EP1374723B1 - Product applicator, especially for cosmetics, and method of manufacturing such an applicator - Google Patents

Product applicator, especially for cosmetics, and method of manufacturing such an applicator Download PDF

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Publication number
EP1374723B1
EP1374723B1 EP03291388A EP03291388A EP1374723B1 EP 1374723 B1 EP1374723 B1 EP 1374723B1 EP 03291388 A EP03291388 A EP 03291388A EP 03291388 A EP03291388 A EP 03291388A EP 1374723 B1 EP1374723 B1 EP 1374723B1
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EP
European Patent Office
Prior art keywords
fibres
curved portions
support
curvature
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP03291388A
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German (de)
French (fr)
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EP1374723A1 (en
Inventor
Guilhem Rousselet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
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LOreal SA
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Publication of EP1374723A1 publication Critical patent/EP1374723A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0238—Bristles with non-round cross-section
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/021—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups arranged like in cosmetics brushes, e.g. mascara, nail polish, eye shadow
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles

Definitions

  • the present invention relates to a device for the application of a product, in particular a cosmetic product, in particular a make-up product and / or a care product.
  • a product in particular a cosmetic product, in particular a make-up product and / or a care product.
  • the product may be applied to the skin, to the nails or to the keratinous fibers, in particular the hair, the eyelashes or the eyebrows.
  • patent literature is full of patents describing devices whose object is to produce new makeup effects or to allow the application of compositions having particular rheologies.
  • devices which are distinguished from each other by the density and / or the shape of their application elements (generally fibers) by their longitudinal and / or transverse profile are described in these patents. by the nature of the material constituting the support and / or the application elements, by the treatment to which all or part of the application device may be subjected, or by any other element of the packaging and application assembly of which the application device is only a constituent part (for example, the wiper).
  • the demand for FR-A-2,668,905 describes a method of obtaining a mascara brush consisting of, after twisting the brush and mowing according to the desired profile, heating the ends of the fibers so as to melt them, and thus create at the end of the fibers small bulges in the form of balls, resulting from the retraction of the polymeric material. After such treatment, the fibers remain substantially straight.
  • the US-A-5,161,554 describes a mascara brush twisted brush type, and whose fibers are of variable section along their longitudinal axis.
  • the fibers may be zig-zag or wavy. This results in fibers having an alternation of curvatures in one direction and then in the other, with an evolutionary radius of curvature between a maximum radius and a minimum radius at each inversion of curvature.
  • the fibers are arranged in the form of a web introduced between the two strands of a U-shaped wire. The latter are then twisted relative to each other so as to configure the fibers in the form of a helical arrangement with several turns.
  • such a curvature is obtained by subjecting all or part of the application device to moderate heating, that is to say at a temperature above the glass transition temperature of the polymer forming said fibers that it is desired to curl, and less than the melting temperature of said polymer in the case of a semi-crystalline polymer.
  • the duration of the heating is adjusted according to the material, the diameter of the fibers, so as to obtain the desired curvature, without causing shrinkage of the material, suitable, as described in the application of FR-A-2,668,905 mentioned above, to cause a substantial shortening of the fibers and to modify the cross section, particularly at the end.
  • the effects especially in terms of makeup effects, may, depending on the rheology of the product to be applied, be considered insufficient.
  • the large curvature of the fibers makes it possible, even in the case where the fiber density, in particular by turn in the case of a twisted brush type mascara brush, is important, to substantially reduce the space requirements. between two successive turns, and create a clutter effect, thus avoiding makeup is done in packets.
  • a nail varnish applicator or nail care composition configured as a brush
  • the curvature of the fibers helps to space them relative to each other, thereby increasing the amount of product that can be retained between the brush fibers.
  • the autonomy of the brush is, therefore, much better.
  • said fibers are of substantially constant curvature from the support to the corresponding free end.
  • substantially constant is meant a variation of radius of curvature of at most 15% around a mean value, and preferably at most 10% around said average value.
  • the applicator device can also be configured in the form of a substantially parallel arrangement of bristles relative to one another, and extending, in the manner of a toothbrush, perpendicular to an axis of said toothbrush support.
  • Such applicators are generally intended to be used in combination with a product packaged in the form of a solid bread, to be moistened before use.
  • the average radius of curvature of the curved portions is preferably between 2 mm and 40 mm. Preferably, it is between 2 and 30 mm. More preferably, it is less than 20 mm, and greater than 3 mm. More preferably, the radius of curvature is between 3 mm and 10 mm.
  • said fibers are made of a thermoplastic material, in particular polyamide, or a thermoplastic elastomer.
  • the thermoplastic material may be 100% amorphous or semi-crystalline.
  • polyamides 6 such as those sold under the trade name Tynex®.
  • the diameter of the fibers may be between 6/100 th of mm and 35/100 th of mm, and preferably between 10/100 th of mm and 25/100 th of mm.
  • the application device comprises fibers or substantially straight fiber portions.
  • it comprises a first group of curved portions having a first average radius of curvature and a second group of curved portions having a second average radius of curvature, distinct from the first.
  • the different radii of curvature of the first and second groups can result from the use of first and second types of fibers made of different materials, in particular having different glass transition temperatures.
  • the different groups of curved portions can, when mixed with each other, participate in obtaining particular application results, especially when it comes to makeup. They can also, when separated from each other, be used for different areas of the region to be treated.
  • the support consists of a twisted core, formed from two strands, in particular of wire, twisted relative to each other, the fibers being fixedly held between the two strands twisted and extending radially. relative to the twisted core, the device being intended for the application of product on the keratinous fibers, in particular the eyelashes or the eyebrows.
  • the fibers are arranged in a helical arrangement, the number of fibers per turn being between 5 and 80, and preferably between 10 and 45.
  • the helical organization of the fibers may be more or less noticeable, even totally imperceptible, on the surface of the applicator, depending on the degree of curvature of the fibers.
  • the cross section of the application device may be circular, or polygonal, in particular triangular, square, or pentagonal. Still other forms can be envisaged.
  • the twisted core can be rectilinear or curved.
  • the twisted core has a plurality of turns that can rise from left to right when the brush is viewed from the front in a vertical position. In this case, the brush is called "left".
  • the twisted core has a plurality of turns rising from the right to the left when the brush is viewed from the front in vertical position.
  • the brush is called "right".
  • the latter may be mixed with each other on the support.
  • the different groups of curved portions may be located at different locations of the support.
  • first and second groups of curved portions may be offset along a longitudinal axis of the support.
  • they are angularly offset around the twisted core.
  • the fibers are heated to a temperature substantially lower than the melting temperature of the material constituting them.
  • the heating of said fibers can be done by convection, in particular by immersion in a heated liquid, or by contact with hot air, or by radiation, especially infrared radiation.
  • the heating is carried out by immersion of the fibers in water heated to about 100 ° C.
  • water heated to about 100 ° C.
  • Such a temperature has proved satisfactory for polyamide 6 fibers whose glass transition temperature is between 50 ° C. and 60 ° C, and whose melting temperature is of the order of 185 ° C.
  • the fibers may be immersed in said liquid for a time ranging from 4 to 25 seconds, and preferably from 7 to 15 seconds.
  • the packaging and application assembly may furthermore comprise a wiper intended to be traversed by the application device, at least during its extraction from the container, so as to dose the amount of product present on and between the fibers.
  • Figure 1 illustrates a conventional brush 50 brush type, as commonly used for makeup eyelashes or eyebrows.
  • the brush 50 comprises a twisted core 51 obtained from a U-folded wire and between the branches of which, prior to the twisting movement, a ply of bristles 52 is introduced. In response to the twisting movement, the bristles 52 are driven in a helical configuration formed of a succession of turns more or less spaced apart.
  • the bristles 52 extend radially to the support and are substantially rectilinear or at least have a large radius of curvature (greater than 60 mm).
  • An unpouched portion of the twisted core 51 is mounted on a rod 53.
  • the end of the rod 53 opposite the brush 50 is generally connected to a member (not shown) forming both a gripping member for the brush 50 , and shutter member for the container with which the brush is associated.
  • Figure 2 shows a brush 1 of the type of that of Figure 1, but according to the invention.
  • the brush 1 is of the "left brush” type, the turns of the twisted core 3 rising from left to right when the brush 1 is front view in vertical position.
  • an unstripped part of the twisted core 3 is fixed to the end of a rod 4.
  • the twisted core 3 of the brush is rectilinear and extends according to an axis X corresponding to the axis of the rod 4.
  • the bristles 2 of the brush unlike the bristles 52 of the brush of the previous figure, are curved over their entire length.
  • the heat treatment to which the fibers are subjected causes a curvature of the fibers which is substantially constant since the support to their free end (s).
  • FIG 11 schematically illustrates the main steps of the manufacture of a brush 1 of the type of that of Figure 2.
  • a first step 200 the bristles are introduced, in the form of a sheet, between the two strands of a wire, which are then twisted. This results in a cylindrical pin 201 of about 15 mm in diameter.
  • the brush 201 is then mowed (step 202) so as to give it a frustoconical profile specific to the desired application.
  • the resultant brush 203 is of a diameter, at its widest end, of about 7 to 8 mm.
  • the bristles of the brush 203 are substantially rectilinear.
  • the brush 203 is immersed for about 8 seconds in water at 100 ° C.
  • the brush 1, resulting from the process just described, has turns that are very little visible, because of the clutter effect generated by the random orientation curvatures of its bristles 2.
  • the bristles are of circular section. Their diameter is of the order of 13/100 th of mm. They are made of polyamide 6.
  • the brush includes 23 to 25 bristles per turn.
  • a cross section of the brush 1 perpendicular to the X axis is, as shown in Figure 3A, circular in shape.
  • the section of the brush 1 is of square cross section.
  • the section of the brush 1 is of triangular shape.
  • the cross section of the bristles 2 may be of different shapes.
  • the bristles 2 are solid and of circular section.
  • the bristles 2 are of four-leaf clover-shaped section.
  • the bristles 2 are of triangular section.
  • the bristles 2 are of rice-grain section.
  • the bristles 2 are hollow and of annular section.
  • the bristles 2 are of C-shaped section.
  • the brush 1 may comprise bristles 2 of a single type of section, or bristles of different sections, in a mixture.
  • Portion 5 is used for the application of the product on the eyelashes.
  • Portion 6 is used for lash separation.
  • portion 5 is used for the application of the product on the eyelashes.
  • Portion 6 is used for lash separation.
  • the brush 1 according to the variant of Figure 7 differs from the brush according to Figure 2 in that the twisted core 3 is curved, the curvature corresponding substantially to the curvature of the eyelash implantation line on the eyelid.
  • the brush 1 according to the variant of FIG. 8 differs from the brush according to FIG. 2 in that it is of the "straight brush” type, the turns of the twisted core 3 rising from the right to the left when the brush 1 is seen from the front in vertical position.
  • the application device 81 is configured in the form of a brush intended for the application of varnish on the nails. It comprises a tuft of bristles 82 stapled at the end of a rod 83 of axis X.
  • the bristles 82 are oriented substantially parallel to the X axis (angle relative to the X axis less than 45 °).
  • the end of the rod 83 opposite the tuft of bristles 82 is connected to an element 84 forming both a gripping member for the brush 81, and a closure element for the container with which the brush is associated.
  • the curvature of the bristles 82 of the brush 81 is obtained in the same manner as for the curvature of the bristles of the mascara brushes of the preceding figures, simply by immersing the brush 81 for about 10 seconds in water at 100 ° C. .
  • FIG. 10 shows a packaging and application assembly 100, equipped with an application device 1 of the type described above with reference to FIGS. 2 to 8.
  • the assembly 100 comprises a container 101 containing a stock of cosmetic product such as mascara and an applicator 110.
  • the applicator 110 comprises an application device 1, of twisted brush type, attached to one end of a rod 4 of axis X. The other end of the rod 4 is secured to a gripping element 7 which also constitutes a closing cap of the container 101.
  • the container 101 comprises a wiper member 106 constituted in this case by a cylindrical sleeve whose end ends with a flexible, annular lip, 107.
  • the application device 1 In the mounted position of the applicator 110 on the container 101, the application device 1 is in its entirety between the wiper lip 107 and the bottom of the container.
  • wiper members may be used, for example an open or semi open cell foam block, traversed axially by a slot or a passage, the edges of which delimit it are substantially contiguous in the absence of constraint.
  • the user unscrews the cap formed by the gripping member 7, and extracts the applicator 110 from the container 101.
  • application device 1 is passed through the wiper member 106, so as to dose the amount of product distributed on the teeth or on the bristles.
  • the extraction movement of the applicator is of substantially longitudinal direction to the axis X.
  • the user puts the applicator back into the container, again passing the application device 1 through the wiper member 106.

Abstract

The applicator has a head (1) consisting of a support (3) with bristles (2) made from polymer fibres, at least some of which have curved portions with a radius of curvature of between 2 and 40 mm, and preferably between 3 and 10 mm. The curved portions of the bristles are located in a random arrangement relative to one another. The applicator has a head (1) consisting of a support (3) with bristles (2) made from polymer fibres, at least some of which have curved portions with a radius of curvature of between 2 and 40 mm, and preferably between 3 and 10 mm. The curved portions of the bristles are located in a random arrangement relative to one another. The bristles have a preferably thickness of 0.010 to 0.025 mm, and the applicator head can have various cross-sectional shapes, e.g. circular or polygonal, especially square or triangular. The support is of twisted wire strands and can be straight or curved.

Description

La présente invention a trait à un dispositif pour l'application d'un produit, notamment cosmétique, en particulier de maquillage et/ou de soin. Le produit peut être à appliquer sur la peau, sur les ongles ou sur les fibres kératiniques, notamment les cheveux, les cils ou les sourcils.The present invention relates to a device for the application of a product, in particular a cosmetic product, in particular a make-up product and / or a care product. The product may be applied to the skin, to the nails or to the keratinous fibers, in particular the hair, the eyelashes or the eyebrows.

Dans le domaine du maquillage, les cosméticiens sont sans cesse à la recherche de nouveaux effets.In the field of makeup, cosmeticians are constantly looking for new effects.

Cela est vrai en particulier dans le domaine des mascaras, où l'on cherche à obtenir des maquillages qui peuvent être chargeants, naturels, recourbants, allongeants, ou qui résultent d'un mixte entre ces différentes caractéristiques de base.This is true in particular in the field of mascaras, where one seeks to obtain make-ups that can be loaded, natural, curling, elongating, or that result from a combination of these different basic characteristics.

La recherche de nouveaux dispositifs d'application peut également être guidée par l'apparition de nouvelles compositions de maquillage, qui, en raison de leur rhéologie, ne peuvent pas être appliquées avec des applicateurs conventionnels.The search for new application devices can also be guided by the appearance of new makeup compositions, which, because of their rheology, can not be applied with conventional applicators.

Ainsi, la littérature brevets fourmille de brevets décrivant des dispositifs dont l'objet est de produire de nouveaux effets de maquillage ou de permettre l'application de compositions ayant des rhéologies particulières.Thus, the patent literature is full of patents describing devices whose object is to produce new makeup effects or to allow the application of compositions having particular rheologies.

A titre d'exemples, sont décrits dans ces brevets des dispositifs qui se distinguent les uns relativement aux autres par la densité et/ou la forme de leurs éléments d'application (généralement des fibres), par leur profil, longitudinal et/ou transversal, par la nature du matériau constituant le support et/ou les éléments d'application, par le traitement auquel peut être soumis tout ou partie du dispositif d'application, ou par tout autre élément de l'ensemble de conditionnement et d'application dont le dispositif d'application n'est qu'une partie constitutive (par exemple, l'essoreur).By way of examples, devices which are distinguished from each other by the density and / or the shape of their application elements (generally fibers) by their longitudinal and / or transverse profile are described in these patents. by the nature of the material constituting the support and / or the application elements, by the treatment to which all or part of the application device may be subjected, or by any other element of the packaging and application assembly of which the application device is only a constituent part (for example, the wiper).

Ainsi, de manière plus spécifique, la demande de brevet FR-A-2 668 905 décrit un procédé d'obtention d'une brosse à mascara consistant à, après torsadage de la brosse et tonte selon le profil souhaité, à chauffer le bout des fibres de manière à les faire fondre, et à créer ainsi au bout des fibres des petits renflements sous forme de boules, résultant de la rétractation de la matière polymérique. Après un tel traitement, les fibres restent sensiblement rectilignes.So, more specifically, the demand for FR-A-2,668,905 describes a method of obtaining a mascara brush consisting of, after twisting the brush and mowing according to the desired profile, heating the ends of the fibers so as to melt them, and thus create at the end of the fibers small bulges in the form of balls, resulting from the retraction of the polymeric material. After such treatment, the fibers remain substantially straight.

Selon un autre exemple, le brevet US-A-5 161 554 décrit une brosse à mascara de type brosse torsadée, et dont les fibres sont de section variable selon leur axe longitudinal. Les fibres peuvent être en forme de zig-zag ou ondulées. Il en résulte des fibres présentant une alternance de courbures dans un sens, puis dans l'autre, avec un rayon de courbure évolutif entre un rayon maximum et un rayon minimum au niveau de chaque inversion de courbure.In another example, the US-A-5,161,554 describes a mascara brush twisted brush type, and whose fibers are of variable section along their longitudinal axis. The fibers may be zig-zag or wavy. This results in fibers having an alternation of curvatures in one direction and then in the other, with an evolutionary radius of curvature between a maximum radius and a minimum radius at each inversion of curvature.

Dans ce document, sont décrits un certain nombre d'opérations, notamment pendant l'extrusion des fibres, ou après extrusion, de manière à leur conférer le profil souhaité.In this document, a number of operations are described, especially during the extrusion of the fibers, or after extrusion, so as to give them the desired profile.

Après traitement, de manière conventionnelle, les fibres sont disposées sous forme d'une nappe introduite entre les deux brins d'un fil de fer en U. Ces derniers sont ensuite torsadés l'un relativement à l'autre, de manière à configurer les fibres sous forme d'un arrangement hélicoïdal à plusieurs spires.After treatment, conventionally, the fibers are arranged in the form of a web introduced between the two strands of a U-shaped wire. The latter are then twisted relative to each other so as to configure the fibers in the form of a helical arrangement with several turns.

A l'expérience, on s'aperçoit que :

  1. i) lorsque les déformations sont générées pendant le processus d'extrusion des fibres, du fait du processus d'extrusion lui-même, elles sont forcément à rayon de courbure minimal important ; et
  2. ii) lorsque les déformations résultent d'un traitement après extrusion elles sont également de rayon de courbure minimal important, faute de quoi, leur manipulation automatisée pour les mettre sous forme d'une nappe à disposer entre les deux brins du fil de fer en U, et en vue de torsader les deux brins du fil de fer, serait des plus problématiques.
Experience shows that:
  1. i) when the deformations are generated during the extrusion process of the fibers, due to the extrusion process itself, they necessarily have a large minimum radius of curvature; and
  2. ii) when the deformations result from an extrusion treatment they also have a large minimum radius of curvature, failing which, their automated manipulation to put them in the form of a sheet to be placed between the two strands of the U-shaped wire. , and in order to twist the two strands of the wire, would be most problematic.

Il est connu également de réaliser des brosses à mascara par moulage. Le moule est conçu de sorte que l'extrémité libre des éléments d'application, qui, d'une manière générale sont rectilignes, se termine par une portion en forme de fourche, ou en forme de crochet. Du fait de l'obtention de ces portions d'extrémité par moulage, leurs orientations relatives sont prédéterminées. Les résultats en termes de maquillage sont décevants. En outre, il est nécessaire d'avoir un moule par type de maquillage recherché.It is also known to make mascara brushes by molding. The mold is designed so that the free end of the applicator elements, which generally are straight, ends in a fork-shaped, or hook-shaped portion. Due to obtaining these end portions by molding, their relative orientations are predetermined. The results in terms of makeup are disappointing. In addition, it is necessary to have a mold by type of makeup sought.

Il est connu en outre, pour des brosses à mascara, de meuler ou d'abraser les extrémités libres des fibres de manière à les éclater en de multiples brins. D'un tel traitement purement mécanique, peuvent résulter des portions de fibres de forme courbe. Ces portions courbes sont toutefois strictement localisées aux extrémités des fibres. En outre, les rayons de courbure obtenus descendent difficilement en dessous de 50 mm.It is also known, for mascara brushes, to grind or abrade the free ends of the fibers so as to burst them into multiple strands. Such a purely mechanical treatment may result in portions of curved fibers. These curved portions are, however, strictly localized at the ends of the fibers. In addition, the radii of curvature obtained difficult to descend below 50 mm.

Avec de tels rayons de courbure, les effets en termes de résultat maquillage, sont à peine perceptibles.With such radii of curvature, the effects in terms of makeup result, are hardly noticeable.

Aussi, est-ce un des objets de la présente demande que de réaliser un dispositif d'application, en particulier pour un produit de maquillage et/ou de soin, résolvant en tout ou partie les problèmes discutés en référence aux dispositifs connus.Also, is it an object of the present application to provide an application device, in particular for a make-up and / or care product, solving all or part of the problems discussed with reference to known devices.

C'est en particulier un objet de l'invention que de réaliser un dispositif d'application d'un produit de maquillage et/ou de soin, constituant une solution alternative en vue de l'obtention de certains effets maquillage, ou offrant la possibilité d'obtenir des maquillages différents des maquillages obtenus avec les dispositifs conventionnels.It is in particular an object of the invention to provide a device for applying a make-up and / or care product, constituting an alternative solution for obtaining certain makeup effects, or offering the possibility of to obtain makeup different makeup obtained with conventional devices.

C'est un autre objet de l'invention que de réaliser un dispositif économique à réaliser.It is another object of the invention to provide a cost effective device.

C'est encore un autre objet de l'invention que de réaliser un procédé de fabrication d'un applicateur, en particulier pour un produit de soin et/ou de maquillage, et qui soit simple et économique à mettre en oeuvre sur un outil industriel.It is yet another object of the invention to provide a method for manufacturing an applicator, in particular for a skincare and / or make-up product, which is simple and inexpensive to use on an industrial tool. .

D'autres objets encore apparaîtront dans la description détaillée qui suit.Still other objects will appear in the following detailed description.

Selon l'invention, ces objets sont atteints en réalisant un dispositif pour l'application d'un produit, notamment de maquillage et/ou de soin, comprenant un arrangement de fibres polymériques ayant au moins une extrémité libre, lesdites fibres étant montées fixement sur un support et présentant, au moins pour certaines, au moins une portion courbe qui :

  1. i) s'étend continûment depuis le support jusqu'à une (ou leur) extrémité libre, et
  2. ii) est de rayon de courbure moyen inférieur à 45 mm, lesdites portions courbes étant orientées les unes relativement aux autres de manière aléatoire.
According to the invention, these objects are achieved by providing a device for the application of a product, in particular makeup and / or care, comprising an arrangement of polymeric fibers having at least one free end, said fibers being fixedly mounted on a support and having, at least for some, at least one curved portion which:
  1. i) extends continuously from the support to a (or their) free end, and
  2. ii) has a mean radius of curvature of less than 45 mm, said curved portions being randomly oriented relative to each other.

Par "continûment", on entend sans inversion du sens de la courbure entre le support et l'extrémité libre.By "continuously" is meant without inversion of the direction of the curvature between the support and the free end.

De préférence, on obtient une telle courbure en soumettant tout ou partie du dispositif d'application à un chauffage modéré, c'est à dire à une température supérieure à la température de transition vitreuse du polymère formant lesdits fibres que l'on souhaite recourber, et inférieure à la température de fusion dudit polymère dans le cas d'un polymère semi-cristallin.Preferably, such a curvature is obtained by subjecting all or part of the application device to moderate heating, that is to say at a temperature above the glass transition temperature of the polymer forming said fibers that it is desired to curl, and less than the melting temperature of said polymer in the case of a semi-crystalline polymer.

La durée du chauffage est ajustée en fonction du matériau, du diamètre des fibres, de manière à obtenir la courbure souhaitée, et ce sans causer de rétractation de la matière, apte, comme décrit dans la demande de brevet FR-A-2 668 905 évoquée ci-avant, à engendrer un raccourcissement sensible des fibres et à en modifier la section transversale, en particulier, en bout.The duration of the heating is adjusted according to the material, the diameter of the fibers, so as to obtain the desired curvature, without causing shrinkage of the material, suitable, as described in the application of FR-A-2,668,905 mentioned above, to cause a substantial shortening of the fibers and to modify the cross section, particularly at the end.

Au dessus de la valeur limite d'environ 45 mm, les effets, notamment en termes d'effets maquillage, peuvent, en fonction notamment de la rhéologie du produit à appliquer, être jugés insuffisants.Above the limit value of about 45 mm, the effects, especially in terms of makeup effects, may, depending on the rheology of the product to be applied, be considered insufficient.

La courbure importante des fibres permet, même dans l'hypothèse où la densité de fibres, en particulier par spire dans le cas d'une brosse à mascara de type brosse torsadée, est importante, de réduire de manière substantielle les espaces entre deux spires successives, et de créer un effet de fouillis, évitant ainsi que le maquillage ne se fasse par paquets.The large curvature of the fibers makes it possible, even in the case where the fiber density, in particular by turn in the case of a twisted brush type mascara brush, is important, to substantially reduce the space requirements. between two successive turns, and create a clutter effect, thus avoiding makeup is done in packets.

En réalité, en jouant sur le rayon de courbure des fibres, en combinaison avec d'autres paramètres tels que la densité des fibres, leur diamètre, la forme de leur section transversale, ou la forme de la brosse, il est possible de passer d'un maquillage des plus naturels à un maquillage des plus chargeants, et/ou d'obtenir plus ou moins d'allongement et/ou de recourbement.In fact, by playing on the radius of curvature of the fibers, in combination with other parameters such as the density of the fibers, their diameter, the shape of their cross-section, or the shape of the brush, it is possible to go from a most natural make-up to a makeup of the most charging, and / or to obtain more or less elongation and / or bending.

Du fait de cette courbure importante, il est possible en outre, dans le cas d'un applicateur destiné au maquillage, d'obtenir des maquillages nouveaux, relativement aux maquillages obtenus avec des applicateurs conventionnels, et ce, à compositions de maquillage identiques.Due to this important curvature, it is also possible, in the case of an applicator intended for make-up, to obtain novel make-ups, relative to make-ups obtained with conventional applicators, and this, with identical makeup compositions.

Dans le cas d'un applicateur de vernis à ongles ou d'une composition de soin des ongles, configuré sous forme d'un pinceau, la courbure des fibres contribue à les espacer les unes relativement aux autres, augmentant ainsi la quantité de produit qui peut être retenue entre les fibres du pinceau. L'autonomie du pinceau est, de ce fait, bien meilleure.In the case of a nail varnish applicator or nail care composition, configured as a brush, the curvature of the fibers helps to space them relative to each other, thereby increasing the amount of product that can be retained between the brush fibers. The autonomy of the brush is, therefore, much better.

En outre, du fait de cette configuration particulière de la (ou des) touffe(s) de fibres d'un tel pinceau, des effets marbrés peuvent être obtenus sur l'ongle.In addition, because of this particular configuration of the (or) tuft (s) of fibers of such a brush, marbled effects can be obtained on the nail.

De préférence, lesdites fibres sont de courbure sensiblement constante depuis le support jusqu'à l'extrémité libre correspondante. Par "sensiblement constante", on entend une variation de rayon de courbure d'au plus 15% autour d'une valeur moyenne, et de préférence, d'au plus 10% autour de ladite valeur moyenne.Preferably, said fibers are of substantially constant curvature from the support to the corresponding free end. By "substantially constant" is meant a variation of radius of curvature of at most 15% around a mean value, and preferably at most 10% around said average value.

Selon l'invention, le dispositif d'application peut également être configuré sous forme d'un arrangement de poils sensiblement parallèles les uns relativement aux autres, et s'étendant, à la manière d'une brosse à dents, perpendiculairement à un axe dudit support. De tels applicateurs sont généralement destinés à être utilisés en combinaison avec un produit conditionné sous forme d'un pain solide, à humecter avant utilisation.According to the invention, the applicator device can also be configured in the form of a substantially parallel arrangement of bristles relative to one another, and extending, in the manner of a toothbrush, perpendicular to an axis of said toothbrush support. Such applicators are generally intended to be used in combination with a product packaged in the form of a solid bread, to be moistened before use.

Le rayon de courbure moyen des portions courbes est compris de préférence entre 2 mm et 40 mm. De préférence, il est compris entre 2 et 30 mm. De préférence encore, il est inférieur à 20 mm, et supérieur à 3 mm. De préférence encore, le rayon de courbure est compris entre 3 mm et 10 mm.The average radius of curvature of the curved portions is preferably between 2 mm and 40 mm. Preferably, it is between 2 and 30 mm. More preferably, it is less than 20 mm, and greater than 3 mm. More preferably, the radius of curvature is between 3 mm and 10 mm.

Avantageusement, lesdits fibres sont réalisées en un matériau thermoplastique, notamment en polyamide, ou en un élastomère thermoplastique. Le matériau thermoplastique peut être amorphe à 100% ou semi cristallin.Advantageously, said fibers are made of a thermoplastic material, in particular polyamide, or a thermoplastic elastomer. The thermoplastic material may be 100% amorphous or semi-crystalline.

A titres d'exemples, on peut citer des polyamides 6 tels que ceux commercialisés sous la marque Tynex®.By way of examples, mention may be made of polyamides 6 such as those sold under the trade name Tynex®.

Le diamètre des fibres peut être compris entre 6/100eme de mm et 35/100eme de mm, et, de préférence, entre 10/100eme de mm et 25/100eme de mm.The diameter of the fibers may be between 6/100 th of mm and 35/100 th of mm, and preferably between 10/100 th of mm and 25/100 th of mm.

Selon un mode de réalisation particulier, le dispositif d'application comprend des fibres ou portions de fibres sensiblement rectilignes.According to a particular embodiment, the application device comprises fibers or substantially straight fiber portions.

Alternativement, il comprend un premier groupe de portions courbes ayant un premier rayon de courbure moyen et un second groupe de portions courbes ayant un second rayon de courbure moyen, distinct du premier.Alternatively, it comprises a first group of curved portions having a first average radius of curvature and a second group of curved portions having a second average radius of curvature, distinct from the first.

Les différents rayons de courbure des premier et second groupes peuvent résulter de l'utilisation de premier et second types de fibres formées de matériaux différents, ayant notamment des température de transition vitreuse différentes.The different radii of curvature of the first and second groups can result from the use of first and second types of fibers made of different materials, in particular having different glass transition temperatures.

Toutefois, de telles différences peuvent également être obtenues avec des fibres formées de matériaux identiques. Dans ce cas de figure, plusieurs possibilités existent :

  1. i) les conditions de traitement thermique auxquelles sont soumises les portions courbes des deux groupes sont différentes, en terme de température ou de durée de chauffage ; ou
  2. ii) les portions courbes du premier groupe sont des portions de fibres dont le diamètre et/ou la forme sont différents du diamètre et/ou de la forme de fibres dont sont issues les portions courbes du second groupe.
However, such differences can also be achieved with fibers made of identical materials. In this case, several possibilities exist:
  1. i) the heat treatment conditions to which the curved portions of the two groups are subjected are different in terms of temperature or heating time; or
  2. ii) the curved portions of the first group are portions of fibers whose diameter and / or shape are different from the diameter and / or the shape of the fibers from which the curved portions of the second group are derived.

Ainsi, on peut utiliser, seuls ou en mélanges, des poils pleins ou creux, de section circulaire, triangulaire, allongée, en forme de C, ou en forme de trèfle à quatre feuilles (quadrilobe). D'autres formes encore peuvent être utilisées.Thus, it is possible to use, alone or in mixtures, solid or hollow hairs, of circular, triangular, elongated, C-shaped, or four-leaf clover (quadrilobe) section. Still other forms can be used.

Les différents groupes de portions courbes peuvent, lorsqu'ils sont en mélange les uns avec les autres, participer à l'obtention de résultats d'application particulier, en particulier lorsqu'il s'agit de maquillage. Ils peuvent également, lorsqu'ils sont séparés les uns des autres, être utilisés pour des zones différentes de la région à traiter.The different groups of curved portions can, when mixed with each other, participate in obtaining particular application results, especially when it comes to makeup. They can also, when separated from each other, be used for different areas of the region to be treated.

Avantageusement, le support est constitué d'une âme torsadée, formée à partir de deux brins, notamment de fil de fer, torsadés l'un relativement à l'autre, les fibres étant maintenues fixement entre les deux brins torsadés et s'étendant radialement relativement à l'âme torsadée, le dispositif étant destiné à l'application de produit sur les fibres kératiniques, notamment les cils ou les sourcils.Advantageously, the support consists of a twisted core, formed from two strands, in particular of wire, twisted relative to each other, the fibers being fixedly held between the two strands twisted and extending radially. relative to the twisted core, the device being intended for the application of product on the keratinous fibers, in particular the eyelashes or the eyebrows.

Avec un dispositif d'application selon ce mode de réalisation préférentiel, chaque fibre, maintenue sensiblement en son milieu par l'âme torsadée, comprend deux portions s'étendant chacune depuis le support jusqu'à une extrémité libre correspondante. Sur un tel applicateur, pourront être présentes :

  1. i) des fibres dont les deux portions sont courbes, à courbures identiques ou différentes ;
  2. ii) des fibres dont une portion est courbe et dont l'autre portion est rectiligne ; et, éventuellement
  3. iii) en mélange avec des fibres de l'une et/ou l'autre des catégories i) et ii), des fibres dont les deux portions sont rectilignes.
With an application device according to this preferred embodiment, each fiber, held substantially in the middle by the twisted core, comprises two portions each extending from the support to a corresponding free end. On such an applicator, may be present:
  1. i) fibers whose two portions are curved, with identical or different curvatures;
  2. (ii) fibers of which one portion is curved and the other portion is straight; and eventually
  3. iii) mixed with fibers of one and / or other of categories i) and ii), fibers of which both portions are rectilinear.

De préférence, les fibres sont arrangées selon un arrangement hélicoïdal, le nombre de fibres par spire étant compris entre 5 et 80, et de préférence, entre 10 et 45. L'organisation hélicoïdale des fibres peut être plus ou moins perceptible, voire totalement imperceptible, à la surface de l'applicateur, en fonction du degré de courbure des fibres.Preferably, the fibers are arranged in a helical arrangement, the number of fibers per turn being between 5 and 80, and preferably between 10 and 45. The helical organization of the fibers may be more or less noticeable, even totally imperceptible, on the surface of the applicator, depending on the degree of curvature of the fibers.

La section transversale du dispositif d'application peut être circulaire, ou polygonale, notamment triangulaire, carrée, ou pentagonale. D'autres formes encore peuvent être envisagées.The cross section of the application device may be circular, or polygonal, in particular triangular, square, or pentagonal. Still other forms can be envisaged.

L'âme torsadée peut être rectiligne ou courbe.The twisted core can be rectilinear or curved.

L'âme torsadée présente une pluralité de spires pouvant monter de la gauche vers la droite lorsque la brosse est vue de face en position verticale. Dans ce cas, la brosse est qualifiée de "gauche".The twisted core has a plurality of turns that can rise from left to right when the brush is viewed from the front in a vertical position. In this case, the brush is called "left".

Alternativement, l'âme torsadée présente une pluralité de spires montant de la droite vers la gauche lorsque la brosse est vue de face en position verticale. Dans ce cas, la brosse est qualifiée de "droite".Alternatively, the twisted core has a plurality of turns rising from the right to the left when the brush is viewed from the front in vertical position. In this case, the brush is called "right".

Dans le cas d'un applicateur à plusieurs groupes de portions courbes de différentes courbures, ces dernières peuvent être en mélange les unes avec les autres sur le support.In the case of an applicator with several groups of curved portions of different curvatures, the latter may be mixed with each other on the support.

Alternativement, les différents groupes de portions courbes peuvent être implantés en des endroits distincts du support.Alternatively, the different groups of curved portions may be located at different locations of the support.

Ainsi, les premier et second groupes de portions courbes peuvent être décalés le long d'un axe longitudinal du support.Thus, the first and second groups of curved portions may be offset along a longitudinal axis of the support.

Alternativement, ils sont décalés angulairement autour de l'âme torsadée.Alternatively, they are angularly offset around the twisted core.

Selon un autre aspect de l'invention, on réalise également un procédé de fabrication d'un dispositif pour l'application d'un produit, notamment de maquillage et/ou de soin, comprenant les étapes suivantes :

  1. i) disposer fixement une pluralité de fibres polymériques sur un support, et
  2. ii) après fixation des fibres au support, exposer au moins une partie des fibres à une température supérieure à la température de transition vitreuse du matériau polymérique qui les constitue, pendant une durée telle :
    1. a) que lesdites fibres présentent au moins une portion courbe ; et que
    2. b) la longueur desdites fibres soit sensiblement inchangée.
According to another aspect of the invention, a method of manufacturing a device for the application of a product, in particular makeup and / or care, comprising the following steps is also realized:
  1. i) fixedly disposing a plurality of polymeric fibers on a support, and
  2. ii) after fixing the fibers to the support, exposing at least a portion of the fibers at a temperature above the glass transition temperature of the polymeric material constituting them for a period such that:
    1. a) that said fibers have at least one curved portion; and
    2. b) the length of said fibers is substantially unchanged.

Dans le cas d'un matériau semi-cristallin, les fibres sont chauffées à une température sensiblement inférieure à la température de fusion du matériau qui les constitue.In the case of a semicrystalline material, the fibers are heated to a temperature substantially lower than the melting temperature of the material constituting them.

Le chauffage desdites fibres peut s'effectuer par convection, notamment par immersion dans un liquide chauffé, ou par mise en contact avec de l'air chaud, ou par rayonnement, notamment infrarouge.The heating of said fibers can be done by convection, in particular by immersion in a heated liquid, or by contact with hot air, or by radiation, especially infrared radiation.

De préférence, le chauffage s'effectue par immersion des fibres dans de l'eau chauffée à environ 100° C. Une telle température s'est avérée satisfaisante pour des fibres de polyamide 6 dont la température de transition vitreuse est comprise entre 50°C et 60°C, et dont la température de fusion est de l'ordre de 185°C.Preferably, the heating is carried out by immersion of the fibers in water heated to about 100 ° C. Such a temperature has proved satisfactory for polyamide 6 fibers whose glass transition temperature is between 50 ° C. and 60 ° C, and whose melting temperature is of the order of 185 ° C.

Les fibres peuvent être immergées dans ledit liquide pendant une durée allant de 4 à 25 secondes, et de préférence, de 7 à 15 secondes.The fibers may be immersed in said liquid for a time ranging from 4 to 25 seconds, and preferably from 7 to 15 seconds.

A titre purement indicatif, pour une brosse torsadée comportant des fibres de polyamide 6 dont le diamètre est de 13/100eme de mm, la courbure maximale est obtenue après 8 secondes de chauffage dans de l'eau à 100 °C.As a purely indicative, for a twisted brush comprising polyamide 6 fibers whose diameter is 13/100 th of mm, the maximum curvature is obtained after 8 seconds of heating in water at 100 ° C.

Selon encore un autre aspect, l'invention vise un ensemble de conditionnement et d'application d'un produit, notamment cosmétique, comprenant :

  1. a) un réservoir contenant le produit à appliquer ; et
  2. b) un dispositif d'application selon l'invention.
According to yet another aspect, the invention relates to a set of packaging and application of a product, in particular a cosmetic product, comprising:
  1. a) a reservoir containing the product to be applied; and
  2. b) an application device according to the invention.

L'ensemble de conditionnement et d'application peut comprendre en outre un essoreur destiné à être traversé par le dispositif d'application, au moins lors de son extraction du récipient, de manière à doser la quantité de produit présent sur, et entre, les fibres.The packaging and application assembly may furthermore comprise a wiper intended to be traversed by the application device, at least during its extraction from the container, so as to dose the amount of product present on and between the fibers.

L'invention consiste, mises à part les dispositions exposées ci-dessus, en un certain nombre d'autres dispositions qui seront explicitées ci-après, à propos d'exemples de réalisation non limitatifs, décrits en référence aux figures annexées, parmi lesquelles :

  • la figure 1 représente un applicateur de type brosse torsadée, conforme à la technique antérieure à la présente invention ;
  • le figure 2 représente de façon schématique un dispositif d'application selon un premier mode de réalisation de l'invention ;
  • les figures 3A-3C illustrent de façon schématique différentes sections transversales d'un dispositif d'application selon la figure 2 ;
  • les figures 4A-4F illustrent différentes sections transversales de fibres pouvant être utilisées dans un dispositif d'application selon l'invention ;
  • la figure 5 représente de façon schématique un dispositif d'application selon un second mode de réalisation de l'invention ;
  • la figure 6 représente de façon schématique un dispositif d'application selon un troisième mode de réalisation de l'invention ;
  • la figure 7 représente de façon schématique un dispositif d'application selon un quatrième mode de réalisation de l'invention ;
  • la figure 8 représente de façon schématique un dispositif d'application selon un cinquième mode de réalisation de l'invention ;
  • la figure 9 représente de façon schématique un dispositif d'application selon un sixième mode de réalisation de l'invention ;
  • la figure 10 représente de façon schématique un ensemble de conditionnement et d'application utilisant un dispositif d'application selon l'invention ; et
  • la figure 11 représente de façon schématique les différentes étapes du procédé de fabrication selon un mode de réalisation de l'invention.
The invention consists, apart from the arrangements described above, in a certain number of other arrangements which will be explained below, with reference to nonlimiting exemplary embodiments, described with reference to the appended figures, among which:
  • Figure 1 shows a twisted brush type applicator according to the prior art of the present invention;
  • FIG. 2 schematically represents an application device according to a first embodiment of the invention;
  • Figures 3A-3C schematically illustrate different cross sections of an application device according to Figure 2;
  • FIGS. 4A-4F illustrate different cross sections of fibers that can be used in an application device according to the invention;
  • FIG. 5 schematically represents an application device according to a second embodiment of the invention;
  • FIG. 6 schematically represents an application device according to a third embodiment of the invention;
  • FIG. 7 schematically represents an application device according to a fourth embodiment of the invention;
  • FIG. 8 schematically represents an application device according to a fifth embodiment of the invention;
  • Figure 9 schematically shows an application device according to a sixth embodiment of the invention;
  • Figure 10 schematically shows a packaging and application assembly using an application device according to the invention; and
  • Figure 11 shows schematically the various steps of the manufacturing method according to one embodiment of the invention.

La figure 1 illustre une brosse conventionnelle 50 de type goupillon, telle qu'utilisée couramment pour le maquillage des cils ou des sourcils.Figure 1 illustrates a conventional brush 50 brush type, as commonly used for makeup eyelashes or eyebrows.

La brosse 50 comprend une âme torsadée 51 obtenue à partir d'un fil de fer replié en U et entre les branches duquel, préalablement au mouvement de torsadage, on introduit une nappe de poils 52. En réponse au mouvement de torsadage, les poils 52 sont entraînés dans une configuration hélicoïdale formée d'une succession de spires plus ou moins écartées. Les poils 52 s'étendent radialement au support et sont sensiblement rectilignes ou du moins, présentent un rayon de courbure important (supérieur à 60 mm).The brush 50 comprises a twisted core 51 obtained from a U-folded wire and between the branches of which, prior to the twisting movement, a ply of bristles 52 is introduced. In response to the twisting movement, the bristles 52 are driven in a helical configuration formed of a succession of turns more or less spaced apart. The bristles 52 extend radially to the support and are substantially rectilinear or at least have a large radius of curvature (greater than 60 mm).

Une portion non empoilée de l'âme torsadée 51 est montée sur une tige 53. L'extrémité de la tige 53 opposée à la brosse 50 est reliée généralement à un élément (non représenté) formant à la fois organe de préhension pour la brosse 50, et élément d'obturation pour le récipient auquel est associée la brosse.An unpouched portion of the twisted core 51 is mounted on a rod 53. The end of the rod 53 opposite the brush 50 is generally connected to a member (not shown) forming both a gripping member for the brush 50 , and shutter member for the container with which the brush is associated.

La figure 2 représente une brosse 1 du type de celle de la figure 1, mais conforme à l'invention.Figure 2 shows a brush 1 of the type of that of Figure 1, but according to the invention.

Selon ce mode de réalisation, et de la même manière que celle 50 de la figure 1, la brosse 1 est du type "brosse gauche", les spires de l'âme torsadée 3 montant de la gauche vers la droite lorsque la brosse 1 est vue de face en position verticale.According to this embodiment, and in the same manner as that 50 of Figure 1, the brush 1 is of the "left brush" type, the turns of the twisted core 3 rising from left to right when the brush 1 is front view in vertical position.

De la même manière que pour la brosse de la figure 1, une partie non empoilée de l'âme torsadée 3 est fixée à l'extrémité d'une tige 4. L'âme torsadée 3 de la brosse est rectiligne et s'étend selon un axe X correspondant à l'axe de la tige 4.In the same way as for the brush of FIG. 1, an unstripped part of the twisted core 3 is fixed to the end of a rod 4. The twisted core 3 of the brush is rectilinear and extends according to an axis X corresponding to the axis of the rod 4.

Les poils 2 de la brosse, à la différence des poils 52 de la brosse de la figure précédente, sont courbes sur toute leur longueur.The bristles 2 of the brush, unlike the bristles 52 of the brush of the previous figure, are curved over their entire length.

Leur courbure moyenne, mesurée à l'aide d'un projecteur de profil avec un grossissement de 10, est de l'ordre de 3 à 10 mm. Le projecteur de profil utilisé est un projecteur de profil vendu sous la référence commerciale H562 par la Société HAUSER®.Their average curvature, measured using a profile projector with a magnification of 10, is of the order of 3 to 10 mm. The profile projector used is a profile projector sold under the trade reference H562 by the company HAUSER®.

Bien que les courbures des fibres les unes relativement aux autres soient d'orientation aléatoire, on a observé que, dans un exemple de mise en oeuvre préférentielle, le traitement thermique auquel sont soumises les fibres cause une courbure de ces dernières qui est sensiblement constante depuis le support jusqu'à leur(s) extrémité(s) libre(s).Although the curvatures of the fibers relative to each other are of random orientation, it has been observed that, in an example of a preferred embodiment, the heat treatment to which the fibers are subjected causes a curvature of the fibers which is substantially constant since the support to their free end (s).

La figure 11, à laquelle il est maintenant fait référence, illustre schématiquement les principales étapes de la fabrication d'une brosse 1 du type de celle de la figure 2.Figure 11, to which reference is now made, schematically illustrates the main steps of the manufacture of a brush 1 of the type of that of Figure 2.

Dans une première étape, 200, les poils sont introduits, sous forme d'une nappe, entre les deux brins d'un fil de fer, lesquels sont ensuite torsadés. Il en résulte un goupillon cylindrique 201 d'environ 15 mm de diamètre.In a first step, 200, the bristles are introduced, in the form of a sheet, between the two strands of a wire, which are then twisted. This results in a cylindrical pin 201 of about 15 mm in diameter.

Le goupillon 201 est ensuite tondu (étape 202) de manière à lui conférer un profil tronconique propre à l'application recherchée. La brosse qui en résulte 203 est d'un diamètre, à son extrémité la plus large, d'environ 7 à 8 mm. Les poils de la brosse 203 sont sensiblement rectilignes.The brush 201 is then mowed (step 202) so as to give it a frustoconical profile specific to the desired application. The resultant brush 203 is of a diameter, at its widest end, of about 7 to 8 mm. The bristles of the brush 203 are substantially rectilinear.

Lors de l'étape suivante 204, la brosse 203 est immergée pendant environ 8 secondes dans de l'eau à 100° C.In the next step 204, the brush 203 is immersed for about 8 seconds in water at 100 ° C.

Il en résulte une conformation du matériau polymérique, laquelle conformation cause une courbure sensible des fibres dont le rayon moyen est de l'ordre de 3 à 10 mm.This results in a conformation of the polymeric material, which conformation causes a substantial curvature of the fibers whose average radius is of the order of 3 to 10 mm.

La brosse 1, issue du procédé qui vient d'être décrit, présente des spires qui sont très peu visibles, du fait de l'effet de fouillis généré par les courbures d'orientations aléatoires de ses poils 2.The brush 1, resulting from the process just described, has turns that are very little visible, because of the clutter effect generated by the random orientation curvatures of its bristles 2.

Selon un mode de réalisation particulier, les poils sont de section circulaire. Leur diamètre est de l'ordre de 13/100eme de mm. Ils sont réalisés en polyamide 6.According to a particular embodiment, the bristles are of circular section. Their diameter is of the order of 13/100 th of mm. They are made of polyamide 6.

La brosse comprend 23 à 25 poils par spire.The brush includes 23 to 25 bristles per turn.

Une section transversale de la brosse 1 perpendiculairement à l'axe X est, comme illustré à la figure 3A, de forme circulaire.A cross section of the brush 1 perpendicular to the X axis is, as shown in Figure 3A, circular in shape.

Selon une variante illustrée à la figure 3B, la section de la brosse 1 est de section transversale carrée.According to a variant illustrated in Figure 3B, the section of the brush 1 is of square cross section.

Selon une autre variante illustrée à la figure 3C, la section de la brosse 1 est de forme triangulaire.According to another variant illustrated in Figure 3C, the section of the brush 1 is of triangular shape.

La section transversale des poils 2 peut être de différentes formes.The cross section of the bristles 2 may be of different shapes.

A la figure 4A, les poils 2 sont pleins et de section circulaire.In FIG. 4A, the bristles 2 are solid and of circular section.

A la figure 4B, les poils 2 sont de section en forme de trèfle à quatre feuilles.In Figure 4B, the bristles 2 are of four-leaf clover-shaped section.

A la figure 4C, les poils 2 sont de section triangulaire.In Figure 4C, the bristles 2 are of triangular section.

A la figure 4D, les poils 2 sont de section en forme de grain de riz.In Figure 4D, the bristles 2 are of rice-grain section.

A la figure 4E, les poils 2 sont creux et de section annulaire.In Figure 4E, the bristles 2 are hollow and of annular section.

A la figure 4F, les poils 2 sont de section en forme de C.In FIG. 4F, the bristles 2 are of C-shaped section.

La brosse 1 peut comporter des poils 2 d'un seul type de section, ou des poils de différentes sections, en mélange.The brush 1 may comprise bristles 2 of a single type of section, or bristles of different sections, in a mixture.

Dans la variante de la figure 5, seule la partie de la brosse 1 située d'un même côté de l'âme torsadée 3 à fait l'objet du traitement thermique de l'étape 204 de la figure 11.In the variant of Figure 5, only the portion of the brush 1 located on the same side of the twisted core 3 is the subject of the heat treatment of step 204 of Figure 11.

Il en résulte une brosse 1 qui, sur une portion 5 correspondant à 180° autour de l'âme torsadée 3 présente des portions de poils rectilignes, et qui sur le reste 6, présente des portions de poils courbes 2. Les portions 5 et 6 s'étendent chacune sur toute la longueur de la brosse 1This results in a brush 1 which, on a portion 5 corresponding to 180 ° around the twisted core 3 has portions of straight bristles, and which on the rest 6, has portions of curved bristles 2. The portions 5 and 6 each extend over the entire length of the brush 1

La portion 5 est utilisée pour l'application du produit sur les cils. La portion 6 est utilisée pour la séparation des cils.Portion 5 is used for the application of the product on the eyelashes. Portion 6 is used for lash separation.

Dans la variante de la figure 6, seule la moitié avant de la brosse 1, située à l'opposé de la tige 4, à fait l'objet du traitement thermique de l'étape 204 de la figure 11.In the variant of FIG. 6, only the front half of the brush 1, located opposite the rod 4, has been subjected to the heat treatment of the step 204 of FIG. 11.

Il en résulte une brosse 1 qui sur une première portion axiale 5, s'étendant sur sensiblement la moitié de la longueur de la brosse 1, présente des poils 2 rectilignes. Sur l'autre moitié axiale 6, les poils 2 sont courbes.This results in a brush 1 which on a first axial portion 5, extending over substantially half the length of the brush 1, has straight bristles 2. On the other half axial 6, the bristles 2 are curved.

Comme pour le mode de réalisation précédent, la portion 5 est utilisée pour l'application du produit sur les cils. La portion 6 est utilisée pour la séparation des cils.As for the previous embodiment, the portion 5 is used for the application of the product on the eyelashes. Portion 6 is used for lash separation.

La brosse 1 selon la variante de la figure 7 se distingue de la brosse selon la figure 2 en ce que l'âme torsadée 3 est courbe, la courbure correspondant sensiblement à la courbure de la ligne d'implantation des cils sur la paupière.The brush 1 according to the variant of Figure 7 differs from the brush according to Figure 2 in that the twisted core 3 is curved, the curvature corresponding substantially to the curvature of the eyelash implantation line on the eyelid.

La brosse 1 selon la variante de la figure 8 se distingue de la brosse selon la figure 2 en ce qu'elle est du type "brosse droite", les spires de l'âme torsadée 3 montant de la droite vers la gauche lorsque la brosse 1 est vue de face en position verticale.The brush 1 according to the variant of FIG. 8 differs from the brush according to FIG. 2 in that it is of the "straight brush" type, the turns of the twisted core 3 rising from the right to the left when the brush 1 is seen from the front in vertical position.

A nouveau, on obtient un maquillage différent du maquillage obtenu avec la brosse de la figure 2.Again, a makeup different from the makeup obtained with the brush of FIG. 2 is obtained.

Dans le mode de réalisation de la figure 9, le dispositif d'application 81 est configuré sous forme d'un pinceau destiné à l'application de vernis sur les ongles. Il comprend une touffe de poils 82 agrafée au bout d'une tige 83 d'axe X. Les poils 82 sont orientés de façon sensiblement parallèle à l'axe X (angle relativement à l'axe X inférieur à 45°).In the embodiment of FIG. 9, the application device 81 is configured in the form of a brush intended for the application of varnish on the nails. It comprises a tuft of bristles 82 stapled at the end of a rod 83 of axis X. The bristles 82 are oriented substantially parallel to the X axis (angle relative to the X axis less than 45 °).

L'extrémité de la tige 83 opposée à la touffe de poils 82 est reliée à un élément 84 formant à la fois organe de préhension pour le pinceau 81, et élément d'obturation pour le récipient auquel est associé le pinceau.The end of the rod 83 opposite the tuft of bristles 82 is connected to an element 84 forming both a gripping member for the brush 81, and a closure element for the container with which the brush is associated.

La courbure des poils 82 du pinceau 81 est obtenue de la même manière que pour la courbure des poils des brosses à mascara des figures précédentes, simplement en immergeant le pinceau 81, pendant une dizaine de secondes, dans de l'eau à 100 °C.The curvature of the bristles 82 of the brush 81 is obtained in the same manner as for the curvature of the bristles of the mascara brushes of the preceding figures, simply by immersing the brush 81 for about 10 seconds in water at 100 ° C. .

En raison de la courbure des poils 82, la rétention en produit du pinceau est plus importante que dans le cas de poils rectilignes. L'autonomie du pinceau s'en trouve améliorée d'autant.Due to the curvature of the bristles 82, the product retention of the brush is greater than in the case of straight bristles. The autonomy of the brush is improved accordingly.

A la figure 10, est représenté un ensemble de conditionnement et d'application 100, équipé d'un dispositif d'application 1 du type de ceux décrits précédemment en référence aux figures 2 à 8. L'ensemble 100 comporte un récipient 101 contenant une réserve de produit cosmétique tel que du mascara et un applicateur 110. L'applicateur 110 comprend un dispositif d'application 1, du type brosse torsadée, fixé à une extrémité d'une tige 4 d'axe X. L'autre extrémité de la tige 4 est solidaire d'un élément de préhension 7 qui constitue également un capuchon de fermeture du récipient 101. Le récipient 101 comporte un organe d'essorage 106 constitué ici par un manchon cylindrique dont une extrémité se termine par une lèvre annulaire, souple, 107. En position montée de l'applicateur 110 sur le récipient 101, le dispositif d'application 1 se trouve dans son intégralité entre la lèvre d'essorage 107 et le fond du récipient. D'autres types d'organes d'essorage peuvent être utilisés, par exemple un bloc de mousse à cellules ouvertes ou semi ouvertes, traversé axialement par une fente ou un passage, dont les bords qui la délimitent sont sensiblement jointifs en l'absence de contrainte.FIG. 10 shows a packaging and application assembly 100, equipped with an application device 1 of the type described above with reference to FIGS. 2 to 8. The assembly 100 comprises a container 101 containing a stock of cosmetic product such as mascara and an applicator 110. The applicator 110 comprises an application device 1, of twisted brush type, attached to one end of a rod 4 of axis X. The other end of the rod 4 is secured to a gripping element 7 which also constitutes a closing cap of the container 101. The container 101 comprises a wiper member 106 constituted in this case by a cylindrical sleeve whose end ends with a flexible, annular lip, 107. In the mounted position of the applicator 110 on the container 101, the application device 1 is in its entirety between the wiper lip 107 and the bottom of the container. Other types of wiper members may be used, for example an open or semi open cell foam block, traversed axially by a slot or a passage, the edges of which delimit it are substantially contiguous in the absence of constraint.

En vue d'utiliser l'applicateur, l'utilisatrice dévisse le capuchon formé par l'organe de préhension 7, et extrait l'applicateur 110 du récipient 101. Ce faisant, le dispositif d'application 1 est amené à passer au travers de l'organe d'essorage 106, de manière à doser la quantité de produit répartie sur les dents ou sur les poils. Le mouvement d'extraction de l'applicateur est de direction sensiblement longitudinale à l'axe X. Après usage, l'utilisatrice remet l'applicateur dans le récipient, en faisant à nouveau passer le dispositif d'application 1 au travers de l'organe d'essorage 106.In order to use the applicator, the user unscrews the cap formed by the gripping member 7, and extracts the applicator 110 from the container 101. application device 1 is passed through the wiper member 106, so as to dose the amount of product distributed on the teeth or on the bristles. The extraction movement of the applicator is of substantially longitudinal direction to the axis X. After use, the user puts the applicator back into the container, again passing the application device 1 through the wiper member 106.

Dans la description détaillée qui précède, il a été fait référence à des modes de réalisation préférés de l'invention. Il est évident que des variantes peuvent y être apportées sans s'écarter de l'esprit de l'invention telle que revendiquée ci-après.In the foregoing detailed description, reference has been made to preferred embodiments of the invention. It is obvious that variations may be made without departing from the spirit of the invention as claimed hereinafter.

Claims (30)

  1. Device (1, 81) for applying a product, especially a make-up and/or care product, comprising an arrangement of polymer fibres (2, 82) at at least one free end, said fibres being mounted fixedly on a support (3, 83), characterized in that at least some of said fibres have at least one curved portion which:
    i) extends continuously from the support as far as a (or their) free end, and
    ii) has an average radius of curvature of less than 45 mm,
    said curved portions being oriented randomly with respect to one another.
  2. Device according to Claim 1, characterized in that said curved portions have a substantially constant curvature from the support to the corresponding free end.
  3. Device (1, 81) according to Claim 1 or 2, characterized in that the average radius of curvature of said curved portions is between 2 mm and 40 mm.
  4. Device (1, 81) according to Claim 3, characterized in that the average radius of curvature of said curved portions is between 2 and 30 mm.
  5. Device (1, 81) according to Claim 4, characterized in that the average radius of curvature of said curved portions is between 3 and 20 mm, preferably between 3 mm and 10 mm.
  6. Device (1, 81) according to any one of Claims 1 to 5, characterized in that said fibres are made of a thermoplastic, in particular a polyamide, or a thermoplastic elastomer.
  7. Device (1, 81) according to any one of the preceding claims, characterized in that the diameter of the fibres is between 6/100 mm and 35/100 mm, preferably between 10/100 mm and 25/100 mm.
  8. Device (1, 81) according to any one of the preceding claims, characterized in that it comprises a first group (6) of curved portions, and a second group (5) of fibres or portions of fibres which are substantially straight.
  9. Device (1, 81) according to any one of Claims 1 to 7, characterized in that it comprises a first group of curved portions having a first average radius of curvature and a second group of curved portions having a second average radius of curvature that differs from the first.
  10. Device (1, 81) according to Claim 8 or 9, characterized in that the first and second groups of curved portions are made using fibres made of different materials, in particular having different glass transition temperatures.
  11. Device (1, 81) according to Claim 8 or 9, characterized in that the first and second groups of curved portions are made using fibres made of identical materials.
  12. Device (1, 81) according to any one of Claims 1 to 11, characterized in that the fibres (2) are oriented transversely to a longitudinal axis X of the support.
  13. Device (1, 81) according to Claim 12, characterized in that the support consists of a twisted core (3), formed from two strands, in particular of iron wire, twisted together, the fibres (2) being held fixedly between the two twisted strands and extending radially with respect to the twisted core (3), the device being designed for applying product to keratin fibres, especially the eyelashes or eyebrows.
  14. Device (1, 81) according to Claim 13, characterized in that the fibres (2) are arranged helically, the number of fibres per turn being between 5 and 80, preferably between 10 and 45.
  15. Device (1, 81) according to Claim 13 or 14, characterized in that a cross section of the applicator device (1) is circular, or polygonal, especially triangular, square or pentagonal.
  16. Device (1, 81) according to any one of Claims 13 to 15, characterized in that the twisted core (3) is straight.
  17. Device (1, 81) according to any one of Claims 13 to 15, characterized in that the twisted core (3) is curved.
  18. Device (1, 81) according to any one of Claims 13 to 17, characterized in that the twisted core (3) has a plurality of turns rising from left to right when the device (1) is seen from the front in the vertical position.
  19. Device (1, 81) according to any one of Claims 13 to 17, characterized in that the twisted core (3) has a plurality of turns rising from right to left when the device (1) is seen from the front in the vertical position.
  20. Device (1, 81) according to any one of Claims 13 to 19 and according to any one of Claims 8 to 11, characterized in that the curved portions of the first group are mixed on the support with the curved portions of the second group.
  21. Device (1, 81) according to any one of Claims 13 to 19 and according to any one of Claims 8 to 11, characterized in that the first and second groups (5, 6) are separate.
  22. Device (1, 81) according to Claim 21, characterized in that the first and second groups (5, 6) are offset along a longitudinal axis of the support.
  23. Device (1, 81) according to Claim 21, characterized in that the first and second groups (5, 6) are offset angularly around the twisted core.
  24. Device (1, 81) according to any one of Claims 1 to 11, characterized in that the fibres (82) are oriented substantially parallel to a longitudinal axis X of the support.
  25. Method of manufacturing a device (1, 81) for applying a product, especially a make-up and/or care product, comprising the following steps:
    i) arranging a plurality of polymer fibres (2, 82) fixedly on a support (3, 83), and
    ii) after fixing the fibres to the support, exposing at least some of the fibres (2, 82) to a temperature above the glass transition temperature of the polymer of which they are made, for a time such that:
    a) said fibres (2, 82) have at least one curved portion and that
    b) the length of said fibres (2, 82) is substantially unchanged.
  26. Method according to Claim 25, characterized in that said fibres (2, 82) are heated by convection, in particular by immersion in a hot liquid, or by contact with hot air, or by radiation, in particular infrared radiation.
  27. Method according to Claim 26, characterized in that the fibres are heated by immersing them in hot water at around 100°C.
  28. Method according to Claim 27, characterized in that the fibres (2, 82) are immersed in said liquid for a time of between 4 and 25 seconds, preferably between 7 and 15 seconds.
  29. Assembly (100) for packaging and applying a product, especially a cosmetic product, comprising:
    a) a reservoir (101) containing the product to be applied; and
    b) an applicator device (1, 81) according to any one of Claims 1 to 24.
  30. Assembly (100) according to Claim 29, characterized in that the product is a make-up and/or care product for keratin fibres, especially the eyelashes or eyebrows.
EP03291388A 2002-06-20 2003-06-11 Product applicator, especially for cosmetics, and method of manufacturing such an applicator Revoked EP1374723B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0207640 2002-06-20
FR0207640A FR2841108B1 (en) 2002-06-20 2002-06-20 PRODUCT APPLICATOR, ESPECIALLY COSMETIC, AND METHOD FOR MANUFACTURING SUCH AN APPLICATOR

Publications (2)

Publication Number Publication Date
EP1374723A1 EP1374723A1 (en) 2004-01-02
EP1374723B1 true EP1374723B1 (en) 2007-10-03

Family

ID=29717064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03291388A Revoked EP1374723B1 (en) 2002-06-20 2003-06-11 Product applicator, especially for cosmetics, and method of manufacturing such an applicator

Country Status (8)

Country Link
EP (1) EP1374723B1 (en)
JP (1) JP4296394B2 (en)
CN (1) CN1235530C (en)
AT (1) ATE374543T1 (en)
BR (1) BR0302237A (en)
DE (1) DE60316626T2 (en)
ES (1) ES2294249T3 (en)
FR (1) FR2841108B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2853528B1 (en) * 2003-04-11 2008-08-29 Oreal COSMETIC COMPOSITION COMPRISING AN AMORPHOUS FILMOGENIC POLYMER AND HAVING A PARTICULAR THERMAL PROFILE
FR2887130B1 (en) * 2005-06-15 2007-08-24 Oreal BRUSH AND DEVICE FOR PACKAGING AND APPLICATION COMPRISING SUCH A BRUSH.
US7996947B2 (en) 2005-06-15 2011-08-16 L'oreal Brush and a packaging and applicator device including such a brush
JP2009201818A (en) * 2008-02-28 2009-09-10 Tokyo Parts Kk Liquid applicator
US20090276973A1 (en) * 2008-05-06 2009-11-12 Herve Bouix Cosmetic Applicator Assembly
JP5635630B2 (en) * 2010-02-13 2014-12-03 ザ プロクター アンド ギャンブルカンパニー Containers for applying personal care products
US8308383B2 (en) * 2010-03-26 2012-11-13 Elc Management, Llc Heated mascara applicator and suitable compositions
CN102669930A (en) * 2011-03-17 2012-09-19 苏州洽兴塑胶有限公司 Novel lash curler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022890A1 (en) 1990-07-18 1992-01-23 Geka Brush Georg Karl Gmbh BRUSH, ESPECIALLY MASCARA BRUSH
FR2668905B1 (en) 1990-11-13 1993-02-12 Oreal BRUSH FOR THE APPLICATION OF A COSMETIC PRODUCT IN PARTICULAR TO EYELASHES OR HAIR, AND METHOD FOR OBTAINING SUCH A BRUSH.
FR2687055B1 (en) * 1992-02-11 1994-04-29 Oreal BRUSH FOR APPLYING NAIL VARNISH OR THE LIKE.
FR2717057B1 (en) * 1994-03-14 1996-04-12 Oreal Nail varnish brush and set of nail varnish application provided with such a brush.
DE19615098A1 (en) * 1996-04-17 1997-10-23 Coronet Werke Gmbh Brush for gum massage and tooth cleaning and method for producing the bristles of such a brush

Also Published As

Publication number Publication date
BR0302237A (en) 2004-09-08
CN1473528A (en) 2004-02-11
DE60316626T2 (en) 2008-07-17
DE60316626D1 (en) 2007-11-15
ES2294249T3 (en) 2008-04-01
CN1235530C (en) 2006-01-11
FR2841108A1 (en) 2003-12-26
EP1374723A1 (en) 2004-01-02
JP4296394B2 (en) 2009-07-15
JP2004024871A (en) 2004-01-29
ATE374543T1 (en) 2007-10-15
FR2841108B1 (en) 2004-07-30

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