FR2966170A1 - Producing a material made of natural fibers, comprises preparing a tissue of dry natural fibers, aqueous impregnation for the activation of the pectin, compacting impregnated tissue, and heating - Google Patents

Producing a material made of natural fibers, comprises preparing a tissue of dry natural fibers, aqueous impregnation for the activation of the pectin, compacting impregnated tissue, and heating Download PDF

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FR2966170A1
FR2966170A1 FR1058468A FR1058468A FR2966170A1 FR 2966170 A1 FR2966170 A1 FR 2966170A1 FR 1058468 A FR1058468 A FR 1058468A FR 1058468 A FR1058468 A FR 1058468A FR 2966170 A1 FR2966170 A1 FR 2966170A1
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natural fibers
producing
material based
heating
pectin
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FR2966170B1 (en
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Marc Depestele
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HOLDING DEPESTELE STE
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HOLDING DEPESTELE STE
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/14—Processes for the fixation or treatment of textile materials in three-dimensional forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
    • C08J2305/06—Pectin; Derivatives thereof

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Producing a material made of natural fibers, comprises: preparing a tissue of dry natural fibers; step of aqueous impregnation for the activation of the pectin; a step of compacting tissue thus impregnated; and heating at a temperature greater than the vaporization temperature of the aqueous solution for evaporating the aqueous solution, where the process does not comprise the step of pectin extraction.

Description

PROCEDE DE PRODUCTION D'UN MATERIAU A BASE DE FIBRES NATURELLES Domaine de l'invention PROCESS FOR PRODUCING A MATERIAL BASED ON NATURAL FIBERS Field of the invention

La présente invention concerne le domaine des matériaux à base de fibres naturelles et plus particulièrement de fibres végétales, préférentiellement de fibres de lin. Etat de la technique The present invention relates to the field of materials based on natural fibers and more particularly vegetable fibers, preferably flax fibers. State of the art

L'utilisation de fibres naturelles, végétales et de fibres de lin pour la réalisation de matériaux tels que des plaques ou des pièces de garnitures pour 15 l'automobile est connue. La demande de brevet internationale WO03091006 décrit un matériau composite comprenant des matières fibreuses obtenues à partir de fibres naturelles telles que du lin, et une résine thermoplastique. Le procédé décrit prévoit la fabrication à l'aide d'une filière. Il comprend des étapes de séparation de la tige et 20 de sa capsule, d'alignement des tiges suivant la ligne de fabrication du produit, de séparation des fibres et du bois contenu dans la tige, et une étape d'imprégnation des fibres avec une résine jouant le rôle de matrice pour un conditionnement sous forme de fil ou de ruban souple. Le brevet français FR2781492 décrit un matériau thermoplastique 25 composite contenant des fibres d'origine végétale et une matrice polypropylène. La demande de brevet internationale WOOO/005294 décrit un matériau thermoplastique composite comprenant un en mélange une matière thermoplastique et des fibres de chanvre d'une longueur inférieure ou égal à 0,2 mm. Le brevet britannique GB241864 décrit un matériau constitué par une 30 couche épaisse d'un matériau thermoformé de fibres associé à une couche de micro-fibres agrégées. Le brevet britannique GB240215 décrit un matériau d'emballage biodégradable laminé constitué par une couche de fibres naturelles et une couche à base de latex.10 Le brevet EP0671259 décrit un matériau multicouche laminé pour réaliser un revêtement interne pour véhicules automobiles, constitué par un support et une couche externe décorative. Le support est constitué d'une couche formant noyau, à base de fibres naturelles et de couches de revêtement laminées. Inconvénients de l'état de la technique The use of natural, vegetable and flax fibers for producing materials such as plates or trim parts for the automobile is known. International Patent Application WO03091006 discloses a composite material comprising fibrous materials obtained from natural fibers such as linen, and a thermoplastic resin. The process described provides for the manufacture using a die. It comprises steps of separating the stem and its capsule, aligning the stems along the product line, separating the fibers and the wood contained in the stem, and a step of impregnating the fibers with a resin acting as a matrix for packaging in the form of wire or flexible ribbon. FR2781492 discloses a composite thermoplastic material containing plant-derived fibers and a polypropylene matrix. International Patent Application WO00 / 005294 discloses a composite thermoplastic material comprising a blend of a thermoplastic material and hemp fibers of a length less than or equal to 0.2 mm. GB241864 discloses a material consisting of a thick layer of a thermoformed material of fibers associated with an aggregate micro-fiber layer. GB240215 discloses a laminated biodegradable packaging material consisting of a layer of natural fibers and a latex-based layer. EP0671259 discloses a laminated multilayer material for producing an internal coating for motor vehicles, consisting of a support and a a decorative outer layer. The support consists of a core layer, based on natural fibers and laminated coating layers. Disadvantages of the state of the art

Les différentes solutions proposées dans l'art antérieur présentent l'inconvénient d'utiliser des liants organiques. II ne s'agit donc pas de matériaux 10 biodégradables ni compostables, The different solutions proposed in the prior art have the disadvantage of using organic binders. They are therefore not biodegradable or compostable materials,

Solution apportée par l'invention Solution provided by the invention

L'invention vise à remédier à cet inconvénient en proposant un 15 procédé de production d'un matériau totalement biodégradable, sans adjonction d'un quelconque liant organique. A cet effet, l'invention concerne selon son acception la plus générale un procédé de production d'un matériau à base de fibres naturelles caractérisé en ce qu'il comporte une étape de préparation d'un tissu de fibres naturelles sèches, une 20 étape d'imprégnation aqueuse pour l'activation de la pectine, une étape de compactage du tissu ainsi imprégné, et une étape de chauffage à une température supérieure à la température de vaporisation de ladite solution aqueuse pour l'évaporation de ladite solution aqueuse, ledit procédé ne comportant pas d'étape d'extraction de la pectine. 25 Ce procédé va à l'encontre de l'enseignement de l'art antérieur, proposant généralement une étape de suppression de la pectine. Elle permet d'assurer la liaison des fibres naturelles par des moyens exclusivement biologiques. De préférence, ladite étape d'imprégnation est appliquée pendant une durée comprise entre 1 minute et 30 minutes. 30 Selon un mode de réalisation particulier, lesdites étapes d'imprégnation, de chauffage et de compactage sont toutes réalisées dans un moule. Avantageusement, l'étape de compactage est réalisée dans un moule rigide comportant au moins une empreinte chauffante. Selon une première particulière, l'étape de compactage est réalisée5 avec une membrane associée à un moyen de mise sous dépression. Selon une deuxième variante, l'étape de compactage est réalisée dans un moule rigide, l'étape de chauffage étant réalisée dans une enceinte thermique. The invention aims to overcome this disadvantage by proposing a method for producing a completely biodegradable material, without adding any organic binder. To this end, the invention relates, in its most general sense, to a process for producing a material based on natural fibers, characterized in that it comprises a step of preparing a fabric of dry natural fibers, a step aqueous impregnation for the activation of pectin, a step of compacting the thus impregnated fabric, and a step of heating at a temperature above the vaporization temperature of said aqueous solution for the evaporation of said aqueous solution, said method not having a pectin extraction step. This method goes against the teachings of the prior art, generally providing a pectin removal step. It makes it possible to ensure the binding of natural fibers by exclusively biological means. Preferably, said impregnation step is applied for a period of between 1 minute and 30 minutes. According to a particular embodiment, said impregnation, heating and compacting steps are all carried out in a mold. Advantageously, the compaction step is carried out in a rigid mold comprising at least one heating footprint. According to a particular first, the compacting step is carried out with a membrane associated with a means of putting under vacuum. According to a second variant, the compaction step is carried out in a rigid mold, the heating step being carried out in a thermal enclosure.

Selon une troisième variante, l'étape de compactage et de chauffage est réalisée par calandrage. Selon une quatrième variante, l'étape de compactage et de chauffage est réalisée dans une enceinte sous pression. Selon un mode de mise en ceuvre particulier, l'étape d'imprégnation 10 est réalisée par une solution ou une vapeur aqueuse. Selon une variante particulière, le procédé selon l'invention comporte une étape de mise en forme additionnelle, après évaporation du milieu aqueux. Selon une autre variante de réalisation, le procédé comporte une étape de mise en forme additionnelle, avant évaporation du milieu aqueux. 15 Selon un mode de réalisation préféré, les fibres naturelles sont des fibres de lin, de préférence d'une longueur d'environ un mètre ; selon un mode de réalisation préférentiel, la longueur des fibres de lin est de quatre-vingt centimètres. L'invention concerne également un matériau à base de fibres naturelles caractérisé en ce qu'il est préparé par un procédé comportant une étape 20 de préparation d'un tissu de fibres naturelles sèches, une étape d'imprégnation aqueuse pour l'activation de la pectine, une étape de compactage du tissu ainsi imprégné, et une étape de chauffage à une température supérieure à la température de vaporisation de ladite solution aqueuse pour l'évaporation de ladite solution aqueuse, ledit procédé ne comportant pas d'étape d'extraction de la pectine. 25 L'invention concerne également l'application du procédé susvisé pour la fabrication de récipients à base de fibres naturelles. According to a third variant, the compaction and heating step is carried out by calendering. According to a fourth variant, the compaction and heating step is carried out in a pressure vessel. According to a particular mode of implementation, the impregnation step 10 is carried out by a solution or an aqueous vapor. According to a particular variant, the process according to the invention comprises an additional shaping step, after evaporation of the aqueous medium. According to another variant embodiment, the method comprises an additional shaping step, before evaporation of the aqueous medium. According to a preferred embodiment, the natural fibers are flax fibers, preferably of a length of about one meter; according to a preferred embodiment, the length of the flax fibers is eighty centimeters. The invention also relates to a material based on natural fibers, characterized in that it is prepared by a process comprising a step 20 for preparing a fabric of dry natural fibers, an aqueous impregnation step for the activation of the pectin, a step of compacting the thus impregnated fabric, and a step of heating at a temperature above the vaporization temperature of said aqueous solution for the evaporation of said aqueous solution, said process having no step of extraction of pectin. The invention also relates to the application of the abovementioned process for the manufacture of containers based on natural fibers.

Description détaillée d'un exemple de réalisation non limitatif L'invention sera mieux comprise à la description qui suit, se référent à un exemple non limitatif de réalisation, La préforme selon l'exemple décrit est constitué d'un empilement de nappes de fibres de lin. 30 L'empilement de nappes tissées est constitué par des entrelacements de rubans de fibres de lin non coupées, alignées parallèlement entre elles, d'une largeur de quelques millimètres. Elles peuvent également associer d'autres fibres telles que des fibres de chanvre, ou encore de bamboo. Les fibres ne sont pas soumises à une torsion afin de conserver les qualités mécaniques des fibres longues. Elle présente une épaisseur de quelques centimètres, par exemple entre 1 et 10 centimètres. La préforme peut être stockée et expédiée sous forme de rouleaux. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The invention will be better understood from the description which follows, with reference to a non-limiting example of embodiment. The preform according to the example described consists of a stack of layers of linen. The stack of woven webs is constituted by interlacing strips of uncut linen fibers, aligned parallel to each other, with a width of a few millimeters. They can also combine other fibers such as hemp fiber, or bamboo. The fibers are not twisted to maintain the mechanical properties of the long fibers. It has a thickness of a few centimeters, for example between 1 and 10 centimeters. The preform can be stored and shipped as rolls.

Elle est utilisée pour fabriquer des plaques ou des pièces de forme quelconque. II est possible de former des courbures avec des rayons faibles. Les fibres de lin glissent alors les unes par rapport aux autres, parallèlement entre elles. L'ensemble est ensuite mouillé avec une solution aqueuse, de l'eau ou de la vapeur d'eau afin de dissoudre la pectine entourant les fibres de lin. Le chauffage active la dissolution et provoque ensuite l'évaporation de l'eau, ce qui conduit la pectine à se reconfigurer pour lier les fibres constituant les nappes. L'ensemble est mis sous pression à des pressions comprises entre 1 et 15 bars, ce qui produit un compactage de l'ensemble. Les plaques ou pièces ainsi produites à partir des préformes selon l'invention constitue des pièces solides permettant de réaliser des garnitures pour des véhicules automobiles, ferroviaires ou nautiques, des emballages, des tablettes de rayonnage ou des matériaux de construction ou d'ameublement. It is used to make plates or parts of any shape. It is possible to form curvatures with weak rays. The linen fibers then slide relative to each other, parallel to each other. The mixture is then wetted with an aqueous solution, water or steam to dissolve the pectin surrounding the flax fibers. The heating activates the dissolution and then causes the evaporation of the water, which causes the pectin to reconfigure itself to bind the fibers constituting the layers. The assembly is pressurized at pressures between 1 and 15 bar, which produces a compaction of the assembly. The plates or parts thus produced from the preforms according to the invention constitute solid parts for making trim for motor vehicles, rail or water, packaging, shelf shelves or building materials or furniture.

30 30

Claims (4)

REVENDICATIONS1 - Procédé de production d'un matériau à base de fibres naturelles caractérisé en ce qu'il comporte une étape de préparation d'un tissu de fibres naturelles sèches, une étape d'imprégnation aqueuse pour l'activation de la pectine, une étape de compactage du tissu ainsi imprégné, et une étape de chauffage à une température supérieure à la température de vaporisation de-ladite solution aqueuse pour l'évaporation de ladite solution aqueuse, ledit procédé ne comportant pas 10 d'étape d'extraction de la pectine. CLAIMS 1 - Process for producing a material based on natural fibers characterized in that it comprises a step of preparing a dry natural fiber fabric, an aqueous impregnation step for the activation of pectin, a step compacting the thus impregnated fabric, and a heating step at a temperature above the vaporization temperature of said aqueous solution for evaporation of said aqueous solution, said process having no pectin extraction step . 2 - Procédé de production d'un matériau à base de fibres naturelles selon la revendication précédente caractérisé en ce que ladite étape d'imprégnation est appliquée pendant une durée comprise entre 1 minute et 30 minutes. 2 - Process for producing a material based on natural fibers according to the preceding claim characterized in that said impregnation step is applied for a period of between 1 minute and 30 minutes. 3 - Procédé de production d'un matériau à base de fibres naturelles 15 selon la revendication 1 ou 2 caractérisé en ce que lesdites étapes d'imprégnation, de chauffage et de compactage sont toutes réalisées dans un moule. 3 - Process for producing a material based on natural fibers 15 according to claim 1 or 2 characterized in that said impregnation steps, heating and compaction are all carried out in a mold. 4 - Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications précédentes caractérisé en ce que l'étape de compactage est réalisée dans un moule rigide comportant au moins une 20 empreinte chauffante. - Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications 1 à 3 caractérisé en ce que l'étape de compactage est réalisée avec une membrane associée à un moyen de mise sous dépression. 25 6 - Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications 1 à 3 caractérisé en ce que l'étape de compactage est réalisée dans un moule rigide, l'étape de chauffage étant réalisée dans une enceinte thermique. 7 - Procédé de production d'un matériau à base de fibres naturelles 30 selon l'une quelconque des revendications 1 à 3 caractérisé en ce que l'étape de compactage et de chauffage est réalisée par calandrage. 8 - Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications 1 à 3 caractérisé en ce que l'étape de compactage et de chauffage est réalisée dans une enceinte sous pression.- Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications précédentes caractérisé en ce que l'étape d'imprégnation est réalisée par une solution ou une vapeur aqueuse. 10 - Procédé de production d'un matériau à base de fibres naturelles selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte une étape de mise en forme additionnelle, après évaporation du milieu aqueux. 11 - Procédé de production d'un matériau à base de fibres naturelles 10 selon l'une quelconque des revendications 1 à 9 caractérisé en ce qu'il comporte une étape de mise en forme additionnelle, avant évaporation du milieu aqueux. 12 - Matériau à base de fibres naturelles caractérisé en ce qu'il est préparé par un procédé comportant une étape de préparation d'un tissu de fibres naturelles sèches, une étape d'imprégnation aqueuse pour l'activation de la pectine, 15 une étape de compactage du tissu ainsi imprégné, et une étape de chauffage à une température supérieure à la température de vaporisation de ladite solution aqueuse pour l'évaporation de ladite solution aqueuse, ledit procédé ne comportant pas d'étape d'extraction de la pectine. 13 - Application du procédé conforme à l'une au moins des 20 revendications 1 à 11 pour la fabrication de récipients à base de fibres naturelles. 4 - Process for producing a material based on natural fibers according to any one of the preceding claims, characterized in that the compaction step is carried out in a rigid mold comprising at least one heating footprint. - Process for producing a material based on natural fibers according to any one of claims 1 to 3 characterized in that the compaction step is carried out with a membrane associated with a means for putting under vacuum. 6 - Process for producing a material based on natural fibers according to any one of claims 1 to 3 characterized in that the compaction step is performed in a rigid mold, the heating step being performed in a thermal enclosure. 7 - Process for producing a material based on natural fibers 30 according to any one of claims 1 to 3 characterized in that the compaction step and heating is carried out by calendering. 8 - Process for producing a material based on natural fibers according to any one of claims 1 to 3 characterized in that the compaction step and heating is carried out in a pressure vessel.- Production method of a material based on natural fibers according to any preceding claim characterized in that the impregnation step is performed by a solution or an aqueous vapor. 10 - Process for producing a material based on natural fibers according to any one of the preceding claims characterized in that it comprises an additional forming step, after evaporation of the aqueous medium. 11 - Process for producing a material based on natural fibers 10 according to any one of claims 1 to 9 characterized in that it comprises an additional shaping step, before evaporation of the aqueous medium. 12 - Material based on natural fibers characterized in that it is prepared by a process comprising a step of preparing a dry natural fiber fabric, an aqueous impregnation step for the activation of pectin, a step compacting the thus impregnated fabric, and a step of heating at a temperature above the vaporization temperature of said aqueous solution for evaporation of said aqueous solution, said process having no pectin extraction step. 13 - Application of the process according to at least one of claims 1 to 11 for the manufacture of containers based on natural fibers.
FR1058468A 2010-10-18 2010-10-18 PROCESS FOR PRODUCING A MATERIAL BASED ON NATURAL FIBERS Active FR2966170B1 (en)

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FR1058468A FR2966170B1 (en) 2010-10-18 2010-10-18 PROCESS FOR PRODUCING A MATERIAL BASED ON NATURAL FIBERS

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2963170A1 (en) * 2011-11-07 2016-01-06 Faurecia Automotive Industrie Continuous web of fibres comprising natural long fibres

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB732921A (en) * 1952-09-29 1955-06-29 Leonard Gould & Company Ltd A method of producing a packing for fragile articles
NL8502594A (en) * 1985-09-20 1987-04-16 Johannes Franciscus Roeloffzen Utensil for disposal of-dog faeces - has telescopic handle clamping disposable and biodegradable pan consisting of pressed vegetable fibres with bonding agent
DE4242538A1 (en) * 1992-12-16 1993-06-09 Thueringisches Institut Fuer Textil- Und Kunststoff-Forschung E.V., O-6822 Rudolstadt, De Fibre bonding - uses pectin and compression to form sheet of flax jute or hemp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB732921A (en) * 1952-09-29 1955-06-29 Leonard Gould & Company Ltd A method of producing a packing for fragile articles
NL8502594A (en) * 1985-09-20 1987-04-16 Johannes Franciscus Roeloffzen Utensil for disposal of-dog faeces - has telescopic handle clamping disposable and biodegradable pan consisting of pressed vegetable fibres with bonding agent
DE4242538A1 (en) * 1992-12-16 1993-06-09 Thueringisches Institut Fuer Textil- Und Kunststoff-Forschung E.V., O-6822 Rudolstadt, De Fibre bonding - uses pectin and compression to form sheet of flax jute or hemp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2963170A1 (en) * 2011-11-07 2016-01-06 Faurecia Automotive Industrie Continuous web of fibres comprising natural long fibres

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