EP3214972A1 - Cosmetic applicator having fibres - Google Patents

Cosmetic applicator having fibres

Info

Publication number
EP3214972A1
EP3214972A1 EP15790950.8A EP15790950A EP3214972A1 EP 3214972 A1 EP3214972 A1 EP 3214972A1 EP 15790950 A EP15790950 A EP 15790950A EP 3214972 A1 EP3214972 A1 EP 3214972A1
Authority
EP
European Patent Office
Prior art keywords
portions
fibre
section
fibres
different materials
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.)
Withdrawn
Application number
EP15790950.8A
Other languages
German (de)
French (fr)
Inventor
Davide Manici
Eric Caulier
Alain Berhault
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
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 LOreal SA filed Critical LOreal SA
Publication of EP3214972A1 publication Critical patent/EP3214972A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/18—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier the bristles being fixed on or between belts or wires
    • 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
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0207—Bristles characterised by the choice of material, e.g. metal
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0238—Bristles with non-round cross-section
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara

Definitions

  • the present invention relates to a device for packaging and applying a makeup product to human keratin materials and to a makeup method.
  • the invention relates more particularly to a packaging and application device having an applicator that has an applicator member comprising fibres for applying the product to the keratin materials, in particular the eyelashes and/or eyebrows.
  • a large number of applicators of this type in which the applicator member is in the form of a brush referred to as a twisted wire brush having a core formed by two anus of a metal wire that are twisted together and grip the fibres, or is in the form of a brush referred to as a baleen brush, having a bundle of substantially parallel fibres, are known.
  • Patent Applications US 2002/0034636 and US 2004/0091704 and Patent US 6 391 445 relate to brushes for oral or bodily hygiene.
  • Patent Application US 2002/0034636 discloses fibres comprising a first polymer and a second polymer embedded as a thin layer in the first polymer. Under the action of a sufficient mechanical force, the fibre splits into a plurality of filaments at the thin layers formed by the second polymer.
  • Patent Application US 2004/0091704 describes co-extruded fibres that each comprise two materials, at least one of which comprises a mixture of polyamide and polyester.
  • the fibre can consist of a core made of a first material, defining a portion of the periphery of the fibre, and of a segment made of a second material, completing the periphery.
  • Patent US 6 391 445 relates to fibres that each comprise a plastic core and a jacket made of profiled thermoplastic elastomer.
  • European Patent Application EP 0 933 043 relates to a twisted wire brush.
  • the fibres have at least two preferential deformation zones that define, in cross section, articulations.
  • the latter can be formed by two narrowed zones or by zones that comprise a more flexible material.
  • a subject of the invention is a device for packaging and applying a makeup product, having:
  • an applicator for applying the cosmetic product having:
  • an applicator member having a plurality of fibres, the fibres each having a plurality of portions, at least two portions of which are made of different materials, and the fibres not having, in cross section, an articulated zone defined by one of said portions,
  • a "portion” is understood to be a single-material part of the fibre, delimited by the outer surface of the fibre and/or by at least one other part of the fibre, formed of a different material.
  • the portions of different materials each define, in cross section, a part of the outer perimeter makes it possible in particular to have different properties on one and the same fibre, in particular different affinities with regard to certain constituents that are used in the formulation of the makeup product.
  • the two materials may have different heat shrink properties, thereby making it possible to give each fibre, by heating, a curvature that is dependent on the arrangement of said portions within the fibre.
  • the cross section of the fibres according to the invention is particularly advantageous when the fibres are used to manufacture a mascara brush, being clamped between two metal strands that are twisted together.
  • the fibres according to the invention tend to be oriented in different directions depending on the way in which each is clamped between the strands. Since the orientation of the section of the fibres between the strands of the core is random, this tends to break the spiral effect on the brush and makes it possible to obtain improved performance in terms of loading and separation of the eyelashes and/or eyebrows.
  • Each fibre may have between 2 and 8 of said portions.
  • Each fibre may have between 2 and 4 portions made of different materials. Said portions may be co-extruded.
  • the fibres may have a cylindrical shape.
  • the fibres may have a circular or non- circular cross section, in particular in the shape of a ⁇ , a double blade, a regular or irregular polygon, a droplet, nested circles, or a star, this list not being limiting.
  • the fibres may or may not have a concavity towards the outside in cross section.
  • the fibres may have a solid or hollow cross section.
  • the abovementioned portions may each have a constant section and extend longitudinally along the entire length of the fibre. Preferably, said portions are continuous along the entire length of the fibre. This makes it easier to manufacture said fibres, in particular by co-extrusion.
  • the portions are each made of a plastics material, in particular of a thermoplastic material, notably polyamide (PA), elastomer, notably polytetrafluoroethylene (PTFE), polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and polyamide.
  • a plastics material in particular of a thermoplastic material, notably polyamide (PA), elastomer, notably polytetrafluoroethylene (PTFE), polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and polyamide.
  • PA polyamide
  • elastomer notably polytetrafluoroethylene (PTFE), polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and polyamide.
  • PTFE polyte
  • At least two of said portions made of different materials have a difference of at least 10 units on the same Shore hardness scale, better still a difference of at least 20 units.
  • Such a difference in hardness makes it possible to have fibres which have different flexibility depending on the bending direction.
  • Said portions made of different materials preferably each occupy, in cross section, between 20% and 80% of the section formed by the joining of this portion to another, adjacent portion made of a different material, better still between 30% and 70%, even better still between 40% and 60%.
  • the adjacent portions made of different materials are separated, in cross section, by a contact line with a length greater than or equal to 1/16, better still greater than or equal to 1/8, of the perimeter of the area formed by the joining of said two adjacent portions.
  • This perimeter can correspond to the total perimeter of the fibre when the latter only has two portions.
  • Each portion may have a perimeter in cross section which has or does not have a concavity.
  • Each portion may have a cross section with a shape that is substantially circular or non-circular, in particular in the shape of an oval, an ellipse, a regular or irregular polygon, in particular a triangle, a comma, a sector, a star, a kidney or a pear.
  • Each fibre preferably has a shape factor Lie less than or equal to 5, better still less than or equal to 4, the shape factor L/e being defined in cross section by the ratio of the greatest length L of the fibre to the greatest dimension e of the fibre in a direction perpendicular to that of the greatest length L.
  • the greatest width L of the fibre in section may be between 0.05 mm and 0.5 mm, better still between 0.1 and 0.3 mm.
  • the greatest dimension e of the fibre in a direction perpendicular to the greatest width L is between 0.03 mm and 0.5 mm, better still between 0.05 mm and 0.3 mm.
  • the cross section of the fibres is preferably never the image of itself when rotated through an angle less than 180°.
  • At least one of said portions may have, in cross section, a region that narrows towards the outside.
  • the fibre may have two separated portions made of one and the same material, these two portions being for example diametrically opposed.
  • the applicator may have at least two different sorts of fibre.
  • the applicator may have a stem to which the applicator member is fixed.
  • the applicator may alternatively have a bundle of fibres, the fibres being substantially parallel to one another and forming a brush of the baleen type or a fine brush.
  • the stem of the applicator may then have a longitudinal axis substantially parallel to the fibres.
  • the stem is substantially perpendicular to the fibres.
  • a further subject of the invention is a makeup method comprising the step of applying a makeup product to human keratin materials with the packaging and application device according to the invention.
  • a further subject of the invention is a method for manufacturing a packaging and application device according to the invention, comprising the step of heating the applicator member so as to bring about the deformation of the fibres.
  • those portions of the fibres that are made of different materials have different heat shrink properties.
  • the portions shrink differently, and the fibres then each assume a corresponding curvature.
  • FIG. 1 schematically shows an example of a packaging and application device
  • FIG. 17 is an elevation view of another example of an applicator.
  • the packaging and application device 1 shown in Figure 1 has a container 2 containing a makeup product P to be applied, in particular to the eyelashes or the eyebrows, for example mascara, and an applicator 3 having a stem 4 of longitudinal axis X, provided at one end 4a with an applicator member 5 and at the opposite end with a gripping member 6 that likewise serves to close the container 2.
  • the latter has a neck 7 which is externally threaded so as to allow the gripping member 6 to be screwed on.
  • a wiping member 8 is fixed inside the neck 7 in order to wipe the stem 4 and the applicator member 5 as they are withdrawn from the container 2.
  • This wiping member 8 has a flexible lip 9 that defines a, for example circular, wiping orifice, the diameter of which corresponds more or less to that of the stem 4.
  • the invention is not limited to the use of a particular wiping member and further wiping members can be used, for example a wiping member with a wavy lip and/or having one or more slits.
  • the stem 4 is rectilinear but it could be curved without departing from the scope of the present invention.
  • the applicator member 5 has a twisted core 10 formed in a conventional manner by two metal strands that are twisted together, in particular two strands made of one and the same metal wire folded on itself. This core 10 is fixed at one end in a housing in the stem 4, being for example force-fitted into this housing.
  • the applicator member 5 has fibres 1 1 which are held in a clamped manner between the twisted metal strands of the core 10.
  • these fibres 11 each have at least two portions 13 and 15 made of different materials.
  • the portions 13 and 15 are preferably made of a plastics material, preferably of a thermoplastic material, in particular polyamide (PA), elastomer, polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and PA.
  • a plastics material preferably of a thermoplastic material, in particular polyamide (PA), elastomer, polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and PA.
  • the fibres 11 are formed by co-extrusion.
  • the greatest width L of the fibre 11 in section in this case the diameter, may be between 0.1 and 0.3 mm.
  • the fibre 11 has a circular shape in section and the portions 13 and 15 are each in the form of a semicircle and define half of the fibre 11 in section.
  • the shape factor L/e is in this case equal to 1.
  • the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the perimeter p of the area formed by the two portions 13 and 15, corresponding in this case to the total perimeter of the fibre 1 1.
  • the ratio Sis/p is in this case equal to 1/ ⁇ .
  • the example in Figure 3 differs from the one in Figure 2 in that it has four distinct sectors 13a, 13b, 15a and 15b made of two different materials, each forming a portion within the meaning of the invention and each occupying a quarter of the section of the fibre 11.
  • the diametrically opposed portions 13a and 13b are made of a first material, and the likewise diametrically opposed portions 15a and 15b are made of a second material.
  • the ratio S35/P is in this case equal to 1/( ⁇ +2), p being the perimeter of the area formed by two adjacent portions, in this case corresponding to the perimeter of a half-fibre 11.
  • the example in Figure 4 differs from the one in Figure 3 in that the fibre has two diametrically opposed portions 13a and 13b made of one and the same first material, and two portions 15 and 17 made of respective second and third materials, the portions 13a, 13b, 15a and 15b each occupying a quarter of the section of the fibre 11.
  • the example in Figure 5 differs from the one in Figure 2 in that the fibre 1 1 has three portions 13, 15 and 17 made of different materials.
  • the portion 13 has a section which is twice that of the two other portions 15 and 17 that each occupy a quarter of the section of the fibre 11.
  • the ratios Sss/pss and S37/P37 are equal to 1/(3 ⁇ /2+2) and the ratio S57/PS7 is equal to 1/( ⁇ +2), p3s being the perimeter of the area formed by the pair of adjacent portions 13 and 15, ps7 being the perimeter of the area formed by the pair of adjacent portions 13 and 17, and ps7 being the perimeter of the area formed by the pair of adjacent portions 15 and 17.
  • the example in Figure 6 differs from the one in Figure 3 in that the fibre 11 has four portions 13, 15. 17 and 19 made of four respective different materials that each occupy a quarter of the fibre 11.
  • the example in Figure 7 differs from the one in Figure 6 in that the four portions 13, 15, 17 and 19 occupy sectors of the fibre 11 with different sizes.
  • the contact lines S35, S57, S79 and S39 are in this case identical lengths that are equal to the radius of the cross section of the fibre 11.
  • the ratios Si/pa are different for each pair of adjacent portions made of different materials but are each less than or equal to 1/16, better still 1/8, py being the perimeter of the area formed by the pair of adjacent portions li and lj.
  • Figure 8 illustrates a fibre 11 having a section in the shape of a droplet (tear) having a first portion 13 made of a first material, having a circular section forming the round part of the droplet, and a second portion 15 made of a second material, having a substantially triangular shape in section, forming the point of the droplet.
  • the shape factor L/e is less than 2.
  • the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 1 1.
  • Figure 9 shows a fibre 1 1, the section of which is in the form of nested discs, having two portions 13 and 15 made of different materials.
  • the portion 13 forms a large circle and the portion 15 forms a small circle nested in the portion 13.
  • the shape factor L/e is less than 2.
  • the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 11.
  • the fibre 11 is in the overall shape of a ⁇ in section, the fibre 11 narrowing towards the top, terminating at a point oriented towards the right, and narrowing towards the bottom, terminating in a point oriented towards the left.
  • the first portion 13 forms the central part and top of the ⁇ and the portion 15 forms the bottom part of the ⁇ .
  • the shape factor L/e is less than 4.
  • the external contour of the fibre 11 may be symmetric with respect to its central axis.
  • the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of
  • the example in Figure 11 differs from the one in Figure 10 in that the first portion 13 has a circular shape in section and forms the core of the ⁇ .
  • the second portion 15 covers all of the first portion 13 and gives the fibre 11 its ⁇ shape in section.
  • the fibre is symmetric with respect to its central axis.
  • Figure 12 shows a fibre 11 in which the first portion 13 has a circular shape.
  • the second portion 15 covers all of the first portion 13 in section and forms points 21 diametrically away from one another relative to the central axis of the fibre 11.
  • the shape ratio Ue is less than 3.
  • the fibre 11 is symmetric with respect to its central axis. In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 11.
  • the example in Figure 13 differs from those in the preceding figures in that the fibre 11 has three portions 13, 15a and 15b made of two different materials.
  • the portion 13, of circular section is made of a first material and the portions 15a and 15b are made of a second material, each being substantially in the form of an isosceles triangle in section.
  • the portion 13 forms the centre of the fibre 11 and the portions 15a and 15b face away from one another relative to the central axis of the fibre 11, their bases 23 being in contact with the portion 13.
  • the contact line S35a between the portions 13 and 15a has a size greater than 1/8 of the perimeter p a of the section formed by the portions 13 and 15a
  • the contact line 835b between the portions 13 and 15b has a size greater than 1/8 of the perimeter pt of the section formed by the portions 13 and 15b.
  • the example in Figure 14 differs from the one in Figure 4 in that the fibre 11 is Y-shaped and has three portions 13, 15 and 17 made of three different materials that each occupy a third of the fibre 11 in section.
  • Each portion 13, 15 and 17 can form one arm of the Y.
  • each portion can form a V extending on two arms of the Y.
  • the legs of the Y form an angle a equal to 120° between one another, but this does not have to be the case.
  • the contact lines S35, S37 and S57 have a size greater than 1/16 of the respective parameters P35, P37 and P57.
  • the ratio L/e is less than 2.
  • the example in Figure 15 differs from the one in Figure 14 in that the fibre has two portions 13 and 14 made of two different materials.
  • the first portion 13 forms an arm of the Y and the second portion 15 forms two arms of the Y.
  • the first portion 13 may be V-shaped and the second portion 15 Y-shaped.
  • Figure 16 illustrates a fibre 11 in section in the form of a double blade having two portions 13 and 15 made of two different materials.
  • the first portion 13 has a circular shape and defines the core of the fibre 11
  • the second portion 15 surrounds the first portion with a central part in the form of a circle and has ends in the form of blades. The ends narrow and are each connected in section to the central part by a straight line 30 and a curve 32 that is concave towards the outside.
  • the concave curve 32 has a radius of curvature R less than or equal to the radius of the central part of the second portion.
  • the fibres may be hollow.
  • Figure 16 illustrates an applicator having a stem 4 of longitudinal axis X, provided at one end 4a with an applicator member 5 and at the opposite end with a gripping member 6, the applicator member 5 being formed by a bundle of substantially parallel fibres 11 according to the invention.
  • the brush can be subjected to a hot air blower in order to cause at least some of the fibres to deform.
  • the fibres can also be brought into contact with a hot surface.
  • the exposure to a heating means can cause the fibres to curve, on account of the presence of the portions made of different materials.

Landscapes

  • Brushes (AREA)
  • Multicomponent Fibers (AREA)

Abstract

The present invention relates to a device for packaging and applying a makeup product, having: - a reservoir containing the makeup product to be applied, and - an applicator for applying the makeup product, having: • an applicator member, carried by the stem, having a plurality of fibres (11), the fibres (11) having a plurality of portions (13, 15), at least two portions (13, 15) of which are made of different materials, and the fibres not having, in cross section, an articulated zone defined by one of the portions (13, 15), (i) the portions (13, 15) made of different materials each defining a part of the outer perimeter p of the fibre in section, or (ii) one of the portions (13, 15) made of different materials entirely surrounding the other in section and having at least one region that narrows towards the outside.

Description

"Cosmetic applicator having fibres"
The present invention relates to a device for packaging and applying a makeup product to human keratin materials and to a makeup method.
The invention relates more particularly to a packaging and application device having an applicator that has an applicator member comprising fibres for applying the product to the keratin materials, in particular the eyelashes and/or eyebrows.
A large number of applicators of this type, in which the applicator member is in the form of a brush referred to as a twisted wire brush having a core formed by two anus of a metal wire that are twisted together and grip the fibres, or is in the form of a brush referred to as a baleen brush, having a bundle of substantially parallel fibres, are known.
Patent Applications US 2002/0034636 and US 2004/0091704 and Patent US 6 391 445 relate to brushes for oral or bodily hygiene.
Patent Application US 2002/0034636 discloses fibres comprising a first polymer and a second polymer embedded as a thin layer in the first polymer. Under the action of a sufficient mechanical force, the fibre splits into a plurality of filaments at the thin layers formed by the second polymer.
Patent Application US 2004/0091704 describes co-extruded fibres that each comprise two materials, at least one of which comprises a mixture of polyamide and polyester. The fibre can consist of a core made of a first material, defining a portion of the periphery of the fibre, and of a segment made of a second material, completing the periphery.
Patent US 6 391 445 relates to fibres that each comprise a plastic core and a jacket made of profiled thermoplastic elastomer.
European Patent Application EP 0 933 043 relates to a twisted wire brush.
Along their length, the fibres have at least two preferential deformation zones that define, in cross section, articulations. The latter can be formed by two narrowed zones or by zones that comprise a more flexible material.
There is a need to further improve applicators for applying a makeup product to human keratin materials, and more particularly but not exclusively the eyelashes and/or eyebrows. Thus, a subject of the invention is a device for packaging and applying a makeup product, having:
- a reservoir containing the makeup product to be applied, and
- an applicator for applying the cosmetic product, having:
· an applicator member having a plurality of fibres, the fibres each having a plurality of portions, at least two portions of which are made of different materials, and the fibres not having, in cross section, an articulated zone defined by one of said portions,
(i) the portions each defining a part of the outer perimeter of the fibre in cross section, or
(ii) one of said portions entirely surrounding the other of said portions made of different materials in cross section and having at least one region that narrows towards the outside.
A "portion" is understood to be a single-material part of the fibre, delimited by the outer surface of the fibre and/or by at least one other part of the fibre, formed of a different material.
The fact that the portions of different materials each define, in cross section, a part of the outer perimeter makes it possible in particular to have different properties on one and the same fibre, in particular different affinities with regard to certain constituents that are used in the formulation of the makeup product.
This can make it possible to increase the retention of the product by the fibre and/or to have an applicator that is compatible with a greater variety of products.
The two materials may have different heat shrink properties, thereby making it possible to give each fibre, by heating, a curvature that is dependent on the arrangement of said portions within the fibre.
The cross section of the fibres according to the invention is particularly advantageous when the fibres are used to manufacture a mascara brush, being clamped between two metal strands that are twisted together. In this case, the fibres according to the invention tend to be oriented in different directions depending on the way in which each is clamped between the strands. Since the orientation of the section of the fibres between the strands of the core is random, this tends to break the spiral effect on the brush and makes it possible to obtain improved performance in terms of loading and separation of the eyelashes and/or eyebrows.
Each fibre may have between 2 and 8 of said portions.
Each fibre may have between 2 and 4 portions made of different materials. Said portions may be co-extruded.
The fibres may have a cylindrical shape. The fibres may have a circular or non- circular cross section, in particular in the shape of a §, a double blade, a regular or irregular polygon, a droplet, nested circles, or a star, this list not being limiting.
The fibres may or may not have a concavity towards the outside in cross section.
The fibres may have a solid or hollow cross section.
The abovementioned portions may each have a constant section and extend longitudinally along the entire length of the fibre. Preferably, said portions are continuous along the entire length of the fibre. This makes it easier to manufacture said fibres, in particular by co-extrusion.
Preferably, the portions are each made of a plastics material, in particular of a thermoplastic material, notably polyamide (PA), elastomer, notably polytetrafluoroethylene (PTFE), polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and polyamide. Such materials make it possible to have fibres that are easy to manufacture, with good flexibility properties. Preferably, at least one of the portions is made of PTFE. This material has good sliding properties on keratin fibres.
Preferably, at least two of said portions made of different materials have a difference of at least 10 units on the same Shore hardness scale, better still a difference of at least 20 units. Such a difference in hardness makes it possible to have fibres which have different flexibility depending on the bending direction.
Said portions made of different materials preferably each occupy, in cross section, between 20% and 80% of the section formed by the joining of this portion to another, adjacent portion made of a different material, better still between 30% and 70%, even better still between 40% and 60%.
Preferably, the adjacent portions made of different materials are separated, in cross section, by a contact line with a length greater than or equal to 1/16, better still greater than or equal to 1/8, of the perimeter of the area formed by the joining of said two adjacent portions. This perimeter can correspond to the total perimeter of the fibre when the latter only has two portions.
Each portion may have a perimeter in cross section which has or does not have a concavity.
Each portion may have a cross section with a shape that is substantially circular or non-circular, in particular in the shape of an oval, an ellipse, a regular or irregular polygon, in particular a triangle, a comma, a sector, a star, a kidney or a pear.
Each fibre preferably has a shape factor Lie less than or equal to 5, better still less than or equal to 4, the shape factor L/e being defined in cross section by the ratio of the greatest length L of the fibre to the greatest dimension e of the fibre in a direction perpendicular to that of the greatest length L.
As a result, the fibres are flattened relatively little.
The greatest width L of the fibre in section may be between 0.05 mm and 0.5 mm, better still between 0.1 and 0.3 mm.
The greatest dimension e of the fibre in a direction perpendicular to the greatest width L is between 0.03 mm and 0.5 mm, better still between 0.05 mm and 0.3 mm.
The cross section of the fibres is preferably never the image of itself when rotated through an angle less than 180°.
At least one of said portions may have, in cross section, a region that narrows towards the outside.
The fibre may have two separated portions made of one and the same material, these two portions being for example diametrically opposed.
The applicator may have at least two different sorts of fibre.
The applicator may have a stem to which the applicator member is fixed.
Although the invention applies preferably to a twisted wire brush, the applicator may alternatively have a bundle of fibres, the fibres being substantially parallel to one another and forming a brush of the baleen type or a fine brush. The stem of the applicator may then have a longitudinal axis substantially parallel to the fibres. In a variant, as in the case of a twisted wire brush, the stem is substantially perpendicular to the fibres. A further subject of the invention is a makeup method comprising the step of applying a makeup product to human keratin materials with the packaging and application device according to the invention.
A further subject of the invention is a method for manufacturing a packaging and application device according to the invention, comprising the step of heating the applicator member so as to bring about the deformation of the fibres.
Preferably, those portions of the fibres that are made of different materials have different heat shrink properties. During the heating step, the portions shrink differently, and the fibres then each assume a corresponding curvature.
The invention may be better understood from reading the following detailed description of non-limiting illustrative embodiments thereof and from examining the appended drawing, in which:
- Figure 1 schematically shows an example of a packaging and application device,
- Figures 2 to 16 illustrate variants of fibres in cross section, and
- Figure 17 is an elevation view of another example of an applicator. The packaging and application device 1 shown in Figure 1 has a container 2 containing a makeup product P to be applied, in particular to the eyelashes or the eyebrows, for example mascara, and an applicator 3 having a stem 4 of longitudinal axis X, provided at one end 4a with an applicator member 5 and at the opposite end with a gripping member 6 that likewise serves to close the container 2. The latter has a neck 7 which is externally threaded so as to allow the gripping member 6 to be screwed on.
A wiping member 8 is fixed inside the neck 7 in order to wipe the stem 4 and the applicator member 5 as they are withdrawn from the container 2. This wiping member 8 has a flexible lip 9 that defines a, for example circular, wiping orifice, the diameter of which corresponds more or less to that of the stem 4.
Of course, the invention is not limited to the use of a particular wiping member and further wiping members can be used, for example a wiping member with a wavy lip and/or having one or more slits.
In the example illustrated, the stem 4 is rectilinear but it could be curved without departing from the scope of the present invention. In the example in question, the applicator member 5 has a twisted core 10 formed in a conventional manner by two metal strands that are twisted together, in particular two strands made of one and the same metal wire folded on itself. This core 10 is fixed at one end in a housing in the stem 4, being for example force-fitted into this housing.
The applicator member 5 has fibres 1 1 which are held in a clamped manner between the twisted metal strands of the core 10.
As can be seen in particular in Figure 2, these fibres 11 each have at least two portions 13 and 15 made of different materials.
The portions 13 and 15 are preferably made of a plastics material, preferably of a thermoplastic material, in particular polyamide (PA), elastomer, polybutadiene terephthalate (PBT), rubber, or mixtures thereof, in particular a mixture of PA, PBT and rubber or elastomer and PA.
Preferably, the fibres 11 are formed by co-extrusion.
The greatest width L of the fibre 11 in section, in this case the diameter, may be between 0.1 and 0.3 mm.
In the example in Figure 2, the fibre 11 has a circular shape in section and the portions 13 and 15 are each in the form of a semicircle and define half of the fibre 11 in section. The shape factor L/e is in this case equal to 1.
In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the perimeter p of the area formed by the two portions 13 and 15, corresponding in this case to the total perimeter of the fibre 1 1. The ratio Sis/p is in this case equal to 1/π.
The example in Figure 3 differs from the one in Figure 2 in that it has four distinct sectors 13a, 13b, 15a and 15b made of two different materials, each forming a portion within the meaning of the invention and each occupying a quarter of the section of the fibre 11. The diametrically opposed portions 13a and 13b are made of a first material, and the likewise diametrically opposed portions 15a and 15b are made of a second material. The ratio S35/P is in this case equal to 1/(π+2), p being the perimeter of the area formed by two adjacent portions, in this case corresponding to the perimeter of a half-fibre 11. The example in Figure 4 differs from the one in Figure 3 in that the fibre has two diametrically opposed portions 13a and 13b made of one and the same first material, and two portions 15 and 17 made of respective second and third materials, the portions 13a, 13b, 15a and 15b each occupying a quarter of the section of the fibre 11.
The example in Figure 5 differs from the one in Figure 2 in that the fibre 1 1 has three portions 13, 15 and 17 made of different materials. The portion 13 has a section which is twice that of the two other portions 15 and 17 that each occupy a quarter of the section of the fibre 11. The ratios Sss/pss and S37/P37 are equal to 1/(3π/2+2) and the ratio S57/PS7 is equal to 1/(π+2), p3s being the perimeter of the area formed by the pair of adjacent portions 13 and 15, ps7 being the perimeter of the area formed by the pair of adjacent portions 13 and 17, and ps7 being the perimeter of the area formed by the pair of adjacent portions 15 and 17.
The example in Figure 6 differs from the one in Figure 3 in that the fibre 11 has four portions 13, 15. 17 and 19 made of four respective different materials that each occupy a quarter of the fibre 11.
The example in Figure 7 differs from the one in Figure 6 in that the four portions 13, 15, 17 and 19 occupy sectors of the fibre 11 with different sizes. The contact lines S35, S57, S79 and S39 are in this case identical lengths that are equal to the radius of the cross section of the fibre 11. The ratios Si/pa are different for each pair of adjacent portions made of different materials but are each less than or equal to 1/16, better still 1/8, py being the perimeter of the area formed by the pair of adjacent portions li and lj.
Figure 8 illustrates a fibre 11 having a section in the shape of a droplet (tear) having a first portion 13 made of a first material, having a circular section forming the round part of the droplet, and a second portion 15 made of a second material, having a substantially triangular shape in section, forming the point of the droplet. The shape factor L/e is less than 2. In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 1 1.
Figure 9 shows a fibre 1 1, the section of which is in the form of nested discs, having two portions 13 and 15 made of different materials. The portion 13 forms a large circle and the portion 15 forms a small circle nested in the portion 13. The shape factor L/e is less than 2. In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 11. In the example illustrated in Figure 10, the fibre 11 is in the overall shape of a § in section, the fibre 11 narrowing towards the top, terminating at a point oriented towards the right, and narrowing towards the bottom, terminating in a point oriented towards the left. The first portion 13 forms the central part and top of the § and the portion 15 forms the bottom part of the §. The shape factor L/e is less than 4. The external contour of the fibre 11 may be symmetric with respect to its central axis. In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 11.
The example in Figure 11 differs from the one in Figure 10 in that the first portion 13 has a circular shape in section and forms the core of the §. The second portion 15 covers all of the first portion 13 and gives the fibre 11 its § shape in section. The fibre is symmetric with respect to its central axis.
Figure 12 shows a fibre 11 in which the first portion 13 has a circular shape. The second portion 15 covers all of the first portion 13 in section and forms points 21 diametrically away from one another relative to the central axis of the fibre 11. The shape ratio Ue is less than 3. The fibre 11 is symmetric with respect to its central axis. In section, the line of contact S35 between the portions 13 and 15 has a size greater than 1/8 of the total perimeter p of the fibre 11.
The example in Figure 13 differs from those in the preceding figures in that the fibre 11 has three portions 13, 15a and 15b made of two different materials. The portion 13, of circular section, is made of a first material and the portions 15a and 15b are made of a second material, each being substantially in the form of an isosceles triangle in section. The portion 13 forms the centre of the fibre 11 and the portions 15a and 15b face away from one another relative to the central axis of the fibre 11, their bases 23 being in contact with the portion 13. In section, the contact line S35a between the portions 13 and 15a has a size greater than 1/8 of the perimeter pa of the section formed by the portions 13 and 15a, and the contact line 835b between the portions 13 and 15b has a size greater than 1/8 of the perimeter pt of the section formed by the portions 13 and 15b.
The example in Figure 14 differs from the one in Figure 4 in that the fibre 11 is Y-shaped and has three portions 13, 15 and 17 made of three different materials that each occupy a third of the fibre 11 in section. Each portion 13, 15 and 17 can form one arm of the Y. In a variant, each portion can form a V extending on two arms of the Y. Preferably, the legs of the Y form an angle a equal to 120° between one another, but this does not have to be the case. The contact lines S35, S37 and S57 have a size greater than 1/16 of the respective parameters P35, P37 and P57. The ratio L/e is less than 2.
The example in Figure 15 differs from the one in Figure 14 in that the fibre has two portions 13 and 14 made of two different materials. The first portion 13 forms an arm of the Y and the second portion 15 forms two arms of the Y. In a variant, the first portion 13 may be V-shaped and the second portion 15 Y-shaped.
Figure 16 illustrates a fibre 11 in section in the form of a double blade having two portions 13 and 15 made of two different materials. The first portion 13 has a circular shape and defines the core of the fibre 11, the second portion 15 surrounds the first portion with a central part in the form of a circle and has ends in the form of blades. The ends narrow and are each connected in section to the central part by a straight line 30 and a curve 32 that is concave towards the outside. The concave curve 32 has a radius of curvature R less than or equal to the radius of the central part of the second portion.
In a variant, the fibres may be hollow.
Figure 16 illustrates an applicator having a stem 4 of longitudinal axis X, provided at one end 4a with an applicator member 5 and at the opposite end with a gripping member 6, the applicator member 5 being formed by a bundle of substantially parallel fibres 11 according to the invention.
The invention is not limited to the exemplary embodiments which have just been described, and the characteristics of the various examples can be combined with one another within variants that are not illustrated.
For example, the brush can be subjected to a hot air blower in order to cause at least some of the fibres to deform. The fibres can also be brought into contact with a hot surface. The exposure to a heating means can cause the fibres to curve, on account of the presence of the portions made of different materials.
The expression "having a" should be understood as being synonymous with "comprising at least one", unless specified to the contrary.

Claims

1. Device (1 ) for packaging and applying a makeup product (P), having:
- a reservoir (2) containing the makeup product (P) to be applied, and
- an applicator (3) for applying the makeup product (P), having:
• an applicator member (5), carried by the stem (4), having a plurality of fibres (11), the fibres (11) having a plurality of portions (13, 15, 13a, 13b, 15a, 15b, 17, 19), at least two portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) of which are made of different materials, and the fibres not having, in cross section, an articulated zone defined by one of the portions (13, 15, 13a, 13b, 15a, 15b, 17, 19),
(i) the portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) made of different materials each defining a part of the outer perimeter p of the fibre in section, or
(ii) one of the portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) made of different materials entirely surrounding the other in section and having at least one region that narrows towards the outside.
2. Device according to Claim 1, wherein each fibre (11) has between 2 and 8 of said portions (13, 15, 13a, 13b, 15a, 15b, 17, 19).
3. Device according to Claim 1 or 2, wherein each fibre (11) has between 2 and 8 portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) made of different materials.
4. Device according to any one of Claims 1 to 3, wherein the portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) are co-extruded.
5. Device according to any one of the preceding claims, wherein the portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) have a constant section and extend longitudinally along the entire length of the fibre (11), being in particular continuous along the entire length of the fibre (11).
6. Device according to any one of the preceding claims, wherein said portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) made of different materials have a difference of at least 10 units on the same Shore hardness scale, better still a difference of at least 20 units.
7. Device according to any one of the preceding claims, wherein said portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) each occupy, in cross section, between 20% and 80% of the section formed by the joining of this portion (13; 15; 13a; 13b; 15a; 15b; 17; 19) to an adjacent portion (13; 15: 13a; 13b; 15a; 15b; 17; 19) made of a different material, better still between 30% and 70%, even better still between 40% and 60%.
8. Device according to any one of the preceding claims, wherein two of said portions (13, 35, 13a, 13b, 15a, 15b, 17, 19) made of different materials are separated, in cross section, by a contact line (S35, S35a, S35b, S37, S57, S79, S39) with a length greater than or equal to 1/16, better still greater than or equal to 1/8, of the perimeter (p, p35, p3i, ps7, p?9, P93, Pa, pb) of the area formed by the joining of these portions (13, 15, 13a, 13b, 15a, 15b, 17, 19).
9. Device according to any one of me preceding claims, wherein each fibre (11) has a shape factor L/e less than or equal to 5, better still less than or equal to 4, the shape factor Ue being defined in section by the ratio of the greatest length L of the fibre (11) to the greatest dimension e of the fibre (11) in a direction perpendicular to that of the greatest length L.
10. Device according to any one of the preceding claims, wherein the fibres (1 1) have, in cross section, a region that narrows towards the outside.
11. Device according to any one of the preceding claims, wherein at least two separated portions (13, 15, 13a, 13b, 15a, 15b, 17, 19) are made of one and the same material.
12. Device according to any one of the preceding claims, wherein the applicator (3) has a core formed by a metal strand folded on itself and twisted, the fibres (11) being clamped between the strands of the core.
13. Makeup method comprising the step of applying a makeup product (P) to human keratin materials with the packaging and application device according to any one of the preceding claims.
14. Method for manufacturing a device according to any one of Claims 1 to 12, comprising the step of heating the applicator member (3) so as to bring about the deformation of the fibres (11).
EP15790950.8A 2014-11-06 2015-11-06 Cosmetic applicator having fibres Withdrawn EP3214972A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460727A FR3028153B1 (en) 2014-11-06 2014-11-06 COSMETIC APPLICATOR COMPRISING FIBERS.
PCT/EP2015/075897 WO2016071488A1 (en) 2014-11-06 2015-11-06 Cosmetic applicator having fibres

Publications (1)

Publication Number Publication Date
EP3214972A1 true EP3214972A1 (en) 2017-09-13

Family

ID=52392012

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Application Number Title Priority Date Filing Date
EP15790950.8A Withdrawn EP3214972A1 (en) 2014-11-06 2015-11-06 Cosmetic applicator having fibres

Country Status (6)

Country Link
US (1) US20170318945A1 (en)
EP (1) EP3214972A1 (en)
JP (2) JP2017533067A (en)
CN (1) CN107072381A (en)
FR (1) FR3028153B1 (en)
WO (1) WO2016071488A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10278485B2 (en) * 2016-09-01 2019-05-07 Colgate-Palmolive Company Oral care implement and filament therefor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774269B1 (en) * 1998-01-30 2000-04-07 Oreal BRUSH FOR APPLYING A MAKE-UP PRODUCT, DEVICE THUS EQUIPPED AND MANUFACTURING METHOD
DE19818345A1 (en) * 1998-04-24 1999-10-28 Pedex & Co Gmbh Bristle for brushes, e.g. toothbrushes
US20040112400A1 (en) * 2002-12-16 2004-06-17 Avon Products, Inc. Applicator brush with improved bristles
FR2855379B1 (en) * 2003-05-27 2005-07-29 Oreal PACKAGING AND APPLICATION DEVICE
EP1981468A2 (en) * 2005-12-29 2008-10-22 Avon Products, Inc. Use of non-straight fibers dispersed in a composition and compositions thereof
FR2930874A1 (en) * 2008-04-18 2009-11-13 Ile M V R Soc Civ Soc Civ APPLICATOR DEVICE OF A COSMETIC FLUID OR PASTY PRODUCT, TYPICALLY MASCARA.
US8136536B2 (en) * 2008-09-24 2012-03-20 Elc Management Llc Shape memory polymer mascara brush
DE202012002307U1 (en) * 2012-03-09 2013-06-18 Geka Gmbh Drilled brush with bristles parallel to the distal end

Also Published As

Publication number Publication date
FR3028153B1 (en) 2018-05-04
CN107072381A (en) 2017-08-18
WO2016071488A1 (en) 2016-05-12
JP2017533067A (en) 2017-11-09
JP2020018873A (en) 2020-02-06
FR3028153A1 (en) 2016-05-13
US20170318945A1 (en) 2017-11-09

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