Micro-wiredrawing multilayer solid wood composite floor and production process thereof

Abstract

The invention belongs to the technical field of building materials, and relates to a micro-wire-drawing multilayer solid wood composite floor which comprises a surface layer, a core layer and a bottom layer, eucalyptus layers are arranged among the surface layer, the core layer and the bottom layer, the layers are arranged in a criss-cross mode through textures, and adhesive layers are arranged among the layers. A UV paint curing-micro-wire-drawing treatment layer is arranged on the surface layer, discontinuous micro-wire-drawing lines with the same depth are distributed on the surface of the UV paint curing layer in the length direction of the floor in parallel with the UV paint curing layer, and the depth of the micro-wire-drawing lines is 0.03-0.10 mm. The invention further discloses a production process. The surface of the floor is provided with micro wiredrawing lines, so that when people see the floor, different visual effects can be generated due to different light refraction at different visual angles, and the floor is stereoscopic and rich. The production process is simple, low in energy consumption, high in efficiency, energy-saving and environment-friendly, natural textures and colors of wood are reserved, and the textures are clear.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials and relates to solid wood floors, in particular to a micro-brushed multi-layer solid wood composite floor and a production process thereof. Background Art

[0002] Multi-layer engineered wood flooring is made with natural, valuable wood veneer (veneer) of varying thicknesses as the surface layer, and plywood backing made from interlaced, solid wood veneer. Coated with a high-performance, wear-resistant, and environmentally friendly UV-curable floor paint, it is widely used in the home furnishing and building materials industry. Multi-layer engineered wood flooring is a popular decorative material in the furniture and building materials industry. However, with the scarcity of forest resources, beautifully patterned surface finishes are becoming increasingly scarce. However, fast-growing and low-grade wood, due to their rough grain, monotonous surface patterns, and high veneer prices, have led to a declining market share.

[0003] Chinese patent CN102501658A discloses a simultaneous printing and embossing process for flooring, which achieves a fidelity that nearly replicates the texture of a real floor by synchronizing the printing and embossing processes. Using simultaneous printing and embossing equipment, the pattern is first overprinted with ink on multiple plates, dried with UV light, and then pressed with an embossing roller to create a concave and convex three-dimensional effect. The flooring, which has been embossed and printed simultaneously, is then treated with a wear- and scratch-resistant surface treatment. This method uses simultaneous overprinting to create a concave and convex three-dimensional texture, and the surface is then painted after overprinting.

[0004] Chinese patent CNCN116079854A discloses an embossing roller engraving device for floor surface texture styles. The disclosed embossing roller engraving device heats the embossing roller by heating it with a heating plate, so that the entire embossing roller is heated evenly. Because the heating plate is located inside the embossing roller and the iron is close to the surface of the embossing roller, the embossing machine can extrude texture styles on the surfaces of floors, solid wood door panels, cabinet panels, furniture panels, etc., with a strong three-dimensional effect. The resulting floors and solid wood furniture are high-end and elegant, with a strong visual effect. It is the best surface treatment method for the new generation of floors and solid wood furniture. It adopts the method of heating the roller and then embossing the floor surface. Summary of the Invention

[0005] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to disclose a micro-brushed multi-layer solid wood composite floor, which uses a criss-cross multi-layer board substrate layer as a matrix, firstly coating its surface with a UV superior white base, then applying a UV paint primer layer on the superior white base, providing a transfer layer and a UV paint layer on the UV paint primer layer, then performing a micro-brushing treatment on the surface of the UV paint layer, and finally carrying out the molding, chamfering, wax sealing and packaging processes.

[0006] Technical Solution

[0007] A micro-brushed multi-layer solid wood composite floor comprises a surface layer, a core layer and a bottom layer, wherein a eucalyptus layer (A) is provided between the surface layer and the core layer, and a eucalyptus layer (B) is provided between the core layer and the bottom layer, wherein the layers are arranged in a crisscross pattern and an adhesive layer is provided between them; a UV paint curing-micro-brushing treatment layer is provided above the surface layer, wherein the UV paint curing-micro-brushing treatment layer has discontinuous micro-brushing patterns of uniform depth distributed on the surface of the UV paint curing layer along and parallel to the length of the floor, with a depth of 0.03-0.10 mm.

[0008] In a preferred disclosed example of the present invention, the UV paint curing layer has a thickness of 0.15-0.25 mm and comprises a UV superior white base coating, on which a UV paint base coating is provided, and on top of the UV paint base coating, a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking and adhesion-enhancing coating, a wear-resistant coating, a hard coating, a topcoat coating and other UV coatings are sequentially provided.

[0009] Furthermore, the UV excellent white base coating is a UV Grace white slurry cured layer.

[0010] Furthermore, the transfer layer is a UV ink curing layer with UV coloring dye, with a thickness of 0.05-0.15 mm.

[0011] In a preferred disclosed example of the present invention, the surface layer and the bottom layer are 1.2±0.2 mm thick, the wood grain is fine and straight, the tissue structure has fewer spots, and the processing, finishing and gluing properties are good; further, the surface layer and the bottom layer are made of beech, birch, sycamore, etc.

[0012] In a preferred disclosed example of the present invention, the core layer is 7±0.5 mm thick, and is made of wood with fine annual rings, flexible texture, straight grain, small drying deformation, medium mechanical strength, and good processing performance, with a moisture content of 6-8%; further, the core layer is pine wood, such as Scotch pine, radiata pine, etc.

[0013] In a preferred disclosed example of the present invention, the eucalyptus layer (A) and the eucalyptus layer (B) have a thickness of 2.2±0.5 mm, a tight wood grain, a high density, and are not easily deformed after drying. Their texture is arranged perpendicular to the texture of the core layer, the surface layer, and the bottom layer, that is, crisscrossed.

[0014] The micro-brushed multi-layer solid wood composite floor of the present invention is provided with lock buckles at its edges, and the thickness of the floor is 8-18 mm.

[0015] Another object of the present invention is to disclose a production process of the above-mentioned micro-brushed multi-layer solid wood composite floor.

[0016] A production process for micro-brushed multi-layer solid wood composite flooring, comprising base material preparation - cold pressing and hot pressing curing - cutting, after cutting, UV excellent color white base - primer - indirect UV ink transfer - primer - topcoat - micro-brushing treatment - molding - chamfering paint - wax sealing - packaging; wherein,

[0017] In the indirect UV ink transfer process, a UV ink colored primer containing a dye is flowed onto the surface of a textured steel plate roller. The surface of the steel plate roller contacts a transfer rubber roller, and the texture pattern on the surface of the steel plate roller with ink is transferred to the rubber roller. The rubber roller is in full contact with the floor surface, and the texture pattern transferred from the steel plate roller is transferred to the floor surface in a secondary transfer manner, and then UV drying is performed;

[0018] In the micro-brushing process, a textured steel roller is used to roll the surface of the floor having a UV paint cured layer, forming a texture along the length of the floor and discontinuous brushed lines parallel to the length of the floor; furthermore, the brushing depth is 0.03-0.10 mm, the brushing is discontinuous, and the depth is consistent.

[0019] According to a preferred embodiment of the present invention, in the indirect UV ink transfer process, the UV ink coloring primer is an ultraviolet light curing UV coating.

[0020] Furthermore, the engraving depth of the steel plate roller is 200-300 μm, and the grain pattern formed is not limited. Furthermore, the grain pattern formed includes any pattern such as oak grain, wood ray, cloth grain, and patchwork pattern.

[0021] Furthermore, the transfer rubber roller is a polyurethane mirror rubber roller with a Shore hardness of 10 to 30. Its surface contacts the steel plate roller, and the texture pattern on the surface of the steel plate roller is transferred to the surface of the polyurethane mirror rubber roller. The mirror roller then fully contacts the floor surface, adjusts the height of the roller, and squeezes the floor surface through the rubber roller to transfer the transferred texture pattern to the wooden floor surface.

[0022] In a preferred embodiment of the present invention, the UV excellent color white base process, also known as the water-based excellent coloring process, is to apply a layer of UV excellent color Grace white slurry on the floor board surface, wherein 1%-5% of a hardener is added to enhance adhesion; the UV excellent color white base coating is formed by curing the UV Grace white slurry, and is generally divided into two coatings, with the first coating amount being 5-10g / m 2 , the second coating amount is 10-30g / m 2 .

[0023] In a preferred disclosed example of the present invention, the forming process is to perform a tongue-and-groove process on the floor after the micro-brush treatment.

[0024] In the preferred embodiment of the present invention, the sealing chamfer paint process sprays the chamfer paint with the same color as the board surface at the chamfer position around the floor to adapt to the board surface color and make it coordinated and unified. Further, the coating amount is 5-10g / m 2 After coating, it is dried by ultraviolet light. The drying tunnel adopts infrared electronic heating method, the temperature is 100-200℃, and the heating time is 10-60s.

[0025] In the preferred embodiment of the present invention, the wax sealing process has a coating amount of 20-30 g / m 2 After wax sealing and passing the quality QC inspection, the products are shipped off the production line and packaged and put into storage.

[0026] This method designs and laser-engraves the steel roller used for printing. The resulting pattern is then transferred to a softer, mirror-finished polyurethane rubber roller. Using low-grade wood resources, the natural color variations on the wood surface are masked through transfer printing. After the wood is painted, the flooring is embossed to create a micro-brushed, paint-finished, multi-layer solid wood composite micro-brushed solid wood composite flooring. This method is simple, energy-efficient, and environmentally friendly, while preserving the wood's natural texture and color, resulting in clear, clear lines. The production process is simple and cost-effective. Post-processing also enhances visual quality and paint adhesion.

[0027] Beneficial effects

[0028] The present invention discloses a process for producing micro-brushed multi-layer solid wood composite flooring. First, the steel roller used for printing is designed and laser engraved. The texture is then transferred to the surface of a relatively soft polyurethane mirror rubber roller. Low-grade veneer from wood resource materials is used, and the natural color difference on the wood surface is covered and printed through indirect transfer technology, while retaining the natural texture of the wood. Secondly, the floor surface with a transfer paint layer is rolled by a steel roller with texture to form a texture along the length of the floor, and intermittent brushed texture parallel to the length of the floor. The production of the surface micro-brushed texture allows people to view the floor at different visual angles due to different light refraction, resulting in different visual effects and rich overall visual three-dimensionality. The present invention has low energy consumption, high efficiency, energy conservation and environmental protection, retains the natural texture and color of the wood, has clear texture, simple production process and low cost; and avoids the problems of direct contact of the rubber roller with texture to the hard wooden floor surface, which causes serious damage to the pattern over a long period of use, and makes it difficult to control the surface effect. Through post-processing, the flooring has better visual properties, not only with high paint adhesion, but also with a surface texture similar to that of impregnated paper laminated solid wood composite flooring, improving product quality. The physical and mechanical properties of the flooring produced meet the requirements of various indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 .Schematic diagram of the structure of micro-brushed multi-layer solid wood composite flooring;

[0030] Figure 2 .Schematic diagram of some micro-brushed textures;

[0031] Among them, the names of the components are: 1-surface layer, 2-eucalyptus layer (A), 3-core layer, 4-eucalyptus layer (B), 5-bottom layer, 6-UV paint curing-micro-brushing treatment layer. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the following examples so that those skilled in the art can better understand the present invention. However, the present invention is not limited to the following examples.

[0033] Example 1

[0034] A micro-brushed multi-layer solid wood composite floor comprises a surface layer 1, a core layer 3 and a bottom layer 5. A eucalyptus layer (A) is provided between the surface layer 1 and the core layer 3, and a eucalyptus layer (B) is provided between the core layer 3 and the bottom layer 5. The layers are arranged in a criss-cross pattern with adhesive layers provided between them. A UV paint-cured and micro-brushed treatment layer 6 is provided on top of the surface layer 1. The UV paint-cured and micro-brushed treatment layer 6 has discontinuous micro-brushed lines of uniform depth distributed on the surface of the UV paint-cured layer, along and parallel to the length of the floor. The depth is 0.03-0.10 mm.

[0035] Example 2

[0036] A micro-brushed multi-layer solid wood composite floor comprises a surface layer 1, a core layer 3, and a bottom layer 5. A eucalyptus layer (A) is provided between the surface layer 1 and the core layer 3, and a eucalyptus layer (B) is provided between the core layer 3 and the bottom layer 5. The layers are arranged in a crisscross pattern with adhesive layers provided between them. A UV paint-cured-micro-brushed treatment layer 6 is provided on the surface layer 1. The UV paint-cured-micro-brushed treatment layer 6 is provided on the surface of the UV paint-cured layer, along the length of the floor and parallel thereto, with discontinuous micro-brushed lines of uniform depth, the depth of which is 0.03-0.10 mm. The UV paint-cured layer has a thickness of 0.15-0.25 mm and comprises a UV superior white primer coating, a UV paint primer coating provided thereon, and a UV coating layer, a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking and adhesion-promoting coating, a wear-resistant coating, a hard coating, a topcoat coating, and the like UV coatings provided in sequence on the UV paint primer coating.

[0037] Example 3

[0038] A micro-brushed multi-layer solid wood composite flooring comprises a surface layer 1, a core layer 3, and a bottom layer 5. A eucalyptus layer (A) is provided between the surface layer 1 and the core layer 3, and a eucalyptus layer (B) is provided between the core layer 3 and the bottom layer 5. The layers are arranged in a crisscross pattern with adhesive layers provided between them. A UV paint-cured and micro-brushed treatment layer 6 is provided on top of the surface layer 1. The UV paint-cured and micro-brushed treatment layer 6 has discontinuous micro-brushed lines of uniform depth distributed on the surface of the UV paint-cured layer, along and parallel to the length of the flooring. The depth is 0.03-0.10mm; the thickness of the UV paint curing layer is 0.15-0.25mm, and it includes a UV excellent white base coating, that is, a UV Grace white slurry curing layer, on which a UV paint base coating is provided, and on the UV paint base coating, a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking adhesion-enhancing coating, a wear-resistant coating, a hard coating, a topcoat coating and other UV coatings are sequentially provided. The transfer layer is a UV ink curing layer with a UV coloring dye, and the thickness is 0.05-0.15mm.

[0039] Example 4

[0040] A micro-brushed multi-layer solid wood composite flooring comprises a surface layer 1, a core layer 3 and a bottom layer 5, wherein a eucalyptus layer (A) is provided between the surface layer 1 and the core layer 3, and a eucalyptus layer (B) is provided between the core layer 3 and the bottom layer 5, wherein the layers are arranged in a crisscross pattern and an adhesive layer is provided between them; the thickness of the surface layer 1 and the bottom layer 5 is 1.2±0.2 mm, and the wood materials are beech, birch, sycamore, etc.; the thickness of the eucalyptus layer (A) and the eucalyptus layer (B) is 2.2±0.5 mm; a UV paint curing-micro-brushing treatment layer 6 is provided on the surface of the UV paint curing layer, and the UV paint curing-micro-brushing treatment layer 6 is provided along the surface of the UV paint curing layer. The flooring is provided with discontinuous but consistent micro-brushed lines in the length direction and parallel to the flooring, with a depth of 0.03-0.10mm; the UV paint curing layer is 0.15-0.25mm thick, and comprises a UV excellent white base coating, namely a UV Grace white slurry curing layer, on which a UV paint base coating is provided, and on top of the UV paint base coating are sequentially provided with a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking and adhesion-enhancing coating, a wear-resistant coating, a hard coating, a topcoat and other UV coatings; the transfer layer is a UV ink curing layer with a UV coloring dye, with a thickness of 0.05-0.15mm.

[0041] Example 5

[0042] A micro-brushed multi-layer solid wood composite flooring comprises a surface layer 1, a core layer 3 and a bottom layer 5, wherein a eucalyptus layer (A) is provided between the surface layer 1 and the core layer 3, and a eucalyptus layer (B) is provided between the core layer 3 and the bottom layer 5, wherein the layers are arranged in a crisscross pattern and an adhesive layer is provided between them; the thickness of the surface layer 1 and the bottom layer 5 is 1.2±0.2 mm, and the wood materials are beech, birch, sycamore, etc.; the thickness of the eucalyptus layer (A) and the eucalyptus layer (B) is 2.2±0.5 mm; a UV paint curing-micro-brushing treatment layer 6 is provided on the surface of the UV paint curing layer, and the UV paint curing-micro-brushing treatment layer 6 is distributed along the length direction of the flooring and parallel to the UV paint curing layer. The micro-brushed lines are discontinuous and of consistent depth, with a depth of 0.03-0.10mm; the UV paint curing layer is 0.15-0.25mm thick and includes a UV excellent white base coating, that is, a UV Grace white slurry curing layer, on which a UV paint base coating is provided, and on top of the UV paint base coating, there are sequentially provided with a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking adhesion-enhancing coating, a wear-resistant coating, a hard coating, a topcoat and other UV coatings. The transfer layer is a UV ink curing layer with UV coloring dyes, with a thickness of 0.05-0.15mm; the edges of the micro-brushed multi-layer solid wood composite floor are provided with locks, and the floor thickness is 8-18mm.

[0043] Example 6

[0044] A production process for micro-brushed multi-layer solid wood composite flooring, comprising base material preparation - cold pressing and hot pressing curing - cutting, after cutting, UV excellent color white base - primer - indirect UV ink transfer - primer - topcoat - micro-brushing treatment - molding - chamfering paint - wax sealing - packaging; wherein,

[0045] The indirect UV ink transfer process involves flowing a UV ink coloring primer (i.e., a UV-curable UV coating) containing a dye onto the surface of a textured steel plate roller. The engraving depth of the steel plate roller is 200 to 300 μm, and the texture pattern formed is not limited. The surface of the steel plate roller is brought into contact with a transfer rubber roller, and the texture pattern on the surface of the steel plate roller containing ink is transferred to the rubber roller. The transfer rubber roller is a polyurethane mirror rubber roller with a Shore hardness of 10 to 30, which is in full contact with the floor surface. The texture pattern transferred from the steel plate roller is transferred to the floor surface in a secondary transfer manner, and then UV drying is performed.

[0046] In the micro-brushing process, a textured steel roller is used to roll the surface of the floor having a UV paint cured layer, forming a texture along the length of the floor and discontinuous brushed lines parallel to the length of the floor; furthermore, the brushing depth is 0.03-0.10 mm, the brushing is discontinuous, and the depth is consistent.

[0047] Example 7

[0048] A production process for micro-brushed multi-layer solid wood composite flooring, comprising base material preparation - cold pressing and hot pressing curing - cutting, after cutting, UV excellent color white base - primer - indirect UV ink transfer - primer - topcoat - micro-brushing treatment - molding - chamfering paint - wax sealing - packaging; wherein,

[0049] The UV Excellent Color White Base process, also known as the water-based Excellent Color coloring process, is to apply a layer of UV Excellent Color Grace White slurry on the floor surface, in which 1%-5% hardener is added to enhance adhesion; it is divided into two coating processes, the first coating amount is about 5-10g / m 2 , the second coating amount is 10-30g / m 2 ;

[0050] The indirect UV ink transfer process is to flow a UV ink coloring base with a dye, i.e., a UV-curable UV coating, onto the surface of a steel plate roller with a pattern, wherein the engraving depth of the steel plate roller is 200 to 300 μm, and the pattern formed includes any pattern such as oak wood grain, wood rays, cloth grain, and parquet pattern; the surface of the steel plate roller is in contact with a transfer rubber roller, and the pattern on the surface of the steel plate roller with ink is transferred to the rubber roller, which is a polyurethane mirror rubber roller with a Shore hardness of 10 to 30. The transfer rubber roller is in full contact with the floor surface, and the pattern transferred from the steel plate roller is transferred to the floor surface in a secondary transfer manner, and then UV drying is performed;

[0051] In the micro-brushing process, a steel roller with a pattern is used to roll the surface of the floor with a UV paint cured layer to form a texture along the length of the floor, and a discontinuous brushed pattern parallel to the length of the floor. Furthermore, the brushing depth is 0.03-0.10mm, the brushing is discontinuous, and the depth is consistent.

[0052] The forming process is to perform a locking tongue-and-groove process on the floor after the micro-brushing process.

[0053] Example 8

[0054] A production process for micro-brushed multi-layer solid wood composite flooring, comprising base material preparation - cold pressing and hot pressing curing - cutting, after cutting, UV excellent color white base - primer - indirect UV ink transfer - primer - topcoat - micro-brushing treatment - molding - chamfering paint - wax sealing - packaging; wherein,

[0055] The cold pressing process has a unit pressure of 0.8-0.9 MPa and a time adjusted according to the thickness of the skin, generally 100-300 seconds; the hot pressing curing process has a hot pressing pressure of 10-18 MPa and a temperature of 90-105°C, and the substrate with the veneer after hot pressing is cured for ≥3.5 days;

[0056] The balanced and cured substrate is cut into strips through the cutting equipment;

[0057] The UV Excellent Color White Base process, also known as the water-based Excellent Color coloring process, is to apply a layer of UV Excellent Color Grace White slurry on the floor surface, in which 1%-5% hardener is added to enhance adhesion; it is divided into two coating processes, the first coating amount is about 5-10g / m 2 , the second coating amount is 10-30g / m 2 ;

[0058] The indirect UV ink transfer process is to flow a UV ink coloring base with a dye, i.e., a UV-curable UV coating, onto the surface of a steel plate roller with a pattern, wherein the engraving depth of the steel plate roller is 200 to 300 μm, and the pattern formed includes any pattern such as oak wood grain, wood rays, cloth grain, and parquet pattern; the surface of the steel plate roller is in contact with a transfer rubber roller, and the pattern on the surface of the steel plate roller with ink is transferred to the rubber roller, which is a polyurethane mirror rubber roller with a Shore hardness of 10 to 30. The transfer rubber roller is in full contact with the floor surface, and the pattern transferred from the steel plate roller is transferred to the floor surface in a secondary transfer manner, and then UV drying is performed;

[0059] In the micro-brushing process, a steel roller with a pattern is used to roll the surface of the floor with a UV paint cured layer to form a texture along the length of the floor, and a discontinuous brushed pattern parallel to the length of the floor. Furthermore, the brushing depth is 0.03-0.10mm, the brushing is discontinuous, and the depth is consistent.

[0060] The molding process is to perform a tongue-and-groove process on the floor after the micro-brushing process;

[0061] The sealing chamfer paint process is to spray the chamfer paint with the same color as the board surface on the chamfer positions around the floor to adapt to the board surface color and make it coordinated and unified. The coating amount is 5-10g / m 2 After coating, ultraviolet drying is used. The drying tunnel adopts infrared electronic heating method, the temperature is 100-200℃, and the heating time is 10-60s.

[0062] The wax sealing process, the coating amount is 20-30g / m 2 After wax sealing and passing the quality QC inspection, the products are shipped off the production line and packaged and put into storage.

[0063] Table 1 Performance of micro-brushed multi-layer solid wood composite flooring prepared in Example 5 or Example 8

[0064]

[0065] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A micro-brushed multi-layer solid wood composite floor, comprising a surface layer (1), a core layer (3) and a bottom layer (5), wherein a eucalyptus layer (A) (2) is provided between the surface layer (1) and the core layer (3), and a eucalyptus layer (B) (4) is provided between the core layer (3) and the bottom layer (5), wherein the layers are arranged in a crisscross pattern and an adhesive layer is provided between them; and characterized in that: A UV paint curing-micro brushing treatment layer (6) is provided on the surface layer (1). The UV paint curing-micro brushing treatment layer (6) is provided with discontinuous micro brushing lines of uniform depth distributed on the surface of the UV paint curing layer along and parallel to the length direction of the floor, with a depth of 0.03-0.10 mm.

2. The micro-brushed multi-layer solid wood composite floor according to claim 1, characterized in that: The UV paint curing layer has a thickness of 0.15-0.25 mm and comprises a UV superior white base coating, on which a UV paint base coating is provided, and on top of the UV paint base coating a transfer layer, a UV paint layer, an adhesion primer mixed layer, an anti-cracking adhesion-enhancing coating, a wear-resistant coating, a hard coating, and a topcoat coating are sequentially provided.

3. The micro-brushed multi-layer solid wood composite floor according to claim 1, characterized in that: The UV excellent white base coating is a UV Grace white slurry solidified layer; the transfer layer is a UV ink solidified layer with UV coloring dye, with a thickness of 0.05-0.15 mm.

4. The micro-brushed multi-layer solid wood composite flooring according to claim 1, characterized in that: The surface layer (1) and the bottom layer (5) are 1.2±0.2 mm thick and are made of beech, birch or sycamore; the core layer (3) is 7±0.5 mm thick and is made of pine, such as Scotch pine or radiata pine; the eucalyptus layer (A) (2) and the eucalyptus layer (B) (4) are 2.2±0.5 mm thick.

5. The micro-brushed multi-layer solid wood composite floor according to claim 1, characterized in that: The floor edge is provided with a lock buckle, and the floor thickness is 8-18 mm.

6. A process for producing the micro-brushed multi-layer solid wood composite flooring according to any one of claims 1 to 5, characterized in that: It includes base material preparation - cold pressing and hot pressing curing - cutting, after cutting, UV excellent color white base - primer - indirect UV ink transfer - primer - topcoat - micro brushing treatment - molding - sealing chamfer paint - sealing wax - packaging; Among them, In the indirect UV ink transfer process, a UV ink colored primer containing a dye is flowed onto the surface of a textured steel plate roller. The surface of the steel plate roller contacts a transfer rubber roller, and the texture pattern on the surface of the steel plate roller with ink is transferred to the rubber roller. The rubber roller is in full contact with the floor surface, and the texture pattern transferred from the steel plate roller is transferred to the floor surface in a secondary transfer manner, and then UV drying is performed; In the micro-brushing process, a steel roller with a pattern is used to roll the surface of the floor with a UV paint cured layer to form a texture along the length of the floor, which is a discontinuous brushed pattern parallel to the length of the floor.

7. The production process of the micro-brushed multi-layer solid wood composite flooring according to claim 6, characterized in that: In the indirect UV ink transfer process, the UV ink coloring primer is an ultraviolet light-curing UV coating; the engraving depth of the steel plate roller is 200 to 300 μm, and the formed grain pattern is not limited, including any pattern such as oak wood grain, wood rays, cloth grain, and parquet pattern; the transfer rubber roller is a polyurethane mirror rubber roller with a Shore hardness of 10 to 30, and its surface contacts the steel plate roller, and the grain pattern on the surface of the steel plate roller is transferred to the surface of the polyurethane mirror rubber roller. The mirror roller then fully contacts the floor surface, adjusts the height of the roller, and squeezes the rubber roller across the floor surface to transfer the transferred grain pattern to the wooden floor surface.

8. The production process of the micro-brushed multi-layer solid wood composite flooring according to claim 6, characterized in that: The UV excellent color white base process, also known as the water-based excellent coloring process, is to apply a layer of UV excellent color Grace white slurry on the floor surface, in which 1%-5% hardener is added. It is divided into two coatings, and the first coating amount is 5-10g / m 2 , the second coating amount is 10-30 g / m 2 .

9. The production process of the micro-brushed multi-layer solid wood composite flooring according to claim 6, characterized in that: The molding process is to perform a tongue-and-groove process on the floor after the micro-brushing process; the sealing chamfering paint process is to spray the chamfering paint with the same color as the board surface on the chamfer positions around the floor to adapt to the board surface color and make it coordinated and unified. Furthermore, the coating amount is 5-10g / m 2 After coating, it is dried by ultraviolet light. The drying tunnel adopts infrared electronic heating method, the temperature is 100-200℃, and the heating time is 10-60s.

10. The production process of the micro-brushed multi-layer solid wood composite flooring according to claim 6, characterized in that: The wax sealing process, the coating amount is 20-30g / m 2 After wax sealing and passing the quality QC inspection, the products are shipped off the production line and packaged and put into storage.

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