Compression densified flame-retardant wood composite floor

Abstract

The compression-densified flame-retardant wood composite floor comprises a bottom layer, a compression-densified plywood, a buffer layer, a decorative layer and a wear-resistant layer are sequentially arranged on the upper surface of the bottom layer, and the compression-densified plywood is formed by gluing a plurality of layers of compression-densified pine boards. Due to the fact that internal gaps of the wood are reduced through the compressed densified pine board, the compressed densified pine board is of a highly-compact wood structure, oxygen can be effectively prevented from entering the wood, combustion of the wood is delayed, meanwhile, a more compact and continuous carbon layer can be formed in the combustion process, heat transfer and oxygen diffusion are effectively prevented, and the service life of the wood is prolonged. Therefore, the compressed and densified pine board has good flame retardance and self-extinguishing property, and the flame retardant grade of the prepared compressed and densified flame-retardant wood composite floor can reach B1; and meanwhile, the structure of the flame-retardant wood composite floor can be more stable, and deformation of the compressed and densified flame-retardant wood composite floor is further reduced.

Description

Technical Field

[0001] The present application relates to the field of floor technology, and in particular to a compressed and densified flame-retardant wood composite floor. Background Art

[0002] Impregnated paper laminated wood flooring is made of one or more layers of special paper impregnated with thermosetting amino resin, which is laid on the surface of artificial board substrates such as particleboard and high-density fiberboard. A balancing layer is added on the back and a wear-resistant layer is added on the front. The floor is hot-pressed and formed. The compressed and densified flame-retardant wood composite flooring has the comfortable feel and stability of flame-retardant wood composite flooring, as well as the excellent properties of laminate flooring such as beauty and wear resistance. It is deeply favored by home consumers and has broad market prospects.

[0003] In order to improve the performance of impregnated paper laminated wood flooring, the utility model patent with announcement number CN215519714U discloses a thick-core compressed and densified flame-retardant wood composite flooring, including a wear-resistant layer, an impregnated paper layer, a buffer layer, a substrate layer and a bottom layer arranged in sequence from the surface to the bottom, and the two ends of the substrate layer are respectively provided with mutually matching locking structures.

[0004] However, for the above-mentioned thick-core compressed and densified flame-retardant wood composite floor, when a fire occurs, only high-density fiberboard is used as a buffer layer, which is difficult to resist the spread of fire and burns the base material layer to form flammable materials. It cannot meet the requirements of public places or high-rise residential buildings that wooden floors meet the national standard GB 8624-2012 "Combustion Performance Classification of Building Materials and Products" B1 grade flame-retardant materials, and may cause greater fire safety accidents.

[0005] In order to improve the flame retardant properties of wooden floors, flame retardants can be added to the wood and adhesives of wooden floors to make the wood a flame-retardant material. Depending on the treatment process, wood flame retardant methods can be divided into surface coating and impregnation treatment. Surface coating is to apply flame retardant coating on the surface of wood materials. The operation is simple and can effectively control the spread of fire. However, once the flame retardant coating is damaged or the coating ages and fails after long-term use, the flame retardant properties of the coating will disappear. Although there is no need to worry about the problem of damage to the protective layer in the impregnation treatment, the flame retardant can only be impregnated 1-2mm below the wood surface, and the impregnation method is only suitable for wood with good permeability, and the improvement of the flame retardant properties of wooden floors is limited. Summary of the invention

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a compressed and densified flame-retardant wood composite floor which can effectively improve the flame-retardant performance, and the technical solution adopted includes:

[0007] A compressed and densified flame-retardant wood composite floor comprises a bottom layer, the upper surface of which is provided with a compressed and densified board plywood, a buffer layer, a decorative layer and a wear-resistant layer in sequence, wherein the compressed and densified board plywood is formed by gluing several layers of compressed and densified pine boards.

[0008] An embodiment of the utility model adopts a technical solution to solve its technical problem: a compressed dense board plywood is further provided on the lower surface of the bottom layer, and the two compressed dense board plywoods on the upper and lower surfaces of the bottom layer are symmetrically distributed up and down.

[0009] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: two adjacent layers of compressed densified pine wood boards on the compressed densified board plywood are connected by melamine glue.

[0010] An embodiment of the utility model adopts a technical solution to solve its technical problem: the compressed densified board plywood is formed by gluing an odd number of compressed densified pine boards, and the adjacent two layers of compressed densified pine boards are arranged in a staggered manner horizontally and vertically.

[0011] An embodiment of the utility model adopts a technical solution to solve the technical problem as follows: the bottom layer is made of technical wood or beech wood.

[0012] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: the thickness of the bottom layer is 0.5 mm.

[0013] An embodiment of the utility model adopts a technical solution to solve the technical problem: the decorative layer is impregnated adhesive film paper.

[0014] A technical solution adopted by an embodiment of the utility model to solve the technical problem is: the buffer layer is a high-density fiberboard.

[0015] The beneficial effects of the utility model are as follows: the plywood is obtained by hot-pressing and gluing compressed and densified pine boards, and then hot-pressing and forming the plywood with a bottom layer, a buffer layer, a decorative layer and a wear-resistant layer; when a fire occurs and the compressed and densified plywood is burned, the compressed and densified pine boards reduce the internal voids of the wood, and the compressed and densified pine boards have a highly dense wood structure, which can effectively block oxygen from entering the wood and delay the burning of the wood; at the same time, a denser and continuous charcoal layer can be formed during the combustion process, thereby effectively blocking the transfer of heat and the diffusion of oxygen, so that the compressed and densified pine boards have good flame retardancy and self-extinguishing properties, so that the flame retardancy of the obtained compressed and densified flame-retardant wood composite floor can reach B1 level; at the same time, the structure of the flame-retardant wood composite floor can be made more stable, and the deformation of the compressed and densified flame-retardant wood composite floor can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of the compressed and densified flame-retardant wood composite floor described in the embodiment of the present application. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0019] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] Reference Figure 1 , an embodiment of the present application is proposed, the compressed and densified flame-retardant wood composite flooring described in this embodiment includes a bottom layer 10, the upper surface of the bottom layer 10 is sequentially provided with a compressed densified board plywood 20, a buffer layer 30, a decorative layer 40 and a wear-resistant layer 50, and the compressed densified board plywood 20 is formed by gluing several layers of compressed and densified pine wood boards 21.

[0023] The present application uses a compression densification process to compress and densify pine boards, and then uses the compressed and densified pine boards to perform hot-pressing gluing to obtain plywood, which is then hot-pressed with a bottom layer 10, a buffer layer 30, a decorative layer 40 and a wear-resistant layer 50. When a fire occurs and the compressed and densified board plywood 20 is burned, the compressed and densified board plywood 20 reduces the internal voids of the wood, and the highly dense wood structure formed can effectively block oxygen from entering the wood, delaying the burning of the wood. At the same time, a more dense and continuous carbon layer can be formed during the combustion process, thereby effectively blocking the transfer of heat and the diffusion of oxygen, so that the densified wood has good flame retardancy and self-extinguishing properties, so that the obtained compressed and densified flame-retardant wood composite floor can reach the flame retardancy of B1 level specified in GB 8624-2012 "Classification of Combustion Performance of Building Materials and Products", and can effectively avoid the problem of aging failure of the flame retardant coating and loss of flame retardant caused by the impregnation treatment;

[0024] The present application utilizes a combination of impregnated paper wood flooring and flame-retardant wood composite flooring, which has the advantages of good wear resistance of compressed and densified flame-retardant wood composite flooring, as well as the advantages of comfortable foot feel and stable structure of flame-retardant wood composite flooring. The density of the compressed and densified pine board in this embodiment is increased, which further improves the compressive strength and carbon layer structure of the pine board, making the structure of the flame-retardant wood composite flooring more stable, and further reducing the deformation of the compressed and densified flame-retardant wood composite flooring.

[0025] In this embodiment, the compressed densified pine board 21 is obtained by pre-heating a pine board with a thickness of 5 mm at 700 W for 100 seconds, and then hot-pressing the microwave-pretreated pine board at 10 MPa and 100° C. for 20 minutes.

[0026] When producing the compressed densified board plywood 20, multiple layers of compressed densified pine wood boards 21 are coated with adhesive and then overlapped, and then hot-pressed at 10 MPa and 100° C. for 5 minutes to obtain;

[0027] When the compressed and densified pine boards are hot-pressed and glued to produce plywood, during the gluing process of the compressed and densified pine boards 21, the adhesive of the plywood will have an impregnation effect on the surface of the compressed and densified pine boards 21. The adhesive fixes the microfibrils and cytoplasmic matrix in the cell walls on the surface of the compressed and densified pine boards 21, thereby achieving surface hydrophobicity, reducing the contact between the wood surface and moisture, and further improving the stability of the plywood.

[0028] In the present application, locking tenons and locking grooves (not shown in the drawings) are respectively provided on both sides of the compressed dense board plywood to facilitate the rapid buckling of two adjacent flame-retardant wood composite floors.

[0029] Preferably, a compressed dense board plywood 20 is further provided on the lower surface of the bottom layer 10, and the two compressed dense board plywood 20 on the upper and lower surfaces of the bottom layer 10 are symmetrically distributed up and down.

[0030] In this embodiment, the bottom layer 10 is made of 0.5 mm thick technological wood or beech. The technological wood and beech backboard have excellent hardness and strength, which can enhance the strength of the flame retardant wood composite floor, making it more durable and stable, and reducing the risk of deformation or cracking of the floor.

[0031] In the present embodiment, two compressed densified board plywood sheets 20 are symmetrically sandwiched between the upper and lower surfaces of the bottom layer 10, so that the compressed densified board plywood sheets 20 on the lower surface of the bottom layer 10 together with the compressed densified board plywood sheets 20 serve as the bottom structure of the compressed and densified flame-retardant wood composite floor, which is further beneficial to improving the strength, durability and stability of the flame-retardant wood composite floor; at the same time, the compressed densified board plywood sheets 20 arranged on the lower surface of the bottom layer 10 described in the present embodiment realize the bottom flame retardancy of the compressed and densified flame-retardant wood composite floor, avoid the good flame retardancy and self-extinguishing properties of the compressed and densified flame-retardant wood composite floor when encountering open flames or high temperatures, and prevent the rapid spread of fire, thereby improving the flame retardancy of the compressed and densified flame-retardant wood composite floor.

[0032] The two adjacent layers of compressed densified pine boards 21 on the compressed densified board plywood 20 are connected by melamine glue. Melamine glue has excellent flame retardant properties and basically has no volatile harmful components after curing, which is more environmentally friendly.

[0033] The compressed densified board plywood 20 is formed by gluing an odd number of compressed densified pine boards 21 together, and two adjacent layers of compressed densified pine boards 21 are arranged in a staggered manner horizontally and vertically.

[0034] In this embodiment, the compressed densified board plywood 20 is formed by gluing an odd number of layers of compressed densified pine boards 21, and the two adjacent layers of compressed densified pine boards 21 are arranged in a horizontal and vertical staggered manner, so that the structure of the compressed densified board plywood 20 is more stable, and the bottom layer 10 and the two adjacent layers of compressed densified pine boards 21 are arranged in a horizontal and vertical staggered manner, and the buffer layer 30 and the adjacent compressed densified pine boards 21 are arranged in a horizontal and vertical staggered manner, thereby improving the structural stability of the flame-retardant wood composite floor.

[0035] The decorative layer 40 is made of impregnated film paper, which has clear and natural texture, various texture colors, lifelike imitation of solid wood, anti-oxidation, anti-ultraviolet radiation, anti-fading, and long service life.

[0036] The buffer layer 30 is a high-density fiberboard. In this embodiment, the thickness of the high-density fiberboard of the buffer layer 30 is 1.2 mm. Therefore, the high-density fiberboard is used as the buffer layer 30 to avoid direct gluing of the impregnated paper and the substrate layer. The density of the high-density fiberboard is ≥850 kg / m 3 .

[0037] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A compressed and densified flame-retardant wood composite floor, characterized in that: The invention comprises a bottom layer (10), wherein the upper surface of the bottom layer (10) is provided with a compressed densified board plywood (20), a buffer layer (30), a decorative layer (40) and a wear-resistant layer (50) in sequence, and the compressed densified board plywood (20) is formed by gluing together a plurality of layers of compressed densified pine boards (21).

2. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The lower surface of the bottom layer (10) is also provided with a compressed dense board plywood (20), and the two compressed dense board plywoods (20) on the upper and lower surfaces of the bottom layer (10) are symmetrically distributed up and down.

3. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: Two adjacent layers of compressed densified pine wood boards (21) on the compressed densified board plywood (20) are connected by using melamine glue.

4. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The compressed densified board plywood (20) is formed by gluing an odd number of layers of compressed densified pine boards (21), and two adjacent layers of compressed densified pine boards (21) are arranged in a staggered manner in the horizontal and vertical directions.

5. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The bottom layer (10) is made of technical wood or beech wood.

6. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The thickness of the bottom layer (10) is 0.5 mm.

7. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The decorative layer (40) is impregnated adhesive film paper.

8. The compressed and densified flame-retardant wood composite floor according to claim 1, characterized in that: The buffer layer (30) is a high-density fiberboard.

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