EP3098043B1 - Procede de production d'un panneau en fibres presentant des caracteristiques mecaniques et chimiques ameliorees - Google Patents

Procede de production d'un panneau en fibres presentant des caracteristiques mecaniques et chimiques ameliorees Download PDF

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Publication number
EP3098043B1
EP3098043B1 EP16165123.7A EP16165123A EP3098043B1 EP 3098043 B1 EP3098043 B1 EP 3098043B1 EP 16165123 A EP16165123 A EP 16165123A EP 3098043 B1 EP3098043 B1 EP 3098043B1
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EP
European Patent Office
Prior art keywords
fiber board
wood fiber
pressure difference
impregnating material
board
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Application number
EP16165123.7A
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German (de)
English (en)
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EP3098043A1 (fr
Inventor
Gerhard Stahl
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.)
Cefla Deutschland GmbH
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Cefla Deutschland GmbH
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Publication of EP3098043A1 publication Critical patent/EP3098043A1/fr
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    • 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
    • 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
    • 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
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • B27K3/0285—Processes; Apparatus involving an additional treatment during or after impregnation for improving the penetration of the impregnating fluid
    • 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
    • B27K2200/00—Wooden materials to be treated
    • B27K2200/10—Articles made of particles or fibres consisting of wood or other lignocellulosic material

Definitions

  • the invention relates to a method for producing a fibreboard with improved chemical and mechanical properties, e.g. B. fiberboard or hemp panels and glass and rock wool panels.
  • a wood fiber board is used as an example.
  • wood fiber boards for the production of pieces of furniture, door leaves and the like. These consist of pressed wood fiber boards, which usually have a density of 450 to 1000 kg/m 3 after the pressing process.
  • pressed wood fiber boards which usually have a density of 450 to 1000 kg/m 3 after the pressing process.
  • the processing of the wood fiber board is even more complex if a structured surface such as the milling of grooves, cassettes and the like takes place.
  • This method also has the disadvantage that before the wood fiber board is processed, the locations of the processing must be precisely defined. It is not possible to produce a wood fiber board with this method, where the type of processing, such as the grooves and contours actually milled into the board, is only determined later.
  • the object of the invention is to create a method for producing a fiberboard, in particular a hardened wood fiberboard, which can be processed individually, ie in which the processing contours can only be determined at a later point in time.
  • the method according to the invention is discussed in more detail below on the basis of the preferred use of wood fiber boards, the method also being suitable for boards made of other materials which can be treated with liquid hardening agent.
  • liquid hardening material is applied over the entire surface to an upper side of the fiber board.
  • a liquid hardening material consisting essentially of a post-crosslinking polymer is used.
  • 400-800 ml, in particular 500-600 ml liquid of impregnating material per square meter with a panel thickness of 6-10 mm, in particular 7-9 mm, is applied to the upper side of the wood fiber panel. With a smaller panel thickness, relatively less impregnating material is applied. If the panel thickness is reduced by half, the amount of impregnation agent applied is also reduced by 50%.
  • impregnation material of 200-400 ml, in particular 250-300 ml, is applied per square meter.
  • board thickness and thus also increasing desired penetration depth of the impregnating material, correspondingly more impregnating material is applied over the entire surface of the upper side of the fiber board.
  • a pressure difference is generated between the top and bottom of the fiberboard in order to suck and/or press the impregnating material into the wood fiber board over a large area.
  • the required amount of impregnation material can be significantly reduced according to the invention.
  • impregnation material is applied to both upper sides.
  • the plate is turned over in a preferred development of the invention in a next step, so that the previous underside becomes the new upper side and the previous upper side becomes the new underside. Then again material is applied to the now new upper side, the amount of material in turn corresponding to the application amount described above as a function of the panel thickness.
  • the mechanical properties of the panel can be significantly improved.
  • the panel preferably has a density of 700-1100 kg/m 3 , in particular 800-1000 kg/m 3 .
  • a density of 700-1100 kg/m 3 in particular 800-1000 kg/m 3 .
  • the times for which a pressure difference is applied are 70-110 s, in particular 80-100 s, for the first sucking in, i.e. before the plate is turned over , this material is then sucked in or pressed in for 10-25 s, in particular 15-20 s. Despite the impregnation material being sucked in or pressed in from both sides, only a very small amount of material is sucked out of the plate. This amount is negligible.
  • the pressure difference is preferably generated by means of a vacuum chamber extending over the entire underside of the wood fiber board. Both the full-area application and the full-area generation of negative pressure take place essentially over the entire surface of the plate.
  • a post-crosslinking polymer is used as the impregnation material.
  • a two-component material can be used that hardens z.
  • the polyurethane is provided with an isocyanate that reacts with water.
  • the water is the residual moisture content of the MDF board.
  • the reaction time is adjusted to be very long and is preferably about 3 days.
  • the panels can be stacked after treatment and do not stick.
  • the hardening material used preferably has a viscosity of 10 to 80 s measured in a DIN 4 measuring cup.
  • the preferred pressure difference between the top and bottom of the wood fiber board is preferably in the range of 0.8 to 1.2 bar, this being dependent in particular on the air pressure. Since it is particularly preferred that only suction takes place, the maximum pressure difference is in the range of approx. 1 bar, since it is an open system.
  • the provision of only one vacuum chamber on the underside of the wood fiber board has the advantage that an overpressure chamber on the top side of the wood fiber board can be omitted.
  • the differential pressure is generated by at least one vacuum pump, which is connected to the vacuum chamber.
  • the at least one vacuum pump or the plurality of vacuum pumps together have a suction capacity of 700 to 1200 m 3 /h and in particular 800 to 1000 m 3 /h. This suction power refers to an area of 1 m 2 .
  • the impregnation or hardening material is sucked or pressed over a region of at least 3 mm, in particular completely, into the wood fiber board. This is particularly the case when the impregnating material is applied and pressed in or sucked in from both sides.
  • the suction time is between 20 and 90 s.
  • a top side 14 of a wood fiber board 10 produced by a conventional pressing method is sprayed with hardened material in a first station with the aid of a spray device 12 .
  • the spray head 16 which extends over the entire width of the wood fiber board 10 , is moved continuously in the direction of an arrow 18 over the entire length of the wood fiber board 10 .
  • the wood fiber board is transported in the direction of an arrow 22 to the next processing station.
  • the wood fiber board rests on a vacuum chamber 26 formed by a, for example, rectangular frame 24 running along the edge of the wood fiber board 10 .
  • the vacuum chamber 26 is connected to three vacuum pumps 28 .
  • the vacuum pumps 28 generate a pressure of approximately 1000 mbar in the vacuum pump chamber 26 and thus on an underside 25 of the wood fiber board 10 over a period of approximately 90 seconds.
  • the hardened material arranged on the upper side 14 of the wood fiber board 10 is sucked in over the entire surface.
  • the wood fiber board 10 can then be individually processed after the material has hardened. In this way, with very good quality results, an individual profiling and structuring of the surface of the wood fiber board can take place by introducing grooves and the like. Time-consuming, in particular manual, regrinding is no longer necessary before coating the surface with paint or the like.
  • the wood fiber board is turned over on top 14 so that bottom 25 becomes the new top and top 14 becomes the new bottom. This is followed by a complete application of liquid hardening material and a corresponding sucking in or pressing in as described above.
  • sucking in or pressing in takes place over a significantly shorter period of time of in particular 10-25 s, and particularly preferably 15-20 s.

Claims (11)

  1. Procédé de production d'un panneau en fibres, notamment d'un panneau durci en fibres de bois, avec les étapes :
    appliquer une matière d'imprégnation liquide consistant essentiellement en un polymère post-durcissant, sur une surface entière d'une face supérieure (14) d'un panneau en fibres (10),
    400 à 800 ml, notamment 500 à 600 ml, de matière d'imprégnation étant appliquée par mètre carré pour une épaisseur de panneau de 6 à 10 mm, notamment de 7 à 9 mm, ou respectivement
    200 à 400 ml, notamment 250 à 300 ml de matière d'imprégnation étant appliquée par mètre carré pour une épaisseur de panneau de 2 à 6 mm, notamment de 3 à 5 mm, et
    engendrer une différence de pression entre la face supérieure (14) et une face inférieure (25) du panneau en fibres (10) pour aspirer et/ou injecter la matière d'imprégnation dans le panneau en fibres (10).
  2. Procédé selon la revendication 1 avec les étapes supplémentaires :
    retourner le panneau en fibres,
    appliquer un matériau durcisseur liquide sur une surface entière d'une nouvelle face supérieure (25) d'un panneau en fibres (10),
    400 à 800 ml, notamment 500 à 600 ml, de matière d'imprégnation étant appliquée par mètre carré pour une épaisseur de panneau de 6 à 10 mm, notamment de 7 à 9 mm, ou respectivement
    200 à 400 ml, notamment 250 à 300 ml de matière d'imprégnation étant appliquée par mètre carré pour une épaisseur de panneau de 2 à 6 mm, notamment de 3 à 5 mm, et
    engendrer une différence de pression entre la nouvelle face supérieure (25) et la nouvelle face inférieure (14) du panneau en fibres (10) pour aspirer et/ou injecter la matière d'imprégnation dans le panneau en fibres (10).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la densité du panneau en fibres est de 700 à 1100 kg/m3, notamment de 800 à 1000 kg/m3.
  4. Procédé selon l'une des revendications 1 à 3, la différence de pression entre la face supérieure (14) et la face inférieure (15) pour la première aspiration et/ou injection étant appliquée pendant 70 à 110 s, notamment pendant 80 à 100 s.
  5. Procédé selon l'une des revendications 1 à 3, la différence de pression entre la nouvelle face supérieure (25) et la nouvelle face inférieure (14) pour la première aspiration et/ou injection étant appliquée pendant 10 à 25 s, notamment pendant 15 à 20 s.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la génération de la différence de pression est effectuée moyennant une chambre à dépression (26) s'étendant sur la face inférieure (25) entière du panneau en fibres (10).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la matière d'imprégnation est appliquée en la versant et/ou en la vaporisant sur la face supérieure (14).
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la matière a une viscosité de 10 à 80 s, mesurée dans un gobelet d'écoulement DIN 4.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la différence de pression est de 0,8 à 1,2 bar.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que la différence de pression est effectuée par au moins une pompe à vide avec une puissance d'aspiration totale de 700 à 1200 m3/h, notamment de 800 à 1000 m3/h sur une surface de 1 m2.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce que la matière durcisseur pénètre dans le panneau en fibres (10) sur au moins 3 mm, de préférence entièrement.
EP16165123.7A 2015-04-17 2016-04-13 Procede de production d'un panneau en fibres presentant des caracteristiques mecaniques et chimiques ameliorees Active EP3098043B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015206941.9A DE102015206941A1 (de) 2015-04-17 2015-04-17 Verfahren zum Herstellen einer Faserplatte mit verbesserten chemischen und mechanischen Eigenschaften

Publications (2)

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EP3098043A1 EP3098043A1 (fr) 2016-11-30
EP3098043B1 true EP3098043B1 (fr) 2023-06-07

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US (1) US20160303761A1 (fr)
EP (1) EP3098043B1 (fr)
DE (1) DE102015206941A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3844603A4 (fr) 2018-08-30 2022-05-18 Interface, Inc. Impression numérique pour revêtement de sol et structures décoratives
IT201900017324A1 (it) 2019-09-26 2021-03-26 Cefla Deutschland Gmbh Processo per preparare un pannello rinforzato e/o a ritardo di fiamma
IT201900017288A1 (it) 2019-09-26 2021-03-26 Cefla Deutschland Gmbh Processo per preparare bordi di pannelli a prova di acqua, rinforzati e/o a fiamma ritardata

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916960A (en) * 1993-12-21 1999-06-29 The Sherwin-Williams Company Water-based, storage stable, self-curing coating composition
DE19963203A1 (de) 1999-12-27 2001-09-20 Kunnemeyer Hornitex Verfahren zum Herstellen von plattenförmigen Holzwerkstoffen und Platte aus Holzwerkstoff
US6620459B2 (en) * 2001-02-13 2003-09-16 Houston Advanced Research Center Resin-impregnated substrate, method of manufacture and system therefor
US6596063B2 (en) * 2001-05-18 2003-07-22 Markus Rettenbacher Impregnated wood
DE102008049132A1 (de) * 2008-09-26 2010-04-08 Flooring Technologies Ltd. Verfahren zum Herstellen einer Holzfaserplatte und Holzfaserplattenherstellvorrichtung
ES2898213T3 (es) * 2011-01-06 2022-03-04 Flooring Technologies Ltd Procedimiento y dispositivo para la influencia dirigida en las propiedades tecnológicas de zonas individuales de un tablero de material derivado de la madera, de un velo de material derivado de la madera precompactado o de una torta de fibras de madera
DE102012100800B4 (de) * 2012-01-31 2021-08-05 Flooring Technologies Ltd. Verfahren zum Imprägnieren von Werkstoffplatten, imprägnierte Werkstoffplatte und Anlage zur Herstellung einer imprägnierten Werkstoffplatte

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DE102015206941A1 (de) 2016-11-10
EP3098043A1 (fr) 2016-11-30

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