Anti-warping environment-friendly floor

Abstract

The utility model relates to the related technical field of environment-friendly floors, and discloses an anti-warping environment-friendly floor which comprises a base material layer, a wear-resistant layer, a damp-proof layer, a balance layer and a locking mechanism. The base material layer is composed of a high-density plant fiber board. According to the utility model, the fibers of the balance layer and the base material layer are orthogonally arranged to form a sandwich-like structure, so that the bidirectional flexural rigidity is improved, a breathing type humidity adjusting system is formed through the breathable micropores and the moisture-proof layer, so that the purpose of dynamically balancing the humidity is achieved, and the additional bamboo fiber balance layer adopts a physical pressing process without an adhesive, so that the production cost is reduced. By combining formaldehyde-free glue of an HDF base material, the formaldehyde release amount is close to zero, so that the purpose of environmental protection is achieved, and a glue-free lock catch system is formed by optimizing the matching angle of a trapezoidal tenon and a chamfer groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of environmental protection floor especially a kind of anti-warping environmental protection floor. BACKGROUND

[0002] With the popularization of green building concept, environmental protection floor gradually becomes market mainstream due to the characteristics such as low volatile organic compounds VOC emission, renewable material application, however, the existing environmental protection floor still faces significant technical bottleneck in realizing anti-warping performance.

[0003] Existing traditional environmental protection base material such as bamboo wood fiber, plant-based resin meets environmental protection requirement, but is significantly influenced by humidity and temperature change. When environmental humidity>70% or temperature fluctuation exceeds ±15 ℃, interlayer expansion coefficient difference easily causes stress concentration, leading to floor edge warping rate exceeding 0.8mm / m according to GB / T 24508-2020 standard, seriously affects paving flatness and service life, in addition, floor due to the existence of adhesive and other substances, leading to formaldehyde release problem affects environmental protection, in order to solve the above problems, a kind of anti-warping environmental protection floor is presented. SUMMARY

[0004] The utility model provides a kind of anti-warping environmental protection floor, it solves the problems in the above background technology.

[0005] The utility model solves its technical problem and is realized by the following technical scheme:

[0006] A kind of anti-warping environmental protection floor, including base material layer, wear-resistant layer, moisture-proof layer, balance layer, locking mechanism;

[0007] The base material layer is made of high-density plant fiber board;

[0008] The wear-resistant layer is covered on the upper surface of the base material layer, and is formed by melamine impregnated paper compression;

[0009] The moisture-proof layer is bonded to the lower surface of the base material layer, and the material is polyethylene film;

[0010] The balance layer is located below moisture-proof layer, and is made of cross-arranged bamboo fiber composite material;

[0011] The locking mechanism is arranged on the long side and short side of floor, including tongue and groove;

[0012] The fiber direction of the balance layer is perpendicular to the base material layer, and the thickness of the balance layer is 1 / 3-1 / 2 of the base material layer.

[0013] Preferably, the cross section of the tongue is trapezoidal, and the inner wall of the groove is provided with a chamfer matched with the tongue.

[0014] Preferably, the moisture-proof layer and the balancing layer are bonded together by a hot melt adhesive layer.

[0015] Preferably, the substrate layer has breathable micropores on its side.

[0016] Preferably, the wear-resistant layer surface is provided with a V-shaped water guide groove.

[0017] The advantages and positive effects of this utility model are as follows: the fiber orthogonal arrangement of the balancing layer and the substrate layer forms a "sandwich"-like structure, thereby improving the bidirectional bending stiffness. Furthermore, the breathable micropores and the moisture-proof layer form a "breathing" humidity regulation system, thereby achieving dynamic humidity balance. The additional bamboo fiber balancing layer uses a physical pressing process without adhesives, combined with the formaldehyde-free glue of the HDF substrate, to achieve formaldehyde release close to zero, thus achieving the goal of environmental protection. In addition, the trapezoidal tenon and the chamfered groove are matched with optimized angles to form a glue-free locking system. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 yes Figure 1 Top view.

[0021] The markings in the attached diagram are described below:

[0022] 1. Substrate layer; 11. Breathable micropores;

[0023] 2. Wear-resistant layer; 21. V-shaped water guide groove;

[0024] 3. Moisture-proof layer;

[0025] 4. Balancing layer;

[0026] 5. Locking mechanism; 51. Tenon; 52. Groove;

[0027] 6. Hot melt adhesive layer. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0029] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0030] Reference Figure 1 and Figure 2As the concept of green building becomes more widespread, environmentally friendly flooring, characterized by low volatile organic compound (VOC) emissions and the use of renewable materials, is gradually becoming the mainstream in the market. However, existing environmentally friendly flooring still faces significant technical bottlenecks in achieving anti-warping performance. While existing traditional environmentally friendly substrates such as bamboo and wood fiber and plant-based resins meet environmental requirements, they are significantly affected by humidity and temperature changes. When the ambient humidity is >70% or the temperature fluctuation exceeds ±15℃, the difference in the interlayer expansion coefficient can easily cause stress concentration, resulting in a warping rate at the floor edge exceeding 0.8mm / m (referring to GB / T 24508-2020 standard). This seriously affects the flatness of the installation and its service life. In addition, the presence of adhesives and other substances in the flooring leads to formaldehyde release, affecting its environmental friendliness. To solve the above problems, an anti-warping environmentally friendly flooring is proposed, comprising a substrate layer 1, a wear-resistant layer 2, a moisture-proof layer 3, a balancing layer 4, and a locking mechanism 5.

[0031] The substrate layer 1 is composed of high-density plant fiberboard;

[0032] The wear-resistant layer 2 covers the upper surface of the substrate layer and is formed by pressing melamine-impregnated paper together;

[0033] The moisture-proof layer 3 is bonded to the lower surface of the substrate layer and is made of polyethylene film;

[0034] The balancing layer 4 is located below the moisture-proof layer and is composed of cross-arranged bamboo fiber composite material;

[0035] The locking mechanism 5 is located on the long and short sides of the floor and includes a tenon 51 and a groove 52.

[0036] The fiber direction of the balancing layer 4 is perpendicular to that of the substrate layer 1, and the thickness of the balancing layer is 1 / 3 to 1 / 2 of that of the substrate layer. The balancing layer and the substrate layer are orthogonally arranged to form a "sandwich" structure, thereby improving the bidirectional bending stiffness. Furthermore, the breathable micropores and the moisture-proof layer form a "breathing" humidity regulation system, thereby achieving dynamic humidity balance. The additional bamboo fiber balancing layer uses a physical pressing process without adhesives, combined with the formaldehyde-free glue of the HDF substrate, to achieve formaldehyde release close to zero, thus achieving the goal of environmental protection. In addition, the trapezoidal tenon and the chamfered groove are combined with the angle optimization to form a glue-free locking system.

[0037] It should be noted that the substrate layer is prepared using an 8mm thick HDF board with a density ≥900kg / m³. 3 The side is machined with 0.2mm diameter breathable micropores 11 and the pore spacing is 6mm; the bamboo fiber balance layer 4 is pressed into the substrate layer using formaldehyde-free glue. The balance layer is 3mm thick and the bamboo fibers are arranged in a longitudinal and transverse cross with the substrate layer.

[0038] Further processing of the moisture-proof and wear-resistant layers: A 0.5mm melamine wear-resistant layer 2 is pressed onto the upper surface of the substrate layer at a pressing temperature of 180℃ and a pressure of 25MPa; a 25g / m² melamine wear-resistant layer is applied to the lower surface of the substrate layer using a hot melt adhesive machine. 2 The EVA hot melt adhesive 6 is used to bond the PE moisture-proof film 3 to the bamboo fiber balancing layer 4.

[0039] It should also be noted that the locking mechanism is formed as follows: trapezoidal tongues 51 and matching grooves 52 are machined on the four sides of the floor. The tongues are 4mm wide and the inner walls of the grooves are chamfered at 43°. An EPDM adhesive strip embedding groove with a width of 3.2mm is opened inside the tongue. The adhesive strip has a Shore A65 hardness.

[0040] Additionally, the V-shaped water channel 21 has a depth of 0.3mm and an inclination angle of 15°. The inside of the channel is coated with a hydrophobic nano-coating. This design ensures the hydrophobicity of the entire environmentally friendly floor.

[0041] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. An anti-warping eco-friendly floor, characterized by: It comprises a substrate layer (1), a wear-resistant layer (2), a moisture-proof layer (3), a balancing layer (4) and a locking mechanism (5). The substrate layer (1) is made of high-density plant fiberboard. The wear-resistant layer (2) is formed by pressing melamine impregnated paper on the upper surface of the substrate layer. The moisture-proof layer (3) is bonded to the lower surface of the substrate layer and is made of polyethylene film. The balancing layer (4) is located below the moisture-proof layer and is made of cross-arranged bamboo fiber composite material. The locking mechanism (5) is arranged on the long and short edges of the floor and comprises a tongue (51) and a groove (52). The fiber direction of the balancing layer (4) is perpendicular to the substrate layer (1), and the thickness of the balancing layer is 1 / 3-1 / 2 of the substrate layer.

2. The anti-warping environment-friendly floor according to claim 1, characterized in that: The cross section of the tongue (51) is trapezoidal, and the inner wall of the groove (52) is provided with a chamfer matching the tongue (51).

3. The anti-warping environment-friendly floor according to claim 1, characterized in that: The moisture-proof layer (3) and the balancing layer (4) are bonded by a hot melt adhesive layer (6).

4. The anti-warping environment-friendly floor according to claim 1, characterized in that: The side edges of the substrate layer (1) are provided with air-permeable micropores (11).

5. The anti-warping environment-friendly floor according to claim 1, characterized in that: The surface of the wear-resistant layer (2) is provided with V-shaped water guide grooves (21).

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