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 non-planar shape
• • 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 domain of packaging for cosmetic products, typically fluid to semi-solid or paste products, typically such as mascara or lipstick dispensers in the form of tubes, sticks or pencils.
• “Mascara” is a cosmetic product intended for makeup of eyelashes, and the packaging for this cosmetic product is called a “dispenser”.
• European application No. 96 830631.6 describes a mascara dispenser.
• a mascara dispenser typically comprises an applicator provided with a brush and a receptacle forming a reservoir and containing the mascara, the applicator being able to form a sealed cap for the receptacle.
• the dispenser usually comprises a fairly large number of assembled parts.
• These parts are usually made of a moulded plastic material, typically PVC, PP or PE.
• a mascara dispenser must provide sufficiently long life for the mascara, and in particular it must at all costs prevent the mascara from drying, since it must remain sufficiently fluid throughout its life so that the final user can apply it correctly.
• Mascara can dry out for two reasons: either because the dispenser is not leak tight, the junction between the cap and the reservoir not being sealed, or because the walls of the different parts of the dispenser are permeable to volatile constituents of the mascara that diffuse through these walls, and particularly through the reservoir walls.
• WLR weight loss rate
• mascara formulations tend to become increasingly complex and to include solvents or constituents with an increasingly wide variety of natures, some can be relatively volatile, so as to improve the final performance of the mascara. Therefore, formulation of mascaras requires increasingly good barrier properties by the dispenser or the material from which the dispenser is made.
• Cosmetic packagings are articles that may be deluxe articles or general consumer articles, and consequently are controlled by simultaneous requirements for high quality and low production costs.
• the cosmetic product dispenser typically a mascara dispenser, comprises at least one receptacle forming a reservoir for the said cosmetic product, and a cap for sealed closure of the said reservoir, possibly provided with an applicator for the said cosmetic product, all or part of the said reservoir, and at least one side wall of the said reservoir being formed by at least one moulded thermoplastic part, and is characterised in that the said thermoplastic material comprises EVOH and a second thermoplastic material chosen from among PA, PET, PBT and ionomer resin.
• EVOH is an ethylene vinyl alcohol copolymer, and may comprise a percentage of ethylene varying from 20 to 50% in mole % and, according to the invention, the said thermoplastic material may comprise an EVOH percentage varying from 10 to 50% by weight, and preferably an EVOH percentage varying from 20 to 40% by weight.
• the means according to the invention can solve all problems that arise, namely increasing the life of the dispensers and/or reducing the thickness of the dispenser walls.
• the said thermoplastic material can form a layer of thermoplastic material composed of a mix of EVOH and the said second thermoplastic material.
• the said thermoplastic material may comprise a percentage of EVOH varying from 10% to 50% by weight, and a percentage of the said second plastic material varying from 90% to 50% by weight.
• the said EVOH percentage can vary from 20% to 40% by weight, and the said percentage of the said second plastic material varies from 80% to 60% by weight.
• the said moulded part may be formed by known techniques widely used for the formation of parts, typically by extrusion-moulding or by injection-moulding, or again by extrusion-blowing or by injection-blowing in the case of concave or hollow parts.
• the said thermoplastic material can form a multilayer material with at least two layers of plastic material, and typically with two layers: an inner layer being composed of a mix of EVOH and the said second thermoplastic material, and an outer layer composed of the said second thermoplastic material.
• the said multilayer material may include at least three layers of plastic material and typically three layers of thermoplastic material
• a central layer is composed of a mix of EVOH and the said second thermoplastic material, and an inner layer and an outer layer on each side of the central layer, at least one of these layers being composed of the said second thermoplastic material, and one of the inner or outer layers being composed of a third thermoplastic material or by a second thermoplastic material different from the material used in the opposite layer.
• At least one face or one side of the said layer composed of the said EVOH mix may be covered by a tie layer, so as to form a multilayer material typically comprising 3 to 5 layers, the said tie layer being chosen to make one of the other two different layers adhesive, in a manner known in itself.
• the said thermoplastic material may form a multilayer material with three layers: one layer composed of the said mix of EVOH and the said second thermoplastic material, an adhesive tie layer and a layer typically composed of the said second thermoplastic material or by the said third thermoplastic material.
• the said percentage of EVOH in the said mix can vary from 10% to 90% by weight, the said percentage of the said second plastic material in the said thermoplastic material varying from 80% to 60% by weight.
• the said multilayer material may be a material with at least five layers, three layers of thermoplastic material and two tie layers: one layer, typically the central layer, being composed of an EVOH layer, and an inner layer and an outer layer on each side of the said central layer, the inner layer and outer layer composed of the said second thermoplastic material and/or a third thermoplastic material, the said central layer and the said outer and inner layers comprising an adhesive tie layer between them.
• the said third thermoplastic material referred to in the above may typically be chosen from among PE or PP.
• the said moulded part may be formed by co-extrusion of the said multilayer material, followed by moulding or blowing or co-injection.
• the PA when the said second thermoplastic material is PA, the PA may preferably be chosen from among amorphous PAs, and totally or partially aromatic PAs.
• At least the part(s) forming the reservoir, or the receptacle for the said cosmetic product is (are) formed from part(s) moulded from the material containing EVOH and the said second thermoplastic material.
• the dispenser assembly at least the part(s) made of a thermoplastic material forming the wall, may be composed of a material comprising EVOH and the said second thermoplastic material, the said reservoir and the said cap forming the said moulded parts.
• the said cosmetic product may be mascara.
• the said cap may include a brush as applicator of the said cosmetic product.
• thermoplastic material comprising EVOH and a second thermoplastic material chosen from among PA, PET, PBT, or an ionomer resin to form all or part of a cosmetic product dispenser according to the invention, and more particularly to form a dispenser for typically fluid to semi-solid cosmetic products with a volatile constituent, typically mascara, nail varnish, lipstick, cosmetic products in cream, stick or pencil form, intended particularly for makeup of the face or nails.
• a thermoplastic material comprising EVOH and a second thermoplastic material chosen from among PA, PET, PBT, or an ionomer resin
• the body and the cap of mascara dispensers are made by injection moulding or injection blowing when the thermoplastic material consists of a single layer (so-called single layer material) or by co-extrusion blowing when the said thermoplastic material comprises more than one layer (so-called multilayer material).
• At least one layer of “EM” was used as defined above in the table. In some cases, and particularly when one or two SM layers of second plastic materials are used, it was found advantageous to use an EM layer containing the maximum possible proportion of EVOH, while keeping the weight content by EVOH more than 50%.
• the said second plastic materials (PA, PET, PBT, ionomer) were represented generically by SM.
• SM plastic materials
• PE or PP plastic materials
• TM third plastic materials
• the structure of a multilayer material has been represented in the following by the sequence of layers, each layer being separated from the next layer by a “/”.
• EM/SM typically, but not necessarily, comprising the SM material forming the second layer, such that a tie layer TL is not necessary.
• these structures are of the EM/TL/TM type or the SM/EM/SM type or possibly the SM/EM/SM′ type, where SM′ denotes a second thermoplastic material different from SM.
• these structures are of the TM/TL/EM/TL/TM type (where TM′ denotes a third thermoplastic material different from TM) or of the SM or TM/TL/EVOH/TL/SM or TM type, where TM, EVOH denote a 100% EVOH layer.
• I-E Structure with six layers this is a structure with five layers to which a layer of recycled plastic material denoted “R”, typically a recycling polyolefin, has been added, so as to reduce the final material cost.
• R a layer of recycled plastic material
• TM/TL/EM/TL/R/TM a recycling polyolefin

Landscapes

• 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)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8869934

Family Applications (1)

Country Status (5)

Cited By (5)

Citations (2)

Family Cites Families (3)

• 2001
  • 2001-11-29 FR FR0115460A patent/FR2832599B1/fr not_active Expired - Fee Related
• 2002
  • 2002-11-26 WO PCT/EP2002/014183 patent/WO2003045186A1/fr not_active Application Discontinuation
  • 2002-11-26 EP EP02795179A patent/EP1448075A1/fr not_active Withdrawn
  • 2002-11-26 AU AU2002360969A patent/AU2002360969A1/en not_active Abandoned
  • 2002-11-26 US US10/497,180 patent/US20050058498A1/en not_active Abandoned

Patent Citations (2)

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