EP2303061B1 - Brush for applying a cosmetic composition and having synthetic hairs - Google Patents

Brush for applying a cosmetic composition and having synthetic hairs Download PDF

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Publication number
EP2303061B1
EP2303061B1 EP09784481.5A EP09784481A EP2303061B1 EP 2303061 B1 EP2303061 B1 EP 2303061B1 EP 09784481 A EP09784481 A EP 09784481A EP 2303061 B1 EP2303061 B1 EP 2303061B1
Authority
EP
European Patent Office
Prior art keywords
hairs
section
cross
bristles
group
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.)
Not-in-force
Application number
EP09784481.5A
Other languages
German (de)
French (fr)
Other versions
EP2303061A2 (en
Inventor
Denis Befve
Michel Fontaine
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
Original Assignee
LOreal SA
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Publication date
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Publication of EP2303061A2 publication Critical patent/EP2303061A2/en
Application granted granted Critical
Publication of EP2303061B1 publication Critical patent/EP2303061B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • A46B9/028—Bristle profile, the end of the bristle defining a surface other than a single plane or deviating from a simple geometric form, e.g. cylinder, sphere or cone
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0276—Bristles having pointed ends
    • 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

Definitions

  • Such brushes are used in particular for the collection and application on the skin of powdered cosmetic compositions, compacted or not, such as eyeshadow, loose powders or blushes.
  • the tuft of hair of these brushes is usually made of a natural material, such as natural bristles, or animal hair, such as squirrel hair, wild boar or goat hair.
  • Such a brush is described for example in the document US 2007/0151061 .
  • the manufacture of such brushes is difficult since the bristles of different sections do not distribute easily homogeneously along the entire section of the tuft, when mixing the bristles.
  • the invention aims to provide a brush with synthetic bristles reproducing the properties of a brush with natural bristles whose manufacture is simplified, the hair mixture is easily effected.
  • the brush 10 according to the invention comprises a tuft 12 of bristles 14 retained at one end of a handle 16 by a ferrule 18.
  • the handle 16 is formed of an elongate body, for example a profiled wooden rod.
  • the ferrule 18 is formed of a metal fitting surrounding one end of the handle 16 and enclosing in its seing a link section marked 20 of each of the bristles 14 of the tuft.
  • All the bristle connecting sections 20 are clamped against each other inside the shell, thus ensuring the maintenance and cohesion of the tuft.
  • the connecting sections of the bristles 14 extend beyond the ferrule 18 to each form a free strand 22 terminating at a free end 24 of the hair.
  • the bristles 14 all extend generally parallel to each other along the axis of the handle 16 or they slightly diverge from each other towards their free ends 24, to form a tuft generally frustoconical.
  • the end of the tuft 12 is, for example, curved thus delimiting a convex surface. In a variant, this end is flat.
  • the bristles 14 are synthetic bristles, obtained by extrusion and spinning of a polymer.
  • the bristles are formed of polybutylene terephthalate (PBT) or polyamide.
  • all the bristles 14 have, according to their connecting section 20, the same section. These hairs are advantageously of circular section and then all have the same diameter. Their diameter is advantageously between 50 microns and 150 microns or better, between 70 microns and 110 microns.
  • the tuft 12 comprises at least two groups of bristles having, at their free ends 24, cross sections of different surfaces.
  • a first group has bristles whose cross section at the free end 24 has a lower surface area than the bristles of larger cross section contained in the second group.
  • a first group of bristles 31 is formed of bristles of constant section whereas the second group of bristles 32 is formed of bristles whose pointed end section 34 is tapered, the bristles of the first and second groups having, according to their stretch of link 20, and more broadly over their entire length outside the tapered sections the same section.
  • the bristles 31 and 32 are formed from the same fiber, in particular of circular section and are therefore made of the same material and have a strictly identical section along their connecting section 20.
  • the hairs 31 not tapered at their end 24, a sectional plane extending generally perpendicular to the axis of the hair.
  • the bristles 32 have on their tapered end portion 34 a gradually decreasing section to the end 24.
  • the variation in diameter is effected continuously and preferably linearly along the length of the tapered section 34 from the diameter of the retaining section To a minimum diameter at the end 24.
  • the variation in the cross-sectional area of the tapered end-section bristles, according to the length of the tapered sections 34, is between 1/20 and 1/50, that is to say that the ratio of the surface of the Maximum section of the pile at the surface of the section of the hair at its free end 24 is between 20 and 50. This ratio is preferably between 30 and 40.
  • the diameter of the section of the bristles 32 at the free end 24 is advantageously between 5 microns and 30 microns, better still between 10 microns and 20 microns, and preferably between 12 microns and 17 microns.
  • the length LE of the tapered section 34 is between 0.3 centimeters and 3 centimeters, more preferably between 0.5 centimeters and 1.5 centimeters, and preferably between 0.8 and 1.2 centimeters.
  • the tapered section 34 extends over between 10% and 50% of the total length denoted LL1 of the free strand 22 of the bristles 32, better still between 10% and 40% and preferably between 25% and 35%.
  • This length LL1 of the free strand 22 is between 0.5 centimeters and 7 centimeters, better between 1 centimeter and 5 centimeters, and preferably between 3 and 4 centimeters.
  • the ratio between the number of tapered bristles 31 and the number of tapered bristles 32 is such that the tuft mainly comprises tapered bristles.
  • the tapered hairs preferably represent between 50% and 95% of the total number of hairs of the tuft, better between 70% and 95%, and preferably between 75% and 85%.
  • the tuft has a total number of hairs of between 25,000 and 75,000, for example about 50,000.
  • the tapered section 24 of the bristles 32 is preferably obtained by chemical treatment of a bristle of constant section. This treatment is carried out for example by dipping the only portion to be tapered in an acid bath. The reduction in the diameter of the pile obtained along the tapered section is directly proportional to the residence time of the portion of the pile in the acid bath.
  • the hair is soaked perpendicular to the surface of the acid bath. It is introduced into the bath and out of the bath with a constant speed of movement, leading to a continuous and linear variation of the section of the hair.
  • the tapered hairs have, as illustrated on the Figures 1 and 2 a length of the free strand LL1 of the tapered hair 32 greater than the length LL2 of the free strand of the untapered bristles 31.
  • the free ends of the tapered bristles 32 protrude beyond the free ends of the untapered bristles 31.
  • the difference in length denoted DL between the two groups of bristles 31 and 32 is between 0.1 centimeter and 1 centimeter, better still between 0.2 centimeter and 0.7 centimeter, and preferably between 0.3 centimeter and 0.5 cm or even between 0.3 cm and 0.4 cm.
  • the difference in length of the bristles is between 1% and 20% of the longest hairs, better still between 5% and 15% and preferably between 8% and 12%.
  • the brush may be easily manufactured since it is formed of bristles which, along their connecting section 20, and in particular over a substantial part of their length, have the same section.
  • the bristles of the first group having a constant section and the bristles of the second group having a tapered end are each manufactured separately. Their mixing is then carried out in a vibrating hopper ensuring a homogeneous mixture of the bristles. Since all the hairs have the same length of the same section, rheological mixing is easy and homogeneous.
  • the binding of the bristles mixed by the ferrule at the end of the handle is effected in a manner known per se by compressing the bristles against each other and crimping the ferrule.
  • the tuft of the brush has bristles of constant section and tapered bristles at their free end.
  • the two groups of bristles are tapered at their free end, but the taper rate is different from one group to another, the surfaces of the free end sections of hairs being different from one group to another, while their cross-sectional areas on the connecting section are identical for the two groups of bristles.
  • a brush having the following characteristics is particularly suitable for cosmetic applications.
  • TALC 30.9400 TRI-ISO-CETYLE CITRATE 0.0975
  • NEOPENTANOATE OF ISODECYL DEODORIZED 4.0500 TITANIUM OXIDE 2.0000 YELLOW IRON OXIDE 3.5200 YELLOW BROWN OXIDES (75/25) 2.0400 BLACK IRON OXIDE 0.9000 MICA (CI: 77019) (SIZE: 8 MICRONS) 10.0000 MIXTURE P-HYDROXYBENZOATES OF METHYL, ETHYL, PROPYL, BUTYL ISOBUTYL PHENOXY-2 ETHANOL 0.6000 MICA 20.0000 NYLON POWDER 12 20.0000 POLY DEMETHYLS
  • the sections are advantageously taken transversely to the local axis of the hair at the section.
  • each hair 32 has, over the entire length of the tapered section 34, a cross section relative to the axis of the hair 32 which is of homothetic contour to the contour of the cross section of the hair 32 in the retaining section.
  • the tapered section 34 has an equally circular cross section of diameter D2 less than D1 and decreasing towards the free end 24.

Description

La présente invention concerne un pinceau destiné à l'application d'une composition cosmétique pulvérulente de type comportant :

  • une touffe de poils synthétiques comportant au moins deux groupes de poils présentant, à leurs extrémités libres, des sections de surfaces différentes ; et
  • un manche supportant la touffe de poils depuis un tronçon de liaison des poils.
The present invention relates to a brush for applying a powdery cosmetic composition of the type comprising:
  • a tuft of synthetic bristles having at least two groups of bristles having, at their free ends, sections of different surfaces; and
  • a handle supporting the tuft of hair from a hair connecting section.

De tels pinceaux sont utilisés notamment pour le prélèvement et l'application sur la peau de compositions cosmétiques pulvérulentes, compactées ou non, telles que des fards à paupières, des poudres libres ou encore des fards à joues.Such brushes are used in particular for the collection and application on the skin of powdered cosmetic compositions, compacted or not, such as eyeshadow, loose powders or blushes.

La touffe de poils de ces pinceaux est généralement réalisée en un matériau naturel, tel que des soies naturelles, ou des poils d'animaux, tels que des poils d'écureuil, de sanglier ou de chèvre.The tuft of hair of these brushes is usually made of a natural material, such as natural bristles, or animal hair, such as squirrel hair, wild boar or goat hair.

Le recours à des matériaux naturels pour réaliser les pinceaux augmente considérablement le coût de fabrication du pinceau.The use of natural materials to make the brushes considerably increases the cost of making the brush.

Il est connu d'utiliser des poils synthétiques pour constituer les touffes des pinceaux. Afin de reproduire au mieux les propriétés mécaniques des pinceaux réalisés avec des poils naturels, il est connu de former la touffe de poils d'un mélange de poils synthétiques présentant des sections différentes.It is known to use synthetic bristles to form the tufts of brushes. In order to best reproduce the mechanical properties of brushes made with natural bristles, it is known to form the tuft of bristles of a mixture of synthetic bristles having different sections.

Un tel pinceau est décrit par exemple dans le document US 2007/0151061 . La fabrication de tels pinceaux est malaisée puisque les poils de sections différents ne se répartissent pas facilement de manière homogène suivant toute la section de la touffe, lors du mélange des poils.Such a brush is described for example in the document US 2007/0151061 . The manufacture of such brushes is difficult since the bristles of different sections do not distribute easily homogeneously along the entire section of the tuft, when mixing the bristles.

Un autre pinceau est connu du document US2008/0141479 .Another brush is known from the document US2008 / 0141479 .

Ainsi, l'invention a pour but de permettre de disposer d'un pinceau à poils synthétiques reproduisant au mieux les propriétés d'un pinceau à poils naturels dont la fabrication est simplifiée, le mélange de poils s'effectuant facilement.Thus, the invention aims to provide a brush with synthetic bristles reproducing the properties of a brush with natural bristles whose manufacture is simplified, the hair mixture is easily effected.

A cet effet, l'invention a pour objet un pinceau du type précité, caractérisé en ce que les groupes de poils présentent, en section, une même surface suivant leur tronçon de liaison, ledit pinceau est défini dans la revendication 1 annexée. Suivant des modes particuliers de réalisation, le pinceau comporte une ou plusieurs des caractéristiques suivantes :

  • les poils effilés sont effilés sur une longueur comprise entre 10% et 50% de la longueur du brin libre ;
  • le rapport des surfaces des sections des poils effilés entre les deux extrémités du poil est compris entre 20 et 50 ;
  • les poils dont la surface de la section à l'extrémité libre est la plus petite ont une longueur de brin libre supérieure à celle des poils dont la surface de la section à l'extrémité libre est la plus grande ;
  • les poils dont la surface de la section à l'extrémité libre est la plus petite ont une longueur de brin libre inférieure à celle des poils dont la surface de la section à l'extrémité libre est la plus grande ;
  • les poils des deux groupes ont, suivant leur brin libre, une différence de longueur comprise entre 1% et 20% de la longueur des plus longs poils ;
  • la section des poils suivant leur tronçon de liaison est comprise entre 50 et 150 microns ; et
  • les poils dont la surface de la section à l'extrémité libre est la plus petite représentent de préférence entre 50% et 95% du nombre total de poils de la touffe.
For this purpose, the invention relates to a brush of the aforementioned type, characterized in that the groups of bristles have, in section, the same surface along their connecting section, said brush is defined in claim 1 attached. According to particular embodiments, the brush comprises one or more of the following features:
  • the tapered hairs are tapered for a length of between 10% and 50% of the length of the free strand;
  • the ratio of the surfaces of the sections of tapered bristles between the two ends of the pile is between 20 and 50;
  • the bristles with the smallest cross-sectional area of the free end have a free strand length greater than that of the bristles of which the cross-sectional area at the free end is the largest;
  • the bristles with the smallest cross-sectional area of the free end have a free strand length less than that of bristles with the largest cross sectional area;
  • the hairs of the two groups have, according to their free strand, a difference in length of between 1% and 20% of the length of the longest hairs;
  • the section of the bristles along their connecting section is between 50 and 150 microns; and
  • the bristles whose area of the section at the free end is the smallest preferably represent between 50% and 95% of the total number of hairs of the tuft.

L'invention a en outre pour objet un procédé de fabrication d'un pinceau destiné à l'application d'une composition cosmétique pulvérulente, comportant :

  • une étape d'approvisionnement d'un premier groupe de poils synthétiques ;
  • une étape d'approvisionnement d'un deuxième groupe de poils synthétiques, les poils des premier et deuxième groupes présentant des sections de même surface suivant un tronçon de liaison ;
les poils des premier et deuxième groupes présentant, à une extrémité libre, des sections transversales de surfaces différentes, le premier groupe étant formé de poils de section constante, le deuxième groupe étant formé de poils dont un tronçon d'extrémité est effilé ;
  • une étape de mélange homogène des poils des deux groupes de poils ; et
  • une étape de liaison des poils mélangés suivant leur tronçon de liaison pour former une touffe à l'extrémité d'un manche.
The invention further relates to a method of manufacturing a brush for applying a powdery cosmetic composition, comprising:
  • a step of supplying a first group of synthetic bristles;
  • a step of supplying a second group of synthetic bristles, the bristles of the first and second groups having sections of the same surface along a connecting section;
the bristles of the first and second groups having, at one free end, cross sections of different surfaces, the first group being formed of bristles of constant section, the second group being formed of bristles of which an end section is tapered;
  • a step of homogeneous mixing of the hairs of the two groups of bristles; and
  • a bonding step of the bristles along their connecting section to form a tuft at the end of a handle.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels :

  • la figure 1 est une vue en élévation d'un pinceau selon l'invention ; et
  • la figure 2 est une vue à plus grande échelle d'un ensemble de poils du pinceau de la figure 1.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings in which:
  • the figure 1 is an elevational view of a brush according to the invention; and
  • the figure 2 is a larger-scale view of a set of brush hairs from the figure 1 .

Le pinceau 10 selon l'invention comporte une touffe 12 de poils 14 retenue à une extrémité d'un manche 16 par une virole 18.The brush 10 according to the invention comprises a tuft 12 of bristles 14 retained at one end of a handle 16 by a ferrule 18.

Le manche 16 est formé d'un corps allongé, par exemple une tige de bois profilée. La virole 18 est formée d'une ferrure métallique ceinturant une extrémité du manche 16 et emprisonnant en son seing un tronçon de liaison noté 20 de chacun des poils 14 de la touffe.The handle 16 is formed of an elongate body, for example a profiled wooden rod. The ferrule 18 is formed of a metal fitting surrounding one end of the handle 16 and enclosing in its seing a link section marked 20 of each of the bristles 14 of the tuft.

Tous les tronçons de liaison 20 des poils sont enserrés les uns contre les autres à l'intérieur de la virole, assurant ainsi le maintien et la cohésion de la touffe.All the bristle connecting sections 20 are clamped against each other inside the shell, thus ensuring the maintenance and cohesion of the tuft.

Les tronçons de liaison des poils 14 se prolongent au-delà de la virole 18 pour former chacun un brin libre 22 s'achevant à une extrémité libre 24 du poil.The connecting sections of the bristles 14 extend beyond the ferrule 18 to each form a free strand 22 terminating at a free end 24 of the hair.

Au-delà de la virole 18, les poils 14 s'étendent tous généralement parallèlement l'un à l'autre suivant l'axe du manche 16 ou ils divergent légèrement les uns des autres en direction de leurs extrémités libres 24, pour former une touffe généralement tronconique.Beyond the ferrule 18, the bristles 14 all extend generally parallel to each other along the axis of the handle 16 or they slightly diverge from each other towards their free ends 24, to form a tuft generally frustoconical.

L'extrémité de la touffe 12 est, par exemple, bombée délimitant ainsi une surface convexe. En variante, cette extrémité est plane.The end of the tuft 12 is, for example, curved thus delimiting a convex surface. In a variant, this end is flat.

Les poils 14 sont des poils synthétiques, obtenus par extrusion et filage d'un polymère. Par exemple, les poils sont formés de Polybutylène Téréphtalate (PBT) ou de polyamide.The bristles 14 are synthetic bristles, obtained by extrusion and spinning of a polymer. For example, the bristles are formed of polybutylene terephthalate (PBT) or polyamide.

Avantageusement, tous les poils 14 ont, suivant leur tronçon de liaison 20, une même section. Ces poils sont avantageusement de section circulaire et ont alors tous le même diamètre. Leur diamètre est compris avantageusement entre 50 microns et 150 microns ou mieux, entre 70 microns et 110 microns.Advantageously, all the bristles 14 have, according to their connecting section 20, the same section. These hairs are advantageously of circular section and then all have the same diameter. Their diameter is advantageously between 50 microns and 150 microns or better, between 70 microns and 110 microns.

La touffe 12 comporte au moins deux groupes de poils présentant, à leurs extrémités libres 24, des sections transversales de surfaces différentes. Ainsi, un premier groupe comporte des poils dont la section transversale à l'extrémité libre 24 a une surface inférieure à celle des poils de plus grande section transversale contenus dans le second groupe.The tuft 12 comprises at least two groups of bristles having, at their free ends 24, cross sections of different surfaces. Thus, a first group has bristles whose cross section at the free end 24 has a lower surface area than the bristles of larger cross section contained in the second group.

Ainsi, par exemple, et comme illustré sur la figure 2, un premier groupe de poils 31 est formé de poils de section constante alors que le second groupe de poils 32 est formé de poils dont le tronçon d'extrémité noté 34 est effilé, les poils des premier et deuxième groupes présentant, suivant leur tronçon de liaison 20, et plus largement sur toute leur longueur en dehors des tronçons effilés une même section.So, for example, and as illustrated on the figure 2 a first group of bristles 31 is formed of bristles of constant section whereas the second group of bristles 32 is formed of bristles whose pointed end section 34 is tapered, the bristles of the first and second groups having, according to their stretch of link 20, and more broadly over their entire length outside the tapered sections the same section.

De préférence, les poils 31 et 32 sont formés à partir d'une même fibre, notamment de section circulaire et sont donc constitués du même matériau et présentent rigoureusement une même section suivant leur tronçon de liaison 20.Preferably, the bristles 31 and 32 are formed from the same fiber, in particular of circular section and are therefore made of the same material and have a strictly identical section along their connecting section 20.

Les poils 31 non effilés ont, à leur extrémité 24, un plan de coupe s'étendant généralement perpendiculairement à l'axe du poil.The hairs 31 not tapered at their end 24, a sectional plane extending generally perpendicular to the axis of the hair.

Les poils 32 présentent sur leur tronçon d'extrémité effilé 34 une section progressivement décroissante jusqu'à l'extrémité 24. La variation de diamètre s'effectue continûment et de préférence linéairement suivant la longueur du tronçon effilé 34 depuis le diamètre du tronçon de retenue 20 jusqu'à un diamètre minimal situé à l'extrémité 24.The bristles 32 have on their tapered end portion 34 a gradually decreasing section to the end 24. The variation in diameter is effected continuously and preferably linearly along the length of the tapered section 34 from the diameter of the retaining section To a minimum diameter at the end 24.

La variation de la surface en section des poils à tronçon d'extrémité effilé, suivant la longueur des tronçons effilés 34, est comprise entre 1/20 et 1/50, c'est-à-dire que le rapport de la surface de la section maximale du poil à la surface de la section du poil à son extrémité libre 24 est compris entre 20 et 50. Ce rapport est, de préférence, compris entre 30 et 40.The variation in the cross-sectional area of the tapered end-section bristles, according to the length of the tapered sections 34, is between 1/20 and 1/50, that is to say that the ratio of the surface of the Maximum section of the pile at the surface of the section of the hair at its free end 24 is between 20 and 50. This ratio is preferably between 30 and 40.

Ainsi, le diamètre de la section des poils 32 à l'extrémité libre 24 est, avantageusement, comprise entre 5 microns et 30 microns, mieux entre 10 microns et 20 microns, et de préférence entre 12 microns et 17 microns.Thus, the diameter of the section of the bristles 32 at the free end 24 is advantageously between 5 microns and 30 microns, better still between 10 microns and 20 microns, and preferably between 12 microns and 17 microns.

La longueur LE du tronçon effilé 34 est comprise entre 0,3 centimètre et 3 centimètres, mieux entre 0,5 centimètre et 1,5 centimètre, et de préférence entre 0,8 et 1,2 centimètres.The length LE of the tapered section 34 is between 0.3 centimeters and 3 centimeters, more preferably between 0.5 centimeters and 1.5 centimeters, and preferably between 0.8 and 1.2 centimeters.

Le tronçon effilé 34 s'étend sur entre 10% et 50% de la longueur totale notée LL1 du brin libre 22 des poils 32, mieux entre 10% et 40% et de préférence entre 25% et 35%.The tapered section 34 extends over between 10% and 50% of the total length denoted LL1 of the free strand 22 of the bristles 32, better still between 10% and 40% and preferably between 25% and 35%.

Cette longueur LL1 du brin libre 22 est comprise entre 0,5 centimètre et 7 centimètres, mieux entre 1 centimètre et 5 centimètres, et de préférence entre 3 et 4 centimètres.This length LL1 of the free strand 22 is between 0.5 centimeters and 7 centimeters, better between 1 centimeter and 5 centimeters, and preferably between 3 and 4 centimeters.

Le rapport entre le nombre de poils non effilés 31 et le nombre de poils effilés 32 est tel que la touffe comporte majoritairement des poils effilés. Ainsi, les poils effilés représentent de préférence entre 50% et 95% du nombre total de poils de la touffe, mieux entre 70% et 95%, et de préférence entre 75% et 85%.The ratio between the number of tapered bristles 31 and the number of tapered bristles 32 is such that the tuft mainly comprises tapered bristles. Thus, the tapered hairs preferably represent between 50% and 95% of the total number of hairs of the tuft, better between 70% and 95%, and preferably between 75% and 85%.

La touffe comporte un nombre total de poils compris entre 25 000 et 75 000, et par exemple égal à environ 50 000.The tuft has a total number of hairs of between 25,000 and 75,000, for example about 50,000.

Le tronçon effilé 24 des poils 32 est de préférence obtenu par traitement chimique d'un poil de section constante. Ce traitement s'effectue par exemple par trempage du seul tronçon à effiler dans un bain d'acide. La réduction de diamètre du poil obtenue suivant le tronçon effilé est directement proportionnelle au temps de séjour de la portion du poil dans le bain d'acide.The tapered section 24 of the bristles 32 is preferably obtained by chemical treatment of a bristle of constant section. This treatment is carried out for example by dipping the only portion to be tapered in an acid bath. The reduction in the diameter of the pile obtained along the tapered section is directly proportional to the residence time of the portion of the pile in the acid bath.

Ainsi, pour obtenir un tronçon effilé tronconique, le poil est trempé perpendiculairement à la surface du bain d'acide. Il est introduit dans le bain et sorti du bain avec une vitesse de déplacement constante, conduisant à une variation continue et linéaire de la section du poil.Thus, to obtain a tapered tapered section, the hair is soaked perpendicular to the surface of the acid bath. It is introduced into the bath and out of the bath with a constant speed of movement, leading to a continuous and linear variation of the section of the hair.

Avantageusement, les poils effilés présentent, comme illustré sur les figures 1 et 2, une longueur du brin libre LL1 du poil effilé 32 supérieure à la longueur notée LL2 du brin libre des poils non effilés 31. Ainsi, les extrémités libres des poils effilés 32 font saillie au-delà des extrémités libres des poils non effilés 31.Advantageously, the tapered hairs have, as illustrated on the Figures 1 and 2 a length of the free strand LL1 of the tapered hair 32 greater than the length LL2 of the free strand of the untapered bristles 31. Thus, the free ends of the tapered bristles 32 protrude beyond the free ends of the untapered bristles 31.

De préférence, la différence de longueur notée DL entre les deux groupes de poils 31 et 32 est comprise entre 0,1 centimètre et 1 centimètre, mieux entre 0,2 centimètre et 0,7 centimètre, et de préférence entre 0,3 centimètre et 0,5 centimètre, voire entre 0,3 centimètre et 0,4 centimètre.Preferably, the difference in length denoted DL between the two groups of bristles 31 and 32 is between 0.1 centimeter and 1 centimeter, better still between 0.2 centimeter and 0.7 centimeter, and preferably between 0.3 centimeter and 0.5 cm or even between 0.3 cm and 0.4 cm.

De préférence, la différence de longueur des poils est comprise entre 1% et 20% des poils les plus longs, mieux entre 5% et 15% et de préférence entre 8% et 12%.Preferably, the difference in length of the bristles is between 1% and 20% of the longest hairs, better still between 5% and 15% and preferably between 8% and 12%.

On constate, avec un tel mélange de poils présentant à leur extrémité libre des sections différentes, certains poils étant notamment effilés, un contact sur la peau particulièrement agréable permettant un dépôt satisfaisant de la composition cosmétique. Un tel pinceau, du fait de la présence des poils dont l'extrémité présente un grand diamètre est particulièrement efficace, également, pour le prélèvement de la composition cosmétique dans son contenant de stockage.It is found, with such a mixture of bristles having at their free end different sections, some bristles being particularly tapered, particularly pleasant skin contact allowing a satisfactory deposit of the composition cosmetic. Such a brush, because of the presence of bristles whose end has a large diameter is particularly effective, also for the removal of the cosmetic composition in its storage container.

Le pinceau peut être fabriqué facilement puisqu'il est formé de poils qui, suivant leur tronçon de liaison 20, et notamment sur une partie substantielle de leur longueur, présentent une même section.The brush may be easily manufactured since it is formed of bristles which, along their connecting section 20, and in particular over a substantial part of their length, have the same section.

Pour la fabrication du pinceau, les poils du premier groupe présentant une section constante et les poils du second groupe présentant une extrémité effilée sont chacun fabriqués séparément. Leur mélange est ensuite effectué dans une trémie vibrante assurant un mélange homogène des poils. Tous les poils ayant sur l'essentiel de leur longueur une même section, le mélange rhéologique s'effectue facilement et de manière homogène. La liaison des poils mélangés par la virole à l'extrémité du manche s'effectue de manière connue en soi par compression des poils les uns contre les autres et sertissage de la virole.For the manufacture of the brush, the bristles of the first group having a constant section and the bristles of the second group having a tapered end are each manufactured separately. Their mixing is then carried out in a vibrating hopper ensuring a homogeneous mixture of the bristles. Since all the hairs have the same length of the same section, rheological mixing is easy and homogeneous. The binding of the bristles mixed by the ferrule at the end of the handle is effected in a manner known per se by compressing the bristles against each other and crimping the ferrule.

Dans le mode de réalisation envisagé ici, la touffe du pinceau comporte des poils de section constante et des poils effilés à leur extrémité libre. En variante, qui ne fait pas partie de l'invention, les deux groupes de poils sont effilés à leur extrémité libre, mais le taux d'effilage est différent d'un groupe à l'autre, les surfaces des sections des extrémités libres des poils étant différentes d'un groupe à l'autre, alors que leurs surfaces en section sur le tronçon de liaison sont identiques pour les deux groupes de poils.In the embodiment envisaged here, the tuft of the brush has bristles of constant section and tapered bristles at their free end. Alternatively, which is not part of the invention, the two groups of bristles are tapered at their free end, but the taper rate is different from one group to another, the surfaces of the free end sections of hairs being different from one group to another, while their cross-sectional areas on the connecting section are identical for the two groups of bristles.

A titre d'exemple, un pinceau ayant les caractéristiques suivantes est particulièrement adapté à des applications cosmétiques.
LL1 = 40 mm
LL2 = 37 mm
LE = 10 mm
diamètre des poils : 70 µm
nombre de poils : 27000 environ
ratio entre poils effilés / non effilés : 70/30
composition des poils (en poids) TALC 30,9400 CITRATE DE TRI-ISO-CETYLE 0,0975 NEOPENTANOATE D'ISODECYLE DESODORISE 4,0500 OXYDE DE TITANE 2,0000 OXYDE DE FER JAUNE 3,5200 OXYDES DE FER BRUN JAUNE (75/25) 2,0400 OXYDE DE FER NOIR 0,9000 MICA (CI :77019) (TAILLE : 8 MICRONS) 10,0000 MELANGE P-HYDROXYBENZOATES DE METHYLE, ETHYLE, PROPYLE, BUTYLE ISOBUTYLE PHENOXY-2 ETHANOL 0,6000 MICA 20,0000 POUDRE DE NYLON 12 20,0000 POLY DEMETHYLSILOXANE (VISCOSITE : 10 CST) 1,2266 MELANGE POLY DIMETHYL SII OXANE/TRIMETHYLSTLOXY SILICATE en particulier DOW CORNING593 FLUID de DOW CORNING 0,3861 POLY METHYLCETYL DIMETHYLSILOXANE (PM :900 - VISCOSTH: 15-25 CST), généralement appelé cire de silicones 0,2399 STEARATE DE MAGNESIUM 4,0000 By way of example, a brush having the following characteristics is particularly suitable for cosmetic applications.
LL1 = 40 mm
LL2 = 37 mm
LE = 10 mm
hair diameter: 70 μm
number of hairs: 27000 approximately
ratio of tapered / not tapered hairs: 70/30
hair composition (by weight) TALC 30.9400 TRI-ISO-CETYLE CITRATE 0.0975 NEOPENTANOATE OF ISODECYL DEODORIZED 4.0500 TITANIUM OXIDE 2.0000 YELLOW IRON OXIDE 3.5200 YELLOW BROWN OXIDES (75/25) 2.0400 BLACK IRON OXIDE 0.9000 MICA (CI: 77019) (SIZE: 8 MICRONS) 10.0000 MIXTURE P-HYDROXYBENZOATES OF METHYL, ETHYL, PROPYL, BUTYL ISOBUTYL PHENOXY-2 ETHANOL 0.6000 MICA 20.0000 NYLON POWDER 12 20.0000 POLY DEMETHYLSILOXANE (VISCOSITY: 10 CST) 1.2266 POLY DIMETHYL SII OXANE / TRIMETHYLSTLOXY SILICATE MIXTURE in particular DOW CORNING593 FLUID from Dow Corning .3861 POLY METHYLCETYL DIMETHYLSILOXANE (MW: 900 - VISCOSTH: 15-25 CST), generally called silicone wax .2399 MAGNESIUM STEARATE 4.0000

Dans tout ce qui précède, les sections sont avantageusement prises transversalement à l'axe local du poil au niveau de la section.In all of the above, the sections are advantageously taken transversely to the local axis of the hair at the section.

En outre, comme représenté sur la Figure 2, chaque poil 32 présente, sur toute la longueur du tronçon effilé 34, une section transversale par rapport à l'axe du poil 32 qui est de contour homothétique au contour de la section transversale du poil 32 dans le tronçon de retenue.In addition, as shown on the Figure 2 , each hair 32 has, over the entire length of the tapered section 34, a cross section relative to the axis of the hair 32 which is of homothetic contour to the contour of the cross section of the hair 32 in the retaining section.

Ainsi, si le tronçon de retenue 20 présente une section transversale circulaire de diamètre D1, le tronçon effilé 34 présente une section transversale également circulaire de diamètre D2 inférieur à D1 et diminuant vers l'extrémité libre 24.Thus, if the retaining section 20 has a circular cross section of diameter D1, the tapered section 34 has an equally circular cross section of diameter D2 less than D1 and decreasing towards the free end 24.

Claims (9)

  1. Brush (10) for applying a powdered cosmetic composition, comprising:
    - a tuft (12) of synthetic hairs (14); and
    - a handle (16) supporting the tuft (12) of hairs (14) from a connecting portion (20) of the hairs, each connecting portion extending beyond the handle so as to form a free strand (22) which ends at a free end (24) of the hair,
    the tuft (12) of synthetic hairs comprising at least a first and a second groups of hairs (31, 32) having, at their free ends (24), cross-sections of different surface area,
    the first group being formed of hairs (31) having a constant cross-section, the second group being formed of hairs (32) having a tapered end section (34),
    the hairs of said two groups being mixed homogeneously in said tuft;
    the hairs of the two groups (31, 32) having, in cross-section, the same surface area along their connecting portion (20).
  2. Brush according to claim 1, characterized in that the hairs (32) of the second group are tapered over a length (LE) of between 10% and 50% of the length (LL1) of the free strand (22).
  3. Brush according to claim 2, characterized in that the ratio of the surface areas of the cross-sections of the hairs (32) of the second group between the two ends of the hair is between 20 and 50.
  4. Brush according to any one of the preceding claims, characterized in that the hairs (32) having the smallest surface area of the cross-section at the free end (24) have a length (LL1) of the free strand (22) greater than that of the hairs having the largest surface area of the cross-section at the free end (24).
  5. Brush according to claim 4, characterized in that the hairs (31, 32) of the two groups have, along their free strand (22), a difference in length of between 1% and 20% of the length of the longest hairs.
  6. Brush according to any one of the preceding claims, characterized in that the cross-section of the hairs (31, 32) along their connecting portion (20) is between 50 and 150 microns.
  7. Brush according to any one of the preceding claims, characterized in that the hairs (32) having the smallest surface area of the cross-section at the free end (24) represent preferably between 50% and 95% of the total number of hairs of the tuft.
  8. Brush according to any one of claims 1 to 7, characterized in that the cross-section of each hair (32) of the second group has, along the entire length of the end portion (34), a contour that is homothetic to the contour of the cross-section of the hair (32) in the connecting portion (20).
  9. Method for manufacturing a brush (10) for applying a powdered cosmetic composition, comprising:
    - a step of providing a first group of synthetic hairs (31);
    - a step of providing a second group of synthetic hairs (32), the hairs (31, 32) of the first and second groups having cross-sections of the same surface area along a connecting portion (20),
    the hairs (31, 32) of the first and second groups having, at a free end (24), cross-sections of different surface area, the first group being formed of hairs (31) of constant cross-section, the second group being formed of hairs (32) having a tapered end section (34) ;
    - a step of homogeneously mixing the hairs (31, 32) of the two groups of hairs; and
    - a step of connecting the mixed hairs (31, 32) along their connecting portion (20) so as to form a tuft (14) at the end of a handle (16).
EP09784481.5A 2008-07-09 2009-07-07 Brush for applying a cosmetic composition and having synthetic hairs Not-in-force EP2303061B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0854676A FR2933587B1 (en) 2008-07-09 2008-07-09 BRUSH FOR APPLYING A COSMETIC COMPOSITION WITH SYNTHETIC HAIR
US9191108P 2008-08-26 2008-08-26
PCT/FR2009/051347 WO2010004207A2 (en) 2008-07-09 2009-07-07 Brush for applying a cosmetic composition and having synthetic hairs

Publications (2)

Publication Number Publication Date
EP2303061A2 EP2303061A2 (en) 2011-04-06
EP2303061B1 true EP2303061B1 (en) 2018-08-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09784481.5A Not-in-force EP2303061B1 (en) 2008-07-09 2009-07-07 Brush for applying a cosmetic composition and having synthetic hairs

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US (1) US8549692B2 (en)
EP (1) EP2303061B1 (en)
ES (1) ES2697875T3 (en)
FR (1) FR2933587B1 (en)
WO (1) WO2010004207A2 (en)

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US9089200B2 (en) 2008-08-12 2015-07-28 Anisa International, Inc. Dual sided cosmetics brush and methods for making same
JP6261139B2 (en) * 2013-08-22 2018-01-17 株式会社タイキ Makeup brush
US9320335B2 (en) 2013-12-30 2016-04-26 L'oreal Grooming devices and methods therefor
US9839282B1 (en) * 2014-05-09 2017-12-12 Maria Canales Cosmetic brush device
US9675167B2 (en) * 2014-09-10 2017-06-13 Sigma Enterprises, Llc Multidimensional applicator
USD768998S1 (en) * 2015-05-28 2016-10-18 Nexagen Corp. Portion of a make-up brush
USD789695S1 (en) * 2015-12-15 2017-06-20 Indeutsch Industries Private Limited Cosmetic brush
US20170188691A1 (en) 2016-01-06 2017-07-06 E.L.F. Cosmetics, Inc. Precision cosmetic brush with tapered handle having three sides
EP3205231A1 (en) 2016-02-10 2017-08-16 Trisa Holding AG Household brush device
RU171509U1 (en) * 2016-10-25 2017-06-02 Андрей Леонидович Бяков Paintbrushing element for painting brushes for working with liquid paints
USD801058S1 (en) 2017-03-13 2017-10-31 Sigma Enterprises, Llc Cosmetic brush
USD822277S1 (en) 2017-04-04 2018-07-03 Sigma Enterprises, Llc Cosmetic applicator
USD831970S1 (en) * 2017-09-19 2018-10-30 Paris Presents Incorporated Bristles of a makeup brush
USD831975S1 (en) * 2017-09-19 2018-10-30 Paris Presents Incorporated Makeup brush
USD832593S1 (en) * 2017-12-31 2018-11-06 Beauty Yaurient Cosmetics Accessories (Shenzhen) Co., Ltd. Fan cosmetic brush

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FR2711898B1 (en) * 1993-11-05 1995-12-29 Oreal Brush for applying nail polish, or the like.
US20060123576A1 (en) * 2004-12-13 2006-06-15 Howard Nancy E Brush for applying for nail polish
US20060248669A1 (en) * 2005-05-03 2006-11-09 Royal Brush Manufacturing, Inc. Paint brush
US8186000B2 (en) * 2006-05-23 2012-05-29 Weiler Corporation End brush with reduced bristle flare
US7895698B2 (en) * 2006-12-18 2011-03-01 Fm Brush Co., Inc. Applicator brush
AU2008267192A1 (en) * 2007-06-28 2008-12-31 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Toothbrush with long tapered bristles and short non-tapered bristles

Also Published As

Publication number Publication date
WO2010004207A2 (en) 2010-01-14
EP2303061A2 (en) 2011-04-06
WO2010004207A3 (en) 2010-04-08
US8549692B2 (en) 2013-10-08
ES2697875T3 (en) 2019-01-29
FR2933587A1 (en) 2010-01-15
FR2933587B1 (en) 2011-10-21
US20110185528A1 (en) 2011-08-04

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