FR2841108A1 - PRODUCT APPLICATOR, ESPECIALLY COSMETIC, AND METHOD FOR MANUFACTURING SUCH AN APPLICATOR - Google Patents

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

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  The present invention relates to a device for the application of a product, in particular cosmetic, in particular of makeup and vein. The product can be applied to the skin, nails or keratin fibers, in particular the hair, the eyelashes or the eyebrows. In the field of make-up, cosmeticians are constantly looking for

new effects.

  This is true in particular in the field of mascaras, where one seeks to obtain make-ups which can be filling, natural, curling, lengthening, or which result from a mixture between these different basic characteristics. The search for new application devices can also be guided by the appearance of new makeup compositions, which, due to their

  rheology, cannot be applied with conventional applicators.

  Thus, the patent literature is teeming with patents describing devices whose object is to produce new makeup effects or to allow the application of

  compositions having particular rheologies.

  By way of example, the devices described in these patents are distinguished from one another by the density eVou the shape of their application elements (generally fibers), by their profile, longitudinal eVou transverse, by nature of the material constituting the support for 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 that a constituent part (by

example, the wringer).

  Thus, more specifically, patent application FR-A-2 668 905 describes a process for obtaining a mascara brush consisting in, after twisting the brush and mowing according to the desired profile, in heating the tips of the fibers so

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  melt them, and thus create small bulges at the end of the fibers in the form of balls, resulting from the retraction of the polymeric material. After a

  such treatment, the fibers remain substantially straight.

  According to another example, US Pat. No. 5,161,554 describes a mascara brush of the twisted brush type, and the wind fibers of which vary in section along their longitudinal axis. The fibers can be zig-zag or wavy. This results in fibers having an alternation of curvatures in one see, then in the other, with an evolving radius of curvature between a maximum radius and a radius.

  minimum at each inversion of curvature.

  In this document, a number of operations are described, in particular during the extrusion of the fibers, or after extrusion, so as to give them the

profile wishes.

  After treatment, in a conventional manner, the wind fibers arranged in the form of a sheet introduced between the two strands of a U-shaped wire. These latter then wind twisted relative to each other, so as to configure the fibers

  in the form of a helical arrangement with several turns.

  From experience, we can see that: i) when the deformations are generated during the fiber extrusion process, due to the extrusion process itself, they necessarily have a large minimum radius of curvature; and ii) when the deformations result from a treatment after extrusion 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 iron wire. U. and in order to twist the two strands of the

  iron, would be most problematic.

  It is also known to make mascara brushes by molding. The mold is designed so that the free end of the application elements, which, generally in a straight line, ends in a fork-shaped or hook-shaped portion. Due to the fact that these end portions are obtained by

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  molding, their relative wind directions predetermined. The results in terms of make-up are disappointing. In addition, it is necessary to have a mold per

type of makeup looking.

  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. From such a purely mechanical treatment, portions of fibers of curved shape may result. These curved portions are however strictly localized at the ends of the fibers. In addition, the radii of curvature obtained hardly descend in

below 50 mm.

  With such radii of curvature, the effects in terms of make-up, wind

barely noticeable.

  Also, is it one of the objects of the present application to realize an application device, in particular for a makeup and / or vein product, resolving

  all or part of the problems discussed with reference to known devices.

  It is in particular an object of the invention to provide a device for applying a makeup and / or vein product, constituting an alternative solution with a view to obtaining certain makeup effects, or offering the possibility to obtain make-up different from the make-up obtained with conventional devices. It is another object of the invention to produce an economic device to be produced. It is yet another object of the invention to carry out a method of manufacturing an applicator, in particular for a vein and / or makeup product, and which

  is simple and economical to implement on an industrial tool.

  Still other objects will appear in the detailed description which follows.

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  According to the invention, these objects are achieved by making a device for the application of a product, in particular make-up and / or vein, comprising an arrangement of polymer fibers having at least one free end, said fibers being fixedly mounted on a support and having, at least for some, at least a curved portion which: i) extends continuously from the support to a (or their) free end, and ii) is of mean radius of curvature less than 45 mm , said curved portions being oriented relative to one another by

randomly.

  By "continuously" means without reversing the direction of the curvature between the

support and extremity ilbre.

  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 which it is desired to bend, and below the melting temperature said audit

  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 retraction of the material, apse, as described in patent application FR-A-2,668 905 mentioned above, to cause a significant shortening of the fibers and to modify the

  cross section, in particular, at the end.

  Above the limit value of approximately 45 mm, the effees, in particular in terms of makeup effects, may, depending in particular on the rheology of the product a

apply, be insufficient judges.

  The significant curvature of the fibers makes it possible, even in the hypothesis where the density of fibers, in particular by turns in the case of a mascara brush of the twisted brush type, is important, to substantially reduce the spaces

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  between two successive turns, and create a clutter effect, thus avoiding the

makeup is not done in packs.

  In reality, 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 pass from of a most natural make-up has a most filling make-up, and / or to obtain

  more or less elongation and / or bending.

  Because of this significant curvature, it is also possible, in the case of an applicator intended for make-up, to obtain new make-ups, relative to the make-ups obtained with conventional applicators, and

  this, has identical makeup compositions.

  In the case of a nail varnish applicator or a nail vein composition, configured in the form of a brush, the curvature of the fibers contributes to space them apart relative to each other, thus increasing the quantity of product which can be retained between the fibers of the brush. The autonomy of the brush is. of

this fact, much better.

  In addition, due to this particular configuration of the tuft (s) of fibers

  with such a brush, marble effects can be obtained on the nail.

  Preferably, said fibers have a substantially constant curvature from the support to the corresponding free end. By "substantially constant" is meant a variation in radius of curvature of at most 15% around a value

  average, and preferably at most 10% around said average value.

  According to the invention, the application device can also be configured in the form of an arrangement of polls substantially parallel to each other, and extending, in the manner of a toothbrush, perpendicular to an axis of said support. Such applicators are generally intended to be used in combination with a product packaged in the form of a solid bread,

moisten before use.

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  The mean 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. Advantageously, said wind fibers made of a plastic material, in particular of polyamide, or of a thermoplastic elastomer. The material

  thermoplastic can be 100% amorphous or semi-crystalline.

  By way of examples, mention may be made of polyamides 6 such as those sold

under the brand Tynex @.

  The diameter of the fibers can be between 6 / 100th of a mm and 35 / 100th of

  mm, and preferably between 1 0 / 100th of mm and 25/1 OOeme of mm.

  According to a particular embodiment, the application device comprises

  fibers or portions of sensitive fibers are straight.

  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 mean 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 formed from materials.

  different, in particular having different glass transition temperatures.

  However, such differences can also be obtained with fibers formed from identical materials. In this case, several possibilities exist: i) the heat treatment conditions to which the curved portions of the two different wind groups are subjected, in terms of temperature or heating time; or

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  ii) the curved portions of the first group are portions of fibers whose diameter and / or shape are diflerent from the diameter and / or shape of fibers of which

  wind from the curved portions of the second group.

  Thus, one can use, alone or in mixtures, full or hollow polls, circular, triangular, elongated, C-shaped, or four-leaf clover

  leaves (quadrilobe). Still other forms can be used.

  The different groups of curved portions can, when they are mixed with each other, participate in obtaining results of particular application, in particular when they are doing make-up. They can also, when they are separated from each other, be used for different areas of the area to be treated. Advantageously, the support consists of a twisted core, formed from two strands, in particular of wire, twisted one relative to the other, the fibers being fixedly held between the two twisted strands and extending radially relatively to the twisted core, the device being intended for product application

  on keratin fibers, in particular the eyelashes or the eyebrows.

  With an application device according to this preferential embodiment, each fiber, held substantially in its middle by the twisted core, comprises two portions each extending from the support to a corresponding free end. On such an applicator, the following may be present: i) fibers of which the two wind curved portions, with identical or different curvatures; ii) fibers of which one portion is curved and the other portion of which is straight; and, optionally iii) mixed with fibers of one and / or the other of categories i) and ii),

  fibers, the two portions of which are straight.

  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 can be more or less perceptible,

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  or even completely imperceptible, on the surface of the applicator, depending on the degree

fiber curvature.

  The cross section of the application device can be circular, or polygonal, in particular triangular, square, or pentagonal. Other forms

still can be considered.

  The twisted core can be straight or curved.

  The twisted core has a plurality of turns which can rise from left to right when the brush is viewed from the front in a vertical position. In this case

brush is called "left".

  Alternatively, the twisted core has a plurality of turns rising from right to left when the brush is viewed from the front in a vertical position. In

  in this case, the brush is qualified as "straight".

  - In the case of an applicator with several groups of curved portions of different curvatures, these backs can be mixed with each

others- on the support.

  Alternatively, the different groups of curved portions can be implanted

  in places separate from the support.

  Thus, the first and second groups of curved portions can be offset on

  along a longitudinal axis of the support.

  Alternatively, they wind angularly around the twisted web.

  According to another aspect of the invention, there is also carried out a method of manufacturing a device for the application of a product, in particular make-up and / or vein, comprising the following steps: i) fixedly arranging a plurality of polymeric fibers on a support, and

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  ii) after fixing the fibers to the support, exposing at least a portion of the fibers to a temperature higher than the glass transition temperature of the polymeric material which constitutes them, for a period such that: a) said fibers have at least one curved portion; and that b) the length of said fibers is substantially unchanged. In the case of a semi-crystalline material, the fibers are heated to a temperature substantially lower than the melting temperature of the material which

ies constitutes.

  The said fibers can be heated by convection, in particular by immersion in a heated liquid, or by contacting with hot air, or

  by radiation, especially infrared.

  Preferably, the heating is carried out by immersion of the fibers in water heated to approximately 100 C. A similar temperature has proved satisfactory for polyamide 6 fibers whose glass transition temperature is included

  between 50 C and 60 C, and whose melting temperature is around 1 85 C.

  The fibers can be immersed in said liquid for a period ranging from

  4 to 25 seconds, and preferably 7 to 15 seconds.

  By way of indication only, for a twisted brush comprising polyamide 6 fibers whose diameter is 13 / 100th of mm, the maximum curvature is

  obtained after 8 seconds of heating in water at 100 C.

  According to yet another aspect, the invention relates to an assembly for packaging and applying a product, in particular cosmetic, comprising: a) a reservoir containing the product to be applied; and

  b) an application device according to the invention.

  The packaging and application assembly may further comprise a wringer intended to be passed through by the application device, at least during

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  its extraction from the container, so as to closer the quantity of product present on,

and between, the fibers.

  The invention consists, apart from the arrangements set out 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 an applicator of the twisted brush type, in accordance with the technique prior to the present invention; - Figure 2 shows schematically an application device according to a first embodiment of the invention; - Figures 3A-3C illustrate fa, schematically different cross sections of an application device according to Figure 2; - Figures 4A-4F illustrate different cross sections of fibers which can be used in an application device according to the invention; - Figure 5 shows schematically an application device according to a second embodiment of the invention; - Figure 6 shows schematically an application device according to a third embodiment of [the invention; - Figure 7 shows schematically an application device according to a fourth embodiment of the invention; - Figure 8 shows schematically an application device according to a fifth embodiment of [the invention; - Figure 9 shows schematically an application device according to a sixth embodiment of the invention; - Figure 10 shows schematically a packaging and application assembly using an application device according to the invention; and - Figure 11 shows schematically the different stages of the

  manufacturing method according to an embodiment of the invention.

  FIG. 1 illustrates a conventional brush 50 of the brush type, such

  commonly used for making up eyelashes or eyebrows.

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  The brush 50 comprises a twisted core 51 obtained from a wire folded in a U and between the branches of which, prior to the twisting movement, a sheet of polls 52 is introduced. In response to the twisting movement, the polls 52 wind entrainées in a helical configuration formed by a succession of more or less spread turns. The polls 52 extend radially to the support and wind substantially straight or at least have a radius of curvature

large (greater than 60 mm).

  An unstitched 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 an element (not shown) forming both a gripping member for the brush

  , and closure element for the container with which the brush is associated.

  Figure 2 shows a brush 1 of the type of that of Figure 1, but conforms

to the invention.

  According to this embodiment, and in the same way as that 50 of FIG. 1, the brush 1 is of the "left brush" type, the turns of the twisted core 3 rising from the left to the right when the brush 1 is front view in vertical position. In the same way as for the brush of FIG. 1, a non-poached part of the twisted core 3 is fixed to the end of a rod 4. The twisted core 3 of the brush

  is straight and extends along an axis X correspond to the axis of the rod 4.

  Polls 2 of the brush, unlike polls 52 of the brush in the figure

  previous, wind curved over their entire length.

  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 commercial reference H562 by the Company

@ HAWSER.

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  Although the curvatures of the fibers relative to each other are of random orientation, it has been observed that, in an example of preferential implementation, the heat treatment to which the fibers are subjected causes a curvature of these backs which is substantially constant from support up to their free end (s). FIG. 11, to which reference is now made, illustrates diagrammatically the main stages in the manufacture of a brush 1 of the type of that of FIG. 2. In a first stage, 200, the polls are introduced, in the form of a tablecloth, between the two strands of a wire, which wind then twists. The result is one

  cylindrical pin 201 of approximately 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 resulting brush 203 has a diameter, at its widest end, of about 7 to 8 mm. The polls of the

  brush 203 wind substantially straight.

  In the next step 204, the brush 203 is immersed for about 8 seconds in water at 100 ° C. 11 results in a conformation of the polymeric material, which conformation causes a substantial curvature of the fibers whose average radius is 1 from 3 to 10mm. The brush 1, resulting from the process which has just been described, has turns which are hardly visible, due to the clutter effect generated by the curvatures of orientations

random polls 2.

  According to a particular embodiment, the polls wind of circular section. Their

  diameter is of the order of i 3/1 OOeme of mm. They are made of polyamide 6.

  The brush includes 23 to 25 polls per turn.

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  A cross section of the brush 1 perpendicular to the axis X is. as

  illustrated in FIG. 3A, of circular shape.

  According to a variant illustrated in FIG. 3B, the section of the brush 1 is of section

square cross.

  According to another variant illustrated in FIG. 3C, the section of the brush 1 is of

triangular shape.

  The cross section of polls 2 can be of different shapes.

  In FIG. 4A, the polls 2 are full and of circular cross section.

  In FIG. 4B, the polls 2 have a cross section in the shape of a four-leaf clover.

  In FIG. 4C, the polls 2 wind of triangular section.

  In FIG. 4D, the polls 2 cross section in the shape of a grain of rice.

  In FIG. 4E, the polls 2 hollow wind and of annular section.

  In FIG. 4F, the polls 2 have a C-shaped cross-section. The brush 1 may include polls 2 of a single type of section, or polls of

different sections, mixed.

  In the variant of FIG. 5, only the part of the brush 1 situated on the same side of the twisted core 3 was subjected to the heat treatment of step 204 of the

figure 11.

  11 results in a brush 1 which, on a portion 5 corresponds to 180 around the twisted core 3 presents portions of straight polls, and which on the rest 6,

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  has portions of curved polls 2. The portions 5 and 6 each extend over the entire length of the brush 1 The portion 5 is used for the application of the product to the skies. Portion 6 is used for the separation of the eyelashes. In the variant of FIG. 6, only the front half of the brush 1, located opposite the rod 4, was subjected to the heat treatment of step 204 of the

figure 1 1.

  11 results in a brush 1 which on a first axial portion 5, extending over substantially half the length of the brush 1, has polls 2

  rectilinear. On the other axial half 6, the polls 2 are curved.

  As for the previous embodiment, the portion 5 is used for the application of the product to the eyelashes. The portion 6 is used for the separation of the eyelashes. 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 correspond

  substantially at 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 front view in vertical position. Again, a makeup is obtained which is different from the makeup obtained with the

brush of figure 2.

  In the embodiment of FIG. 9, the application device 81 is

  configure in the form of a brush intended for the application of varnish on the nails.

  It comprises a tuft of polls 82 stapled to the end of a rod 83 of axis X. The polls

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  82 wind oriented substantially parallel to the X axis (angle relatively to

the X axis less than 45).

  The end of the rod 83 opposite the tuft of polls 82 is connected to an element 84 forming both a gripping member for the brush 81 and a sealing element

  for the container with which the brush is associated.

  The curvature of the polls 82 of the brush 81 is obtained in the same way as for the curvature of the polls of the mascara brushes of the preceding figures, simply by immersing the brush 81, for ten seconds, in

water at 100 C.

  Due to the curvature of the polls 82, the retention of product in the brush is greater than in the case of straight polls. The autonomy of the brush

found improved by that much.

  In FIG. 10, a packaging and application assembly is represented, equipped with an application device 1 of the type of those described above with reference to FIGS. 2 to 8. The assembly 100 comprises a container 101 containing a reserve of cosmetic product such as mascara and an applicator 110. The applicator 110 comprises an application device 1, of the twisted brush type, fixed at 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 closure cap for the container 101. The container 101 comprises a wiping member 106 constituted here by a cylindrical sleeve, one end of which ends in a flexible annular lip, 107 In the mounted position of the applicator 110 on the container 101, the application device 1 is located in its entirety between the wiping lever 107 and the bottom of the container. Other types of wiping members can be used, for example a block of foam with open or semi-open cells, axially crossed by a slit or a passage, the edges of which

  delimit substantially joined wind in the absence of constraint.

  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. In doing so, the

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  application device l is caused to pass through the wringing member 106, so as to bring closer the quantity of product distributed over the teeth or over the polls. The extraction movement of the applicator is in a direction substantially longitudinal to the X axis. After use, the user puts the applicator back into the container, again passing the application device 1 through

the wringing member 106.

  In the above detailed description, reference has been made to modes of

  preferred realization of the invention. It is obvious that variants can be there

  made without departing from the spirit of the invention as claimed below.

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Claims (27)

  1. - Device (1, 81) for the application of a product, in particular of vein or vein makeup, comprising an arrangement of polymer fibers (2, 82) at at least one free end, said fibers being fixedly mounted on a support (3, 83) and having, at least for some, at least one curved portion which: i) extends continuously from the support to one (or their) free end, and ii) is of average radius of curvature less than 45 mm, said curved portions being oriented relative to one another by; o random handling.   2. - Device according to claim 1 characterized in that said curved wind portions of 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 radius of   mean curvature of said curved portions is between 2 mm and 40 mm.   4. - Device (1, 81) according to claim 3 characterized in that the radius of   mean curvature of said curved portions is between 2 and 30 mm.   5. - Device (1, 81) according to claim 4 characterized in that the mean radius of curvature of said curved portions is between 3 and 20 mm, and preferably between 3 mm and 10 mm.   6. - Device (1, 81) according to any one of claims 1 to 5 characterized in   what said fibers are made of a thermoplastic material, in particular   polyamide, or a thermoplastic elastomer.   o 7. - Device (1, 81) according to any one of the preceding claims   characterized in that the diameter of the fibers is between 6 / 100th of mm and   / 1 OOeme of mm, and preferably between 10/1 OOeme of mm and 25/1 OOeme of mm. 28411 08   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 fibers or portions of fibers that 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 mean radius of curvature, distinct from the first.   10. - Device (1, 81) according to claim 8 or 9 characterized in that the first and second groups of curved wind portions from fibers formed from 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 wind portions from fibers formed of identical materials.   12. - Device (1, 81) according to any one of claims 1 to 1 1   characterized in that the fibers (2) are oriented transversely to an axis longitudinal 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 wire, twisted one relatively to the other, the fibers (2) being fixedly held between the two twisted strands and extending radially relative to the twisted core (3), the device being intended for the application of product to the fibers   keratin, especially the eyelashes or eyebrows.   14. - Device (1, 81) according to claim 13 characterized in that the fibers (2) are arranged in a helical arrangement, the number of fibers per turn   being between 5 and 80, and preferably between 10 and 45. 28411 08   15. - Device (1, 81) according to claim 13 or 14 characterized in that a cross section of the application device (1) is circular, or polygonal,   in particular triangular, square, or pentagon.   16. - Device (1, 81) according to any one of claims 13 to 15   characterized in that the twisted web (3) is straight.   17. - Device (1, 81) according to any one of claims 13 to 15   characterized in that the twisted web (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 the   left to right when the device (1) is seen from the front in a 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 the   right to left when the device (1) is seen from the front in a vertical position.   20. - Device (1, 81) according to any one of claims 13 to 19 and according to   Any of claims 8 to 11 characterized in that the portions   curves of the first group wind in mixture on the support with the portions curves of the second group.   21. - Device (1, 81) according to any one of claims 13 to 19 and according to   Any of claims 8 to 11 characterized in that the first and second groups (5, 6) separate.   22. - Device (1, 81) according to claim 21 characterized in that the first   and second groups (5, 6) wind shifted 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) wind offset angularly around the twisted web. 28411 08   24. - Device (1, 81) according to any one of claims 1 to 11   characterized in that the fibers (82) are oriented substantially parallel to a longitudinal axis X of the support.   25. - Method for manufacturing a device (1, 81) for the application of a product, in particular make-up and / or vein, comprising the following steps: i) fixedly arranging a plurality of polymer fibers (2, 82) on a support (3, 83), and ii) after fixing the fibers to the support, exposing at least a portion of the fibers (2, 82) to a temperature higher than the glass transition temperature of the polymeric material which constitutes them, for a period such as: a) that said fibers (2, 82) have at least one curved portion; and   b) the length of said fibers (2, 82) is substantially unchanged.   26. - Method according to claim 25 characterized in that the heating of said fibers (2, 82) is effected by convection, in particular by immersion in a heated liquid, or by contacting with hot air, or by radiation, especially infrared.   27. - Method according to claim 26 characterized in that the heating is carried out by immersion of the fibers in water heated to about 100 C. 28. - Method according to claim 27 characterized in that the fibers (2, 82) wind immersed in said liquid for a period ranging from 4 to 25 seconds, and preferably 7 to 15 seconds.   29. - Assembly (100) for packaging and applying a product, in particular a cosmetic, comprising: a) a reservoir (101) containing the product to be applied; and b) an application device (1, 81) according to any one of claims 1 to 24. 28411 08   30. - Together (100) Solon la mvendiciDon 29 carsctAdsd an ca qua produ # ash an product da maqulllage cCou da soln das flares kAratiniques, in particular das