EB-cured polypropylene film veneer rubber wood core composite floor

Abstract

The utility model belongs to the technical field of ground paving materials, and relates to an EB (Epstein-Barr) cured polypropylene film veneer rubber wood core composite floor, which is characterized in that a gluing layer is arranged between a surface decoration layer and an improved three-layer rubber wood core solid wood composite floor base body layer, the surface decoration layer is an EB cured polypropylene film, and the EB cured polypropylene film is a polypropylene film. The thickness of the rubber wood core solid wood composite floor base body layer is 10-18 mm, the rubber wood core solid wood composite floor base body layer sequentially comprises a base material surface layer, a base material core layer and a base material bottom layer, the base material surface layer, the base material core layer and the base material bottom layer are pressed into an integrated sandwich type structure according to criss-cross textures, the base material core layer is a rubber lignin face finger joint integrated board, and rubber wood laths are lengthened in a finger joint mode in the end direction and integrally spliced in a flush joint mode in the side direction. The net size of the length and width is 1230 to 1250 mm * 1930 to 2440 mm, and the net size of the thickness is 8 to 13 mm. The floor is stable in performance and structure, not prone to deformation and suitable for the geothermal environment; the base material main body is formed by finger joint of rubber wood laths, the finger joint strip-shaped small blocks can effectively avoid defect positions, and wood is fully utilized.

Description

Technical Field

[0001] The utility model belongs to the technical field of ground paving materials, relates to solid wood composite flooring, and in particular to an EB-cured polypropylene film-faced rubber wood core composite flooring. Background Art

[0002] Three-layer solid wood composite flooring is a three-layer structure solid wood composite flooring with solid wood plywood or veneer as the panel, solid wood plywood as the core layer, and veneer as the bottom layer. It has a high thickness of at least 2mm and has high requirements for the surface material and quality.

[0003] Rubber trees (Hevea brasiliensis) are widely cultivated in tropical my country and Southeast Asia, representing a significant commodity timber source from tropical plantations. Annually, over 10 million cubic meters of rubberwood are produced through regeneration. Rubberwood is a diffuse-porous material with a low drying shrinkage, easy processing, and a pleasing grain. It is currently widely used in furniture, finger-jointed laminate flooring, toys, and other wood products, making it a key commodity timber source from plantations. However, the yield of solid wood flooring produced from rubberwood has historically been low, resulting in its limited direct application in the solid wood flooring market. Instead, rubberwood veneer-coated composite flooring is more common in the market.

[0004] Chinese patent CN221194087U discloses a three-layer floor with a rubber wood core, comprising finger-jointed rubber wood materials, wherein a first grid buffer layer is provided on the upper surface of the finger-jointed rubber wood materials, a surface layer is provided on the upper surface of the first grid buffer layer, a second grid buffer layer is provided on the lower surface of the finger-jointed rubber wood materials, and a bottom plate is provided on the lower surface of the second grid buffer layer. The finger-jointed rubber wood materials are used as the core plate of the three-layer floor. The rubber wood material is fine and smooth after finger-jointing. The first grid buffer layer and the second grid buffer layer play a role in preventing cracking and balancing the upper and lower tensions, thereby solving the problem of easy cracking of the surface layer and the bottom plate, and improving the quality of the floor.

[0005] Chinese patent CN116461173A discloses a carbonized rubberwood core floor and its preparation method. The floor comprises carbonized rubberwood, a top layer integrally positioned on the upper outer surface of the carbonized rubberwood, and a bottom plate integrally positioned on the lower outer surface of the carbonized rubberwood. The top layer is a panel with a thickness of 0.6 to 3.0 mm. The carbonized rubberwood and bottom plate are used in combination. A composite panel is integrally positioned within the carbonized rubberwood. The composite panel comprises glass fiber reinforcement, a moisture-proof board, an antistatic board, and a calcium silicate board. The utility model utilizes a low-temperature hot pressing process, with a single-step hot pressing process. The three-layer rubberwood core floor has a short production cycle, strong operability, stable performance, and is suitable for geothermal environments. The carbonized rubberwood core floor has a simple structure, is easy to operate, and offers better performance than traditional methods.

[0006] Chinese patent CN219229402U discloses a veneer-faced rubberwood board with a composite color digital printing and paint decoration. The material layer structure includes: a finger-jointed rubberwood integrated board layer in the center layer, and a special veneer layer that is repair-free, anti-deformation, and anti-cracking, symmetrically superimposed and composited on both sides of the finger-jointed rubberwood integrated board layer from the inside out, a color-correcting and concealing primer composite coating, and a color-digital printing and paint composite decorative colored topcoat composite coating. This improves the material layer structure and finishing process of traditional rubberwood boards, solving the problem of repair-free appearance quality defects encountered when the color digital printing decoration process is applied to finger-jointed rubberwood integrated boards, as well as the problem of the board warping, deformation, and cracking irregularly. It also improves the designability of the rubberwood board's surface decorative texture, color, and other aesthetic elements, as well as the wood feel, real naturalness, and high degree of simulation, making it suitable for the production of high-end solid wood furniture. Summary of the Invention

[0007] In order to better utilize rubber wood, the utility model discloses an EB-cured polypropylene film-faced rubber wood core composite floor.

[0008] Technical Solution

[0009] The invention discloses an EB-cured polypropylene film-faced rubberwood core composite flooring, wherein a rubber coating layer is provided between a surface decorative layer and an improved three-layer rubberwood core solid wood composite flooring base layer, wherein the surface decorative layer is an EB-cured polypropylene film, and the rubberwood core solid wood composite flooring base layer has a thickness of 10 to 18 mm and sequentially comprises a substrate surface layer, a substrate core layer and a substrate bottom layer, and is pressed into an integrated sandwich structure with a crisscross texture, wherein the substrate core layer is a rubberwood plain finger-jointed integrated board, and the rubberwood plain finger-jointed integrated board is a double-sided fixed-thickness sanded plain finger-jointed integrated board in which rubberwood strips are finger-jointed end-to-end for lengthening and flat-jointed side-to-side for widthening, with a net length and width dimension of 1230 to 1250 mm×1930 to 2440 mm and a net thickness dimension of 8 to 13 mm.

[0010] In a preferred disclosed example of the present invention, the thickness of the surface decoration layer is 0.27±0.05 mm.

[0011] Furthermore, the EB-cured polypropylene film is a film made of polypropylene as raw material using an electron beam curing process. The surface not only contains the texture of wood, but also has paint, a special plane and an antique effect, so that the wood texture and the paint effect are compounded, and it has natural wood texture, antique effect, and paint treatment effect. The texture is real and the visual touch is close to that of wood.

[0012] In the preferred disclosed example of the present invention, the coating layer is a polyurethane resin hot melt adhesive solidified layer with a thickness of 0.1 to 0.2 mm, which overcomes the problem that the film is prone to surface defects on rough wood surfaces, and a lower coating amount can achieve better bonding strength.

[0013] In the preferred disclosed examples of the present invention, the surface thickness of the substrate is 1 to 3 mm, and the moisture content is 8 to 12%. It is a rotary cut veneer made of birch, maple, pine, etc. Furthermore, a rotary cut or sawn thin plate of high-quality hard broadleaf wood is selected, which is required to be hard, resistant to pressure, and have beautiful texture and uniform color.

[0014] In a preferred disclosed embodiment of the present invention, the rubber wood is soaked in a chemical solution to prevent mildew and insects, subjected to heat treatment, and dried.

[0015] Furthermore, the rubber wood strips have a length of 100 to 150 mm, a width of 50 to 90 mm, a thickness of 8 to 13 mm, and a moisture content of 8 to 12%.

[0016] Furthermore, the gap between the strips of the rubber wood plain finger-jointed integrated board is no more than 1 mm.

[0017] In a preferred disclosed example of the present invention, the bottom layer of the substrate has a thickness of 0.6 to 2.0 mm and a moisture content of 8 to 12%, and is made of birch, maple, pine, or the like.

[0018] The tongue and groove structure of the composite floor of the utility model adopts a locking connection form.

[0019] The utility model is a composite board made of an improved rubber wood core solid wood composite flooring base and an EB-cured polypropylene film. It inherits the elegant and natural characteristics of solid wood boards. From the perspective of protecting forest resources, it is an alternative product to solid wood boards and can effectively reduce the consumption of wood. It has good waterproofness, water resistance, stability, decorativeness, durability, etc. The main body of the base material adopts the finger-jointing method of the rubber wood core, which makes full use of the wood. The finger-jointed strip-shaped small pieces can effectively avoid defective positions, retaining the texture of natural wood, and having the characteristics of high strength, good fire resistance, high thermal insulation performance, uniform moisture content, small deformation, etc. It maximizes the use of wood, selects the best, and maximizes the performance of wood, so that small wood can be used for big purposes and inferior wood can be used for good purposes, which promotes the protection of forestry resources.

[0020] Beneficial effects

[0021] The EB-cured polypropylene film-faced rubberwood core composite flooring disclosed in the utility model is a polypropylene film cured by the ElectronBeam process and having a wood texture, antique effect, and paint treatment effect, attached to the improved rubberwood core composite flooring base layer. This flooring inherits the elegant and natural characteristics of solid wood boards. From the perspective of protecting forest resources, it is an alternative product to solid wood boards, effectively reducing wood consumption, resolving the tense situation of forest resource shortage and thus protecting natural resources. Compared with existing composite flooring, it has a simpler process, is more environmentally friendly, and has a relatively low overall cost. Polyurethane hot-melt adhesive is used to bond the surface layer and the base layer together, achieving a fast bonding speed and enabling assembly line production. No substances harmful to the human body or the environment are released during or after bonding, allowing the composite flooring to inherit the elegant and natural characteristics of solid wood boards and have excellent waterproofness, water resistance, stability, decorativeness, and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 .Schematic diagram of the structure of EB-cured polypropylene film-faced rubber wood core composite flooring,

[0023] Figure 2 . Schematic diagram of the cross-section of the improved bakelite core composite flooring base layer arrangement,

[0024] Figure 3 .Schematic diagram of the structure of EB-cured polypropylene film-faced rubber wood core composite flooring.

[0025] Among them, the components are marked as follows: 1. Surface decoration layer; 2. Glue coating layer; 3. Improved bakelite core composite floor base layer; 4. Base material bottom layer; 5. Base material core layer; 6. Base material surface layer. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the embodiments so that those skilled in the art can better understand the present invention. However, the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] A rubber wood core composite flooring with an EB-cured polypropylene film finish has a coating layer 2 provided between a surface decorative layer 1 and an improved three-layer rubber wood core composite flooring base layer 3. The surface decorative layer 1 is an EB-cured polypropylene film. The rubber wood core composite flooring base layer 3 has a thickness of 10 to 18 mm and sequentially comprises a substrate surface layer 6, a substrate core layer 5, and a substrate bottom layer 4, which are pressed into an integrated sandwich structure with a crisscross texture. The substrate core layer 5 is a finger-jointed integrated board made of rubber wood plain surface.

[0029] Example 2

[0030] A rubber wood core composite flooring with an EB-cured polypropylene film finish is provided. A coating layer 2 is provided between a surface decorative layer 1 and an improved three-layer rubber wood core solid wood composite flooring base layer 3. The surface decorative layer 1 is an EB-cured polypropylene film with a thickness of 0.27±0.05 mm. The coating layer 2 is a polyurethane resin hot melt adhesive cured layer with a thickness of 0.1-0.2 mm. The rubber wood core solid wood composite flooring base layer 3 has a thickness of 10-18 mm and sequentially comprises a substrate surface layer 6, a substrate core layer 5 and a substrate bottom layer 4, which are pressed into an integrated sandwich structure with a crisscross texture. The substrate core layer 5 is a finger-jointed integrated board made of rubber wood plain surface.

[0031] Example 3

[0032] The invention discloses an EB-cured polypropylene film-faced rubberwood core composite flooring. A coating layer 2 is provided between a surface decorative layer 1 and an improved three-layer rubberwood core solid wood composite flooring base layer 3. The surface decorative layer 1 is an EB-cured polypropylene film with a thickness of 0.27±0.05 mm. The coating layer 2 is a cured layer of polyurethane resin hot-melt adhesive with a thickness of 0.1-0.2 mm. The rubberwood core solid wood composite flooring base layer 3 has a thickness of 10-18 mm and sequentially comprises a substrate surface layer 6, a substrate core layer 5, and a substrate bottom layer 4, which are pressed into an integrated sandwich structure with a crisscross texture. The substrate surface layer 6 has a thickness of 1-3 mm and a moisture content of 8-12%, and is made of birch, maple, or pine peeled veneer. The substrate core layer 5 is a rubberwood plain finger-jointed integrated board. The substrate bottom layer 4 has a thickness of 0.6-2.0 mm and a moisture content of 8-12%, and is made of birch, maple, or pine.

[0033] Example 4

[0034] A rubber wood core composite floor with an EB-cured polypropylene film finish, wherein a coating layer 2 is provided between a surface decorative layer 1 and an improved three-layer rubber wood core solid wood composite floor base layer 3, wherein the surface decorative layer 1 is an EB-cured polypropylene film with a thickness of 0.27±0.05 mm; the coating layer 2 is a polyurethane resin hot melt adhesive cured layer with a thickness of 0.1 to 0.2 mm; the rubber wood core solid wood composite floor base layer 3 has a thickness of 10 to 18 mm and sequentially comprises a substrate surface layer 6, a substrate core layer 5 and a substrate bottom layer 4, which are pressed into an integrated sandwich structure with a crisscross texture, wherein the substrate surface layer 6 The thickness is 1-3 mm, the moisture content is 8-12%, and it is made of birch, maple, or pine peeled veneer; the base material core layer 5 is a rubber wood plain finger-jointed integrated board, which is made of rubber wood that has been soaked in chemicals to prevent mildew and insects, heat-treated, and dried, and then processed into rubber wood strips. The boards are lengthened by end finger-jointing and integrated and widened by side flat-jointing. The boards have a net length and width of 1230-1250 mm × 1930-2440 mm and a net thickness of 8-13 mm, and are sanded on both sides; the base material bottom layer 4 is 0.6-2.0 mm thick, the moisture content is 8-12%, and it is made of birch, maple, or pine.

[0035] Example 5

[0036] The invention relates to an EB-cured polypropylene film-faced rubber wood core composite floor, wherein a coating layer 2 is provided between a surface decorative layer 1 and an improved three-layer rubber wood core solid wood composite floor base layer 3, wherein the surface decorative layer 1 is an EB-cured polypropylene film with a thickness of 0.27±0.05mm; the coating layer 2 is a polyurethane resin hot melt adhesive cured layer with a thickness of 0.1-0.2mm; the rubber wood core solid wood composite floor base layer 3 has a thickness of 10-18mm and comprises a substrate surface layer 6, a substrate core layer 5 and a substrate bottom layer 4 in sequence, and is pressed into an integrated sandwich structure with a crisscross texture, wherein the substrate surface layer 6 has a thickness of 1-3mm and a moisture content of 8-12%, and is made of single-piece peeled birch, maple or pine wood. The core layer 5 of the substrate is a plain finger-jointed integrated board made of rubber wood, which is processed into rubber wood strips after being soaked in a solution to prevent mildew and insects, heat-treated, and dried. The length of the rubber wood strips is 100-150 mm, the width is 50-90 mm, the thickness is 8-13 mm, and the moisture content is 8-12%. The strips are joined by end-to-end finger-jointing and side-to-side flat-jointing. The length and width net dimensions are 1230-1250 mm × 1930-2440 mm and the thickness net dimension is 8-13 mm. The gaps between the strips are not greater than 1 mm. The bottom layer 4 of the substrate is 0.6-2.0 mm thick and has a moisture content of 8-12%. It is made of birch, maple, or pine.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An EB-cured polypropylene film-faced rubber wood core composite flooring, wherein a rubber coating layer (2) is provided between a surface decorative layer (1) and an improved three-layer rubber wood core solid wood composite flooring base layer (3), characterized in that: The surface decorative layer (1) is an EB-cured polypropylene film, and the rubber wood core solid wood composite flooring base layer (3) has a thickness of 10 to 18 mm and comprises a substrate surface layer (6), a substrate core layer (5) and a substrate bottom layer (4) in sequence, and is pressed into an integrated sandwich structure according to a crisscross texture, wherein the substrate core layer (5) is a rubber wood plain finger-jointed integrated board, and the rubber wood plain finger-jointed integrated board is a rubber wood strip that is joined in length by end finger-jointing and integrated in width by side flat-jointing, and has a double-sided fixed-thickness sanded plain finger-jointed integrated board with a net length and width of 1230 to 1250 mm × 1930 to 2440 mm and a net thickness of 8 to 13 mm.

2. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The thickness of the surface decoration layer (1) is 0.27±0.05 mm.

3. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The adhesive coating layer (2) is a polyurethane resin hot melt adhesive solidified layer with a thickness of 0.1 to 0.2 mm.

4. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The substrate surface layer (6) has a thickness of 1 to 3 mm and a moisture content of 8 to 12%.

5. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The rubber wood strips have a length of 100 to 150 mm, a width of 50 to 90 mm, a thickness of 8 to 13 mm, and a moisture content of 8 to 12%.

6. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The rubber wood plain finger-jointed integrated board has a gap between the rubber wood strips that is no larger than 1 mm.

7. The EB-cured polypropylene film-faced rubber wood core composite flooring according to claim 1, characterized in that: The base material bottom layer (4) has a thickness of 0.6 to 2.0 mm and a moisture content of 8 to 12%.

8. The EB-cured polypropylene film-faced rubber wood core composite flooring according to any one of claims 1 to 7, characterized in that: The tongue and groove structure of the composite floor adopts a locking connection form.

Images