WO2003045186A1 - Cosmetic product dispenser made of barrier material - Google Patents

Cosmetic product dispenser made of barrier material Download PDF

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Publication number
WO2003045186A1
WO2003045186A1 PCT/EP2002/014183 EP0214183W WO03045186A1 WO 2003045186 A1 WO2003045186 A1 WO 2003045186A1 EP 0214183 W EP0214183 W EP 0214183W WO 03045186 A1 WO03045186 A1 WO 03045186A1
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WO
WIPO (PCT)
Prior art keywords
thermoplastic material
layer
evoh
typically
layers
Prior art date
Application number
PCT/EP2002/014183
Other languages
French (fr)
Inventor
Paolo Botto
Erminio Pellegatta
Carmelo Mule
Original Assignee
Benson S.R.L.
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 Benson S.R.L. filed Critical Benson S.R.L.
Priority to US10/497,180 priority Critical patent/US20050058498A1/en
Priority to EP02795179A priority patent/EP1448075A1/en
Priority to AU2002360969A priority patent/AU2002360969A1/en
Publication of WO2003045186A1 publication Critical patent/WO2003045186A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a general shape other than plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Definitions

  • the invention relates to the field of packaging of cosmetics, typically semisolid to fluid or pasty products such as, typically, distributors mascara or lipstick in the form of tubes, sticks or pencils.
  • the cosmetic product intended for making up the eyelashes is called “mascara”, and the packaging of this cosmetic product is called “distributor”.
  • European application No. 96 830631.6 describes a mascara dispenser.
  • a mascara dispenser typically comprises an applicator having a brush and a container forming a reservoir and containing the mascara, the applicator possibly forming a tight cap for the container.
  • the distributor generally comprises a fairly large number of assembled parts.
  • These parts are generally made of molded plastic, typically PNC, PP. EP.
  • a mascara dispenser must ensure a sufficient lifetime for the mascara, in particular, it must imperatively avoid drying the mascara, which must remain sufficiently fluid throughout its lifetime to be able to be correctly applied by the end user.
  • the mascara can dry for two reasons: either because the dispenser is not waterproof, the junction between the cap and the reservoir is not waterproof, or because the walls of the different parts of the dispenser are permeable to volatile components of the mascara which diffuse through these walls, and in particular that of the reservoir.
  • a common way to measure the diffusion rate, and therefore to evaluate the lifespan of the mascara is to measure the weight loss rate (TPP for short) of the mascara dispenser loaded with mascara. The lower the TPP, the longer the life of the dispenser.
  • formulations of mascaras tend to become more and more complex and to include solvents or constituents more and more varied in nature, some of which can be relatively volatile, so as to improve the final performance of the mascara.
  • the formulation of mascaras therefore requires increasingly high barrier properties on the part of the distributor or of the material forming the distributor.
  • the Applicant has therefore sought a means of manufacturing mascara dispensers so as to simultaneously solve all of the problems posed, namely, in addition to the problem of the lifespan mentioned previously, that of the high-speed production of dispensers or parts.
  • distributors that of manufacturing parts that are both relatively small in size and of sufficient mechanical properties, and that of the cost of distributors, and in particular of the lowest possible material cost.
  • the packaging of cosmetic products are articles which can be luxury goods and consumer goods, and as such, subject to the simultaneous requirements of high quality and low production cost.
  • the cosmetic product dispenser typically a mascara
  • the cosmetic product dispenser comprises at least one container forming a reservoir for said cosmetic product, and a cap for sealing said reservoir, optionally provided with an applicator for said cosmetic product, all or part of said tank, and at least one side wall of said tank, being formed by at least one molded part made of thermoplastic material, and is characterized in that said thermoplastic material comprises ENOH and a second thermoplastic material chosen from: PA, PET , PBT, ionomer resin.
  • EVOH which is a copolymer of ethylene and vinyl alcohol, can comprise a percentage of ethylene ranging from 20 to 50% by mole%, and according to the invention, said thermoplastic material can comprise a percentage of EVOH ranging from 10% to 50% by weight, and preferably a percentage of EVOH ranging from 20 to 40% by weight.
  • the Applicant has observed that the means of the invention make it possible to solve all of the problems posed, namely to increase the life of the distributors and / or to reduce the thickness of the walls of the distributor.
  • said thermoplastic material can form a layer of thermoplastic material constituted by a mixture of EVOH and said second thermoplastic material.
  • said thermoplastic material can comprise a percentage of EVOH ranging from 10% to 50% by weight, and a percentage of said second plastic material ranging from 90% to 50% by weight.
  • said percentage of EVOH can range from 20% to 40% by weight, and said percentage of said second plastic material ranging from 80% to 60% by weight
  • said molded part can be formed by known and widely used techniques for forming parts, typically by extrusion-molding or by injection-molding, or even by extrusion blow molding or by injection blow molding in the concave or hollow parts.
  • said thermoplastic material can form a multilayer material with at least two layers of plastic material, and typically with two layers: an inner layer consisting of a mixture of EVOH and said second thermoplastic material, an outer layer formed by said second thermoplastic material.
  • said multilayer material can comprise at least three layers of plastic material, and typically three layers of thermoplastic material: a central layer consisting of a mixture of EVOH and said second thermoplastic material, and, on either side of said central layer, an inner layer and an outer layer, at least one of these layers being constituted by said second thermoplastic material, one of the inner or outer layers being able to be constituted by a third thermoplastic material or by a second thermoplastic material different from the previous one.
  • At least one face or one side of said layer constituted by said mixture of EVOH can be covered with an adhesive bonding layer (called "tie layer” in English), so as to form a multilayer material typically comprising from 3 to 5 layers, said adhesive layer being chosen, as known per se, to make two different layers adhesive to each other.
  • an adhesive bonding layer called "tie layer” in English
  • said thermoplastic material can form a multilayer material with three layers: a layer constituted by said mixture of EVOH and said second thermoplastic material, an adhesive bonding layer, and a layer typically constituted by said second thermoplastic material or by said third thermoplastic material.
  • said percentage of EVOH in said mixture can range from 10% to 90% by weight, said percentage of said second plastic material in said thermoplastic material ranging from 80% to 60% by weight.
  • said multilayer material can be a material with at least five layers, three layers of plastic material and two bonding layers: a layer, typically central, consisting of a layer of EVOH, and, on either side of said central layer, an inner layer and an outer layer, inner and outer layers constituted by said second thermoplastic material and / or a third thermoplastic material, said central layer and said inner and outer layers comprising between them a bonding adhesive layer.
  • thermoplastic material to which reference is made in the foregoing can typically be chosen from PE or PP.
  • said molded part can be formed by co-extrusion of said multilayer material, followed by molding or blowing, or by co-injection.
  • the PA can preferably be chosen from amorphous PAs, totally or partially aromatic PAs.
  • At least the part or parts forming the reservoir, or what takes the place of a container for said cosmetic product is formed from part (s) molded from material comprising EVOH and said second material. thermoplastic.
  • the entire distributor at least for the part (s) made of thermoplastic material forming a wall, may be made of a material comprising EVOH and said second thermoplastic material, said reservoir and said cap constituting said molded parts.
  • said cosmetic product can be mascara.
  • said cap may include a brush as an applicator of said cosmetic product.
  • Another object of the invention consists of the use of a thermoplastic material comprising EVOH and a second thermoplastic material chosen from PA, PET, PBT, or an ionomer resin to form all or part of a dispenser.
  • a thermoplastic material comprising EVOH and a second thermoplastic material chosen from PA, PET, PBT, or an ionomer resin
  • PA polyethylene glycol
  • thermoplastic material consists of a single layer (so-called single-layer material), or by co-extrusion blow molding when said thermoplastic material comprises more than '' one layer (so-called multi-layer material).
  • thermoplastic material these are mixtures of EVOH and of said second thermoplastic material, namely: PA + EVOH, PET + EVOH, PBT + EVOH, Ionomer resin + EVOH, the EVOH content by weight varying from 10 to 50% by weight, the corresponding tests being indicated by crosses in bold type in the following table:
  • multilayer thermoplastic material At least one layer of "ME” was used, defined as seen in the previous table. In certain cases, and in particular when one or two layers SM of second plastic material are used, it has been found advantageous to use a layer of ME as rich as possible in EVOH, as long as preserving with an EVOH content by weight greater than 50 % When present, the adhesive bonding layers have been symbolized by "TL” for "tie layer”.
  • Said second plastics have been generically represented by "SM”.
  • SM Said second plastics
  • PE or PP plastics
  • TM third plastics
  • the ME layer has been replaced by a 100% EVOH layer.
  • ME / SM Two-layer structures: ME / SM, ME typically comprising, but not necessarily, the material SM forming the second layer, so that a bonding layer TL is not necessary.
  • Three-layer structures they are of the ME / TL / TM type, or else of the SM / ME / SM type or possibly of the SM / ME / SM 'type, SM' designating a second thermoplastic material different from SM.
  • Five-layer structures they are of the TM / TL / ME / TL / TM type (or TM '- TM' designating a third thermoplastic material different from TM), or of the SM or TM / TL / EVOH / TL type / SM or TM, EVOH designating a layer of 100% EVOH.
  • Six-layer structure it is a five-layer structure to which a layer of recycled plastic, denoted "R", typically a recycling polyolefin, has been added, so as to reduce the final material cost.
  • R typically a recycling polyolefin

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Cosmetics (AREA)

Abstract

The invention concerns a cosmetic product dispenser, typically mascara, comprising at least a container forming a reservoir for said cosmetic product, and a cap for sealed closure of said reservoir, optionally provided with an applicator for said cosmetic product, all or part of said reservoir, and at least a side wall of said reservoir, being formed by at least a thermoplastic material moulded part, and characterized in that said thermoplastic material includes EVOH and a second thermoplastic material selected among: PA, PET, PBT, ionomer resin.

Description

DISTRIBUTEUR DE PRODUIT COSMETIQUE EN MATERIAU BARRIERECOSMETIC DISPENSER IN BARRIER MATERIAL
DOMAINE DE L'INVENTIONFIELD OF THE INVENTION
L'invention concerne le domaine des' emballages de produits cosmétiques, typiquement des produits fluides à semi-solides ou pâteux, tels que, typiquement, des distributeurs de mascara ou de rouge à lèvre sous forme de tubes, de sticks ou de crayons.The invention relates to the field of packaging of cosmetics, typically semisolid to fluid or pasty products such as, typically, distributors mascara or lipstick in the form of tubes, sticks or pencils.
ETAT DE LA TECHNIQUESTATE OF THE ART
On connaît déjà de nombreux distributeurs de mascara. On appelle "mascara" le produit cosmétique destiné au maquillage des cils, et on appelle "distributeur" l'emballage de ce produit cosmétique.Many distributors of mascara are already known. The cosmetic product intended for making up the eyelashes is called "mascara", and the packaging of this cosmetic product is called "distributor".
A titre d'exemple, la demande européenne No 96 830631.6 décrit un distributeur de mascara.As an example, European application No. 96 830631.6 describes a mascara dispenser.
Un distributeur de mascara comprend typiquement un applicateur doté d'une brosse et un récipient formant réservoir et contenant le mascara, l'applicateur pouvant former un capuchon étanche pour le récipient.A mascara dispenser typically comprises an applicator having a brush and a container forming a reservoir and containing the mascara, the applicator possibly forming a tight cap for the container.
Comme illustré dans cette demande européenne, le distributeur comprend généralement un assez grand nombre de pièces assemblées.As illustrated in this European application, the distributor generally comprises a fairly large number of assembled parts.
Ces pièces sont généralement en matière plastique moulée, typiquement en PNC, PP. PE.These parts are generally made of molded plastic, typically PNC, PP. EP.
PROBLEMES POSESPROBLEMS POSED
Un distributeur de mascara doit assurer une durée de vie suffisante au mascara, en particulier, il doit éviter impérativement le séchage du mascara, qui doit rester suffisamment fluide durant toute sa durée de vie pour pouvoir être correctement appliqué par l'utilisatrice finale.A mascara dispenser must ensure a sufficient lifetime for the mascara, in particular, it must imperatively avoid drying the mascara, which must remain sufficiently fluid throughout its lifetime to be able to be correctly applied by the end user.
Le mascara peut sécher pour deux raisons : soit parce que le distributeur n'est pas étanche, la jonction entre le capuchon et le réservoir n'étant pas étanche, soit parce que les parois des différentes pièces du distributeur sont perméables aux composants volatils du mascara qui diffusent à travers ces parois, et notamment celle du réservoir. Une manière courante de mesurer le taux de diffusion, et donc d'évaluer la durée de vie du mascara, est de mesurer le taux de perte pondérale (TPP en abrégé) du distributeur de mascara chargé en mascara. Plus le TPP est faible et plus grande est la durée de vie du distributeur.The mascara can dry for two reasons: either because the dispenser is not waterproof, the junction between the cap and the reservoir is not waterproof, or because the walls of the different parts of the dispenser are permeable to volatile components of the mascara which diffuse through these walls, and in particular that of the reservoir. A common way to measure the diffusion rate, and therefore to evaluate the lifespan of the mascara, is to measure the weight loss rate (TPP for short) of the mascara dispenser loaded with mascara. The lower the TPP, the longer the life of the dispenser.
Les fabricants de distributeurs de mascara ont déjà tenté de réduire le TPP en augmentant l'épaisseur de paroi du distributeur, mais cette solution, outre qu'elle peut être peu efficace pour certaines compositions de mascara, conduit d'une part à des coûts de matière élevés, et d'autre part à des distributeurs de faible contenance. De plus, il n'est pas toujours possible, compte tenu des limitations des procédés de fabrication, d'obtenir l'épaisseur de paroi qui serait nécessaire pour obtenir une barrière suffisante.Manufacturers of mascara dispensers have already attempted to reduce the TPP by increasing the wall thickness of the dispenser, but this solution, apart from being ineffective for certain mascara compositions, leads on the one hand to costs of high material, and secondly to distributors of low capacity. In addition, it is not always possible, given the limitations of the manufacturing methods, to obtain the wall thickness which would be necessary to obtain a sufficient barrier.
Par ailleurs, les formulations des mascaras tendent à devenir de plus en plus complexes et à comprendre des solvants ou des constituants de plus en plus variés en nature, certains pouvant être relativement volatils, de manière à améliorer la performance finale du mascara. La formulation des mascaras exige donc des propriétés barrières de plus en plus élevées de la part du distributeur ou du matériau formant le distributeur.Furthermore, the formulations of mascaras tend to become more and more complex and to include solvents or constituents more and more varied in nature, some of which can be relatively volatile, so as to improve the final performance of the mascara. The formulation of mascaras therefore requires increasingly high barrier properties on the part of the distributor or of the material forming the distributor.
La demanderesse a donc recherché un moyen de fabriquer des distributeurs de mascara de manière à résoudre simultanément l'ensemble des problèmes posés, à savoir, outre le problème de la durée de vie mentionné précédemment, celui de la fabrication à haute cadence de distributeurs ou pièces de distributeurs, celui de la fabrication de pièces à la fois de dimensions relativement petites et de caractéristiques mécaniques suffisantes, et celui du coût des distributeurs, et notamment du coût matière le plus bas possible. En effet, les emballages de produits cosmétiques sont des articles qui peuvent être des articles de luxe et des articles de grande consommation, et à ce titre, soumis aux exigences simultanées de qualité élevée et de faible coût de production.The Applicant has therefore sought a means of manufacturing mascara dispensers so as to simultaneously solve all of the problems posed, namely, in addition to the problem of the lifespan mentioned previously, that of the high-speed production of dispensers or parts. distributors, that of manufacturing parts that are both relatively small in size and of sufficient mechanical properties, and that of the cost of distributors, and in particular of the lowest possible material cost. Indeed, the packaging of cosmetic products are articles which can be luxury goods and consumer goods, and as such, subject to the simultaneous requirements of high quality and low production cost.
DESCRIPTION DE L'INVENTIONDESCRIPTION OF THE INVENTION
Selon l'invention, le distributeur de produit cosmétique, typiquement de mascara, comprend au moins un récipient formant un réservoir pour ledit produit cosmétique, et un capuchon pour la fermeture étanche dudit réservoir, éventuellement doté d'un applicateur dudit produit cosmétique, tout ou partie dudit réservoir, et au moins une paroi latérale dudit réservoir, étant formé par au moins une pièce moulée en matière thermoplastique, et est caractérisé en ce que ladite matière thermoplastique comprend de l'ENOH et une seconde matière thermoplastique choisie parmi : PA, PET, PBT, résine ionomère. L'EVOH, qui est un copolymère d'éthylène et d'alcool vinylique, peut comprendre un pourcentage d'éthylène allant de 20 à 50 % en mole %, et selon l'invention, ladite matière thermoplastique peut comprendre un pourcentage d'EVOH allant de 10 % à 50% en poids, et de préférence un pourcentage d'EVOH allant de 20 à 40 % en poids.According to the invention, the cosmetic product dispenser, typically a mascara, comprises at least one container forming a reservoir for said cosmetic product, and a cap for sealing said reservoir, optionally provided with an applicator for said cosmetic product, all or part of said tank, and at least one side wall of said tank, being formed by at least one molded part made of thermoplastic material, and is characterized in that said thermoplastic material comprises ENOH and a second thermoplastic material chosen from: PA, PET , PBT, ionomer resin. EVOH, which is a copolymer of ethylene and vinyl alcohol, can comprise a percentage of ethylene ranging from 20 to 50% by mole%, and according to the invention, said thermoplastic material can comprise a percentage of EVOH ranging from 10% to 50% by weight, and preferably a percentage of EVOH ranging from 20 to 40% by weight.
La demanderesse a observé que les moyens de l'invention permettaient de résoudre l'ensemble des problèmes posés, à savoir d'augmenter la durée de vie des distributeurs et/ou de diminuer l'épaisseur des parois du distributeur.The Applicant has observed that the means of the invention make it possible to solve all of the problems posed, namely to increase the life of the distributors and / or to reduce the thickness of the walls of the distributor.
Selon une première modalité de l'invention, ladite matière thermoplastique peut former une couche de matière thermoplastique constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique.According to a first embodiment of the invention, said thermoplastic material can form a layer of thermoplastic material constituted by a mixture of EVOH and said second thermoplastic material.
Selon cette modalité de l'invention, ladite matière thermoplastique peut comprendre un pourcentage d'EVOH allant de 10 % à 50% en poids, et un pourcentage de ladite seconde matière plastique allant de 90 % à 50 % en poids. De préférence, ledit pourcentage d'EVOH peut aller de 20 % à 40% en poids, et ledit pourcentage de ladite seconde matière plastique allant de 80 % à 60 % en poids Dans cette modalité de l'invention, ladite pièce moulée peut être formée par les techniques connues et largement utilisées de formation de pièces, typiquement par extrusion-moulage ou par injection-moulage, ou encore par extrusion-soufflage ou par injection-soufflage dans le cas de pièces concaves ou creuses.According to this embodiment of the invention, said thermoplastic material can comprise a percentage of EVOH ranging from 10% to 50% by weight, and a percentage of said second plastic material ranging from 90% to 50% by weight. Preferably, said percentage of EVOH can range from 20% to 40% by weight, and said percentage of said second plastic material ranging from 80% to 60% by weight In this embodiment of the invention, said molded part can be formed by known and widely used techniques for forming parts, typically by extrusion-molding or by injection-molding, or even by extrusion blow molding or by injection blow molding in the concave or hollow parts.
Selon une seconde modalité de l'invention, ladite matière thermoplastique peut former un matériau multicouche à au moins deux couches de matière plastique, et typiquement à deux couches : une couche intérieure étant constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique, une couche extérieure constituée par ladite seconde matière thermoplastique.According to a second embodiment of the invention, said thermoplastic material can form a multilayer material with at least two layers of plastic material, and typically with two layers: an inner layer consisting of a mixture of EVOH and said second thermoplastic material, an outer layer formed by said second thermoplastic material.
Selon une variante de l'invention, lequel ledit matériau multicouche peut comprendre au moins trois couches de matière plastique, et typiquement trois couches de matière thermoplastique : une couche centrale étant constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique, et, de part et d'autre de ladite couche centrale, une couche intérieure et une couche extérieure, au moins une de ces couches étant constituée par ladite seconde matière thermoplastique, une des couches intérieure ou extérieure pouvant être constituée par une troisième matière thermoplastique ou par une seconde matière thermoplastique différente de la précédente.According to a variant of the invention, which said multilayer material can comprise at least three layers of plastic material, and typically three layers of thermoplastic material: a central layer consisting of a mixture of EVOH and said second thermoplastic material, and, on either side of said central layer, an inner layer and an outer layer, at least one of these layers being constituted by said second thermoplastic material, one of the inner or outer layers being able to be constituted by a third thermoplastic material or by a second thermoplastic material different from the previous one.
Au moins une face ou un côté de ladite couche constituée par ledit mélange d'EVOH peut être recouvert d'une couche adhésive de liaison (appelée "tie layer" en anglais), de manière à former un matériau multicouche comprenant typiquement de 3 à 5 couches, ladite couche adhésive étant choisie, comme connu en soi, pour rendre adhésives l'une à l'autre deux couches différentes.At least one face or one side of said layer constituted by said mixture of EVOH can be covered with an adhesive bonding layer (called "tie layer" in English), so as to form a multilayer material typically comprising from 3 to 5 layers, said adhesive layer being chosen, as known per se, to make two different layers adhesive to each other.
Selon une autre variante de cette modalité, ladite matière thermoplastique peut former un matériau multicouche à trois couches : une couche constituée par ledit mélange d'EVOH et de ladite seconde matière thermoplastique, une couche adhésive de liaison, et une couche constituée typiquement par ladite seconde matière thermoplastique ou par ladite troisième matière thermoplastique.According to another variant of this method, said thermoplastic material can form a multilayer material with three layers: a layer constituted by said mixture of EVOH and said second thermoplastic material, an adhesive bonding layer, and a layer typically constituted by said second thermoplastic material or by said third thermoplastic material.
Selon l'invention, ledit pourcentage d'EVOH dans ledit mélange peut aller de 10 % à 90% en poids, ledit pourcentage de ladite seconde matière plastique dans ladite matière thermoplastique allant de 80 % à 60 % en poids.According to the invention, said percentage of EVOH in said mixture can range from 10% to 90% by weight, said percentage of said second plastic material in said thermoplastic material ranging from 80% to 60% by weight.
Selon une troisième modalité de l'invention, ledit matériau multicouche peut être un matériau à au moins cinq couches, trois couches de matière plastique et deux couches de liaison : une couche, typiquement centrale, étant constituée par une couche d'EVOH, et, de part et d'autre de ladite couche centrale, une couche intérieure et une couche extérieure, couches intérieure et extérieure constituées par ladite seconde matière thermoplastique et/ou une troisième matière thermoplastique, ladite couche centrale et lesdites couches interne et externe comprenant entre elles une couche adhésive de liaison.According to a third embodiment of the invention, said multilayer material can be a material with at least five layers, three layers of plastic material and two bonding layers: a layer, typically central, consisting of a layer of EVOH, and, on either side of said central layer, an inner layer and an outer layer, inner and outer layers constituted by said second thermoplastic material and / or a third thermoplastic material, said central layer and said inner and outer layers comprising between them a bonding adhesive layer.
Ladite troisième matière thermoplastique à laquelle il est fait référence dans ce qui précède peut être choisie typiquement parmi le PE ou le PP.Said third thermoplastic material to which reference is made in the foregoing can typically be chosen from PE or PP.
Dans cette modalité de l'invention, ladite pièce moulée peut être formée par co-extrusion dudit matériau multicouche, suivie d'un moulage ou d'un soufflage, ou par co-injection.In this embodiment of the invention, said molded part can be formed by co-extrusion of said multilayer material, followed by molding or blowing, or by co-injection.
Quelle que soit la modalité de l'invention, lorsque ladite seconde matière thermoplastique est un PA, le PA peut être choisi de préférence parmi les PA amorphes, les PA totalement ou partiellement aromatiques.Whatever the method of the invention, when said second thermoplastic material is a PA, the PA can preferably be chosen from amorphous PAs, totally or partially aromatic PAs.
Selon l'invention, au moins la ou les pièces formant le réservoir, ou ce qui tient lieu de contenant pour ledit produit cosmétique, est formé de pièce(s) moulée(s) en matériau comprenant de l'EVOH et de ladite seconde matière thermoplastique.According to the invention, at least the part or parts forming the reservoir, or what takes the place of a container for said cosmetic product, is formed from part (s) molded from material comprising EVOH and said second material. thermoplastic.
Mais l'ensemble du distributeur, du moins pour la/les partie(s) en matériau thermoplastique formant paroi, peut être constitué d'un matériau comprenant de l'EVOH et de ladite seconde matière thermoplastique, ledit réservoir et ledit capuchon constituant lesdites pièces moulées.However, the entire distributor, at least for the part (s) made of thermoplastic material forming a wall, may be made of a material comprising EVOH and said second thermoplastic material, said reservoir and said cap constituting said molded parts.
Selon un mode préféré mais non exclusif de l'invention, ledit produit cosmétique peut être du mascara. Dans ce cas, ledit capuchon peut comprendre une brosse comme applicateur dudit produit cosmétique.According to a preferred but not exclusive mode of the invention, said cosmetic product can be mascara. In this case, said cap may include a brush as an applicator of said cosmetic product.
Un autre objet de l'invention est constitué par l'utilisation d'une matière thermoplastique comprenant de l'EVOH et une seconde matière thermoplastique choisie parmi un PA, PET, PBT, ou une résine ionomère pour former tout ou partie d'un distributeur de produit cosmétique selon l'invention, et plus particulièrement pour former un distributeur de produits cosmétiques typiquement fluides à semi-solides et à composant volatil, choisi typiquement parmi : les distributeurs de mascara, de vernis à ongles, de rouge à lèvres, de produits cosmétiques en raisin, bâton ou crayon, notamment destinés au maquillage du visage ou des ongles.Another object of the invention consists of the use of a thermoplastic material comprising EVOH and a second thermoplastic material chosen from PA, PET, PBT, or an ionomer resin to form all or part of a dispenser. of cosmetic product according to the invention, and more particularly to form a dispenser of typically fluid cosmetic products with semi-solids and with volatile component, typically chosen from: distributors of mascara, nail polish, lipstick, products grape, stick or pencil cosmetics, in particular for making up the face or nails.
EXEMPLES DE REALISATIONEXAMPLES OF REALIZATION
On a fabriqué des distributeurs de mascara, corps et capuchon, par injection-moulage ou injection soufflage lorsque la matière thermoplastique est constituée par une seule couche (matière dite mono-couche), ou par co-extrusion soufflage lorsque ladite matière thermoplastique comprend plus d'une couche (matière dite multi-couche).We made mascara dispensers, body and cap, by injection-molding or blow-molding injection when the thermoplastic material consists of a single layer (so-called single-layer material), or by co-extrusion blow molding when said thermoplastic material comprises more than '' one layer (so-called multi-layer material).
I - Exemples de matière thermoplastique mono-couche : il s'agit de mélanges d'EVOH et de ladite seconde matière thermoplastique, soit : PA+EVOH, PET+EVOH, PBT+EVOH, Résine ionomère +EVOH, la teneur pondérale en EVOH variant de 10 à 50% en poids, les essais correspondants étant indiqués en par des croix en caractère gras sur le tableau suivant :I - Examples of single-layer thermoplastic material: these are mixtures of EVOH and of said second thermoplastic material, namely: PA + EVOH, PET + EVOH, PBT + EVOH, Ionomer resin + EVOH, the EVOH content by weight varying from 10 to 50% by weight, the corresponding tests being indicated by crosses in bold type in the following table:
% EVOH Seconde matière plastique% EVOH Second plastic material
PA PET PBT Ionomère PA PET PBT Ionomer
Figure imgf000008_0001
Figure imgf000008_0001
On a observé que les propriétés mécaniques de ces mélanges (désignés symboliquement par "MELANGE EVOH" ou "ME" en abrégé dans ce qui suit) diminuaient avec une augmentation de la teneur en EVOH, alors que les propriétés de barrière aux produits volatils du mascara augmentaient, de sorte que, généralement, un bon compromis entre les propriétés mécaniques et le propriétés de barrière a été obtenu typiquement pour une teneur pondérale en EVOH au plus égale à 50% (essais en caractère gras).It has been observed that the mechanical properties of these mixtures (symbolically designated by "MIXTURE EVOH" or "ME" for short in the following) decrease with an increase in the content of EVOH, while the barrier properties to volatile products of mascara increased, so that, generally, a good compromise between the mechanical properties and the barrier properties was typically obtained for a weight content of EVOH at most equal to 50% (tests in bold character).
II - Exemples de matière thermoplastique multicouche : On a utilisé au moins une couche de "ME" définie comme vu dans le tableau précédent. Dans certains cas, et notamment lorsqu'une ou deux couches SM de seconde matières plastique sont utilisés, il a été trouvé avantageux d'utiliser une couche de ME aussi riche que possible en EVOH, tant en conservant à teneur pondérale en EVOH supérieure à 50% Quand elles sont présentes, les couches adhésives de liaison ont été symbolisées par "TL" pour "tie layer".II - Examples of multilayer thermoplastic material: At least one layer of "ME" was used, defined as seen in the previous table. In certain cases, and in particular when one or two layers SM of second plastic material are used, it has been found advantageous to use a layer of ME as rich as possible in EVOH, as long as preserving with an EVOH content by weight greater than 50 % When present, the adhesive bonding layers have been symbolized by "TL" for "tie layer".
Lesdites secondes matières plastiques (PA, PET, PBT, ionomère) ont été représentées génériquement par "SM". Quand d'autres matières plastiques ont été utilisées, par exemple le PE ou le PP, elles ont été appelées "troisièmes matières plastiques" et ont été représentées génériquement par "TM". Dans certains cas, et notamment lorsqu'une ou deux couches SM de seconde matières plastique sont utilisées, il a été trouvé avantageux d'utiliser une couche de ME aussi riche que possible en EVOH, tant en conservant par ailleurs une adhérence entre les couches SE et SM suffisante, de manière à éviter la présence de couches de liaison TL. Dans d'autres cas, la couche de ME a été remplacée par une couche d'EVOH 100%.Said second plastics (PA, PET, PBT, ionomer) have been generically represented by "SM". When other plastics have been used, for example PE or PP, they have been called "third plastics" and have been generically represented by "TM". In some cases, and in particular when one or two layers SM of second plastic material are used, it has been found advantageous to use a layer of ME as rich in EVOH as possible, while also retaining adhesion between the layers SE and SM sufficient, so as to avoid the presence of TL binding layers. In other cases, the ME layer has been replaced by a 100% EVOH layer.
La structure d'une matière multicouche a été représentée dans ce qui suit par la succession des couches, chaque couche étant séparée de la suivante par "/".The structure of a multilayer material has been shown in the following by the succession of layers, each layer being separated from the next by "/".
II-A Structures à deux couches : ME / SM, ME comprenant typiquement, mais non obligatoirement la matière SM formant la seconde couche, de sorte qu'une couche de liaison TL n'est pas nécessaire.II-A Two-layer structures: ME / SM, ME typically comprising, but not necessarily, the material SM forming the second layer, so that a bonding layer TL is not necessary.
II-B Structures à trois couches : elles sont du type ME / TL / TM, ou bien du type SM / ME / SM ou éventuellement du type SM / ME / SM', SM' désignant une seconde matière thermoplastique différente de SM.II-B Three-layer structures: they are of the ME / TL / TM type, or else of the SM / ME / SM type or possibly of the SM / ME / SM 'type, SM' designating a second thermoplastic material different from SM.
II-C Structures à quatre couches : elles sont du type TM / TL / ME / SMII-C Four-layer structures: they are of the TM / TL / ME / SM type
II-D Structures à cinq couches : elles sont du type TM / TL / ME / TL / TM (ou TM' - TM' désignant une troisième matière thermoplastique différente de TM), ou du type SM ou TM / TL / EVOH / TL / SM ou TM, EVOH désignant une couche d'EVOH 100%.II-D Five-layer structures: they are of the TM / TL / ME / TL / TM type (or TM '- TM' designating a third thermoplastic material different from TM), or of the SM or TM / TL / EVOH / TL type / SM or TM, EVOH designating a layer of 100% EVOH.
II-E Structure à six couches : c'est une structure à cinq couches à laquelle a été ajoutée une couche de matière plastique recyclée, notée "R", typiquement une polyoléfine de recyclage, de manière à diminuer le coût matière final. Par exemple la structure : TM /II-E Six-layer structure: it is a five-layer structure to which a layer of recycled plastic, denoted "R", typically a recycling polyolefin, has been added, so as to reduce the final material cost. For example the structure: TM /
TL / ME / TL / R / TM.TL / ME / TL / R / TM.
AVANTAGES DE L'INVENTION La demanderesse a observé, suite aux essais qu'elle avait effectué, notamment à partir de mélanges d'EVOH et de PA amorphe, et de mélanges d'EVOH et de résine ionomère (Surlyn ®), la possibilité d'augmenter considérablement la durée de vie notamment des mascaras, ou encore des produits pour les soins des ongles, et plus généralement de toute composition cosmétique comprenant un constituant volatil, par diminution du taux de perte pondérale résultant de la diffusion des constituants les plus volatils, typiquement des solvants organiques ou composés hydrocarbonés hydrophobes à polarité faible ou nulle, et/ou de diminuer l'épaisseur des parois, sans avoir à modifier signifïcativement les équipements usuels ou les cadences de production, et par ailleurs sans avoir à augmenter signifïcativement le coût des produits fabriqués. ADVANTAGES OF THE INVENTION The Applicant has observed, following the tests it had carried out, in particular from mixtures of EVOH and amorphous PA, and mixtures of EVOH and ionomer resin (Surlyn®), the possibility of considerably increasing the duration for life, in particular mascaras, or products for nail care, and more generally any cosmetic composition comprising a volatile constituent, by reducing the rate of weight loss resulting from the diffusion of the most volatile constituents, typically organic solvents or hydrophobic hydrocarbon compounds of low or zero polarity, and / or of reducing the thickness of the walls, without having to significantly modify the usual equipment or production rates, and moreover without having to significantly increase the cost of the products manufactured.

Claims

REVENDICATIONS
1. Distributeur de produit cosmétique, typiquement de mascara, comprenant au moins un récipient formant un réservoir pour ledit produit cosmétique, et un capuchon pour la fermeture étanche dudit réservoir, éventuellement doté d'un applicateur dudit produit cosmétique, tout ou partie dudit réservoir, et au moins une paroi latérale dudit réservoir, étant formés par au moins une pièce moulée en matière thermoplastique, caractérisé en ce que ladite matière thermoplastique est un mélange comprenant de l'EVOH et une seconde matière thermoplastique choisie parmi : PA, PET, PBT, résine ionomère, la teneur pondérale en EVOH dans ledit mélange étant d'au plus 50%.1. Cosmetic product dispenser, typically a mascara, comprising at least one container forming a reservoir for said cosmetic product, and a cap for sealing said reservoir, optionally provided with an applicator of said cosmetic product, all or part of said reservoir, and at least one side wall of said tank, being formed by at least one molded part made of thermoplastic material, characterized in that said thermoplastic material is a mixture comprising EVOH and a second thermoplastic material chosen from: PA, PET, PBT, ionomer resin, the weight content of EVOH in said mixture being at most 50%.
2. Distributeur selon la revendication 1 dans lequel l'EVOH comprend un pourcentage d'éthylène allant de 20 à 50 % en mole %.2. The dispenser of claim 1 wherein the EVOH comprises a percentage of ethylene ranging from 20 to 50% by mole%.
3. Distributeur selon une quelconque des revendications 1 à 2 dans lequel ladite matière thermoplastique comprend un pourcentage d'EVOH allant de 10 % à 50% en poids.3. Dispenser according to any one of claims 1 to 2 wherein said thermoplastic material comprises a percentage of EVOH ranging from 10% to 50% by weight.
4. Distributeur selon une quelconque des revendications 1 à 3 dans lequel ladite matière thermoplastique forme une couche de matière thermoplastique constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique.4. Dispenser according to any one of claims 1 to 3 wherein said thermoplastic material forms a layer of thermoplastic material consisting of a mixture of EVOH and said second thermoplastic material.
5. Distributeur selon la revendication 4 dans lequel ladite matière thermoplastique comprend un pourcentage d'EVOH allant de 10 % à 50% en poids, et un pourcentage de ladite seconde matière plastique allant de 90 % à 50 % en poids.5. The dispenser of claim 4 wherein said thermoplastic material comprises a percentage of EVOH ranging from 10% to 50% by weight, and a percentage of said second plastic material ranging from 90% to 50% by weight.
6. Distributeur selon la revendication 5 dans lequel ledit pourcentage d'EVOH va de 20 % à 40% en poids, et ledit pourcentage de ladite seconde matière plastique allant de 80 % à 60 % en poids. 6. The dispenser of claim 5 wherein said percentage of EVOH ranges from 20% to 40% by weight, and said percentage of said second plastic material ranging from 80% to 60% by weight.
7. Distributeur selon une quelconque des revendications 1 à 6 dans lequel ladite pièce moulée est formée typiquement par extrusion-moulage ou par injection-moulage, ou par extrusion-soufflage dudit mélange.7. A dispenser according to any one of claims 1 to 6 wherein said molded part is typically formed by extrusion-molding or by injection-molding, or by extrusion-blowing of said mixture.
8. Distributeur selon une quelconque des revendications 1 à 3 dans lequel ladite matière thermoplastique forme un matériau multicouche à au moins deux couches de matière plastique, et typiquement à deux couches : une couche, typiquement intérieure, étant constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique, une couche, typiquement extérieure, étant constituée typiquement par ladite seconde matière thermoplastique.8. A dispenser according to any one of claims 1 to 3 in which said thermoplastic material forms a multilayer material with at least two layers of plastic material, and typically with two layers: a layer, typically interior, consisting of a mixture of EVOH and of said second thermoplastic material, a layer, typically external, typically consisting of said second thermoplastic material.
9. Distributeur selon la revendication 8 dans lequel ledit matériau multicouche comprend au moins trois couches de matière plastique, et typiquement trois couches de matière plastique : une couche, typiquement centrale, étant constituée par un mélange d'EVOH et de ladite seconde matière thermoplastique, et, de part et d'autre de ladite couche centrale, une couche intérieure et une couche extérieure, au moins une de ces couches étant constituée par ladite seconde matière thermoplastique, une des couches intérieure ou extérieure pouvant être constituée par une troisième matière thermoplastique.9. The dispenser according to claim 8, in which said multilayer material comprises at least three layers of plastic material, and typically three layers of plastic material: a layer, typically central, consisting of a mixture of EVOH and said second thermoplastic material, and, on either side of said central layer, an inner layer and an outer layer, at least one of these layers being made up of said second thermoplastic material, one of the inner or outer layers being able to be made up of a third thermoplastic material.
10. Distributeur selon une quelconque des revendication 8 à 9 dans lequel au moins une face ou un côté de ladite couche constituée par ledit mélange d'EVOH est recouvert d'une couche adhésive de liaison, de manière à former un matériau multicouche comprenant typiquement de 3 à 5 couches.10. Dispenser according to any one of claims 8 to 9 in which at least one face or one side of said layer formed by said mixture of EVOH is covered with an adhesive bonding layer, so as to form a multilayer material typically comprising 3 to 5 layers.
11. Distributeur selon une quelconque des revendications 8 à 10 dans lequel ladite matière thermoplastique forme un matériau multicouche à trois couches : une couche constituée par ledit mélange d'EVOH et de ladite seconde matière thermoplastique, une couche adhésive de liaison, et une couche constituée typiquement par ladite seconde matière thermoplastique ou par ladite troisième matière thermoplastique. 11. A dispenser according to any one of claims 8 to 10 wherein said thermoplastic material forms a three-layer multilayer material: a layer constituted by said mixture of EVOH and said second thermoplastic material, an adhesive bonding layer, and a layer constituted typically by said second thermoplastic material or by said third thermoplastic material.
12. Distributeur selon une quelconque des revendications 8 à 11 dans lequel ledit pourcentage d'EVOH dans ledit mélange va de 10 % à 90% en poids, ledit pourcentage de ladite seconde matière plastique dans ladite matière thermoplastique allant de 80 % à 60 % en poids.12. Dispenser according to any one of claims 8 to 11 wherein said percentage of EVOH in said mixture ranges from 10% to 90% by weight, said percentage of said second plastic material in said thermoplastic material ranging from 80% to 60% by weight weight.
13. Distributeur selon une quelconque des revendications 1 à 3 dans lequel ledit matériau multicouche est un matériau à cinq couches, trois couches de matière plastique et deux couches de liaison : une couche, typiquement centrale, étant constituée par une couche d'EVOH, et, de part et d'autre de ladite couche centrale, une couche intérieure et une couche extérieure, couches intérieure et extérieure constituées par ladite seconde matière thermoplastique et/ou une troisième matière thermoplastique, ladite couche centrale et lesdites couches interne et externe comprenant entre elles une couche adhésive de liaison.13. A dispenser according to any one of claims 1 to 3 in which said multilayer material is a material with five layers, three layers of plastic material and two bonding layers: a layer, typically central, consisting of a layer of EVOH, and , on either side of said central layer, an inner layer and an outer layer, inner and outer layers constituted by said second thermoplastic material and / or a third thermoplastic material, said central layer and said inner and outer layers comprising between them a bonding adhesive layer.
14. Distributeur selon une quelconque des revendications 9 à 13 dans lequel ladite troisième matière thermoplastique est choisie parmi le PE ou le PP.14. Dispenser according to any one of claims 9 to 13 wherein said third thermoplastic material is chosen from PE or PP.
15. Distributeur selon une quelconque des revendications 8 à 14 dans lequel ladite pièce moulée est formée par co-extrusion dudit matériau multicouche, suivie d'un moulage ou d'un soufflage ou par co-injection.15. A dispenser according to any one of claims 8 to 14 wherein said molded part is formed by co-extrusion of said multilayer material, followed by molding or blowing or by co-injection.
16. Distributeur selon une quelconque des revendications 1 à 15 dans lequel ladite seconde matière thermoplastique est un PA choisi de préférence parmi les PA amorphes, les PA totalement ou partiellement aromatiques.16. A dispenser according to any one of claims 1 to 15 wherein said second thermoplastic material is a PA preferably chosen from amorphous PAs, fully or partially aromatic PAs.
17. Distributeur selon une quelconque des revendications 1 à 16 dans lequel ledit réservoir et ledit capuchon constituent lesdites pièces moulées.17. A dispenser according to any one of claims 1 to 16 wherein said reservoir and said cap constitute said molded parts.
18. Distributeur selon une quelconque des revendications 1 à 17 dans lequel ledit produit cosmétique est du mascara, et dans lequel ledit capuchon comprend une brosse comme applicateur dudit produit cosmétique. 18. Dispenser according to any one of claims 1 to 17 wherein said cosmetic product is mascara, and wherein said cap comprises a brush as an applicator of said cosmetic product.
19. Utilisation d'une matière thermoplastique comprenant de l'EVOH et une seconde matière thermoplastique choisie parmi un PA, PET, PBT, ou une résine ionomère pour former tout ou partie d'un distributeur de produit cosmétique selon une quelconque des revendications 1 à 1819. Use of a thermoplastic material comprising EVOH and a second thermoplastic material chosen from a PA, PET, PBT, or an ionomer resin to form all or part of a cosmetic product dispenser according to any one of claims 1 to 18
20. Utilisation selon la revendication 19 pour former un distributeur de produits cosmétiques typiquement fluides à semi-solides et à composant volatil, choisi typiquement parmi : les distributeurs de mascara, de vernis à ongles, de rouge à lèvres, de produits cosmétiques en raisin, bâton ou crayon, notamment destinés au maquillage du visage ou des ongles. 20. Use according to claim 19 to form a dispenser of typically fluid cosmetic products with semi-solid and volatile component, typically chosen from: dispensers of mascara, nail polish, lipstick, grape cosmetic products, stick or pencil, in particular for making up the face or nails.
PCT/EP2002/014183 2001-11-29 2002-11-26 Cosmetic product dispenser made of barrier material WO2003045186A1 (en)

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