EP0304764B1 - Méthode de préparation de matériau cellulosique défibré, en particulier des fibres de bois, pour la fabrication des panneaux de fibres - Google Patents

Méthode de préparation de matériau cellulosique défibré, en particulier des fibres de bois, pour la fabrication des panneaux de fibres Download PDF

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Publication number
EP0304764B1
EP0304764B1 EP88113246A EP88113246A EP0304764B1 EP 0304764 B1 EP0304764 B1 EP 0304764B1 EP 88113246 A EP88113246 A EP 88113246A EP 88113246 A EP88113246 A EP 88113246A EP 0304764 B1 EP0304764 B1 EP 0304764B1
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EP
European Patent Office
Prior art keywords
steam
resin
fiber particles
fiber
particles
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.)
Revoked
Application number
EP88113246A
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German (de)
English (en)
Other versions
EP0304764A2 (fr
EP0304764A3 (en
Inventor
Henricus Johannes Lanters
Jacobus Johannus Martinus Bremmers
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.)
Hoechst AG
Original Assignee
Hoechst AG
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Filing date
Publication date
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Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT88113246T priority Critical patent/ATE86166T1/de
Publication of EP0304764A2 publication Critical patent/EP0304764A2/fr
Publication of EP0304764A3 publication Critical patent/EP0304764A3/de
Application granted granted Critical
Publication of EP0304764B1 publication Critical patent/EP0304764B1/fr
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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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • 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
    • B27N1/00—Pretreatment of moulding material

Definitions

  • the invention relates to a process for the production of shredded cellulose material, in particular wood fibers, up to a fiber length of 20 mm, which is provided with a high proportion of thermosetting resin.
  • the glued wood fibers are suitable for the production of decorative molded parts, whereby they are first formed into a fiber mat and then pressed at high temperature.
  • the method according to the invention is based on the known methods in which wood chips are first softened with steam and then, e.g. between two grinding disks, into wood fibers with a length of up to 20 mm. An aqueous alkaline solution of a thermosetting resin is then applied to the moist wood fibers and the glued wood fibers e.g. dried with hot air to a residual moisture content below 15% by weight (EP-B-0 081 147).
  • this known method is carried out, however, there is a risk that the resinous particles stick to the wall of the drying tube during drying and, in extreme cases, clog the drying tube, whereby self-ignition easily occurs.
  • the invention further relates to a decorative plate comprising a core layer and a decorative layer on one or both sides, in which the core layer consists of the fiber particles produced according to claim 1.
  • the plate is a flat body, the surface shape and surface structure of which is adapted to the application and which e.g. can also have a curved shape.
  • the plate is preferably a body with a substantially flat surface. Their thickness is in particular in the range from 0.5 to 30 mm. Plates of this type are described in particular in EP-B-0 081 147.
  • the plate according to the invention expediently has a scratch-resistant surface as described in EP-A-0 166 153 and EP-A-0 216 269.
  • Fibrous cellulose material is to be understood in particular as fibrous wood particles.
  • You will be out Produced wood types that allow defibering for example from softwood, such as spruce or pine, or hardwood, such as chestnut or beech wood.
  • cellulose fibers and industrial wood, paper and cellulose waste for example also wood flour or wood pulp, can be used; Waste from woodworking workshops is also suitable. It is also possible to replace part of the wood fibers, cellulose fibers or wood waste, preferably up to 20% by weight, with plastic waste, for example in the form of fibers or granules.
  • the wood is washed to remove traces of metal, stone or sand, then crushed into wood chips in a mill.
  • the wood chips are softened in a digestor (steam boiler) with water vapor under steam pressure of 1 to 10 bar in a few minutes and then, e.g. between two grinding disks in a refiner, chopped into wood fibers.
  • a digestor steam boiler
  • the wood fibers thus digested have a length of 0.3 to 20 mm, an average length of 0.5 to 3 mm and an average diameter of 0.025 to 0.05 mm.
  • the diameter range is between 0.01 and 1 mm, depending on the raw wood used and the defibration conditions.
  • the length and diameter of the cellulose fibers used are in the same dimensional range.
  • the fiber particles emerging from the fiberizing machine are blown in a hot steam stream in a blowing system transported under increased pressure, preferably at 2 to 10 bar, in particular 4 to 6 bar, in turbulent flow.
  • thermosetting resin is added in an aqueous, preferably alkaline solution, which is sprayed into the blowing system. Due to the turbulent flow, caused by a correspondingly small dimensioning of the blow pipe ("blow line") and an applied pressure difference over the length of the blow pipe, an optimal mixture between resin and fiber particles takes place, even with very large amounts of resin, which are 200 to 1,000 g, in particular 300 to 600 g, can be 1,000 g of dry fibers.
  • the thermosetting resin is preferably a phenol-formaldehyde resin, as is customary for the production of decorative building boards (EP-B-0 081 147).
  • the mixture of water vapor and resinous fiber particles is led from the blowing system to a unit, where the resinous fiber particles are removed from the water vapor.
  • the water vapor is preferably completely separated off.
  • the fiber particles then still have a water content of 15 to 35% by weight, in particular 18 to 25% by weight.
  • This stage is advantageously carried out in a cyclone separator at atmospheric pressure, in particular without energy supply, but in principle other devices are also suitable with which systems made of solid particles, such as dust, and gases can be separated from one another.
  • Such devices are, for example, devices that work on the principle of gravity or centrifugal force and / or are constructed from filters or mechanical separators (cf. Perry's Chemical Engineers' Handbook, 6th ed.
  • the fiber particles are expediently blown through a drying tube heated with warm air, and are finely distributed by the air flow.
  • the warm air preferably has a temperature of 60 to 110 ° C.
  • the dried fibers leave the drying stage, for example, via a further cyclone separator or a similar device and are passed on for further processing, in particular for the production of decorative building boards, as described, for example, in EP-B-0 081 147.
  • the method surprisingly shows a combination of advantages. This largely prevents the presence of water vapor in the dryer, which means that the energy requirement is relatively low. The risk of fire is also significantly reduced. There is no danger in the blowing system or in the dryer that their function will be disturbed by adhering material.
  • the method does not require a great deal of equipment, and additional units for mixing and / or conveying the fiber particles are not required.
  • the fibers obtained after the drying stage are not agglomerated, so that they can be easily formed into compressible fiber mats.
  • the invention is illustrated by the following example and the figure.
  • the figure schematically shows the process flow.
  • Wood chips with approximately the same weight of water are continuously fed into a container 1 and treated in the boiler 2 with hot steam. After a dwell time of a few minutes, the softened wood chips are transported on to a refiner 3, where they are shredded into wood fibers between two grinding disks.
  • the wood fibers are passed on with hot water steam in a blowing system 4, into which thermosetting phenol-formaldehyde resin in aqueous alkaline solution is sprayed via the resin injector 5.
  • the blowing system 4 is cooled from the outside with water (cooling jacket 6).
  • the mixture of water vapor and resinous wood fibers obtained then passes into a cyclone separator 7 under atmospheric pressure.
  • the resin-coated or impregnated wood fibers are passed through a cell lock 9 into a drying tube 10 for the remaining drying, which they leave with a residual moisture content of 7% by weight.
  • the wood fibers are conveyed further into a cyclone separator 11 by the dryer air and transported via a cell lock to a forming station 12, where they are deposited on a belt and pre-compressed into a fiber mat.

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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)
  • Paper (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Prostheses (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Removal Of Floating Material (AREA)
  • Photoreceptors In Electrophotography (AREA)

Claims (10)

  1. Procédé de fabrication de matériau cellulosique défibré, de préférence en fibres de bois dont la longueur peut, en particulier, aller jusqu'a 20 mm, qui comporte une forte proportion de résine thermodurcissable et qui convient spécialement pour la fabrication de pièces moulées à base de fibres, la résine thermodurcissable étant ajoutée en solution aqueuse, de préférence alcaline, à un mélange de particules fibreuses et de vapeur d'eau et la vapeur d'eau étant séparée, dans un séchoir, d'avec les particules fibreuses enrobées de résine, procédé caractérisé en ce que la vapeur d'eau est, après l'addition de résine, séparée, dans une installation, de son mélange avec les particules fibreuses et que les particules fibreuses sont ensuite séchées, au cours d'une étape de séchage, jusqu'à l'obtention d'un degré d'humidité inférieur à 12 % en poids, en particulier de 3 à 10 % en poids.
  2. Procédé selon la revendication 1, caractérisé en ce que la séparation de la vapeur d'eau est effectuée dans un cyclone, de préférence sans apport d'énergie.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'étape de séchage se déroule en présence d'air chaud, de préférence à une température de 60 à 110°C.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce qu'on dépose la résine thermodurcissable en solution aqueuse sur les particules fibreuses amenées dans un courant de vapeur d'eau, on transporte, par un tuyau refroidi de l'extérieur, le mélange de particules fibreuses imprégnées, on élimine ensuite complètement la vapeur d'eau et on réalise finalement le séchage.
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que le courant de vapeur d'eau est acheminé avec les particules fibreuses sous haute pression, de préférence de 2 à 10 bar, en particulier de 4 à 6 bar, en écoulement turbulent.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que la proportion de résine ajoutée est de 200 à 1000 g, de préférence de 300 à 600 g, pour 1000 g de particules fibreuses (poids sec).
  7. Procédé selon une des revendications 1 à 6, caractérisé en ce que la vapeur d'eau séparée est utilisée pour le chauffage des copeaux de bois restant encore à défibrer.
  8. Procédé selon une des revendications 1 à 7, caractérisé en ce que les particules fibreuses sont, après l'étape de séchage, séparées de l'air de séchage, de préférence dans un cyclone supplémentaire.
  9. Procédé selon une des revendications 1 à 8, caractérisé en ce que, pour le défibrage du matériau cellulosique, on fragmente, sous pression de vapeur d'eau, des particules de cellulose, en particulier des copeaux de bois, jusqu'à une longueur maximale des fibres de 20 mm, on entraîne les particules fibreuses obtenues, mélangées à la vapeur d'eau sous pression élevée, de préférence de 2 à 10 bar, en particulier de 4 à 6 bar, dans une soufflerie et on pulvérise la solution aqueuse de résine dans ladite soufflerie.
  10. Panneau décoratif, comportant une couche interne et des couches superficielles, décoratives sur une ou deux faces, caractérisé en ce que la couche interne se compose des fibres de bois fabriquées d'après la revendication 1, fibres qui sont comprimées à chaud avec une résine artificielle thermodurcissable.
EP88113246A 1987-08-22 1988-08-16 Méthode de préparation de matériau cellulosique défibré, en particulier des fibres de bois, pour la fabrication des panneaux de fibres Revoked EP0304764B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113246T ATE86166T1 (de) 1987-08-22 1988-08-16 Verfahren zur herstellung von zerfasertem zellulosematerial, insbesondere holzfasern, fuer die herstellung von faserplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3728123 1987-08-22
DE19873728123 DE3728123A1 (de) 1987-08-22 1987-08-22 Verfahren zur herstellung von zerfasertem zellulosematerial, insbesondere holzfasern, fuer die herstellung von faserplatten

Publications (3)

Publication Number Publication Date
EP0304764A2 EP0304764A2 (fr) 1989-03-01
EP0304764A3 EP0304764A3 (en) 1989-11-29
EP0304764B1 true EP0304764B1 (fr) 1993-03-03

Family

ID=6334325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113246A Revoked EP0304764B1 (fr) 1987-08-22 1988-08-16 Méthode de préparation de matériau cellulosique défibré, en particulier des fibres de bois, pour la fabrication des panneaux de fibres

Country Status (10)

Country Link
US (1) US4937100A (fr)
EP (1) EP0304764B1 (fr)
JP (1) JPS6471704A (fr)
AT (1) ATE86166T1 (fr)
AU (1) AU601868B2 (fr)
CA (1) CA1295441C (fr)
DE (2) DE3728123A1 (fr)
DK (1) DK167428B1 (fr)
FI (1) FI883833A (fr)
NO (1) NO170465C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10037983B4 (de) * 2000-08-03 2006-04-13 Stefan Zikeli Polymerzusammensetzung und daraus hergestellter Formkörper mit einem Gehalt an Alkaloid

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3891143T1 (de) * 1987-12-16 1990-09-20 Sunds Defibrator Verfahren und vorrichtung zum herstellen von faserplatten
US5064689A (en) 1989-03-20 1991-11-12 Weyerhaeuser Company Method of treating discontinuous fibers
US5432000A (en) 1989-03-20 1995-07-11 Weyerhaeuser Company Binder coated discontinuous fibers with adhered particulate materials
US5230959A (en) 1989-03-20 1993-07-27 Weyerhaeuser Company Coated fiber product with adhered super absorbent particles
US5498478A (en) 1989-03-20 1996-03-12 Weyerhaeuser Company Polyethylene glycol as a binder material for fibers
AU665532B2 (en) * 1991-04-26 1996-01-11 Enviroflex Pty. Ltd. Insulation pellets and a process for producing same
CA2126240A1 (fr) 1991-12-17 1993-06-24 Paul Gaddis Melangeur a tremie et methode de revetement de fibres
DE19515734A1 (de) * 1995-05-03 1996-11-07 Schenkmann & Piel Verfahrenste Verfahren zur Herstellung von Holzfasern
DE19746383A1 (de) * 1997-10-21 1999-04-22 Hofa Homann Gmbh & Co Kg Verfahren und Vorrichtung zur Herstellung von Faserplatten sowie nach dem Verfahren hergestellte Faserplatten
IE990100A1 (en) 1998-10-30 2000-05-03 Masonite Corp Method of making molded Composite articles
US7410687B2 (en) * 2004-06-08 2008-08-12 Trex Co Inc Variegated composites and related methods of manufacture
DE102004062649C5 (de) 2004-12-21 2013-06-06 Kronotec Ag Verfahren zur Herstellung einer Holzfaserdämmstoffplatte bzw.-matte und nach diesem Verfahren hergestellte Holzfaserdämmstoffplatten bzw.-matten
WO2006092603A1 (fr) * 2005-03-02 2006-09-08 University Of Wales, Bangor Traitement de fibres longues dans un flux gazeux à haute pression
DE102008026677B3 (de) * 2008-06-04 2009-10-22 Kronotec Ag Verfahren zum Trocknen von lignocellulosehaltigen Fasern und Dampfabscheider zur Verwendung in dem Verfahren
DE102008056650A1 (de) * 2008-11-10 2010-05-12 Martin Dreisman Zusammensetzung und Verfahren zur Herstellung einer Holz- oder Holzfaserplatte
AT509429B1 (de) * 2010-01-20 2016-09-15 Erema Verfahren zur herstellung eines mit längeren fasern gefüllten polymeren materials
IT1399772B1 (it) 2010-04-30 2013-05-03 Imal Srl Apparato per l'iniezione di componenti chimici in un flusso di materiale legnoso incoerente
UA114281C2 (uk) * 2010-10-01 2017-05-25 Кроноплас Текнікел Аг Спосіб і установка для склеювання деревних часток
CA2872839A1 (fr) * 2012-06-01 2013-12-05 Dieffenbacher GmbH Maschinen- und Anlagenbau Coude pour introduire un courant de vapeur et de fibres dans un sechoir ou un cuvier de stockage de la pulpe d'une usine de traitement de fibres, installation de soufflage avec un coude, et usine de traitement de fibres avec une installation de soufflage
AT514330B1 (de) * 2013-08-01 2014-12-15 Andritz Ag Maschf Anlage und Verfahren zum Verarbeiten von Faserstoffen
AT514329B1 (de) * 2013-08-01 2014-12-15 Andritz Ag Maschf Anlage und Verfahren zum Verarbeiten von Faserstoffen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817617A (en) * 1953-03-19 1957-12-24 Hugh R Rogers Process of manufacturing board-like articles
DE3147989A1 (de) 1981-12-04 1983-06-16 Hoechst Ag, 6230 Frankfurt Dekoratives, insbesondere plattenfoermiges formteil, verfahren zu seiner herstellung und seine verwendung
DE3418282A1 (de) * 1984-05-17 1985-11-21 Hoechst Ag, 6230 Frankfurt Dekorative platte mit verbesserten oberflaecheneigenschaften
DE3609506A1 (de) * 1985-03-25 1986-10-30 Koppers Co., Inc., Pittsburgh, Pa. Verfahren zum herstellen einer masse aus zelluloseteilchen und harz fuer die herstellung von faserplatten
DE3533737A1 (de) * 1985-09-21 1987-03-26 Hoechst Ag Dekorative platte mit verbesserten oberflaecheneigenschaften

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10037983B4 (de) * 2000-08-03 2006-04-13 Stefan Zikeli Polymerzusammensetzung und daraus hergestellter Formkörper mit einem Gehalt an Alkaloid

Also Published As

Publication number Publication date
DK465988A (da) 1989-02-23
DE3878785D1 (de) 1993-04-08
ATE86166T1 (de) 1993-03-15
NO883735L (no) 1989-02-23
EP0304764A2 (fr) 1989-03-01
FI883833A0 (fi) 1988-08-18
FI883833A (fi) 1989-02-23
JPS6471704A (en) 1989-03-16
DE3728123A1 (de) 1989-03-02
US4937100A (en) 1990-06-26
AU2107488A (en) 1989-02-23
NO170465C (no) 1992-10-21
NO883735D0 (no) 1988-08-19
DK465988D0 (da) 1988-08-19
AU601868B2 (en) 1990-09-20
EP0304764A3 (en) 1989-11-29
CA1295441C (fr) 1992-02-11
NO170465B (no) 1992-07-13
DK167428B1 (da) 1993-11-01

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