EP1907178A1 - Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques - Google Patents

Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques

Info

Publication number
EP1907178A1
EP1907178A1 EP05763977A EP05763977A EP1907178A1 EP 1907178 A1 EP1907178 A1 EP 1907178A1 EP 05763977 A EP05763977 A EP 05763977A EP 05763977 A EP05763977 A EP 05763977A EP 1907178 A1 EP1907178 A1 EP 1907178A1
Authority
EP
European Patent Office
Prior art keywords
wood
bisulfite
treated
formaldehyde
chips
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
EP05763977A
Other languages
German (de)
English (en)
Other versions
EP1907178B1 (fr
Inventor
Wolfgang Seifert
Erhard Prantz
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.)
Lignum Technologies AG
Original Assignee
Kronospan Technical Co Ltd
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 Kronospan Technical Co Ltd filed Critical Kronospan Technical Co Ltd
Priority to PL05763977T priority Critical patent/PL1907178T3/pl
Publication of EP1907178A1 publication Critical patent/EP1907178A1/fr
Application granted granted Critical
Publication of EP1907178B1 publication Critical patent/EP1907178B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • 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
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N1/006—Pretreatment of moulding material for increasing resistance to swelling by humidity
    • 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

Definitions

  • the invention relates to a method for producing a wood material article with low emission of chemical compounds and a wood-based article, which is obtainable by this method.
  • Wood-based products such as particleboard or fibreboard are made of chips or fiber material and a glue.
  • the glue is applied to the comminuted wood (chips) or the fiber material, and then the obtained, still moist wood-material articles are pressed together at elevated temperatures (hot pressing), whereby the glue hardens.
  • Formaldehyde-containing resins have long been used as hardeners and / or binders in such glues.
  • Wood-based panels are often used inside closed rooms. Therefore, it is important that the chipboard does not emit any interfering (e.g., strong odor compounds) or even damaging compounds.
  • the emitted compounds can originate from the wood itself or from the glue used.
  • the finished articles When using formaldehyde-containing resins in the manufacture of wood-based articles, the finished articles emit amounts of formaldehyde, the amount of which is limited by statutory regulations and voluntary requirements of the industry to extremely low limits
  • This object is achieved by a method for producing a wood material article comprising glued together wood chips or
  • Wood fibers in which the wood is treated with bisulfite prior to gluing Wood fibers in which the wood is treated with bisulfite prior to gluing.
  • improved wood-based articles can be produced which, in particular, show little or no unwanted emission of (volatile) chemical compounds which originate from the wood itself. Furthermore, the bisulfite-treated wood chips or wood fibers show a better reaction with the glue.
  • Wood chips or shavings are given. Subsequently, this mixture is sieved and sifted, whereby impurities such as sand, splinters, stones or metal are removed. Subsequently, this mixture is washed, which in turn impurities such as sand and stones are removed. In the next step The shredded wood is heated and dehydrated. This is preferably done by pressing.
  • the crushed wood thus treated is then subjected to a steam treatment at a pressure of 0.8 to 12 bar in a saturated steam atmosphere.
  • an aqueous solution of a bisulfite salt is additionally fed to the steam atmosphere.
  • the bisulfite salts may be, for example, alkali metal and / or ammonium salts. Preference is given to using sodium and / or ammonium bisulfite salts. It is particularly preferred to use ammonium salts.
  • the amount of bisulfite salt is between 3 and 30 kg, preferably between 3 and 12 kg, per m 3 of plate produced.
  • the treatment time is at least 1.5 minutes and preferably between 3 and 8 minutes. Higher levels of bisulfite require longer treatment times to complete the reaction so that the bisulfite can penetrate the fiber and ensure stable impregnation.
  • the wood is treated with bisulfite prior to the production of wood chips or wood fibers, for example in the digester, in order to be able to carry out the process in a simple manner.
  • Impregnation of the wood fibers with paraffin thus does not affect the effect of the method according to the invention.
  • the wood chips or wood fibers are treated with bisulfite, for example in the refiner, with bisulfite.
  • the method can be carried out particularly efficiently.
  • the treatment of crushed wood with bisulfite is important in order to bind the volatile substances in the comminuted wood and to suppress the formation of new volatile substances.
  • bisulfite treatment for example, the bisulfite
  • Adducts of aldehydes, methyl ketones or ⁇ -keto esters are formed.
  • the ⁇ -sulfite can unfold its bleaching effect and react with the dyes present in the wood so that particularly light wood-based articles can be obtained.
  • the brightness of a plate is an important quality criterion.
  • a treatment time of at least 1.5 minutes with bisulphite ensures that the wood is almost completely decomposed and that subsequent treatment with the impregnating agent against moisture sources is not ineffective.
  • the impregnated pieces of wood are comminuted to wood shavings or wood fibers, glued, dried and pressed. This is done by conventional methods.
  • the glue used for gluing the wood chips or wood fibers is preferably an aminoplast resin. It is particularly preferred that a formaldehyde-containing resin is used. This is preferably selected from the group consisting of urea-formaldehyde resin, melamine-formaldehyde resin, urea-melamine-formaldehyde resin and melamine-urea-phenol-formaldehyde resin. Suitable resins are commercially available as solutions or powders and the preparation and use of suitable resins is also described in the prior art. In particular, urea-formaldehyde resins and urea-melamine-formaldehyde resins which are used in the customary amounts are preferred for the process according to the invention.
  • Particularly advantageous formaldehyde-poor resins are used which have a low molar ratio of formaldehyde to urea.
  • the molar ratio of formaldehyde to urea is advantageously between 0.8: 1 to 1.05: 1.
  • the process according to the invention also has the advantage that in the glue conventional resins without formaldehyde-binding additives which can have negative physical or mechanical influences on the final product can be used.
  • the glue used may additionally contain formaldehyde-binding substances.
  • the glue may comprise further additives such as hardening accelerators, water repellents, inert salts, pH adjusters, stabilizers, fungicides or biocides.
  • the glueing is carried out conveniently, one in which the pressed provided with the glue, endzerkleinerte timber at temperatures of 120 to 250 0 C. Under these conditions, the aminoplast resin hardens rapidly and obtain wood-based articles with good mechanical properties, which are largely insensitive to moisture.
  • Two fiberblocks Sl and Vl were prepared by the above-described method using a formaldehyde-urea resin having a molar ratio of formaldehyde to urea of 1: 1.08, with the only difference that in the manufacture of the fiberboard V1, the comminuted wood was not treated with bisulfite before impregnation.
  • the Treatment of the crushed wood with bisulphite was carried out at a pressure of 8.5 bar, with an amount of bisulphite of 3 kg per m 3 crushed wood and over a period of 3.5 minutes.
  • the pretreatment of the wood is followed by wetting with a known moisture impregnating agent and then the compression.
  • Table 1 shows the perforator values (determined in accordance with DIN EN 120 - wood-based panels - determination of the formaldehyde content) of the two fibreboards S1 and V1.
  • Table 1 show that by treating crushed wood with bisulfite, wood-based articles having extremely low formaldehyde emission are obtained.
  • the fiberboard Sl emitted only extremely small amounts of other chemical compounds.
  • the fiber board Sl was much lighter than the fiber board Vl.

Landscapes

  • 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)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

L'invention concerne un procédé pour produire des articles constitués de matériaux dérivés du bois à faible émission de composés chimiques. A cet effet, le bois utilisé est traité au bisulfite avant le collage. Lorsque l'on utilise dans la colle des résines contenant du formaldéhyde, il est possible d'obtenir, au moyen du procédé selon l'invention, des articles constitués de matériaux dérivés du bois présentant des émissions de formaldéhyde extrêmement faibles et une teinte très claire.
EP05763977.5A 2005-07-27 2005-07-27 Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques Active EP1907178B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05763977T PL1907178T3 (pl) 2005-07-27 2005-07-27 Sposób wytwarzania wyrobu z tworzyw drzewnych o niewielkiej emisji związków chemicznych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/053674 WO2007012350A1 (fr) 2005-07-27 2005-07-27 Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques

Publications (2)

Publication Number Publication Date
EP1907178A1 true EP1907178A1 (fr) 2008-04-09
EP1907178B1 EP1907178B1 (fr) 2016-07-20

Family

ID=35134611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05763977.5A Active EP1907178B1 (fr) 2005-07-27 2005-07-27 Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques

Country Status (10)

Country Link
US (5) US20090145564A1 (fr)
EP (1) EP1907178B1 (fr)
CN (1) CN101351313B (fr)
AU (1) AU2005334999A1 (fr)
CA (1) CA2616336A1 (fr)
ES (1) ES2599909T3 (fr)
LT (1) LT1907178T (fr)
PL (1) PL1907178T3 (fr)
PT (1) PT1907178T (fr)
WO (1) WO2007012350A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057208A1 (de) 2009-11-27 2011-06-01 Technische Universität Dresden Verfahren zur Herstellung von lignozellulosen Papierfaserstoffen sowie daraus gewonnene Papiere, Kartone und Pappen
EP3620282A1 (fr) 2017-04-25 2020-03-11 SWISS KRONO Tec AG Procédé de fabrication de panneaux en matériaux dérivés du bois osb à faible émission de composés organiques volatils (cov)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038041A1 (de) * 2007-08-10 2009-02-12 Kronotec Ag Verfahren zur Vermeidung der Emission von Aldehyden und flüchtigen organischen Verbindungen aus Holzwerkstoffen
DE102007055415C5 (de) 2007-11-19 2018-11-29 SWISS KRONO Tec AG Verfahren zur Verminderung der Emission von gesättigten und ungesättigten Aldehyden aus Holzwerkstoffen
PT2193899T (pt) * 2008-12-05 2017-12-18 SWISS KRONO Tec AG Processo para produção de materiais à base de madeira a partir de produtos fragmentados contendo lignocelulose e materiais à base de madeira semelhantes
EP2546039B1 (fr) 2009-07-06 2014-03-26 Kronotec AG Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB
ES2702649T3 (es) 2015-09-24 2019-03-04 SWISS KRONO Tec AG Procedimiento para reducir la emisión de compuestos orgánicos volátiles procedentes de derivados de la madera y derivados de la madera
AT518800B1 (de) 2016-06-17 2019-09-15 Andritz Ag Maschf Verfahren zur herstellung von faserstoff
CN109514685A (zh) * 2018-12-12 2019-03-26 大亚木业（茂名）有限公司 一种低密度纤维板的生产工艺

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US3790417A (en) * 1971-12-17 1974-02-05 A Paterson Process for preparing fiberboard having improved dimensional stability
US3950472A (en) * 1975-02-26 1976-04-13 Continental Can Company, Inc. Molding wood articles from ammonium salt-wood particle mixtures
US4186242A (en) * 1976-03-08 1980-01-29 Georgia-Pacific Corporation Preparation of a lignocellulosic composite
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US4409375A (en) * 1982-02-11 1983-10-11 Champion International Corporation Method for scavenging aldehydes
DE3427694A1 (de) * 1984-07-27 1986-02-06 Basf Ag, 6700 Ludwigshafen Formaldehyd bindendes mittel, dessen verwendung bei der herstellung von spanholzwerkstoffen sowie ein verfahren zur herstellung von spanholzwerkstoffen mit verringerter formaldehydemission
SE470330B (sv) * 1992-06-11 1994-01-24 Sunds Defibrator Ind Ab Förfarande för framställning av fiberboard enligt torra metoden
JPH0919906A (ja) 1995-07-06 1997-01-21 New Oji Paper Co Ltd 木質繊維板の製造方法
US5578371A (en) * 1995-08-25 1996-11-26 Schuller International, Inc. Phenol/formaldehyde fiberglass binder compositions exhibiting reduced emissions
JPH10119010A (ja) 1996-10-22 1998-05-12 Mitsui Chem Inc 木質繊維板およびその製造方法
DE19733925A1 (de) * 1997-08-06 1999-02-11 Bakelite Ag Bindemittelzusammensetzung, ihre Verwendung sowie ein Verfahren zur Herstellung von Spanplatten
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EP1368168B1 (fr) * 2001-03-12 2008-10-01 Akzo Nobel Coatings International B.V. Procede permettant de reduire les emissions de formaldehyde issues de produits dotes d'une couche chargee de formaldehyde
DE10160316A1 (de) * 2001-12-07 2003-06-26 Ihd Inst Fuer Holztechnologie Verfahren zur Herstellung von Faserplatten mit erhöhter Feuchtebeständigkeit nach dem Trockenverfahren
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057208A1 (de) 2009-11-27 2011-06-01 Technische Universität Dresden Verfahren zur Herstellung von lignozellulosen Papierfaserstoffen sowie daraus gewonnene Papiere, Kartone und Pappen
WO2011063800A2 (fr) 2009-11-27 2011-06-03 Technische Universität Dresden Procédé de fabrication de fibres de papier lignocellulosiques, papiers, cartons et cartons-pâtes à base de ces fibres
EP3620282A1 (fr) 2017-04-25 2020-03-11 SWISS KRONO Tec AG Procédé de fabrication de panneaux en matériaux dérivés du bois osb à faible émission de composés organiques volatils (cov)
RU2728871C1 (ru) * 2017-04-25 2020-07-31 СВИСС КРОНО Тек АГ Способ изготовления плит osb на основе древесины со сниженным выделением летучих органических соединений (voc)

Also Published As

Publication number Publication date
AU2005334999A1 (en) 2007-02-01
US20090145564A1 (en) 2009-06-11
US20120077908A1 (en) 2012-03-29
EP1907178B1 (fr) 2016-07-20
WO2007012350A1 (fr) 2007-02-01
US20170210028A1 (en) 2017-07-27
US20160311130A1 (en) 2016-10-27
PT1907178T (pt) 2016-09-30
CA2616336A1 (fr) 2007-02-01
ES2599909T3 (es) 2017-02-06
US20180243939A1 (en) 2018-08-30
CN101351313A (zh) 2009-01-21
PL1907178T3 (pl) 2017-01-31
CN101351313B (zh) 2011-06-01
LT1907178T (lt) 2016-11-10

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