EP4499404A1 - Elément de garnissage intérieur de véhicule automobile - Google Patents

Elément de garnissage intérieur de véhicule automobile

Info

Publication number
EP4499404A1
EP4499404A1 EP23712274.2A EP23712274A EP4499404A1 EP 4499404 A1 EP4499404 A1 EP 4499404A1 EP 23712274 A EP23712274 A EP 23712274A EP 4499404 A1 EP4499404 A1 EP 4499404A1
Authority
EP
European Patent Office
Prior art keywords
layer
mass
support layer
tpv
coating layer
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.)
Pending
Application number
EP23712274.2A
Other languages
German (de)
English (en)
Inventor
Stéphane Ribes
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.)
Treves Products Services and Innovation SAS
Original Assignee
Treves Products Services and Innovation SAS
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 Treves Products Services and Innovation SAS filed Critical Treves Products Services and Innovation SAS
Publication of EP4499404A1 publication Critical patent/EP4499404A1/fr
Pending legal-status Critical Current

Links

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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/045—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber 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
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • 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
    • B32B27/065—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 foam
    • 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
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/14—Layered products comprising a layer of synthetic resin next to a particulate layer
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2274/00—Thermoplastic elastomer material
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/72—Cured, e.g. vulcanised, cross-linked
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings

Definitions

  • the aim of the invention is to propose a filling element taking into account these various constraints.
  • the invention proposes an interior trim element for a motor vehicle, said element comprising a multilayer complex, said complex comprising:
  • a lower support layer associated with said covering layer said support layer having a minimum surface mass of 400g/m 2 and being optionally based on: o porous fibrous material, o or waterproof flexible plastic material provided with a mineral filler representing at least 50% by mass of said support layer, said coating layer:
  • thermoplastic • comprising at least 85% by mass of vulcanized thermoplastic (TPV),
  • vulcanized thermoplastics are two-phase olefinic materials (alloys) comprising:
  • EPDM ethylene propylene diene monomer
  • FIG.1 is a schematic partial sectional view of an element according to one embodiment
  • FIG.2 is a schematic sectional view of a two-component bonding fiber.
  • an interior trim element 1 of a motor vehicle - such as a carpet or a door trim panel -, said element comprising a multilayer complex 2, said complex comprising:
  • a lower support layer 4 associated with said covering layer said support layer having a minimum surface mass of 400g/m 2 and being optionally based on: o porous fibrous material - for example based on needled felt -, o or flexible plastic material - for example an elastomer (for example ethylene propylene diene monomer, etc.), a plastomer, ethylene acetate of vinyl mixed with polyethylene, ... - waterproof provided with a mineral filler representing at least 50% - in particular at least 75% - by mass of said support layer, said coating layer:
  • thermoplastic • comprising at least 85% by mass of vulcanized thermoplastic (TPV),
  • the coating layer 3 further comprises less than 15% by mass of dispersed filler (for example calcium carbonate), so as to reduce its cost while maintaining good resistance of said layer to abrasion.
  • dispersed filler for example calcium carbonate
  • the coating layer 3 is a first layer of the coating layer 3:
  • TPV vulcanized thermoplastic
  • TPV has good hot adhesion, its surface tension at room temperature already being greater than 45 dyn according to the ISO 8296:2003 standard. As a result, the TPV has a very good ability to be laminated onto a support layer 4 to which it adheres strongly.
  • the very good abrasion resistance of TPV makes it possible to provide for the deposition in a very thin layer of the coating layer 3 on the support layer 4, said support layer allowing the shape of said coating layer to be maintained. despite its finesse.
  • the coating layer 3 can be grained on its appearance face, either before or after its association with the support layer 4.
  • the support layer 4 is based on waterproof flexible plastic material provided with a mineral filler representing at least 50% by mass of said layer, the element 1 further comprising a spring layer 5 elastically compressible arranged below said support layer, so that said element forms a “mass/spring” type acoustic insulation system, the mass layer of said system being formed by complex 2.
  • the spring layer 5 is notably based on:
  • connecting fibers 6 • or a mixture of elastically compressible foam flakes (for example polyurethane) linked together by two-component connecting fibers 6, said connecting fibers comprising a core 7 with a high melting point (for example made of polyester) and a sheath 8 with a lower melting point (for example in modified polyester), the fusion of said sheath ensuring the connection of said flakes together.
  • a high melting point for example made of polyester
  • a sheath 8 with a lower melting point for example in modified polyester

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un élément (1) de garnissage intérieur de véhicule automobile, comprenant un complexe (2) comprenant une couche de revêtement (3) supérieure à base de matériau thermoplastique et une couche de support (4) inférieure associée à ladite couche de revêtement, ladite couche de support présentant une masse surfacique minimale de 400g/m² et étant au choix à base de matériau fibreux poreux ou de matériau plastique flexible étanche pourvu d'une charge minérale représentant au moins 50% en masse de ladite couche de support, ladite couche de revêtement comprenant au moins 85% en masse de thermoplastique vulcanisé (TPV) et présentant une masse surfacique inférieure à 600 g/m².

Description

DESCRIPTION
Titre : Elément de garnissage intérieur de véhicule automobile
L’invention concerne un élément de garnissage intérieur de véhicule automobile.
Il est connu de réaliser un élément de garnissage intérieur de véhicule automobile - tel qu’un tapis ou un panneau de garniture de porte -, ledit élément comprenant un complexe multicouche, ledit complexe comprenant :
• une couche de revêtement supérieure à base de matériau thermoplastique,
• une couche de support inférieure associée à ladite couche de revêtement, ladite couche de support présentant une masse surfacique minimale de 400g/m2 et étant au choix à base : o de matériau fibreux poreux, o ou de matériau plastique flexible étanche pourvu d’une charge minérale représentant au moins 50% en masse de ladite couche de support.
Usuellement, une couche de support à base de matériau plastique étanche, tel qu’évoquée ci-dessus, est disposée sur une couche de ressort élastiquement compressible de sorte que l’élément apporte une isolation acoustique basée sur un principe de « masse/ressort ».
Un certain nombre d’exigences doivent être prises en compte pour réaliser un élément de garnissage tel que décrit ci-dessus.
En particulier, la couche de revêtement doit présenter :
• une masse minimisée, ladite couche étant souvent à base de matériau coûteux,
• une brillance minimisée, afin de lui conférer un aspect avantageux, • une polarité importante (tension de surface élevée), de manière à adhérer fortement à la couche de support,
• éventuellement une aptitude à l’extrusion, en vue de son dépôt par extrusion suivie d’un calandrage sur la couche de support,
• éventuellement la possibilité d’être à base de matériau issu de recyclage, afin de minimiser le coût et l’impact environnemental.
L’invention a pour but de proposer un élément de garnissage prenant en compte ces diverses contraintes.
A cet effet, et selon un premier aspect, l’invention propose un élément de garnissage intérieur de véhicule automobile, ledit élément comprenant un complexe multicouche, ledit complexe comprenant :
• une couche de revêtement supérieure à base de matériau thermoplastique,
• une couche de support inférieure associée à ladite couche de revêtement, ladite couche de support présentant une masse surfacique minimale de 400g/m2 et étant au choix à base : o de matériau fibreux poreux, o ou de matériau plastique flexible étanche pourvu d’une charge minérale représentant au moins 50% en masse de ladite couche de support, ladite couche de revêtement :
• comprenant au moins 85% en masse de thermoplastique vulcanisé (TPV),
• présentant une masse surfacique inférieure à 600 g/m2.
Dans cette description, les termes de positionnement dans l’espace (supérieur, inférieur, dessous, ...) sont pris en référence à l’élément de garnissage mis en place dans le véhicule. On rappelle ici que les thermoplastiques vulcanisés (TPV) sont des matériaux oléfiniques biphasiques (alliages) comportant :
• une phase rigide en polypropylène (homopolymère et/ou copolymère),
• et une phase souple réticulée en éthylène propylène diène monomère (EPDM).
Avec l’agencement proposé, la présence de TPV dans la couche de revêtement permet :
• de minimiser sa masse, ceci en raison de la très grande résistance à l’abrasion du TPV qui autorise la réalisation de ladite couche en très fine épaisseur,
• de minimiser sa brillance, le TPV étant de nature mate,
• de maximiser sa polarité, le TPV étant un matériau fortement polaire,
• de lui conférer une bonne aptitude à l’extrusion, notamment en fine épaisseur, le TPV présentant lui-même une bonne aptitude à être extrudé,
• l’utilisation de matériaux issus de recyclage, le TPV pouvant lui-même être issu d’une telle filière.
D’autres particularités et avantages de l’invention apparaîtront dans la description qui suit, faite en référence aux figures jointes, dans lesquelles : [Fig.1] est une vue schématique en coupe partielle d’un élément selon une réalisation,
[Fig .2] est une vue schématique en coupe d’une fibre de liaison bi-composant.
En référence aux figures, on décrit un élément 1 de garnissage intérieur de véhicule automobile - tel qu’un tapis ou un panneau de garniture de porte -, ledit élément comprenant un complexe 2 multicouche, ledit complexe comprenant :
• une couche de revêtement 3 supérieure à base de matériau thermoplastique,
• une couche de support 4 inférieure associée à ladite couche de revêtement, ladite couche de support présentant une masse surfacique minimale de 400g/m2 et étant au choix à base : o de matériau fibreux poreux - par exemple à base de feutre aiguilleté -, o ou de matériau plastique flexible - par exemple un élastomère (par exemple d’éthylène propylène diène monomère,...), un plastomère, de l’éthylène-acétate de vinyle mélangé à du polyéthylène, ... - étanche pourvu d’une charge minérale représentant au moins 50% - notamment au moins 75 % - en masse de ladite couche de support, ladite couche de revêtement :
• comprenant au moins 85% en masse de thermoplastique vulcanisé (TPV),
• présentant une masse surfacique inférieure à 600 g/m2.
Selon une réalisation, la couche de revêtement 3 comprend en outre moins de 15% en masse de charge dispersée (par exemple du carbonate de calcium), de manière à baisser son coût tout en conservant une bonne résistance de ladite couche à l’abrasion.
Selon une réalisation, la couche de revêtement 3 :
• présente une masse surfacique comprise entre 300 et 400 g/m2, de manière à minimiser l’utilisation de thermoplastique vulcanisé (TPV),
• provient d’une extrusion suivie d’un calandrage sur la couche de support 4.
La minimisation de l’utilisation de TPV est notamment motivée par des considérations de nature économique, le TPV étant un produit onéreux.
En vue de minimiser encore l’impact économique de l’utilisation d’un tel produit et de favoriser une démarche environnementale, on peut avantageusement utiliser du TPV issu de recyclage.
Il est à noter que le TPV présente une bonne adhésion à chaud, sa tension de surface à température ambiante étant déjà supérieure à 45 dyn selon la norme ISO 8296:2003. Il en résulte que le TPV présente une très bonne aptitude à être laminé sur une couche de support 4 à laquelle il adhère fortement.
En outre, la très bonne résistance à l’abrasion du TPV permet de prévoir le dépôt en couche très fine de la couche de revêtement 3 sur la couche de support 4, ladite couche de support permettant un maintien de la forme de ladite couche de revêtement malgré sa finesse.
Selon diverses réalisations, la couche de revêtement 3 peut être grainée sur sa face d’aspect, soit avant soit après son association à la couche de support 4.
Selon la réalisation représentée en figure 1 , la couche de support 4 est à base de matériau plastique flexible étanche pourvu d’une charge minérale représentant au moins 50% en masse de ladite couche, l’élément 1 comprenant en outre une couche de ressort 5 élastiquement compressible disposée en- dessous de ladite couche de support, de sorte que ledit élément forme un système d’isolation acoustique de type « masse/ressort », la couche de masse dudit système étant formée par le complexe 2.
La couche de ressort 5 est notamment à base :
• de mousse élastiquement compressible, notamment de polyuréthanne, présentant notamment une masse volumique comprise entre 50 et 100 g/m3,
• ou de matériau fibreux poreux, par exemple sous forme de feutre aiguilleté,
• ou d’un mélange de flocons de mousse (par exemple de polyuréthanne) élastiquement compressible liés entre eux par des fibres de liaison bi- composant 6, lesdites fibres de liaison comprenant une âme 7 à haut point de fusion (par exemple en polyester) et une gaine 8 à point de fusion moindre (par exemple en polyester modifié), la fusion de ladite gaine assurant la liaison desdits flocons entre eux.

Claims

REVENDICATIONS
1. Elément (1 ) de garnissage intérieur de véhicule automobile, ledit élément comprenant un complexe (2) multicouche, ledit complexe comprenant :
• une couche de revêtement (3) supérieure à base de matériau thermoplastique,
• une couche de support (4) inférieure associée à ladite couche de revêtement, ladite couche de support présentant une masse surfacique minimale de 400g/m2 et étant au choix à base : o de matériau fibreux poreux, o ou de matériau plastique flexible étanche pourvu d’une charge minérale représentant au moins 50% en masse de ladite couche de support, ledit élément étant caractérisé en ce que ladite couche de revêtement :
• comprend au moins 85% en masse de thermoplastique vulcanisé (TPV),
• présente une masse surfacique inférieure à 600 g/m2.
2. Elément selon la revendication 1 , caractérisé en ce que la couche de revêtement (3) comprend en outre moins de 15% en masse de charge dispersée, de manière à conserver une bonne résistance à l’abrasion.
3. Elément selon l'une des revendications précédentes, caractérisé en ce que la couche de revêtement (3) :
• présente une masse surfacique comprise entre 300 et 400 g/m2, de manière à minimiser l’utilisation de thermoplastique vulcanisé (TPV),
• provient d’une extrusion suivie d’un calandrage sur la couche de support (4).
4. Elément selon l'une quelconque des revendications précédentes, caractérisé en ce que, quand la couche de support (4) est à base de matériau plastique flexible étanche pourvu d’une charge minérale représentant au moins 50% en masse de ladite couche, ledit élément comprend en outre une couche de ressort (5) élastiquement compressible disposée en-dessous de ladite couche de support, de sorte que ledit élément forme un système d’isolation acoustique de type « masse/ressort », la couche de masse dudit système étant formée par le complexe (2).
5. Elément selon la revendication précédente, caractérisé en ce que la couche de ressort (5) est à base :
• de mousse élastiquement compressible, • ou de matériau fibreux poreux,
• ou d’un mélange de flocons de mousse élastiquement compressible liés entre eux par des fibres de liaison bi-composant (6), lesdites fibres de liaison comprenant une âme (7) à haut point de fusion et une gaine (8) à point de fusion moindre, la fusion de ladite gaine assurant la liaison desdits flocons entre eux.
EP23712274.2A 2022-03-24 2023-03-21 Elément de garnissage intérieur de véhicule automobile Pending EP4499404A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2202649A FR3133806B1 (fr) 2022-03-24 2022-03-24 Elément de garnissage intérieur de véhicule automobile
PCT/EP2023/057148 WO2023180286A1 (fr) 2022-03-24 2023-03-21 Elément de garnissage intérieur de véhicule automobile

Publications (1)

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EP4499404A1 true EP4499404A1 (fr) 2025-02-05

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EP23712274.2A Pending EP4499404A1 (fr) 2022-03-24 2023-03-21 Elément de garnissage intérieur de véhicule automobile

Country Status (4)

Country Link
US (1) US20250187323A1 (fr)
EP (1) EP4499404A1 (fr)
FR (1) FR3133806B1 (fr)
WO (1) WO2023180286A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049894B1 (fr) * 2016-04-12 2018-05-18 Treves Products, Services & Innovation Procede de realisation d’un panneau insonorisant de garnissage interieur de vehicule automobile
EP3478538B1 (fr) * 2016-07-01 2024-11-13 TREVES Products, Services & Innovation Panneau de protection acoustique destiné à habiller une paroi de véhicule automobile

Also Published As

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FR3133806A1 (fr) 2023-09-29
FR3133806B1 (fr) 2024-04-05
WO2023180286A1 (fr) 2023-09-28
US20250187323A1 (en) 2025-06-12

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