Eco-friendly composite soundproof wood panels

Abstract

This utility model discloses an eco-friendly composite sound-absorbing wood board, applied in the field of eco-friendly wood panel technology. The key technical points are: the eco-friendly composite sound-absorbing wood board includes a solid wood board body. Sound-absorbing buffer layers and sound-absorbing pads are respectively provided on the upper and lower surfaces of the solid wood board body. An eco-friendly substrate layer is provided on the side of the sound-absorbing buffer layer and sound-absorbing pads away from the solid wood board body. The technical effects are: FAS-grade oak, after micro-beveling, is placed in the core, preserving the natural feel underfoot while reducing single-sided moisture swelling; the 0.8–1.5 mm microporous EPDM and 1.5–3.0 mm IXPE form a "soft-hard-soft" gradient, causing shock waves to attenuate layer by layer, significantly reducing the impact sound pressure level; the 8–12 mm bamboo fiber-MDI adhesive substrate provides greater bending rigidity, and combined with a UV acrylic back coating protective layer, achieves bidirectional moisture protection; a 0.05–0.12 mm aluminum-plastic co-extruded film + pyrethroid microcapsule-camphor oil coating forms a closed-loop slow-release barrier at the tongue and groove, thereby achieving dimensional stability, sound absorption, and moisture protection.

Description

Technical Field

[0001] This utility model relates to the field of ecological board technology, specifically to ecological composite soundproof wood boards. Background Technology

[0002] Current flooring commonly uses a unidirectional laminated structure of "solid wood surface - plywood core - balancing layer," with the solid wood layer exposed on the outermost side. When the ambient humidity jumps from 30%RH in the dry season to 80%RH in the rainy season, the surface layer can expand by more than 6% in the tangential direction, while the core layer, due to its crisscrossing grain, only expands by about 2%. This difference in deformation between the top and bottom layers creates bending moments within the board, making it prone to warping and end cracking. Furthermore, this structure lacks continuous elastic damping, allowing footsteps to pass almost unimpeded through the rigid solid wood layer and plywood core, resulting in impact sound pressure levels often reaching 75dB, which fails to meet the residential noise reduction requirement of ≤53dB. In addition, traditional moisture-proofing measures only involve covering the back with a 0.05mm PE film. Ground moisture or residual moisture from cleaning can seep into the core layer along the seams, causing expansion and hydrolysis of the adhesive layer, further exacerbating warping and noise. Therefore, there is an urgent need for an eco-friendly composite sound-absorbing wood board that combines dimensional stability, quietness, and moisture resistance. Utility Model Content

[0003] The purpose of this utility model is to provide an eco-friendly composite soundproof wood board to solve the problem mentioned in the background art that there is an urgent need for an eco-friendly composite soundproof wood board that takes into account dimensional stability, sound insulation and moisture resistance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an eco-friendly composite soundproof wood board, comprising a solid wood board body, wherein a soundproof buffer layer and a soundproof pad layer are respectively provided on the upper and lower surfaces of the solid wood board body, an eco-friendly substrate layer is provided on the side of the soundproof buffer layer and the soundproof pad layer away from the solid wood board body, a moisture-proof vapor barrier layer is provided on the outer side of the two sides of the eco-friendly substrate layer, an insect-proof barrier layer is provided on the moisture-proof vapor barrier layer, and a back coating protective layer is provided on the outer side of the insect-proof barrier layer.

[0005] The present invention is further configured such that: the thickness of the solid wood board body is 3-6mm, it is made of FAS grade oak, and both the upper and lower surfaces are provided with a 0.2-0.5mm micro-bevel.

[0006] By adopting the above technical solution, the natural wood texture is preserved while the narrow thickness reduces the amount of moisture absorption and expansion on one side, and the micro-bevel can eliminate point contact between adjacent boards caused by thickness tolerance.

[0007] The present invention is further configured such that: the sound-absorbing buffer layer is a microporous EPDM rubber sheet with a thickness of 0.8 to 1.5 mm; and the sound-absorbing pad layer is an IXPE foam roll with a thickness of 1.5 to 3.0 mm.

[0008] Using the above technical solution, 0.8-1.5mm microporous EPDM rubber sheets and 1.5-3.0mm IXPE foam rolls are placed on both sides of a solid wood board to form a continuous "soft-hard-soft" elastic gradient. When the shock wave is transmitted downward, the EPDM first converts high-frequency energy into heat energy through the high-damping microporous structure, and the IXPE further attenuates the remaining low-frequency vibrations in the form of closed-cell airbags, ultimately minimizing the impact sound pressure level.

[0009] The present invention is further configured such that: the ecological substrate layer is a bamboo fiber-MDI glue high-density fiberboard with a thickness of 8-12mm.

[0010] Using the above technical solution, bamboo fiber-MDI adhesive high-density fiberboard with a thickness of 8-12mm and a density of not less than 850kg / m³ is used as the ecological substrate layer, so that the whole floor has a rigid frame that can bear 70% of the bending load, while the MDI formaldehyde-free adhesive reduces the formaldehyde release to below 0.025mg / m³.

[0011] The present invention is further configured such that: the moisture-proof and vapor-barrier layer is a 0.05-0.10mm thick aluminum foil-PE co-extruded composite film, which is bonded to the ecological substrate layer by hot melt adhesive.

[0012] Using the above technical solution, a 0.05-0.10 mm thick aluminum foil-PE co-extruded film is tightly attached to the outside of the ecological substrate layer. With the help of the near-zero water vapor transmission rate of aluminum foil (≤0.1 g / (m²·24h)), a continuous barrier is formed between the floor and the external moisture, cutting off the penetration channel of moisture along the thickness direction.

[0013] The present invention is further configured such that: the insect-proof barrier layer is composed of a 0.05-0.12mm thick aluminum-plastic co-extruded film and a pyrethroid microcapsule-camphor plant essential oil composite coating, with a coating dry weight of 3-8g / m².

[0014] Using the above technical solution, a 0.05-0.12mm thick aluminum-plastic co-extruded film is applied over the moisture-proof and vapor-barrier layer, and a composite coating containing pyrethroid microcapsules and camphor plant essential oil is applied to its surface. The microcapsules slowly release the active ingredients at room temperature, killing or repelling termites through a dual mechanism of contact and fumigation, so that the floor remains free from insects and borers for a long time.

[0015] The present invention is further configured such that: the back coating protective layer is a UV-cured acrylic waterproof coating with a dry film thickness of 20–35 μm.

[0016] Using the above technical solution, a 20–35 μm thick UV-cured acrylic back coating protective layer seals the entire bottom surface. The acrylic resin in the coating cross-links into a dense film layer, which can block moisture and chemicals. At the same time, the fine longitudinal and transverse air channels on the surface form microchannels after installation, which not only release residual stress but also prevent moisture accumulation, thereby further improving dimensional stability and service life.

[0017] This utility model provides an eco-friendly composite sound-absorbing wood panel. It has the following beneficial effects:

[0018] This invention utilizes FAS-grade oak, which is micro-beveled and placed in the core, to retain the natural feel underfoot while reducing one-sided swelling due to moisture. A "soft-hard-soft" gradient is formed by 0.8–1.5 mm microporous EPDM and 1.5–3.0 mm IXPE layers, causing shock waves to attenuate layer by layer and significantly reducing the impact sound pressure level. An 8–12 mm bamboo fiber-MDI adhesive substrate provides greater bending rigidity, which, combined with a UV acrylic back coating, achieves bidirectional moisture protection. A 0.05–0.12 mm aluminum-plastic co-extruded film with pyrethroid microcapsules and camphor oil coating forms a closed-loop slow-release barrier at the tongue and groove joint, thereby achieving dimensional stability, quiet operation, and moisture protection. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is an isometric side sectional view of the present invention;

[0021] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Solid wood board body; 2. Soundproof buffer layer; 3. Soundproof padding layer; 4. Eco-friendly substrate layer; 5. Moisture-proof vapor barrier layer; 6. Insect-proof barrier layer; 7. Back coating protective layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-3As shown, this utility model provides a technical solution: an eco-friendly composite sound-absorbing wood board, comprising a solid wood board body 1, the solid wood board body 1 having a thickness of 3-6mm, made of FAS grade oak, and with 0.2-0.5mm micro-bevels on both the upper and lower surfaces. While retaining the natural wood texture, the narrow thickness reduces the amount of moisture absorption and expansion on one side, while the micro-bevels eliminate point contact between adjacent boards caused by thickness tolerances. The upper and lower surfaces of the solid wood board body 1 are respectively provided with a sound-absorbing buffer layer 2 and a sound-absorbing pad layer 3. The sound-absorbing buffer layer 2 is a 0.8-1.5mm thick microporous EPDM rubber sheet; the sound-absorbing pad... Layer 3 is a 1.5–3.0 mm thick IXPE foam roll. Microporous EPDM rubber sheets of 0.8–1.5 mm and the 1.5–3.0 mm thick IXPE foam roll are placed on both sides of the solid wood board, forming a continuous "soft-hard-soft" elastic gradient. When the shock wave propagates downwards, the EPDM first converts high-frequency energy into heat energy through its high-damping microporous structure, and the IXPE further attenuates the remaining low-frequency vibrations in the form of closed-cell air pockets, ultimately minimizing the impact sound pressure level. An eco-friendly substrate layer 4 is provided on the side of both the sound-absorbing buffer layer 2 and the sound-absorbing pad layer 3 away from the solid wood board body 1. The ecological substrate layer 4 is an 8-12mm thick bamboo fiber-MDI adhesive high-density fiberboard. Using an 8-12mm thick bamboo fiber-MDI adhesive high-density fiberboard with a density of not less than 850kg / m³ as the ecological substrate layer provides the entire floor with a rigid frame sufficient to bear 70% of the bending load. At the same time, the MDI formaldehyde-free adhesive reduces the formaldehyde release to below 0.025mg / m³. A moisture-proof vapor barrier layer 5 is provided on the outer side of the ecological substrate layers (4) on both sides. The moisture-proof vapor barrier layer 5 is a 0.05-0.10mm thick aluminum foil-PE co-extruded composite film, which is bonded to the ecological substrate layer 4 with hot melt adhesive. A 0.05–0.10 mm thick aluminum foil-PE co-extruded film is tightly adhered to the outside of the ecological substrate layer. Utilizing the near-zero water vapor transmission rate of the aluminum foil (≤0.1 g / (m²·24h)), a continuous barrier is formed between the floor and external moisture, cutting off the penetration channels of moisture along the thickness direction. The moisture-proof vapor barrier layer 5 is equipped with an insect-proof barrier layer 6, which consists of a 0.05–0.12 mm thick aluminum-plastic co-extruded film and a pyrethroid microcapsule-camphor plant essential oil composite coating, with a dry weight of 3–8 g / m². An additional 0.05–0.12 mm thick layer is then applied over the moisture-proof vapor barrier layer.A 12mm thick aluminum-plastic co-extruded film is coated with a composite coating containing pyrethroid microcapsules and camphor plant essential oil. The microcapsules slowly release their active ingredients at room temperature, killing or repelling termites through a dual mechanism of contact and fumigation, keeping the floor free from insect infestation for a long time. A back coating protective layer 7 is provided on the outside of the termite-proof barrier layer 6. This back coating protective layer 7 is a UV-cured acrylic waterproof coating with a dry film thickness of 20–35μm. This 20–35μm thick UV-cured acrylic back coating protective layer seals the entire bottom surface. The acrylic resin in the coating cross-links into a dense film layer, which can block moisture and chemicals. Simultaneously, the fine longitudinal and transverse air-guiding grooves on the surface form microchannels after installation, releasing residual stress and preventing moisture accumulation, thereby further improving dimensional stability and service life.

[0025] Working principle: FAS grade oak is placed in the core after being micro-beveled, which retains the natural feel underfoot and reduces one-sided moisture swelling; the 0.8-1.5mm microporous EPDM and 1.5-3.0mm IXPE form a "soft-hard-soft" gradient, and the shock wave is attenuated layer by layer, which greatly reduces the impact sound pressure level; the 8-12mm bamboo fiber-MDI adhesive substrate provides greater bending rigidity, and together with the UV acrylic back coating protective layer, it achieves two-way moisture protection; the 0.05-0.12mm aluminum-plastic co-extruded film and pyrethroid microcapsule-camphor essential oil coating form a closed-loop slow-release barrier at the tongue and groove, thereby achieving the purpose of dimensional stability, quietness and moisture protection.

[0026] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eco-friendly composite soundproof wood panel, comprising a solid wood panel body (1), characterized in that: The solid wood board body (1) is provided with a sound-absorbing buffer layer (2) and a sound-absorbing pad layer (3) on its upper and lower surfaces respectively. The sound-absorbing buffer layer (2) and the sound-absorbing pad layer (3) are provided with an ecological substrate layer (4) on the side away from the solid wood board body (1). A moisture-proof and vapor barrier layer (5) is provided on the outside of the ecological substrate layer (4) on both sides. An insect-proof and ant-proof barrier layer (6) is provided on the moisture-proof and vapor barrier layer (5). A back coating protective layer (7) is provided on the outside of the insect-proof and ant-proof barrier layer (6).

2. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The thickness of the solid wood board body (1) is 3-6mm, it is made of FAS grade oak, and the upper and lower surfaces are provided with 0.2-0.5mm micro-bevels.

3. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The sound-absorbing buffer layer (2) is a microporous EPDM rubber sheet with a thickness of 0.8 to 1.5 mm; the sound-absorbing pad layer (3) is an IXPE foam roll with a thickness of 1.5 to 3.0 mm.

4. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The ecological substrate layer (4) is a bamboo fiber-MDI glue high-density fiberboard with a thickness of 8-12 mm.

5. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The moisture-proof and vapor barrier layer (5) is a 0.05-0.10 mm thick aluminum foil-PE co-extruded composite film, which is bonded to the ecological substrate layer (4) by hot melt adhesive.

6. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The insect-proof barrier layer (6) is composed of a 0.05-0.12 mm thick aluminum-plastic co-extruded film and a pyrethroid microcapsule-camphor plant essential oil composite coating, with a coating dry weight of 3-8 g / m².

7. The eco-friendly composite sound-absorbing wood panel according to claim 1, characterized in that: The back coating protective layer (7) is a UV-cured acrylic waterproof coating with a dry film thickness of 20–35 μm.

Images