EP0255950A2 - Method of manufacturing fibre boards - Google Patents

Method of manufacturing fibre boards Download PDF

Info

Publication number
EP0255950A2
EP0255950A2 EP87111367A EP87111367A EP0255950A2 EP 0255950 A2 EP0255950 A2 EP 0255950A2 EP 87111367 A EP87111367 A EP 87111367A EP 87111367 A EP87111367 A EP 87111367A EP 0255950 A2 EP0255950 A2 EP 0255950A2
Authority
EP
European Patent Office
Prior art keywords
hardboard
pressure
boards
pressure vessel
drying
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.)
Granted
Application number
EP87111367A
Other languages
German (de)
French (fr)
Other versions
EP0255950B1 (en
EP0255950A3 (en
Inventor
Wilhelm Dipl.-Ing. Strack
Wilhelm Jägerfeld
Wolf Dr. Dipl.-Chem. Dietrich
Eberhard Dr. Dipl.-Chem. Giebeler
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.)
Homanit & Cokg GmbH
Ruetgers Germany GmbH
Original Assignee
Homanit & Cokg GmbH
Ruetgerswerke AG
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 Homanit & Cokg GmbH, Ruetgerswerke AG filed Critical Homanit & Cokg GmbH
Priority to AT87111367T priority Critical patent/ATE86911T1/en
Publication of EP0255950A2 publication Critical patent/EP0255950A2/en
Publication of EP0255950A3 publication Critical patent/EP0255950A3/en
Application granted granted Critical
Publication of EP0255950B1 publication Critical patent/EP0255950B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B27N9/00—Arrangements for fireproofing
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00—Purpose of the treatment
    • B27K2240/70—Hydrophobation treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds

Definitions

  • the invention relates to a method for producing hardboard, in which the hardboard is subjected to an impregnation treatment after it has been produced.
  • hardboard The impregnation of hardboard is known per se. By using an impregnation process, hardboard can be refined into a wide variety of products with different surface properties.
  • a disadvantage of the known hardboard is that it normally exhibits a fire behavior that corresponds to fire class B 2 according to DIN 4102.
  • the known hardboard is therefore normally flammable.
  • the finished raw plates are exposed to a negative pressure in a pressure vessel, the plates being soaked while maintaining the negative pressure after the negative pressure has been applied.
  • a vacuum of 85% is generated in the pressure vessel. This negative pressure is maintained for about 2 minutes to 2 hours. An evacuation time of 10 minutes is preferred.
  • the salt must meet DIN standard 68 800, which relates to resistance to fungal attack.
  • the impregnation can advantageously be carried out in the boiler pressure process.
  • raw plates are used which show a low swelling behavior from the outset, so that the impregnation of the raw plates presents no difficulties.
  • the invention is accordingly based on the object of providing a method of the type mentioned at the outset, in which it is possible to produce hardboard which is flame-retardant and which achieves fire class B1 according to DIN 4102.
  • the hardboard consists of resin-bonded pressed wood fibers and are provided with a paraffin emulsion and / or other water repellents and that the plates are soaked with an aqueous salt solution so that after drying 100 to 300 kg of salt mixture included per m3.
  • a salt mixture based on phosphate-borate is particularly suitable as the impregnation salt.
  • ammonium phosphates and borates but also urea, melamine or guanyl urea phosphates can be used.
  • the salt mixtures can also contain fluorides, guanidine sulfonates and chromium, copper and / or zinc salts.
  • the plates are then removed from the pressure vessel and subjected to drying at about 80 ° C.
  • This drying can take place in a drying cabinet or in a vacuum dryer at a vacuum of about 20%.
  • the hardboard produced in this way can be painted, coated and / or laminated.
  • the method according to the invention is particularly suitable for hardboard with a thickness of about 2 to 6 mm, since the continuous impregnation is guaranteed for boards of this thickness.
  • the method according to the invention can also be applied to medium-hard wood fiber boards with a bulk density (board weight) of about 350 kg / m3 to 800 kg / m3.
  • porous wood fiber boards with a bulk density (board weight) of about 200 kg / m3 to about 400 kg / m3 is also possible.
  • a trough is provided in a device for carrying out the method according to the invention, in which the wood fiber raw boards are placed one above the other with the interposition of spacers, rods, wires or the like.
  • a tub on the one hand facilitates loading and removal from the pressure vessel and on the other hand saves liquid, since only the tub and not the entire pressure vessel has to be filled with liquid during the process.
  • the tub in particular also facilitates the removal of the liquid used, which is fed to a storage container and consequently can be reused in the manner described.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Connection Of Plates (AREA)
  • Paper (AREA)

Abstract

Method of manufacturing fibre boards, in which the fibre boards, after manufacture, are subjected to an impregnation treatment by which it is possible to manufacture fibre boards which are hardly flammable and which attain fire classification B1 according to DIN 4102. For this purpose, according to the invention the fibre boards are to consist of resinoid-bonded compressed wood fibres and are to be provided with a paraffin emulsion and/or other waterproofing agents, and the boards are to be impregnated with an aqueous salt solution so that they contain, after subsequent drying, 100 to 300 kg of salt mixture per m<3>.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Hart­faserplatten, bei welchem die Hartfaserplatten nach ihrer Her­stellung einer Imprägnierungsbehandlung unterzogen werden.The invention relates to a method for producing hardboard, in which the hardboard is subjected to an impregnation treatment after it has been produced.

Das Imprägnieren von Hartfaserplatten ist an sich bekannt. Durch die Anwendung eines Imprägnierverfahrens lassen sich Hartfaser­platten zu den verschiedensten Produkten mit verschiedenen Ober­flächeneigenschaften veredeln.The impregnation of hardboard is known per se. By using an impregnation process, hardboard can be refined into a wide variety of products with different surface properties.

Nachteilig bei den bekannten Hartfaserplatten ist es jedoch, daß diese normalerweise ein Brandverhalten zeigen, das der Brandklasse B 2 nach DIN 4102 entspricht. Die bekannten Hartfaserplatten sind also normal entflammbar.A disadvantage of the known hardboard, however, is that it normally exhibits a fire behavior that corresponds to fire class B 2 according to DIN 4102. The known hardboard is therefore normally flammable.

Bei einer speziellen Ausgestaltung des Kesseldruckverfahrens werden die fertiggestellten Rohplatten in einem Druckbehälter einem Unterdruck ausgesetzt, wobei nach Aufbringung des Unter­druckes die Platten unter Aufrechterhaltung des Unterdruckes getränkt werden.In a special embodiment of the boiler pressure process, the finished raw plates are exposed to a negative pressure in a pressure vessel, the plates being soaked while maintaining the negative pressure after the negative pressure has been applied.

Mit dieser Behandlung kommt es nämlich zu einer einwandfreien Füllung der Kapillaren und Fasern der Hartfaserplatten.With this treatment there is a perfect filling of the capillaries and fibers of the hardboard.

Es kann auch vom Unterdruck langsam auf einen Überdruck über­gegangen werden, indem die Salzlösung zusammen mit Luft in den Druckbehälter langsam eingegeben wird, bis in diesem ein Über­druck von etwa 2 bis 15 bar erreicht ist. Zweckmäßigerweise kann ein Überdruck von 8 bar angewendet werden.It is also possible to slowly switch from the negative pressure to an excess pressure by slowly adding the salt solution together with air into the pressure container until an excess pressure of approximately 2 to 15 bar is reached in the latter. An overpressure of 8 bar can expediently be used.

Bei einer bevorzugten Ausführungsform des Verfahrens wird in dem Druckbehälter ein Unterdruck von 85 % erzeugt. Dieser Unter­druck wird für etwa 2 min bis 2 h aufrechterhalten. Vorzugsweise kommt eine Evakuierungszeit von 10 min in Betracht.In a preferred embodiment of the method, a vacuum of 85% is generated in the pressure vessel. This negative pressure is maintained for about 2 minutes to 2 hours. An evacuation time of 10 minutes is preferred.

Als besonders zweckmäßig hat es sich erwiesen, wenn die Eingabe der Salzlösung zusammen mit der Luft bis zur Erreichung des Überdruckes innerhalb einer Zeit von etwa 30 min erfolgt.It has proven to be particularly expedient if the salt solution is introduced together with the air within a time of about 30 minutes until the excess pressure is reached.

Ein zusätzlicher Vorteil dieser Salze besteht darin, daß sie sowohl fungizide als auch insektizide Eigenschaften besitzen.An additional advantage of these salts is that they have both fungicidal and insecticidal properties.

Als besonders vorteilhaft in Bezug auf den Faserinhalt der Hartfaserplatten hat es sich erwiesen, wenn etwa 200 kg Salzgemisch pro m³ Hartfaserplatte angewendet werden.It has proven to be particularly advantageous with regard to the fiber content of the hardboard if approximately 200 kg of salt mixture are used per m³ of hardboard.

Das Salz muß die DIN-Norm 68 800 erfüllen, die sich auf Widerstandsfähigkeit gegen Pilzbefall bezieht.The salt must meet DIN standard 68 800, which relates to resistance to fungal attack.

In vorteilhafter Weise kann die Imprägnierung im Kesseldruck­verfahren erfolgen. Bei diesem Verfahren werden Rohplatten verwendet, die von vornherein ein geringes Quellverhalten zeigen, so daß die Tränkung der Rohplatten keine Schwierig­keiten macht.The impregnation can advantageously be carried out in the boiler pressure process. In this process raw plates are used which show a low swelling behavior from the outset, so that the impregnation of the raw plates presents no difficulties.

Trotz der hohen Rohdichte der erfindungsgemäß eingesetzten Hartfaserplatten von mehr als 800 kg/m³ und trotz der vorher­gehenden Behandlung mit Hydrophobierungsmitteln, wird eine einwandfreie, insbesondere durchgehende Tränkung und damit durchgehende Imprägnierung während des Kesseldruckverfahrens erreicht.Despite the high bulk density of the hardboard used according to the invention of more than 800 kg / m³ and despite the previous treatment with water repellents, a perfect, in particular continuous impregnation and thus continuous impregnation is achieved during the boiler pressure process.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, bei welchem es möglich ist, Hartfaserplatten herzustellen, die schwerentflammbar sind und die nach DIN 4102 die Brandklasse B 1 erreichen.The invention is accordingly based on the object of providing a method of the type mentioned at the outset, in which it is possible to produce hardboard which is flame-retardant and which achieves fire class B1 according to DIN 4102.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Hart­faserplatten aus mit Kunstharz gebundenen gepreßten Holzfasern bestehen und mit einer Paraffinemulsion und/oder anderen Hydro­phobierungsmitteln versehen sind und daß die Platten mit einer wäßrigen Salzlösung so getränkt werden, daß sie nach anschließen­dem Trocknen 100 bis 300 kg Salzgemisch pro m³ enthalten.This object is achieved in that the hardboard consists of resin-bonded pressed wood fibers and are provided with a paraffin emulsion and / or other water repellents and that the plates are soaked with an aqueous salt solution so that after drying 100 to 300 kg of salt mixture included per m³.

Im Gegensatz zu bekannten Verfahren, bei denen bei Holzfaser­platten lediglich die Oberflächen imprägniert werden, wird es mit dem erfindungsgemäßen Verfahren ohne weiteres möglich, Hartfaserplatten durchgehend zu imprägnieren, so daß das Brand­verhalten nach DIN 4102 mindestens der Brandklasse B 1 entspricht.In contrast to known methods in which only the surfaces of wood fiber boards are impregnated, it is readily possible with the method according to the invention to impregnate hard fiber boards throughout, so that the fire behavior according to DIN 4102 corresponds at least to fire class B1.

Als Imprägnierungssalz kommt insbesondere ein Salzgemisch auf Phosphat-Borat-Basis in Betracht. Hierbei können Ammoniumphosphate und -borate, aber auch Harnstoff-, Melamin- oder Guanylharnstoff­phosphate eingesetzt werden. Ferner können die Salzgemische Fluoride, Guanidinsulfonate sowie Chrom-, Kupfer- und/oder Zinksalze enthalten.A salt mixture based on phosphate-borate is particularly suitable as the impregnation salt. Here ammonium phosphates and borates, but also urea, melamine or guanyl urea phosphates can be used. The salt mixtures can also contain fluorides, guanidine sulfonates and chromium, copper and / or zinc salts.

Anschließend werden die Platten aus dem Druckbehälter ent­nommen und bei etwa 80° C einer Trocknung unterworfen.The plates are then removed from the pressure vessel and subjected to drying at about 80 ° C.

Diese Trocknung kann in einem Trockenschrank oder auch in einem Vakuumtrockner bei einem Vakuum von etwa 20 % erfolgen.This drying can take place in a drying cabinet or in a vacuum dryer at a vacuum of about 20%.

Die auf diese Weise fertiggestellte Hartfaserplatte kann lackiert, beschichtet und/oder kaschiert werden.The hardboard produced in this way can be painted, coated and / or laminated.

Das erfindungsgemäße Verfahren ist insbesondere geeignet für Hartfaserplatten mit einer Dicke von etwa 2 bis 6 mm, da bei Platten dieser Dicke die durchgehende Imprägnierung gewähr­leistet ist.The method according to the invention is particularly suitable for hardboard with a thickness of about 2 to 6 mm, since the continuous impregnation is guaranteed for boards of this thickness.

Wie bei Hartfaserplatten üblich, haben diese eine Rohdichte von mehr als 800 kg/m³.As is usual with hardboard, these have a bulk density of more than 800 kg / m³.

Das erfindungsgemäße Verfahren kann aber auch angewendet werden auf mittelharte Holzfaserplatten mit einer Rohdichte (Plattengewicht) von etwa 350 kg/m³ bis 800 kg/m³.However, the method according to the invention can also be applied to medium-hard wood fiber boards with a bulk density (board weight) of about 350 kg / m³ to 800 kg / m³.

Auch die Anwendung des erfindungsgemäßen Verfahrens auf poröse Holzfaserplatten mit einer Rohdichte (Plattengewicht) von etwa 200 kg/m³ bis etwa 400 kg/m³ kommt in Betracht.The application of the method according to the invention to porous wood fiber boards with a bulk density (board weight) of about 200 kg / m³ to about 400 kg / m³ is also possible.

Zweckmäßig kann es sein, wenn bei einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens eine Wanne vor­gesehen ist, in welche die Holzfaserrohplatten unter Zwischen­lage von Distanzstücken, -stäben, -drähten od. dgl. über­einander eingelagert werden. Eine solche Wanne erleichtert einerseits die Beschickung und die Entnahme aus dem Druck­behälter und spart andererseits Flüssigkeit, da nur die Wanne und nicht der gesamte Druckbehälter während des Ver­fahrens mit Flüssigkeit gefüllt werden muß. Die Wanne er­leichtert insbesondere auch die Entnahme der verwendeten Flüssigkeit, die einem Vorratsbehälter zugeführt wird und demzufolge in der beschriebenen Weise wiederverwendet werden kann.It may be expedient if a trough is provided in a device for carrying out the method according to the invention, in which the wood fiber raw boards are placed one above the other with the interposition of spacers, rods, wires or the like. Such a tub on the one hand facilitates loading and removal from the pressure vessel and on the other hand saves liquid, since only the tub and not the entire pressure vessel has to be filled with liquid during the process. The tub in particular also facilitates the removal of the liquid used, which is fed to a storage container and consequently can be reused in the manner described.

Nach dem Ablassen der Flüssigkeit aus der Wanne wird diese im trockenen Zustand erneut beschickt und die Flüssigkeit nach Aufbau des Unterdruckes eingegeben.After draining the liquid from the tub, it is loaded again in the dry state and the liquid is entered after the negative pressure has built up.

Claims (22)

1. Verfahren zur Herstellung von Hartfaserplatten, bei welchem die Hartfaserplatten nach ihrer Herstellung einer Impräg­nierungsbehandlung unterzogen werden, dadurch gekennzeichnet, daß die Hartfaserplatten aus mit Kunstharz gebundenen gepreßten Holzfasern bestehen und mit einer Paraffinemulsion und/oder anderen Hydrophobierungsmitteln versehen sind und daß die Platten mit einer wäßrigen Salzlösung so getränkt werden, daß sie nach anschließendem Trocknen 100 bis 300 kg Salzgemisch pro m³ enthalten.1. A process for the production of hardboard, in which the hardboard is subjected to an impregnation treatment after it has been produced, characterized in that the hardboard consists of pressed wood fibers bonded with synthetic resin and is provided with a paraffin emulsion and / or other hydrophobizing agents, and that the boards are provided with a aqueous salt solution are soaked that they contain 100 to 300 kg of salt mixture per m³ after subsequent drying. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Salzgemisch auf Phosphat-Borat-Basis verwendet wird.2. The method according to claim 1, characterized in that a salt mixture based on phosphate-borate is used. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß Ammoniumphosphate und -borate verwendet werden.3. The method according to claim 2, characterized in that ammonium phosphates and borates are used. 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß Harnstoff-, Melamin- oder Guanylharnstoffphosphate ver­wendet werden.4. The method according to claim 2, characterized in that urea, melamine or guanyl urea phosphates are used. 5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das Salzgemisch Fluoride, Guanidin­sulfonate sowie Chrom-, Kupfer- und/oder Zinksalze enthält.5. The method according to any one of claims 2 to 4, characterized in that the salt mixture contains fluorides, guanidine sulfonates and chromium, copper and / or zinc salts. 6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß nach dem Trocknen 200 kg Salzgemisch pro m³ Hartfaserplatte vorliegen.6. The method according to any one of the preceding claims, characterized in that 200 kg of salt mixture per m³ hardboard are present after drying. 7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Tränkung der Rohplatten im Kessel­druckverfahren geschieht.7. The method according to any one of the preceding claims, characterized in that the impregnation of the raw plates takes place in the boiler pressure process. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die fertiggestellten Rohplatten in einem Druckbehälter einem Unterdruck ausgesetzt werden, wobei nach Aufbringung des Unterdruckes die Platten unter dessen Aufrechterhaltung getränkt werden.8. The method according to claim 7, characterized in that the finished raw plates are exposed to a negative pressure in a pressure vessel, the plates being impregnated while maintaining the negative pressure. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß vom Unterdruck langsam auf einen Überdruck übergegangen wird, indem die Salzlösung zusammen mit Luft in den Druckbehälter langsam eingegeben wird, bis in diesem ein Überdruck von etwa 2 bis 15 bar erreicht ist.9. The method according to claim 8, characterized in that the negative pressure is slowly passed to an excess pressure by slowly entering the salt solution together with air into the pressure vessel until an excess pressure of approximately 2 to 15 bar is reached in this. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß in dem Druckbehälter ein Überdruck von etwa 8 bar erreicht wird.10. The method according to claim 9, characterized in that an excess pressure of about 8 bar is reached in the pressure vessel. 11. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in dem Druckbehälter ein Unterdruck von 85 % erzeugt wird.11. The method according to any one of the preceding claims, characterized in that a negative pressure of 85% is generated in the pressure vessel. 12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß der Unterdruck für etwa 2 min bis 2 h aufrechterhalten wird.12. The method according to claim 11, characterized in that the negative pressure is maintained for about 2 min to 2 h. 13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß der Unterdruck für eine Zeit von etwa 10 min aufrechterhalten wird.13. The method according to claim 12, characterized in that the negative pressure is maintained for a time of about 10 min. 14. Verfahren nach einem der Ansprüche 9 bis 13, dadurch gekenn­zeichnet, daß die Eingabe der Salzlösung zusammen mit der Luft bis zur Erreichung des Überdruckes innerhalb einer Zeit von etwa 30 min erfolgt.14. The method according to any one of claims 9 to 13, characterized in that the input of the salt solution takes place together with the air until the overpressure is reached within a time of about 30 minutes. 15. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß nach der Behandlung in dem Druckbehälter die Platten aus dem Druckbehälter entnommen und bei etwa 80° C einer Trocknung unterworfen werden.15. The method according to any one of the preceding claims, characterized in that after the treatment in the pressure vessel, the plates are removed from the pressure vessel and subjected to drying at about 80 ° C. 16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die Trocknung in einem Trockenschrank erfolgt.16. The method according to claim 15, characterized in that the drying takes place in a drying cabinet. 17. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die Trocknung in einem Vakuumtrockner bei einem Vakuum von etwa 20 % erfolgt.17. The method according to claim 15, characterized in that the drying is carried out in a vacuum dryer at a vacuum of about 20%. 18. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die fertiggestellte Hartfaserplatte lackiert, beschichtet und/oder kaschiert wird.18. The method according to any one of the preceding claims, characterized in that the finished hardboard is painted, coated and / or laminated. 19. Anwendung des erfindungsgemäßen Verfahrens auf Hartfaser­platten mit einer Dicke von etwa 2 bis 6 mm und einer Roh­dichte von mehr als 800 kg/m³.19. Application of the method according to the invention on hardboard with a thickness of about 2 to 6 mm and a bulk density of more than 800 kg / m³. 20. Anwendung des erfindungsgemäßen Verfahrens auf mittel­harte Holzfaserplatten mit einer Rohdichte (Platten­gewicht) von etwa 350 kg/m³ bis 800 kg/m³.20. Application of the method according to the invention on medium-hard wood fiber boards with a bulk density (board weight) of about 350 kg / m³ to 800 kg / m³. 21. Anwendung des erfindungsgemäßen Verfahrens auf poröse Holzfaserplatten mit einer Rohdichte (Plattengewicht) von etwa 200 kg/m³ bis etwa 400 kg/m³.21. Application of the method according to the invention on porous wood fiber boards with a bulk density (board weight) of about 200 kg / m³ to about 400 kg / m³. 22. Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens, dadurch gekennzeichnet, daß eine Wanne vor­gesehen ist, in welche die Holzfaserrohplatten unter Zwischenlage von Distanzstücken, -stäben, -drähten od. dgl. übereinander eingelagert werden und auf die Wanne zusammen mit den Holzfaserrohplatten in den Druckbehälter einbring­bar ist.22. Apparatus for carrying out the method according to the invention, characterized in that a trough is provided, in which the wood fiber raw boards with the interposition of spacers, rods, wires or the like are stored one above the other and onto the tub together with the wood fiber raw boards in the pressure vessel can be introduced.
EP87111367A 1986-08-07 1987-08-06 Method of manufacturing fibre boards Expired - Lifetime EP0255950B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111367T ATE86911T1 (en) 1986-08-07 1987-08-06 PROCESS FOR THE MANUFACTURE OF HARDBOARD.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3626767 1986-08-07
DE3626767 1986-08-07
DE3712381 1987-04-11
DE3712381 1987-04-11

Publications (3)

Publication Number Publication Date
EP0255950A2 true EP0255950A2 (en) 1988-02-17
EP0255950A3 EP0255950A3 (en) 1989-11-02
EP0255950B1 EP0255950B1 (en) 1993-03-17

Family

ID=25846347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111367A Expired - Lifetime EP0255950B1 (en) 1986-08-07 1987-08-06 Method of manufacturing fibre boards

Country Status (4)

Country Link
EP (1) EP0255950B1 (en)
AT (1) ATE86911T1 (en)
DE (1) DE3726108A1 (en)
FI (1) FI873431A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713536A1 (en) * 1993-12-14 1995-06-16 Rol Tech Sa Process for manufacturing panels from particles or fibres
EP0916460A1 (en) * 1997-11-17 1999-05-19 Lindauer Dornier Gesellschaft M.B.H Method for cooling of hot pressed boards, especially particle boards and fibreboards, and plant for carrying out the process
EP1043131A1 (en) * 1999-03-31 2000-10-11 Yi-Ho Ko Bamboo board and method of producing the same
EP2607032A1 (en) * 2011-12-19 2013-06-26 Kronotec AG Method of reducing the emissions of fleeting organic compounds in wooden materials and wooden material
WO2017194420A1 (en) * 2016-05-09 2017-11-16 Fritz Egger Gmbh & Co. Og Fibreboard with increased resistance to fungal attack and method for producing the same
DE102017203086A1 (en) 2017-02-24 2018-08-30 Cefla Deutschland Gmbh Process for the production of a flame-retardant and / or consolidated wood fiber board

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104385428B (en) * 2014-09-18 2016-05-11 朱奎 Ripple plate is inhaled in a kind of fire prevention
CN108943250A (en) * 2018-06-29 2018-12-07 广西浙缘农业科技有限公司 A kind of processing method of artificial chipboard

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB337133A (en) * 1929-09-18 1930-10-30 Charles Goodall Improvements relating to the impregnation of timber
US2931737A (en) * 1957-07-30 1960-04-05 Hickson S Timber Impregnation Impregnation process
DE1492551A1 (en) * 1960-10-17 1969-01-30 Arvidsson E Method and device for impregnating, preferably wood
US3516851A (en) * 1967-04-25 1970-06-23 Heinolan Faneritehdas Zacharia Method of treatment of a porous substance,especially treatment of semisolid wallboard with fire- and other extinguishing substances
US3840388A (en) * 1972-05-26 1974-10-08 Canadian Wood Council Fire-retardant treatment of wood laminae
US3935343A (en) * 1972-02-07 1976-01-27 United States Gypsum Company Molten salt method of producing fire resistant wood articles
DE2904041A1 (en) * 1978-04-04 1979-10-11 Fischer Ag Brugg Georg PROCESS AND DEVICE FOR CONSOLIDATING THE EDGE AREA OF PANELS MADE OF A POROUS MATERIAL
US4343840A (en) * 1981-02-27 1982-08-10 Old-North Manufacturing Company, Inc. Method and apparatus for treating cellulosic products

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520780A1 (en) * 1984-09-06 1986-03-13 Murillo Contreras, Jesús, México FIRE-RETARDANT

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB337133A (en) * 1929-09-18 1930-10-30 Charles Goodall Improvements relating to the impregnation of timber
US2931737A (en) * 1957-07-30 1960-04-05 Hickson S Timber Impregnation Impregnation process
DE1492551A1 (en) * 1960-10-17 1969-01-30 Arvidsson E Method and device for impregnating, preferably wood
US3516851A (en) * 1967-04-25 1970-06-23 Heinolan Faneritehdas Zacharia Method of treatment of a porous substance,especially treatment of semisolid wallboard with fire- and other extinguishing substances
US3935343A (en) * 1972-02-07 1976-01-27 United States Gypsum Company Molten salt method of producing fire resistant wood articles
US3840388A (en) * 1972-05-26 1974-10-08 Canadian Wood Council Fire-retardant treatment of wood laminae
DE2904041A1 (en) * 1978-04-04 1979-10-11 Fischer Ag Brugg Georg PROCESS AND DEVICE FOR CONSOLIDATING THE EDGE AREA OF PANELS MADE OF A POROUS MATERIAL
US4343840A (en) * 1981-02-27 1982-08-10 Old-North Manufacturing Company, Inc. Method and apparatus for treating cellulosic products

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TASCHENBURCH DER HOLZTECHNOLOGIE, 1966, Seite 149, Veb Fachbuchverlag, Leipzig, CH; "Hydrophobierungsmittel" *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713536A1 (en) * 1993-12-14 1995-06-16 Rol Tech Sa Process for manufacturing panels from particles or fibres
EP0916460A1 (en) * 1997-11-17 1999-05-19 Lindauer Dornier Gesellschaft M.B.H Method for cooling of hot pressed boards, especially particle boards and fibreboards, and plant for carrying out the process
US6126883A (en) * 1997-11-17 2000-10-03 Lindauer Dornier Gesellschaft Mbh Method and apparatus for cooling hot-pressed panels, especially wood chip and fiber panels
EP1043131A1 (en) * 1999-03-31 2000-10-11 Yi-Ho Ko Bamboo board and method of producing the same
EP2607032A1 (en) * 2011-12-19 2013-06-26 Kronotec AG Method of reducing the emissions of fleeting organic compounds in wooden materials and wooden material
WO2017194420A1 (en) * 2016-05-09 2017-11-16 Fritz Egger Gmbh & Co. Og Fibreboard with increased resistance to fungal attack and method for producing the same
DE102017203086A1 (en) 2017-02-24 2018-08-30 Cefla Deutschland Gmbh Process for the production of a flame-retardant and / or consolidated wood fiber board
EP3388213A2 (en) 2017-02-24 2018-10-17 Cefla Deutschland GmbH Method for producing a wood-fibre board which is barely flammable and/or solidified

Also Published As

Publication number Publication date
FI873431A0 (en) 1987-08-07
FI873431A (en) 1988-02-08
EP0255950B1 (en) 1993-03-17
ATE86911T1 (en) 1993-04-15
EP0255950A3 (en) 1989-11-02
DE3726108A1 (en) 1988-02-11

Similar Documents

Publication Publication Date Title
DE3486310T2 (en) Process for assembled wood products.
DE2824110C2 (en) Process for the manufacture of a porous, self-supporting filter tube and its use
DE2853843C2 (en) Method of making a non-woven sheet of loofah fiber material
DE1719297C3 (en) Fasnge paper web and food casings made from it
EP0255950A2 (en) Method of manufacturing fibre boards
DE2732287B2 (en) Process for producing an insole material provided with activated carbon
DE1108284B (en) Process for the production of separators for accumulators from a cellulose fiber fleece
DE1619252B2 (en) ARTIFICIAL LEATHER AND METHOD OF MANUFACTURING THE SAME
DE202005006966U1 (en) Electrically conductive plate consisting of a wood material comprises a bonding agent based on polyisocyanates, and has a residual moisture with a specified minimum pH value
DE10006041A1 (en) Wood wool component and method for its production
EP0548758B1 (en) Board and method to manufacture it
DE19621606A1 (en) Fire retardant for boards or molded parts made of chips or fibers and process for fire-resistant finishing of such boards or molded parts
DE2945300C2 (en) Process for treating the surface of wood made fire-resistant
DE1091423B (en) Process for the production of flame-retardant impregnated hardboard using impregnating agents containing urea and ammonium phosphate
DE884274C (en) Process for the production of wood fiber boards
DE635727C (en) Isolation plates o. The like. And methods for their production
DE2124757A1 (en) Process for increasing the fire resistance of building materials, especially those based on cellulose
DE2307381A1 (en) PROCESS FOR IMPRAEGNATING OPEN-PORED, ELASTIC FOAM
DE3229826A1 (en) Method of treating freshly felled natural wood to improve the quality and accelerate the ageing and use thereof
DE1528251C (en) Process for treating wood chips with binders and impregnating agents
DE595711C (en) Pressed and dried intermediate layers made of wood for the railway superstructure
AT233464B (en) Flexible material resistant to the penetration of moisture vapor and a cover made from it
EP0428062B1 (en) Skirting board, process for its manufacture and apparatus for carrying out said process
DE331024C (en) Process for creating a waterproof coating on hygroscopic material
DE975286C (en) Process for the production of delignified wood-based materials

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900424

17Q First examination report despatched

Effective date: 19910614

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

PUAB Information related to the publication of an a document modified or deleted

Free format text: ORIGINAL CODE: 0009199EPPU

PUAC Information related to the publication of a b1 document modified or deleted

Free format text: ORIGINAL CODE: 0009299EPPU

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 86911

Country of ref document: AT

Date of ref document: 19930415

Kind code of ref document: T

DB1 Publication of patent cancelled
RA1 Application published (corrected)

Date of ref document: 19880217

Kind code of ref document: A2

18W Application withdrawn

Withdrawal date: 19930203

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GIEBELER, EBERHARD, DR. DIPL.-CHEM.

Inventor name: DIETRICH, WOLF, DR. DIPL.-CHEM.

Inventor name: JAEGERFELD, WILHELM

Inventor name: STRACK, WILHELM, DIPL.-ING.