LU85439A1 - MATERIAL, MANUFACTURING METHOD THEREOF AND APPLICATIONS THEREOF - Google Patents

Abstract

1. A process for causing the adhesion to a substrate of a polymeric material consisting of a homogeneous mixture comprising at least 20% by weight of a regenerated polymeric substance and at least 1% by weight of cellulose fibres, characterized in that the homogeneous mixture also contains a polyolefin modified by a monomer selected from the group comprising unsaturated carboxylic acids, the corresponding anhydrides and derivatives thereof, and in that the proportion of modified polyolefin is such that there is adhesion between the substrate and the polymeric material and such that this proportion of modified polyolefin is less than 10% by weight, based on the said homogeneous mixture.

Description

'' * '/ · T' & * (m C 2308/8406.

PHENIX-WORKS,

Société Anonyme <in FLEMALLE, (Belgium) and INTRÄDEL - Association-Intercommunale de Processing des Waste de la Région Liégeoise, ,, Société Coopérative in LIEGE, (Belgium)

Material, its manufacturing process and its applications.

The present invention relates to a material, to its manufacturing process and also to its applications.

It has been known, for a long time, to combine materials of different nature to form substrates called "sandwiches", designated below by the term "substrates".

This way of proceeding makes it possible to obtain substrates which have very interesting mechanical characteristics, for example acoustic absorption, large moment of inertia, great transverse rigidity, with in addition a weight per unit of surface quite low, which is very suitable. good for applications such as transportation.

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However, by their nature, that is to say the combination of „different materials and by the type of materials used, for example polymers, the cost of manufacturing these substrates is very high.

Given that polymeric materials often enter into the production of said substrates, the manufacturing cost of these very strongly influences the cost price of the prepared substrate, which undoubtedly constitutes a significant handicap for its commercial development.

The purpose of the present invention is to describe a new polymer material which does not have this drawback; in addition we will also explain its manufacturing process and its applications.

AT

The polymer material, object of the present invention, is essentially characterized in that it is obtained from a homogeneous mixture comprising at least one polymeric regeneration material, for at least 20% by weight of the aforementioned mixture, the said mixture also containing at least 1% by weight of cellulosic fibers of natural or non-natural origin and less than 10% by weight of a polyolefin modified by polar monomeric units derived from at least one monomer chosen from the group formed by carboxylic acids unsaturated, the corresponding anhydrides and their derivatives.

The terms “polymeric regeneration material” designate a polymeric material obtained from finished or semi-finished polymeric products, for example packaging products, such as bottles, flasks, bags, etc., or recycled waste during their disposal. manufacturing; these finished or semi-finished products having undergone various treatments intended to restore to them the properties necessary to make them suitable for being incorporated into the above-mentioned mixture; these terms therefore do not apply to virgin materials generally used in admixture to produce polymeric materials.

According to a first embodiment of the polymer material of the invention, it is obtained from a mixture containing one or more of the following products, in the form of polymeric material for regeneration or not: - polyolefin films, - bottles, for example high density polyethylene, polyethylene, polyvinyl chloride, - polyacrylonitriles, - polyamides.

According to a mode of use of the polymer material, object of the present invention, it is brought into contact with at least one material, preferably metallic.

According to another implementation of the preceding method, the polymeric material is brought into contact with at least one coated metallic material, preferably a coated steel sheet.

According to yet another implementation of the polymer material of the invention, it is brought into contact with stainless steel.

According to another embodiment of the polymer material, object of the invention, it is brought into contact with aluminum, or copper or zinc or their alloys.

According to a preferred embodiment of the polymer material of the present invention, the latter is deposited or bonded in the form of a layer on a metallic support or included between two metallic supports or not, so as to produce an element with a sandwich structure, preferably of the metal -, / plastic - metal type.

Claims (7)

1. Polymeric material characterized in that it is obtained from a homogeneous mixture comprising at least one polymeric regeneration material, for at least 20% by weight of the aforementioned mixture, the said mixture also containing at least 1% by weight cellulosic fibers of natural or non-natural origin and less than 10% by weight of a polyolefin modified by polar monomeric units derived from at least one monomer chosen from the group formed by unsaturated carboxylic acids, the corresponding anhydrides and their derivatives . 1 ’* I - 4 - I Claims. j " 2. Material according to claim 1, characterized in that it is obtained from a mixture containing one or more of the following products, in the form of polymeric material for regeneration or not - polyolefin films, - bottles, by example in high density polyethylene, polyethylene, polyvinyl chloride, - polyacrylonitriles, - polyamides. 3. Product using a polymeric material according to claims 1 or 2, characterized in that said polymeric material is brought into contact with at least one material, preferably * metallic. 4. Product according to claim 3, characterized in that the polymeric material is brought into contact with at least one coated metallic material, preferably a coated steel sheet. / I * * - 5 - 5. Product according to claims 3 or 4, characterized in that the polymeric material is brought into contact with stainless steel. 6. Product according to either of claims 3 to 5, characterized in that the polymer material is brought into contact with aluminum, or copper, or zinc or their alloys. 7. Product according to one or more of claims 3 to 6, characterized in that the polymeric material is deposited or bonded in the form of a layer on a metallic support or comprised between two metallic supports or not, so as to produce an element with a sandwich structure , preferably of the metal - plastic - metal type. * *