High-strength multilayer composite board

Abstract

The utility model discloses a high-strength multilayer composite board. One structure is sequentially composed of a melamine impregnated paper layer, a first solid wood chip repeated stacking layer, a second solid wood chip repeated stacking layer, a first solid wood chip repeated stacking layer, a second solid wood chip repeated stacking layer, a first solid wood chip repeated stacking layer and a second solid wood chip repeated stacking layer from bottom to top. The first solid wood sheet repeated overlapping layer and the melamine impregnated paper layer are compounded; the first solid wood chip repeated overlapping layer is formed by repeatedly overlapping two layers of transverse wood grain solid wood chips, and the second solid wood chip repeated overlapping layer is formed by repeatedly overlapping three layers of longitudinal wood grain solid wood chips. The surface of the floor is not prone to cracking, and the floor is resistant to abrasion, good in strength and stability, free of formaldehyde and good in environment friendliness. The integral strength of the device is very high; the bearing strength in the longitudinal direction is improved in a targeted mode, and the problem of bending deformation in the longitudinal direction is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of composite wood boards, in particular to a high-strength multi-layer composite board. Background Art

[0002] At present, multi-layer solid wood composite board is widely used in the field of furniture manufacturing. Multi-layer solid wood composite board is made of three or more layers of single board or thin board wood board glued and hot pressed. Compared with ordinary plywood, multi-layer solid wood composite board has the advantages of small deformation, high strength, good internal quality and good flatness. It can be produced in different thicknesses, with criss-crossed multi-layer plywood as the base material, and solid wood veneer or technical wood as the surface, and is made through cold pressing, hot pressing, sanding and other processes.

[0003] In the prior art, the structure of a multi-layer solid wood composite board usually includes a solid wood substrate and a surface decoration layer pasted on the solid wood substrate. The solid wood substrate is composed of a plurality of transverse wood grain solid wood slices and a plurality of longitudinal wood grain solid wood slices alternately superimposed, glued and pressed. There are two main technical problems with this multi-layer solid wood composite board: first, after the surface decoration layer is pasted on the solid wood substrate, its surface is prone to cracking, is not wear-resistant, has insufficient strength and stability, and usually contains formaldehyde, which is environmentally friendly; second, in the prior art, the board used for furniture such as wardrobes is often in the shape of a long board. The longer the length of the board, the worse the bearing capacity of the board in the length direction. However, the bearing strength of the existing multi-layer solid wood composite board in the transverse and longitudinal directions is basically the same, and the bearing strength in the longitudinal direction is not specifically improved, which is prone to bending and deformation in the longitudinal direction; third, when the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are alternately superimposed, the strength of each layer of the transverse wood grain solid wood slices or the longitudinal wood grain solid wood slices is not high enough, resulting in the overall strength of the multi-layer solid wood composite board after forming is not high enough. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-strength multi-layer composite board based on the above-mentioned deficiencies in the prior art. The surface of the multi-layer composite board is not easy to crack, is wear-resistant, has good strength and stability, does not contain formaldehyde, and is environmentally friendly; the overall strength of the multi-layer composite board is very high; the multi-layer composite board specifically improves the bearing strength in the longitudinal direction, and is not prone to longitudinal bending deformation problems.

[0005] In order to solve the above technical problems, the first technical solution of the utility model is: a high-strength multi-layer composite board, which is composed of a melamine impregnated paper layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer and a melamine impregnated paper layer from bottom to top; the first solid wood slice repeated stacking layer is composed of two layers of horizontal wood grain solid wood slices repeatedly stacked, and the second solid wood slice repeated stacking layer is composed of three layers of longitudinal wood grain solid wood slices repeatedly stacked.

[0006] Preferably, a fireproof adhesive layer is coated between adjacent melamine impregnated paper layers and transverse wood grain solid wood slices, between adjacent transverse wood grain solid wood slices and longitudinal wood grain solid wood slices, between adjacent longitudinal wood grain solid wood slices and longitudinal wood grain solid wood slices, and between adjacent transverse wood grain solid wood slices and transverse wood grain solid wood slices, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer, the transverse wood grain solid wood slice or the longitudinal wood grain solid wood slice; in the high-strength multi-layer composite board, the melamine impregnated paper layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer and the melamine impregnated paper layer are bonded and compounded into one from bottom to top through the fireproof adhesive layer.

[0007] Preferably, the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are wood turning slices respectively; the melamine impregnated paper layer is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper and melamine impregnated surface paper from inside to outside.

[0008] Preferably, the overall thickness of the high-strength multi-layer composite board is 34 mm to 36 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 1.9 mm to 2.1 mm respectively, and the thickness of the melamine impregnated paper layer is 0.4 to 0.6 mm.

[0009] In order to solve the above technical problems, the second technical solution of the utility model is: a high-strength multi-layer composite board, which is composed of a melamine impregnated paper layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer, a second solid wood slice repeated stacking layer, a first solid wood slice repeated stacking layer and a melamine impregnated paper layer from bottom to top; the first solid wood slice repeated stacking layer is composed of two layers of horizontal wood grain solid wood slices repeatedly stacked, and the second solid wood slice repeated stacking layer is composed of three layers of longitudinal wood grain solid wood slices repeatedly stacked.

[0010] Preferably, a fireproof adhesive layer is coated between adjacent melamine impregnated paper layers and transverse wood grain solid wood slices, between adjacent transverse wood grain solid wood slices and longitudinal wood grain solid wood slices, between adjacent longitudinal wood grain solid wood slices and longitudinal wood grain solid wood slices, and between adjacent transverse wood grain solid wood slices and transverse wood grain solid wood slices, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer, the transverse wood grain solid wood slice or the longitudinal wood grain solid wood slice; in the high-strength multi-layer composite board, the melamine impregnated paper layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer, the second solid wood slice repeated superposition layer, the first solid wood slice repeated superposition layer and the melamine impregnated paper layer are bonded and compounded into one from bottom to top through the fireproof adhesive layer.

[0011] Preferably, the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are wood turning slices respectively; the melamine impregnated paper layer is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper and melamine impregnated surface paper from inside to outside.

[0012] Preferably, the overall thickness of the high-strength multi-layer composite board is 44 mm to 46 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 1.9 mm to 2.1 mm respectively, and the thickness of the melamine impregnated paper layer is 0.4 to 0.6 mm.

[0013] The beneficial effects of the utility model are as follows: first, since the bottom layer and the top layer of the utility model are both melamine impregnated paper layers, the surface is not easy to crack, is wear-resistant, has good strength and stability, does not contain formaldehyde, and is environmentally friendly; second, the utility model is compounded by alternatingly stacking 4 / 5 layers of the first solid wood slice repeating layer and 3 / 4 layers of the second solid wood slice repeating layer, and each layer of the first solid wood slice repeating layer is composed of two layers of transverse wood grain solid wood slices repeatedly stacked, and each layer of the second solid wood slice repeating layer is composed of three layers of longitudinal wood grain solid wood slices repeatedly stacked, which greatly enhances the strength of each layer of the first solid wood slice repeating layer and the second solid wood slice repeating layer, so that the overall strength of the multi-layer composite board is very high; third, the first solid wood slice repeating layer of the utility model is composed of two layers of transverse wood grain solid wood slices repeatedly stacked, and the second solid wood slice repeating layer is composed of three layers of longitudinal wood grain solid wood slices repeatedly stacked, which specifically improves the bearing strength in the longitudinal direction and is not prone to bending and deformation problems in the longitudinal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the hierarchical structure of the first embodiment.

[0015] Figure 2 This is a schematic diagram of the hierarchical structure of Example 2.

[0016] In the figure: 1. Melamine impregnated paper layer; 2. Horizontal wood grain solid wood slice; 3. Vertical wood grain solid wood slice; 100. Repeatedly stacked layer of the first solid wood slice; 200. Repeatedly stacked layer of the second solid wood slice. DETAILED DESCRIPTION

[0017] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings. Embodiment 1

[0018] like Figure 1 As shown, this embodiment is a high-strength multi-layer composite board, which is composed of a melamine impregnated paper layer 1, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100 and a melamine impregnated paper layer 1 from bottom to top; the first solid wood slice repeating layer 100 is composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and the second solid wood slice repeating layer 200 is composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked. It should be noted that the longitudinal wood grain solid wood slice 3 of the utility model refers to a solid wood slice with a longitudinal extension in the wood grain direction, and the transverse wood grain solid wood slice 2 refers to a solid wood slice with a transverse extension in the wood grain direction. Since the bottom layer and the top layer of the utility model are both melamine impregnated paper layers 1, the surface is not easy to crack, wear-resistant, has good strength and stability, does not contain formaldehyde, and is environmentally friendly; the utility model is compounded in a manner of alternatingly stacking 4 layers of first solid wood slices repeatedly stacked layers 100 and 3 layers of second solid wood slices repeatedly stacked layers 200, and each layer of the first solid wood slices repeatedly stacked layers 100 is composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and each layer of the second solid wood slices repeatedly stacked layers 200 is composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked, which greatly enhances the strength of each layer of the first solid wood slices repeatedly stacked layers 100 and the second solid wood slices repeatedly stacked layers 200, so that the overall strength of the multi-layer composite board is very high; the first solid wood slices repeatedly stacked layers 100 of the utility model are composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and the second solid wood slices repeatedly stacked layers 200 are composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked, which specifically improves the bearing strength in the longitudinal direction, and is not prone to bending and deformation problems in the longitudinal direction.

[0019] like Figure 1As shown, a fireproof adhesive layer is coated between adjacent melamine impregnated paper layers 1 and transverse wood grain solid wood slices 2, between adjacent transverse wood grain solid wood slices 2 and longitudinal wood grain solid wood slices 3, between adjacent longitudinal wood grain solid wood slices 3 and longitudinal wood grain solid wood slices 3, and between adjacent transverse wood grain solid wood slices 2 and transverse wood grain solid wood slices 2, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer 1, the transverse wood grain solid wood slices 2 or the longitudinal wood grain solid wood slices 3; in the high-strength multi-layer composite board, the melamine impregnated paper layer 1, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100 and the melamine impregnated paper layer 1 are bonded and compounded into one from bottom to top in sequence through the fireproof adhesive layer. For the type of fireproof glue, please refer to another invention patent ZL201910130885.X of the applicant. It is not easy to fall off during bonding, has good high temperature resistance, good wettability, good uniformity and high safety.

[0020] As a preferred method of high-strength multi-layer composite board, the transverse wood grain solid wood slice 2 and the longitudinal wood grain solid wood slice 3 are wood turning wood slices respectively; the melamine impregnated paper layer 1 is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper, and melamine impregnated surface paper from the inside to the outside. The phenolic resin glue impregnated bottom paper can play a mechanical role on the wood grain solid wood slice, and is the base material of the melamine impregnated paper layer 1; the melamine impregnated covering paper has excellent covering power and can cover the color spots on the surface of the phenolic resin glue impregnated bottom paper; the melamine impregnated decorative paper is a wood grain decorative paper, which mainly plays a decorative role and has good covering power, impregnation and printing properties; the melamine impregnated surface paper is placed on the top layer of the decorative board to protect the decorative paper, so that the board surface after heating and pressurization is highly transparent, and the board surface is hard and wear-resistant. This kind of paper requires good water absorption performance, white and clean, and transparent after impregnation.

[0021] As a preferred form of high-strength multi-layer composite board, the overall thickness of the high-strength multi-layer composite board is 34mm~36mm, preferably 35mm, the thickness of the transverse wood grain solid wood sheet 2 and the longitudinal wood grain solid wood sheet 3 are 1.9mm~2.1mm, preferably 2mm, respectively, and the thickness of the melamine impregnated paper layer 1 is 0.4~0.6mm, preferably 0.5mm. Embodiment 2

[0022] like Figure 2As shown, this embodiment is a high-strength multi-layer composite board, characterized in that: from bottom to top, it is composed of a melamine impregnated paper layer 1, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100, a second solid wood slice repeating layer 200, a first solid wood slice repeating layer 100 and a melamine impregnated paper layer 1; the first solid wood slice repeating layer 100 is composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and the second solid wood slice repeating layer 200 is composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked. It should be noted that the longitudinal wood grain solid wood slice 3 of the utility model refers to a solid wood slice with a longitudinal extension in the wood grain direction, and the transverse wood grain solid wood slice 2 refers to a solid wood slice with a transverse extension in the wood grain direction. Since the bottom layer and the top layer of the utility model are both melamine impregnated paper layers 1, the surface is not easy to crack, wear-resistant, has good strength and stability, does not contain formaldehyde, and is environmentally friendly; the utility model is compounded by alternatingly stacking 5 layers of first solid wood slices 100 and 4 layers of second solid wood slices 200, and each layer of the first solid wood slices 100 is composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and each layer of the second solid wood slices 200 is composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked, which greatly enhances the strength of each layer of the first solid wood slices 100 and the second solid wood slices 200, so that the overall strength of the multi-layer composite board is very high; the first solid wood slices 100 are composed of two layers of transverse wood grain solid wood slices 2 repeatedly stacked, and the second solid wood slices 200 are composed of three layers of longitudinal wood grain solid wood slices 3 repeatedly stacked, which specifically improves the bearing strength in the longitudinal direction, and is not prone to bending and deformation problems in the longitudinal direction.

[0023] like Figure 2As shown, a fireproof adhesive layer is coated between adjacent melamine impregnated paper layers 1 and transverse wood grain solid wood slices 2, between adjacent transverse wood grain solid wood slices 2 and longitudinal wood grain solid wood slices 3, between adjacent longitudinal wood grain solid wood slices 3 and longitudinal wood grain solid wood slices 3, and between adjacent transverse wood grain solid wood slices 2 and transverse wood grain solid wood slices 2, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer 1, the transverse wood grain solid wood slices 2 or the longitudinal wood grain solid wood slices 3; in the high-strength multi-layer composite board, the melamine impregnated paper layer 1, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100, the second solid wood slice repeated superposition layer 200, the first solid wood slice repeated superposition layer 100 and the melamine impregnated paper layer 1 are bonded and compounded into one from bottom to top in sequence through the fireproof adhesive layer. For the type of fireproof glue, please refer to another invention patent ZL201910130885.X of the applicant. It is not easy to fall off during bonding, has good high temperature resistance, good wettability, good uniformity and high safety.

[0024] As a preferred method of high-strength multi-layer composite board, the transverse wood grain solid wood slice 2 and the longitudinal wood grain solid wood slice 3 are wood turning wood slices respectively; the melamine impregnated paper layer 1 is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper, and melamine impregnated surface paper from the inside to the outside. The phenolic resin glue impregnated bottom paper can play a mechanical role on the wood grain solid wood slice, and is the base material of the melamine impregnated paper layer 1; the melamine impregnated covering paper has excellent covering power and can cover the color spots on the surface of the phenolic resin glue impregnated bottom paper; the melamine impregnated decorative paper is a wood grain decorative paper, which mainly plays a decorative role and has good covering power, impregnation and printing properties; the melamine impregnated surface paper is placed on the top layer of the decorative board to protect the decorative paper, so that the board surface after heating and pressurization is highly transparent, and the board surface is hard and wear-resistant. This kind of paper requires good water absorption performance, white and clean, and transparent after impregnation.

[0025] As a preferred form of high-strength multi-layer composite board, the overall thickness of the high-strength multi-layer composite board is 34mm~36mm, preferably 35mm, the thickness of the transverse wood grain solid wood sheet 2 and the longitudinal wood grain solid wood sheet 3 are 1.9mm~2.1mm, preferably 2mm, respectively, and the thickness of the melamine impregnated paper layer 1 is 0.4~0.6mm, preferably 0.5mm.

[0026] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A high-strength multi-layer composite plate, characterized in that: From bottom to top, it is composed of a melamine impregnated paper layer, a first solid wood slice repeatedly stacked layer, a second solid wood slice repeatedly stacked layer, a first solid wood slice repeatedly stacked layer, a second solid wood slice repeatedly stacked layer, a first solid wood slice repeatedly stacked layer, a second solid wood slice repeatedly stacked layer, a first solid wood slice repeatedly stacked layer and a melamine impregnated paper layer; the first solid wood slice repeatedly stacked layer is composed of two layers of horizontal wood grain solid wood slices repeatedly stacked, and the second solid wood slice repeatedly stacked layer is composed of three layers of vertical wood grain solid wood slices repeatedly stacked.

2. The high-strength multi-layer composite plate according to claim 1, characterized in that: A fireproof adhesive layer is coated between adjacent melamine impregnated paper layers and transverse wood grain solid wood slices, between adjacent transverse wood grain solid wood slices and longitudinal wood grain solid wood slices, between adjacent longitudinal wood grain solid wood slices and longitudinal wood grain solid wood slices, and between adjacent transverse wood grain solid wood slices and transverse wood grain solid wood slices, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer, the transverse wood grain solid wood slices or the longitudinal wood grain solid wood slices; in the high-strength multi-layer composite board, the melamine impregnated paper layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer and the melamine impregnated paper layer are bonded and compounded into one from bottom to top through the fireproof adhesive layer.

3. The high-strength multi-layer composite plate according to claim 1, characterized in that: The horizontal wood grain solid wood slices and the vertical wood grain solid wood slices are wood turning slices respectively; the melamine impregnated paper layer is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper and melamine impregnated surface paper from inside to outside.

4. The high-strength multi-layer composite panel according to any one of claims 1 to 3, characterized in that: The overall thickness of the high-strength multi-layer composite board is 34 mm to 36 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 1.9 mm to 2.1 mm respectively, and the thickness of the melamine impregnated paper layer is 0.4 mm to 0.6 mm.

5. The high-strength multi-layer composite plate according to claim 4, characterized in that: The overall thickness of the high-strength multi-layer composite board is 35 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 2 mm respectively, and the thickness of the melamine impregnated paper layer is 0.5 mm.

6. A high-strength multi-layer composite panel, characterized in that: From bottom to top, it is composed of a melamine impregnated paper layer, a first solid wood slice repeatedly superimposed layer, a second solid wood slice repeatedly superimposed layer, a first solid wood slice repeatedly superimposed layer, a second solid wood slice repeatedly superimposed layer, a first solid wood slice repeatedly superimposed layer, a second solid wood slice repeatedly superimposed layer, a first solid wood slice repeatedly superimposed layer and a melamine impregnated paper layer; the first solid wood slice repeatedly superimposed layer is composed of two layers of solid wood slices with horizontal wood grains repeatedly superimposed, and the second solid wood slice repeatedly superimposed layer is composed of three layers of solid wood slices with vertical wood grains repeatedly superimposed.

7. The high-strength multi-layer composite plate according to claim 6, characterized in that: A fireproof adhesive layer is coated between adjacent melamine impregnated paper layers and transverse wood grain solid wood slices, between adjacent transverse wood grain solid wood slices and longitudinal wood grain solid wood slices, between adjacent longitudinal wood grain solid wood slices and longitudinal wood grain solid wood slices, and between adjacent transverse wood grain solid wood slices and transverse wood grain solid wood slices, and the fireproof adhesive layer penetrates into the contact surface of the melamine impregnated paper layer, the transverse wood grain solid wood slices or the longitudinal wood grain solid wood slices; in the high-strength multi-layer composite board, the melamine impregnated paper layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer, the second solid wood slice repeating layer, the first solid wood slice repeating layer and the melamine impregnated paper layer are bonded and composited into one from bottom to top through the fireproof adhesive layer.

8. The high-strength multi-layer composite plate according to claim 6, characterized in that: The horizontal wood grain solid wood slices and the vertical wood grain solid wood slices are wood turning slices respectively; the melamine impregnated paper layer is composed of phenolic resin glue impregnated bottom paper, melamine impregnated covering paper, melamine impregnated decorative paper and melamine impregnated surface paper from inside to outside.

9. The high-strength multi-layer composite panel according to any one of claims 6 to 8, characterized in that: The overall thickness of the high-strength multi-layer composite board is 44 mm to 46 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 1.9 mm to 2.1 mm respectively, and the thickness of the melamine impregnated paper layer is 0.4 mm to 0.6 mm.

10. The high-strength multi-layer composite plate according to claim 9, characterized in that: The overall thickness of the high-strength multi-layer composite board is 45 mm, the thickness of the transverse wood grain solid wood slices and the longitudinal wood grain solid wood slices are 2 mm respectively, and the thickness of the melamine impregnated paper layer is 0.5 mm.

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