EP0647174B1 - Manufacture of board - Google Patents
Manufacture of board Download PDFInfo
- Publication number
- EP0647174B1 EP0647174B1 EP93913692A EP93913692A EP0647174B1 EP 0647174 B1 EP0647174 B1 EP 0647174B1 EP 93913692 A EP93913692 A EP 93913692A EP 93913692 A EP93913692 A EP 93913692A EP 0647174 B1 EP0647174 B1 EP 0647174B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fiber
- disintegrated
- glue
- board
- dried
- 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.)
- Revoked
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000005470 impregnation Methods 0.000 claims abstract description 11
- 239000011094 fiberboard Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 8
- 230000003213 activating effect Effects 0.000 claims abstract description 4
- 239000002657 fibrous material Substances 0.000 claims description 11
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 9
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 6
- 229920005610 lignin Polymers 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 33
- 239000003292 glue Substances 0.000 description 19
- 238000005265 energy consumption Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 description 3
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- -1 sulphite ions Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
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
-
- 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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
Definitions
- This invention relates to the manufacture of board of lignocellulose-containing material, such as fiber board.
- Board of this kind is manufactured by disintegrating the material to particles containing fiber bundles and fibers. Glue is added to the disintegrated material and the material is dried and a web is formed which finally is pressed at increased temperature for curing the glue so that a board is formed.
- Fiber board is made of material which is disintegrated by defibering, i.e. of more or less free fibers.
- the binding agent normally used is urea formaldehyde glue, which is admixed to the disintegrated material.
- the amount of glue can be 6% or more.
- the glue is relatively expensive, and it is therefore desired to minimize the glue addition. A smaller amount of glue, however, deteriorates the strength of the completed board. In view thereof, the glue addition must be optimized.
- Fiber board manufactured according to the dry method normally is called MDF (Medium Density Fiberboard) and is a board product made of wood fiber.
- the yield exceeds 95%.
- the starting material preferably is wood chips, which are defibered with relatively low energy input, 100-500 kWh/ton fibers, for freeing the fibers.
- the defibered fiber material is glued, dried, formed to a web and pressed in a hot press. Alternatively, the material can be dried prior to the gluing.
- the material normally is preheated prior to the defibering to above 150°C whereafter the defibering is carried out under pressure at this high temperature in order to facilitate the freeing of the fibers. At such a high temperature, however, the material can be degradated and miscoloured due to occurring hydrolysis. A short heating time reduces this shortcoming, but miscolouring yet cannot be avoided, and at the same time the energy consumption increases.
- the urea formaldehyde glue normally used can be mixed with the fiber material on the conveying line (blow line) from the defibering apparatus or in a separate mixing device.
- the amount of admixed glue can be 6% or more.
- the fiber material is treated with an impregnation liquid containing fiber surface activating chemicals and preheated before it is finally disintegrated.
- Examples of such chemicals are such which affect the lignin, such as Na 2 SO 3 and NaHSO 3 . These chemicals can be added in an amount of 1-30 kg/ton material expressed as Na 2 SO 3 . According to the invention, it is possible to increase the ISO-brightness of the completed product, to reduce the energy consumption at the defibering, to reduce the glue amount at maintained strength or to increase the strength at maintained glue amount. Furthermore, also the formaldehyde separation can be reduced substantially.
- Fiberboard is manufactured by impregnating the raw material in the form of chips of, for example, softwood with lignin affecting chemicals, such as Na 2 SO 3 and NaHSO 3 , in an amount of 1-30, preferably 10-20 kg/ton fiber material expressed as Na 2 SO 3 .
- lignin affecting chemicals such as Na 2 SO 3 and NaHSO 3
- the impregnation which has to be carried out rapidly, can last some minute. Thereafter the temperature is increased to 150-200°C, preferably 160-180°C, for 2-3 minutes. However, the preheating can of course be performed prior to or at the same time as the impregnation.
- the pH value is kept within 2-12. This implies, that an impregnation solution with Na 2 SO 3 and NaHSO 3 will contain sulphite in the form of HSO 3 - and/or SO 3 2- .
- the pH value suitably can be controlled by NaOH. Due to this chemical treatment (sulphonation), the subsequent defibering can be carried out to the desired defibering degree with an energy input lower than normal.
- the energy consumption is in the interval 50-400 kWh/ton fiber material.
- the energy saving can amount to about 10% compared with conventional defibering.
- the strength properties of the completed board have improved substantially.
- the tensile strength as well as the elasticity modules and the fiber bond have increased by at least 10%.
- this effect can be utilized for reducing the amount of glue addition at maintained strength properties.
- a 10% increase in the fiber bond corresponds to a 1% decrease in glue addition.
- the sulphonation according to the invention also implies, that the separation of formaldehyde can be reduced, due to the fact, that the sulphite ions in the impregnation solution react with the formaldehyde so that it is bound in the fiber material instead of being given off from the completed board.
- Raw material in the form of chips was exposed to different impregnation treatment.
- One batch was treated with 10 kg Na 2 SO 3 per ton chips, and one batch with 10 kg NaHSO 3 per ton chips.
- a reference batch was not impregnated.
- the different batches were preheated to about 170°C and thereafter defibered.
- urea formaldehyde glue of the type E2 was added in an amount of 10% dry glue calculated on dry fiber.
- the material was thereafter dried to a dry matter content of about 90%.
- the fibers were dry formed to a mat, which was prepressed with a pressure of about 1.5 MPa and hot pressed for 5-6 minutes at 170°C.
- the board thus manufactured was tested on strength, ISO-brightness and formaldehyde content (perforator value). The relative energy consumption for the different batches was also measured.
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)
- Paper (AREA)
- Laminated Bodies (AREA)
- Multicomponent Fibers (AREA)
- Artificial Filaments (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Harvester Elements (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9201800A SE470330B (sv) | 1992-06-11 | 1992-06-11 | Förfarande för framställning av fiberboard enligt torra metoden |
| SE9201800 | 1992-06-11 | ||
| PCT/SE1993/000388 WO1993025358A1 (en) | 1992-06-11 | 1993-05-04 | Manufacture of board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0647174A1 EP0647174A1 (en) | 1995-04-12 |
| EP0647174B1 true EP0647174B1 (en) | 1996-10-02 |
Family
ID=20386472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93913692A Revoked EP0647174B1 (en) | 1992-06-11 | 1993-05-04 | Manufacture of board |
Country Status (29)
| Country | Link |
|---|---|
| EP (1) | EP0647174B1 (zh) |
| JP (1) | JPH07507735A (zh) |
| KR (1) | KR950701267A (zh) |
| CN (1) | CN1029461C (zh) |
| AT (1) | ATE143625T1 (zh) |
| AU (1) | AU662432B2 (zh) |
| BR (1) | BR9306513A (zh) |
| CA (1) | CA2136537A1 (zh) |
| CZ (1) | CZ281548B6 (zh) |
| DE (1) | DE69305165T2 (zh) |
| DK (1) | DK0647174T3 (zh) |
| ES (1) | ES2095060T3 (zh) |
| FI (1) | FI97032C (zh) |
| HR (1) | HRP930967A2 (zh) |
| HU (1) | HU213466B (zh) |
| ID (1) | ID841B (zh) |
| IL (1) | IL105811A (zh) |
| MY (1) | MY131192A (zh) |
| NO (1) | NO944779D0 (zh) |
| NZ (1) | NZ253367A (zh) |
| PL (1) | PL170405B1 (zh) |
| RU (1) | RU2083359C1 (zh) |
| SE (1) | SE470330B (zh) |
| SI (1) | SI9300293A (zh) |
| SK (1) | SK153094A3 (zh) |
| TR (1) | TR28107A (zh) |
| TW (1) | TW223036B (zh) |
| WO (1) | WO1993025358A1 (zh) |
| ZA (1) | ZA934108B (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120077908A1 (en) * | 2005-07-27 | 2012-03-29 | Wolfgang Seifert | Method for the Production of Wood Material Articles with Low Emissions of Chemical Compounds |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR22594A (tr) * | 1987-04-07 | 1987-12-15 | Nur Emaye San Ve Tic Tic A S | Soba borusu uzatma aparati |
| DE4327774A1 (de) * | 1993-08-18 | 1995-02-23 | Fraunhofer Ges Forschung | Verfahren zur Herstellung von mitteldichten Holzfaserplatten (MDF) |
| PL184356B1 (pl) | 1996-04-12 | 2002-10-31 | Marlit Ltd | Sposób wytwarzania lignocelulozowych materiałów złożonych |
| GB9625068D0 (en) * | 1996-12-02 | 1997-01-22 | Marlit Ltd | Method for production of lignocellulosic composite materials |
| ATE244626T1 (de) | 1996-12-09 | 2003-07-15 | Plato Internat Technology B V | Verfahren zur herstellung von zellulosefaseraggregaten |
| JP2001512058A (ja) * | 1997-07-11 | 2001-08-21 | マーリット リミテッド | 複合板の製造 |
| EP1799412B1 (de) * | 2004-10-15 | 2011-01-19 | 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 |
| SE530084C2 (sv) * | 2006-09-04 | 2008-02-26 | Metso Panelboard Ab | Tillverkning av träfiberskiva innehållande på plats genererad formaldehyd |
| 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 |
| 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 |
| DE102007055415C5 (de) * | 2007-11-19 | 2018-11-29 | SWISS KRONO Tec AG | Verfahren zur Verminderung der Emission von gesättigten und ungesättigten Aldehyden aus Holzwerkstoffen |
| DE102008050428A1 (de) | 2008-10-08 | 2010-06-10 | Roffael, Edmone, Prof. Dr.-Ing. | Verfahren zur Herstellung von mitteldichten Faserplatten (MDF) mit alkalisch härtenden Phenolformaldehydharzen |
| CN101786286B (zh) * | 2010-04-20 | 2012-04-25 | 东北林业大学 | 一种改性酶解木质素复合板的制造方法 |
| CN104690804B (zh) * | 2015-02-14 | 2017-07-18 | 广西丰林木业集团股份有限公司 | 一种电磁屏蔽功能纤维板的制造方法 |
| EP3059056A1 (de) * | 2015-02-23 | 2016-08-24 | Basf Se | Verfahren zur Herstellung von Holzfasern und Holzfaserplatten |
| CN109986676A (zh) * | 2019-04-06 | 2019-07-09 | 安徽凯彦达环保餐具有限公司 | 一种可在自然环境下降解的一次性餐盒的生产工艺 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD205382A1 (de) * | 1981-12-23 | 1983-12-28 | Heinz Pecina | Verfahren zur aktivierung von holzpartikeln fuer die holzwerkstoffherstellung |
| DD242193A1 (de) * | 1985-11-06 | 1987-01-21 | Univ Dresden Tech | Verfahren zur erzeugung von holzwerkstoffen |
| SE466060C (sv) * | 1990-02-13 | 1995-09-11 | Moelnlycke Ab | Absorberande kemitermomekanisk massa och framställning därav |
| SU1721149A1 (ru) * | 1990-06-25 | 1992-03-23 | Центральный научно-исследовательский институт бумаги | Способ получени химико-термомеханической массы |
| SU1724763A1 (ru) * | 1990-07-10 | 1992-04-07 | Центральный научно-исследовательский институт бумаги | Способ получени беленой древесной массы |
-
1992
- 1992-06-11 SE SE9201800A patent/SE470330B/sv not_active IP Right Cessation
-
1993
- 1993-05-04 CA CA002136537A patent/CA2136537A1/en not_active Abandoned
- 1993-05-04 DE DE69305165T patent/DE69305165T2/de not_active Revoked
- 1993-05-04 JP JP6501367A patent/JPH07507735A/ja active Pending
- 1993-05-04 HU HU9403101A patent/HU213466B/hu not_active IP Right Cessation
- 1993-05-04 DK DK93913692.5T patent/DK0647174T3/da active
- 1993-05-04 BR BR9306513A patent/BR9306513A/pt not_active Application Discontinuation
- 1993-05-04 WO PCT/SE1993/000388 patent/WO1993025358A1/en not_active Application Discontinuation
- 1993-05-04 ES ES93913692T patent/ES2095060T3/es not_active Expired - Lifetime
- 1993-05-04 EP EP93913692A patent/EP0647174B1/en not_active Revoked
- 1993-05-04 AU AU43633/93A patent/AU662432B2/en not_active Ceased
- 1993-05-04 PL PL93306760A patent/PL170405B1/pl unknown
- 1993-05-04 RU RU9394046252A patent/RU2083359C1/ru active
- 1993-05-04 AT AT93913692T patent/ATE143625T1/de not_active IP Right Cessation
- 1993-05-04 SK SK1530-94A patent/SK153094A3/sk unknown
- 1993-05-04 CZ CZ943088A patent/CZ281548B6/cs unknown
- 1993-05-04 KR KR1019940703807A patent/KR950701267A/ko not_active Application Discontinuation
- 1993-05-04 NZ NZ253367A patent/NZ253367A/en unknown
- 1993-05-17 TW TW082103924A patent/TW223036B/zh active
- 1993-05-20 CN CN93106167A patent/CN1029461C/zh not_active Expired - Fee Related
- 1993-05-21 MY MYPI93000970A patent/MY131192A/en unknown
- 1993-05-25 IL IL10581193A patent/IL105811A/en not_active IP Right Cessation
- 1993-06-02 SI SI9300293A patent/SI9300293A/sl unknown
- 1993-06-08 ID IDP614393A patent/ID841B/id unknown
- 1993-06-10 ZA ZA934108A patent/ZA934108B/xx unknown
- 1993-06-11 TR TR00460/93A patent/TR28107A/xx unknown
- 1993-06-11 HR HR930967A patent/HRP930967A2/xx not_active Application Discontinuation
-
1994
- 1994-12-09 NO NO944779A patent/NO944779D0/no unknown
- 1994-12-09 FI FI945790A patent/FI97032C/fi not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120077908A1 (en) * | 2005-07-27 | 2012-03-29 | Wolfgang Seifert | Method for the Production of Wood Material Articles with Low Emissions of Chemical Compounds |
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