EP1099394A1 - Application assembly comprising an applicator for a liquid, pasty or powdery product, comprising bristles incorporating particles - Google Patents

Abstract

The container (2) is equipped with an applicator (4) with a holder (3) forming the container cap and a stem (5) tipped with bristles (9). The bristles, which are preferably 0.06 - 0.20 mm in diameter, and can have a wide variety of grooved cross-sections, from cruciform to polygonal to shapes of letters of the alphabet, are made from a polymer or elastomer matrix containing particles giving random surface projections. The particles can be of mica, calcium carbonate, ZnO, TiO2, MgO. Al2O3, cotton, cellulose, silica, silicates, talc, clay, urea/formaldehyde, wood powder, graphite or metals which are cosmetically compatible, and are preferably in a proportion pof 2.5 - 6 per cent of the total volume of the bristles.

Description

The invention relates to an application assembly containing a product reservoir liquid to pasty or powdery consistency, especially cosmetic or dermatological, to be applied to a surface such as the skin and its integuments. This assembly further comprises an applicator of the type comprising a plurality bristles, for applying the product.

In the assembly targeted by the present invention, the reservoir containing the product has an open end to which is removably attached a plug serving as a gripping element. The cap is integral with an organ application, usually via a rod, so that the organ application, in the closed position of the assembly, can be impregnated with said product.

The reservoir is intended, in particular, to contain a makeup product or a dermatological product, and more particularly a mascara, a lipstick liquid, eyeliner, blush type powder, eye shadow or nail polish, or a hair or dermatological treatment product. A dose of this product is taken using such an applicator, and applied to the surface to be treated.

Many applicators of this type have been proposed in the past, with the aim of to apply mascara to the eyelashes, varnish to the nails, powder makeup on the cheeks or eyelids, or dye on the hair. In the aim of increasing the retention rate of the product on the applicator, it has been proposed, to make one or more longitudinal capillary grooves on the surface of the hairs implanted on the applicator.

Thus, we know from documents FR-A-2 607 372 and FR-A-20627 068, in the name of the applicant, a mascara brush, consisting of bristles having in surface, at least one capillary groove extending in a straight line over all the length of the hairs. The capillary grooves constitute reserves of mascara, allowing the application, a quick and efficient transfer of the mascara on the eyelashes, for a uniform makeup.

In addition, by document FR-A-2 687 055, also on behalf of the Applicant, we know a nail polish applicator having a tuft of substantially parallel hairs. This tuft is made up of two types hairs of different diameter, which hairs may have at least one longitudinal capillary groove.

Generally, the bristles used for making the applicators mentioned above, have a smooth surface, in particular because of their manufacturing by extrusion of a thermoplastic material through a die.

Overall, these prior art applicators give results satisfactory. However, especially when they are loaded with a product determined, it appeared desirable to have an applicator allowing to obtain a makeup that is both very charged and very homogeneous, and this for products of very variable nature (hydrophilic - lipophilic) and. whose autonomy is higher than that of known applicators. Indeed, the mascara applicators the above can have the disadvantage of losing a good part of their product load, especially when the application member is subjected to a wringing operation, prior to the application of the product. In the case of a mascara brush, this effect is all the more noticeable as the free ends hairs are scraped by a wiping lip, while the center of the brush has a heap of product that may dry between two uses.

In the case of the nail varnish brush cited above, a satisfactory loading. However, the Applicant has found that for certain nail polish compositions, there is a bad affinity with material forming the bristles of the brush. In other words, if a hair in one determined material gives good results, for example when the varnish is of the water-varnish type, it can have a low retention power, when the varnish is of the organic solvent type. It is therefore necessary to look for bristles of another material, having a good affinity with this type of varnish organic solvent. Indeed, when this affinity is not appropriate, we obtain too fast a varnish flow and too much application and improper on the nail.

Document De-A-195 34 368 describes a process for the extrusion of fibers forming a thermoplastic matrix in which granules are incorporated. These fibers can be used, in particular, for the manufacture of toothbrushes or other abrasive action devices. This document also mentions the use of fibers for paint brushes, in order to increase the paint retention.

The invention aims to provide a set of application of a product, a applicator associated with this assembly having, in particular after spinning, a large reserve of product. In addition, the invention aims for a homogeneous distribution and a controlled release of the product during application, whatever the nature of the composition, intended to be brought into contact with the support to be treated. Such applicator can be adapted, in particular, to make up the eyelashes or eyebrows, lips, skin or nails, or hair or dermatological treatment.

The object of the invention is to provide universal means for an assembly application to control the loading rate and speed flow of the product during application, whatever the nature of the product. The invention achieves this by modifying the state of the surface of the hairs. constituting the applicator. This improves product retention, and creates a appropriate affinity between the product and the bristles.

Also, the subject of the present invention is an application assembly comprising a reservoir containing a cosmetic product and an applicator, said applicator comprising a gripping element forming an opening / closing means of the reservoir, and integral with an application member which, in the closed position of the assembly is arranged inside the reservoir, said applicator member comprising an arrangement of hairs, at least part of which contains particles forming asperities protruding, randomly, over all or part of the surface of said hairs.

In such an application set, in order to be able to ensure correct dosage of the product and its homogeneous distribution on the applicator member, a wiper member, which is advantageously located in the vicinity of a open end of the tank. Preferably, such a wiping member is made of an elastomeric material, possibly made of foam, and has at least one passage capable of being crossed, at least partially, by the applicator member and, where appropriate, by a portion of a rod connecting the member of application to the gripping element. Said passage of the wringing member may include at least one wringing lip, open or contiguous. When the applicator member is carried by a flat rod, this passage can occur, in the form of at least one slot.

The function of a wiper, in the field of application assemblies for cosmetic products is, on the one hand, to remove the excess product removed by the applicator, and on the other hand, to obtain a distribution of the product, so regular, on the hairs of the applicator member, and this in particular in quantity sufficient to guarantee a long autonomy of the applicator. If applicable, the wiper member can also wring out all or part of the rod of the applicator.

In the case of a mascara brush, in particular of the twisted core type comprising bristles oriented transversely to the axis of the core, a member wringing can have harmful effects. Indeed, we frequently observe than a conventional mascara brush, as it passes through the organ of spin, does not contain enough product, especially on the free portions hairs intended to come into contact with the eyelashes. However, often a large quantity of product is moved over the hairs, after wringing, towards the core of the applicator, hence the transfer of the product to the eyelashes is done in a satisfactory.

The assembly according to the invention, comprising an applicator whose member application includes bristles with roughness as defined above, minimizes these harmful effects occurring during the passage of the application member through the wiping member.

Generally, the hairs of the applicator member are formed from a matrix in which said particles are incorporated, said matrix being advantageously made of a thermoplastic material, chosen from among polyamides, polyesters, polyethylenes, polypropylene, chloride polyvinyl, polyethylene terephthalate; poly tetrafluoroethylene (teflon) or thermoplastic or vulcanized elastomeric materials.

By such an arrangement, a bristle surface having a roughness is obtained, notably noticeable to the touch. So, for example, when a brush mascara is equipped with hairs as defined above, it has a distribution of the product on the surface of the bristles, and this after spinning, homogeneous and thick. In addition, such a brush has a particular attachment power. relative to the eyelashes, making it possible to better curl and “lengthen” said eyelashes, by compared to known mascara brushes.

Likewise, a brush for applying nail polish has an affinity to the product to be applied quite remarkable. Indeed, the varnish deposited on a paintbrush with smooth surface, tends to form "pearls", flowing on the surface of the hairs more or less quickly under the effect of gravity. A brush according to the invention and comprising bristles with roughness on the surface, forms a thicker layer, compared to conventional brushes. Of this way, the varnish is better hooked and flows noticeably less fast. In addition, the load power of the brush according to the invention is significantly higher than the load power of a conventional surface brush smooth. According to the importance of the roughness (height) and their density on the surface, the flow of varnish when it is applied to the nail is easily manageable. This is valid for both a water-based varnish and a varnish based on an organic solvent such as ethyl acetate, ketone or acetate butyl.

Advantageously, the particles which can be used for making the bristles are chosen from particles of mineral, vegetable or synthetic origin. Of preferably, these particles are chosen from globular, lamellar particles or fibrous.

Tests carried out by the applicant have shown that it is possible to obtain good results, choosing a ratio between 1.05 and 1.4, between the average diameter of a circle in which the hair section at the top is inscribed roughness, and the average diameter of a circle in which the section of the hairs at the base of the asperities.

By way of nonlimiting examples, mention may be made of particles of mica, Ca carbonate, ZnO, TiO ₂ , MgO, Al ₂ O ₃ , cotton, cellulose, silica, silicates, talc, clays, urea / formaldehyde; wood powder, graphite, carbon black, iron oxides or cosmetically compatible metals, and mixtures thereof.

Advantageously, said particles are present in the hair matrix in a proportion of 0.2% to 20% by volume, and preferably in a proportion of 2% to 10%, and more particularly in a proportion of 2.5% at 6%, relative to the total volume of said hairs.

These particles are chosen, so that their average size is between 2 µm and 500 µm, and preferably between 5 µm and 200 µm, and more particularly between 10 µm and 150 µm. We can use particles of a different nature, and the average size of which may be different, too.

According to one embodiment, the application member comprises at least one tuft made up of said hairs, the hairs being oriented substantially parallel, one end of the tuft being fixed on the gripping element by through a rod. Such an applicator is particularly suitable for applying a nail product. Such an enforcement body may also be conformed with a blush brush, allowing the application of a powder on the face, using a brush to apply an eye shadow or eyeliner brush to make up the eyebrows.

According to a particular provision of the invention, said applicator member can be secured to a free end of a support. In this case, the organ application is arranged in a plane of said support and oriented transversely to a longitudinal axis of the support. Such a provision may be adopted, advantageously, for a mascara applicator on the eyelashes.

According to another embodiment, said bristles are oriented, so substantially radial on the applicator member, with respect to a central core or off-center. In this case, the applicator can be used as a brush. mascara or as a hair dye applicator.

Advantageously, such a core is formed by twisting two branches of a wire metallic, so as to clamp the hairs between the twisted branches of the core. In this case, a “brush” type brush is obtained.

The applicator can have variable external shapes, Thus, the profile outside of the applicator, defined by the ends of the bristles, can be adjusted to needs, depending on the nature of the product to be applied and the morphology of the surface to be treat. This profile can be obtained for example by mowing, using a mower, free ends of the hairs. The applicator may also include a mixture of hairs of different lengths.

In addition, the bristles of the applicator, according to the invention, can be: at the ends tapered or rounded, in the shape of a fork or pin head, or to have undergone all kinds of processing known to those skilled in the art. These hairs can be wavy in a plane or shaped in a stretched spiral.

As far as the cross section of the bristles is concerned, this may advantageously form part of a circle with a diameter of between about 6/100 ^th of a mm and about 30/100 ^th of a mm, and preferably between about 6 / 100 ^th of a mm and about 20/100 ^th of a mm, this circle passing through the peaks of the asperities.

Depending on the nature of the applicator as well as that of the product to be apply, the length of the bristles can be between approximately 2 mm and approximately 25 mm. In the case of a brush of the “bottle brush” type, the length of a bristle is defined by the distance between its two free ends. In this case, the length hairs is, for example, of the order of 7 mm to 12 mm.

The shape of the cross section of the bristles can be chosen from the sections cruciform; trilobe; tetralobe; full oval; hollow oval; full cylindrical; hollow cylindrical; solid rectangular; hollow rectangular; polygonal solid, such as triangular; hollow polygonal; in the form of "8", "C", "E", "F", "H", "I", "L", "N", "S", "T", "V", from "W; star-shaped or crescent-shaped.

a) - préparer un mélange d'un matériau thermoplastique et d'au moins une charge particulaire dans une proportion appropriée ;

b) - charger ledit mélange dans une machine à extruder ;

c) - extruder à une température appropriée ledit mélange au travers d'une filière ;

d) - refroidir la fibre sortant de la filière, notamment dans un bain de liquide à une température inférieure à la température d'extrusion ;

e) - réchauffer la fibre, notamment dans un four, à une température voisine à la température de transition vitreuse dudit matériau thermoplastique, de manière à faire apparaítre lesdites aspérités (B) sur la surface de ladite fibre ;

f) - refroidir la fibre ;

g) - couper la fibre, à la longueur souhaitée du poil.

In particular, the bristles which can be used for producing the applicators which have just been described can be obtained by a process comprising the following steps:

a) - preparing a mixture of a thermoplastic material and at least one particulate filler in an appropriate proportion;

b) - loading said mixture into an extruding machine;

c) - extruding said mixture at an appropriate temperature through a die;

d) - cooling the fiber leaving the die, in particular in a liquid bath at a temperature below the extrusion temperature;

e) - reheating the fiber, in particular in an oven, to a temperature close to the glass transition temperature of said thermoplastic material, so as to cause said roughness (B) to appear on the surface of said fiber;

f) - cooling the fiber;

g) - cut the fiber to the desired length of the hair.

If necessary, a stretching of said fiber is carried out between step e) and step f), said stretching having the effect of reducing the diameter of said fiber by compared to its initial diameter and thus make better appear said roughness. Advantageously, the stretching of the fibers is carried out so that, after stretching, the fiber has a diameter between 60% and 95%, relative to the diameter initial fiber before stretching.

The invention consists, apart from the arrangements set out above, of a certain number of other provisions which will be more explicitly discussed below, except with regard to exemplary embodiments described with reference to the attached drawings, but which are in no way limiting.

- la figure 1 représente une vue en coupe axiale d'un ensemble d'application de mascara, selon un premier mode de réalisation de l'invention ;

- la figure 2 représente une vue en coupe axiale d'un ensemble d'application de vernis à ongles, selon un second mode de réalisation de l'invention ;

- la figure 3 représente une vue en coupe axiale, d'un ensemble d'application de mascara, selon un troisième mode de réalisation de l'invention ;

- les figures 4 et 5 illustrent, de manière schématique, un mode de réalisation de poils comportant des aspérités en surface ;

- les figures 6 à 16 illustrent, une vue en perspective, de différents types de poils, utilisables pour la réalisation des applicateurs montrés aux figures 1 à 3 ;

- les figures 17 et 18 illustrent, des poils ayant subi un traitement spécifique de leur extrémité libre.

In these drawings:

- Figure 1 shows an axial sectional view of a set of mascara application, according to a first embodiment of the invention;

- Figure 2 shows an axial sectional view of a set of nail polish application, according to a second embodiment of the invention;

- Figure 3 shows an axial sectional view of a set of mascara application, according to a third embodiment of the invention;

- Figures 4 and 5 illustrate, schematically, an embodiment of bristles having roughness on the surface;

- Figures 6 to 16 illustrate, a perspective view, of different types of bristles, usable for the production of the applicators shown in Figures 1 to 3;

- Figures 17 and 18 illustrate, hairs having undergone a specific treatment of their free end.

Referring to Figure 1, we see a set of mascara application 1, axis longitudinal X, for the application of a product M, contained in a tank cylindrical 2, and equipped with an applicator 3. The applicator 3 is integral with a cap 3a, suitable for being fixed, by screwing, to the neck 21 of the tank and serving gripping element. The neck 21 has an external thread 22, suitable for cooperate with a complementary thread 3b produced on a lower portion of the internal surface of the plug 3a. The plug 3a has a general shape cylindrical elongated, allowing an easy grip. The plug 3a is provided with a central rod 5 emerging from the lower side of the plug 3a. This rod 5 has a lower end 5a to which is fixed, for example by bonding or fitting, an application member 4.

The neck 21 of the bottle has a free circular edge 23, defining an opening 10. In this opening is mounted a wiping member 8, formed of a material elastically deformable. The wiper member is in the form of a thermowell with the bottom facing the tank 2. The bottom is open, so as to form a circular wiping lip, suitable, during the extraction of applicator 6 out of the reservoir, first wring the rod, then remove all excess product, on the applicator member. In the storage position, the organ rod 5 is crossed by rod 5.

The applicator member 4 shown in FIG. 1 is a brush for applying mascara on the eyelashes. Such a brush comprises an elongated core 4a, formed by twisting of two branches of a metal wire previously folded into a U. The core 4a is fixed by force fitting, at the end 5a of the rod 5. Bristles 9 are located radially between the wires forming the core 4a. When the branches wire are twisted, the bristles 9 are clamped and held between the turns of the core 4a. Magnifying glass A shows an enlarged view of a hair with roughness B.

These asperities are obtained by incorporating particles P into the material constituting the bristles 9, so as to form micro-bosses B distributed from randomly on the surface of the hairs. So, at the touch, such hair 9 exhibits significant roughness. After extracting the applicator from the tank, a high rate of product remains attached between the micro-bosses B, even after spinning.

The bristles 9 consist, advantageously of a matrix Q, in particular thermoplastic with an appropriate level of P particles. usable for the applicators according to the invention, are illustrated, so nonlimiting, in FIGS. 1 (magnifying glass A) and 6 to 18. Thus, the brush 4 can have a mixture of hairs with roughness B of different types (different diameters, shapes, sections, elasticities, flexibilities, materials).

Such a brush can have any known external shape, obtained by example by cutting the free ends of the bristles 9, using a clipper.

The brush according to the invention, according to the embodiment considered, is suitable to charge heavily with mascara. On contact, the eyelashes charge themselves heavily in mascara. When the user moves brush 1 on the eyelashes, the latter continue to be in contact with the brush throughout their length and are coated while bending.

The bristles of the brush paint the eyelashes. When the user moves the brush by compared to the eyelashes, these are taken care of by the hairs by means of the asperities B, of random arrangement. The product is distributed according to the degree eyelash interpenetration in the brush, all around and all the way length of each eyelash. The eyelashes are further combed and elongated. In addition, thanks roughness, the roughness B causes increased lash attachment on the surface of the bristles 9, so as to obtain better curling of said eyelashes.

Thus, each eyelash is evenly coated. There is no noticeable difference of make-up between the eyelashes at the end of the eyelid and those in the middle. The eyelashes are perfectly separated from each other, elongated and strongly curved.

In Figure 2, we can see, according to a second embodiment, a set of application of the liquid nail product type, generally designated by the reference 101. This assembly comprises a reservoir 102, having an axis longitudinal X of symmetry, and an applicator 106 provided with a sleeve 103. The tank 102, advantageously made of glass, contains a liquid product V or viscous to apply, for example a composition of nail varnish.

The reservoir 102 comprises a neck 121 defining an opening 110. The neck 121 has an external thread 122, capable of cooperating with a thread complementary inside the sleeve 103.

The sleeve 103 also includes an applicator member 104 which, in the in this case, is in the form of a brush consisting of a tuft of bristles 109 fixed at the free end 105a of a rod 105. The other end of the rod is integral with the sleeve 103. In the tuft, the hairs are arranged substantially parallel, to each other.

When the application assembly is closed by screwing the sleeve 103 onto the tank 102, the tuft 104 of hairs 109 soaks in the product V. These hairs 109 are as defined above, and more particularly chosen from the bristles shown in magnifying glass A in FIG. 2 and in FIGS. 6 to 18.

When the user wishes to apply product V, he unscrews the sleeve 3 serving as a gripping element, and extracts the brush from the reservoir. The brush often contains an excess of product. To wring out the brush, the user wipes it against the free edge of the bottle neck 121.

It should be noted that, during this operation, the brush remains well charged and presents good varnish retention power, even after several passes spin. The deposition of varnish on the nail is carried out with a speed both reduced and substantially constant flow. The layer of varnish obtained is more regular, and the varnish dries quickly.

In Figure 3 we see a 206 mascara applicator, which differs from that shown in Figure 1 by the fact that its rod 205 is substantially flat. he has at its free end 205a a width close to that of an assembly 204 of hairs 209, arranged in the plane of the rod 205, in a substantially perpendicular to an axis of the applicator 206. The hairs 209 used have roughness, and are of the same type as those described with reference to Figures 1 and 2. The other end of the rod 205 is fixed in a grip sleeve 203.

The mascara applicator 206 is part of a makeup set 201, comprising a reservoir 202a for a product M, surmounted by a wiper element 222. The wiper element has an open neck 210 which can be closed off by the gripping sleeve 203. The wiper element further comprises a shoulder 223, on which is mounted a wiper member 208. In the case present, the wiper member is formed by an elastomeric membrane or foam, having a slot 211, capable of being traversed by at least one portion of the rod 205 and by the assembly 204 of the bristles 209. The layout plan of the bristles 209 can also be inclined relative to the plane passing through the rod 205.

When the applicator 206 is extracted from the reservoir, the brush responsible for mascara passes through the wringer 211. This wrings out the external face of the hairs. The shrinking between the roughness B of the hairs constituting micro-reserves significant amounts of product, remain loaded with product M.

When the applicators targeted by the invention are subjected to an operation spin, before applying the product, spin is carried out random. Indeed, the asperities B are arranged so that micro-reserves of product are present on the entire surface of each pile. These micro-reserves are able to transfer the product very evenly on the support to be treated.

One embodiment of the bristles which can be used in accordance with the present invention is shown schematically in Figures 4 and 5.

In an extruder machine 50 provided with a screw loader 52, a mixture of a thermoplastic material Q and an appropriate amount of particles P. The thermoplastic material is for example a polyamide, and the particles are globular particles of titanium dioxide. The mixture is brought to a temperature allowing the extrusion of the thermoplastic material. Under the thrust of the charger 52, the mixture (P, Q) is extruded through a die 54. The filament F thus obtained has an essentially smooth surface. After cooling, for example in a cold water bath (not shown), the material Q of the fiber F, forming a matrix, retracts, making the roughness B. To further accentuate the appearance of roughness B, after heating the fiber F to a temperature close to the transition temperature glassy, the fiber can be stretched longitudinally, as symbolized by arrows E, E 'in Figure 5. After cooling and after cutting with desired length, bristles 9 are then obtained, suitable for being implanted in a applicator, as described above.

After said stretching of the fiber F, it has a corresponding diameter approximately 60% to 95% of the fiber diameter before stretching.

Figure 6 shows a cross section along line VI-VI of Figure 5. We sees the matrix Q of the pile 9 made of thermoplastic material, on the surface of which the asperities B emerge, formed by the particles P incorporated in the matrix Q. According to the representation of figure 6, the size of the particles P is relatively large.

According to a variant, shown in FIG. 7, particles P of size are used. significantly smaller than the particle size in Figure 6. In consequently, the asperities B emerge from the matrix Q to a lesser degree.

In Figures 6 and 7, the relationship between the average diameter (D) of a circle in which registers the section of the hairs at the top of the asperities (B) and the diameter means (d) of a circle in which the section of the hairs at the base of the roughness, may advantageously be between 1.05 and 1.4.

Depending on the cross section of the hair, the average particle size and of the stretching rate carried out, said particles (P) may be present in the hair, in a proportion of 0.2% to 20% by volume, and preferably in a proportion of 2% to 10%, and more particularly in a proportion from 2.5% to 6%, relative to the total volume of said hairs.

Advantageously, said particles (P) are chosen from particles of which the average size is between 2 μm and 500 μm, and preferably between 5 µm and 200 µm, and more particularly between 10 µm and 150 µm.

Figures 8 to 18 illustrate particularly preferred bristle configurations for the realization of the applicators 6, 106, 206 described above. In these figures, the reference P denotes the particles incorporated into the structure of the hair, the reference B designates the asperities formed, reference C designates an edge longitudinal or helical and the reference G designates a longitudinal groove or helical formed in the surface of the bristles shown.

Figure 8 shows a cross-sectional view of a bristle whose section S ₈ has the shape of a "T", having two grooves G.

Figure 9 shows a cross-sectional view of a bristle whose section S ₉ has the shape of an "I", having two grooves G.

Figure 10 shows a cross-sectional view of a hair whose section S ₁₀ has the shape of an isosceles triangle, having three edges C.

Figure 11 shows a cross-sectional view of a bristle whose section S ₁₁ has the shape of a "C", having a groove G.

Figure 12 shows a cross-sectional view of a hollow hair whose section S ₁₂ has an oval shape.

Figure 13 shows a cross-sectional view of a bristle whose section S ₁₃ has the shape of an "L", having a groove G and an edge C.

Figure 14 shows a cross-sectional view of a bristle whose section S ₁₄ has a rectangular shape.

Figure 15 shows a cross-sectional view of a hollow bristle whose section S ₁₅ has a substantially triangular shape, and whose edges are formed by bulges R.

Figure 16 shows a cross-sectional view of a hollow bristle whose section S ₁₆ has a substantially rectangular shape, and whose edges are formed by bulges R.

Advantageously, the cross section of the above bristles is part of a circle whose average diameter is between 6/100 ^th of mm and 30/100 ^th of mm, measured at the top of the asperities B.

The matrix Q of the bristles 9 can be made of polyamide (PA6, PA6 / 6, PA11, PA6 / 10, PA6 / 12), polyester, polyethylene, polypropylene, copolymer ethylene / propylene, polyvinyl chloride, poly tetrafluoroethylene (teflon), polyethylene terephthalate or thermoplastic elastomer, such as polyether blockamides or silicone rubbers.

It is understood that these bristles with roughness B may comprise, cruciform sections; trilobe; tetralobe; full oval; hollow oval (S ₁₂ ); full cylindrical; hollow cylindrical; solid rectangular (S ₁₄ ) hollow rectangular; solid polygonal, such as triangular (S ₁₀ ); hollow polygonal; in the form of “8”, “C” (S ₁₁ ), “E”, “F”, “H”, “I” (S _g ), “L” (S ₁₃ ), "N", "S", "T" (S ₈ ), "V", "W; star-shaped or crescent-shaped.

It is understood, of course, that the bristles 9 can be mixed with bristles of all kinds, smooth surface. So, in the same applicator, we can arrange hairs with roughness B with hairs without roughness, with hairs of section different, and / or with bristles made from different materials.

Figures 17 and 18 illustrate bristles 9 usable according to the invention. The end free of these hairs underwent treatment. Thus, Figure 17 shows a sectional view longitudinal of the free end of a hair 9 in the shape of a pin head 9 ′, obtained by heat treatment of said end. Figure 18 shows a view in longitudinal section of the free end of a pile 9 of shredded shape 9 ", such that it can be obtained by grinding or any other abrasive operation of said free end.

In the above detailed description, reference has been made to several modes preferred embodiments of the invention. It is obvious that variants may exist there. be made without departing from the spirit of the invention as claimed below.

Claims (24)

Application assembly (1, 101, 201) comprising a reservoir (2, 102, 202) containing a cosmetic product (M, V) and an applicator (6, 106, 206), said applicator comprising:
a gripping element (3, 103, 203) forming a means for opening / closing the reservoir, and integral with an application member (4, 104, 204) which, in the closed position of the assembly, is disposed inside the reservoir, said applicator member comprising an arrangement of bristles (9, 109, 209) at least part of which contains particles (P) forming asperities (B) projecting, randomly, over any or part of the surface of said bristles. Application assembly (1, 201) according to claim 1, characterized in that said reservoir has an opening (10, 210), a wiping member (8, 208) being disposed in the vicinity of the opening (10, 210), capable of being traversed by said applicator (6, 206) so as to dose the quantity of product (M) withdrawn from using said applicator and / or wringing a rod (5, 205) connecting the member application (4, 204) to the gripping element (3, 203). Application assembly (1) according to claim 2, characterized in that the wiper member (8, 208), is made of an elastomeric material, optionally made of foam, and has at least one passage (11, 211) suitable for be crossed by said applicator member (4, 204). Application assembly (1) according to claim 2 or 3, characterized in that the wiper member (208) is made of an elastomeric material and has at least one slot (211). Assembly according to any one of the preceding claims, characterized in that the particles (P) are chosen from the original particles mineral, vegetable or synthetic. Assembly according to any one of the preceding claims, characterized in that the section of the bristles is inscribed in a circle (D) of average diameter between approximately 6/100 ^th of mm and approximately 30/100 ^th of mm, and preferably between about 6/100 ^th of a mm and about 20/100 ^th of a mm Assembly according to any one of the preceding claims, characterized in that the ratio between the mean diameter (D) of a circle in which registers the section of the hairs at the top of the asperities (B) and the diameter means (d) of a circle in which the section of the hairs at the base of the roughness is between 1.05 and 1.4. Assembly according to any one of Claims 1 to 7, characterized in that that said particles (P) are chosen from globular particles, lamellar or fibrous. Assembly according to any one of Claims 1 to 8, characterized in that the said particles (P) are chosen from the particles of mica, Ca carbonate, ZnO, TiO ₂ , MgO, Al ₂ O ₃ , cotton, cellulose, silica, silicates, talc, clays, urea / formaldehyde; powder of wood, graphite, carbon or cosmetically compatible metals, etc. Assembly according to any one of the preceding claims, characterized in that said particles (P) are present in the hairs in a proportion ranging from 0.2% to 20% by volume, and preferably in a proportion ranging from 2% to 10%, and more particularly in a proportion ranging from 2.5% to 6%, relative to the total volume of said hairs. Assembly according to any one of the preceding claims, characterized in that said particles (P) are chosen from particles whose average size is between 2 µm and 500 µm, and preferably between 5 µm and 200 µm, and more particularly between 10 µm and 150 µm. Assembly according to any one of the preceding claims, characterized in that said particles (P) comprise a mixture of particles of medium size and / or of different nature. Assembly according to the preceding claim, characterized in that the said hairs are formed from a matrix (Q) in which are incorporated said particles (P), said matrix being made of polyamide, polyester, polyethylene, polypropylene, polyvinyl chloride, poly tetrafluoroethylene (teflon), polyethylene terephthalate, or elastomer thermoplastic or vulcanized. Assembly according to any one of the preceding claims, characterized in that all or part of the bristles (9) of the applicator have ends (9 ', 9 ") rounded, tapered, fork-shaped or pin-head shaped. Assembly according to any one of the preceding claims, characterized in that it comprises bristles (9) of different length. An assembly according to claim 15, characterized in that the length of the hairs is between about 2 mm and about 25 mm. Assembly according to any one of the preceding claims, characterized in that the bristles (9) have at least one groove (G) and / or at minus a longitudinal or helical edge (C). Assembly according to any one of the preceding claims, characterized in that the bristles have a section chosen from cross-shaped sections; trilobe; tetralobe; full oval; hollow oval (S ₁₂ ); full cylindrical; hollow cylindrical; solid rectangular (S ₁₄ ) hollow rectangular; solid polygonal, such as triangular (S ₁₀ ); hollow polygonal; in the form of “8”, “C” (S ₁₁ ), “E”, “F”, “H”, “I” (S ₉ ), “L” (S ₁₃ ), "N", "S", "T" (S ₈ ), "V", "W; star-shaped or crescent-shaped. Assembly according to any one of the preceding claims, characterized in that the hairs of the applicator are mixed with hairs not with no roughness (P). Assembly according to any one of the preceding claims, characterized in that it comprises at least one tuft (104) made up of said hairs (109), the bristles being substantially parallel to each other, one end of the tuft being fixed to the gripping element (103) by means of a rod (105). Assembly according to claim 20, characterized in that it forms a brush of nail polish, a blush brush, a lip brush or an eyeliner brush. Assembly according to any one of Claims 1 to 19, characterized in that said bristles are oriented, substantially radially, relative to a core (4a) of the application member. Assembly according to claim 19 or 21, characterized in that the applicator forms a mascara brush. Application set (1, 101, 201) according to any one of Claims 20 to 24, characterized in that the product (M, V) is a product of make-up or care, especially eyelashes or nails.

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