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WO1998030081A1 - Procede pour fabriquer un produit comprenant des materiaux bruts sensiblement biodegradables - Google Patents

Procede pour fabriquer un produit comprenant des materiaux bruts sensiblement biodegradables Download PDF

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Publication number
WO1998030081A1
WO1998030081A1 PCT/NL1998/000009 NL9800009W WO9830081A1 WO 1998030081 A1 WO1998030081 A1 WO 1998030081A1 NL 9800009 W NL9800009 W NL 9800009W WO 9830081 A1 WO9830081 A1 WO 9830081A1
Authority
WO
WIPO (PCT)
Prior art keywords
product
starting material
scraps
binder
base mixture
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/NL1998/000009
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English (en)
Inventor
Heleen LAMORÉE
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
Application filed by Individual filed Critical Individual
Priority to AU54992/98A priority Critical patent/AU5499298A/en
Publication of WO1998030081A1 publication Critical patent/WO1998030081A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • A01G9/029—Receptacles for seedlings

Definitions

  • the invention relates to a method for fabricating a product comprising substantially biodegradable raw materials, a starting material being prepared from a base mixture containing substantially biodegradable, natural materials or scraps and binder and said starting material being subjected, in a die, to a pressure and heat treatment .
  • a method for fabricating a product comprising substantially biodegradable raw materials, a starting material being prepared from a base mixture containing substantially biodegradable, natural materials or scraps and binder and said starting material being subjected, in a die, to a pressure and heat treatment .
  • Such a method is known from the European Patent Application 613.905 by means of which a biodegradable product, in particular a biodegradable plant pot on the basis of natural vegetable or animal fibres is obtained which, based on the dry solids content, contains 50- 90 wt% of fibres and 1-50 wt# of a pretreated potato pulp.
  • the potato pulp has to be pretreated, either with enzymes or mechanically, the potato pulp preferably being treated with enzymes and subjected, before and/or after said enzymatic treatment, to a mechanical pretreatment in the course of which potato pulp particles having a size of less than 350 ⁇ m are obtained. Said pretreatment is required in order to impart to the potato pulp particles binding properties with respect to the vegetable or animal fibres .
  • the potato pulp which results from the production of starch and which contains about 75 ⁇ 95 wt# of water first of all has to be diluted to a solids content of less than 1 vt% and preferably less than 10 wt%.
  • the potato pulp is treated with enzymes and/or is ground into small particles and is applied to the fibres , for example by impregnation or spraying.
  • the excess water is removed, preferably mechanically, from the fibres impregnated or sprayed with potato pulp, after which a bonded fibre web is made under the influence of pressure and elevated temperature, and the product is moulded from said web.
  • the product can also be fabricated by the pretreated potato pulp being processed, together with the vegetable or animal fibres, to produce a slurry, which slurry is then moulded with pressure and heat to give the product.
  • the method according to the European Patent Application 613.905 has various drawbacks, however. For example, at least five to six steps are required (1. dilution and 2.
  • the wood is used in the form of wood chips or sawdust and the maize in the form of cornflour or grits.
  • the binder used is natural resin.
  • the method for preparing the "Fasal” material comprises mixing the wood constituents and maize constituents in the dry state, after which the other constituents, some of which are in the liquid state, are added to this mixture to form a dispersible mixture.
  • This mixture is then subjected to injection-moulding, a granular material being obtained in the process which consists of particles having a length of 3"5 ⁇ TM and which has a moisture content of about 18%.
  • this granular material Before this granular material can be used for the fabrication of a product, it first needs to be dried to a moisture content of about 10%.
  • the method for fabricating products from the "Fasal” material therefore has the drawback that it is first necessary to produce a granular material and that this granular material then has to be dried to a suitable moisture content.
  • a further drawback of this material is that if it used to fabricate a product, the thickness of the wall of the product has to be at least 3 mm. The mechanical properties of the "Fasal" material are therefore inadequate, in particular for fabricating products having a small wall thickness (for example 1-3 mm) .
  • biodegradable pots for seedlings can be fabricated by injection-moulding a mixture of coconut powder and a biodegradable plastic such as an aliphatic polyester which comprises a lactic acid resin and/or a carboxylic acid resin, the mixture containing 30-90 wt# of the resin and 70-10 wt% of coconut powder.
  • a biodegradable plastic such as an aliphatic polyester which comprises a lactic acid resin and/or a carboxylic acid resin, the mixture containing 30-90 wt# of the resin and 70-10 wt% of coconut powder.
  • the German Patent Application 19,500,653 describes a container for plants which is formed by injection-moulding a mixture consisting of animal and/or vegetable fibres and fillers, pigments or other substances, together with a solution of alkali metal silicates in water. After the container has been moulded from this mixture, it is exposed to an acidic gas such as nitric acid or sulphuric acid, the alkali metal silicates decomposing to amorphous silicic acid and the container curing in the process. The container then needs to be conditioned by, for example, being dried.
  • an acidic gas such as nitric acid or sulphuric acid
  • the method according to the German Patent Application 19,500,653 has the drawbacks that many steps are required for fabrication of the container (preparing mixture of the various constituents, moulding the product and treating it with an acidic gas, followed by conditioning) and that gaseous acids are required which are harmful to the environment and hazardous .
  • the object of the invention is to provide a solution to the abovementioned problems.
  • the invention therefore relates to a method as mentioned in the preamble, in which: a) a starting material is prepared which contains at least 8 wt#, but no more than 18 of water, and b) the starting material obtained in step a) is moulded in the die at a temperature of at most 130°C to give the product. It is therefore possible for the starting material not to contain any binder.
  • the starting material is prepared from from 70 to 99 w t% of vegetable materials or scraps and from 1 to 30 wt% of base mixture containing the binder.
  • the invention provides a method for a product which primarily or solely comprises biodegradable raw materials , the product being obtainable in a simple manner and in a short time. Moreover, no chemical substances are required which are harmful to the environment and hazardous, and the product degrades completely or almost completely over a specific time.
  • the starting material is prepared from at least from 75 to 95 wt% of vegetable materials or scraps and from 5 to 2 wt of base mixture containing the binder, in particular from from 80 to 90 wt# of vegetable materials or scraps and from 10 to 20 vt% of base mixture containing the binder, and in step b) the product is preferably moulded at a temperature of at most 120°C.
  • the water which is present in the starting material derives from the water which was originally present in the original materials or scraps. It is therefore generally unnecessary and often even undesirable to add additional water.
  • the starting material must not contain too little water, since that would make fabrication considerably more difficult, resulting in an unattractive product. Also, for the same reason, the temperature at which the product is moulded should not be too high.
  • the starting material therefore preferably contains at least 10 wt% of water and in particular at least 12 wt% of water.
  • the temperature at which the product is moulded is more preferably at most 110°C and in particular at most 100°C. If the product is moulded at a lower temperature, for example a temperature of less than 100°C, the starting material is preferably admixed with one or more viscosity-lowering preparations.
  • the starting material If the water content is too high, discoloration of the starting material may occur, which may lead to a product of unattractive appearance. It was also found that processing of a starting material having a high water content to obtain the product generally requires a lower temperature and low pressure. Since the temperature is not higher than 130°C, preferably at most 120°C, more preferably at most 110°C and in particular at most 100°C, the starting material therefore preferably contains not more than 16 wt# of water and in particular not more than 14 wt% of water.
  • the starting material is generally prepared from vegetable materials or scraps and a base mixture containing binder.
  • the binder is preferably a polysaccharide.
  • the base mixture then preferably contains a release agent and a plasticizer.
  • the starting material should contain as large an amount of vegetable materials or scraps as possible.
  • the starting material can further contain natural colorants or natural pigments such as, for example, those used in foods. Examples of suitable colorants are chlorophyll, betanin, caramel, various carotenes and annatto.
  • the base mixture containing binder preferably contains a release agent and a plasticizer, the binder ensuring that a product having sufficient strength is obtained, the release agent ensuring that the product, once it has been moulded, can be removed from the die without difficulty, and the plasticizer being required for effective action of the binder.
  • the base mixture contains from 1 to wt of the release agent, preferably from 1.5 to 4 v/t% and in particular from 2 to 3 wt#, and from 5 to 30 wt% of the plasticizer, preferably from 8 to 25 wt# and in particular from 10 to 20 wt%.
  • binders are polysaccharides such as, for example, starch- type, pectin-type, cellulose-type substances and customary plastics.
  • suitable release agents are phospholipids such as lecithins.
  • suitable plasticizers are polar solvents such as water, aliphatic alcohols, diols or triols such as ethanol, glycol, 1,3- dihydroxypropane , glycerol and higher aliphatic alcohols such as pentaerythritol, di- and triethylene glycols and di- and tripropylene glycols and alkyl ether derivatives, for example methyl ether derivatives, and acetate derivatives thereof.
  • the binder is preferably a starch and in particular potato starch, a cold-solvent-soluble starch, for example "Flocgel", or a modified starch.
  • the release agent is preferably a lecithin and in particular lecithin obtained from soya.
  • the polar solvent is preferably an aliphatic triol and in particular glycerol, natural glycerol being used in preference to synthetic glycerol.
  • the base mixture may also contain a preparation for increasing the density of the base mixture, such as lignosulphate.
  • the starting material prepared from vegetable materials or scraps generally comprises vegetable materials or scraps such as scraps of wood, vegetable and garden waste, dried herbs, dried vegetables or scraps thereof, dried flowers or remains thereof, dried fruit or remains thereof, scraps of paper, cotton fibres, hay, straw, dried leaves, flax, hemp, elephant grass or mixtures thereof.
  • suitable dried herbs are chervil and stalks thereof, parsley and turmeric.
  • suitable vegetables or scraps thereof are carrots, beet and cabbage.
  • suitable flowers or remains thereof are tulips, roses, hibiscus, cornflowers, marigolds and lavender.
  • Suitable examples of dried leaves are those from birch and stinging-nettle.
  • the product can be fabricated from a starting material entirely consisting of vegetable materials or scraps, if these materials or scraps are derived from carrots, green beans or peas.
  • the starting material preferably comprises scraps of wood, in particular chips and sawdust, and other biodegradable vegetable materials or scraps such as the abovementioned, preferably dried vegetable and garden waste, dried herbs, dried vegetables or scraps thereof, dried flowers or remains thereof, dried fruit or remains thereof, paper scraps, cotton fibres, hay, straw, dried leaves or mixtures thereof.
  • the starting material generally contains from 1 to 99 vt% , preferably from 5 to 0 vt% and in particular from 10 to 95 wt# of scraps of wood.
  • the starting material is generally in fibrous and/or particulate form and is obtained by mixing of the desired constituents.
  • the fibres or particles generally have a size of from 0.01 to 10 mm, preferably from 0.1 to mm and in particular from 1 to 3 mm.
  • the starting material can be processed directly to give the product according to the invention. It is possible, however, for the starting material first to be pelleted or extruded, granules having a size of from about 1 to 20 mm, preferably having a size of from 1 to 5 mm being obtained in the process.
  • the product according to the invention is then moulded by means of compression- or injection-moulding, the starting material being processed directly as such, i.e. in its fibrous and particulate form, or the granules comprising the starting material being processed.
  • the compression- or injection-moulding involves the use of a die whose shape is complementary to that of the desired product.
  • products can be moulded which have sufficient strength, and generally have a wall thickness of at least 1 mm.
  • products can be fabricated having a wall thickness of 1-3 mm.
  • the upper limit of the wall thickness is in fact not limited and can, for example, be 1-5 cm. It will be obvious to those skilled in the art that the method according to the present invention can also be used to fabricate solid products.
  • the starting material can contain much more than 30 wt% of the base mixture containing binder, for example 70 wt%.
  • the product can therefore be fabricated from a starting material, said starting material being compression-moulded at a temperature of at most 130 ° C.
  • said product is preferably fabricated from a starting material which contains at least from 0 to 100 wt%, more preferably from 60 to 99 wt% and in particular from 75 to 95 wt# of vegetable materials or scraps and from 0 to 50 wt , more preferably from 1 to 40 vt% and in particular from 5 to 25 vt% of base mixture containing a binder.
  • the starting material according to the invention can be used to mould products which have excellent biodegradability.
  • the starting material according to the invention is suitable, in particular, for moulding plant pots and trays, coffins, toys, disposable goods such as hard packaging, gift articles, office articles, body-care and cosmetic products, motor car articles, decorative products, domestic products and buffer materials.
  • the invention therefore also relates to a product obtainable in accordance with the method as described.
  • the product according to the invention may, if required, be made water-repellent by being coated with, for example, a water-insoluble protein or with a biodegradable, preferably natural wax such as beeswax.
  • Making the product water-repellent can be effected by the base mixture being admixed with a biodegradable polymer such as poly(lactic acid), polycaprolactone, butene-succinate-adipate copolymers and starch-polyester blends.
  • a biodegradable polymer such as poly(lactic acid), polycaprolactone, butene-succinate-adipate copolymers and starch-polyester blends.
  • a base mixture was prepared by mixing of potato starch, lecithin obtained from soya, and natural glycerol. The properties of the lecithin and the glycerol are shown in the tables below.
  • the base mixture contained 2 wt% of lecithin, 14 wt% of glycerol and 84 wt% of potato starch.
  • Example 1 The starting material of Example 1 was injection-moulded with the aid of an injection-moulding machine of type DEMAG 25 (the screw diameter was 18 mm) to produce rods, with the proviso that the starting material had been prepared from a base mixture containing 30% of potato starch and that the starting material, prior to injection-moulding, was pelleted to give granules having a diameter of about 5 mm and a length of about 12 mm. The water content of the starting material was 12.5%.
  • the injection-moulding conditions were as follows:
  • a starting material was prepared from 70 wt% of sawdust and 30 wt% of a base mixture which contained 84 wt% of starch, 2 wt% of lecithin and 14 wt% of glycerol.
  • the starting material was made into pellets and these were then compression-moulded, with the aid of a die, to give a round bowl-shaped product having a diameter of 41 mm, a height of 28 mm and a wall thickness of 1.5 mm.
  • the pressing time was 3 sec, and compression-moulding was carried out with a force of 80 metric tonnes and a die temperature of 70 ° C.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Selon un procédé qui permet de fabriquer un produit comprenant des matériaux bruts sensiblement biodégradables, on prépare un matériau de départ à partir d'un mélange de base contenant des matériaux naturels ou des matériaux de récupération biodégradables et si possible un liant, puis on soumet ledit matériau de départ, dans une filière, à un traitement par la pression et la chaleur. Le procédé est caractérisé par les faits suivants: a) on prépare un matériau de départ contenant au moins 8 % en poids et au maximum 18 % en poids d'eau, et b) on moule le matériau de départ obtenu à l'étape a) dans la filière, à une température de 130 °C maximum, de façon à obtenir le produit.
PCT/NL1998/000009 1997-01-07 1998-01-07 Procede pour fabriquer un produit comprenant des materiaux bruts sensiblement biodegradables Ceased WO1998030081A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54992/98A AU5499298A (en) 1997-01-07 1998-01-07 Method for fabricating a product comprising substantially biodegradable raw materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1004947A NL1004947C2 (nl) 1997-01-07 1997-01-07 Werkwijze voor het vervaardigen van een uit in hoofdzaak biologisch afbreekbare grondstoffen bestaand voortbrengsel.
NL1004947 1997-01-07

Publications (1)

Publication Number Publication Date
WO1998030081A1 true WO1998030081A1 (fr) 1998-07-16

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ID=19764176

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Application Number Title Priority Date Filing Date
PCT/NL1998/000009 Ceased WO1998030081A1 (fr) 1997-01-07 1998-01-07 Procede pour fabriquer un produit comprenant des materiaux bruts sensiblement biodegradables

Country Status (3)

Country Link
AU (1) AU5499298A (fr)
NL (1) NL1004947C2 (fr)
WO (1) WO1998030081A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099368A3 (fr) * 1999-11-10 2002-02-06 Yasuo Iwamoto Conteneur à plante et procédé de fabrication
EP1481778A4 (fr) * 2002-03-05 2005-05-11 Dainippon Pharmaceutical Co Procede de production d'objets moules en fibres biodegradables
FR2941703A1 (fr) * 2009-02-02 2010-08-06 Eurotab Produit compacte a base de bois et de cellulose.
ITBO20110114A1 (it) * 2011-03-09 2012-09-10 Giuseppe Mandrioli Contenitore particolarmente per piante e simili.
CN104308946A (zh) * 2014-08-29 2015-01-28 惠州东慧新材料制品有限公司 可快速降解的植物纤维建筑装饰材料及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559450A2 (fr) * 1992-03-04 1993-09-08 Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo Liant et ses applications
EP0613905A1 (fr) * 1993-03-02 1994-09-07 Aloys Prof. Dr. Hüttermann Article moulé biodégradable, en particulier pot de fleurs biodégradable
WO1995004111A1 (fr) * 1993-07-29 1995-02-09 Markus Rettenbacher Corps moule constitue par ou renfermant un materiau ne nuisant pas a l'environnement, son procede de fabrication et son application
EP0716804A1 (fr) * 1994-12-16 1996-06-19 Ichiro Sugimoto Pot de semis se décomposant en terre
WO1996018675A1 (fr) * 1994-12-02 1996-06-20 Co-Pak, Inc. Materiau absorbant a base de residus de l'agriculture et technique de fabrication
DE19500653A1 (de) * 1995-01-12 1996-07-18 Christian Dipl Che Nuernberger Verfahren und Vorrichtung zur Herstellung eines durch Verrottung oder Verdauung abbaubaren Behälters sowie dergleichen Behälter
EP0753541A1 (fr) * 1995-07-11 1997-01-15 Bct Ag Masse à mouler, à base de fibres végétales, procédé de production d'un article moulé, dispositif de pressage de la masse à mouler et pièce moulée

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559450A2 (fr) * 1992-03-04 1993-09-08 Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo Liant et ses applications
EP0613905A1 (fr) * 1993-03-02 1994-09-07 Aloys Prof. Dr. Hüttermann Article moulé biodégradable, en particulier pot de fleurs biodégradable
WO1995004111A1 (fr) * 1993-07-29 1995-02-09 Markus Rettenbacher Corps moule constitue par ou renfermant un materiau ne nuisant pas a l'environnement, son procede de fabrication et son application
WO1996018675A1 (fr) * 1994-12-02 1996-06-20 Co-Pak, Inc. Materiau absorbant a base de residus de l'agriculture et technique de fabrication
EP0716804A1 (fr) * 1994-12-16 1996-06-19 Ichiro Sugimoto Pot de semis se décomposant en terre
DE19500653A1 (de) * 1995-01-12 1996-07-18 Christian Dipl Che Nuernberger Verfahren und Vorrichtung zur Herstellung eines durch Verrottung oder Verdauung abbaubaren Behälters sowie dergleichen Behälter
EP0753541A1 (fr) * 1995-07-11 1997-01-15 Bct Ag Masse à mouler, à base de fibres végétales, procédé de production d'un article moulé, dispositif de pressage de la masse à mouler et pièce moulée

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099368A3 (fr) * 1999-11-10 2002-02-06 Yasuo Iwamoto Conteneur à plante et procédé de fabrication
EP1481778A4 (fr) * 2002-03-05 2005-05-11 Dainippon Pharmaceutical Co Procede de production d'objets moules en fibres biodegradables
FR2941703A1 (fr) * 2009-02-02 2010-08-06 Eurotab Produit compacte a base de bois et de cellulose.
ITBO20110114A1 (it) * 2011-03-09 2012-09-10 Giuseppe Mandrioli Contenitore particolarmente per piante e simili.
CN104308946A (zh) * 2014-08-29 2015-01-28 惠州东慧新材料制品有限公司 可快速降解的植物纤维建筑装饰材料及其制备方法

Also Published As

Publication number Publication date
NL1004947C2 (nl) 1998-07-27
AU5499298A (en) 1998-08-03
NL1004947A1 (nl) 1998-07-13

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