WO2009103849A1 - Coated wood board - Google Patents
Coated wood board Download PDFInfo
- Publication number
- WO2009103849A1 WO2009103849A1 PCT/FI2009/050132 FI2009050132W WO2009103849A1 WO 2009103849 A1 WO2009103849 A1 WO 2009103849A1 FI 2009050132 W FI2009050132 W FI 2009050132W WO 2009103849 A1 WO2009103849 A1 WO 2009103849A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wood board
- cross
- board according
- coating material
- polyolefin
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- 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
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
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- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
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- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/108—Rockwool fibres
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- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
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- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/702—Amorphous
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/704—Crystalline
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
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- 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
- B32B2419/00—Buildings or parts thereof
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- 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
- B32B2471/00—Floor coverings
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- 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
- B32B2605/00—Vehicles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31634—Next to cellulosic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/3188—Next to cellulosic
- Y10T428/31895—Paper or wood
- Y10T428/31899—Addition polymer of hydrocarbon[s] only
- Y10T428/31902—Monoethylenically unsaturated
Definitions
- the invention relates to a coated wood board as defined in the preamble of claim 1.
- Coatings used for wood products are normally some organic polymers, very often resins like phenolic resins and melamine resins. Thermoplastic coatings are also used, but the problem with them is how to adhere them to wood panels or products. Polymer priming is one method with the use of hot-melt glues.
- maleated polyethylene MAPP
- maleated polypropylene MAPP
- cellulose fibers can be surface modified with polypropylene-maleic anhydride copolymer.
- the film comprises in one embodiment maleic anhydride grafted ethyl-vinyl acetate co-polymer
- the spinning test is used to identity surface resistance against melting, when a wheel is accurately rotating in one place, over a short period of time, thus simulating a real life situation of, for example a pallet truck carrying high load and turned within a limited space. Passing such spinning tests requires that surface melting should not happen and passing the rolling test requires that the surface layers underneath are jointly flexible enough to withstand many cycles of local rolling pressure.
- the objective of the invention is to disclose a new type of a coated wood board.
- the invention aims to solve coating of the wood board with a complete new and very simple way.
- a coated wood board according to the invention are characterized by what is presented in the claims .
- the invention is based on a coated wood board, in which the wood board is coated by a coating material.
- the wood board is formed so that the veneers of the wood board are joined together.
- the coating material is formed of polyolefin film, and the polyolefin film is at least partially is cross-linked so that the percentage of cross-linking is 10 - 60 % bigger than the polyolefin amorphous percentage for pinning two phases, crystalline and amorphous, together for forming a wear and heat resistant coating. If cross-linking is too high, the material will become brittle; however, if it is too low the material will still melt under wearing/stressing conditions.
- the invention is specifically based on the heat and wear resistant wood board having the near similar surface hardness than birch wood plywood.
- the coating is based on the hard wood coating.
- a wood board refers to any wood panel product, plywood product, composite product, particle board, fiberboard, beam, pressed panel product or the like, formed of a number of veneers and principally of wood-based materials, in which the veneers are laid one upon the other and glued together.
- a wood board refers to any wood product or fiber product.
- a veneer refers to any layer of material, typically a thin layer of material.
- the wood board is plywood.
- a wood board according to the invention can comprise veneer layers of different thickness. The thicknesses of the veneer layers can vary. The veneer layers can be arranged in the desired position, i.e. crosswise or lengthwise in the desired order.
- the polyolefin film comprises at least two layers and at least top layer which is the first layer is cross- linked.
- At least one additive layer is arranged between the first and second layers.
- the film can comprises more than one additive layers e.g. 2 - 10 additive layers.
- the additive layers can contain functional additive.
- the additive layer can contain, for example, fire retardants, UV-stabilisers and fillers.
- the polyolefin film is at least partially cross-linked.
- the first layer is at least partially cross-linked.
- the second layer is at least partially cross-linked.
- the polyolefin film is cross-linked by a method selected from group: silane moisture method, electron beam (EB) radiation and their combinations.
- the cross-linking can be made during the polyolefin film preparation or before the film is pressed onto the wood board.
- a cross-linking agent is used during the cross-linking.
- the cross-linking time depends on the thickness of the coating, relative humidity, temperature and diffusion constants of the polyolefin material .
- the radiation dose is between 100 - 200 kGy, preferably 125 - 175 kGy, in radiation of the cross-linking.
- the cross- linking density of the polyolefin film is 50 - 70 %, in one preferable embodiment 55 - 67 %.
- the coating material is prepared by a catalyst.
- the catalyst is added to the silane grafted polyolefin.
- the catalyst is added to the silane grafted polyolefin prior to extrusion to accelerate the cross-linking reaction.
- the coating material can be prepared by using catalysts known per se .
- polyolefin is selected from group: polyethylene, polypropylene and their combinations. In a preferable embodiment the polyolefin is polyethylene.
- the polyolefin film or each layer can include additives and fillers. In one embodiment the polyolefin film can contain filler of 0 - 40 % by volume.
- the polyolefin film and/or the film layers can be made from petrochemical and renewable feedstock materials.
- bio-based polymers can be used.
- the bio-based polymers have processing temperature over 180 0 C or over 190 0 C.
- all film layers are substantially formed of the same material.
- at least one film layer is formed of a different material than the other films layers.
- Compatibilisers can be added to the film in order to adhere the dissimilar polymers to each other.
- the coating material comprises additives selected from group: reinforcement fibers, like glass-rock wool, carbon fibers, mineral particles, mineral fibers, glass fibers, quarts, aluminum oxides, UV protector and their combinations.
- the coating material contains additives up to 30 % by volume.
- polyolefin film contains reactive groups with -OH groups of the wood for forming a self-adhesive coating material and for forming covalent bonds between the wood board and polyolefin film.
- the polyolefin film is a self- adhesive by means of the reactive groups.
- the polyolefin film contains maleated polyolefin which contains maleic anhydride reactive groups. In one embodiment the polyolefin film contains iso-cyanate grafted polyolefin which contains reactive groups.
- At least the second layer nearest the surface of the wood board is a self- adhesive layer so that it contains reactive groups with -OH groups of the wood.
- the reactive groups of the polyolefin film is activated at temperatures of more than 180 0 C, in one embodiment at temperatures of more than 190 0 C, during the manufacturing of the self- adhesive material. In one embodiment, the sufficient time for activation is about 0.5 - 3 minutes. Then the film formed contains activated functional groups capable of forming the maximum number of covalent bonds with wood.
- the polyolefin films can be adhered directly to the wood when the film is maleated at least on one side and especially when the maleated layer is treated so that its temperature during manufacturing has been over 190 0 C, so that maleic acid is converted to maleic anhydride on the films surface.
- Maleic anhydride is very reactive with wood, forming a covalent bond with celluloses -OH groups. Without this activation, normal maleated film forms only hydrogen bonds, which are much weaker than covalent chemical bonds. So we also can bond polyolefin film directly to wood surface without any priming and joining layers.
- At least one polyolefin film layer contains maleic anhydride polyolefin.
- the film or the film layer which includes maleated polyolefin also contains polymer e.g. polyethylene or polypropylene.
- the film layer including maleated polyolefin essentially consists of MAPE+PE or MAPP+PP.
- maleated polyolefin contains maleic acid 0.3 - 15 % by weight of the maleated polyolefin, in one embodiment 1 - 5 % by weight of the maleated polyolefin.
- the film layer is maleated to the desired degree in order to improve friction and wetting properties of the coating material.
- a catalyst is used in polyolefin film manufacturing.
- the catalyst increases the frequency of the covalent bonds formed between coupling agent, e.g. maleic anhydride, and wood.
- the polyolefin film can be prepared by using catalysts known per se.
- the thickness of the coating may vary depending on the properties of the film materials and the application of the wood board. In one embodiment the polyolefin film has thickness between 1.5 - 3.0 mm, in one preferable embodiment is about 2.0 - 2.5 mm.
- the coating material can be prepared by using apparatuses and methods known per se, e.g. by extrusion or by co-extrusion.
- the wood board can be made by using apparatuses and methods known per se. Laying the veneers one upon the other, joining them together and other typical steps in making the wood board can be performed in any manner known per se in the art.
- the coating can be arranged onto the wood board by using the hot pressing technique, extruder technique, film technique, roll application technique, cylinder application technique, coat and multi-layer coat application technique, all known per se, their combinations or a corresponding technique.
- the coating material is attached onto the wood board at temperatures of 120 - 170 0 C by hot-pressing.
- the self-adhesive coating material is attached onto the wood board by reactive groups.
- temperatures of only 120 - 140 0 C are needed to fix the coating onto the wood board surface.
- the hot- pressing conditions like temperature, pressure and time, depend on the wood type, e.g. spruce or birch, and polyolefin melting temperature.
- the coating material can be attached onto the wood board by gluing, e.g. by resin or glue .
- the invention provides a heat and wear resistant coating and high friction coating. Further, the invention provides a simple and cheap solution for coating.
- the wood board in accordance with the invention is suitable for various applications.
- the wood board can be used for applications, e.g. for floors, for floors in trucks or other transport vehicles and for heavy transport applications.
- Fig. 1 shows polyethylene crystalline and amorphous material and tie molecules
- Fig. 2 shows a coating material structure according to the invention.
- Figure 1 discloses polyethylene crystalline and amorphous material and tie molecules.
- the heat- resistance of PE can be improved dramatically by cross-linking despite the fact that the irradiated and silane cross-linked materials still exhibit a melting point as shown by differential scanning calorimetry (DSC) .
- DSC differential scanning calorimetry
- the coating displays the properties normally associated with a solid such that the material does not appear to soften turn into a molten liquid even at elevated temperatures of 300°C for short periods.
- similar treatment to polyamide 66 does not yield the same degree of heat-resistance. In fact the polyamide melts to liquid.
- the cross- linking process results in a microstructure in which the crystalline lamellae are effectively constrained by the cross-linked amorphous regions.
- the polymer still exhibits a melting point as shown by differential scanning calorimetry (DSC) , but a high degree of structural stability persists above the melting point because the uncross-linked, and previously crystalline lamellae, regions are effectively immobilised by the cross-linked amorphous layers.
- DSC differential scanning calorimetry
- the crystalline lamellae are often described as being chain-folded, the presence of chains that participate in the formation of a series of lamellae should not be ignored. If these tie- molecules are forced to cross-link with other chains in the amorphous regions of the polymer, further constrainment of the crystalline layers will result.
- the crystalline layers may indeed melt in the thermodynamic sense and form an amorphous liquid, the associated chains are unlikely to exhibit the expected level of mobility at these elevated temperatures; the chains will be effectively bound into both amorphous and crystalline layer by virtue of the nature of tie-molecules.
- the coupling of the above phenomena may explain why PE behaves as a solid at temperatures in excess of the observed melting point.
- a semi-crystalline polymer that has crystallised in a form which is predominantly chain folded e.g. polyamide 66
- a crystalline phase that has formed through random re-entry (Figure 1) of the chains into multiple crystalline lamellae will have a tendency to exhibit tie-molecules that when cross-linked will effectively bind the crystalline layers together and impart a high degree of heat-resistance post-melting so that the polymer will not melt during the spinning test.
- Figure 2 discloses a coating material structure of the invention.
- the coating material is formed of a polyethylene film which comprises three layers: first
- the first layer is a top layer (1)
- second layer is a bottom layer (2) nearest the surface of the wood board
- additive layer (3) is arranged between the first and second layers.
- the top (1) layer is formed of polyethylene which is cross-linked for forming a wear and heat resistant film layer.
- the bottom (2) layer is formed maleic anhydride polyethylene (MAPE) and polyethylene for forming a self-adhesive film layer.
- MAPE maleic anhydride polyethylene
- the additive layer (3) is sandwiched between the top layer (1) and the bottom layer (2) .
- the additive layer is formed of un-crosslinked polyethylene or polypropylene including additives and fillers, e.g. fire retardants.
- the coating and the plywood used in the tests can be prepared following.
- the three-layer coating film according with figure 2 is prepared of polyolefin, maleated polyolefin and additives and fillers by co-extruding.
- the film can be optionally attached to non-woven or woven material.
- Maleated polyolefin of the second layer contains maleic acid which is converted maleic anhydride at temperatures of more than 190 0 C during the manufacturing of the film.
- the first film layer is cross-linked by electron beam radiation.
- the layers of the film are joined together for forming the film.
- the formed film is cut to size and is arranged onto the plywood by hot pressing or by gluing.
- the hot pressing is made at temperatures of about 130 - 140 0 C, at pressure of about 1.8 N/mm 2 and by time of about 13 minutes.
- the gluing can be made by hot-glues, e.g. by polyurethane .
- a compatibiliser material is required in the coating to join the dissimilar materials.
- polyamide 66 100 ⁇ m + Phenol formaldehyde resin impregnated 80 g/m 2 kraft paper having PF resolic resin content 140 g/m 2 .
- the top layer is always a phenolic paper layer.
- hot-press temperature 120 - 135 0 C hot-pressing time 13 minutes
- hot-press pressure 1.8 MPa hot-press pressure
- the cross- linking density for coatings 1 and 2 is greater than the percentage amorphous material (16-24 %) . Also, there is no change in the percentage crystallinity and melting temperature. Therefore, there is no cross- linking of the crystalline part of the material. This supports the hypothesis that the polyethylene crystalline phase has formed through the random reentry of chains into multiple crystalline lamellae and the tie molecules are tied together restricting the overall mobility.
- melt flow index MFI
- the DSC results show a significant reduction in the melting point of the cross-linked polyamide 66 compared to uncross-linked polyamide 66.
- the melting temperature depression in the cross-linked sample may be attributed to a reduction in crystal size upon deposition of high-energy electrons.
- the cross-linking is still occurring predominantly in the amorphous phase; however, there is now also cross-linking and branching at the interface of the two regions which is the reason for the diminished crystallinity in the cross-linked sample.
- SC means slightly compressed, C means compressed, TC means totally compressed and NC means no change.
- SC means slightly compressed, C means compressed, TC means totally compressed and NC means no change.
- SC means slightly compressed, C means compressed, TC means totally compressed and NC means no change.
- a wood board according to the invention is suitable in its different embodiments for different types of applications.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Laminated Bodies (AREA)
- Floor Finish (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09712607.2A EP2250225A4 (en) | 2008-02-18 | 2009-02-18 | Coated wood board |
BRPI0907798-7A BRPI0907798A2 (en) | 2008-02-18 | 2009-02-18 | Coated wood plank |
US12/918,285 US20110045308A1 (en) | 2008-02-18 | 2009-02-18 | Coated wood board |
CN2009801055418A CN101945961A (en) | 2008-02-18 | 2009-02-18 | Coated wood board |
JP2010547208A JP2011515240A (en) | 2008-02-18 | 2009-02-18 | Coated wood board |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20085148A FI20085148A0 (en) | 2008-02-18 | 2008-02-18 | Durable and heat-resistant coating for wood-based products and process for making them |
FI20085148 | 2008-02-18 | ||
FI20085464 | 2008-05-16 | ||
FI20085464A FI20085464A0 (en) | 2008-05-16 | 2008-05-16 | Wear-resistant and heat-resistant coating for wood-based products and process for making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009103849A1 true WO2009103849A1 (en) | 2009-08-27 |
Family
ID=40985098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2009/050132 WO2009103849A1 (en) | 2008-02-18 | 2009-02-18 | Coated wood board |
Country Status (8)
Country | Link |
---|---|
US (1) | US20110045308A1 (en) |
EP (1) | EP2250225A4 (en) |
JP (1) | JP2011515240A (en) |
KR (1) | KR20100119571A (en) |
CN (1) | CN101945961A (en) |
BR (1) | BRPI0907798A2 (en) |
RU (1) | RU2010134488A (en) |
WO (1) | WO2009103849A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2523788A4 (en) * | 2010-01-13 | 2015-07-01 | Upm Kymmene Wood Oy | Method for injecting coating material onto surface of material article and method for manufacturing layered product and layered product |
EP3045279A1 (en) * | 2011-06-21 | 2016-07-20 | Flooring Technologies Ltd. | Method for manufacturing a composite wood board |
Families Citing this family (5)
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WO2017015789A1 (en) * | 2015-07-24 | 2017-02-02 | 新明(芦台)科技有限公司 | Environmentally-friendly light polypropylene composite floorboard and manufacturing method therefor |
WO2019036450A1 (en) | 2017-08-14 | 2019-02-21 | Gcp Applied Technologies Inc. | Integral weather barrier panels |
CN108440837A (en) * | 2018-03-20 | 2018-08-24 | 福建师范大学福清分校 | A kind of film and preparation method thereof for formaldehydeless rigid environment-friendly wood floor |
CN108467530A (en) * | 2018-03-20 | 2018-08-31 | 福建师范大学福清分校 | A kind of film and preparation method thereof for formaldehydeless environment-friendly wood floor |
CN108577179A (en) * | 2018-04-25 | 2018-09-28 | 连云港科拓信息科技有限公司 | A kind of wear-resisting type quartz table top |
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- 2009-02-18 US US12/918,285 patent/US20110045308A1/en not_active Abandoned
- 2009-02-18 WO PCT/FI2009/050132 patent/WO2009103849A1/en active Application Filing
- 2009-02-18 EP EP09712607.2A patent/EP2250225A4/en not_active Withdrawn
- 2009-02-18 KR KR1020107020758A patent/KR20100119571A/en not_active Application Discontinuation
- 2009-02-18 CN CN2009801055418A patent/CN101945961A/en active Pending
- 2009-02-18 BR BRPI0907798-7A patent/BRPI0907798A2/en not_active IP Right Cessation
- 2009-02-18 RU RU2010134488/05A patent/RU2010134488A/en not_active Application Discontinuation
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Cited By (3)
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---|---|---|---|---|
EP2523788A4 (en) * | 2010-01-13 | 2015-07-01 | Upm Kymmene Wood Oy | Method for injecting coating material onto surface of material article and method for manufacturing layered product and layered product |
EP3045279A1 (en) * | 2011-06-21 | 2016-07-20 | Flooring Technologies Ltd. | Method for manufacturing a composite wood board |
EP2628580B1 (en) * | 2011-06-21 | 2017-04-12 | Flooring Technologies Ltd. | Composite wood board |
Also Published As
Publication number | Publication date |
---|---|
RU2010134488A (en) | 2012-03-27 |
BRPI0907798A2 (en) | 2015-07-14 |
CN101945961A (en) | 2011-01-12 |
KR20100119571A (en) | 2010-11-09 |
EP2250225A1 (en) | 2010-11-17 |
JP2011515240A (en) | 2011-05-19 |
EP2250225A4 (en) | 2013-05-15 |
US20110045308A1 (en) | 2011-02-24 |
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