• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    POWDER COATING. The present invention relates to a method of making a wear-resistant transparent surface layer (1). The method comprises the steps of applying a decorative material to a charger, applying a dry powder layer comprising a mixture of processed wood fibers, binder and wear-resistant particles on top of the decorative layer, and curing the mixture to a decorative surface, comprising the transparent layer resistant to wear, when applying heat and pressure on the mixture. In a preferred embodiment, the method comprises the step of pressing the mixture against an embossed matrix to create a decorative embossed surface with high wear resistance.
    公开号:BR112012025652B1
    申请号:R112012025652-1
    申请日:2011-04-12
    公开日:2021-03-02
    发明作者:Darko Pervan；Goran Ziegler
    申请人:Vãlinge Innovation Ab；
    IPC主号:
    专利说明:

    Technical Field
    [0001] The disclosure in general refers to the field of fiber-based panels with wear-resistant surfaces for construction panels, preferably floor panels. The disclosure concerns building panels with such a wear-resistant surface and production methods for producing such panels. Application field
    [0002] Modalities of the present invention are particularly suitable for use on floating floors, which are formed of floor panels with a wood fiber core and a decorative wear-resistant surface. The following description of technique, problems of known systems and objectives and resources of the invention, therefore, as a non-restrictive example, will be aimed above all in this field of application and in particular on floors that are similar to floating laminate floors based on traditional wood fibers. Modalities of the invention do not exclude floors that are glued to a subfloor.
    [0003] It should be emphasized that modalities of the invention can be used as a panel or as a surface layer, which is, for example, glued to a core. The development can also be used in applications such as, for example, wall panels, ceilings and furniture components and the like. It can also be used on floors with optional surface materials such as cork or wood, in order to improve wear and design properties. Background
    [0004] Direct pressed laminate flooring based on wood fibers usually comprises a core of a 6-12 mm fiber board, a top decorative layer of 0.2 mm thick laminate and a lower balancing layer of 0.10.2 mm thick of laminate, plastic, paper or similar material.
    [0005] A laminate surface generally comprises two sheets of paper; a printed decorative paper of 0.1 mm thick and a transparent coating paper of 0.05-0.1 mm thick applied on the decorative paper and intended to protect the decorative paper against abrasion. Printing on non-transparent decorative paper is only 0.01 mm thick. The transparent coating, which is made of refined fibers (for example, alpha cellulose fibers), comprises small hard and transparent aluminum oxide particles. The refined fibers are instead long, about 2-5 mm, and this gives the coating paper the required strength. In order to obtain transparency, all natural resins that are present in the pure wood fibers are removed and the aluminum oxide particles are applied as a very thin layer on the decorative paper. The surface layer of a laminate floor is characterized in that the de-coring and wear properties in general are obtained with two layers separated on top of each other.
    [0006] The printed decorative paper and the coating are impregnated with melamine resin and laminated to a core based on wood fibers under heat and pressure.
    [0007] The small particles of aluminum oxide can have a size in the range of 20 - 100 microns. The particles can be incorporated into the surface layer in several ways. For example, they can be incorporated into the pulp during the manufacture of the lining paper. They can also be spread on the wet lacquer during the coating impregnation procedure or incorporated into the lacquer used for coating impregnation.
    [0008] The wear layer can also be produced without a cellulose coating. In a case like this melamine resin and aluminum oxide particles are applied as a lacquered layer directly on the decorative paper using similar methods as previously described. A wear layer like this is generally referred to as a liquid coating.
    [0009] With this production method a very wear resistant surface can be obtained and this type of surface is mainly used in laminate floors, but it can also be used in furniture components and similar applications. High-quality laminate floors have a wear resistance of 4,000-6,000 revolutions, which corresponds to the abrasion classes AC4 and AC5 measured with a Taber Abraser according to the ISO standard.
    [00010] It is also known that the wear resistance of a lacquered wooden surface can be improved considerably by incorporating aluminum oxide particles into the transparent lacquer covering the wooden surface.
    [00011] The most common core material used in laminate floors is fiber board with high density and good stability usually called HDF - High Density Fiber Board. Sometimes MDF - Medium Density Fiber Board - is also used as a core. Other core materials such as particleboard are also used.
    [00012] Recently new types of "paper-free" floors have been developed where powder technology is used to obtain a solid laminate surface that comprises a substantially homogeneous mixture of unprocessed wood fibers, binders and wear-resistant particles. Such floor types are referred to below as "solid laminate" floors. The wear resistant particles are preferably aluminum oxide particles and the binders are preferably thermoset resins such as metal. Other suitable materials are, for example, silica or silicon carbide. In general all of these materials are preferably applied in dry form as a powder mixed in an HDF core and cured under heat and pressure to a 0.2 - 1.0 mm solid (opaque) laminated layer. The solid layer on solid laminate floors provides high resistance to impact and wear.
    [00013] Powder technology is also used to produce floors with a surface that combines paper technology and powder technology. Such floor types are referred to below as "wood powder laminate floors". A decorative paper is applied over a sublayer comprising wood powder and binders. The decorative paper is protected by a conventional coating. The main advantages with such floors are that deep embossing and increased impact resistance can be obtained.
    [00014] Wear resistance in laminated wood powder floors is generally not sufficient when deep embossed surfaces are formed since the protruding parts on the surface are subject to high wear. Even a solid laminate floor with several thin layers comprising different colors suffers from low wear resistance.
    [00015] It would be a great advantage if wear resistance could be improved in a low cost way.
    [00016] The previous description of several known aspects is thus the characterization of the applicants, and is not an admission that some part of the previous description is prior art. Definition of Some Terms
    [00017] In the following text, the visible surface of the installed floor panel is called "front side", while the opposite side of the floor panel, facing the subfloor, is called "rear side". The sheet-shaped material that comprises the main part of a panel and provides the panel with the required stability is called a "core". When the core is coated with a surface layer closer to the front side and preferably also with a balance layer closer to the rear side, it forms a semi-manufactured product, which is called a "floor plate" or "floor element" in the case where the semimanufactured product, in a subsequent operation, is divided into a plurality of floor elements. When floor elements are machined along their edges in order to achieve their final shape with the joint system, they are called "floor panels". By "surface layer" it is intended to cover all the layers that give the panel its decorative properties and its resistance to wear and that are applied to the core closest to the front side, preferably covering the total front side of the floor plate. By "decorative surface layer" a layer is intended, which is intended primarily to give the floor its decorative appearance. "Wear layer" refers to a layer, which is mainly adapted to improve the durability of the front side.
    [00018] By "horizontal plane" is meant a plane that extends parallel to the outside of the surface layer. By "horizontally" it is intended parallel to the horizontal plane and by "vertically" it is intended perpendicularly to the horizontal plane. By "up" is intended towards the front side and by "down" towards the rear side.
    [00019] By processed wood fibers it is intended to cover wood fibers that are processed, for example, by removing natural resins such as lignin, in such a way that they are transparent in a cured binder. Known Technique and Problems of the Same
    [00020] In laminate floors the resistance to wear and abrasion is typically provided by aluminum oxide containing coating papers that are impregnated and / or coated, for example, as described in US 2009/0208646 A1. It is also known to provide a coating by applying a liquid layer of a resin, for example, a melamine resin to which aluminum oxide is applied. This type can also be reinforced by adding, for example, cellulose flakes to the liquid layer. It is also known to produce a coating paper by adding aluminum oxide in the papermaking process.
    [00021] The application of a coating paper or liquid layers like this is complicated and expensive and would be an advantage if the production method could be simplified. Furthermore, in deeply embossed products the wear properties are limited since the protruding parts of the surface are subjected to a higher tension than would be the case with more moderately embossed surfaces.
    [00022] The newly developed class of paper-free laminate floors can typically be made with superior wear properties, but in certain formulations surface design elements, prints or other effects may require a surface protection exceeding what can be achieved by normal formulation.
    [00023] It is known that dry and wet coatings, which are produced using production methods where, for example, thermosetting resins in dry or wet form are mixed with aluminum oxide, without any fibers, can also be used. Particles of aluminum oxide mixed with resin powder, for example, can be applied to a wood varnish before pressing and a wear-resistant surface can be obtained without any surface coating after pressing. A production method like this does not provide adequate wear properties. Objectives and Summary
    [00024] An objective of certain embodiments of the invention is to provide a construction panel, preferably a floor panel with a transparent wear-resistant layer, which can be produced in a lower cost way than with the present known technology.
    [00025] A second objective of certain modalities is to provide a construction panel, preferably a floor panel with a transparent wear-resistant layer that can be used to make deeply embossed floor products with greater wear resistance than is possible. with currently known technology.
    [00026] A third objective of certain modalities is to provide a construction panel, preferably a floor panel with a transparent wear-resistant layer that makes it possible to make floors having a better worn surface appearance.
    [00027] A fourth objective of certain modalities is to provide a formulation suitable for application with spreading machines that can achieve any or all of the objectives reported above.
    [00028] The modalities of the invention are not limited to the aforementioned objectives.
    [00029] One aspect of the invention is a production method for producing a construction panel with a decorative surface layer with a transparent wear-resistant surface layer comprising the steps to be followed and preferably in the indicated sequence: • applying a decorative layer on a loader; • apply a layer of dry powder comprising a mixture of processed wood fibers, binder and wear-resistant particles on the decorative layer; and • cure the mixture by applying heat and pressure to obtain a decorative surface layer comprising a transparent, wear-resistant layer.
    [00030] The powder is easy to handle and provides a low cost production method. The processed wood fibers provide, together with the cured binder, a reinforced matrix for the wear-resistant particles, which are distributed essentially homogeneously throughout the thickness of the cured layer. This matrix prevents the wear-resistant particles from loosening during the use of the surface layer and combined with the distribution essentially homogeneously a significant increase in wear resistance is achieved.
    [00031] In one embodiment, the powder mixture may comprise wood fibers processed in the range of about 1% to about 50%, preferably about 20%, by weight of the powder mixture, binder in the range of about 50% to about 90%, preferably about 70%, by weight of the powder mixture, and wear resistant particles in the range of about 0% to about 15%, preferably about 10%, by weight of the mixture of powders.
    [00032] Curing is preferably carried out by applying heat and pressure, for example, by means of pressing plates, for about 5-200 seconds, preferably for 5-30 seconds. The applied heat can be in the range of about 140 ° C to about 200 ° C, preferably in the range of about 160 ° C to about 180 ° C. The pressure applied is in the range of about 20 to about 60 kg / cm2, preferably about 40 kg / cm2.
    [00033] The binder is preferably melamine formaldehyde resin and the wear resistant particles are preferably aluminum oxide or silica. The wear-resistant layer according to a preferred embodiment is pressed with an embossed matrix that forms protruding parts on the surface.
    [00034] The dry powder comprises, according to a modality, processed wood fibers which are essentially all small individual fibers, which can be less than about 1.0 mm, preferably less than 0.5 mm. The small fibers are preferably not joined together as they are, for example, long fibers in layers of paper and an HDF core, and can be compressed, formed and displaced in all directions during the initial part of a compression operation until that the binder cures. The uncured clear wear layer preferably behaves similar to a paste or liquid substance and floats during the initial part of the curing stage.
    [00035] The fiber size can be measured in different ways: • A real individual fiber can be measured in diameter and length. • A fiber size can be defined by the mesh size of the sieve mesh in which the fibers are separated by size and the desired fraction is separated.
    [00036] For refined fibers used in a wood fiber floor produced from an HDF board the typical production steps are: • Reduce the HDF boards to flakes in a pre-mill; • Reduce the flakes to the desired size in a hammer mill; • Sieve the fibers in a mesh with a mesh size of 0.3 mm. Such fibers are often defined to be less than 0.3 mm in size. However, the diameter can certainly be smaller and the length can be longer because of the elongated shape of the fiber.
    [00037] The distribution of fiber sizes after sieving can be defined by means of fiber measurements.
    [00038] For processed fibers (for example, discolored fibers) the mesh size used is often smaller than the size for refined fibers. Fiber sizes are defined by the distribution of the sieved material. A typical fiber size distribution is: 43.6%> 32 μm; 43.7> 90 μm; 0.4%> 160 μm.
    [00039] The mixture of powders and curing can be adapted in such a way that a greater amount of wear-resistant and transparent material is located in the upper parts of the protruding surface parts than in the lower parts and in more compressed parts. This will give greater wear resistance to the parts that will be subject to the highest wear.
    [00040] The decorative layer can include, for example, paper. The paper can be a printed paper impregnated with melamine, for example, a decoration sheet composed of cellulose fibers impregnated with melamine resin. The paper can be placed directly on the loader, for example, an HDF board. The paper can be placed over a scattering of decorative powders mixture. For example, the decorative powder may include wood fibers and a binder, and optionally a wear-resistant pigment and / or particles. The decorative dust wood fibers can be processed wood fibers or unprocessed wood fibers, such as recycled wood fibers.
    [00041] The decorative layer may include, for example, a scattering of mixture of decorative powders. For example, the decorative powder may include wood fibers and a binder, and optionally a wear-resistant pigment and / or particles. The decorative dust wood fibers can be processed wood fibers or unprocessed wood fibers, such as recycled wood fibers. The decorative layer can include, for example, multiple layers of scattered decorative powders.
    [00042] The decorative layer may include, for example, a wooden varnish. The wood varnish can be placed directly on the charger, for example, an HDF board. The wood varnish can be placed on a spreading mixture of decorative powders. For example, the decorative powder may include wood fibers and a binder, and optionally a wear-resistant pigment and / or particles. The decorative dust wood fibers can be processed wood fibers or unprocessed wood fibers, such as recycled wood fibers.
    [00043] The decorative layer can include, for example, cork. Cork can be placed directly on the charger, for example, an HDF board. Cork can be placed over a mixture of decorative powder mixes. For example, the decorative powder may include wood fibers and a binder, and optionally a wear-resistant pigment and / or particles. The decorative dust wood fibers can be processed wood fibers or unprocessed wood fibers, such as recycled wood fibers.
    [00044] A second aspect of the invention is a method of making a construction panel, in which the method comprises the steps of: • applying a decorative layer to a loader; • apply a layer of dry powder comprising a mixture of a thermoplastic material and wear-resistant particles on the decorative layer; and • applying heat and pressure to the dust layer to obtain a decorative surface layer comprising a transparent, wear-resistant layer.
    [00045] Wear-resistant particles may comprise aluminum oxide and / or silica. The mixture can include processed wood fibers.
    [00046] In one embodiment, the powder mix may comprise wood fibers processed in the range of about 1% to about 50%, preferably about 20%, by weight of the mixture of powders, thermoplastic material in the range of about from 50% to about 90%, preferably from about 70%, by weight of the powder mixture, and wear resistant particles in the range of about 0% to about 15%, preferably from about 10%, by weight of the powder mixture.
    [00047] Heat and pressure on the powder layer to obtain the decorative surface layer are preferably carried out by applying heat and pressure, for example, by means of pressing plates, for about 5-200 seconds, preferably during 5-30 seconds. The applied heat can be in the range of about 140 ° C to about 200 ° C, preferably in the range of about 160 ° to about 180 ° C. The applied pressure is in the range of about 20 to about 60 kg / cm2, preferably about 40 kg / cm2. The process can be a so-called hot-hot process.
    [00048] A third aspect of the invention is a method of making a construction panel, in which the method comprises the steps of: • applying a dry powder layer comprising a mixture of processed wood fibers, binder and wear resistant particles directly on a wooden panel; and • apply heat and pressure to the dust layer to obtain a transparent, wear-resistant layer.
    [00049] The resulting product is, for example, a light and polished wood product having excellent chemical and abrasion resistance.
    [00050] Wear-resistant particles may comprise aluminum oxide and / or silica. The binder can comprise a thermoplastic material.
    [00051] The thermoplastic material in the second and third aspects can be transparent material such as vinyl particles. Various plastic materials in powder form can be used such as E-PVC, S-PVC, PVA, PET, PS, SAN, PMMA and the like.
    [00052] The plastic powder should preferably have a glass transition temperature below the desired processing temperature and a melting point greater than the desired processing temperature. The plastic can additionally comprise functional groups such as hydroxy-, carboxy- and amino functionalities. Plastic mixtures can also be used. Brief Description of Drawings
    [00053] The invention in the following will be described in connection with preferred modalities and in more detail with reference to the accompanying exemplary drawings, in which: • figure 1 illustrates a conventional laminated floor panel with an embossed part; • figure 2 illustrates an improved laminate floor with embossed parts; Detailed Description of Modalities
    [00054] A laminate floor having good mechanical wear properties is manufactured by applying heat and pressure to layers of various types of paper sheets over which a layer of dust is spread. The sheets are positioned on a core, such as a medium or high density fiber board. Under the core one or more sheets of paper can be positioned. Sheets are manufactured using standard papermaking techniques and chemistry and are typically impregnated using standard impregnation techniques and chemistry. In one embodiment, the powder layer is composed of a homogeneous mixture of powdered resin, fibers and hard particles. The powdered resin is preferably a thermoset resin such as amine resin or a mixture of such resins. A preferred resin is melamine formaldehyde resin. The fibers are preferably transparent such as processed wood fibers, but also other transparent fibers such as glass fibers can be used. Fibers having limited transparency such as various inorganic fibers, metal fibers or unprocessed wood fibers can be used, but they would not produce the desired transparency of the protective layer. Preferred hard particles to produce the good final mechanical wear properties include aluminum oxide, silicon oxide and mixtures thereof. The use of heat and pressure converts the layers of leaves and the layer of dust spread into a laminate.
    [00055] A typical laminate floor (figure 1) is composed from top to bottom of the following layers: (2) a covering sheet composed of cellulose fibers impregnated with melamine resin in which abrasive particles are incorporated, ( 3) a decoration sheet composed of cellulose fibers impregnated with melamine resin, (4) a core material such as a high density fiber board. A balance sheet composed of cellulose fibers impregnated with melamine resin is typically used on the rear side of the panel. A laminate floor typically has embossed parts (6) extending below the main surface (1). If the embossed parts extend away from the main surface, an inferior appearance may occur because of the limitation of the impregnated papers.
    [00056] An improved laminate floor (figure 2) according to a non-restrictive embodiment of the invention comprises from top to bottom the following layers: (5) a layer of protective powder; powder coating composed of melamine resin powder, processed wood fibers and abrasive particles, (3) a decoration sheet composed of cellulose fibers impregnated with melamine resin, (7) an optional powder layer comprising powder melamine resin and processed wood fibers, (4) a core material such as high density fiberboard. A balance sheet composed of cellulose fibers impregnated with methylene resin is typically used. Since the protective dust layer has no restricted movement in either the horizontal or vertical direction, embossed parts can be found both below (6a) and above (6b) the main surface (1). The resulting products have a greater amount of melamine resins and protective aluminum oxide particles on the protruding parts of the surface (6b) giving greater wear resistance when compared to what is found with conventional coatings.
    [00057] The impregnation of coating papers is typically done on impregnation lines as described, for example, in US 2009/0208646 A1. Such impregnation lines require investments and handling of impregnation fluids that typically have limited shelf life. A process like this can be improved by using a powder coating.
    [00058] Example 1: Direct laminated product having a conventional coating (comparative example).
    [00059] A laminated product comprising an HDF loading plate, a balancing paper, a printed paper impregnated with melamine and a coating was pressed in a short cycle press using a force of 40 kg / cm2 for 25 seconds at a temperature of 160 ° C surface. The pressing plate was a virtually smooth polished plate.
    [00060] The resulting product was a laminate surface having an abrasion resistance exceeding the demands for AC3 according to the test method in EN13329: 2006 (E) with a good surface appearance.
    [00061] Example 2: Laminated product deeply embossed having a conventional coating (comparative example).
    [00062] A laminated product comprising an HDF loading plate, a balancing paper, a printed paper impregnated with melamine and a coating was pressed in a short cycle press using a force of 40 kg / cm2 for 25 seconds at a temperature of 160 ° C surface. The pressing plate was a deeply structured plate with parts having a depth of 0.7 mm.
    [00063] The resulting product was a laminate surface having an abrasion resistance failing to meet the demands for AC2 according to the test method in EN13329: 2006 (E). Furthermore, the surface appearance was not good enough since the laminated sheets of paper cracked in the large embossings.
    [00064] Example 3: Direct laminated product deeply embossed having a protective layer made with regular fibers (comparative example).
    [00065] A laminated product comprising an HDF loading plate, a balancing paper, a printed paper impregnated with melamine and a 300 g / m2 protective layer comprising a homogeneous mixture of recycled fibers that have not been processed, powdered resins of melamine and aluminum oxide particles was pressed in a short cycle press using a force of 40 kg / cm2 for 25 seconds at a surface temperature of 160 ° C. The pressing plate was a virtually smooth pressing plate.
    [00066] The resulting product was a laminate surface having an abrasion resistance exceeding the demands for AC6 according to the test method in EN13329: 2006 (E). The surface appearance was not good enough since the fibers in the protective layer were visible.
    [00067] Example 4: Direct laminate deeply embossed having a protective layer in accordance with a disclosure modality.
    [00068] A laminated product comprising an HDF loading plate, a balancing paper positioned under the HDF, 1,000 g / m2 of a spread sublayer comprising a homogeneous mixture of recycled fibers and amine resins, spread over the HDF, a printed paper impregnated with melamine resins positioned on the scattered sublayer and 300 g / m2 of a protective layer comprising a homogeneous mixture of processed fibers, melamine powder resins and aluminum oxide particles, spread over the printed paper impregnated with molasses - mine, was pressed in a short cycle press using a force of 40 kg / cm2 for 25 seconds at a surface temperature of 160 ° C. The pressing plate was a deeply structured plate with parts having a depth of 0.7 mm.
    [00069] The resulting product was a laminate surface having an abrasion resistance exceeding the demands for AC3 according to the test method in EN13329: 2006 (E). The surface appearance was good enough since the fibers in the protective layer were not visible and cracks in the lining paper not found in the embossed parts deeply on the surface.
    [00070] Example 5: Construction panel free of deeply embossed paper having a protective layer in accordance with a disclosure modality.
    [00071] 150 g / m2 of a protective layer comprising a homogeneous mixture of processed fibers, powdered resin of aluminum foil and particles of aluminum oxide, spread over 150 g / m2 of a decorative layer comprising a homogeneous mixture of fibers processed, melamine powder resins, pigment particles and aluminum oxide particles, spread over 500 g / m2 of a second decorative layer comprising a homogeneous mixture of processed fibers, melamine powder resins, pigment particles and oxide particles aluminum were pressed in a short cycle press using a force of 40 kg / cm2 for 25 seconds at a surface temperature of 160 ° C. The pressing plate was a deeply structured plate with parts having a depth of 0.7 mm.
    [00072] The resulting product was a deeply structured paper-free laminate having an abrasion resistance exceeding the demands for AC6 according to the test method in EN13329: 2006 (E).
    [00073] The initial surface appearance was excellent since the protective layer protects the surface against micro-scratches that typically give the products a premature wear appearance.
    [00074] Example 6: Wooden panel having a protective layer according to a disclosure modality.
    [00075] A sanded wood panel was spread with 150 g / m2 of a protective layer comprising a homogeneous mixture of processed fibers, melamine powder resins and aluminum oxide particles. The product was compressed at 2,000 kPa (20 bar) for 30 seconds at 160 ° C using a smooth polished pressing plate.
    [00076] The resulting product was a uniform polished wood product having excellent chemical and abrasion resistance.
    权利要求:
    Claims (15)
    [0001]
    1. Method of making a construction panel, characterized by the fact that the method comprises the steps of: - applying a decorative layer on a magazine, where the decorative layer includes one of the following: - paper, - a varnish of wood, - a cork, or - a mixture of scattered decorative powder; - apply a layer of dry powder, comprising a mixture of processed wood fibers, binder and wear-resistant particles, on the decorative layer; and - cure the mixture by applying heat and pressure to obtain a transparent wear-resistant layer on the decorative layer.
    [0002]
    2. Method according to claim 1, characterized by the fact that the panel is a floor panel.
    [0003]
    Method according to claim 1 or 2, characterized in that the loader is a wood-based board, preferably an HDF or MDF board.
    [0004]
    4. Method according to any one of the preceding claims, characterized by the fact that the wear-resistant particles are aluminum oxide.
    [0005]
    5. Method according to any one of the preceding claims, characterized by the fact that the paper is a printed paper.
    [0006]
    6. Method according to any one of the preceding claims, characterized by the fact that the curing step comprises pressing the mixture against an embossed matrix.
    [0007]
    7. Method according to claim 6, characterized by the fact that the pressing against the embossed matrix creates an embossing depth that exceeds a thickness of the decorative layer.
    [0008]
    8. Method according to claim 6, characterized in that the pressing against the embossed die creates an embossing depth that exceeds the combined thickness of the decorative layer and the transparent wear layer.
    [0009]
    Method according to any one of the preceding claims, characterized in that the decorative layer comprises a transparent paper-based coating comprising aluminum oxide.
    [0010]
    Method according to any one of the preceding claims, characterized in that the decorative layer comprises a transparent paper-based coating comprising aluminum oxide applied on a lower dry powder layer, the lower dry powder layer comprising fibers of wood and a binder.
    [0011]
    11. Method according to any one of the preceding claims, characterized by the fact that the processed wood fibers are all essentially less than 1.0 mm, preferably less than 0.5 mm.
    [0012]
    12. Method according to any one of the preceding claims, characterized in that the heat and pressure are applied for 5-200 seconds, preferably for 5-30 seconds.
    [0013]
    13. Method according to any one of the preceding claims, characterized by the fact that the applied heat is in the range of 140 ° C to 200 ° C, preferably in the range of 160 ° C to 180 ° C.
    [0014]
    14. Method according to any one of the preceding claims, characterized by the fact that the applied pressure is in the range of 20 to 60 kg / cm2, preferably 40 kg / cm2.
    [0015]
    15. Method according to any one of the preceding claims, characterized in that the thickness of the transparent surface layer exceeds the thickness of the decorative layer.
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    同族专利:
    公开号 | 公开日
    EP3351383A1|2018-07-25|
    EP3351383B1|2022-03-09|
    LT2558297T|2018-03-26|
    CA2793863C|2018-02-13|
    EP2558297A4|2015-04-22|
    CN102917878B|2016-01-13|
    KR20130069609A|2013-06-26|
    BR112012025652A2|2016-06-28|
    RU2564347C2|2015-09-27|
    WO2011129755A2|2011-10-20|
    EP2558297A2|2013-02-20|
    KR101850921B1|2018-04-20|
    ES2666473T3|2018-05-04|
    EP2558297B1|2018-03-07|
    HRP20180539T1|2018-05-04|
    WO2011129755A3|2011-12-15|
    MY156338A|2016-02-15|
    PL2558297T3|2018-07-31|
    CN102917878A|2013-02-06|
    UA107489C2|2015-01-12|
    CA2793863A1|2011-10-20|
    RU2012146337A|2014-05-20|
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    法律状态:
    2017-11-28| B25A| Requested transfer of rights approved|Owner name: VAELINGE INNOVATION AB (SE) |
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-01| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2020-12-29| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-02| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/04/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050363-9|2010-04-13|
    SE1050363|2010-04-13|
    PCT/SE2011/050446|WO2011129755A2|2010-04-13|2011-04-12|Powder overlay|
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