Double-layer solid wood composite floor

Abstract

The invention relates to the technical field of composite boards, and discloses a double-layer solid wood composite floor. Comprising a first formaldehyde-free plywood, an adsorption coating and an anti-virus coating, the surface of the first formaldehyde-free plywood is covered with the adsorption coating and the anti-virus coating, polyurethane glue is adopted at the joints of all the composite boards, and the polyurethane glue is an environment-friendly adhesive which is free of harmful substances such as formaldehyde and benzene and high in strength; the composite stability of all the boards can be effectively improved while no formaldehyde exists, the polyurethane foam board has excellent heat insulation performance, a porous structure in the polyurethane foam board can also provide a certain sound absorption effect, the anti-virus coating is arranged on the first formaldehyde-free plywood, the adsorption coating is arranged on the anti-virus coating, and the anti-virus coating is arranged on the second formaldehyde-free plywood. According to the arrangement, aldehyde substances possibly existing in air can be adsorbed by the adsorption coating, and meanwhile, the anti-virus coating is arranged, so that the aldehyde substances can be prevented from sinking to damage the composite board below the anti-virus coating.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of composite flooring, specifically a double-layer solid wood composite flooring. Background Art

[0002] Since the cost of solid wood flooring is relatively high, in order to reduce the production cost of the boards, it is often necessary to produce them through composite production of small boards or thin boards to obtain relatively low-cost composite boards. Composite boards refer to boards made of two or more materials.

[0003] Currently, composite boards are more commonly used in the process of decorating new homes. As people pay more attention to health and pay more attention to formaldehyde, benzene and other harmful gases during the decoration process, composite boards need to be more formaldehyde-free while improving the quality of composite boards. For this reason, we have proposed a double-layer solid wood composite floor.

[0004] Invention patent content

[0005] The purpose of this patent is to provide a double-layer solid wood composite floor to solve the problem raised in the above background technology that the current composite boards are mostly used in the process of decorating new homes. As people pay more attention to health and pay more attention to formaldehyde, benzene and other harmful gases during the decoration process, composite boards need to be more formaldehyde-free while improving the quality of composite boards.

[0006] To achieve the above purpose, the present invention provides the following technical solution: a double-layer solid wood composite floor, comprising:

[0007] The surface functional unit comprises a first formaldehyde-free plywood, an adsorption coating and an antiviral coating covering the surface thereof, wherein the adsorption coating is provided on the upper end of the first formaldehyde-free plywood, the lower end of the adsorption coating is fixedly connected to the antiviral coating, the antiviral coating is located on the upper end of the first formaldehyde-free plywood, the lower end of the first formaldehyde-free plywood is fixedly connected to a first medium-density fiberboard, and the contact ends of the first formaldehyde-free plywood and the first medium-density fiberboard are bonded with polyurethane glue;

[0008] Core buffer unit: a polyurethane foam board arranged below the surface functional unit, with the first wood cellulose board and the second wood cellulose board connected to the core buffer unit on both sides;

[0009] Base bearing unit: comprises a first medium-density fiberboard, the surface of which is provided with honeycomb holes and is bonded to the surface functional unit and the core buffer unit by polyurethane glue.

[0010] As a further preferred embodiment of the present technical solution, the core buffer unit further includes:

[0011] Bamboo fiber reinforcement layer: embedded inside the polyurethane foam board;

[0012] Diatom mud filler: The bottom end of the inner wall of the bamboo fiber reinforced layer is filled with a diatom mud filler, and the diatom mud filler is evenly distributed at the bottom end of the inner wall of the bamboo fiber reinforced layer. The number of the diatom mud fillers is set to several, and the several diatom mud fillers are symmetrical about the center of the bamboo fiber reinforced layer. The height of the diatom mud filler is consistent with the height of the bamboo fiber reinforced layer.

[0013] As a further preferred embodiment of the present technical solution, the base bearing unit further comprises a second medium density fiberboard, which is bonded to the second wood cellulose board by polyurethane glue.

[0014] As a further preferred embodiment of the present technical solution, a bottom functional unit is provided at the bottom of the base bearing unit, comprising:

[0015] The second formaldehyde-free plywood is coated with an antiviral coating and an adsorption coating in sequence;

[0016] The contact ends of the second cellulose board and the second medium density fiberboard are bonded with urethane glue, the end of the second medium density fiberboard away from the second cellulose board is fixedly connected with the second formaldehyde-free plywood, the contact ends of the second formaldehyde-free plywood and the second medium density fiberboard are bonded with polyurethane glue, and the second formaldehyde-free plywood and the second medium density fiberboard are bonded with polyurethane glue.

[0017] As a further preferred embodiment of the present technical solution, an interlocking structure is provided between the surface functional unit and the bottom functional unit, comprising:

[0018] Top column: vertically fixed to the surface of the first formaldehyde-free plywood and passing through the antiviral coating;

[0019] Docking groove: opened on the surface of the second formaldehyde-free plywood, forming an interference fit with the top column.

[0020] As a further preferred embodiment of the present invention, the honeycomb holes can be configured as regular hexagonal through holes with a hole diameter of 3-5 mm and a hole density of 15-20 holes / cm 2 .

[0021] As a further preferred embodiment of the present technical solution, the antiviral coating is a silver-loaded titanium dioxide nanocoating with a thickness of 10-15 μm.

[0022] As a further preferred embodiment of the present technical solution, the adsorption coating is an activated carbon-zeolite composite coating with a thickness of 20-30 μm.

[0023] The present invention provides a double-layer solid wood composite floor with the following beneficial effects:

[0024] (1) The present invention is composed of a first formaldehyde-free plywood, a first medium-density fiberboard and a polyurethane foam board, and polyurethane glue is used at the joints of each composite board. The polyurethane glue is formaldehyde-free, benzene-free and other harmful substances, and is a high-strength environmentally friendly adhesive. It can effectively improve the stability of the composite between each board while being formaldehyde-free. The polyurethane foam board has excellent thermal insulation performance, and its internal porous structure can also provide a certain sound absorption effect. An antiviral coating is provided above the first formaldehyde-free plywood, and an adsorption coating is provided above the antiviral coating. In this way, the adsorption coating can absorb formaldehyde substances that may exist in the air. At the same time, due to the provision of the antiviral coating, the sinking of formaldehyde substances can be effectively prevented from invading the composite board below.

[0025] (2) The present invention provides an antiviral coating on the top of the first formaldehyde-free plywood, and an adsorption coating on the top of the antiviral coating, so that the adsorption coating can adsorb aldehyde substances that may exist in the air. At the same time, the antiviral coating can effectively prevent the aldehyde substances from sinking and invading the composite board below it. Since a number of honeycomb holes are opened on the surface of the first medium-density fiberboard, such a paper honeycomb structure can effectively ensure the lightness of the composite board while ensuring its strength. At the same time, a diatom mud filler is fixedly connected to the bottom end of the inner wall of the bamboo fiber reinforcement layer. The diatom mud filler can adsorb pollutants such as formaldehyde and benzene in the surrounding air, purify the air, and avoid the problem of formaldehyde release. At the same time, the height of the diatom mud filler is consistent with the height of the bamboo fiber reinforcement layer, which can effectively ensure the flatness of its interior, thereby improving the quality of the obtained composite board. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the patent of this invention.

[0027] Figure 2 It is a schematic cross-sectional view of the overall structure of the patent of this invention.

[0028] Figure 3 This is a schematic diagram of the first medium density fiberboard structure of the patented invention.

[0029] Figure 4 This is a schematic diagram of the structure of the polyurethane foam board patented by this invention.

[0030] In the figure: 1. First formaldehyde-free plywood; 2. Adsorption coating; 3. Top column; 4. First wood cellulose board; 5. Bamboo fiber reinforcement layer; 6. First medium-density fiberboard; 7. Second wood cellulose board; 8. Antiviral coating; 9. Polyurethane foam board; 10. Second formaldehyde-free plywood; 11. Honeycomb hole; 12. Polyurethane glue; 13. Diatom mud filler; 14. Second medium-density fiberboard. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] The patent of this invention provides technical solutions: Figures 1 to 4 As shown, in this embodiment, a double-layer solid wood composite floor comprises:

[0033] The surface functional unit comprises a first formaldehyde-free plywood 1, an adsorption coating 2 and an antiviral coating 8 covering the surface thereof. The adsorption coating 2 is provided on the upper end of the first formaldehyde-free plywood 1, and the antiviral coating 8 is fixedly connected to the lower end of the adsorption coating 2. The antiviral coating 8 is located on the upper end of the first formaldehyde-free plywood 1, and the first medium-density fiberboard 6 is fixedly connected to the lower end of the first formaldehyde-free plywood 1. The contact ends of the first formaldehyde-free plywood 1 and the first medium-density fiberboard 6 are bonded with polyurethane glue 12.

[0034] Core buffer unit: a polyurethane foam board 9 provided below the surface functional unit, with the first wood cellulose board 4 and the second wood cellulose board 7 connected to its two sides respectively;

[0035] The base load-bearing unit comprises a first medium-density fiberboard 6 , a honeycomb hole 11 is provided on the surface of the first medium-density fiberboard, and is bonded to the surface functional unit and the core buffer unit by polyurethane glue 12 .

[0036] The bamboo fiber reinforcement layer 5 is embedded in the polyurethane foam board 9;

[0037] Diatom mud filler 13: The bottom end of the inner wall of the bamboo fiber reinforced layer 5 is filled with a diatom mud filler 13, and the diatom mud filler 13 is evenly distributed at the bottom end of the inner wall of the bamboo fiber reinforced layer 5. The number of diatom mud fillers 13 is set to be several, and the several diatom mud fillers 13 are symmetrical about the center of the bamboo fiber reinforced layer 5. The height of the diatom mud filler 13 is consistent with the height of the bamboo fiber reinforced layer 5. Since the bottom end of the inner wall of the bamboo fiber reinforced layer 5 is filled with the diatom mud filler 13, the diatom mud filler 13 can absorb pollutants such as formaldehyde and benzene in the surrounding air, purify the air, and avoid the problem of formaldehyde release. At the same time, the height of the diatom mud filler 13 is consistent with the height of the bamboo fiber reinforced layer 5, which can effectively ensure its internal flatness, thereby improving the quality of the obtained composite board.

[0038] The base supporting unit further includes a second medium density fiberboard 14 , which is bonded to the second wood cellulose board 7 via polyurethane glue 12 .

[0039] The bottom of the base bearing unit is provided with a bottom functional unit, including:

[0040] The second formaldehyde-free plywood 10 has its surface sequentially coated with an antiviral coating 8 and an adsorption coating 2;

[0041] The contact ends of the second cellulose board 7 and the second medium density fiberboard 14 are bonded by urethane glue 12, and the end of the second medium density fiberboard 14 away from the second cellulose board 7 is fixedly connected to the second formaldehyde-free plywood 10, and the contact ends of the second formaldehyde-free plywood 10 and the second medium density fiberboard 14 are bonded by polyurethane glue 12, and the second formaldehyde-free plywood 10 and the second medium density fiberboard 14 are bonded by polyurethane glue 12.

[0042] There is an interlocking structure between the surface functional unit and the bottom functional unit, including:

[0043] Top column 3: vertically fixed to the surface of the first formaldehyde-free plywood 1 and passing through the antiviral coating 8;

[0044] Docking groove: It is provided on the surface of the second formaldehyde-free plywood 10 and forms an interference fit with the top column 3.

[0045] The honeycomb holes 11 can be set as regular hexagonal through holes with a hole diameter of 3-5 mm and a hole density of 15-20 per cm 2 .

[0046] The antiviral coating 8 is a silver-loaded titanium dioxide nanocoating with a thickness of 10-15 μm.

[0047] The adsorption coating 2 is an activated carbon-zeolite composite coating with a thickness of 20-30 μm. Since the multiple layers of the composite board are composed of layers of different densities and materials, the strength and stability of the board can be improved.

[0048] This patent provides a double-layer solid wood composite floor, the specific working principle is as follows:

[0049] The composite board is composed of a first formaldehyde-free plywood 1, a first medium-density fiberboard 6 and a polyurethane foam board 9, and polyurethane glue 12 is used at the joints of each composite board. The polyurethane glue 12 is a high-strength environmentally friendly adhesive that is formaldehyde-free, benzene-free and other harmful substances. It can effectively improve the stability of the composite between each board while being formaldehyde-free. The polyurethane foam board 9 has excellent thermal insulation performance, and its internal porous structure can also provide a certain sound absorption effect, thereby meeting the needs of more households. An antiviral coating 8 is provided above the first formaldehyde-free plywood 1, and an adsorption coating 2 is provided above the antiviral coating 8. This arrangement allows the adsorption coating 2 to adsorb aldehyde substances that may exist in the air. At the same time, due to the provision of the antiviral coating 8, the aldehyde substances can be effectively prevented from sinking and invading the composite board below it. A number of honeycomb holes 11 are provided on the surface of the first medium-density fiberboard 6. Such a honeycomb structure can effectively ensure the lightness of the composite board while ensuring its strength. At the same time, a diatom mud filler 13 is fixedly connected to the bottom end of the inner wall of the bamboo fiber reinforced layer 5. The diatom mud filler 13 can adsorb pollutants such as formaldehyde and benzene in the surrounding air, purify the air, and avoid the problem of formaldehyde release. At the same time, the height of the diatom mud filler 13 is consistent with the height of the bamboo fiber reinforced layer 5, which can effectively ensure the flatness of its interior and improve the quality of the obtained composite board.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer solid wood composite floor, characterized in that: Including stacked from top to bottom: The surface functional unit comprises a first formaldehyde-free plywood (1), an adsorption coating (2) and an antiviral coating (8) covering the surface thereof, wherein the upper end of the first formaldehyde-free plywood (1) is provided with the adsorption coating (2), the lower end of the adsorption coating (2) is fixedly connected to the antiviral coating (8), the antiviral coating (8) is located at the upper end of the first formaldehyde-free plywood (1), the lower end of the first formaldehyde-free plywood (1) is fixedly connected to a first medium-density fiberboard (6), and the contact ends of the first formaldehyde-free plywood (1) and the first medium-density fiberboard (6) are bonded with polyurethane glue (12); Core buffer unit: a polyurethane foam board (9) provided below the surface functional unit, with two sides thereof respectively connected to a first wood cellulose board (4) and a second wood cellulose board (7); The base load-bearing unit comprises a first medium-density fiberboard (6), the surface of which is provided with honeycomb holes (11) and is bonded to the surface functional unit and the core buffer unit via polyurethane glue (12).

2. The floor according to claim 1, characterized in that: The core buffer unit also includes: Bamboo fiber reinforcement layer (5): embedded in the polyurethane foam board (9); Diatom mud filler (13): The bottom end of the inner wall of the bamboo fiber reinforced layer (5) is filled with a diatom mud filler (13), and the diatom mud filler (13) is evenly distributed on the bottom end of the inner wall of the bamboo fiber reinforced layer (5). The number of the diatom mud filler (13) is set to be several, and the several diatom mud fillers (13) are symmetrical about the center of the bamboo fiber reinforced layer (5). The height of the diatom mud filler (13) is consistent with the height of the bamboo fiber reinforced layer (5).

3. The floor according to claim 1, characterized in that: The base bearing unit further comprises a second medium density fiberboard (14) bonded to the second wood cellulose board (7) via polyurethane glue (12).

4. The floor according to claim 3, characterized in that: The bottom of the base supporting unit is provided with a bottom functional unit, including: a second formaldehyde-free plywood (10), the surface of which is sequentially coated with an antiviral coating (8) and an adsorption coating (2); A second formaldehyde-free plywood (10) is fixedly connected to one end of the second medium-density fiberboard (14) away from the second wood cellulose board (7), and the contact ends of the second formaldehyde-free plywood (10) and the second medium-density fiberboard (14) are bonded with polyurethane glue (12), and the second formaldehyde-free plywood (10) and the second medium-density fiberboard (14) are bonded by the polyurethane glue (12).

5. The floor according to claim 4, characterized in that: An interlocking structure is provided between the surface functional unit and the bottom functional unit, comprising: Top column (3): vertically fixed to the surface of the first formaldehyde-free plywood (1) and passing through the antiviral coating (8); The docking groove is provided on the surface of the second formaldehyde-free plywood (10) and forms an interference fit with the top column (3).

6. The floor according to claim 1, characterized in that: The honeycomb holes (11) can be set as regular hexagonal through holes with a hole diameter of 3-5 mm and a hole density of 15-20 per cm 2 .

7. The floor according to claim 1, characterized in that: The antiviral coating (8) is a silver-loaded titanium dioxide nanocoating with a thickness of 10-15 μm.

8. The floor according to claim 1, characterized in that: The adsorption coating (2) is an activated carbon-zeolite composite coating with a thickness of 20-30 μm.

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