poly 2-hydroxyethyl methacrylate, polyolefin and especially polyethylene or polypropylene, glass, silica, carbon in particular in graphite form, polytetrafluoroethylene (such as Teflon®), insoluble collagen, polyesters, polyvinyl chloride or vinylidene, polyvinyl alcohol, polyacrylonitrile, chitosan, polyurethane, polyethylene phthalate, fibers formed from a mixture of polymers such as those mentioned above, such as polyamide / polyester fibers.
Preferably, the fibers are polyamide 6-6 fibers.
Moreover, the fibers may or may not be treated on the surface, coated or not with a protective layer or intended to give them a color.
"Kanekalon" flame retardant acrylic fibers may be used.
The fibers are for example those marketed under the reference Minkeprops SKINTEX Flock ref. 590502.
It is possible to use identical fibers or alternatively a mixture of fibers which differ from each other in length, section, material, shape and / or section. The use of fibers of different lengths can confer more naturalness. A mixture of colors too. In particular, it may be advantageous to mix gray and white or black and white fibers.
Adhesive composition
The adhesive composition according to the invention is suitable for application to the skin and for cosmetic use.
The adhesive composition comprises or consists of an adhesive material.
For the purposes of the present invention, the term "material" means a polymer or a polymeric system that may comprise one or more polymers of different natures. This adhesive material may be in the form of a polymer solution or a dispersion of polymer particles in a solvent. This adhesive material may further contain a plasticizer as defined above. This adhesive material must have a certain tackiness defined by its viscoelastic properties.
The adhesive materials according to the invention may be chosen from "Pressure Sensitive Adhesive" type adhesives (for example, pressure sensitive adhesives).
rH as those cited in the "Handbook of Sensitive Pressure Adhesive Technology" 3 edition, D. Satas.
The adhesive materials according to the invention may be chosen from "Pressure Sensitive Adhesive" type adhesives (for example, pressure sensitive adhesives), such as those mentioned in the "Handbook of Pressure Sensitive Adhesive Technology" 3d edition, D. Satas.
The pressure-sensitive adhesive materials may be chosen from acrylic polymers, in particular copolymers of acrylate and methacrylate, pressure sensitive adhesives based on rubber or based on styrene copolymers, for example such as styrene copolymers. isoprene-styrene (SIS) and styrene-butadiene-styrene (SBS).
It may also be polymers of urethane, polyurethanes, silicones, such as Bio-PSA, ethylene-vinyl acetate polymers, block copolymers based on styrene or natural gums, chloroprene, butadiene, isoprene, neoprene or the like. By way of non-limiting examples of pressure-sensitive adhesives based on rubbery polymers, mention may in particular be made of natural rubber (poly (cis-1,4-isoprene)), graft copolymers methyl-methacrylate-isoprene, copolymers of styrene butadiene, butyl rubber, acrylonitrile-butadiene rubber, styrene-isoprene block copolymers, polybutadiene, ethylene-butylene block copolymers and polychloroprene.
Among the pressure-sensitive adhesives comprising polar acrylic polymers, mention may be made of acrylic acid block or random copolymers, alkyl acrylates and alkyl methacrylates, as well as the copolymers of these acrylics with ethylene and acetate. of vinyl.
Other pressure sensitive adhesives that may be mentioned include butyl acrylate, butyl methacrylate and acrylic acid copolymers, these copolymers being commercially available, for example under the trademark RODERM 560 (Rohm and Haas).
An example of a pressure-sensitive adhesive that may be partially suitable is poly (2-ethylhexylacrylate), for example that commercially available under the trademark GEL-TAC 100G (Advanced Polymer International Company), as a 40% aqueous dispersion. solid material of 15 micron adhesive acrylic microspheres.
Examples of suitable acrylic copolymers are commercially available under the trade names EASTAREZ 2010, 2020 and 2050 (Eastman Chemical Co.), ACRONAL V210 (BASF), MOWILITH LDM 7255, REVACRYL 491 (Clariant) and FLEXBOND 165 (Air Products).
Commercial examples of suitable polymeric rubbers are known as RICON 130 polybutadiene (Atofina Sartomer) and ISOLENE 40 polyisoprene (Elementis).
Examples of suitable polyurethane adhesives are available under the trade names SANCURE 2104 (Novéon) and VYLON UR 1400 (Toyobo Vylon).
Examples of suitable vinyl acetate copolymers are commercially available under the trademarks PVP / VA 6-630 (International Specialty Products) and FLEXBOND 149 (Air Products).
Examples of vinyl alcohol / vinyl acetate copolymers are commercially available under the tradenames CELVOL 107 (Celanese) and ELVANOL 50-42 (DuPont).
Mention may also be made of block or random copolymers comprising at least one monomer or a combination of monomers including the resulting polymer at a glass transition temperature below room temperature (25 ° C.), these monomers or combinations of monomers possibly being selected from butadiene, ethylene, propylene, isoprene, isobutylene, silicone, and mixtures thereof. Examples of such materials are styrene-butadiene-styrene, styrene- (ethylene-butylene) -styrene, styrene-isoprene-styrene block polymers such as those sold under the trade names "Kraton" of the Kraton Company or "Vector". "from Dexco Polymers.
The adhesive materials according to the invention may further comprise tackifying resins, such as rosins or rosin derivatives such as hydrogenated rosins, rosin esters, hydrogenated rosin esters, terpenes, aliphatic or aromatic hydrocarbon resins, phenolic resins, styrenic resins and coumarone-indene. Also mentioned are compounds such as shellac, sandaraque gum, dammars, elemi, copals, benzoin, and gum mastic.
Mention may also be made of: silicone resins, which are crosslinked polyorganosiloxane polymers.
The nomenclature of silicone resins is known under the name of "MDTQ", the resin being described as a function of the different monomeric siloxane units that it comprises, each of the letters "MDTQ" characterizing a type of unit.
Among these resins, mention may be made in particular of resins and siloxysilicates which may be trimethylsiloxysilicate of formula [(CH 3) 3 X Si x O] x X (SiO 4/2) y (MQ units) in which x and y are integers ranging from 50 to 80 , the lipodispersible film-forming polymers in the form of non-aqueous dispersions of polymer particles, also called "NAD"
As a non-aqueous dispersion of hydrophobic film-forming polymer, it is possible to use the dispersions of particles of a grafted ethylenic polymer, preferably acrylic, in a liquid oily phase, for example, in the form of particles, surface-stabilized, dispersed in the fatty phase. liquid.
The dispersion of surface-stabilized polymer particles can be manufactured as described in WO 04/055081.
Mention may also be made of dispersions of C 1 -C 4 alkyl (meth) acrylate polymer particles. -C4; stabilized with a stabilizing agent chosen from isobornyl (meth) acrylate polymers, as described in document WO 2015/091513.
UV-reactive glues can still be used.
In examples, Cream-Blend 331 Adhesive Pros-Aide (acrylic latex) adhesive, or AQ1350 Eastman Chemical Adhesive (soluble polyester sulfonic polymer) is used.
Application of the adhesive
The adhesive can be applied in a continuous film, especially when the density of fibers on the applicator is not too high.
Alternatively, the adhesive is applied by providing between the adhesive areas non-adhesive areas, which provides a control on the density and distribution of fibers that remain fixed on the keratin materials.
This makes it possible to reduce the amount of fibers that transfer, and to obtain a more natural result, especially when the density of fibers on the applicator is high.
When the adhesive zones are disjointed, two adjacent adhesive zones can be spaced apart from one another by a distance (measured from edge to edge) ranging from 30 microns to 3 mm, better still from 100 microns to 1 mm.
The size of the spaces between two adjacent adhesive zones, separated by a non-adhesive zone, is for example 30 μm to 3 mm, better 100 μm to 1 mm.
The adhesive zones may be in the form of a network, preferably a network of points, in particular a network of points of 300 microns to 3 mm in diameter. Alternatively, the adhesive areas are in the form of a network of lines, or a network of lines and points, or a grid. The network can be regular or not. A non-regular network, particularly random or pseudo-random, is advantageous in that it allows to confer a more natural appearance. In the case of a network of points, these can be of any shape, for example circular or non-circular. All the points of the network can be of the same shape, or alternatively within the network the shape and / or the size of the points evolves, with for example a variation of size or shape depending on the location within the network.
Preferably, the shape of the dots is circular.
Also preferably, the network is irregular, with a non-constant spacing between two adjacent points.
The adhesive zones may be formed by any suitable means, for example formed by means of an adhesive applicator arranged to deposit the adhesive on the skin at locations remote from each other.
The adhesive zones may be formed using a dispenser having at least one dispensing nozzle provided with a dispensing orifice through which the adhesive is dispensed.
An applicator can be used which transfers the adhesive by buffering.
In a variant, the adhesive is applied using a stencil. The adhesive can be applied by spraying, especially through the stencil above. The adhesive may be applied by adhering one or more adhesive objects to the skin, particularly in the form of pellets. In particular, the pellets may consist of a double-sided adhesive film, coated on both sides with a removable protective film. The double-sided adhesive film is pre-cut into pellets.
The density of adhesive zones ranges, for example, from 4 to 700 per cm 2, better still from 10 to 50 per cm 2, and more preferably from 20 to 30 per cm 2.
Example
An applicator is made comprising a set of fibers held at one end and free at the other end. The end held is characterized in that the fibers withstand tearing up to a force F1. A coating of the area to be treated is carried out by an adhesive composition chosen so that it can produce a holding force of fibers, when brought into contact, sufficient to withstand tearing up to a force F2, such that F2 is greater than 1.5 Fl. Typically the Fl and F2 forces are respectively of the order of 1 and 2g. It is preferred that the force F2 be 2 times greater than F1 in the seconds following the contacting of the fibers with the adhesive composition.
To make the applicator, an elastomer bed is formed with Silflo (NOMADERM ref: GOSILFLO) with a thickness of 0.050 mm on an application support. Prior to caking Silflo, fibers are flocked onto the support using an electrostatic flocking process, embodied by a manual flocking apparatus such as the Microflocker from Campbell Coutts LTD. The fibers are held by friction in the Silflo.
The fibers used to make the system are PA6-6 fibers previously treated to be compatible with the electrostatic flocking process such as Minkeprops fibers (SKINTEX Flock ref.5905 02).
To perform the flocking, the electrostatic field applied between the fibers and the support is for example -35kV.
After a few minutes the Silflo has taken in mass and maintains the organization of the fibers.
A PROS-AIDE Cream Blend 331 Adhesive adhesive film is then applied to the skin.
After a few minutes, the film reaches its maximum of adhesive power. At this precise moment, the free end of the fibers is brought into contact with the adhesive. The application surface of the adhesive is then removed. The fibers brought into contact with the adhesive remain implanted on the latter.

权利要求:
Claims (25)
[1" id="c-fr-0001]
1. Cosmetic treatment process, comprising the steps of: applying an adhesive composition (A) to human keratinous materials, in particular the skin, bringing into contact with said adhesive composition present on said keratin materials, fibers (12) carried by a applicator, to remove the applicator from the skin, so as to release fibers which adhere to said keratin materials, the fiber holding force on the applicator being less than the adhesion strength of the fibers to the adhesive composition present on said keratin materials .
[2" id="c-fr-0002]
2. Method according to claim 1, the fibers (12) being arranged in a bundle of parallel fibers on the applicator.
[3" id="c-fr-0003]
3. The method of claim 1, the fibers (12) being arranged on the applicator with an angle (a) non-zero with the normal to the support surface, including an angle ranging from 0 to 45 °.
[4" id="c-fr-0004]
4. Method according to one of the preceding claims, the applicator being brought close to said keratin materials in a direction perpendicular to them, until the fibers (12) contact the adhesive composition (A).
[5" id="c-fr-0005]
A method as claimed in any one of the preceding claims, wherein the adhesion strength of the fibers (12) to the adhesive composition (A) is at least twice that of the fiber retaining force (12) on the applicator.
[6" id="c-fr-0006]
6. Method according to any one of the preceding claims, the density of the fibers on the applicator being between 9 and 625 fibers / cm 2.
[7" id="c-fr-0007]
7. Method according to any one of claims 1 to 6, the distance between two adjacent fibers on the applicator being between 150 and 250 microns.
[8" id="c-fr-0008]
8. Method according to any one of the preceding claims, the density of fibers being homogeneous on the applicator.
[9" id="c-fr-0009]
9. Method according to any one of claims 1 to 7, the density of fibers being inhomogeneous on the applicator.
[10" id="c-fr-0010]
10. Method according to any one of the preceding claims, the force to be exerted on the fibers to release them from the applicator being less than or equal to 20 mN, or even 15 mN.
[11" id="c-fr-0011]
11. Method according to any one of the preceding claims, the fibers being retained by gluing or friction on the applicator.
[12" id="c-fr-0012]
A method according to any one of claims 1 to 10, the fibers being retained by a mechanical system on the applicator, this mechanical system (25) being able to pass from a configuration of retaining the fibers to a configuration of release of the fibers. , the force to exert on the latter to release them from the applicator being more important in the retaining configuration than in the release configuration.
[13" id="c-fr-0013]
13. The method of claim 12, the mechanical system comprising a spring clamping between its turns in retaining configuration thereof, the spring being tensioned to spread the turns and release the fibers.
[14" id="c-fr-0014]
14. A method according to any one of claims 1 to 10, the fibers being retained on the applicator by a material whose mechanical strength is degraded by a stimulus, the method comprising the step of subjecting the applicator to said stimulus of in order to reduce the force exerted on the fibers to release them from the applicator, the exposure to the stimulus occurring before and / or during the contact of the fibers with the adhesive composition present on said keratin materials.
[15" id="c-fr-0015]
15. The method of claim 14, the stimulus being thermal.
[16" id="c-fr-0016]
16. The method of claim 15, said material comprising a wax.
[17" id="c-fr-0017]
17. The method of claim 14, the stimulus comprising exposure to a solvent of said material, including water.
[18" id="c-fr-0018]
18. A method according to any one of the preceding claims, the fibers being placed on the applicator by an electrostatic flocking process.
[19" id="c-fr-0019]
19. A method according to any one of the preceding claims, the fibers comprising a root remaining trapped in the applicator and a releasable portion.
[20" id="c-fr-0020]
20. The method of claim 19, the fibers comprising a zone (30; 31) weakened mechanically or sensitive to a stimulus to weaken mechanically, including a thermal or chemical stimulus, the force to exert to cause the separation of the party releasable from a fiber of the root being less than the adhesion strength of the releasable portion (12b; 12c) to the adhesive composition (A).
[21" id="c-fr-0021]
21. A method according to any one of the preceding claims, the fibers being retained on the applicator by a multiple holding system, including a first holding system releasing the fibers for a force exerted less than the adhesion strength of the fibers. the adhesive composition, and a second holding system ensuring, in combination with the first, the retention of the fibers to a tensile force greater than the adhesive force of the fibers to the adhesive composition, the second system being modified during use the applicator for applying the fibers to the adhesive composition so as to decrease the force to be exerted to cause the release of the fibers to a value less than the adhesion strength of the fibers to the adhesive composition.
[22" id="c-fr-0022]
22. Method according to any one of the preceding claims, the adhesive composition being applied to the keratin materials in a continuous film.
[23" id="c-fr-0023]
23. A method according to any one of claims 1 to 21, the adhesive composition being applied to the keratin materials in a discontinuous film, including a network of points, regular or not.
[24" id="c-fr-0024]
24. An assembly for the cosmetic treatment of human keratin materials, in particular for carrying out the method as defined in any one of the preceding claims, comprising: an adhesive composition (A) to be applied to said keratin materials, an applicator ( 10) comprising releasable fibers (12), the applicator making it possible to bring the fibers into contact with the adhesive composition applied to human keratin materials, in particular the skin, to allow them to adhere to said composition, and to release fibers, the fiber holding force on the applicator being less than the adhesion strength to the adhesive composition (A) present on said keratin materials (S).
[25" id="c-fr-0025]
25. Applicator for an assembly as defined in claim 24, comprising releasable fibers (12) detaching from the applicator when a tensile force equal to 15 mN or 20 mN is exerted on it.

类似技术:

公开号 | 公开日 | 专利标题

FR3039368A1|2017-02-03|COSMETIC TREATMENT PROCESS

FR2952820A1|2011-05-27|COSMETIC TREATMENT PROCESS

FR2968520A1|2012-06-15|ELEMENT FOR THE APPLICATION OF FIBERS ON HUMAN KERATINIC FIBERS

FR2949679A1|2011-03-11|METHOD FOR MAKING NAILS AND ARTICLE FOR IMPLEMENTING THE METHOD

FR3039369A1|2017-02-03|COSMETIC TREATMENT PROCESS

FR3060951A1|2018-06-29|ELEMENT A GLUE ON THE SKIN

FR3090303A1|2020-06-26|Applicator for applying at least one fiber to human keratin materials

FR3090282A1|2020-06-26|Method for laying fibers on an area of human keratin materials

FR3090302A1|2020-06-26|Cosmetic applicator for placing fibers on human keratin materials

FR2957760A1|2011-09-30|Device for applying fibers on human keratinous fibers i.e. eyelashes of woman, has support fixed on heating end in removable manner, where fibers are arranged in predefined manner and are connected to support by flowable adhesive

US20200128897A1|2020-04-30|Cosmetic treatment method and assembly

US20200138138A1|2020-05-07|Assembly for adding fibers to natural eyelashes and corresponding cosmetic treatment method

EP1865932A1|2007-12-19|Rechargeable dermal patch

FR3099032A1|2021-01-29|Cosmetic item

FR2949678A1|2011-03-11|Make up of nails comprises applying adhesive article comprising pre-thermoformed support having thermoplastic materials and heating the article applied to the nail to soften the materials

FR2962887A1|2012-01-27|Article for making nails or false nails, has layer comprising woven material that is formed of two textile fibers of two different colors, where diameter of textile fibers is identical or different and is lower than specific value

FR2959920A1|2011-11-18|Element for applying fibers to human eyelashes during cosmetic treatment, has flexible support for carrying liquefiable adhesive, where liquefying of adhesive makes part of fibers to be separated from element

同族专利:

公开号 | 公开日

WO2017021240A1|2017-02-09|

CN107846998B|2019-11-01|

EP3328226A1|2018-06-06|

KR20180021892A|2018-03-05|

EP3328226B1|2019-07-10|

ES2741375T3|2020-02-10|

KR102043573B1|2019-11-11|

FR3039368B1|2017-09-08|

CN107846998A|2018-03-27|

JP2018524492A|2018-08-30|

US20180206570A1|2018-07-26|

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法律状态:
2016-06-13| PLFP| Fee payment|Year of fee payment: 2 |

2017-02-03| PLSC| Search report ready|Effective date: 20170203 |

2017-06-13| PLFP| Fee payment|Year of fee payment: 3 |

2018-06-12| PLFP| Fee payment|Year of fee payment: 4 |

2020-06-12| PLFP| Fee payment|Year of fee payment: 6 |

优先权:

申请号 | 申请日 | 专利标题

FR1557360A|FR3039368B1|2015-07-31|2015-07-31|COSMETIC TREATMENT PROCESS|FR1557360A| FR3039368B1|2015-07-31|2015-07-31|COSMETIC TREATMENT PROCESS|

EP16750664.1A| EP3328226B1|2015-07-31|2016-07-26|Cosmetic treatment method|

PCT/EP2016/067843| WO2017021240A1|2015-07-31|2016-07-26|Cosmetic treatment method|

ES16750664T| ES2741375T3|2015-07-31|2016-07-26|Cosmetic treatment method|

KR1020187002955A| KR102043573B1|2015-07-31|2016-07-26|Cosmetic treatment method|

CN201680045173.2A| CN107846998B|2015-07-31|2016-07-26|Cosmetic treatment method|

US15/747,909| US20180206570A1|2015-07-31|2016-07-26|Cosmetic treatment method|

JP2018504854A| JP2018524492A|2015-07-31|2016-07-26|Beauty treatment method|

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