EP1030766A1 - Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes - Google Patents

Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes

Info

Publication number
EP1030766A1
EP1030766A1 EP98958486A EP98958486A EP1030766A1 EP 1030766 A1 EP1030766 A1 EP 1030766A1 EP 98958486 A EP98958486 A EP 98958486A EP 98958486 A EP98958486 A EP 98958486A EP 1030766 A1 EP1030766 A1 EP 1030766A1
Authority
EP
European Patent Office
Prior art keywords
wood material
mat
isocyanate
wood
strand board
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
EP98958486A
Other languages
German (de)
English (en)
Other versions
EP1030766A4 (fr
Inventor
Robert D. Palardy
Brian S. Carlson
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.)
JM Huber Corp
Original Assignee
JM Huber Corp
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 JM Huber Corp filed Critical JM Huber Corp
Publication of EP1030766A1 publication Critical patent/EP1030766A1/fr
Publication of EP1030766A4 publication Critical patent/EP1030766A4/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • 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
    • 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
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/04—Time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12—Pressure

Definitions

  • the invention is generally related to oriented strand board and, more particularly, to improving the production efficiency and product quality in oriented strand board manufacturing.
  • Oriented strand board is commercially available from a number of companies including J. M. Huber Corporation, Georgia-Pacific corporation, Louisiana-Pacific, and a number of other sources.
  • This material has multiple layers of wood "flakes” or “strands” bonded together by a binding material such as phenol formaldehyde resin or isocyanate resin together with sizing materials such as paraffinic waxes.
  • the flakes are made by cutting thin slices with a knife edge parallel to the length of a debarked log.
  • the flakes are typically 0.01 to 0.5 inches thick, although thinner and thicker flakes can be used in some applications, and are typically, less than one inch to several inches long and less than one inch to a few inches wide. The flakes typically are longer than they are wide.
  • the flakes are first dried to remove water, and are then coated with a thin layer of binder and sizing material.
  • the coated flakes are then spread on a conveyor belt in a series of alternating layers, where one layer will have the flakes oriented generally in line with the conveyor belt, and the succeeding layer of flakes oriented generally perpendicular to the conveyor belt, such that alternating layers have flakes oriented in generally perpendicular to one another.
  • the word "strand” is used to signify the cellulosic fibers which make up the wood, and, because the grain of the wood runs the length of the wood flake, the "strands" in the oriented strand board are oriented generally perpendicular to each other in alternating layers.
  • Oriented strand board has been used in sheathing walls, wooden I-beam structural supports, and in roofs and floors where strength, light weight, ease of nailing and dimensional stability under varying moisture conditions are the most important attributes.
  • Oriented strand board is sold at a substantial discount compared to structural grades of soft plywood.
  • U.S. Patent 5,635,248 to Hsu et al. describes a process for producing a smooth hard finish on products such as oriented strand board.
  • a foamed polymerized latex emulsion is applied to the surface and dried. After drying, the emulsion is crushed, and then cured to form the coating, with post-cure heat treatments being found to improve the hardness of the coating.
  • U.S. Patent 5,554,429 to Iwata et al. discloses an oriented strand board flooring material which is indicated to have significant moisture resistance.
  • the oriented strand board is fabricated with the surface layers having strands with longer average length values and wider average width values than the centrally located layers.
  • Iwata uses a foaming urethane resin and a non-foaming aqueous emulsion-type phenol resin in combination to join the wood strips together.
  • Iwata also contemplates attaching a decorative sheet of material (e.g., oak sheets) to the oriented strand board surface using an aqueous polymeric isocyanate adhesive, and subsequently overcoating the decorative sheet with a polyurethane, thus producing high gloss, decorative, wood flooring which has the appearance of oak.
  • a decorative sheet of material e.g., oak sheets
  • Patent 5,596,924 to Gerhardt and an example of a continuous production process to form particleboard or fiberboard is described in U.S. Patent 5,538,676 to Biefeldt, and the complete contents of each of these patents is herein incorporated by reference.
  • a conveyor moves the mat through two opposing, closely spaced belts which press the flakes together.
  • a pair of heated plates or a heated moveable ram and an opposing table are positioned behind the opposing, closely spaced belts, and provide heat and additional pressing forces.
  • isocyanate-based binder materials such as methylene diphenyl diisocyanate (MDI) and polymeric methylene diphenyl diisocyanate (pMDI) are used in a continuous oriented strand board or "flake board” manufacturing process.
  • a mat of wood flakes or "strands" is produced which includes alternating layers of strands oriented generally perpendicular to each other.
  • the strands are coated with an isocyanate binder, which is preferably pMDI, as well as filler material.
  • the typical filler material is a paraffin based wax; however, wood fines, dyes, flours, and the like may also be included.
  • the mat is carried on a conveyor to a continuous press.
  • the mat is subjected to a steam treatment which both raises the temperature and the moisture content of the mat. Steam treatment softens the wood fibers and lowers the Tg of lignin to start lignin flow. Due to the use of isocyanate binder materials, the moisture provided by the steam as well as the moisture emanating from the wood material itself chemically reacts with the isocyanate to produce polyureas. In addition, the isocyanate binder materials chemically react with hydroxyl moieties on the cellulose and hemicellulose constituents of the wood material to produce urethane bonds.
  • isocyanate and, in particular, pMDI was not used as the resin or binder material in methods of producing oriented strand board which included the step of pre-heating wood material to obtain desirable moisture levels.
  • pre-curing whereby the resin would set before the wood material was compressed.
  • pre-curing does not take place.
  • the reactivity of the isocyanates with water and hydroxyl moities allows curing of the binder and fusion with the wood material to be achieved under relatively mild press operating conditions (e.g., temperature, pressure, and time of exposure) as well as at a faster production rate. This, in turn, reduces the amount of volatile organic compound (VOC) emissions produced.
  • the oriented strand board emanating from the continuous press has a relatively high moisture content which allows it to withstand thickness swelling under humid conditions.
  • Figure 1 is a cut-away isometric view of an oriented strand board showing the general orientation of wood flakes in the pressed, composite product;
  • Figure 2 is a schematic drawing showing the reaction chemistry of pMDI and phenol-formaldehyde (PF) resin systems
  • Figures 3a and 3b are a schematic drawings showing the chemical and mechanical bonding of pMDI resin to wood material in oriented strand board, and the mechanical bonding of PF resin to wood material in oriented strand board, respectively;
  • Figure 4 is a schematic side view of a continuous oriented strand board manufacturing system and method according to the present invention. Best Mode of Carrying Out Invention
  • oriented strand board 10 is comprised of multiple layers 12, 14, and 16, of wood "flakes" or "strands" which are preferably oriented generally pe ⁇ endicular to each other in adjacent layers.
  • the layers of strands may be oriented parallel to one another or oriented in a variety of other ways.
  • the size of the strands can vary and the number of layers in the oriented strand board can vary to meet a wide range of design requirements.
  • the size of strands in different layers may also vary.
  • the strands are held together by a binding material, and the oriented strand board typically includes a wax material for sizing.
  • the oriented strand board 10 can be produced by a variety of techniques; however, common to all fabrication processes is a step of subjecting layers 12, 14, and 16 to high temperature and pressure to fuse and bind them together using the binding material.
  • the binding material is an isocyanate, and most preferably a polyisocyanate such as pMDI.
  • Figure 2 compares the cure reaction of pMDI to the PF resin systems described in U.S. Patent 5,538,676 to Biefeldt. It is noted that with pMDI, urethane bonds are formed between hydroxyl moieties on the wood surface, such as those which occur along cellulose and hemicellulose chains. In addition, in the presence of moisture, urea bonds are created between pMDI monomers. In sharp contrast, in phenol-formaldehyde resins, the monomer sub-units react via a condensation reaction and release water as a reaction byproduct.
  • FIG. 3a shows that pMDI is chemically and mechanically bonded to wood material, while PF resin systems are most likely mechanically bonded to wood material in oriented strand board production.
  • PF resin systems are most likely mechanically bonded to wood material in oriented strand board production.
  • an isocyanate resin such as pMDI
  • chemical reactions proceed with the water molecules and hydroxy moieties because they are thermodynamically favored.
  • the net result is that an isocyanate resin system such as pMDI will achieve a stronger fusion with the wood material under reduced temperature and exposure time conditions compared to PF resin systems.
  • Figure 4 illustrates a continuous oriented strand board forming process according to the present invention.
  • a mat 18 of wood flakes progresses from left to right on a conveyor 20 through a continuous press 22 to produce a continuous sheet of oriented strand board 24.
  • the conveyor is preferably coated with a release agent to facilitate the releasing of the board from the press without delamination or blistering.
  • Typical release agents are wax-based release agents such as Blackhawk Specialty Chemical's EX-24 or soap-based release agents such as Houghton International's #8315.
  • the wood flakes or "strands" are positioned on the conveyor 20 as alternating layers where the "strands" in adjacent layers are oriented generally perpendicular to one another.
  • the number of layers will vary depending on the application and desired thickness of oriented strand board to be produced.
  • the mat 18 will be 1 to 20 inches thick.
  • the individual strands in the mat will be pre-coated with isocyanate binder, sizing, such as paraffin wax, and/or other materials such as dyes, etc., using conventional processes.
  • the preferred isocyanate binder is pMDI, and it is commercially available from the ICI Polyurethanes Group of New Jersey (as Rubinate pMDI), and from other commercial sources.
  • the isocyanate binder comprises about 1.5 to about 8% by weight of the mat, and the sizing materials comprise about 0.5% to about 4% by weight of the mat.
  • the moisture content of the mat 18 is preferably 2% to 20% by weight. Since pMDI and other isocyanates beneficially react with water, the moisture content need not be as strictly controlled or be as low as that which is employed when PF binder resins are used.
  • the mat 18 of wood material Prior to entering the continuous press, the mat 18 of wood material is exposed to a steam treatment by steam sources 26.
  • the steam sources may be positioned on opposite sides of the mat 18.
  • the conveyor 20 will be made of porous wire material such that steam can penetrate through to the bottom of the mat 18.
  • the steam functions to soften the wood fibers.
  • Steam also lowers the glass transition temperature (Tg) of lignin, and thereby enhances lignin flow in the wood material in the mat 18.
  • Tg glass transition temperature
  • water enhances the cure reaction of isocyanates thereby allowing relatively lower temperatures and reduced press times to be used in the press than if phenol-formaldehyde resin systems were utilized.
  • an oriented strand board product 24 having higher moisture content has improved resistance to thickness swelling caused by exposure to humidity.
  • the amount of steam can vary depending on the thickness of the mat, or the desired characteristics of the end product. It is expected that in most applications the steam will raise the temperature in the mat 18 from about 50 to about 95 °C and the moisture content from about 6 to about 24%.
  • isocyanates such as pMDI react with water molecules and hydroxyl moities at relatively low temperatures, the temperature and pressure and time of exposure conditions in the continuous press 22 can be reduced compared to when PF resins are used in order to achieve curing. Thus, no additional pre-heat stations are required prior to pressing as is the case in U.S. Patent 5,538,676 to Biefeldt. However, also because of the reaction, it is important that the mat 18 proceed directly into the press 26 so that the binder can fuse with the wood material. In prior art systems, pMDI has been used as a binder for oriented strand board production, but it has not been used in combination with steam pre- treatment.
  • continuous presses 22 can receive and process steam treated mat 18 on a continuous basis, it has been discovered that isocyanates can be used as the binder and that steam pre-treatment can be advantageously employed to achieve benefits in cure/press conditions and benefits in the physical properties of the oriented strand board 24 produced in oriented strand board manufacturing.
  • the continuous press 22 can be similar to those described in U.S. Patents 5,520,530, 5,538,676, and 5,596,924; however, a wide variety of continuous presses can be used in the practice of this invention.
  • the chief requirement for the continuous press 22 is that it be able to continuously take in mat 18 and press and heat the mat 18 to fuse the isocyanate binder to the wood material, and continuously output oriented strand board 24.
  • a continuous press 22 will typically have a pair of closely spaced, opposing conveyors 28, and internal, heated press plates 30 which can be progressively and repetitively moved toward each other. Instead of heated press plates 30, one moveable plate or "ram" and one stationary plate can be used.
  • the heated press plates are responsible for exerting a pressure on the mat material at a temperature which both cures the resin binder and fuses the wood and binder together.
  • the press plates 30 will typically move closer together than the gap between the opposing conveyors 28, and the distance between the press plates 30 can be varied to accommodate the production of oriented strand board 24 of differing thicknesses.
  • the temperature employed in the press 22 can vary depending on the application and properties of the oriented strand board to be produced, as well as the time period to traverse the press 22. In most applications employing isocyanate resin binders, the temperature of the belts in the press 22 will range from about 120 to about 260°C. When pMDI is used as the binder, the preferred temperature for the belts in press 22 ranges from about 175 to about 227°C. It should be apparent to those skilled in the art that the temperature can be varied to achieve similar end product results by varying the pressure and/or residence time in the press 22.
  • the pressure exerted by the press plates 30 can be varied in a similar manner to the temperature. In most applications in the practice of this invention the maximum pressure will range from about 300 to about 900 psi.
  • the residence time in the press 22 can be varied and is dependent on the length of the press 22, the speed of the conveyor 20, and the thickness of the panel. In most applications in the practice of this invention the residence time will range from 0.5 to 10 minutes.
  • the residence time in the press and product properties may also be modified through the addition of catalysts or polyols to the isocyanate or pMDI binder, or to the wood strands.
  • the temperature, pressure, and time in the press 22 be selected to allow for complete curing of the isocyanate resin and fusion with the wood material.
  • These operational specifications for the press, as well as the moisture content of the mat 18 as adjusted by the steam generators 26 can be varied to achieve the continuous production of oriented strand board 24 of desired moisture content. Experiments have shown that higher moisture content oriented strand board 24 is more resistant to thickness expansion and linear expansion resulting from exposure to humidity. In the preferred embodiment, the parameters used in the press and the steam generator will produce oriented strand board 24 having a moisture content ranging from about 4 to about 12% by weight.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

L'invention porte sur un panneau (1) à copeaux orientés produit au moyen d'une presse (22) à courroie continue et d'un liant d'isocyanate, par exposition à la vapeur du mat (18) de bois avant son introduction dans la presse. L'exposition à la vapeur génère de l'humidité qui assouplit les fibres ligneuses et intensifie l'écoulement de lignine dans le mat. De plus, l'humidité réagit au liant d'isocyanate en formant des polyurées à partir du liant (le liant préféré étant pMDI), ce qui réduit les conditions de durcissement (température, pression et durée) nécessaires à la presse pour faire fusionner le mat et le liant. Le liant d'isocyanate réagit également à des groupes hydroxyle dans la cellulose et les fibres d'hémicellulose du bois de manière à permettre la formation de liaisons chimiques et physiques avec le bois. Le panneau à copeaux orientés sortant de la presse a une teneur en humidité très élevée et un gonflement en épaisseur plus résistant dans des conditions humides.
EP98958486A 1997-11-12 1998-11-09 Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes Ceased EP1030766A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US968946 1992-12-17
US96894697A 1997-11-12 1997-11-12
US7896298A 1998-05-14 1998-05-14
US78962 1998-05-14
PCT/US1998/023699 WO1999024233A1 (fr) 1997-11-12 1998-11-09 Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes

Publications (2)

Publication Number Publication Date
EP1030766A1 true EP1030766A1 (fr) 2000-08-30
EP1030766A4 EP1030766A4 (fr) 2005-02-02

Family

ID=26761166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98958486A Ceased EP1030766A4 (fr) 1997-11-12 1998-11-09 Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes

Country Status (11)

Country Link
EP (1) EP1030766A4 (fr)
JP (1) JP4215392B2 (fr)
AR (1) AR017592A1 (fr)
AU (1) AU731505B2 (fr)
BR (1) BR9814024A (fr)
CA (1) CA2308547C (fr)
ID (1) ID25906A (fr)
MY (1) MY114970A (fr)
NZ (1) NZ505090A (fr)
PL (1) PL187489B1 (fr)
WO (1) WO1999024233A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2157170B1 (es) * 1999-10-26 2002-02-01 Tabsal Composites De Madera S Procedimiento para la produccion de tableros aglomerados de madera.
DE10124929B4 (de) * 2001-05-21 2004-09-30 Metso Paper Inc. Verfahren zur kontinuierlichen Herstellung von Faserplatten
CA2354909A1 (fr) 2001-08-08 2003-02-08 Liheng Chen Panneau a copeaux orientes legers
DE10163090A1 (de) * 2001-12-20 2003-07-03 Dieffenbacher Gmbh Maschf Verfahren zur kontinuierlichen Herstellung von Holzwerkstoffplatten
US7258761B2 (en) * 2004-11-12 2007-08-21 Huber Engineered Woods Llc Multi-step preheating processes for manufacturing wood based composites
EP1959913A1 (fr) * 2005-12-09 2008-08-27 DSMIP Assets B.V. Composition de stabilisation
DE102006058612A1 (de) * 2006-12-11 2008-06-19 Fritz Egger Gmbh & Co. Optimierte Trägerplatte
EP3242916A1 (fr) 2015-01-09 2017-11-15 ExxonMobil Research and Engineering Company Revêtement à la cire et procédés d'utilisation associés
WO2017146936A1 (fr) 2016-02-26 2017-08-31 Exxonmobil Research And Engineering Company Compositions de revêtement pour panneaux de copeaux orientés et procédés d'utilisation associés

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914106A1 (de) * 1989-04-28 1990-10-31 Siempelkamp Gmbh & Co Verfahren und anlage zur kontinuierlichen herstellung von spanplatten, faserplatten u. dgl.
AU642227B2 (en) * 1990-04-03 1993-10-14 Masonite Corporation Oriented strand board-fiberboard composite structure and method of making the same
DE4333614C2 (de) * 1993-10-01 1999-02-25 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur kontinuierlichen Herstellung von Spanplatten
DE4423632A1 (de) * 1994-07-06 1996-01-11 Siempelkamp Gmbh & Co Verfahren zum Vorwärmen von Streugut auf eine vorgebbare Vorwärmtemperatur im Zuge der Herstellung von Holzwerkstoffplatten
US5607633A (en) * 1995-07-13 1997-03-04 Archer Daniels Midland Company Co-adhesive system for bonding wood, fibers, or agriculture based composite materials

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO9924233A1 *

Also Published As

Publication number Publication date
CA2308547A1 (fr) 1999-05-20
WO1999024233A1 (fr) 1999-05-20
JP2001522735A (ja) 2001-11-20
JP4215392B2 (ja) 2009-01-28
AU731505B2 (en) 2001-03-29
EP1030766A4 (fr) 2005-02-02
AU1452599A (en) 1999-05-31
AR017592A1 (es) 2001-09-12
NZ505090A (en) 2002-05-31
ID25906A (id) 2000-11-09
BR9814024A (pt) 2000-09-26
PL340792A1 (en) 2001-02-26
PL187489B1 (pl) 2004-07-30
CA2308547C (fr) 2008-02-12
MY114970A (en) 2003-02-28

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Ipc: 7B 27N 3/00 B

Ipc: 7B 27N 3/18 B

Ipc: 7B 27N 3/14 B

Ipc: 7B 32B 31/20 B

Ipc: 7B 32B 5/12 B

Ipc: 7B 29C 43/30 A

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