EP2168738A1 - Procédé de fabrication d'une plaque en fibres de bois et dispositif de fabrication de plaques en fibres de bois - Google Patents

Procédé de fabrication d'une plaque en fibres de bois et dispositif de fabrication de plaques en fibres de bois Download PDF

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Publication number
EP2168738A1
EP2168738A1 EP09012140A EP09012140A EP2168738A1 EP 2168738 A1 EP2168738 A1 EP 2168738A1 EP 09012140 A EP09012140 A EP 09012140A EP 09012140 A EP09012140 A EP 09012140A EP 2168738 A1 EP2168738 A1 EP 2168738A1
Authority
EP
European Patent Office
Prior art keywords
wood fiber
raw
fiber board
aqueous liquid
fiberboard
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
EP09012140A
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German (de)
English (en)
Other versions
EP2168738B1 (fr
Inventor
Norbert Kalwa
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.)
Flooring Technologies Ltd
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Flooring Technologies Ltd
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Publication date
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to PL09012140T priority Critical patent/PL2168738T3/pl
Publication of EP2168738A1 publication Critical patent/EP2168738A1/fr
Application granted granted Critical
Publication of EP2168738B1 publication Critical patent/EP2168738B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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
    • B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
    • 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

Definitions

  • the invention relates to a method for producing a fiberboard. According to a second aspect, the invention relates to a Holzmaschineplattenherstellvorraum and a wood fiber board.
  • MDF medium-density fiberboard
  • fibreboards are combined in a variety of applications with other materials, such as wood. It may be due to different moisture and / or moisture changes in the materials to default.
  • the raw wood fiber boards leave the press in this process with lowered, but still relatively high temperature, so that there is behind the press to moisture loss by evaporation or evaporation. These moisture losses behind the press are also not evenly distributed over the raw wood fiber board and the raw wood fiber board then has undesirable moisture gradients.
  • the invention has for its object to overcome disadvantages in the prior art, in which the thickness of the wood-based panel defined increases and also their emission of formaldehyde and / or volatile organic compounds (VOC) is reduced.
  • the invention solves the problem by a method for producing a fiberboard comprising the steps of (a) pressing a fibrous web into a raw fiberboard, (b) applying an aqueous liquid to at least portions of a first side of the raw fiberboard and (c) applying a fibrous web Underpressure at least on parts of a second side opposite the first side, so that the aqueous liquid is drawn in / or through the raw fiberboard.
  • the invention solves the problem by a wood fiber plate manufacturing apparatus comprising (a) an applicator adapted to apply an aqueous liquid to at least portions of a first side of the green fiberboard and (b) a suction device to apply a negative pressure to at least portions one of the first side opposite second side, so that the aqueous liquid is pressed into or through the wood fiber plate.
  • the invention solves the problem by a wood fiber board, which is produced by a method according to the invention.
  • An advantage of the invention is that the moisture in the raw fiberboard can be adjusted as desired. Delays in the subsequent use of wood fiber board are thus largely excluded.
  • the press can also be operated with fibers of optimum humidity for the press. This increases the productivity of the press and increases the quality of the wood-based panel.
  • the raw wood fiber board can be moistened exactly at the places where the moisture is not sufficient.
  • some parts of the raw wood fiber board for example later edges of the wood fiber board, are provided with an impregnating agent.
  • a high moisture content in these areas would be a hindrance if such impregnation liquids are hydrophobic and a high humidity hinders the wetting with the impregnating agent.
  • the invention exactly the area can be moistened, which is not impregnated.
  • the introduction of the aqueous liquid cools the raw wood fiber board. Therefore, if the aqueous liquid is applied directly behind the press, then otherwise usual waiting time for cooling the raw wood fiber board is eliminated.
  • the moisture content of the finished wood fiber board is also from the weather, such as a fluctuating ambient temperature or a fluctuating ambient humidity, independent, so that always a reproducible result is obtained.
  • the plate is less vulnerable.
  • the invention can be implemented with technically simple means and enables high process reliability. If at least a portion of the aqueous liquid is drawn through the raw fiberboard, it is also possible to expel any pollutants present, such as formaldehyde.
  • the object is understood by the raw wood fiber board, which is obtained by the hot pressing of the nonwoven fabric. After pressing and / or squeezing the aqueous liquid is then spoken of the finished wood fiber board. As a rule, further process steps are carried out before completion of the wood fiber boards, such as, for example, grinding, impregnation, cutting, coating and profiling of the edges.
  • the aqueous liquid is applied, is meant any process step which brings the aqueous liquid in the vicinity of the raw fiberboard so that it can be sucked into or through the raw fiberboard.
  • the application may be spraying, rinsing, vapor deposition, brushing, rolling or the like.
  • the aqueous liquid is understood in particular to mean any water-based liquid whose predominant part consists of water, the aqueous liquid in particular being able to consist essentially completely of water.
  • the aqueous liquid contains biocidal substances, but this is not necessary and must not be desirable.
  • the aqueous liquid preferably has a content of biocides which is zero or so small that the biocidal effect in the finished fiberboard panel caused by the penetration or squeezing of the aqueous liquid is negligible.
  • the aqueous liquid is preferably crosslinker-free. Because impregnation is expensive and desired only in the peripheral areas, the aqueous liquid is usually also impregnation-free. Usually, therefore, the aqueous liquid will consist of more than 95%, in particular more than 97%, of water.
  • the negative pressure In order for the application of the negative pressure to cause the applied aqueous liquid to be sucked into or through the raw fiberboard as efficiently as possible, it is particularly favorable if the negative pressure is applied exactly on the opposite side of the surface to which the aqueous liquid is applied , In particular, the negative pressure is applied there and only there.
  • the application of the aqueous liquid and the application of the negative pressure take place immediately after the pressing of the fibrous web to the raw fiberboard. This advantageously ensures that the raw wood fiber board is cooled, so that they can be further processed faster.
  • a predetermined amount of liquid of the aqueous liquid is applied, which is determined so that the fiberboard has a predetermined final humidity after an end of the application of the negative pressure.
  • the predetermined amount of liquid is chosen so that the final moisture after performing the method is two to five percentage points above that which has the raw wood fiber board immediately behind the press for pressing the nonwoven fabric.
  • the method is particularly advantageous if the raw fiberboard is bound by means of formaldehyde-containing glue, in particular urea-formaldehyde glue, and for each section of the raw fiberboard the application of the aqueous liquid and the application of the reduced pressure last less than one minute. In this way, it is ensured that on the one hand any existing excess formaldehyde and / or eroded from the wood fiber board earth. This advantageously ensures that the finished wood fiber board has a lower emission.
  • formaldehyde-containing glue in particular urea-formaldehyde glue
  • the aqueous liquid contains a surfactant.
  • the concentration is less than 1 wt .-%, in particular less than 0.5 wt .-%. Particularly suitable are 0.1% by weight of surfactant.
  • the raw fiberboard is bound by means of formaldehyde-containing glue and the process is carried out until the free formaldehyde and / or VOC is at least partially removed.
  • the process is carried out until more than half of the free formaldehyde and / or the VOC has been removed.
  • Particularly suitable is the method when the wood fiber board is an MDF or an HDF board.
  • the process is particularly economical if it is carried out continuously. This may mean, for example, that the raw fiberboard is moved during the application of the aqueous liquid or the application of the negative pressure.
  • the method according to the invention preferably also comprises the steps of grinding and / or cutting and / or painting, so that a finished wood fiber board is obtained.
  • the application of the aqueous liquid takes place at least on parts of the first side of the raw wood fiber board so that a resulting change in thickness of the raw wood fiber board is substantially uniform.
  • the change in thickness in percent in the maximum percentile is less than 25% greater than the change in thickness in percent in the minimum percentile based on the width of the raw fiberboard.
  • the application device for the wood fiber board production device is understood in particular to be any device which is designed and arranged to dispense the aqueous liquid.
  • Also known Holzmaschineplattenherstellvorraumen have, for example, spray heads with which impregnating agent can be sprayed. However, these are arranged so that they only spray the edges and / or spray a non-aqueous liquid.
  • the application device comprises a spraying device.
  • the applicator device preferably further comprises a bearing device filled with the aqueous liquid and in contact with the applicator or communicable with or connected to, for example, by switching a valve.
  • the application device comprises more than one spray head.
  • the suction device is designed to form a suction chamber, which extends substantially over the full width of the wood fiber board, with a fiber board placed on the suction device.
  • the suction device has support webs arranged in the suction space for supporting the fibreboard.
  • support devices are provided in the suction chamber, which reduce bending of the wood fiber board.
  • FIG. 1 shows a portion of a wood fiber board manufacturing apparatus with an applicator 10 and a suction device 12, which includes a suction table 14.
  • the suction table 14 has support webs 16.1, 16.2,..., Which are arranged in a suction chamber 18 and are designed to support a raw fiberboard 20.
  • the suction chamber 18 is connected to a suction line 22, which leads to a vacuum pump, not shown, via which a suction chamber pressure p s of, for example, 200 mbar can be applied in the suction chamber 18.
  • a seal 24 is provided between the marginal support web 16.1 and the raw fiberboard 20, so that the vacuum in the suction chamber 18 can be easily maintained.
  • the application device 10 comprises a spraying device 26 which is movable in a direction of movement R guided by a non-illustrated drive.
  • the sprayer 26 comprises a plurality of spray nozzles, of which FIG. 1 only the spray nozzle 28 can be seen.
  • the spraying device 26 extends across the full width of the raw fiberboard 20, which in FIG. 1 protrudes from the plane of the drawing.
  • the suction device 12 is designed so that it can also create a vacuum substantially over the full width of the raw fiberboard 20.
  • the spraying device 26 sprays aqueous liquid 30 originating from a corresponding storage container onto a surface 32 of the raw fiberboard 20. Due to the negative pressure p s in the suction chamber 18, the aqueous liquid 30 is pressed by the surrounding air through the raw fiberboard 20, so that an area 34 of increased humidity in the raw fiberboard 20 forms.
  • the raw wood fiber board 20 is sprayed along a later edge with an impregnating agent, which is also introduced by applying a negative pressure in the raw wood fiber board 20.
  • the raw wood fiber board 20 is ground and finally cut, so that a finished wood fiber board is formed.
  • the cut is made through the areas that have been provided with impregnating agent.
EP20090012140 2008-09-26 2009-09-24 Procédé de fabrication d'une plaque en fibres de bois Active EP2168738B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09012140T PL2168738T3 (pl) 2008-09-26 2009-09-24 Sposób wytwarzania płyty pilśniowej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008049132A DE102008049132A1 (de) 2008-09-26 2008-09-26 Verfahren zum Herstellen einer Holzfaserplatte und Holzfaserplattenherstellvorrichtung

Publications (2)

Publication Number Publication Date
EP2168738A1 true EP2168738A1 (fr) 2010-03-31
EP2168738B1 EP2168738B1 (fr) 2015-04-29

Family

ID=41349451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090012140 Active EP2168738B1 (fr) 2008-09-26 2009-09-24 Procédé de fabrication d'une plaque en fibres de bois

Country Status (4)

Country Link
EP (1) EP2168738B1 (fr)
DE (1) DE102008049132A1 (fr)
ES (1) ES2541140T3 (fr)
PL (1) PL2168738T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2586145C2 (ru) * 2011-01-06 2016-06-10 Флоринг Текнолоджиз Лтд. Способ и устройство для специфического воздействия на технологические свойства отдельных областей листового материала, предварительно уплотненного материала в виде нетканого полотна или материала в виде волокнистой массы
EP3059056A1 (fr) 2015-02-23 2016-08-24 Basf Se Procédé de fabrication de fibres de bois et panneaux en fibres de bois
US20160303761A1 (en) * 2015-04-17 2016-10-20 Cefla Deutschland Gmbh Method for Producing a Fiber Board Having Improved Chemical and Mechanical Properties
WO2019162145A1 (fr) 2018-02-20 2019-08-29 Basf Se Procédé de fabrication de panneaux de fibres de bois
EP4166294A1 (fr) * 2021-10-18 2023-04-19 SWISS KRONO Tec AG Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
PL3059020T3 (pl) 2015-02-23 2017-10-31 Flooring Technologies Ltd Sposób wytwarzania płyty z tworzywa drzewnego, zwłaszcza płyty z tworzywa drzewnego z warstwą wzoru

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473514A (en) * 1964-09-24 1969-10-21 Casco Ab Device for applying liquid to a porous product
JPS585247A (ja) 1981-07-01 1983-01-12 Eidai Co Ltd パ−テイクルボ−ドの含水率調整方法
JPH06293009A (ja) 1992-01-31 1994-10-21 Noda Corp 繊維板の製造方法
WO2000044985A1 (fr) 1999-02-01 2000-08-03 Valmet Fibertech Ab Procede et dispositif de fabrication de planches lignocellulosiques
DE10036566A1 (de) * 2000-07-27 2002-02-07 Baur Gaebel Gmbh Imprägniermittel für Holz
US6599456B1 (en) 1999-10-14 2003-07-29 Maschinenfabrik J. Dieffenbacher Gmbh & Co Method and apparatus for the continuous and discontinuous production of boards of ligneous material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6505012A (fr) * 1964-09-24 1966-04-25
DE102007039267B4 (de) * 2007-08-20 2013-04-04 Kronotec Ag Verfahren zur Herstellung von leitfähigen Holzwerkstoffplatten und solche Holzwerkstoffplatten

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473514A (en) * 1964-09-24 1969-10-21 Casco Ab Device for applying liquid to a porous product
JPS585247A (ja) 1981-07-01 1983-01-12 Eidai Co Ltd パ−テイクルボ−ドの含水率調整方法
JPH06293009A (ja) 1992-01-31 1994-10-21 Noda Corp 繊維板の製造方法
WO2000044985A1 (fr) 1999-02-01 2000-08-03 Valmet Fibertech Ab Procede et dispositif de fabrication de planches lignocellulosiques
US6599456B1 (en) 1999-10-14 2003-07-29 Maschinenfabrik J. Dieffenbacher Gmbh & Co Method and apparatus for the continuous and discontinuous production of boards of ligneous material
DE10036566A1 (de) * 2000-07-27 2002-02-07 Baur Gaebel Gmbh Imprägniermittel für Holz

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2586145C2 (ru) * 2011-01-06 2016-06-10 Флоринг Текнолоджиз Лтд. Способ и устройство для специфического воздействия на технологические свойства отдельных областей листового материала, предварительно уплотненного материала в виде нетканого полотна или материала в виде волокнистой массы
EP3184272A3 (fr) * 2011-01-06 2017-08-09 Flooring Technologies Ltd. Procédé et dispositif d'influence ciblée des caractéristiques technologiques de domaines individuels d'une plaque en matière dérivée du bois, d'un tissu en matière dérivée du bois pré-étanchéifié ou d'un gâteau en fibres de bois
EP3693144A1 (fr) * 2011-01-06 2020-08-12 Flooring Technologies Ltd. Procédé et dispositif de traitement partiel de la surface ou de la coupe transversale complète d'une plaque en matériau dérivé du bois ou d'un non-tissé en matériau dérivé du bois précomprimé ou d'un gâteau en fibre de bois
EP3059056A1 (fr) 2015-02-23 2016-08-24 Basf Se Procédé de fabrication de fibres de bois et panneaux en fibres de bois
US20160303761A1 (en) * 2015-04-17 2016-10-20 Cefla Deutschland Gmbh Method for Producing a Fiber Board Having Improved Chemical and Mechanical Properties
EP3098043A1 (fr) * 2015-04-17 2016-11-30 Cefla Deutschland GmbH Procede de production d'un panneau en fibres presentant des caracteristiques mecaniques et chimiques ameliorees
WO2019162145A1 (fr) 2018-02-20 2019-08-29 Basf Se Procédé de fabrication de panneaux de fibres de bois
EP4166294A1 (fr) * 2021-10-18 2023-04-19 SWISS KRONO Tec AG Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois
WO2023066802A1 (fr) 2021-10-18 2023-04-27 SWISS KRONO Tec AG Procédé de fabrication d'un panneau en matériau dérivé du bois et dispositif de fabrication de panneaux en matériau dérivé du bois

Also Published As

Publication number Publication date
EP2168738B1 (fr) 2015-04-29
DE102008049132A1 (de) 2010-04-08
ES2541140T3 (es) 2015-07-16
PL2168738T3 (pl) 2015-09-30

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