WO2002100616A1 - Wood composite material and manufacture thereof - Google Patents

Wood composite material and manufacture thereof Download PDF

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Publication number
WO2002100616A1
WO2002100616A1 PCT/SE2002/001072 SE0201072W WO02100616A1 WO 2002100616 A1 WO2002100616 A1 WO 2002100616A1 SE 0201072 W SE0201072 W SE 0201072W WO 02100616 A1 WO02100616 A1 WO 02100616A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
powder paint
wood
composite material
weight
Prior art date
Application number
PCT/SE2002/001072
Other languages
French (fr)
Inventor
Stefan Hjort
Original Assignee
Ivf Industriforskning Och Utveckling Ab
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 Ivf Industriforskning Och Utveckling Ab filed Critical Ivf Industriforskning Och Utveckling Ab
Publication of WO2002100616A1 publication Critical patent/WO2002100616A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • 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
    • B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse

Definitions

  • Wood composite material and t ⁇ nutfct. ⁇ ure thereof
  • the present invention refers to a wood composite material in which residual material is used for the production of a material that is useful in many applications.
  • the invention further refers to a method for the production of said material.
  • thermoset glue is today about 18 SEK per kg glue.
  • the spray painting industry has today to a great extent changed from wet paint to powder paint.
  • the binder in such paint is a thermoset plastic.
  • the binder may for example be an epox -, polyester- or acrylic resin. Both in the manufacture and use of powder paint a certain amount of residual material is obtained. One has to get rid of this residual material in some way. Today powder remaining from the powder paint industry is left for incineration or is set and then deposited. The cost for getting rid of the residual material is today about 5 SEK per kilo. However within a near future restrictions against deposition are awaited.
  • JP 10-330536 it is known to produce an injection moulded product by using excess powder from the spray painting industry.
  • a filler in the form of small partcles of inorganic material, such as kaolin, is added to the powder paint.
  • the content of powder paint in the examples is from 67% and more.
  • the object and most important features of the invention is to provide a wood composite material in which the main component is wood particles such as powder, chips or fibers, which are bonded together with a binder and can be made in a cost efficient way.
  • the material contains at least 50% by weight wood material in the form of wood particles such as powder, chips or fibers and mo more than 50% by weight of powder paint, which as a main component contains thermoset resin and which acts as a binder between the wood particles.
  • powder paint mainly in the form of residual material from spray painting, powder paint manufacture or the like are intended to be used.
  • the final material contains preferably at least 60 % by weight and preferably at least 75 % by weight wood material.
  • a binder in which the powder paint is distributed can be contained.
  • the binder can be a thermoset resin, which is set together with the powder paint.
  • the invention further refers to a method for the manufacture of a composite material, wherein at least 50% by weight of wood material in the form of wood particles such as powder, chips or fibers and no more than 50% by weight powder paint, which as a main component contains a thermoset resin, are mixed, the mixture being heated and then shaped and set.
  • the wood composite material according to the invention contains as a main component wood particles in the form of powder, chips or fibers, which have been bonded together with a binder.
  • the amount of wood material should be at least 50, preferably at least 60 and more preferably at least 75% by weight.
  • the wood particles are mainly residual products from the wood industry.
  • Powder paint is used as binder, said powder paint as a main component containing a thermoset resin.
  • the powder paint can at least to a substantial extent contain a residual powder coming from spray painting and from the production of powder paint. When applying and manufacturing powder paint a certain amount therefore will be obtained as a residual material, which today is incinerated or alternatively is set and deposited.
  • This residual material is according to the invention used as a binder between wood particles, for the manufacture of a wood composite material similar to the ones that today are manufactured by mixing the wood particles with glue in the form of a thermoset resin glues or a thermoplastic glue.
  • the powder paint/lacquer is thus used for replacing this glue.
  • the powder paint/lacquer may of course partly of wholly also consist of first-class product, i.e. non-residual powder.
  • the powder paint/lacquer is optionally mixed with a liquid material, such as an additional glue, on one hand for avoiding dusting and on the other hand for making the powder to distribute better between the wood particles.
  • a liquid material such as an additional glue
  • the liquid material can be a thermoset glue, which sets together with the powder paint/lacquer. Examples of such thermoset glues are phenol-, epoxy-, polyester- and acrylic glues.
  • additives that may be contained in the material are for example pigment, further binders, fillers, release agents, flame guards.
  • the wood composite material according to the invention are produced by mixing the wood particles, which may vary in size from powder to coarse chips, with the powder paint, which optionally is mixed with a liquid material, as mentioned above.
  • the mixture is then heated to a suitable setting temperature, usually 130-180°C, is shaped and set. Shaping preferably takes place by pressing.
  • Products that may be produced from the wood composite material according to the invention are particle boards for building purposes, details for car industry, hat- racks, toilet covers and wood plugs.
  • the start material was 70 weight-% dried wood powder and 30 weight-% powder paint based on thermoset resin.
  • Powder paint based on thermoset resin comprises a binder and a setting agent, in this case a common commercial polyester product from the paint manufacturer Jotun (Corro-CoatTM) was used.
  • the wood powder was a mixture of spruce and pine and the particle size was ⁇ 0,4 mm.
  • the manufacture took place in tools of aluminum with a cylindrical and a rectangular cavity. From the powder amounts 6,7 and 100 g respectively boards with a diameter of 40 mm and the thickness 4 mm and 250 x 50 x 6 mm (L x B x H) respecively were made.
  • the tool was treated with a release agent (Lagomat) so that the boards would not stick therein.
  • the tool was heated up to 180 °C, and then the cavity was filled with the powder mixture.
  • the powder mixture was pressed to a board in a press in which the heating plates had a temperature of 180 °C. While the powder mixture was pressed together, molten and finally set, the pressing pressure was gradually adjusted.
  • the parameters used at the manufacture of the cylindrical board and the properties obtained are disclosed in the table below.
  • the properties obtained are comparable with those of a hard plywood plate.
  • the material according to the invention can however be manufactured at a considerably lower cost.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Sustainable Development (AREA)
  • Materials Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

A composite material containing at lest 50 weight-% wood material in the form of wood particles such as powder, chips or fibers and no more than 50 weight-% powder paint, preferably in the form of residual material from spray painting, powder paint manufacture or the like, said powder paint as a main component containing thermoset resin and which acts as a binder between the wood particles.

Description

Wood composite material and t»< nutfct.Λure thereof
Technical field
The present invention refers to a wood composite material in which residual material is used for the production of a material that is useful in many applications. The invention further refers to a method for the production of said material.
Background of the invention
There is today an extensive production of wood composite products, like particle boards and the like. These are made by mixing wood powder with glue. The glue can be of thermoplastic or thermoset plastic type. The glue represents an essential part of the cost for the composite material. The glue cost for a thermoset glue is today about 18 SEK per kg glue.
The spray painting industry has today to a great extent changed from wet paint to powder paint. The binder in such paint is a thermoset plastic. The binder may for example be an epox -, polyester- or acrylic resin. Both in the manufacture and use of powder paint a certain amount of residual material is obtained. One has to get rid of this residual material in some way. Today powder remaining from the powder paint industry is left for incineration or is set and then deposited. The cost for getting rid of the residual material is today about 5 SEK per kilo. However within a near future restrictions against deposition are awaited.
Through WO 96/15891 it is known to reuse powder paint, wherein this is pressed to tablets, which are used in powder spraying procedures.
Through JP 10-330536 it is known to produce an injection moulded product by using excess powder from the spray painting industry. A filler in the form of small partcles of inorganic material, such as kaolin, is added to the powder paint. The content of powder paint in the examples is from 67% and more.
The object and most important features of the invention The object of the present invention is to provide a wood composite material in which the main component is wood particles such as powder, chips or fibers, which are bonded together with a binder and can be made in a cost efficient way. This has according to the invention been solved by the fact that the material contains at least 50% by weight wood material in the form of wood particles such as powder, chips or fibers and mo more than 50% by weight of powder paint, which as a main component contains thermoset resin and which acts as a binder between the wood particles.
For economical reasons powder paint mainly in the form of residual material from spray painting, powder paint manufacture or the like are intended to be used.
The final material contains preferably at least 60 % by weight and preferably at least 75 % by weight wood material.
Besides wood material and powder paint a binder in which the powder paint is distributed can be contained. The binder can be a thermoset resin, which is set together with the powder paint.
The invention further refers to a method for the manufacture of a composite material, wherein at least 50% by weight of wood material in the form of wood particles such as powder, chips or fibers and no more than 50% by weight powder paint, which as a main component contains a thermoset resin, are mixed, the mixture being heated and then shaped and set.
Description of the invention
The wood composite material according to the invention contains as a main component wood particles in the form of powder, chips or fibers, which have been bonded together with a binder. The amount of wood material should be at least 50, preferably at least 60 and more preferably at least 75% by weight. The wood particles are mainly residual products from the wood industry.
Powder paint is used as binder, said powder paint as a main component containing a thermoset resin. The powder paint can at least to a substantial extent contain a residual powder coming from spray painting and from the production of powder paint. When applying and manufacturing powder paint a certain amount therefore will be obtained as a residual material, which today is incinerated or alternatively is set and deposited. This residual material is according to the invention used as a binder between wood particles, for the manufacture of a wood composite material similar to the ones that today are manufactured by mixing the wood particles with glue in the form of a thermoset resin glues or a thermoplastic glue. The powder paint/lacquer is thus used for replacing this glue. The powder paint/lacquer may of course partly of wholly also consist of first-class product, i.e. non-residual powder.
The powder paint/lacquer is optionally mixed with a liquid material, such as an additional glue, on one hand for avoiding dusting and on the other hand for making the powder to distribute better between the wood particles. The liquid material can be a thermoset glue, which sets together with the powder paint/lacquer. Examples of such thermoset glues are phenol-, epoxy-, polyester- and acrylic glues.
Further additives that may be contained in the material are for example pigment, further binders, fillers, release agents, flame guards.
The wood composite material according to the invention are produced by mixing the wood particles, which may vary in size from powder to coarse chips, with the powder paint, which optionally is mixed with a liquid material, as mentioned above. The mixture is then heated to a suitable setting temperature, usually 130-180°C, is shaped and set. Shaping preferably takes place by pressing.
Products that may be produced from the wood composite material according to the invention are particle boards for building purposes, details for car industry, hat- racks, toilet covers and wood plugs.
Examples
The examples below disclose manufacturing of cylindrical test bodies and boards according to this invention.
The start material was 70 weight-% dried wood powder and 30 weight-% powder paint based on thermoset resin. Powder paint based on thermoset resin comprises a binder and a setting agent, in this case a common commercial polyester product from the paint manufacturer Jotun (Corro-Coat™) was used. The wood powder was a mixture of spruce and pine and the particle size was < 0,4 mm. The manufacture took place in tools of aluminum with a cylindrical and a rectangular cavity. From the powder amounts 6,7 and 100 g respectively boards with a diameter of 40 mm and the thickness 4 mm and 250 x 50 x 6 mm (L x B x H) respecively were made. The tool was treated with a release agent (Lagomat) so that the boards would not stick therein. The tool was heated up to 180 °C, and then the cavity was filled with the powder mixture. The powder mixture was pressed to a board in a press in which the heating plates had a temperature of 180 °C. While the powder mixture was pressed together, molten and finally set, the pressing pressure was gradually adjusted. The parameters used at the manufacture of the cylindrical board and the properties obtained are disclosed in the table below.
Wood powder 4,7 g
Powder paint 2 g
Degree of compression 6 times
Pressing pressure 80 bar
Pressing time 20 minutes
Setting temperature 180 °C
Density (ISO 2781) 1300 kg/m3
Elasticity module (ISO 178) 5400 Mpa
Bending strength (ISO 178) 60 Mpa
Break elongation (ISO 178) 1,11
The properties obtained are comparable with those of a hard plywood plate. The material according to the invention can however be manufactured at a considerably lower cost.

Claims

Claims
1. A composite material, characterized in that it contains at least 50 weight-% wood material in the form of wood particles such as powder, chips or fibers and no more than 50 weight-% powder paint, which as a main component contains thermoset resin and which acts as a binder between the wood particles.
2. A composite material as claimed in claim 1, characterized in that the powder paint at least to a substantial part is residual material from spray painting, powder paint manufacture or the like.
3. A composite material as claimed in claim 1 or 2, characterized in that it contains at least 60 weight-% , preferably at least 75 weight-% wood material.
4. A composite material as claimed in any of the preceding claims, characterized in that it besides wood material and powder paint also contains a binder in which the powder paint is distributed.
5. A composite material as claimed in claim 5, characterized in that the binder is a thermoset resin which has set together with the powder paint.
6. A method for the manufacture of a composite material as claimed in claim 1, characterized in mixing at least 50 weight-% wood material in the form of wood particles such as powder, chips and fibers and no more than 50 weight-% powder paint, which as a main component contains a thermoset resin, heating the mixture and then shaping and setting the mixture.
7. Method as claimed in claim 6, characterized in that the powder paint at least to a substantial part is residual material from spray painting, powder paint manufacture or the like.
PCT/SE2002/001072 2001-06-08 2002-06-04 Wood composite material and manufacture thereof WO2002100616A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102043-7 2001-06-08
SE0102043A SE0102043L (en) 2001-06-08 2001-06-08 Wood composite material and manufacture thereof

Publications (1)

Publication Number Publication Date
WO2002100616A1 true WO2002100616A1 (en) 2002-12-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004058465A1 (en) 2002-12-23 2004-07-15 IHD Institut für Holztechnologie Dresden gGmbH Combination material and method for the production thereof
DE102004008827A1 (en) * 2004-02-20 2005-09-08 IHD Institut für Holztechnologie Dresden gGmbH Plate, shaped component and cover layer consist of nonmeltable fiber and/or chip particles which contain lignocellulose, with added particles obtained from plastic waste and/or synthetic glue systems
WO2007079719A2 (en) * 2006-01-09 2007-07-19 Kurt Koryszczuk Moulded body consisting of powder paint residues that contain plastic, mineral lightweight aggregates and renewable raw materials and use thereof, in particular, in the construction and craft industry
WO2013079635A1 (en) * 2011-12-01 2013-06-06 Global Telecom Organisation S.A. Substrate binding process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51133338A (en) * 1975-05-16 1976-11-19 Joto Kagaku Kogyo Kk A method for mixing a large amount of filler with a thermoplastic resi n
US4738895A (en) * 1986-02-18 1988-04-19 Chisso Corporation Woody fiber mat
JPH06270110A (en) * 1993-03-18 1994-09-27 Hikari Sangyo:Yugen Manufacture of resin molded piece using wood flour
JPH08332611A (en) * 1995-06-07 1996-12-17 Dantani Plywood Co Ltd Particle board
DE10022008A1 (en) * 2000-05-05 2001-11-15 Agrolinz Melamin Gmbh Linz Moulding material based on wood particles and thermosetting prepolymer, used for applications in building and furniture, are obtained by reactive compounding with addition of water-soluble or water-dispersible polymer
JP3305054B2 (en) * 1993-08-25 2002-07-22 株式会社日阪製作所 Method for producing wood fiber molded body

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51133338A (en) * 1975-05-16 1976-11-19 Joto Kagaku Kogyo Kk A method for mixing a large amount of filler with a thermoplastic resi n
US4738895A (en) * 1986-02-18 1988-04-19 Chisso Corporation Woody fiber mat
JPH06270110A (en) * 1993-03-18 1994-09-27 Hikari Sangyo:Yugen Manufacture of resin molded piece using wood flour
JP3305054B2 (en) * 1993-08-25 2002-07-22 株式会社日阪製作所 Method for producing wood fiber molded body
JPH08332611A (en) * 1995-06-07 1996-12-17 Dantani Plywood Co Ltd Particle board
DE10022008A1 (en) * 2000-05-05 2001-11-15 Agrolinz Melamin Gmbh Linz Moulding material based on wood particles and thermosetting prepolymer, used for applications in building and furniture, are obtained by reactive compounding with addition of water-soluble or water-dispersible polymer

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197701, Derwent World Patents Index; AN 1977-01093Y, XP002963111 *
DATABASE WPI Week 199443, Derwent World Patents Index; AN 1994-346559, XP002963109 *
DATABASE WPI Week 199709, Derwent World Patents Index; AN 1997-094878, XP002963108 *
DATABASE WPI Week 200254, Derwent World Patents Index; AN 1995-136370, XP002963110 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004058465A1 (en) 2002-12-23 2004-07-15 IHD Institut für Holztechnologie Dresden gGmbH Combination material and method for the production thereof
DE102004008827A1 (en) * 2004-02-20 2005-09-08 IHD Institut für Holztechnologie Dresden gGmbH Plate, shaped component and cover layer consist of nonmeltable fiber and/or chip particles which contain lignocellulose, with added particles obtained from plastic waste and/or synthetic glue systems
WO2007079719A2 (en) * 2006-01-09 2007-07-19 Kurt Koryszczuk Moulded body consisting of powder paint residues that contain plastic, mineral lightweight aggregates and renewable raw materials and use thereof, in particular, in the construction and craft industry
WO2007079720A2 (en) * 2006-01-09 2007-07-19 Kurt Koryszczuk Method for transforming paint powder residues into moulded bodies for use in the construction industry
WO2007079719A3 (en) * 2006-01-09 2008-05-22 Kurt Koryszczuk Moulded body consisting of powder paint residues that contain plastic, mineral lightweight aggregates and renewable raw materials and use thereof, in particular, in the construction and craft industry
WO2007079720A3 (en) * 2006-01-09 2008-05-22 Kurt Koryszczuk Method for transforming paint powder residues into moulded bodies for use in the construction industry
WO2013079635A1 (en) * 2011-12-01 2013-06-06 Global Telecom Organisation S.A. Substrate binding process

Also Published As

Publication number Publication date
SE0102043L (en) 2002-12-09
SE0102043D0 (en) 2001-06-08

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