WO2010149884A1 - Biodegradable multilayer material and method of obtaining such a material - Google Patents

Biodegradable multilayer material and method of obtaining such a material Download PDF

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Publication number
WO2010149884A1
WO2010149884A1 PCT/FR2010/000469 FR2010000469W WO2010149884A1 WO 2010149884 A1 WO2010149884 A1 WO 2010149884A1 FR 2010000469 W FR2010000469 W FR 2010000469W WO 2010149884 A1 WO2010149884 A1 WO 2010149884A1
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WO
WIPO (PCT)
Prior art keywords
cellulose
biodegradable
layer
resin
based material
Prior art date
Application number
PCT/FR2010/000469
Other languages
French (fr)
Inventor
Vincent Pluquet
Antoine Longieras
Xavier Garreau
Original Assignee
Vegeplast
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Filing date
Publication date
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Publication of WO2010149884A1 publication Critical patent/WO2010149884A1/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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/06—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14811—Multilayered articles
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/06—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B27/10—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 paper or cardboard
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B65D65/466—Bio- or photodegradable packaging materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0059—Degradable
    • B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • 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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

  • the present invention relates to a biodegradable multilayer material and a method for obtaining such a material.
  • Biodegradable materials are increasingly present in our environment. They are most often made from plant materials while competing materials are most often made from polymers or other compounds derived from petrochemicals. The use of biodegradable materials therefore saves energy resources of the planet.
  • the biodegradable materials are easy to treat after use. They are therefore valuable without being incinerated or subjected to other transformations.
  • the present invention relates more particularly to the field of application of the package. In this field, trays are used, for example, for packaging food. It is known here to use for example a material called PLA (abbreviations for polylactic acid). This material is used either pure or mixed with other biodegradable materials. When used for PLA is waterproof but has the disadvantage of being brittle. It is therefore most often mixed with another biodegradable material.
  • biodegradable materials including PLA
  • they do not form a gas barrier, for example oxygen.
  • a gas barrier for example oxygen.
  • a film usually non-biodegradable, is used.
  • the present invention therefore aims to provide a biodegradable material waterproof and / or gas barrier and a method for obtaining such a material.
  • the present invention provides a multilayer material comprising a first agromaterial layer made from at least 90% agro-resources.
  • said first layer is associated with a second layer of cellulose-based material on one side, the second cellulose-based layer is covered with a biodegradable resin of opposite side to the first layer.
  • the multilayer material is made essentially from agro-resources which are the plants providing the basic compounds necessary for energy, chemistry and materials, in particular: lipids and proteins obtained from rapeseed, sunflower, soybean, flax, ..., carbohydrates obtained from cereal and sugar beet crops, lignocellulosic fibers from crop residues, such as straw, annual crops such as hemp and sorghum, and forestry, as well as specific molecules derived from co-products of various plants, these agro-resources being or not transformed, the transformation being able to lead to materials such as PLA (polylactic acid), PHB (polyhydroxy butyrate), PHA (polyhydroxyalkanoate), biodegradable polyesters, ....
  • PLA polylactic acid
  • PHB polyhydroxy butyrate
  • PHA polyhydroxyalkanoate
  • biodegradable polyesters ....
  • the cellulose-based material is coated on one side with a biodegradable resin, and the cellulose-based material is disposed in the multilayer material so that the resin is outside.
  • the resin is outside.
  • the cellulose-based material used may be for example paper, especially kraft paper. Such a paper is on the one hand known for its mechanical properties and on the other hand is biodegradable.
  • the layer of cellulose-based material may also be constituted for example by a cellulosic film, which is a thin and transparent film made from cellulose pulp or other forms.
  • a preferred embodiment of a multilayer material according to the present invention provides that the agromaterial layer has the following composition, the percentages being expressed by weight of the dry matter:
  • the biodegradable resin may in turn be covered with an outer layer.
  • This outer layer can be used for labeling or decoration for example.
  • a multilayer material according to the present invention can also be made without the use of adhesive between the various layers constituting it.
  • the present invention also relates to a method of producing a multilayer material.
  • this method consists in disposing in a mold a sheet of cellulose-based material covered on one side with a resin such that said sheet at least partially covers a wall of the mold and that the resin-coated surface is oriented towards the wall of the mold, then injecting a biodegradable material made of at least 90% agro-resources according to a molding labeling method, the injected material coming into contact with the sheet of material based on of cellulose.
  • a molding labeling process is commonly referred to by the acronym IML, from English
  • the cellulose-based material used is preferably paper, especially kraft paper.
  • the sheet of cellulose-based material may also be a cellulosic film.
  • the present invention also relates to a tray for packaging food products, characterized in that it is made of a multilayer material as described above.
  • the cellulose-based material and the resin are preferably disposed within the tray.
  • the cellulose-based material and the resin used are preferably formed by a kraft paper complex associated with a biodegradable resin in the form of a film.
  • a tray according to the present invention may also have a bottom covered with a label or a decoration.
  • the present invention relates to the production of a multilayer material which is preferably entirely biodegradable and which can be used in particular for the production of packaging.
  • a packaging that forms a gas barrier and / or is watertight should be used.
  • biodegradable agromaterials described for example in document FR-2 783 740 do not make it possible to achieve such a seal.
  • the idea behind the present invention is to associate with such materials a film to form a gas barrier which is preferably also waterproof. Many tests have been done but to no avail. Indeed, it is difficult to obtain good cohesion between a sealed film and agromaterial.
  • an injectable biodegradable agromaterial of the type of those described in document FR-2 783 740, binds very well with cellulose-based materials by using, for example, a method of labeling with molding. Such a method is better known under the initials IML (English In-MoId Labeling).
  • a multilayer material according to the invention consists of a layer of biodegradable agromaterial, a layer of paper or cellulosic film and a biodegradable resin layer, the paper layer or cellulosic film being sandwiched between the agromaterial and the resin.
  • the biodegradable agromaterial may consist of fibers, starch and an adjuvant such as for example PLA (English abbreviations of PoIy Lactic Acid or in French, polylactic acid) or biodegradable polyesters.
  • the agromaterial used here preferably consists of more than 90% (on the dry matter) of compounds derived from agro-resources, that is to say from components such as starch, flours, fibers biodegradable polyesters, etc.
  • the proportion of these compounds from agroresources can even be preferably 100% but it can also contain components such as dyes, for example not from agro-resources.
  • the biodegradable agromaterial is a plant material based on at least one whole cereal plant.
  • FR-2 783 740 discloses a method for obtaining such materials and gives examples of such materials.
  • Such granules having possibly undergone extrusion, exhibit a behavior comparable to that of a thermoplastic material and can then be injected into a mold.
  • the use of such aggregates is quite comparable to that of synthetic plastics such as polyethylene, polypropylene and polystyrene.
  • the thickness of the agromaterial layer will depend on the desired use of the multi-layer material. Depending on the desired strength, the agromaterial will have a greater or lesser thickness. In the field of packaging, for example, a thickness of the order of a millimeter or a few millimeters will be provided.
  • the cellulose-based material used for making a multilayer according to the present invention is preferably paper known as kraft paper.
  • Such paper is biodegradable.
  • the multilayer obtained by combining the biodegradable material described above and the kraft paper will therefore also be biodegradable.
  • This type of paper also has the advantage of being very resistant. It is obtained with pasta based on wood treated with soda.
  • the wood used generally is softwood, type pine or fir.
  • the paper used here can have different weights depending on the use of the multilayer material.
  • the kraft paper used has a basis weight of between 40 and 180 g / m 2 .
  • the resin used is also preferably biodegradable.
  • a resin is for example known under the trade name NatureFlex and marketed by Innovia.
  • resin layer By way of nonlimiting example, mention may be made of the use of a biodegradable film as described in document WO-2009/024812, for producing the resin layer.
  • the term "resin” is used here in its broad sense and here designates a solid, semi-solid or pseudo-solid organic material which has a tendency to flow when it is stressed.
  • the multilayer material described here comprising a layer of biodegradable agromaterial, a layer of kraft paper and a layer of resin in the form of a film marketed under the trademark NatureFlex is a biodegradable material according to standard NF EN 13432.
  • a multilayer product according to the invention comprises firstly an agromaterial layer and secondly a layer of paper, or cellulosic film, associated with a resin.
  • the paper or cellulosic film
  • the paper covers only one side of the layer of paper or cellulosic film and the other side of this layer, not covered with resin, comes into direct contact with biodegradable agromaterial.
  • the method of molding labeling also known under the initials IML for In-MoId Labeling, consists in depositing a plastic label in an injection tool during the manufacture of a packaging, also made of synthetic material. It is not at all common to use such a process with paper or cellulosic film. In addition, when it comes to labeling, the label is of course glued to the outside of the package to be visible to the consumer.
  • the present invention proposes in an original way to use a process resulting from the IML process. It is proposed here to place in the mold a sheet of cellulose-based material, associated or not with resin, especially in the form of a film, in the injection tooling, an uncoated cellulose-based material face. located inside the tooling. In addition, unlike an IML process usually used, the layer of cellulose-based material is deposited on the wall of the tool corresponding to the inner face of the package (and not its outer face).
  • the biodegradable agromaterial is injected into the tooling by a conventional injection method known to those skilled in the art and not described in detail here.
  • a multilayer material according to the invention is thus obtained with excellent bonding between the cellulose-based material, for example paper, kraft paper or cellulosic film, and the biodegradable agromaterial which has been injected.
  • the multilayer thus obtained makes it possible to provide a gas barrier and to obtain a good watertightness.
  • This multilayer material is well suited for the production of packaging, particularly in the field of food but other uses may be considered.
  • a package it is preferable to provide labeling and / or decoration. It is possible to add to the resin a new complex, formed for example of a cellulosic film and a sheet of paper, to decorate and / or label the package.
  • a multilayer material comprising in the following order a layer of biodegradable agromaterial, a thin layer based on cellulose such as for example a sheet of paper or a cellulosic film, then a biodegradable resin film, itself covered with a cellulosic film and finally a paper.
  • the present invention is not limited to the preferred embodiments described above by way of non-limiting examples. It also relates to all the variants within the scope of those skilled in the art within the scope of the claims below.
  • a multilayer material for example, other methods could be implemented to obtain a multilayer material according to the present invention.
  • agromaterial many variants of agromaterial can be used.
  • the cellulose-based material is preferably paper, especially kraft paper for its high mechanical strength and biodegradability, but other cellulose-based materials, preferably biodegradable, can be envisaged.
  • the examples of resins used are also given for illustrative purposes and are not limiting. Depending on the characteristics that one wishes to obtain, for example barrier to certain gases, the choice of resins can be adapted.
  • the resin may, instead of being in the form of a film, be sprayed for example on the surface of the paper or associated with the paper in any other way.

Abstract

A multilayer material according to the present invention comprises: a first layer of biodegradable agricultural material produced from at least 90% agricultural resources, and a layer of cellulose-based material on one face of said first layer, one face of the cellulose-based material being covered with a resin in such a way that the resin is located on the outside of the multilayer material. A method of producing such a material consists, for example, in disposing a sheet of paper covered with resin in a mould such that said sheet at least partially covers one wall of the mould, then in injecting a biodegradable agricultural material produced from at least 90% agricultural resources in an in-mould labelling method.

Description

Matériau multicouches biodégradable et procédé d'obtention d'un tel matériau Biodegradable multilayer material and process for obtaining such a material
La présente invention concerne un matériau multicouches biodégradable ainsi qu'un procédé pour l'obtention d'un tel matériau.The present invention relates to a biodegradable multilayer material and a method for obtaining such a material.
Les matériaux biodégradables sont de plus en plus présents dans notre environnement. Ils sont le plus souvent réalisés à partir de matières végétales alors que les matériaux concurrents sont le plus souvent réalisés à partir de polymères ou autres composés issus de la pétrochimie. L'utilisation de matériaux biodégradables permet donc d'économiser des ressources énergétiques de la planète.Biodegradable materials are increasingly present in our environment. They are most often made from plant materials while competing materials are most often made from polymers or other compounds derived from petrochemicals. The use of biodegradable materials therefore saves energy resources of the planet.
En outre, les matériaux biodégradables sont faciles à traiter après leur utilisation. Ils sont donc valorisablès sans être incinérés ou soumis à d'autres transformations. La présente invention concerne plus particulièrement le domaine d'application de l'emballage. Dans ce domaine, on utilise par exemple des barquettes pour emballer des aliments. Il est connu ici d'utiliser par exemple un matériau appelé PLA (abréviations pour acide polylactique). Ce matériau est utilisé soit pur, soit mélangé à d'autres matériaux biodégradables. Lorsqu'il est utilisé pur le PLA est étanche à l'eau mais présente toutefois l'inconvénient d'être cassant. Il est donc le plus souvent mélangé à un autre matériau biodégradable.In addition, the biodegradable materials are easy to treat after use. They are therefore valuable without being incinerated or subjected to other transformations. The present invention relates more particularly to the field of application of the package. In this field, trays are used, for example, for packaging food. It is known here to use for example a material called PLA (abbreviations for polylactic acid). This material is used either pure or mixed with other biodegradable materials. When used for PLA is waterproof but has the disadvantage of being brittle. It is therefore most often mixed with another biodegradable material.
Un autre inconvénient des matériaux biodégradables, y compris le PLA, est qu'ils ne forment pas une barrière aux gaz, par exemple l'oxygène. Dans le domaine de l'emballage alimentaire, si une barquette en matériau biodégradable est utilisée et que l'on souhaite réaliser une barrière aux gaz (et éventuellement à l'eau) un film, le plus souvent non-biodégradable, est utilisé.Another disadvantage of biodegradable materials, including PLA, is that they do not form a gas barrier, for example oxygen. In the field of food packaging, if a tray of biodegradable material is used and that it is desired to achieve a barrier to gases (and possibly water) a film, usually non-biodegradable, is used.
La présente invention a alors pour but de fournir un matériau biodégradable étanche à l'eau et/ou barrière aux gaz ainsi qu'un procédé permettant d'obtenir un tel matériau. À cet effet, la présente invention propose un matériau multicouches comportant une première couche d'agromatériau réalisée à base d'au moins 90% d'agro-ressources. Selon la présente invention, ladite première couche est associée à une seconde couche de matériau à base de cellulose sur une face, la seconde couche à base de cellulose est recouverte d'une résine biodégradable du côté opposé à la première couche.The present invention therefore aims to provide a biodegradable material waterproof and / or gas barrier and a method for obtaining such a material. For this purpose, the present invention provides a multilayer material comprising a first agromaterial layer made from at least 90% agro-resources. According to the present invention, said first layer is associated with a second layer of cellulose-based material on one side, the second cellulose-based layer is covered with a biodegradable resin of opposite side to the first layer.
Il a été remarqué que de façon surprenante le matériau à base de cellulose adhérait très bien aux agromatériaux biodégradables et pouvait donc être combiné à de telles matières pour augmenter les performances du matériau biodégradable.It has been remarked that, surprisingly, the cellulose-based material adhered very well to biodegradable agromaterials and could therefore be combined with such materials to increase the performance of the biodegradable material.
Le matériau multicouches est réalisé à base essentiellement d'agro- ressources qui sont les végétaux fournissant des composés de base nécessaires à l'énergie, la chimie et les matériaux, notamment : des lipides et protéines obtenus à partir de colza, tournesol, soja, lin, ... , des glucides obtenues à partir de cultures céréalières et betteravières, des fibres lignocellulosiques provenant de résidus de cultures, tels de la paille, de plantes annuelles telles le chanvre et le sorgho par exemple, et de la sylviculture, ainsi que des molécules spécifiques issues de coproduits de diverses plantes, ces agro-ressources étant ou non transformées, la transformation pouvant conduire à des matériaux tels du PLA (acide polylactique), du PHB (poly hydroxy butyrate), du PHA (poly hydroxy alkanoate), des polyesters biodégradables, ....The multilayer material is made essentially from agro-resources which are the plants providing the basic compounds necessary for energy, chemistry and materials, in particular: lipids and proteins obtained from rapeseed, sunflower, soybean, flax, ..., carbohydrates obtained from cereal and sugar beet crops, lignocellulosic fibers from crop residues, such as straw, annual crops such as hemp and sorghum, and forestry, as well as specific molecules derived from co-products of various plants, these agro-resources being or not transformed, the transformation being able to lead to materials such as PLA (polylactic acid), PHB (polyhydroxy butyrate), PHA (polyhydroxyalkanoate), biodegradable polyesters, ....
Pour augmenter les performances du matériau multicouches en termes d'étanchéité l'eau et former aussi une barrière aux gaz, le matériau à base de cellulose est recouvert sur une face d'une résine -biodégradable-, et le matériau à base de cellulose est disposé dans le matériau multicouches de manière à ce que la résine se trouve à l'extérieur. Il convient ici de conserver une liaison directe entre le matériau à base de cellulose et l'agromatériau.In order to increase the performance of the multilayer material in terms of sealing the water and also forming a gas barrier, the cellulose-based material is coated on one side with a biodegradable resin, and the cellulose-based material is disposed in the multilayer material so that the resin is outside. Here it is necessary to maintain a direct connection between the cellulose-based material and the agromaterial.
Le matériau à base de cellulose utilisé peut être par exemple du papier, notamment du papier kraft. Un tel papier est d'une part connu pour ses propriétés mécaniques et est d'autre part biodégradable. La couche de matériau à base de cellulose peut également être constituée par exemple par un film cellulosique, qui est une pellicule mince et transparente fabriquée à partir de cellulose en pâte ou sous d'autres formes.The cellulose-based material used may be for example paper, especially kraft paper. Such a paper is on the one hand known for its mechanical properties and on the other hand is biodegradable. The layer of cellulose-based material may also be constituted for example by a cellulosic film, which is a thin and transparent film made from cellulose pulp or other forms.
Une forme de réalisation préférée d'un matériau multicouches selon la présente invention prévoit que la couche d'agromatériau présente la composition suivante, les pourcentages étant exprimés en poids de la matière sèche :A preferred embodiment of a multilayer material according to the present invention provides that the agromaterial layer has the following composition, the percentages being expressed by weight of the dry matter:
- entre 20% et 60% d'amidon,between 20% and 60% of starch,
- entre 3% et 20% de protéines,between 3% and 20% protein,
- entre 15% et 60% de cellulose, d'hémicellulose et de lignine, -entre 1% et 15% de lipides, etbetween 15% and 60% of cellulose, hemicellulose and lignin, between 1% and 15% of lipids, and
- entre 0,01 % et 10% de sucres.between 0.01% and 10% of sugars.
Dans un matériau multicouches tel que décrit plus haut, la résine biodégradable peut être recouverte à son tour d'une couche extérieure. Cette couche extérieure peut être utilisée pour réaliser un étiquetage ou bien une décoration par exemple.In a multilayer material as described above, the biodegradable resin may in turn be covered with an outer layer. This outer layer can be used for labeling or decoration for example.
Un matériau multicouches selon la présente invention peut aussi être réalisé sans utilisation d'adhésif entre les différentes couches le constituant.A multilayer material according to the present invention can also be made without the use of adhesive between the various layers constituting it.
La présente invention concerne également un procédé de réalisation d'un matériau multicouches. Selon l'invention, ce procédé consiste à disposer dans un moule une feuille de matériau à base de cellulose recouverte sur une face d'une résine de telle sorte que ladite feuille recouvre au moins partiellement une paroi du moule et que la face recouverte de résine soit orientée vers la paroi du moule, puis à injecter une matière biodégradable réalisée à base d'au moins 90% d'agro-ressources selon un procédé d'étiquetage au moulage, la matière injectée venant au contact de la feuille de matériau à base de cellulose. Un procédé d'étiquetage au moulage est couramment désigné par l'acronyme IML, de l'anglaisThe present invention also relates to a method of producing a multilayer material. According to the invention, this method consists in disposing in a mold a sheet of cellulose-based material covered on one side with a resin such that said sheet at least partially covers a wall of the mold and that the resin-coated surface is oriented towards the wall of the mold, then injecting a biodegradable material made of at least 90% agro-resources according to a molding labeling method, the injected material coming into contact with the sheet of material based on of cellulose. A molding labeling process is commonly referred to by the acronym IML, from English
"In-MoId Labelling"."In-MoId Labeling".
Dans un tel procédé, le matériau à base de cellulose utilisé est de préférence un papier, notamment un papier kraft. La feuille de matériau à base de cellulose peut aussi être un film cellulosique.In such a process, the cellulose-based material used is preferably paper, especially kraft paper. The sheet of cellulose-based material may also be a cellulosic film.
La présente invention concerne également une barquette destinée à l'emballage de produits alimentaires, caractérisée en ce qu'elle est réalisée dans un matériau multicouches tel que décrit plus haut. Dans une telle barquette, le matériau à base de cellulose et la résine sont de préférence disposés à l'intérieur de la barquette. Pour obtenir une barquette étanche à l'eau et formant barrière aux gaz, le matériau à base de cellulose et la résine utilisés sont formés de préférence par un complexe de papier kraft associé à une résine biodégradable sous forme de film. Une barquette selon la présente invention peut également présenter un fond recouvert d'une étiquette ou d'une décoration.The present invention also relates to a tray for packaging food products, characterized in that it is made of a multilayer material as described above. In such a tray, the cellulose-based material and the resin are preferably disposed within the tray. In order to obtain a water-tight and gas barrier tray, the cellulose-based material and the resin used are preferably formed by a kraft paper complex associated with a biodegradable resin in the form of a film. A tray according to the present invention may also have a bottom covered with a label or a decoration.
La présente invention sera mieux comprise à l'aide de la description détaillée qui suit, décrivant quelques exemples de réalisation de l'invention ainsi qu'un procédé selon l'invention. La présente invention concerne la réalisation d'un matériau multicouches qui est de préférence entièrement biodégradable et qui peut être utilisé notamment pour la réalisation d'emballages. Pour l'emballage de certains produits alimentaires, il convient d'utiliser un emballage qui forme une barrière aux gaz et/ou soit étanche à l'eau.The present invention will be better understood with the aid of the detailed description which follows, describing some examples of embodiment of the invention as well as a method according to the invention. The present invention relates to the production of a multilayer material which is preferably entirely biodegradable and which can be used in particular for the production of packaging. For the packaging of certain food products, a packaging that forms a gas barrier and / or is watertight should be used.
Les agromatériaux biodégradables décrits par exemple dans le document FR-2 783 740 ne permettent pas de réaliser une telle étanchéité. L'idée à l'origine de la présente invention est d'associer à de tels matériaux un film pour former une barrière aux gaz qui soit de préférence également étanche à l'eau. De nombreux essais ont été effectués mais en vain. En effet, il est difficile d'obtenir une bonne cohésion entre un film étanche et l'agromatériau.The biodegradable agromaterials described for example in document FR-2 783 740 do not make it possible to achieve such a seal. The idea behind the present invention is to associate with such materials a film to form a gas barrier which is preferably also waterproof. Many tests have been done but to no avail. Indeed, it is difficult to obtain good cohesion between a sealed film and agromaterial.
De façon surprenante, il a été constaté qu'un agromatériau biodégradable injectable, de type de ceux décrits dans le document FR-2 783 740, se liait très bien avec des matériaux à base de cellulose en utilisant par exemple un procédé d'étiquetage au moulage. Un tel procédé est plus connu sous les initiales IML (de l'anglais In-MoId Labelling).Surprisingly, it has been found that an injectable biodegradable agromaterial, of the type of those described in document FR-2 783 740, binds very well with cellulose-based materials by using, for example, a method of labeling with molding. Such a method is better known under the initials IML (English In-MoId Labeling).
Selon une forme de réalisation préférée, un matériau multicouches selon l'invention est constitué d'une couche d'agromatériau biodégradable, d'une couche de papier ou de film cellulosique ainsi que d'une couche de résine biodégradable, la couche de papier ou de film cellulosique étant en sandwich entre l'agromatériau et la résine.According to a preferred embodiment, a multilayer material according to the invention consists of a layer of biodegradable agromaterial, a layer of paper or cellulosic film and a biodegradable resin layer, the paper layer or cellulosic film being sandwiched between the agromaterial and the resin.
L'agromatériau biodégradable peut être constitué de fibres, d'amidon et d'un adjuvent tel par exemple du PLA (abréviations anglaises de PoIy Lactic Acid ou en français, acide polylactique) ou des polyesters biodégradables. L'agromatériau utilisé ici est constitué de préférence de plus de 90% (sur la matière sèche) de composés issus d'agro-ressources, c'est-à-dire de composants tels par exemple l'amidon, des farines, des fibres, des polyesters biodégradables, etc.. La proportion de ces composés issus d'agroressources peut même être de préférence de 100% mais il peut contenir aussi des composants tels des colorants par exemple non issus d'agro-ressources.The biodegradable agromaterial may consist of fibers, starch and an adjuvant such as for example PLA (English abbreviations of PoIy Lactic Acid or in French, polylactic acid) or biodegradable polyesters. The agromaterial used here preferably consists of more than 90% (on the dry matter) of compounds derived from agro-resources, that is to say from components such as starch, flours, fibers biodegradable polyesters, etc. The proportion of these compounds from agroresources can even be preferably 100% but it can also contain components such as dyes, for example not from agro-resources.
De préférence, l'agromatériau biodégradable est un matériau à base de matière végétale issue d'au moins une plante céréalière entière. Le document FR-2 783 740 indique un procédé pour obtenir de tels matériaux et donne des exemples de tels matériaux. On utilisera ici par exemple un agromatériau biodégradable obtenu à partir de granulats, lesdits granulats présentant une composition telle que (les pourcentages étant exprimés en poids par rapport à la matière sèche) :Preferably, the biodegradable agromaterial is a plant material based on at least one whole cereal plant. FR-2 783 740 discloses a method for obtaining such materials and gives examples of such materials. We will use here for example an agromaterial biodegradable obtained from aggregates, said aggregates having a composition such that (the percentages being expressed by weight relative to the dry matter):
- entre 20% et 60% d'amidon - entre 3% et 20% de protéines- between 20% and 60% starch - between 3% and 20% protein
- entre 15% et 60% de cellulose, d'hémicellulose et de lignine,between 15% and 60% of cellulose, hemicellulose and lignin,
- entre 1% et 15% de lipides, etbetween 1% and 15% of lipids, and
- entre 0,01 % et 10% de sucres.between 0.01% and 10% of sugars.
De tels granulats, ayant éventuellement subi une extrusion, présentent un comportement comparable à celui d'un matériau thermoplastique et peuvent alors être injectés dans un moule. L'utilisation de tels granulats est tout à fait comparable à celle des matières plastiques synthétiques telles le polyéthylène, le polypropylène et le polystyrène.Such granules, having possibly undergone extrusion, exhibit a behavior comparable to that of a thermoplastic material and can then be injected into a mold. The use of such aggregates is quite comparable to that of synthetic plastics such as polyethylene, polypropylene and polystyrene.
On peut utiliser ici, à titre d'exemple non limitatif, des matériaux tels ceux obtenus lors de la mise en œuvre des procédés décrits dans les exemples 1 à 4 du document FR-2 783 740.Materials such as those obtained during the implementation of the methods described in Examples 1 to 4 of document FR-2 783 740 can be used here, by way of nonlimiting example.
Dans le multicouches selon l'invention, l'épaisseur de la couche d'agromatériau dépendra de l'utilisation que l'on souhaite faire du matériau multcouches. En fonction de la résistance mécanique souhaitée, l'agromatériau présentera une épaisseur plus ou moins importante. Dans le domaine de l'emballage, on prévoira par exemple une épaisseur de l'ordre du millimètre ou de quelques millimètres.In the multilayer according to the invention, the thickness of the agromaterial layer will depend on the desired use of the multi-layer material. Depending on the desired strength, the agromaterial will have a greater or lesser thickness. In the field of packaging, for example, a thickness of the order of a millimeter or a few millimeters will be provided.
Le matériau à base de cellulose utilisé pour la réalisation d'un multicouches selon la présente invention est de préférence du papier connu sous le nom de papier kraft. Un tel papier est biodégradable. Le multicouches obtenu en associant le matériau biodégradable décrit ci-avant et le papier kraft sera donc lui aussi biodégradable. Ce type de papier présente également l'avantage d'être très résistant. Il est obtenu avec des pâtes à base de bois traitées à la soude. Le bois utilisé généralement est du bois résineux, de type pin ou sapin. Le papier utilisé ici peut présenter différents grammages en fonction de l'utilisation faite du matériau multicouches. À titre d'exemple non limitatif, le papier kraft utilisé présente un grammage compris entre 40 et 180 g/m2.The cellulose-based material used for making a multilayer according to the present invention is preferably paper known as kraft paper. Such paper is biodegradable. The multilayer obtained by combining the biodegradable material described above and the kraft paper will therefore also be biodegradable. This type of paper also has the advantage of being very resistant. It is obtained with pasta based on wood treated with soda. The wood used generally is softwood, type pine or fir. The paper used here can have different weights depending on the use of the multilayer material. By way of non-limiting example, the kraft paper used has a basis weight of between 40 and 180 g / m 2 .
Enfin, la résine utilisée est elle aussi de préférence biodégradable. Une telle résine est par exemple connue sous la marque déposée NatureFlex et commercialisée par la Société Innovia.Finally, the resin used is also preferably biodegradable. Such a resin is for example known under the trade name NatureFlex and marketed by Innovia.
On peut citer ici à titre d'exemple non limitatif l'utilisation d'un film biodégradable tel que décrit dans le document WO-2009/024812, pour réaliser la couche de résine. Le terme résine est utilisé ici dans son sens large et désigne ici une matière organique solide, semi-solide ou pseudo-solide qui présente une tendance à fluer lorsqu'elle est soumise à une contrainte.By way of nonlimiting example, mention may be made of the use of a biodegradable film as described in document WO-2009/024812, for producing the resin layer. The term "resin" is used here in its broad sense and here designates a solid, semi-solid or pseudo-solid organic material which has a tendency to flow when it is stressed.
Le matériau multicouches décrit ici, comportant une couche d'agromatériau biodégradable, une couche de papier kraft et une couche de résine sous forme d'un film commercialisé sous la marque NatureFlex est un matériau biodégradable selon la norme NF EN 13432.The multilayer material described here, comprising a layer of biodegradable agromaterial, a layer of kraft paper and a layer of resin in the form of a film marketed under the trademark NatureFlex is a biodegradable material according to standard NF EN 13432.
Pour réaliser un matériau multicouches selon la présente invention, il est proposé d'utiliser un procédé du type étiquetage au moulage en l'adaptant toutefois. Un produit multicouches selon l'invention comporte d'une part une couche d'agromatériau et d'autre part une couche de papier, ou de film cellulosique, associée à une résine. Lorsque le papier (ou le film cellulosique) est associé à une résine, celle-ci recouvre uniquement une face de la couche de papier ou du film cellulosique et l'autre face de cette couche, non recouverte de résine, vient au contact direct de l'agromatériau biodégradable.In order to produce a multilayer material according to the present invention, it is proposed to use a method of the labeling-molding type, while adapting it, however. A multilayer product according to the invention comprises firstly an agromaterial layer and secondly a layer of paper, or cellulosic film, associated with a resin. When the paper (or cellulosic film) is associated with a resin, it covers only one side of the layer of paper or cellulosic film and the other side of this layer, not covered with resin, comes into direct contact with biodegradable agromaterial.
Le procédé d'étiquetage au moulage, connu également sous les initiales IML pour In-MoId Labelling, consiste à déposer une étiquette en matière synthétique dans un outillage d'injection lors de la fabrication d'un emballage, lui aussi en matière synthétique. Il n'est pas du tout habituel d'utiliser un tel procédé avec du papier ou un film cellulosique. En outre, quand il s'agit d'un étiquetage, l'étiquette est bien entendu collée sur la face extérieure de l'emballage pour être visible du consommateur.The method of molding labeling, also known under the initials IML for In-MoId Labeling, consists in depositing a plastic label in an injection tool during the manufacture of a packaging, also made of synthetic material. It is not at all common to use such a process with paper or cellulosic film. In addition, when it comes to labeling, the label is of course glued to the outside of the package to be visible to the consumer.
La présente invention propose de manière originale d'utiliser un procédé issu du procédé IML. Il est proposé ici de placer dans le moule une feuille de matériau à base de cellulose, associée ou non à de la résine, notamment sous forme de film, dans l'outillage d'injection, une face de matériau à base de cellulose non recouvert se trouvant à l'intérieur de l'outillage. En outre, contrairement à un procédé IML habituellement utilisé, la couche de matériau à base de cellulose est déposée sur la paroi de l'outillage correspondant à la face intérieure de l'emballage (et non pas sa face extérieure).The present invention proposes in an original way to use a process resulting from the IML process. It is proposed here to place in the mold a sheet of cellulose-based material, associated or not with resin, especially in the form of a film, in the injection tooling, an uncoated cellulose-based material face. located inside the tooling. In addition, unlike an IML process usually used, the layer of cellulose-based material is deposited on the wall of the tool corresponding to the inner face of the package (and not its outer face).
Une fois l'outillage d'injection garni de la feuille à base de cellulose, de l'agromatériau biodégradable est injectée dans l'outillage par un procédé classique d'injection, connu de l'homme du métier et non décrit en détail ici.Once the injection equipment has been filled with cellulose-based foil, the biodegradable agromaterial is injected into the tooling by a conventional injection method known to those skilled in the art and not described in detail here.
On obtient ainsi un matériau multicouches selon l'invention avec une excellente liaison entre le matériau à base de cellulose, par exemple papier, papier kraft ou film cellulosique, et l'agromatériau biodégradable qui a été injecté.A multilayer material according to the invention is thus obtained with excellent bonding between the cellulose-based material, for example paper, kraft paper or cellulosic film, and the biodegradable agromaterial which has been injected.
Le multicouches ainsi obtenu permet de réaliser une barrière aux gaz et d'obtenir une bonne étanchéité à l'eau.The multilayer thus obtained makes it possible to provide a gas barrier and to obtain a good watertightness.
Ce matériau multicouches est bien adapté pour la réalisation d'emballages, notamment dans le domaine de l'alimentaire mais d'autres utilisations peuvent être envisagées.This multilayer material is well suited for the production of packaging, particularly in the field of food but other uses may be considered.
Pour un emballage, il est préférable de prévoir un étiquetage et/ou une décoration. Il est possible de rajouter sur la résine un nouveau complexe, formé par exemple d'un film cellulosique et d'une feuille de papier, pour décorer et/ou étiqueter l'emballage. On aurait donc ainsi un matériau multicouches, comportant dans l'ordre suivant une couche d'agromatériau biodégradable, une couche fine à base de cellulose telle par exemple une feuille de papier ou un film cellulosique, puis un film de résine biodégradable, lui-même recouvert d'un film cellulosique et enfin d'un papier.For a package, it is preferable to provide labeling and / or decoration. It is possible to add to the resin a new complex, formed for example of a cellulosic film and a sheet of paper, to decorate and / or label the package. There would thus be a multilayer material, comprising in the following order a layer of biodegradable agromaterial, a thin layer based on cellulose such as for example a sheet of paper or a cellulosic film, then a biodegradable resin film, itself covered with a cellulosic film and finally a paper.
De toute façon, la présente invention ne se limite pas aux formes de réalisation préférées décrites ci-dessus à titre d'exemples non limitatifs. Elle concerne également toutes les variantes de réalisation à la portée de l'homme du métier dans le cadre des revendications ci-après.In any case, the present invention is not limited to the preferred embodiments described above by way of non-limiting examples. It also relates to all the variants within the scope of those skilled in the art within the scope of the claims below.
Ainsi par exemple, d'autres procédés pourraient être mis en œuvre pour obtenir un matériau multicouches selon la présente invention. Dans un tel matériau, de nombreuses variantes d'agromatériau peuvent être utilisées. Le matériau à base de cellulose est de préférence du papier, notamment du papier kraft pour sa grande résistance mécanique et son caractère biodégradable mais d'autres matériaux à base de cellulose, de préférence biodégradables, peuvent être envisagés. Les exemples de résines utilisées sont également donnés à titre illustratifs et ne sont pas limitatifs. En fonction des caractéristiques que l'on souhaite obtenir, par exemple barrière à certains gaz, le choix des résines peut être adapté. La résine peut, au lieu de se présenter sous la forme d'un film, être pulvérisée par exemple à la surface du papier ou être associée au papier de toute autre manière. For example, other methods could be implemented to obtain a multilayer material according to the present invention. In such a material, many variants of agromaterial can be used. The cellulose-based material is preferably paper, especially kraft paper for its high mechanical strength and biodegradability, but other cellulose-based materials, preferably biodegradable, can be envisaged. The examples of resins used are also given for illustrative purposes and are not limiting. Depending on the characteristics that one wishes to obtain, for example barrier to certain gases, the choice of resins can be adapted. The resin may, instead of being in the form of a film, be sprayed for example on the surface of the paper or associated with the paper in any other way.

Claims

REVENDICATIONS
1. Matériau multicouches comportant une première couche d'agromatériau biodégradable réalisée à base d'au moins 90% d'agro-ressources, caractérisé en ce que ladite première couche est associée à une seconde couche de matériau à base de cellulose sur une face, en ce que la seconde couche à base de cellulose est recouverte d'une résine biodégradable du côté opposé à la première couche.Multilayer material comprising a first biodegradable agromaterial layer made from at least 90% agro-resources, characterized in that said first layer is associated with a second layer of cellulose-based material on one side, in that the second cellulose-based layer is covered with a biodegradable resin on the opposite side to the first layer.
2. Matériau multicouches selon la revendication 1 , caractérisé en ce que le matériau à base de cellulose utilisé est du papier.Multilayer material according to claim 1, characterized in that the cellulose-based material used is paper.
3. Matériau multicouches selon la revendication 2, caractérisé en ce que le papier utilisé est du papier kraft.3. Multilayer material according to claim 2, characterized in that the paper used is kraft paper.
4. Matériau multicouches selon la revendication 1 , caractérisé en ce que la seconde couche à base de cellulose est constituée d'un film cellulosique. 4. Multilayer material according to claim 1, characterized in that the second cellulose-based layer consists of a cellulosic film.
5. Matériau multicouches selon l'une des revendications 1 à 4, caractérisé en ce que la couche d'agromatériau biodégradable présente la composition suivante, les pourcentages étant exprimés en poids de la matière sèche :5. Multilayer material according to one of claims 1 to 4, characterized in that the biodegradable agromaterial layer has the following composition, the percentages being expressed by weight of the dry matter:
- entre 20% et 60% d'amidon, - entre 3% et 20% de protéines,between 20% and 60% of starch, between 3% and 20% of proteins,
- entre 15% et 60% de cellulose, d'hémicellulose et de lignine, -entre 1 % et 15% de lipides, etbetween 15% and 60% of cellulose, hemicellulose and lignin, between 1% and 15% of lipids, and
- entre 0,01% et 10% de sucres.between 0.01% and 10% of sugars.
6. Matériau multicouches selon l'une des revendications 1 à 5, caractérisé en ce que la résine biodégrable est recouverte à son tour d'une couche extérieure.6. Multilayer material according to one of claims 1 to 5, characterized in that the biodegradable resin is in turn covered with an outer layer.
7. Matériau multicouches selon l'une des revendications 1 à 6, caractérisé en ce qu'il est réaliser sans utilisation d'adhésif entre les différentes couches de matériaux énoncées. 7. Multilayer material according to one of claims 1 to 6, characterized in that it is achieved without the use of adhesive between the different layers of materials stated.
8. Procédé de réalisation d'un matériau multicouches, caractérisé en ce qu'il consiste à disposer dans un moule une feuille de matériau à base de cellulose recouverte sur une face d'une résine de telle sorte que ladite feuille recouvre au moins partiellement une paroi du moule et que la face recouverte de résine soit orientée vers la paroi du moule, puis à injecter une matière biodégradable réalisée à base d'au moins 90% d'agro-ressources selon un procédé d'étiquetage au moulage, la matière injectée venant au contact de la feuille de matériau à base de cellulose.8. A method of producing a multilayer material, characterized in that it consists in placing in a mold a sheet of cellulose-based material covered on one side with a resin such that said sheet covers at least partially a mold wall and that the resin coated side is oriented towards the wall of the mold, and then to inject a material biodegradable based on at least 90% agro-resources according to a molding labeling method, the injected material coming into contact with the sheet of cellulose-based material.
9. Procédé de réalisation selon la revendication 8, caractérisé en ce que le matériau à base de cellulose utilisé est un papier kraft.9. Production method according to claim 8, characterized in that the cellulose-based material used is a kraft paper.
10. Procédé de réalisation selon la revendication 8, caractérisé en ce que le matériau à base de cellulose utilisé est un film cellulosique.10. Production method according to claim 8, characterized in that the cellulose-based material used is a cellulosic film.
11. Procédé de réalisation selon l'une des revendications 8 à 10, caractérisé en ce que la résine se présente sur la forme d'un film fixé sur une face de la feuille de matériau à base de cellulose.11. Production method according to one of claims 8 to 10, characterized in that the resin is in the form of a film attached to one side of the sheet of cellulose-based material.
12. Barquette destinée à l'emballage de produits alimentaires, caractérisée en ce qu'elle est réalisée dans un matériau multicouche selon l'une des revendications 1 à 7.12. Tray for packaging food products, characterized in that it is made of a multilayer material according to one of claims 1 to 7.
13. Barquette selon la revendication 12, caractérisée en ce que le matériau à base de cellulose et la résine sont disposés à l'intérieur de la barquette.Tray according to claim 12, characterized in that the cellulose-based material and the resin are arranged inside the tray.
14. Barquette selon l'une des revendications 12 ou 13, caractérisée en ce que le matériau à base de cellulose et la résine utilisés sont formés par un complexe de papier kraft associé à une résine biodégradable sous forme de film. 14. Tray according to one of claims 12 or 13, characterized in that the cellulose-based material and the resin used are formed by a complex of kraft paper associated with a biodegradable resin in film form.
15. Barquette selon l'une des revendications 12 à 14, caractérisé en ce que son fond est recouvert d'une étiquette ou d'une décoration. 15. Tray according to one of claims 12 to 14, characterized in that its bottom is covered with a label or a decoration.
PCT/FR2010/000469 2009-06-26 2010-06-24 Biodegradable multilayer material and method of obtaining such a material WO2010149884A1 (en)

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FR0903124A FR2947205B1 (en) 2009-06-26 2009-06-26 BIODEGRADABLE MULTILAYER MATERIAL AND PROCESS FOR OBTAINING SUCH MATERIAL
FR0903124 2009-06-26

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CN103917346A (en) * 2011-07-07 2014-07-09 日本写真印刷株式会社 In-mold decorative fiber molded article and manufacturing method for same
FR2981005B1 (en) 2011-10-11 2013-11-08 Yves Boulard BIODEGRADABLE FOOD VEGETABLE FOLIAGE LAMINATE, IN PARTICULAR FOR THE MANUFACTURE OF CONTAINERS
FR3068337B1 (en) * 2017-06-28 2021-01-29 Vegeplast BIODEGRADABLE PACKAGING, ITS MANUFACTURING PROCESS AND ITS USES
WO2024061973A1 (en) * 2022-09-22 2024-03-28 Novamont S.P.A. Moulded items including a barrier label

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FR2783740A1 (en) 1998-09-24 2000-03-31 Cooperative Agricole Vivadour MATERIAL BASED ON PLANT MATERIAL FROM CEREAL PLANTS AND PROCESS FOR OBTAINING SAME
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US5736204A (en) * 1992-10-16 1998-04-07 The Estate Of Leonard Pearlstein Compostable packaging for containment of liquids
FR2783740A1 (en) 1998-09-24 2000-03-31 Cooperative Agricole Vivadour MATERIAL BASED ON PLANT MATERIAL FROM CEREAL PLANTS AND PROCESS FOR OBTAINING SAME
FR2821712A1 (en) * 1999-12-02 2002-09-13 Cartonnerie H Oudin Plant pot made from sheet of water-repellent biodegradable material such as treated cellulose fibres, paper and plastic film
WO2006059112A2 (en) * 2004-12-04 2006-06-08 Korde, Shree, Prakash Improvements in or relating to biodegradable composites
FR2903041A1 (en) * 2006-07-03 2008-01-04 Europlastiques Soc Par Actions Manufacturing a container or a lid for a package, comprises injecting a polypropylene material and a biodegradable material, forming a label using high density polyethylene, and placing a label in a mold
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WO2009024812A1 (en) 2007-08-23 2009-02-26 Innovia Films Limited Packaging article

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FR2947205A1 (en) 2010-12-31

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