EP1907178B1 - 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 Download PDFInfo
- Publication number
- EP1907178B1 EP1907178B1 EP05763977.5A EP05763977A EP1907178B1 EP 1907178 B1 EP1907178 B1 EP 1907178B1 EP 05763977 A EP05763977 A EP 05763977A EP 1907178 B1 EP1907178 B1 EP 1907178B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- bisulfite
- formaldehyde
- treated
- urea
- 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.)
- Expired - Lifetime
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-based article with low emission of chemical compounds.
- 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 clamping plates do 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 publication JP 9019906 describes a process for producing a wood-based article according to the preamble of claim 1, wherein wood fibers glued together are treated with bisulfite prior to gluing.
- the aim is to provide a fiberboard that has a strong bond strength and that can be made with a reduced amount of resin.
- the publication JP 10119010 also describes a process for producing a wood-based article, in which the wood is treated with bisulfite prior to gluing.
- 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-based material article according to Ansprunch 1 solved.
- 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.
- the thus treated crushed wood is then subjected to a steam treatment at a pressure of 6 to 12 bar in a saturated steam atmosphere.
- an aqueous solution of a bisulfite salt may be supplied to the vapor 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 1 and 30 kg, preferably between 3 and 12 kg, per m 3 of plate produced.
- the duration of treatment is according to the invention 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 the wood chips or wood fibers, for example in the digester, in order to be able to carry out the process in a simple manner.
- a subsequent impregnation of the wood fibers with paraffin thus does not impair 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 can be formed.
- the bisulfite can develop its bleaching effect and react with the dyes present in the wood so that particularly bright 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 dry 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 gluing is conveniently carried out by compressing the end-comminuted wood provided with the glue at temperatures of 120 to 250 ° C. Under these conditions, the aminoplast resin cures rapidly, resulting in wood-based articles with good mechanical properties, which are largely insensitive to moisture.
- Two fiberboards S1 and V1 were made 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 production of the fiberboard V1, the crushed 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 according to DIN EN 120 - wood-based materials - determination of the formaldehyde content) of the two fibreboards S1 and V1 .
- Table 1 fibreboard Perforator values in mg HCHO / 100g fibreboard S1 2.5 V1 6.5
- Table 1 show that by treating crushed wood with bisulfite, wood-based articles having extremely low formaldehyde emission are obtained.
- the fiberboard S1 emitted only extremely small amounts of other chemical compounds.
- the fiber board S1 was much brighter than the fiber board V1.
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)
Claims (7)
- Procédé de fabrication d'un article en matériau à base de bois comprenant des copeaux de bois ou des fibres de bois collés entre eux, caractérisé en ce que, avant l'encollage, le bois est traité avec du bisulfite à une pression de 6 à 12 bar dans une atmosphère de vapeur d'eau saturée ou dans de l'air saturé de vapeur d'eau pendant une durée de 3 à 8 minutes.
- Procédé selon la revendication 1, le bois étant traité avec du bisulfite, par exemple dans un autoclave, avant la fabrication des copeaux de bois ou des fibres de bois.
- Procédé selon la revendication 1, les copeaux de bois ou des fibres de bois étant traités avec du bisulfite, par exemple dans un raffineur.
- Procédé selon une des revendications précédentes, le bisulfite étant ajouté dans une proportion de 1 à 30 kg par m3 de bois, de préférence dans une proportion de 3 à 12 kg par m3 de bois.
- Procédé selon une des revendications précédentes, le bisulfite étant choisi entre le bisulfite de sodium et le bisulfite d'ammonium.
- Procédé selon une des revendications précédentes, le bois traité avec du bisulfite étant transformé en copeaux de bois ou en fibres de bois et les copeaux de bois ou les fibres de bois étant encollés avec une résine aminoplaste.
- Procédé selon la revendication 1, les copeaux de bois ou les fibres de bois étant encollés avec une résine aminoplaste qui est choisie dans le groupe constitué de la résine urée-formaldéhyde, de la résine mélamine-formaldéhyde, de la résine urée-mélamine-formaldéhyde et de la résine mélamine-urée-phénol-formaldéhyde.
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 EP1907178A1 (fr) | 2008-04-09 |
| EP1907178B1 true EP1907178B1 (fr) | 2016-07-20 |
Family
ID=35134611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05763977.5A Expired - Lifetime 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3395520A1 (fr) | 2017-04-25 | 2018-10-31 | SWISS KRONO Tec AG | Procédé de fabrication de panneaux de lamelles orientées osb à faible émission sur des composés organiques volatils (cov) |
Families Citing this family (8)
| 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 |
| HUE035745T2 (hu) * | 2008-12-05 | 2018-05-28 | SWISS KRONO Tec AG | Eljárás fa-szerkezeti anyagok lignocellulóz tartalmú aprított termékekbõl történõ elõállítására, valamint ilyen fa-szerkezeti anyagok |
| ES2611080T3 (es) | 2009-07-06 | 2017-05-04 | SWISS KRONO Tec AG | Procedimiento para reducir la emisión de aldehídos y compuestos orgánicos volátiles de materiales a base de madera |
| DE102009057208A1 (de) | 2009-11-27 | 2011-06-01 | Technische Universität Dresden | Verfahren zur Herstellung von lignozellulosen Papierfaserstoffen sowie daraus gewonnene Papiere, Kartone und Pappen |
| PT3147093T (pt) | 2015-09-24 | 2019-01-17 | SWISS KRONO Tec AG | Processo para a redução da emissão de compostos orgânicos voláteis de materiais derivados da madeira e materiais derivados da madeira |
| 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 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3597310A (en) * | 1966-04-25 | 1971-08-03 | Kokusaku Pulp Ind Co Ltd | Method of producing high yield pulp by disc refining at ph of 12 to 14 |
| US3607618A (en) * | 1967-11-06 | 1971-09-21 | Process Dev Corp | Wood-pulping process |
| 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 |
| DD125281A1 (fr) * | 1976-04-15 | 1977-04-13 | ||
| 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 |
| DE19949332A1 (de) * | 1999-10-13 | 2001-05-23 | Clariant Gmbh | Verfärbungsarme Dispersionsklebstoffe mit verlängerter Topfzeit |
| EE200300376A (et) * | 2001-03-12 | 2003-10-15 | Akzo Nobel N.V. | Meetod formaldehüüdi emissiooni vähendamiseks formaldehüüdi sisaldavatest kihilistest toodetest, puitplaat, spoon, põrandamaterjal ja vesilahus |
| DE10160316A1 (de) * | 2001-12-07 | 2003-06-26 | Ihd Inst Fuer Holztechnologie | Verfahren zur Herstellung von Faserplatten mit erhöhter Feuchtebeständigkeit nach dem Trockenverfahren |
| US20050048272A1 (en) * | 2003-08-26 | 2005-03-03 | Miele Philip Francis | Low emission fibrous webs and method of such webs |
-
2005
- 2005-07-27 AU AU2005334999A patent/AU2005334999A1/en not_active Abandoned
- 2005-07-27 EP EP05763977.5A patent/EP1907178B1/fr not_active Expired - Lifetime
- 2005-07-27 ES ES05763977.5T patent/ES2599909T3/es not_active Expired - Lifetime
- 2005-07-27 PL PL05763977T patent/PL1907178T3/pl unknown
- 2005-07-27 WO PCT/EP2005/053674 patent/WO2007012350A1/fr not_active Ceased
- 2005-07-27 CN CN2005800516974A patent/CN101351313B/zh not_active Expired - Lifetime
- 2005-07-27 US US11/989,415 patent/US20090145564A1/en not_active Abandoned
- 2005-07-27 PT PT57639775T patent/PT1907178T/pt unknown
- 2005-07-27 CA CA002616336A patent/CA2616336A1/fr not_active Abandoned
- 2005-07-27 LT LTEP05763977.5T patent/LT1907178T/lt unknown
-
2011
- 2011-12-06 US US13/312,469 patent/US20120077908A1/en not_active Abandoned
-
2016
- 2016-07-05 US US15/202,097 patent/US20160311130A1/en not_active Abandoned
-
2017
- 2017-04-06 US US15/480,964 patent/US20170210028A1/en not_active Abandoned
-
2018
- 2018-04-25 US US15/962,793 patent/US20180243939A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3395520A1 (fr) | 2017-04-25 | 2018-10-31 | SWISS KRONO Tec AG | Procédé de fabrication de panneaux de lamelles orientées osb à faible émission sur des composés organiques volatils (cov) |
| WO2018197094A1 (fr) | 2017-04-25 | 2018-11-01 | SWISS KRONO Tec AG | Procédé pour la fabrication de panneaux en matériau dérivé du bois osb présentant une émission réduite de composés organiques volatils (cov) |
| US11007668B2 (en) | 2017-04-25 | 2021-05-18 | SWISS KRONO Tec AG | Process for the production of OSB wood-based boards with reduced emission of volatile organic compounds (VOCs) |
| US11904496B2 (en) | 2017-04-25 | 2024-02-20 | SWISS KRONO Tec AG | Process for the production of OSB wood-based boards with reduced emission of volatile organic compounds (VOCs) |
Also Published As
| Publication number | Publication date |
|---|---|
| US20180243939A1 (en) | 2018-08-30 |
| LT1907178T (lt) | 2016-11-10 |
| US20090145564A1 (en) | 2009-06-11 |
| PL1907178T3 (pl) | 2017-01-31 |
| CA2616336A1 (fr) | 2007-02-01 |
| EP1907178A1 (fr) | 2008-04-09 |
| US20170210028A1 (en) | 2017-07-27 |
| US20120077908A1 (en) | 2012-03-29 |
| AU2005334999A1 (en) | 2007-02-01 |
| WO2007012350A1 (fr) | 2007-02-01 |
| ES2599909T3 (es) | 2017-02-06 |
| CN101351313B (zh) | 2011-06-01 |
| US20160311130A1 (en) | 2016-10-27 |
| PT1907178T (pt) | 2016-09-30 |
| CN101351313A (zh) | 2009-01-21 |
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