WO1993025358A1 - Manufacture of board - Google Patents
Manufacture of board Download PDFInfo
- Publication number
- WO1993025358A1 WO1993025358A1 PCT/SE1993/000388 SE9300388W WO9325358A1 WO 1993025358 A1 WO1993025358 A1 WO 1993025358A1 SE 9300388 W SE9300388 W SE 9300388W WO 9325358 A1 WO9325358 A1 WO 9325358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- disintegrated
- board
- glue
- dried
- Prior art date
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
- 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 iscoloured 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 S0 3 and NaHS0 3 . These chemicals can be added in an amount of 1-30 kg/ton material expressed as Na 2 S0 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 S0 3 and NaHS0 3 , in an amount of 1-30, preferably 10-20 kg/ton fiber material expressed as Na 2 S0 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.
- an impregnation solution with Na 2 S0 3 and NaHS0 3 will contain sulphite in the form of HS0 3 " and/or S0 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 S0 3 per ton chips, and one batch with 10 kg NaHS0 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. The results were as follows:
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940703807A KR950701267A (en) | 1992-06-11 | 1993-05-04 | Cardboard manufacturing method |
SK1530-94A SK153094A3 (en) | 1992-06-11 | 1993-05-04 | Method of manufacture of fibrous boards |
BR9306513A BR9306513A (en) | 1992-06-11 | 1993-05-04 | Process for the manufacture of plastic fiber in sheets |
EP93913692A EP0647174B1 (en) | 1992-06-11 | 1993-05-04 | Manufacture of board |
AU43633/93A AU662432B2 (en) | 1992-06-11 | 1993-05-04 | Manufacture of fibre board |
DE69305165T DE69305165T2 (en) | 1992-06-11 | 1993-05-04 | MANUFACTURE OF FIBERBOARDS |
RU9394046252A RU2083359C1 (en) | 1992-06-11 | 1993-05-04 | Method of manufacturing fiber board |
PL93306760A PL170405B1 (en) | 1992-06-11 | 1993-05-04 | Fibreboard making method |
JP6501367A JPH07507735A (en) | 1992-06-11 | 1993-05-04 | paperboard manufacturing |
NO944779A NO944779L (en) | 1992-06-11 | 1994-12-09 | Manufacture of plate |
FI945790A FI97032C (en) | 1992-06-11 | 1994-12-09 | Manufacture of fibreboard |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9201800-1 | 1992-06-11 | ||
SE9201800A SE470330B (en) | 1992-06-11 | 1992-06-11 | Process for making fiberboard according to the dry method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993025358A1 true WO1993025358A1 (en) | 1993-12-23 |
Family
ID=20386472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1993/000388 WO1993025358A1 (en) | 1992-06-11 | 1993-05-04 | Manufacture of board |
Country Status (29)
Country | Link |
---|---|
EP (1) | EP0647174B1 (en) |
JP (1) | JPH07507735A (en) |
KR (1) | KR950701267A (en) |
CN (1) | CN1029461C (en) |
AT (1) | ATE143625T1 (en) |
AU (1) | AU662432B2 (en) |
BR (1) | BR9306513A (en) |
CA (1) | CA2136537A1 (en) |
CZ (1) | CZ281548B6 (en) |
DE (1) | DE69305165T2 (en) |
DK (1) | DK0647174T3 (en) |
ES (1) | ES2095060T3 (en) |
FI (1) | FI97032C (en) |
HR (1) | HRP930967A2 (en) |
HU (1) | HU213466B (en) |
ID (1) | ID841B (en) |
IL (1) | IL105811A (en) |
MY (1) | MY131192A (en) |
NO (1) | NO944779L (en) |
NZ (1) | NZ253367A (en) |
PL (1) | PL170405B1 (en) |
RU (1) | RU2083359C1 (en) |
SE (1) | SE470330B (en) |
SI (1) | SI9300293A (en) |
SK (1) | SK153094A3 (en) |
TR (1) | TR28107A (en) |
TW (1) | TW223036B (en) |
WO (1) | WO1993025358A1 (en) |
ZA (1) | ZA934108B (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TR22594A (en) * | 1987-04-07 | 1987-12-15 | Nur Emaye San Ve Tic Tic A S | STOVE PIPE EXTENSION APPARATUS |
EP0639434A1 (en) * | 1993-08-18 | 1995-02-22 | Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. | Method for the manufacture of medium density wood fibre boards (MDF) |
WO1997038833A1 (en) * | 1996-04-12 | 1997-10-23 | Marlit Ltd. | Method for production of lignocellulosic composite materials |
WO1998024605A1 (en) * | 1996-12-02 | 1998-06-11 | Marlit Ltd. | Method for use of recycled lignocellulosic composite materials |
WO1999002318A1 (en) * | 1997-07-11 | 1999-01-21 | Marlit Ltd. | Manufacture of composite boards |
WO2006039914A1 (en) * | 2004-10-15 | 2006-04-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for reducing the release of volatile organic compounds (voc) from wood and wood chip products and wood materials derived therefrom in particular particle boards |
WO2008030172A1 (en) * | 2006-09-04 | 2008-03-13 | Metso Panelboard Ab | Manufacture of fiberboard |
DE102007054123A1 (en) | 2006-11-15 | 2008-07-31 | Roffael, Edmone, Prof. Dr.-Ing. | Medium density wood fiberboard producing method, involves gluing fibers in blow line with amino resin, and transferring fibers when glued with amino resin by adhesives based on polymeric diphenylmethane diisocyanate |
DE102008023007A1 (en) | 2007-11-11 | 2010-06-02 | Roffael, Edmone, Prof. Dr.-Ing. | Method for producing moisture-resistant and hydrolysis-resistant medium density fiberboard from e.g. derived timber product, involves using chemicals for pulping, where chemicals partially or completely replace resin in gluing phase |
DE102008050428A1 (en) | 2008-10-08 | 2010-06-10 | Roffael, Edmone, Prof. Dr.-Ing. | Medium-density fiberboard manufacturing method, involves performing disintegration of fiber plates in presence of accelerator provided for alkaline hardening phenol formaldehyde resin and as potassium carbonate and/or sodium carbonate |
DE102007055415B9 (en) * | 2007-11-19 | 2013-08-29 | Kronotec Ag | Method for reducing the emission of saturated and unsaturated aldehydes from wood-based materials |
EP2176354B2 (en) † | 2007-08-10 | 2016-11-09 | SWISS KRONO Tec AG | Method for reducing the emission of aldehydes and volatile organic compounds of wood material |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE244626T1 (en) | 1996-12-09 | 2003-07-15 | Plato Internat Technology B V | METHOD FOR PRODUCING CELLULOSE FIBER ASSEMBLY |
WO2007012350A1 (en) * | 2005-07-27 | 2007-02-01 | Kronospan Technical Company Ltd. | Method for production of wood material articles with low emissions of chemical compounds |
CN101786286B (en) * | 2010-04-20 | 2012-04-25 | 东北林业大学 | Manufacturing method for modified enzymolysis lignin composite board |
CN104690804B (en) * | 2015-02-14 | 2017-07-18 | 广西丰林木业集团股份有限公司 | A kind of manufacture method of electro-magnetic screen function fiberboard |
EP3059056A1 (en) * | 2015-02-23 | 2016-08-24 | Basf Se | Method for producing wood fibres and wood fibre boards |
CN109986676A (en) * | 2019-04-06 | 2019-07-09 | 安徽凯彦达环保餐具有限公司 | A kind of production technology for the disposable lunch-box that can be degraded in a natural environment |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD205382A1 (en) * | 1981-12-23 | 1983-12-28 | Heinz Pecina | METHOD FOR ACTIVATING WOODEN PARTICLES FOR WOOD PRODUCTION OF MATERIALS |
DD242193A1 (en) * | 1985-11-06 | 1987-01-21 | Univ Dresden Tech | METHOD FOR PRODUCING WOOD MATERIALS |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE466060C (en) * | 1990-02-13 | 1995-07-11 | Moelnlycke Ab | Absorbent chemitermomechanical mass and preparation thereof |
SU1721149A1 (en) * | 1990-06-25 | 1992-03-23 | Центральный научно-исследовательский институт бумаги | Method of producing thermochemically-treated pulp |
SU1724763A1 (en) * | 1990-07-10 | 1992-04-07 | Центральный научно-исследовательский институт бумаги | Method of producing bleached wood pulp |
-
1992
- 1992-06-11 SE SE9201800A patent/SE470330B/en not_active IP Right Cessation
-
1993
- 1993-05-04 SK SK1530-94A patent/SK153094A3/en unknown
- 1993-05-04 DE DE69305165T patent/DE69305165T2/en not_active Revoked
- 1993-05-04 ES ES93913692T patent/ES2095060T3/en not_active Expired - Lifetime
- 1993-05-04 AU AU43633/93A patent/AU662432B2/en not_active Ceased
- 1993-05-04 CZ CZ943088A patent/CZ281548B6/en unknown
- 1993-05-04 CA CA002136537A patent/CA2136537A1/en not_active Abandoned
- 1993-05-04 NZ NZ253367A patent/NZ253367A/en unknown
- 1993-05-04 EP EP93913692A patent/EP0647174B1/en not_active Revoked
- 1993-05-04 AT AT93913692T patent/ATE143625T1/en not_active IP Right Cessation
- 1993-05-04 BR BR9306513A patent/BR9306513A/en not_active Application Discontinuation
- 1993-05-04 RU RU9394046252A patent/RU2083359C1/en active
- 1993-05-04 JP JP6501367A patent/JPH07507735A/en active Pending
- 1993-05-04 HU HU9403101A patent/HU213466B/en not_active IP Right Cessation
- 1993-05-04 PL PL93306760A patent/PL170405B1/en unknown
- 1993-05-04 KR KR1019940703807A patent/KR950701267A/en not_active Application Discontinuation
- 1993-05-04 WO PCT/SE1993/000388 patent/WO1993025358A1/en not_active Application Discontinuation
- 1993-05-04 DK DK93913692.5T patent/DK0647174T3/en active
- 1993-05-17 TW TW082103924A patent/TW223036B/zh active
- 1993-05-20 CN CN93106167A patent/CN1029461C/en 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/en unknown
- 1993-06-08 ID IDP614393A patent/ID841B/en unknown
- 1993-06-10 ZA ZA934108A patent/ZA934108B/en unknown
- 1993-06-11 HR HR930967A patent/HRP930967A2/en not_active Application Discontinuation
- 1993-06-11 TR TR00460/93A patent/TR28107A/en unknown
-
1994
- 1994-12-09 NO NO944779A patent/NO944779L/en unknown
- 1994-12-09 FI FI945790A patent/FI97032C/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD205382A1 (en) * | 1981-12-23 | 1983-12-28 | Heinz Pecina | METHOD FOR ACTIVATING WOODEN PARTICLES FOR WOOD PRODUCTION OF MATERIALS |
DD242193A1 (en) * | 1985-11-06 | 1987-01-21 | Univ Dresden Tech | METHOD FOR PRODUCING WOOD MATERIALS |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TR22594A (en) * | 1987-04-07 | 1987-12-15 | Nur Emaye San Ve Tic Tic A S | STOVE PIPE EXTENSION APPARATUS |
EP0639434A1 (en) * | 1993-08-18 | 1995-02-22 | Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. | Method for the manufacture of medium density wood fibre boards (MDF) |
US6346165B1 (en) | 1996-04-12 | 2002-02-12 | Marlit Ltd. | Method for production of lignocellulosic composite materials |
WO1997038833A1 (en) * | 1996-04-12 | 1997-10-23 | Marlit Ltd. | Method for production of lignocellulosic composite materials |
CN1087213C (en) * | 1996-04-12 | 2002-07-10 | 马利特有限公司 | Method for production of lignocellulosic composite materials |
WO1998024605A1 (en) * | 1996-12-02 | 1998-06-11 | Marlit Ltd. | Method for use of recycled lignocellulosic composite materials |
WO1999002318A1 (en) * | 1997-07-11 | 1999-01-21 | Marlit Ltd. | Manufacture of composite boards |
WO2006039914A1 (en) * | 2004-10-15 | 2006-04-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for reducing the release of volatile organic compounds (voc) from wood and wood chip products and wood materials derived therefrom in particular particle boards |
WO2008030172A1 (en) * | 2006-09-04 | 2008-03-13 | Metso Panelboard Ab | Manufacture of fiberboard |
DE102007054123A1 (en) | 2006-11-15 | 2008-07-31 | Roffael, Edmone, Prof. Dr.-Ing. | Medium density wood fiberboard producing method, involves gluing fibers in blow line with amino resin, and transferring fibers when glued with amino resin by adhesives based on polymeric diphenylmethane diisocyanate |
EP2176354B2 (en) † | 2007-08-10 | 2016-11-09 | SWISS KRONO Tec AG | Method for reducing the emission of aldehydes and volatile organic compounds of wood material |
DE102008023007A1 (en) | 2007-11-11 | 2010-06-02 | Roffael, Edmone, Prof. Dr.-Ing. | Method for producing moisture-resistant and hydrolysis-resistant medium density fiberboard from e.g. derived timber product, involves using chemicals for pulping, where chemicals partially or completely replace resin in gluing phase |
DE102007055415B9 (en) * | 2007-11-19 | 2013-08-29 | Kronotec Ag | Method for reducing the emission of saturated and unsaturated aldehydes from wood-based materials |
DE102007055415C5 (en) | 2007-11-19 | 2018-11-29 | SWISS KRONO Tec AG | Method for reducing the emission of saturated and unsaturated aldehydes from wood-based materials |
DE102008050428A1 (en) | 2008-10-08 | 2010-06-10 | Roffael, Edmone, Prof. Dr.-Ing. | Medium-density fiberboard manufacturing method, involves performing disintegration of fiber plates in presence of accelerator provided for alkaline hardening phenol formaldehyde resin and as potassium carbonate and/or sodium carbonate |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0647174B1 (en) | Manufacture of board | |
EP1011939B1 (en) | Manufacture of composite boards | |
EP0942815A1 (en) | Method for use of recycled lignocellulosic composite materials | |
WO1988002417A1 (en) | A method for the manufacture of products containing fibers of lignocellulosic material | |
EP0199481B1 (en) | A process for the manufacture of cellulose pulps | |
SK143695A3 (en) | Board and manufacture thereof | |
US3202569A (en) | Cold caustic fiberboard manufacture | |
GB1595719A (en) | Method of applying one or more layers of surface stock to the web of base pulp in fibreboard manufacture by the wet-lay system | |
RU2080429C1 (en) | Wet method for manufacturing cardboard | |
DE19958756A1 (en) | Production of light-colored medium-density fibreboard (MDF) from old fibreboard comprises treatment with sodium sulfite, conversion into pulp and feeding into the blow-line of an MDF plant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR CA CZ FI HU JP KR NO NZ PL RO RU SK UA US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1993913692 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 253367 Country of ref document: NZ |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2136537 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: PV1994-3088 Country of ref document: CZ |
|
ENP | Entry into the national phase |
Ref document number: 1994 351359 Country of ref document: US Date of ref document: 19941209 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 153094 Country of ref document: SK Ref document number: 945790 Country of ref document: FI Ref document number: 94-01974 Country of ref document: RO |
|
WWP | Wipo information: published in national office |
Ref document number: 1993913692 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: PV1994-3088 Country of ref document: CZ |
|
WWG | Wipo information: grant in national office |
Ref document number: 1993913692 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 945790 Country of ref document: FI |
|
WWG | Wipo information: grant in national office |
Ref document number: PV1994-3088 Country of ref document: CZ |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1993913692 Country of ref document: EP |