EP0639434B2 - Verfahren zur Herstellung von mitteldichten Holzfaserplatten (MDF) - Google Patents
Verfahren zur Herstellung von mitteldichten Holzfaserplatten (MDF) Download PDFInfo
- Publication number
- EP0639434B2 EP0639434B2 EP19940111375 EP94111375A EP0639434B2 EP 0639434 B2 EP0639434 B2 EP 0639434B2 EP 19940111375 EP19940111375 EP 19940111375 EP 94111375 A EP94111375 A EP 94111375A EP 0639434 B2 EP0639434 B2 EP 0639434B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- digested
- resin
- mdf
- fibers
- 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
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- 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
Definitions
- the invention relates to a method for producing medium-density fibreboard according to the preamble of the main claim.
- the wood is first cut into a schnitzel with a Size of about 20 mm x 5 mm crushed and the resulting wood chips washed to remove the adhering foreign matter (especially sand). Then the schnitzel is steamed for a few minutes and one Treated temperature of about 160 ° C and then fed to a defibrator, where it is frayed into single fibers or small tufts of fibers between grinding disks become.
- the fiber becomes a binder such as urea-formaldehyde resin (UF resin), mixed resin made of urea and melamine (MUF resin), Phenol formaldehyde resin (PF resin), tannin formaldehyde resin (TF resin) or diisocyanate adhesive HPMDI added.
- UF resin urea-formaldehyde resin
- MAF resin mixed resin made of urea and melamine
- PF resin Phenol formaldehyde resin
- TF resin tannin formaldehyde resin
- HPMDI diisocyanate adhesive
- the binder can also be added to the fibers after drying.
- the fibers run through a special glue application drum.
- the dried and glued pulp is fed to a molding machine where it is sprinkled on a sieve that moves at high speed.
- the mats formed in this way are then pressed into sheets.
- the older but not prepublished EP-B-0 647 174 describes a process for the production of medium-density wood fiber boards in which wood fibers provided with urea-formaldehyde resin as binders are formed into fiber mats and pressed into boards at elevated temperature.
- the wood or the wood chips are chemically digested for the production of the fibers, Na 2 SO 3 and / or NaHSO 3 being used as the disintegrating agent.
- the fibers thus produced are fed to the further process without being washed out.
- the pH value of the impregnation solution is kept between 2 and 12 and can advantageously be controlled by NaOH.
- the object of the present invention is to provide a simple method which makes it possible to reduce the formaldehyde release of the MDF produced, without having to treat the plates afterwards.
- the fibers are glued in a manner known per se with one of the binders mentioned, scattered into mats and pressed into sheets. It has surprisingly been found that such MDFs have a relatively low release of formaldehyde and that, moreover, the boards produced by this process have better mechanical-technological properties than the boards which are made from fibers which have undergone thermomechanical refiner digestion (TMP). Procedure) are open-minded.
- the CTMP process known per se is a process for producing wood materials from wood chips or other wood comminution products. In the production of CTMP (chemo-thermo-mechanical pulps), the wood chips are impregnated with chemicals such as Na 2 SO 3 under and without the addition of NaOH at high temperatures (140 ° C ... 170 ° C) and then fiberized at high temperatures , The fibers obtained are used on their own or in combination with other fibers (e.g. waste paper) for the production of newsprint and other types of paper (e.g. tissue paper).
- CTMP thermomechanical refiner digestion
- the binders used in the process according to the invention are those known in the manufacture of MDF (medium density fiberboard) Binders such as urea-melamine resin (MUF), phenol formaldehyde resin (PF resin), Tannin formaldehyde resin (TF resin) or an adhesive based on polymers Diisocyanates (PMDI) used.
- MDF medium density fiberboard
- Binders such as urea-melamine resin (MUF), phenol formaldehyde resin (PF resin), Tannin formaldehyde resin (TF resin) or an adhesive based on polymers Diisocyanates (PMDI) used.
- the method according to the invention is also suitable for the use of hardwoods.
- the wood or the wood chips are digested with chemicals such as Na 2 SO 3 or with NaOH.
- the wood is digested with a mixture of Na 2 SO 3 and NaOH.
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)
Description
Claims (6)
- Verfahren zur Herstellung von mitteldichten Holzfaserplatten, bei dem mit Bindemittel versehene Holzfasern zu Fasermatten geformt und bei erhöhter Temperatur zu Platten gepresst werden, dadurch gekennzeichnet, dass für die Herstellung der Fasern das Holz bzw. die Hackschnitzel nach dem CTMP-Verfahren (chemo-thermo-mechanical-pulping) aufgeschlossen werden, und die hergestellten Fasern, ohne ausgewaschen zu werden, dem weiteren Verfahren zugeführt werden, wobei als Bindemittel ein Harnstoff-Melamin-Harz (MUF) oder ein Tanninformaldehydharz (TF-Harz) oder ein Phenolformaldehydharz (PF-Harz) oder ein Klebstoff auf Basis von polymeren Diisocyanaten (PMDI) verwendet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das aufzuschließende Holz ein Nadelholz ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das aufzuschließende Holz ein Laubholz ist.
- Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Holz mit Na2SO3 allein aufgeschlossen wird.
- Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Holz mit Na2SO3 und NaOH aufgeschlossen wird.
- Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Holz mit NaOH allein aufgeschlossen wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934327774 DE4327774A1 (de) | 1993-08-18 | 1993-08-18 | Verfahren zur Herstellung von mitteldichten Holzfaserplatten (MDF) |
DE4327774 | 1993-08-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0639434A1 EP0639434A1 (de) | 1995-02-22 |
EP0639434B1 EP0639434B1 (de) | 1996-09-18 |
EP0639434B2 true EP0639434B2 (de) | 2004-01-07 |
Family
ID=6495480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940111375 Expired - Lifetime EP0639434B2 (de) | 1993-08-18 | 1994-07-21 | Verfahren zur Herstellung von mitteldichten Holzfaserplatten (MDF) |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0639434B2 (de) |
DE (2) | DE4327774A1 (de) |
DK (1) | DK0639434T4 (de) |
ES (1) | ES2094601T5 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007054123A1 (de) | 2006-11-15 | 2008-07-31 | Roffael, Edmone, Prof. Dr.-Ing. | Verfahren zur Herstellung von Holzfaserplatten mit verringerter Formaldehydemission, hoher Feuchtebeständigkeit und Hydrolyseresistenz der Verleimung |
DE102008023007A1 (de) | 2007-11-11 | 2010-06-02 | Roffael, Edmone, Prof. Dr.-Ing. | Verfahren zur Herstellung von Holzfaserplatten mit verringerter Formaldehydemission, hoher Feuchtebeständigkeit und Hydrolyseresistenz der Verleimung |
CN102268832A (zh) * | 2011-07-15 | 2011-12-07 | 芬欧汇川(常熟)纸业有限公司 | 使用落叶松化机浆生产中高档文化用纸的制浆造纸工艺 |
EP3178622A1 (de) | 2015-12-07 | 2017-06-14 | SWISS KRONO Tec AG | Holzwerkstoffplatte mit reduzierter emission an flüchtigen organischen verbindungen (vocs) und verfahren zu deren herstellung |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19704054C2 (de) * | 1997-02-04 | 2000-08-10 | Stockhausen Chem Fab Gmbh | Verfahren zur Herstellung von Faserstoffen mit verbesserten Eigenschaften |
SE513336C2 (sv) * | 1998-10-14 | 2000-08-28 | Tetra Laval Holdings & Finance | Fiberskiva av MDF-typ, sätt att framställa densamma, samt användning av återvunna cellulosafibrer för tillverkning av sådana fiberskivor |
WO2006039914A1 (de) * | 2004-10-15 | 2006-04-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur verminderung der abgabe von flüchtigen organischen verbindungen (voc) aus holz und holzzerkleinerungsprodukten und aus daraus hergestellten holzwerkstoffen, insbesondere holzspanplatten |
DE102005019627B3 (de) * | 2005-04-26 | 2006-10-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung von mitteldichten Faserplatten und Faserformteilen mit verringerter Emission und niedriger Dickenquellung |
DE102010053467A1 (de) | 2010-12-03 | 2012-06-06 | Edmone Roffael | Verfahren zur Verminderung der Dickenquellung und Wasseraufnahme von Faserplatten |
CN102677501B (zh) * | 2012-05-29 | 2015-04-22 | 宜宾丝丽雅集团有限公司 | 一种本色未漂针叶木和阔叶木复合纸浆改性制备溶解浆的备料工艺 |
ES2935907T3 (es) | 2015-04-21 | 2023-03-13 | Kastamonu Entegre Agac Sanayi Anonim Sirketi | Proceso de producción de las resinas que contienen poliflavonoides y derivados y su aplicación en los productos de tableros de materiales compuestos a base de madera |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE403893C (sv) * | 1977-02-03 | 1984-10-29 | Ry Ab | Sett att befria spanskivor fran formaldehyd genom behandling med ammoniak uder bildning av hexametylentetraamin |
SE436368B (sv) * | 1979-01-12 | 1984-12-03 | Sunds Defibrator | Sett att framstella blekta, mekaniska, kemimekaniska och halvkemiska massor av lignocellulosahaltiga fibermaterial |
WO1992012836A1 (en) * | 1991-01-23 | 1992-08-06 | Aci Australia Limited | Building substrate and method of manufacturing same |
SE470330B (sv) * | 1992-06-11 | 1994-01-24 | Sunds Defibrator Ind Ab | Förfarande för framställning av fiberboard enligt torra metoden |
WO1993025385A1 (en) * | 1992-06-12 | 1993-12-23 | Aluminum Company Of America | Method of fabricating multilayer structures with nonplanar surfaces |
SE502663C2 (sv) * | 1993-05-19 | 1995-12-04 | Sunds Defibrator Ind Ab | Förfarande för framställning av skivor av lignocellulosahaltigt material |
-
1993
- 1993-08-18 DE DE19934327774 patent/DE4327774A1/de not_active Withdrawn
-
1994
- 1994-07-21 DE DE59400679T patent/DE59400679D1/de not_active Expired - Lifetime
- 1994-07-21 EP EP19940111375 patent/EP0639434B2/de not_active Expired - Lifetime
- 1994-07-21 DK DK94111375T patent/DK0639434T4/da active
- 1994-07-21 ES ES94111375T patent/ES2094601T5/es not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007054123A1 (de) | 2006-11-15 | 2008-07-31 | Roffael, Edmone, Prof. Dr.-Ing. | Verfahren zur Herstellung von Holzfaserplatten mit verringerter Formaldehydemission, hoher Feuchtebeständigkeit und Hydrolyseresistenz der Verleimung |
DE102008023007A1 (de) | 2007-11-11 | 2010-06-02 | Roffael, Edmone, Prof. Dr.-Ing. | Verfahren zur Herstellung von Holzfaserplatten mit verringerter Formaldehydemission, hoher Feuchtebeständigkeit und Hydrolyseresistenz der Verleimung |
CN102268832A (zh) * | 2011-07-15 | 2011-12-07 | 芬欧汇川(常熟)纸业有限公司 | 使用落叶松化机浆生产中高档文化用纸的制浆造纸工艺 |
CN102268832B (zh) * | 2011-07-15 | 2013-09-25 | 芬欧汇川(中国)有限公司 | 使用落叶松化机浆生产中高档文化用纸的制浆造纸工艺 |
EP3178622A1 (de) | 2015-12-07 | 2017-06-14 | SWISS KRONO Tec AG | Holzwerkstoffplatte mit reduzierter emission an flüchtigen organischen verbindungen (vocs) und verfahren zu deren herstellung |
WO2017097506A1 (de) | 2015-12-07 | 2017-06-15 | SWISS KRONO Tec AG | Holzwerkstoffplatte mit reduzierter emission an flüchtigen organischen verbindungen (vocs) und verfahren zu deren herstellung |
US10399245B2 (en) | 2015-12-07 | 2019-09-03 | SWISS KRONO Tec AG | Wood material board with reduced emission of volatile organic compounds (VOCs) and method for the production thereof |
US11148317B2 (en) | 2015-12-07 | 2021-10-19 | SWISS KRONO Tec AG | Wood material board with reduced emission of volatile organic compounds (VOCs) and method for the production thereof |
Also Published As
Publication number | Publication date |
---|---|
ES2094601T5 (es) | 2004-09-01 |
DK0639434T3 (da) | 1996-10-21 |
ES2094601T3 (es) | 1997-01-16 |
EP0639434A1 (de) | 1995-02-22 |
DK0639434T4 (da) | 2004-02-09 |
DE59400679D1 (de) | 1996-10-24 |
EP0639434B1 (de) | 1996-09-18 |
DE4327774A1 (de) | 1995-02-23 |
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