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WO1996013365A1 - Material made from coconut waste - Google Patents

Material made from coconut waste Download PDF

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Publication number
WO1996013365A1
WO1996013365A1 PCT/FR1994/001262 FR9401262W WO9613365A1 WO 1996013365 A1 WO1996013365 A1 WO 1996013365A1 FR 9401262 W FR9401262 W FR 9401262W WO 9613365 A1 WO9613365 A1 WO 9613365A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibers
coconut
marrow
small pieces
binder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FR1994/001262
Other languages
French (fr)
Inventor
Ayikoué Assiagnon ATAYI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR9304706A priority Critical patent/FR2704175A1/en
Priority claimed from FR9304706A external-priority patent/FR2704175A1/en
Application filed by Individual filed Critical Individual
Priority to PCT/FR1994/001262 priority patent/WO1996013365A1/en
Publication of WO1996013365A1 publication Critical patent/WO1996013365A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres

Definitions

  • the present invention relates to a material obtained from coconut residues impregnated and bonded together by a polymerized binder.
  • the present invention therefore provides a material obtained from coconut residues, impregnated and bonded together by a polymerized binder, this material having for the particularity that said residues comprise at least 10% by weight of small pieces of "marrow" or vegetable material which is formed between the fibers enveloping the coconut, these pieces having a maximum dimension of 0.2 to 2 mm and a dimension minimum greater than a third of their maximum dimension.
  • the residues comprise at least 50% by weight of said small pieces of "marrow".
  • the properties of the material can be further improved if it is expected that the residues further comprise up to 50% by weight of short coconut fibers 2 to 5 mm in length and 0.1 to 0 in diameter , 4 mm.
  • Short coconut fibers can be either roughly oriented or randomly oriented, depending on the intended use.
  • the residues further comprise up to 50% of long coconut fibers of length 50 to 150 mm and of diameter 0.1 to 0 , 4 mm.
  • long fibers can be analogous to that described in EP-A-0404679 mentioned above, the mixture of small pieces of marrow, and possibly short fibers with the binder then behaving like a binder containing a filler , as is well known.
  • the compressive strength of the material according to the invention can be further increased if it is expected that the residues comprise up to 30% by weight of coconut shell crushed to an average dimension of 0, 2 to 2 mm.
  • the crushed coconut shell is a rigid material, therefore with properties clearly different from the flexibility of the cord and the flexibility of the fibers, the dosage of the various components therefore makes it possible to adapt in a wide range the properties of the material obtained to the requirements of the user.
  • the invention also provides a process for obtaining a material of the composition that has just been described, this material comprising the following steps:
  • step 4) of this process is replaced by a step 4 ') consisting of shaping the mixture by hot extrusion, then allowing the binder to polymerize.
  • the first method makes it possible to obtain, in particular, blocks or plates.
  • the second method makes it possible to obtain profiles, and in particular tubes, with particularly advantageous characteristics.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

A material made from small pieces of 'pith', the vegetable matter formed between the fibres surrounding coconuts, and having a size of 0.2-2 mm and a corklike texture. The pieces are coated with a binder and polymerised. The small pieces of pith may then be combined with short and/or long coconut fibres, and/or with finely ground coconut husks. The resulting material is compact, impervious, rot-proof, insect-proof and non-flammable. Densities of around 0.7 kg/dm<3> are achieved.

Description

Matériau obtenu à partir de résidus de noix de coco. Material obtained from coconut residues.

La présente invention est relative à un matériau obtenu à partir de résidus de noix de coco imprégnés et liés entre eux par un liant polymérisé-The present invention relates to a material obtained from coconut residues impregnated and bonded together by a polymerized binder.

Dans la demande EP-A-0404679, on a décrit un matériau obtenu à partir de fibres végétales, et plus spécialement de fibres de noix de coco, qui sont trempées dans une résine, groupées en paquets, mises en place et pressées dans un moule, puis soumises à un traitement qui pol<jπ»*r'aSβ la résine. La présente invention découle d'observations faites sur les résidus de noix de coco, observations qui ont permis de constater qu'en plus des fibres, on trouvait parmi ces résidus d'autres substances aux propriétés intéressantes. En particulier, on a constaté qu'après séparation des fibres, il subsiste une poussière formée de petits morceaux de ce qu'on a appelé la "moelle", qui est une matière végétale, formée entre les fibres, de dimension maximale 0,2 à 2 mm et de dimension minimale supérieure au tiers de leur dimension maximale, si bien qu'on ne peut absolument pas les qualifier de fibres. La "moelle" a la propriété curieuse d'une consistance analogue à celle du liège, c'est-à-dire qu'elle présente une certaine élasticité lorsqu'on la comprime, ce qui est différent du comportement des fibres. On a constaté que, si on mélange ces moelles avec une résine prépolymère, puis qu'on fait polymériser cette résine sous pression, on obtient un matériau qui présente des propriétés intéressantes. En effet, pour un dosage convenable, il est isolant, ther iquement et électriquement, non combustible, imperméable, imputrescible et n'est pas attaqué par les insectes. Il présente cependant une densité faible, de l'ordre de 0,7 kg par dm3 , cette densité variant, bien évidemment, selon le dosage et la nature du liant. La présente invention fournit donc un matériau obtenu à partir de résidus de noix de coco, imprégnés et liés entre eux par un liant polymérisé, ce matériau ayant pour particularité que lesdits résidus comprennent au moins 10% en poids de petits morceaux de "moelle" ou matière végétale qui se forme entre les fibres enveloppant la noix de coco, ces morceaux ayant une dimension maximale de 0,2 à 2 mm et une dimension minimale supérieure au tiers de leur dimension maximale.In application EP-A-0404679, a material obtained from vegetable fibers, and more especially coconut fibers, which are soaked in a resin, grouped in packages, placed and pressed in a mold, has been described. , then subjected to a treatment which pol <jπ »* r 'aSβ the resin. The present invention follows from observations made on coconut residues, observations which have made it possible to note that in addition to the fibers, there were among these residues other substances with interesting properties. In particular, it has been found that after separation of the fibers, there remains a dust formed of small pieces of what has been called the "marrow", which is a vegetable material, formed between the fibers, of maximum dimension 0.2 at 2 mm and a minimum dimension greater than a third of their maximum dimension, so that they absolutely cannot be described as fibers. The "marrow" has the curious property of a consistency similar to that of cork, that is to say that it has a certain elasticity when it is compressed, which is different from the behavior of the fibers. It has been found that, if these marbles are mixed with a prepolymer resin, and then this resin is polymerized under pressure, a material is obtained which has advantageous properties. Indeed, for a suitable dosage, it is insulating, thermally and electrically, non-combustible, impermeable, rot-proof and is not attacked by insects. However, it has a low density, of the order of 0.7 kg per dm 3 , this density varying, of course, depending on the dosage and the nature of the binder. The present invention therefore provides a material obtained from coconut residues, impregnated and bonded together by a polymerized binder, this material having for the particularity that said residues comprise at least 10% by weight of small pieces of "marrow" or vegetable material which is formed between the fibers enveloping the coconut, these pieces having a maximum dimension of 0.2 to 2 mm and a dimension minimum greater than a third of their maximum dimension.

De préférence, les résidus comprennent au moins 50% en poids desdits petits morceaux de "moelle".Preferably, the residues comprise at least 50% by weight of said small pieces of "marrow".

Cette proportion peut approcher les 100%. On a constaté que les propriétés du matériau peuvent encore être améliorées si on prévoit que les résidus comprennent en outre jusqu'à 50% en poids de fibres courtes de noix de coco de longueur de 2 à 5 mm et de diamètre 0,1 à 0,4 mm. Les fibres courtes de noix de coco peuvent être soit grossièrement orientées, soit orientées au hasard, selon l'usage prévu.This proportion can approach 100%. It has been found that the properties of the material can be further improved if it is expected that the residues further comprise up to 50% by weight of short coconut fibers 2 to 5 mm in length and 0.1 to 0 in diameter , 4 mm. Short coconut fibers can be either roughly oriented or randomly oriented, depending on the intended use.

Si l'on désire obtenir des propriétés encore renforcées dans une direction préférées, on peut prévoir que les résidus comprennent en outre jusqu'à 50% de fibres longues de noix de coco de longueur 50 à 150 mm et de diamètre 0,1 à 0,4 mm.If it is desired to obtain properties which are further strengthened in a preferred direction, it can be provided that the residues further comprise up to 50% of long coconut fibers of length 50 to 150 mm and of diameter 0.1 to 0 , 4 mm.

La mise en oeuvre des fibres longues peut être analogue à celle qui est décrite dans EP-A-0404679 mentionné plus haut, le mélange de petits morceaux de moelle, et éventuellement de fibres courtes avec le liant se comportant alors comme un liant contenant une charge, ainsi qu'il est bien connu.The use of long fibers can be analogous to that described in EP-A-0404679 mentioned above, the mixture of small pieces of marrow, and possibly short fibers with the binder then behaving like a binder containing a filler , as is well known.

Il a en outre été découvert que la résistance à la compression du matériau selon l'invention peut être encore augmentée si on prévoit que les résidus comprennent jusqu'à 30% en poids de coque de noix de coco broyée à une dimension moyenne de 0,2 à 2 mm.It has also been discovered that the compressive strength of the material according to the invention can be further increased if it is expected that the residues comprise up to 30% by weight of coconut shell crushed to an average dimension of 0, 2 to 2 mm.

La coque de noix de coco broyée est un matériau rigide, donc de propriétés nettement différentes de la souplesse de la moelle et de la flexibilité des fibres, le dosage des différents composants permet donc d'adapter dans une large gamme les propriétés du matériau obtenu aux exigences de l'utilisateur.The crushed coconut shell is a rigid material, therefore with properties clearly different from the flexibility of the cord and the flexibility of the fibers, the dosage of the various components therefore makes it possible to adapt in a wide range the properties of the material obtained to the requirements of the user.

L'invention fournit également un procédé d'obtention d'un matériau de la composition qu'on vient de décrire, ce matériau comprenant les étapes suivantes :The invention also provides a process for obtaining a material of the composition that has just been described, this material comprising the following steps:

1) séparer par tamisage les fibres courtes et lesdits petits morceaux de "moelle",1) separating the short fibers and said small pieces of "marrow" by sieving,

3) mélanger les petits morceaux de "moelle" et les autres composants solides éventuels tels que fibres courtes, fibres longues et coque broyée, dans les proportions choisies, avec un prépolymère de liant, éventuellement additionné d'un durcisseur,3) mix the small pieces of "marrow" and the other possible solid components such as short fibers, long fibers and crushed shell, in the chosen proportions, with a binder prepolymer, optionally added with a hardener,

4) mouler le mélange sous pression à chaud dans des conditions aboutissant à la polymérisation du liant. Suivant une variante intéressante, l'étape 4) de ce procédé est remplacée par une étape 4' ) consistant à mettre le mélange en forme par extrusion à chaud, puis laisser polymériser le liant.4) molding the mixture under hot pressure under conditions leading to the polymerization of the binder. According to an interesting variant, step 4) of this process is replaced by a step 4 ') consisting of shaping the mixture by hot extrusion, then allowing the binder to polymerize.

Le premier procédé permet d'obtenir, notamment, des blocs ou des plaques. Le deuxième procédé permet d'obtenir des profilés, et en particulier des tubes, aux caractéristiques particulièrement intéressantes.The first method makes it possible to obtain, in particular, blocks or plates. The second method makes it possible to obtain profiles, and in particular tubes, with particularly advantageous characteristics.

L'invention va maintenant être décrite de façon plus détaillée à l'aide d'un exemple pratique. On est parti d'une matière première ayant la composition suivante :The invention will now be described in more detail with the aid of a practical example. We started with a raw material having the following composition:

- 60% de morceaux de "moelle" de noix de coco,- 60% pieces of coconut "marrow",

- 25% de fibres courtes de noix de coco,- 25% short coconut fiber,

- 15% de coques de noix de coco broyées à une dimension de l'ordre de 0,1 à 0, -™.- 15% of coconut shells crushed to a size of the order of 0.1 to 0, - ™.

On a ajouté à ces matières premières un mélange de la résine "DESMODUR VL" et la résine du durcissement "DESMOFEN 550U" , toutes deux de la société BAYER, utilisées sans solvant en proportions égales. La proportion de ces résines était de 5% en poids des matières premières définies plus haut. Après mélange, on a obtenu un produit ayant la consistance d'une farine. On l'a placé dans une extrudeuse, développant une pression de 150 bars à température de 100*C. On a obtenu un tube de diamètre extérieur 35 mm, d'épaisseur de paroi 3 mm, satisfaisant pour, par exemple, une adduction d'eau, et capable de remplacer les tubes usuels en polychlorure de vinyle. Was added to these raw materials a mixture of the resin "DESMODUR VL" and the resin curing "MAJESTY FOE 550U", both from the company Bayer uti l ized without solvent in equal proportions. The proportion of these resins was 5% by weight of the raw materials defined above. After mixing, a product having the consistency of flour was obtained. We placed it in an extruder, developing a pressure of 150 bars at a temperature of 100 ° C. A tube with an outside diameter of 35 mm was obtained, with a wall thickness of 3 mm, satisfactory for, for example, a water supply, and capable of replacing the usual polyvinyl chloride tubes.

Claims

REVENDICATIONS 1. Matériau obtenu à partir de résidus de noix e coco, imprégnés et liés entre eux par un liant polymérisé caractérisé en ce que lesdits résidus comprennent au moins 10% en poids de petits morceaux de "moelle" ou matière végétale qui se forme entre les fibres enveloppant la noix de coco, ces morceaux ayant une dimension maximale de 0,2 à 2 mm et une dimension minimale supérieure au tiers de leur dimension maximale.CLAIMS 1. Material obtained from coconut residues, impregnated and bonded together by a polymerized binder, characterized in that said residues comprise at least 10% by weight of small pieces of "marrow" or plant material which forms between the fibers enveloping the coconut, these pieces having a maximum dimension of 0.2 to 2 mm and a minimum dimension greater than one third of their maximum dimension. 2. Matériau selon la revendication 1, caractérisé en ce que les résidus comprennent au moins 50% en poids desdits petits morceaux de "moelle".2. Material according to claim 1, characterized in that the residues comprise at least 50% by weight of said small pieces of "marrow". 3. Matériau selon 1*une des revendications 1 ou 2, caractérisé en ce que les résidus comprennent en outre jusqu'à 50% en poids de fibres courtes de noix de coco de longueur de 2 à 5 mm et de diamètre 0,1 à 0,4 mm. . Matériau selon 1•une des revendications 1 à 3, caractérisé en ce que les résidus comprennent en outre jusqu'à 50% de fibres longues de noix de coco de longueur 50 à 150 mm et de diamètre 0,1 à 0,3. Material according to 1 * one of claims 1 or 2, characterized in that the residues further comprise up to 50% by weight of short coconut fibers of length 2 to 5 mm and of diameter 0.1 to 0.4 mm. . Material according to 1 • one of claims 1 to 3, characterized in that the residues further comprise up to 50% of long coconut fibers of length 50 to 150 mm and of diameter 0.1 to 0, 4 mm.4 mm. 5. Matériau selon l'une des revendications 1 à 4, caractérisé en ce que les résidus comprennent jusqu'à 30% en poids de coque de noix de coco broyée à une dimension moyenne de 0, à 2 mm.5. Material according to one of claims 1 to 4, characterized in that the residues comprise up to 30% by weight of coconut shell crushed to an average dimension of 0.2 to 2 mm. 6. Procédé d'obtention d'un matériau selon l'une des revendications 1 à 5, caractérisé en ce qu'il comprend les étapes suivantes :6. Method for obtaining a material according to one of claims 1 to 5, characterized in that it comprises the following steps: 1 ) séparer par tamisage les fibres courtes et lesdits petits morceaux de "moelle",1) separating the short fibers and said small pieces of "marrow" by sieving, 2) mélanger les petits morceaux de "moelle" et les autres composants solides éventuels tels que fibres courtes, fibres longues et coque broyée, dans les proportions choisies, avec un prépolymère de liant, éventuellement additionné d'un durcisseur,2) mix the small pieces of "marrow" and the other possible solid components such as short fibers, long fibers and crushed shell, in the chosen proportions, with a binder prepolymer, optionally added with a hardener, 3) mouler le mélange sous pression à chaud dans des conditions aboutissant à la polymérisation du liant. 3) molding the mixture under hot pressure under conditions leading to the polymerization of the binder. 7. Procédé d'obtention d'un matériau selon l'une des revendications 1 à 5, caractérisé en ce qu'il comprend les étapes suivantes :7. Process for obtaining a material according to one of claims 1 to 5, characterized in that it comprises the following steps are: 1) séparer par tamisage les fibres courtes et lesdits petits morceaux de "moelle",1) separating the short fibers and said small pieces of "marrow" by sieving, 2) mélanger les petits morceaux de "moelle" et les autres composants solides éventuels tels que fibres courtes, fibres longues e coque broyée avec un prépolymère de liant, éventuellement additionné d'un durcisseur,2) mix the small pieces of "marrow" and the other possible solid components such as short fibers, long fibers and ground shell with a binder prepolymer, optionally added with a hardener, 3' ) mettre le mélange en forme par extrusion à chaud, puis laisser polymériser le liant. 3 ') put the mixture into shape by hot extrusion, then allow the binder to polymerize.
PCT/FR1994/001262 1993-04-21 1994-10-28 Material made from coconut waste Ceased WO1996013365A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9304706A FR2704175A1 (en) 1993-04-21 1993-04-21 Material obtained from coconut residue.
PCT/FR1994/001262 WO1996013365A1 (en) 1993-04-21 1994-10-28 Material made from coconut waste

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304706A FR2704175A1 (en) 1993-04-21 1993-04-21 Material obtained from coconut residue.
PCT/FR1994/001262 WO1996013365A1 (en) 1993-04-21 1994-10-28 Material made from coconut waste

Publications (1)

Publication Number Publication Date
WO1996013365A1 true WO1996013365A1 (en) 1996-05-09

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Family Applications (1)

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PCT/FR1994/001262 Ceased WO1996013365A1 (en) 1993-04-21 1994-10-28 Material made from coconut waste

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1190825A3 (en) * 2000-07-29 2004-01-21 Ernst Nickel Thin-walled three-dimensional molded semi-finished or finished article
DE102006061991A1 (en) * 2006-12-21 2008-07-03 E&W Greenland Gmbh Material for the production of a shaped body and shaped body

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1565996A (en) * 1967-05-22 1969-05-02
US4627951A (en) * 1983-03-30 1986-12-09 K. C. Shen Technology International Ltd. Process for manufacturing composite products from lignocellulosic materials
EP0404679A1 (en) * 1989-06-22 1990-12-27 Ayikoué Assiagnon Atayi Building material made from residual plants and method for its production
FR2704175A1 (en) * 1993-04-21 1994-10-28 Atayi Ayikoue Assiagnon Material obtained from coconut residue.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1565996A (en) * 1967-05-22 1969-05-02
US4627951A (en) * 1983-03-30 1986-12-09 K. C. Shen Technology International Ltd. Process for manufacturing composite products from lignocellulosic materials
EP0404679A1 (en) * 1989-06-22 1990-12-27 Ayikoué Assiagnon Atayi Building material made from residual plants and method for its production
FR2704175A1 (en) * 1993-04-21 1994-10-28 Atayi Ayikoue Assiagnon Material obtained from coconut residue.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1190825A3 (en) * 2000-07-29 2004-01-21 Ernst Nickel Thin-walled three-dimensional molded semi-finished or finished article
DE102006061991A1 (en) * 2006-12-21 2008-07-03 E&W Greenland Gmbh Material for the production of a shaped body and shaped body
WO2008074310A3 (en) * 2006-12-21 2008-09-25 E & W Greenland Gmbh Material for the production of a molded body, and a molded body
DE102006061991B4 (en) * 2006-12-21 2010-06-24 Inotec Glienke & Glienke Gbr (Vertretungsberechtigte Gesellschafter: Peter O. Glienke Material for producing a shaped body

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