GB2248246A - Reinforced fiberboard - Google Patents
Reinforced fiberboard Download PDFInfo
- Publication number
- GB2248246A GB2248246A GB9020141A GB9020141A GB2248246A GB 2248246 A GB2248246 A GB 2248246A GB 9020141 A GB9020141 A GB 9020141A GB 9020141 A GB9020141 A GB 9020141A GB 2248246 A GB2248246 A GB 2248246A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mdf
- reinforcing material
- medium density
- density fibreboard
- reinforced
- 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.)
- Withdrawn
Links
- 239000011094 fiberboard Substances 0.000 title 1
- 239000012779 reinforcing material Substances 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 2
- 229920002522 Wood fibre Polymers 0.000 abstract description 4
- 229920001807 Urea-formaldehyde Polymers 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000003365 glass fiber Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009950 felting Methods 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
-
- 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
-
- 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
- B27N5/00—Manufacture of non-flat articles
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)
Abstract
Medium density fibreboard (MDF) is internally reinforced by a reinforcing material. Reinforcing material, which may comprise for example metal, glass fibre or carbon fibre in the form of wire, fibre, sheet, mesh, open web or matrix is incorporated within the matrix of wood fibres of the medium density fibreboard. There may be one or more reinforcing layers and they may be corrugated or stressed. The fibreboard may be prepared by the conventional process of Fig. 1 using urea formaldehyde resin. <IMAGE>
Description
REINFORCED MEDIUM DENSITY FIBREBOARD The present invention relates to medium density fibreboard. In particular, the invention relates to reinforced medium density fibreboard (MDF) suitable, for example, for use in the manufacture of articles of furniture or for use in the construction industry.
Medium density fibreboard has been known for many years as a relatively cheap and readily available alternative to solid wood in a wide variety of applications.
Medium density fibreboard is manufactured by compressing a mesh of wood fibres in the presence of a binding agent. MDF may be machined to a high quality finish, suitable for many domestic and industrial applications, without the need to provide a veneer or plastic film coating as required by low quality "chipboard" products.
However, MDF does have a severe limitation. It cannot withstand repeated impacts and fails by way of an unusual laminar separation. Studies directed at testing MDF in impact fatigue have demonstrated not only the unusual nature of the failure but importantly, have demonstrated that the variability of the failure does not enable workable safety limits to be established for the material.
There is, therefore, a need to provide a medium density fibreboard having improved and definable impact fatigue properties.
According to the present invention there is provided medium density fibreboard internally reinforced with a reinforcing material. Internal reinforcement of MDF not only confers improved impact fatigue properties but means that if failure of the fibreboard does occur, the failure is usually non-catastrophic, the disintegrated fibreboard being held together by-the reinforcing material.
The reinforcing material may comprise any suitable material, for example, metal, glass fibre or carbon fibre.
The reinforcing material may be present in the MDF as a wire, fibre, sheet, mesh, open web or matrix. The reinforcing material may be stressed. For example, the reinforcing material may be pre-stressed (tension applied prior to incorporation in the MDF) or post-stressed (tension applied to the reinforcing material after incorporation in the MDF). Tension may be applied to the reinforcing material during incorporation in the MDF. Stressing the reinforcing material is particularly advantageous in increasing the resistance of reinforced MDF to impact fatigue by reducing strain in the fibreboard.
The term "internally" is used to specify that the reinforcing material is incorporated within the matrix of wood fibres of the MDF. The present invention does not relate to provision of reinforcing material on the external surface of MDF, such as might be provided by a veneer or other surface coating.
It will be understood that the term medium density fibreboard is not limited to substantially planar sheets or boards of MDF but also includes three-dimensional configurations of the material.
Preferably, the MDF is internally reinforced by one or more layers of reinforcing material.
The layer or layers of reinforcing material may be substantially planar or may be corrugated. Each layer may comprise a sheet, mesh or open web.
Where there is more than one layer of reinforcing material the layers may be connected together, for example by fibres, wires or studs.
Preferably, the MDF comprises a substantially planar sheet internally reinforced by one or more layers of reinforcing material. The reinforcing layer or layers may be substantially parallel or substantially perpendicular to the plane of the sheet.
According to a further aspect of the present invention there is provided a household article comprising reinforced medium density fibreboard. The article may comprise any suitable article, such as furniture. However, it is a particular feature of the present invention that articles which are subject to impact stress and which are liable to impact fatigue failure if constructed of conventional unreinforced MDF, may be constructed from the reinforced MDF of the present invention. Such articles include, for example, table legs, chair legs, bed slats, ladders and floor boards.
According to a further aspect of the present invention there is provided a process for the manufacture of medium density fibreboard wherein reinforcing material is incorporated into the MDF. Reinforcing material may be incorporated into MDF at one or more stages in the manufacture of the MDF.
Medium density fibreboard in the form of a substantially planar sheet is conventionally manufactured (Figure 1) from softwoods and hardwoods in the form of roundwood, slabwood, forest thinnings and sawmill and factory residues. These are converted into chips with a typical dimension of 20 mm in a chipping machine.
Alternatively, supplies of chips cut from timber residues are obtained directly from sawmills.
The wood chips are screened by screening machine 1 to remove undersize material, typically less than 5 mm, and oversize material typically in excess of 40 mm.
The chips are then steamed for several minutes under pressure at a temperature of about 1600C and then forced into a narrow gap between rotating discs of a refiner 2.
Individual fibres or fibre bundles mechanically separated from the steam softened chips pass from the refiner to the dryer 3. Here, the wet fibres including some residual steam are combined with hot flue gases from a gas burner and the mixture passed at high velocity along a flash drying tube.
At the end of the tube, the dried fibres are separated from the steam and hot gases in a cyclone and stored in a bin which supplies the board forming machine. Resin is mixed with the dry fibres in a blender 4 just before a mat of the fibres is formed.
The fibres in boards for normal interior use are bonded with urea formaldehyde (UF) resin. Mixed ureamelamine, phenolic, iscocyanate or other resins can be used as binders for boards where improved properties such as increased resistance to moisture are required.
An alternative method of resin addition comprises a blowline addition process, in which the resin binder is mixed 5 with the wet fibres as they enter the drying tube 6.
The dried fibres within a well defined size range are deposited on a moving screen passing through a mat forming machine 7. A vacuum unit below the screen removes some of the air from the fibre mat as it forms and assists the felting of the fibres.
By contrast with particle board forming, the lightness of the wood fibres in relation to their large surface area prevents close packing of the mat particularly when manufacturing thicker boards. Under these conditions, improved forming of thicker boards can be achieved by laying thinner mats on the carrier screen and stacking two or more mats together to make up the required thickness prior to pressing.
Pressing equipment and conditions vary considerably from mill to mill but generally boards are pressed in two stages.
The fibre mat is first consolidated by prepressing in a prepress 8 between continuous steel bands wrapped round heavy duty steel rollers positioned to form a nip of decreasing thickness. The mat with its thickness approximately halved, may be edge and length trimmed before passing to the main hydraulic press 9 which may be position or pressure controlled. Most MDF mills have single opening or multidaylight presses operating with the board stationary during pressing but continuous presses are available. The high temperatures and pressures required for the manufacture of MDF are applied by steam or oil heated platens or by radio frequency (RF) heating operating generally in one of the following systems: a) heated platen press b) heated platen press combined with radio frequency
electrodes c) radio frequency prepress followed by heated platen
press.
The desirable features of high definition edge moulding and surface profiling of MDF depends upon a uniform density gradient across the thickness of the board.
The boards emerging from the press at high temperature are allowed to cool with both surfaces exposed to the air in a cooling unit 10. The surfaces of the cooled boards are then sanded to remove any weakly bonded fibres caused by resin precure in the press and to bring the board to the required thickness.
The resulting boards are finish sanded with 100 or 120 grit to achieve a thickness tolerance generally within +0.2.mm for boards up to 22 mm thickness and +0.3mm for boards up to 22 mm thickness. A wide range of board sizes and cut size panels may be produced. In addition the boards themselves can be moulded, and can be successfully joined, jointed or layered by adhesives, with and without heat.
In a process of the present invention reinforcing material may be incorporated in MDF at one or more stages in the manufacture of the MDF. For example, reinforcing material may be incorporated into the MDF during formation of the fibre mat; reinforcing material may be incorporated into the MDF by being interleaved between two or more layers of fibre mat prior to pre-pressing; reinforcing material may be incorporated into the MDF by being interleaved between two or more layers of consolidated fibre mat prior to pressing.
In an alternative process MDF may be moulded around a matrix of reinforcing material.
The process of the present invention may comprise a step of stressing the reinforcing material. The reinforcing material may be stressed before, during or after incorporated of the reinforcing material into MDF.
The present invention will now be described by way of example with reference to the drawings in which:
Figure 1 is a schematic diagram representing a conventional process for the preparation of a sheet of MDF;
Figure 2 is a schematic perspective view of a first embodiment of the present invention;
Figure 3 is a schematic perspective view of a second embodiment of the present invention;
Figure 4 is a schematic perspective view of a third embodiment of the present invention; and
Figure 5 is a schematic perspective view of a fourth embodiment of the present invention.
In a first embodiment of the present invention (Figure 2) there is provided a sheet 12 of MDF internally reinforced by a corrugated layer of reinforcing material 14. The plane of the later of reinforcing material is parallel to the plane of the sheet of MDF.
In a second embodiment of the present invention (Figure 3) there is provided a sheet 16 of MDF internally reinforced by an open mesh of reinforcing material 18 corrugated perpendicular to the plane of the sheet of MDF.
In a third embodiment of the present invention (Figure 4) there is provided a sheet 20 of MDF internally reinforced by two co-planar meshes of reinforcing material 22.
Optionally the layers of reinforcing material are tied by wire or studs.
In a fourth embodiment of the present invention (Figure 5)there is provided a chair leg 24 comprising MDF 26 moulded around a matrix of wires 28. Optionally the wires may be pre- or post-stressed.
It will be appreciated that the present invention is described by way of example only and modifications of detail may be made within the scope of the invention.
Claims (13)
1. Medium density fibreboard (MDF) internally reinforced by a reinforcing material.
2. Medium density fibreboard according to claim 1 wherein the MDF is internally reinforced by one or more layers of reinforcing material.
3. Medium density fibreboard according to claim 2 comprising a substantially planar sheet of MDF wherein the plane of the or each layer or reinforcing material is substantially parallel to the plane of the sheet of MDF.
4. Medium density fibreboard according to claim 3 comprising more than one layer of reinforcing material, each layer being connected together.
5. Medium density fibreboard according to claim 1 wherein the MDF is moulded around a matrix of reinforcing material.
6. Medium density fibreboard according to any of preceding claims wherein the reinforcing material is stressed.
7. A household article comprising reinforced medium density fibreboard according to any one of claims 1 to 6.
8. A process for the manufacture of medium density fibreboard (MDF) wherein reinforcing material is incorporated into the MDF.
9. A process according to claim 8 comprising a step of incorporating reinforcing material in a fibre mat used in the manufacture of the MDF.
10. A process according to claim 8 or 9 comprising a step of interleaving reinforcing material between two or more fibre mats used in the manufacture of the MDF.
11. A process according to any one of claims 8 to 10 comprising a step of interleaving reinforcing material between two or more consolidated fibre mats used in the manufacture of the MDF.
12. A process according to any one of claim 8 comprising a step of moulding MDF around a matrix of reinforcing material.
13. Reinforced density fibreboard as hereinbefore described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9020141A GB2248246A (en) | 1990-09-14 | 1990-09-14 | Reinforced fiberboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9020141A GB2248246A (en) | 1990-09-14 | 1990-09-14 | Reinforced fiberboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9020141D0 GB9020141D0 (en) | 1990-10-24 |
| GB2248246A true GB2248246A (en) | 1992-04-01 |
Family
ID=10682221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9020141A Withdrawn GB2248246A (en) | 1990-09-14 | 1990-09-14 | Reinforced fiberboard |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2248246A (en) |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5520777A (en) * | 1994-02-28 | 1996-05-28 | Midnorth Forest Industry Alliance Inc. | Method of manufacturing fiberboard and fiberboard produced thereby |
| WO2001081056A1 (en) | 2000-04-27 | 2001-11-01 | Mura Imre Jr | Reinforced particle board and method for manufacturing thereof |
| WO2004106632A1 (en) * | 2003-05-21 | 2004-12-09 | Masonite Corporation | Refiner steam separation system for reduction of dryer emissions |
| WO2005087467A1 (en) * | 2004-03-14 | 2005-09-22 | Horst Korger | Three-dimensional structure consisting of natural fibers in the form of matting, panels, hollow bodies, molded parts or the like. |
| EP1623807A1 (en) * | 2004-08-06 | 2006-02-08 | Fritz Egger GmbH & Co | Method and device for producing a wood-based object |
| US20120264853A1 (en) * | 2011-04-12 | 2012-10-18 | Ceraloc Innovation Belgium Bvba | Method of manufacturing a layer |
| EP1968775A4 (en) * | 2005-12-22 | 2012-11-14 | New Zealand Forest Res Inst Ltd | PROCESS FOR THE PRODUCTION OF COMPOSITE WOOD FIBER PRODUCTS |
| US8784587B2 (en) | 2010-01-15 | 2014-07-22 | Valinge Innovation Ab | Fibre based panels with a decorative wear resistance surface |
| US8920876B2 (en) | 2012-03-19 | 2014-12-30 | Valinge Innovation Ab | Method for producing a building panel |
| US8920874B2 (en) | 2010-01-15 | 2014-12-30 | Valinge Innovation Ab | Method of manufacturing a surface layer of building panels |
| US9085905B2 (en) | 2011-04-12 | 2015-07-21 | Valinge Innovation Ab | Powder based balancing layer |
| US9181698B2 (en) | 2013-01-11 | 2015-11-10 | Valinge Innovation Ab | Method of producing a building panel and a building panel |
| US9255405B2 (en) | 2008-04-07 | 2016-02-09 | Valinge Innovation Ab | Wood fibre based panels with a thin surface layer |
| US9296191B2 (en) | 2010-04-13 | 2016-03-29 | Valinge Innovation Ab | Powder overlay |
| US9410319B2 (en) | 2010-01-15 | 2016-08-09 | Valinge Innovation Ab | Heat and pressure generated design |
| US9556622B2 (en) | 2007-11-19 | 2017-01-31 | Valinge Innovation Ab | Fibre based panels with a wear resistance surface |
| US10017950B2 (en) | 2011-08-26 | 2018-07-10 | Ceraloc Innovation Ab | Panel coating |
| US10100535B2 (en) | 2014-01-10 | 2018-10-16 | Valinge Innovation Ab | Wood fibre based panel with a surface layer |
| RU2685010C1 (en) * | 2018-04-28 | 2019-04-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный университет путей сообщения" (УрГУПС) | Composite material for construction |
| US10286633B2 (en) | 2014-05-12 | 2019-05-14 | Valinge Innovation Ab | Method of producing a veneered element and such a veneered element |
| US10315219B2 (en) | 2010-05-31 | 2019-06-11 | Valinge Innovation Ab | Method of manufacturing a panel |
| US10442152B2 (en) | 2013-11-27 | 2019-10-15 | Valinge Innovation Ab | Floorboard |
| US10442164B2 (en) | 2013-11-27 | 2019-10-15 | Valinge Innovation Ab | Floor, wall, or ceiling panel and method for producing same |
| US10513094B2 (en) | 2013-10-18 | 2019-12-24 | Valinge Innovation Ab | Method of manufacturing a building panel |
| US10828881B2 (en) | 2016-04-25 | 2020-11-10 | Valinge Innovation Ab | Veneered element and method of producing such a veneered element |
| US10913176B2 (en) | 2013-07-02 | 2021-02-09 | Valinge Innovation Ab | Method of manufacturing a building panel and a building panel |
| US10981362B2 (en) | 2018-01-11 | 2021-04-20 | Valinge Innovation Ab | Method to produce a veneered element |
| US11046063B2 (en) | 2011-04-12 | 2021-06-29 | Valinge Innovation Ab | Powder based balancing layer |
| US11072156B2 (en) | 2013-11-27 | 2021-07-27 | Valinge Innovation Ab | Method for producing a floorboard |
| US11167533B2 (en) | 2018-01-11 | 2021-11-09 | Valinge Innovation Ab | Method to produce a veneered element and a veneered element |
| US11235565B2 (en) | 2008-04-07 | 2022-02-01 | Valinge Innovation Ab | Wood fibre based panels with a thin surface layer |
| US11313123B2 (en) | 2015-06-16 | 2022-04-26 | Valinge Innovation Ab | Method of forming a building panel or surface element and such a building panel and surface element |
| US11597187B2 (en) | 2019-01-09 | 2023-03-07 | Valinge Innovation Ab | Method to produce a veneer element and a veneer element |
| US12275218B2 (en) | 2019-01-10 | 2025-04-15 | Välinge Innovation AB | Method of manufacturing a building element and a building element |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB157429A (en) * | 1914-01-10 | 1922-05-10 | Armin Renyi | Improved building material suitable for use as a wood substitute |
| GB761229A (en) * | 1951-03-19 | 1956-11-14 | Henri Georges Roy | Improvements in artificial lumber products |
| GB1529363A (en) * | 1974-10-30 | 1978-10-18 | Durisol Ag | Building panel |
| GB2000821A (en) * | 1977-07-05 | 1979-01-17 | Kiss Consulting Eng | Fibre mats |
| WO1982001849A1 (en) * | 1980-12-05 | 1982-06-10 | Lars Hammarberg | Reinforced wood particle board and a method of producing it |
| GB2175930A (en) * | 1985-05-30 | 1986-12-10 | Composite Dev Ltd | Reinforced resinous material |
-
1990
- 1990-09-14 GB GB9020141A patent/GB2248246A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB157429A (en) * | 1914-01-10 | 1922-05-10 | Armin Renyi | Improved building material suitable for use as a wood substitute |
| GB761229A (en) * | 1951-03-19 | 1956-11-14 | Henri Georges Roy | Improvements in artificial lumber products |
| GB1529363A (en) * | 1974-10-30 | 1978-10-18 | Durisol Ag | Building panel |
| GB2000821A (en) * | 1977-07-05 | 1979-01-17 | Kiss Consulting Eng | Fibre mats |
| WO1982001849A1 (en) * | 1980-12-05 | 1982-06-10 | Lars Hammarberg | Reinforced wood particle board and a method of producing it |
| GB2175930A (en) * | 1985-05-30 | 1986-12-10 | Composite Dev Ltd | Reinforced resinous material |
Cited By (62)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5520777A (en) * | 1994-02-28 | 1996-05-28 | Midnorth Forest Industry Alliance Inc. | Method of manufacturing fiberboard and fiberboard produced thereby |
| WO2001081056A1 (en) | 2000-04-27 | 2001-11-01 | Mura Imre Jr | Reinforced particle board and method for manufacturing thereof |
| WO2004106632A1 (en) * | 2003-05-21 | 2004-12-09 | Masonite Corporation | Refiner steam separation system for reduction of dryer emissions |
| US7368037B2 (en) | 2003-05-21 | 2008-05-06 | Masonite Corporation | Refiner steam separation system for reduction of dryer emissions |
| WO2005087467A1 (en) * | 2004-03-14 | 2005-09-22 | Horst Korger | Three-dimensional structure consisting of natural fibers in the form of matting, panels, hollow bodies, molded parts or the like. |
| EP1623807A1 (en) * | 2004-08-06 | 2006-02-08 | Fritz Egger GmbH & Co | Method and device for producing a wood-based object |
| EP1968775A4 (en) * | 2005-12-22 | 2012-11-14 | New Zealand Forest Res Inst Ltd | PROCESS FOR THE PRODUCTION OF COMPOSITE WOOD FIBER PRODUCTS |
| US9783996B2 (en) | 2007-11-19 | 2017-10-10 | Valinge Innovation Ab | Fibre based panels with a wear resistance surface |
| US9556622B2 (en) | 2007-11-19 | 2017-01-31 | Valinge Innovation Ab | Fibre based panels with a wear resistance surface |
| US9255405B2 (en) | 2008-04-07 | 2016-02-09 | Valinge Innovation Ab | Wood fibre based panels with a thin surface layer |
| US11235565B2 (en) | 2008-04-07 | 2022-02-01 | Valinge Innovation Ab | Wood fibre based panels with a thin surface layer |
| US8784587B2 (en) | 2010-01-15 | 2014-07-22 | Valinge Innovation Ab | Fibre based panels with a decorative wear resistance surface |
| US11401718B2 (en) | 2010-01-15 | 2022-08-02 | Valinge Innovation Ab | Bright coloured surface layer |
| US9410319B2 (en) | 2010-01-15 | 2016-08-09 | Valinge Innovation Ab | Heat and pressure generated design |
| US8920874B2 (en) | 2010-01-15 | 2014-12-30 | Valinge Innovation Ab | Method of manufacturing a surface layer of building panels |
| US10344379B2 (en) | 2010-04-13 | 2019-07-09 | Valinge Innovation Ab | Powder overlay |
| US9296191B2 (en) | 2010-04-13 | 2016-03-29 | Valinge Innovation Ab | Powder overlay |
| US10315219B2 (en) | 2010-05-31 | 2019-06-11 | Valinge Innovation Ab | Method of manufacturing a panel |
| US11040371B2 (en) | 2010-05-31 | 2021-06-22 | Valinge Innovation Ab | Production method |
| US11633884B2 (en) | 2011-04-12 | 2023-04-25 | Valinge Innovation Ab | Method of manufacturing a layer |
| US12179392B2 (en) | 2011-04-12 | 2024-12-31 | Välinge Innovation AB | Method of manufacturing a layer |
| US10214913B2 (en) | 2011-04-12 | 2019-02-26 | Valinge Innovation Ab | Powder based balancing layer |
| US11046063B2 (en) | 2011-04-12 | 2021-06-29 | Valinge Innovation Ab | Powder based balancing layer |
| US9352499B2 (en) * | 2011-04-12 | 2016-05-31 | Valinge Innovation Ab | Method of manufacturing a layer |
| US20120264853A1 (en) * | 2011-04-12 | 2012-10-18 | Ceraloc Innovation Belgium Bvba | Method of manufacturing a layer |
| US9085905B2 (en) | 2011-04-12 | 2015-07-21 | Valinge Innovation Ab | Powder based balancing layer |
| US11566431B2 (en) | 2011-08-26 | 2023-01-31 | Ceraloc Innovation Ab | Panel coating |
| US10017950B2 (en) | 2011-08-26 | 2018-07-10 | Ceraloc Innovation Ab | Panel coating |
| US8920876B2 (en) | 2012-03-19 | 2014-12-30 | Valinge Innovation Ab | Method for producing a building panel |
| US9403286B2 (en) | 2012-03-19 | 2016-08-02 | Valinge Innovation Ab | Method for producing a building panel |
| US10493729B2 (en) | 2013-01-11 | 2019-12-03 | Valinge Innovation Ab | Method of producing a building panel and a building panel |
| US9181698B2 (en) | 2013-01-11 | 2015-11-10 | Valinge Innovation Ab | Method of producing a building panel and a building panel |
| US11135814B2 (en) | 2013-01-11 | 2021-10-05 | Valinge Innovation Ab | Method of producing a building panel and a building panel |
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| US11313123B2 (en) | 2015-06-16 | 2022-04-26 | Valinge Innovation Ab | Method of forming a building panel or surface element and such a building panel and surface element |
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| RU2685010C1 (en) * | 2018-04-28 | 2019-04-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный университет путей сообщения" (УрГУПС) | Composite material for construction |
| US11975508B2 (en) | 2019-01-09 | 2024-05-07 | Välinge Innovation AB | Method to produce a veneer element and a veneer element |
| US11597187B2 (en) | 2019-01-09 | 2023-03-07 | Valinge Innovation Ab | Method to produce a veneer element and a veneer element |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB9020141D0 (en) | 1990-10-24 |
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