WO2012084732A1 - Applicateur et/ou élément de séparation ayant une densité élevée d'éléments faisant saillie à partir d'un support - Google Patents

Applicateur et/ou élément de séparation ayant une densité élevée d'éléments faisant saillie à partir d'un support Download PDF

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Publication number
WO2012084732A1
WO2012084732A1 PCT/EP2011/073112 EP2011073112W WO2012084732A1 WO 2012084732 A1 WO2012084732 A1 WO 2012084732A1 EP 2011073112 W EP2011073112 W EP 2011073112W WO 2012084732 A1 WO2012084732 A1 WO 2012084732A1
Authority
WO
WIPO (PCT)
Prior art keywords
elements
support
member according
less
extension
Prior art date
Application number
PCT/EP2011/073112
Other languages
English (en)
Inventor
Vincent De Laforcade
Olivier Voisin
Original Assignee
L'oreal
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by L'oreal filed Critical L'oreal
Publication of WO2012084732A1 publication Critical patent/WO2012084732A1/fr

Links

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
    • A46B1/00—Brush bodies and bristles moulded as a unit
    • 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
    • A46B9/023—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups arranged like in hair brushes, e.g. hair treatment, dyeing, streaking
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/005—Preparing, i.e. Manufacturing brush bodies by moulding or casting a body around bristles or tufts of bristles

Definitions

  • Applicator and/or separating member having a high density of elements protruding from a support
  • the present invention relates to a member, in particular an applicator and/or separating member, having a high density of elements protruding from a support.
  • the invention is most particularly used in the field of the application of a cosmetic product to keratin materials, and/or the separation of keratin fibres, such as the eyelashes, eyebrows or hair.
  • keratin materials describes together the skin, the lips, the eyelids, the cheeks, the nails and keratin fibres.
  • Cosmetic product is understood to mean a product as defined in Council Directive 93/35/EEC of 14 June 1993.
  • twisted brushes are formed by an assembly of strands arranged in a helical manner by the twisting of metal wires around a layer formed by these strands.
  • Numerous brushes for the application of mascara said brushes being obtained by moulding plastic, are also known.
  • Known in the field of the application of product to the skin are applicator members having a support made, for example, of cellular foam covered with a flocked surface to render it soft.
  • FR2917276 is a method for moulding a brushing or combing member using a very particular mould. This mould is obtained in particular by the assembly of two half-shells around each element to be formed, and of a third component for closing off the cavities formed between the two half-shells so as to define the shape of the elements to be moulded therein.
  • This document enables the manufacture of a member provided with elements that protrude in relation to their support such that the elements are approximately cylindrical.
  • a generatrix of a cylinder that defines the envelope surface of an element forms an angle of less than 2° in any position in relation to a main axis of extension of this element. This method enables the manufacture of a support provided with elements having a diameter of less than 1 mm.
  • the object of the invention is to at least partly solve the problem set by the solutions known from the prior art.
  • the subject of the invention is a member, in particular for applying and/or separating, comprising a support and a plurality of elements protruding from a surface of this support, each element extending along a main axis of extension and being connected by way of its base to the support and having a free end opposite this base, the elements being produced in one piece with the support, characterized in that at least some of the elements are arranged on the support such that the density of the free ends is greater than 3 free ends per mm 2 , and preferably greater than 4 per mm 2 .
  • a distance between two free ends of two adjacent elements within this part may be less than 1 mm.
  • this distance may be less than 0.5 mm and more preferably less than 0.3 mm.
  • at least some of the elements may be configured such that they have a length measured along the main axis of extension of greater than 1 mm, and preferably greater than 5 mm, in particular greater than 8 mm, or even 10 mm.
  • at least some of the elements may be configured such that they have an approximately cylindrical portion such that the generatrix of the cylinder forms an angle of less than 2° in any position in relation to the main axis of extension.
  • these particular elements may be non-conical.
  • at least some of the elements may be configured such that they have a cross section that has a diameter of less than 0.5 mm, and preferably less than 0.3 mm.
  • the elements may have a certain flexibility on account of their fineness.
  • the diameter may be greater than 0.1 mm.
  • At least some of the elements may be configured such that a distance between two adjacent elements is less than 0.5 mm, and preferably less than 0.3 mm.
  • these particular elements provide optimal product loading and progressive releasing of the product onto the keratin materials. This distance may be greater than 0.2 mm.
  • At least some of the elements may be configured such that they do not have a joint face parallel to their axis of extension. At least some of the elements may be disposed in an apparently random manner on the support. Specifically, inasmuch as the elements are obtained by moulding, this technique is not random, but highly reproducible. The appearance of a random arrangement makes it possible to give a "natural" character to these particular elements. Alternatively, an arrangement in rows may also be produced, but the advantage of the invention is that it provides a high density which at the same time is random, thereby making it possible to reproduce at low cost the density of the tufts of bristles or layers of bristles on the brushes and combs obtained by assembly on a support.
  • the elements and the support may be produced by injection-moulding, for example from a thermoplastic elastomeric material, for example styrene-ethylene-butadiene-styrene (SEBS) or a polyester elastomer such as Hytrel ® .
  • SEBS styrene-ethylene-butadiene-styrene
  • Hytrel ® polyester elastomer
  • the elements have a very desirable flexibility for the application of cosmetic product to keratin materials, and in particular the skin.
  • the member could be manufactured from elastomer material, or thermoplastic, or any material that can be moulded.
  • a polymer material will be chosen having stretching properties, to standard IS0527, of between 5% and 800%, and/or a flexural modulus, to standard IS0178, at 23°C, of between 50 MPa and 2000 MPa, and/or tensile strength, to standard IS0527, of between 10 and 3000 MPa, and/or a hardness, to standard IS0868, of between 10 Shore A and 85 Shore D, and/or a melt flow index, to standard IS01 133, of between 2 and 70 g/10 minutes at 190°C/2.16 K.
  • the applicator and/or separating member may comprise a gripping region at the end of which the support is fixed.
  • the complementary part for example the gripping region, could be obtained either by bi-injection moulding, or by overmoulding, or by being joined to the support by any desired joining method.
  • FIG. 1 shows a top view of one embodiment of an applicator member according to the invention
  • FIG. 2 shows a top view of a particular implantation of elements protruding from a surface of an applicator member according to the invention
  • FIG. 3 shows an enlarged view of a region of a number of mm 2 of a surface of the support from which the elements of an applicator member according to the invention protrude;
  • FIG. 4 shows a profile view of two elements of an applicator member according to the invention.
  • Figure 1 shows a comb 1 , used for example for applying a hair dye product to the hair.
  • This comb 1 is an applicator member within the meaning of the invention.
  • Other members may be produced according to the invention, for example brushes for styling the hair, brushes for applying mascara to the eyelashes, combs for applying product to the eyelashes, blusher-type brushes for spreading powder on the skin, cheeks or eyelids.
  • the member may likewise or alternatively be configured to separate the eyelashes when they are already covered with mascara, or in order to arrange them before making them up.
  • the member may also be used to scrape a powder sifter, or else be in the form of a wiper. In the case of the wiper, the free ends of the elements converge radially towards a centre of an approximately tubular support.
  • the member 1 comprises a support 2 and a plurality of elements
  • the support 2 is defined at the end of a handle 5 that serves to make it easier to grip the member.
  • the handle 5 has a main axis of extension X, which corresponds approximately to the main axis of extension of the member 1 .
  • the handle 5 comprises a part that tapers along the axis X, then flares and is formed integrally with the support 2. In this example, the handle 5 and the support 2 are produced in one piece.
  • the plurality of elements 3 comprise at least two elements, preferably at least 50 elements protruding from the support.
  • the surface 4 is defined here in a plane approximately perpendicular to the axis X.
  • the elements all protrude respectively along main axes of extension that are parallel to one another and also parallel to the axis X.
  • not all of the bristles are necessarily parallel to one another, nor are they necessarily parallel to the axis X.
  • this plurality of elements are formed integrally with the support 2.
  • the support and the plurality of elements are produced in one piece.
  • all of the elements protruding from the surface 4 are produced in one piece with the support.
  • the member it is conceivable for the member to comprise other types of protruding elements which are not formed integrally with the support.
  • form integrally is understood to mean production from thermoplastics that are able to be overmoulded one on the other. This definition covers the case in which the assembly is moulded from one and the same thermoplastic.
  • all of the elements have the same length L1 along the axis X.
  • the length L1 is 10 mm here.
  • the length L2 defined between the end of the handle, opposite the surface 4, and this surface 4 is of the order of a number of centimetres, for example at least 8 cm.
  • Each element comprises a base 6, by way of which it is secured to the surface 4, and a free end 7.
  • the free end 7 is axially opposite the base 6.
  • Figure 2 is a view, perpendicular to that in Figure 1 , of the surface 4 and of the elements protruding therefrom.
  • the surface 4 has a thickness e.
  • the thickness e is between 5 and 15 mm.
  • the surface has an approximately parallelepipedal shape, such that the length L3 is much greater than the thickness e.
  • the length L3 is 3 times greater than the thickness e.
  • the length L3 is for example between 10 and 45 mm.
  • the elements 3 are not implanted in regular rows.
  • elements which are respectively adjacent in pairs have bases which are not aligned along a straight line.
  • the mould that is particularly useful for producing a member according to the invention comprises at least one block in which there are formed cavities respectively intended to form the elements. These cavities are for example obtained by electrical discharge machining of a block of steel intended to form the mould. The higher the quality of the steel, for example the higher its purity, the more the cavities can be formed with precision and miniaturization.
  • the various cavities can be produced close to one another but do not have to be aligned.
  • the cavities are open-ended and have a depth of the order of the length L1 of the element to be formed.
  • the elements do not have a joint face along their axis of extension, and they thus have a very smooth surface over the entirety of their outer perimeter.
  • a shell is connected to this steel block in order to close off each of the through-cavities. After demoulding, this shell is spaced apart from the steel block in order to make cleaning easier, in particular at the cavities.
  • This junction contributes towards the formation of an annular joint face at the free end 7.
  • the plurality of elements may have any desired distribution over the surface 4. However, although this distribution is as desired, it may be regular, although this is not a constraint imposed by the moulding technique for obtaining such a member 1 .
  • the advantage of the invention is that it provides a dense implantation of protruding elements on the support.
  • the expression "dense implantation” is understood to mean implantation in which at least 3 free ends of elements are counted in at least one square of 1 mm 2 defined on the surface 4.
  • the 3 free ends each have a cross section, more than half of which is in said square of 1 mm 2 in order to be counted in said mm 2 .
  • a square of 1 mm 2 can be seen, said square having 4 protruding free ends such as 4, all having a circular cross section of approximately the same diameter.
  • the base of the elements could have any desired cross-sectional form, for example a fillet or bevel, but at least one element will have neither a bevel nor a fillet, its base forming a right angle between the outer perimeter of the element and the surface 4.
  • all the elements comprise a base having a circular cross section and an identical diameter.
  • the elements could have a plurality of lengths.
  • the bristles are cylindrical.
  • the maximum diameter d1 of the cross section of the element is more or less always constant. In the example, d1 is equal to 0.3 mm. In the case in which the free end is slightly rounded and not perfectly flat, this maximum diameter is considered to remain constant over 95% of the height of the element along its axis Y.
  • distance between two adjacent elements is understood to mean the shortest distance that can be defined between these two elements. It is thus the distance d2 which can be measured at the base 6 of said two elements, between their respective outer perimeters. In the example shown, d2 is equal to 0.3 mm.
  • the expression “comprising a” should be understood as meaning “comprising at least one", unless specified to the contrary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)

Abstract

L'invention porte sur un élément (1), en particulier pour l'application et/ou la séparation, lequel élément comprend un support (2) et une pluralité d'éléments (3) faisant saillie à partir d'une surface (4) de ce support, chaque élément s'étendant le long d'un axe d'étendue principal (X) et étant relié à l'aide de sa base (6) au support, et ayant une extrémité libre (7) opposée à cette base, les éléments étant produits d'un seul tenant avec le support, au moins certains des éléments étant disposés sur le support de sorte que la densité des extrémités libres soit supérieure à 3 extrémités libres par mm², et de préférence, supérieure à 4.
PCT/EP2011/073112 2010-12-21 2011-12-16 Applicateur et/ou élément de séparation ayant une densité élevée d'éléments faisant saillie à partir d'un support WO2012084732A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1060968A FR2968907B1 (fr) 2010-12-21 2010-12-21 Organe d'application et ou de separation presentant une haute densite d'elements dresses depuis un support
FR1060968 2010-12-21
US201061427613P 2010-12-28 2010-12-28
US61/427,613 2010-12-28

Publications (1)

Publication Number Publication Date
WO2012084732A1 true WO2012084732A1 (fr) 2012-06-28

Family

ID=44340277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/073112 WO2012084732A1 (fr) 2010-12-21 2011-12-16 Applicateur et/ou élément de séparation ayant une densité élevée d'éléments faisant saillie à partir d'un support

Country Status (2)

Country Link
FR (1) FR2968907B1 (fr)
WO (1) WO2012084732A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3461367B1 (fr) * 2017-09-28 2020-04-22 The Procter & Gamble Company Procédé de fabrication d'une tête de brosse monobloc et tête de brosse à dents monobloc

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565205A (en) * 1983-03-18 1986-01-21 Super Brush Co., Inc. Molded mascara applicator
FR2607373A1 (fr) 1986-11-28 1988-06-03 Oreal Brosse pour l'application de mascara sur les cils
EP0694266A1 (fr) * 1994-07-12 1996-01-31 L'oreal Applicateur pour l'application d'un produit cosmétique liquide et ensemble de maquillage muni d'un tel applicateur
EP0861617A1 (fr) * 1997-02-21 1998-09-02 L'oreal Ensemble de conditionnement et d'application d'un produit de maquillage de fibres kératiniques
US20030163884A1 (en) * 2000-07-10 2003-09-04 Georg Weihrauch Method and device for producing bristle products and bristle products
EP1932444A1 (fr) * 2006-12-12 2008-06-18 L'oreal Applicateur pour appliquer un produit sur les cils ou les sourcils
US20080283078A1 (en) * 2007-05-15 2008-11-20 Geka Brush Gmbh Cosmetic brush with many bristles for applying a cosmetic product
FR2917276A1 (fr) 2007-06-15 2008-12-19 Cinqpats Soc Par Actions Simpl Dispositif et conditionnement de brossage et de peignage de precision, ainsi que procede et outillage d'obtention

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565205A (en) * 1983-03-18 1986-01-21 Super Brush Co., Inc. Molded mascara applicator
FR2607373A1 (fr) 1986-11-28 1988-06-03 Oreal Brosse pour l'application de mascara sur les cils
EP0694266A1 (fr) * 1994-07-12 1996-01-31 L'oreal Applicateur pour l'application d'un produit cosmétique liquide et ensemble de maquillage muni d'un tel applicateur
EP0861617A1 (fr) * 1997-02-21 1998-09-02 L'oreal Ensemble de conditionnement et d'application d'un produit de maquillage de fibres kératiniques
US20030163884A1 (en) * 2000-07-10 2003-09-04 Georg Weihrauch Method and device for producing bristle products and bristle products
EP1932444A1 (fr) * 2006-12-12 2008-06-18 L'oreal Applicateur pour appliquer un produit sur les cils ou les sourcils
US20080283078A1 (en) * 2007-05-15 2008-11-20 Geka Brush Gmbh Cosmetic brush with many bristles for applying a cosmetic product
FR2917276A1 (fr) 2007-06-15 2008-12-19 Cinqpats Soc Par Actions Simpl Dispositif et conditionnement de brossage et de peignage de precision, ainsi que procede et outillage d'obtention

Also Published As

Publication number Publication date
FR2968907A1 (fr) 2012-06-22
FR2968907B1 (fr) 2013-09-13

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