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WO2006114089A1 - Procede pour fabriquer des panneaux de fibres a moyenne densite et elements de moulage fibreux a emissions polluantes reduites et faible gonflement - Google Patents

Procede pour fabriquer des panneaux de fibres a moyenne densite et elements de moulage fibreux a emissions polluantes reduites et faible gonflement Download PDF

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Publication number
WO2006114089A1
WO2006114089A1 PCT/DE2006/000728 DE2006000728W WO2006114089A1 WO 2006114089 A1 WO2006114089 A1 WO 2006114089A1 DE 2006000728 W DE2006000728 W DE 2006000728W WO 2006114089 A1 WO2006114089 A1 WO 2006114089A1
Authority
WO
WIPO (PCT)
Prior art keywords
lignocelluloses
binder
tannin
fibers
added
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.)
Ceased
Application number
PCT/DE2006/000728
Other languages
German (de)
English (en)
Inventor
Edmone Roffael
Thomas Schneider
Brigitte Dix
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority to PL06742271T priority Critical patent/PL1874513T3/pl
Priority to AT06742271T priority patent/ATE477095T1/de
Priority to EP06742271A priority patent/EP1874513B1/fr
Priority to DE502006007638T priority patent/DE502006007638D1/de
Publication of WO2006114089A1 publication Critical patent/WO2006114089A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a process for the production of medium-density fiberboard (MDF) with reduced emission of volatile organic compounds (VOC) and at the same time low swelling in thickness.
  • MDF medium-density fiberboard
  • VOC volatile organic compounds
  • volatile organic compounds 5 organic substances are subsumed, the boiling point between 5O 0 C and 26O 0 C.
  • Most of the volatile organic compounds come from the wood, but sometimes also from the binder.
  • the interaction between binder and wood also influences the composition of the volatile constituents, further influencing factors being the production conditions of the medium-density fiberboard.
  • Wood-based materials also emit formaldehyde. However, formaldehyde is not included in the definition of volatile organic compounds.
  • Lignocelluloses may be woods, annual plants and used chipboard and fiberboard.
  • thermomechanical process TMP process
  • CTMP process chemithermomechanical process
  • Wood chips washed first to remove any existing sand particles. After washing, the wood chips are usually pre-steamed at temperatures between 60 0 C and 8O 0 C and then get via screw conveyance in the so-called cooker, where they are usually digested at temperatures of 17O 0 C to 180 0 C thermohydrolytic. After digestion, the digested chips are transferred to a pressure refiner, where they are defibrated under pressure at temperatures of also 17O 0 C to 18O 0 C. The defibering in the pressure refiner can be followed by a non-pressurized refining stage.
  • the digestion conditions can be varied depending on the raw material, so lower temperatures of 140 0 C to 16O 0 C can be used for digestion in annual plants.
  • the fibers are conveyed by the pressure prevailing in the refiner into a blow pipe, where they are provided with a binder.
  • chemicals such as sodium sulfite and sodium hydroxide, or combinations of sodium sulfite and sodium hydroxide, are added to the wood chippings before or during digestion. The addition of other chemicals is possible.
  • binders for the production of medium-density fiberboard mainly amino resins such as urea-formaldehyde resins (UF resins) are used, other synthetic binders such as alkaline curing phenol-formaldehyde resins (PF resins) and adhesives based on polymeric diisocyanates (PMDI), however, have only a relatively small importance , It is also possible to use thermoplastic binders such as methacrylate reaction resins for bonding fibers.
  • the binder used for the production of MDF is often injected into the blast line, but it can also be applied after drying the fibers in a blender.
  • Combinations of the two methods are also possible, so only a part of the binder can be injected into the blowing line and the rest are applied only after drying in the blender. It can also enter the blowpipe Binder of certain composition introduced and used after drying another binder with different composition.
  • binders based on natural substances such as tannin-formaldehyde resins (TF resins) can be used for the production of MDF.
  • the TF resins are obtained by reaction between tannins and formaldehyde.
  • the tannins in particular the condensed tannins, are obtained by extraction from certain barks and woods. Particularly suitable for this Quebrachoholz (Quebracho colorado) and bark such as acacia bark (Acacia mearnsii), spruce bark (Picea abies) etc.
  • the extraction of tannins from wood and bark is usually carried out at temperatures between 7O 0 C and 13O 0 C in water in the cascade process according to the countercurrent principle.
  • binders During extraction, chemicals such as sodium sulfite and / or sodium hydroxide may also be added to predominantly increase the solubility of tannin in the water. The sulfitation of tannin can also take place after the extraction.
  • the extracted tannins are reacted with formaldehyde.
  • starch As another natural binder, starch can be used in various forms (native starch, oxidized starch, modified starch). Also combinations of tannin and starch are known as binders.
  • the volatile degradation components of the wood, coming from the refiner, may be partially emitted during the drying of the fiber to the environment since they are steam volatile. Furthermore, the volatile acids can act as a hardener and the injected binder in the
  • the object of the invention is firstly to reduce the amount of volatile constituents of medium-density fiberboard and to largely prevent their formation and secondly to improve the physical and technological properties of the plates produced. In particular, the thickness swelling of the plates should be reduced.
  • condensed tannins such as quebracho and acacia bark tannins
  • CTMP process when added or present in low optimized amounts during fiber production by the CTMP process in the refiner, not only reduce the emissions of volatile organic compounds from the fibers but also the emission of VOC of plates made diminish, and significantly improve their physical-te "ch ⁇ ⁇ ölög ⁇ schen properties.
  • the application of CTMP process alone surprisingly reduces the emission of the manufactured medium density fiberboards but has no appreciable reducing effect on the thickness swelling and water absorption of the plates.
  • polyphenolic condensed tannins alone reduces the thickness swelling of the plates, but has no diminishing effect on the emission.
  • This method differs from the teaching of EP 1 266 730 A1, which has the object of adding condensed tannins to the wet chips or fibers prior to gluing the chips or fibers.
  • the tannins are not present during the digestion, and the fibers do not have to be obtained by the CTMP process.
  • digestion by the CTMP method is as obligatory as the addition of optimized amounts of condensed tannins.
  • the polyphenolic condensed tannins may be added to the refiner along with other additives such as water repellents and / or other polyphenolic materials such as cashew nut oils.
  • Tannins on the emission of the produced plates of formaldehyde also after their production stops.
  • This method with a combined application of CTMP and the presence of tannins is suitable for all lignocelluloses.
  • the addition of chemicals in the sense of the CTMP process can be carried out prior to digestion or during the digestion in a known manner.
  • sodium sulfite, sodium bisulfite and sodium hydroxide or optimized mixtures thereof may be used.
  • pine wood chips were used at a temperature of
  • medium density fiberboards were made from fibers prepared by adding 1% Na 2 SO 3 and 0.5% NaOH (solid based on dry wood material) according to the CTMP method.
  • the digestion temperature was 17O 0 C.
  • the production of MDF was carried out under the same conditions as in the case of TMP fibers (see Experiment 1).
  • Wood material was added.
  • the digestion temperature was also 17O 0 C.
  • Table 1 Physico-technological properties of TMP and CTMP medium density fiberboards produced without and with the addition of condensed tannins
  • VOC emissions (hexanal, pentanal) of TMP and CTMP medium density fiberboard (MDF) made without and with the addition of condensed tannins.
  • MDF medium density fiberboard
  • Table 3 Formaldehyde release (24 hours) (mg / 1000 g dry fibers) from TMP and CTMP fibers made without and with the addition of condensed tannins
  • binders for the production of medium-density fiberboards can be those which lead to a moisture-resistant fiber-to-fiber bond as well as those which lead to fiber-to-fiber bonding with low moisture resistance.
  • Typical binders for the production of moisture-resistant adhesives are alkaline curing phenol-formaldehyde resins (PF resins), tannin-formaldehyde resins (TF resins), melamine-urea phenol-formaldehyde resins (MU PF resins) and adhesives based on PMDI (polymeric diphenylmethane diisocyanates). Binders that result in low moisture resistance fiber-to-fiber bonding include the urea formaldehyde resins (UF resins).

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)
  • Reinforced Plastic Materials (AREA)

Abstract

L'invention concerne un procédé pour fabriquer des panneaux de fibres, notamment à moyenne densité, en lignocelluloses. Selon l'invention, les lignocelluloses sont ouvertes par thermohydrolyse chimique, puis désintégrées dans un raffineur, dotées d'un liant, épandues en nattes de fibres et pressées en panneaux de fibres, les lignocelluloses étant désintégrées dans le raffineur en présence de tanins concentrés.
PCT/DE2006/000728 2005-04-26 2006-04-25 Procede pour fabriquer des panneaux de fibres a moyenne densite et elements de moulage fibreux a emissions polluantes reduites et faible gonflement Ceased WO2006114089A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL06742271T PL1874513T3 (pl) 2005-04-26 2006-04-25 Sposób wytwarzania płyt pilśniowych średniej gęstości i formatek o obniżonej emisji i niskiej podatności na pęcznienie
AT06742271T ATE477095T1 (de) 2005-04-26 2006-04-25 Verfahren zur herstellung von mitteldichten faserplatten und faserformteilen mit verringerter emission und niedriger dickenquellung
EP06742271A EP1874513B1 (fr) 2005-04-26 2006-04-25 Procede pour fabriquer des panneaux de fibres a moyenne densite et elements de moulage fibreux a emissions polluantes reduites et faible gonflement
DE502006007638T DE502006007638D1 (de) 2005-04-26 2006-04-25 Verfahren zur herstellung von mitteldichten faserplatten und faserformteilen mit verringerter emission und niedriger dickenquellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005019627A DE102005019627B3 (de) 2005-04-26 2005-04-26 Verfahren zur Herstellung von mitteldichten Faserplatten und Faserformteilen mit verringerter Emission und niedriger Dickenquellung
DE102005019627.6 2005-04-26

Publications (1)

Publication Number Publication Date
WO2006114089A1 true WO2006114089A1 (fr) 2006-11-02

Family

ID=36616885

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/000728 Ceased WO2006114089A1 (fr) 2005-04-26 2006-04-25 Procede pour fabriquer des panneaux de fibres a moyenne densite et elements de moulage fibreux a emissions polluantes reduites et faible gonflement

Country Status (7)

Country Link
EP (1) EP1874513B1 (fr)
AT (1) ATE477095T1 (fr)
DE (2) DE102005019627B3 (fr)
ES (1) ES2349873T3 (fr)
PL (1) PL1874513T3 (fr)
PT (1) PT1874513E (fr)
WO (1) WO2006114089A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022029621A1 (fr) * 2020-08-03 2022-02-10 Bertinazzo Davide Procédé d'obtention d'un précurseur hybride matière inorganique-bois et procédé d'obtention d'un hybride matière inorganique-bois
CN116061285A (zh) * 2022-12-06 2023-05-05 佳诺威集团股份有限公司 一种利用回收板条生产纤维板的工艺方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007054123B4 (de) * 2006-11-15 2012-03-15 Edmone Roffael Verfahren zur Herstellung von Holzfaserplatten mit verringerter Formaldehydemission, hoher Feuchtebeständigkeit und Hydrolyseresistenz der Verleimung
DE102007038041A1 (de) 2007-08-10 2009-02-12 Kronotec Ag Verfahren zur Vermeidung der Emission von Aldehyden und flüchtigen organischen Verbindungen aus Holzwerkstoffen
DE102009042361B4 (de) * 2009-09-23 2012-12-20 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zur Herstellung von kartonähnlichen Faserplatten aus Holzfasern
DE102015103511B4 (de) 2015-03-10 2018-09-20 Fritz Egger Gmbh & Co. Og Verfahren zur Herstellung eines Holzspanwerkstoffs und darin verwendete Härter für Aminoplaste

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639434A1 (fr) * 1993-08-18 1995-02-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication de panneaux de moyenne densité en fibres de bois (MDF)
WO1998037147A2 (fr) * 1997-02-20 1998-08-27 Kronospan Gmbh Composition adhesive et son utilisation
DE10124638A1 (de) * 2001-05-18 2002-11-21 Edmone Roffael Verfahren zur Herstellung von mit Tanninformaldehydharzen gebundenen Holzspan-und Holzfaserplatten
EP1266730A1 (fr) * 2001-06-12 2002-12-18 Akzo Nobel N.V. Procédé de fabrication des panneaux de fibres résistant à l'humidité
EP1442854A1 (fr) * 2001-10-29 2004-08-04 Shinji Gotou Procede de production de bois d'oeuvre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431316C1 (de) * 1994-09-02 1996-05-02 Schlingmann Gmbh & Co Verfahren zur Verminderung der Formaldehydabgabe von Holzspan- oder Faserplatten
DE10054163A1 (de) * 2000-11-02 2002-06-06 Wacker Polymer Systems Gmbh Verfahren zur Herstellung von Holzpressplatten
DE10320686B4 (de) * 2003-04-30 2015-02-05 Faurecia Innenraum Systeme Gmbh Verfahren zur Herstellung von Formkörpergrundmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639434A1 (fr) * 1993-08-18 1995-02-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication de panneaux de moyenne densité en fibres de bois (MDF)
WO1998037147A2 (fr) * 1997-02-20 1998-08-27 Kronospan Gmbh Composition adhesive et son utilisation
DE10124638A1 (de) * 2001-05-18 2002-11-21 Edmone Roffael Verfahren zur Herstellung von mit Tanninformaldehydharzen gebundenen Holzspan-und Holzfaserplatten
EP1266730A1 (fr) * 2001-06-12 2002-12-18 Akzo Nobel N.V. Procédé de fabrication des panneaux de fibres résistant à l'humidité
EP1442854A1 (fr) * 2001-10-29 2004-08-04 Shinji Gotou Procede de production de bois d'oeuvre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022029621A1 (fr) * 2020-08-03 2022-02-10 Bertinazzo Davide Procédé d'obtention d'un précurseur hybride matière inorganique-bois et procédé d'obtention d'un hybride matière inorganique-bois
CN116061285A (zh) * 2022-12-06 2023-05-05 佳诺威集团股份有限公司 一种利用回收板条生产纤维板的工艺方法

Also Published As

Publication number Publication date
PL1874513T3 (pl) 2011-02-28
ATE477095T1 (de) 2010-08-15
DE102005019627B3 (de) 2006-10-26
DE502006007638D1 (de) 2010-09-23
EP1874513A1 (fr) 2008-01-09
ES2349873T3 (es) 2011-01-12
EP1874513B1 (fr) 2010-08-11
PT1874513E (pt) 2010-10-25

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