Composite wood structural wall panel
By using a composite structure of cross-laminated plywood, polyurethane board, and phosphogypsum board, the shortcomings of traditional solid wood wall panels in terms of mechanical properties, moisture resistance, and fire resistance are solved, thereby improving the stability, thermal insulation, and safety of the wall panels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU ZEMU GREEN BUILDING ENG TECH RES CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional solid wood wall panels have significant shortcomings in terms of mechanical properties, moisture resistance, fire resistance, and thermal insulation, resulting in structural instability, poor living comfort, and high fire risk.
A composite structure of orthogonal plywood, polyurethane board, and phosphogypsum board is used, which is fixed by gluing and fasteners to form a composite wood structure wall panel. A transparent fireproof coating and a mesh fabric layer are added to improve strength and safety.
It improves the mechanical properties of the wall panels, prevents deformation and cracking, enhances thermal insulation and environmental performance, and improves the safety and aesthetics of the building.
Smart Images
Figure CN224379256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated wood structure technology, and in particular to a composite wood structure wall panel. Background Technology
[0002] Prefabricated timber-framed buildings are widely used due to their comprehensive advantages of low carbon emissions, environmental friendliness, structural safety, efficient construction, and comfortable living. Their core advantages lie in their ecological value and construction efficiency throughout the entire life cycle: from a material production perspective, the carbon emission intensity of a timber-framed system is only 1 / 8 that of reinforced concrete; from a construction perspective, prefabricated components have a high on-site assembly rate, shortening the construction period compared to traditional methods and reducing construction waste; from a living experience perspective, the natural moisture-regulating properties of wood can stabilize indoor humidity within a comfortable range for humans, and combined with the sound wave damping properties of wood, indoor noise can be significantly reduced. In such building systems, the supporting frames composed of beams and columns are typically filled with timber-framed wall panels. As a core component of the enclosure structure, the performance of these wall panels directly affects the overall quality of the building.
[0003] Although traditional solid wood wall panels are made from natural materials, they suffer from multiple performance shortcomings due to the inherent characteristics of wood:
[0004] In terms of mechanical properties, traditional solid wood wall panels exhibit significant anisotropy—the tensile strength is higher in the direction parallel to the grain (along the wood grain) and lower in the direction perpendicular to the grain (perpendicular to the grain), with the strength difference between the two being as high as 10 to 40 times. This characteristic makes the wall panels extremely prone to loosening of tenons and mortises or cracking of panels when subjected to lateral loads (such as wind force and seismic force). For example, in the typhoon-prone southeastern coastal areas, low-rise residential buildings using solid wood wall panels often experience deformation at the corner joints, seriously affecting the overall structural integrity.
[0005] The shortcomings in moisture resistance are even more pronounced. Wood is a porous material, and its moisture content will expand and contract with changes in ambient humidity. This repeated deformation causes gaps to form between the wall panels and the frame, allowing rainwater to seep in and cause internal mold growth.
[0006] The shortcomings in fire resistance should not be ignored. Traditional solid wood wall panels, without fireproofing treatment, have a fire resistance rating of only B3 (flammable material), and fire spreads relatively quickly.
[0007] Insufficient thermal insulation directly impacts living comfort. Solid wood wall panels have a thermal conductivity 3-5 times that of EPS insulation boards. Actual monitoring shows that the indoor temperature difference in such buildings can reach 4-6℃ in winter, and heating energy consumption is higher than in buildings with adequate insulation.
[0008] These inherent defects collectively pose a dual threat to safety and comfort: structurally, insufficient crossgrain strength and moisture-induced deformation may lead to wall panel detachment and frame instability; health-wise, mold growth and temperature fluctuations increase the incidence of respiratory diseases; and safety-wise, flammability significantly increases the risk of building fires. With the increasing demands for performance integration in modern prefabricated buildings, traditional solid wood wall panels are no longer sufficient to meet the technical standards for multi-story timber structures. Utility Model Content
[0009] The purpose of this utility model is to provide a composite wood structure wall panel to solve the problems existing in the above-mentioned related technologies, avoid the problems of easy deformation and cracking, improve safety, and provide better thermal insulation and environmental protection effects.
[0010] To achieve the above objectives, this utility model provides the following solution:
[0011] This utility model discloses a composite wood structure wall panel, comprising orthogonal plywood, polyurethane board and phosphogypsum board connected in sequence.
[0012] In some examples, the side of the orthotropic plywood facing away from the polyurethane board is coated with a transparent fire-retardant coating.
[0013] In some examples, a mesh fabric layer is adhered to the side of the phosphogypsum board facing away from the polyurethane board.
[0014] In some examples, the orthogonal plywood is made of three substrates glued together.
[0015] In some examples, the thickness of each substrate layer is 6 mm to 10 mm.
[0016] In some examples, the polyurethane panel has a fire rating of B1.
[0017] In some examples, the compressive strength of the polyurethane board is not less than 150 kPa.
[0018] In some examples, the density of the phosphogypsum board is 1000 kg / m³. 3 ~1300kg / m 3 .
[0019] In some examples, the orthotropic plywood board is fixed to the polyurethane board, and the polyurethane board is fixed to the phosphogypsum board by adhesive.
[0020] In some examples, the orthotropic plywood board, the polyurethane board, and the phosphogypsum board are secured as a single unit by fasteners that pass through all three components simultaneously.
[0021] This utility model achieves the following technical advantages compared to related technologies:
[0022] Ordinary solid wood wall panels have high strength along the grain direction but weak strength along the cross grain direction. The cross-laminated plywood used in this invention is made of multiple layers of substrate glued together, with the grain directions of adjacent substrate layers perpendicular to each other. Compared to ordinary solid wood wall panels, it has superior mechanical properties and avoids deformation and cracking.
[0023] Polyurethane boards, due to their high closed-cell ratio, possess excellent thermal insulation capabilities and provide good heat preservation. When used as part of composite wood structure wall panels, they can improve the building's thermal insulation performance compared to ordinary solid wood wall panels.
[0024] Gypsum board is widely used in building decoration, but it is usually made of natural gypsum. This utility model uses phosphogypsum board, which can use industrial waste solid phosphogypsum and slag to replace natural gypsum, reducing resource and energy consumption. Each ton of phosphogypsum board can reduce carbon dioxide emissions by 1.5 tons.
[0025] Therefore, this utility model uses orthogonal plywood to replace ordinary solid wood wall panels and adds polyurethane board and gypsum board to obtain composite wood structure wall panels. Compared with ordinary solid wood wall panels used in the prior art, the resulting composite wood structure wall panels are not only less prone to deformation and cracking, thus improving safety, but also have better heat insulation and environmental protection effects.
[0026] In a preferred embodiment of this invention, a transparent fire-retardant coating is applied to the side of the cross-laminated plywood facing away from the polyurethane board. The transparency of the fire-retardant coating allows the wood grain of the cross-laminated plywood to be clearly visible from the outside, enhancing the overall aesthetics of the building. Furthermore, the transparent fire-retardant coating not only prevents scratches on the cross-laminated plywood but also hinders its ignition by outdoor fire sources, improving safety.
[0027] In a preferred embodiment of this invention, a mesh fabric layer is adhered to the side of the phosphogypsum board facing away from the polyurethane board. When subjected to external impact, the mesh fabric layer can evenly distribute the force to the surrounding area, thereby preventing the phosphogypsum board from cracking.
[0028] In a preferred embodiment of this invention, the orthogonal plywood is made of three substrate layers glued together. By selecting a relatively small number of substrate layers, the overall thickness and weight are minimized, facilitating transportation and assembly. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of a composite wood structure wall panel in some examples of this utility model.
[0031] In the diagram: 100 - Composite wood structure wall panel; 1 - Cross-laminated plywood board; 2 - Polyurethane board; 3 - Phospholipid gypsum board; 4 - Transparent fireproof coating; 5 - Mesh fabric layer. Detailed Implementation
[0032] 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.
[0033] The purpose of this utility model is to provide a composite wood structure wall panel to solve the problems existing in the above-mentioned related technologies, avoid the problems of easy deformation and cracking, improve safety, and provide better thermal insulation and environmental protection effects.
[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0035] Reference Figure 1 This embodiment provides a composite wood structure wall panel 100, which includes cross-laminated timber (CLT) board 1, polyurethane board 2 and phosphogypsum board 3 connected in sequence.
[0036] The working principle of the composite wood structure wall panel 100 in this embodiment is as follows:
[0037] The tensile strength of ordinary solid wood wall panels along the grain (parallel to the wood grain) can reach 80-120 MPa, while that in the cross-grain direction (perpendicular to the wood grain) is only 3-8 MPa, a difference of 10-40 times. This characteristic makes ordinary solid wood wall panels extremely prone to cracking when subjected to lateral loads (such as wind or earthquake forces). For example, in the typhoon-prone southeastern coastal areas, low-rise residential buildings using ordinary solid wood wall panels often experience deformation at the corner joints, with maximum displacement reaching 5-8 mm, seriously affecting the overall structural integrity.
[0038] The orthotropic plywood 1 used in this embodiment is made of multiple layers of substrate glued together. The grain direction of two adjacent substrate layers is perpendicular to each other. Compared with ordinary solid wood wall panels, it has better mechanical properties and avoids deformation and cracking.
[0039] Polyurethane board 2, due to its high closed-cell ratio, has excellent thermal insulation capabilities and can provide good heat preservation. Incorporating it as part of the composite wood structure wall panel 100 can improve the building's thermal insulation performance compared to ordinary solid wood wall panels.
[0040] Gypsum board is widely used in building decoration, but it is usually made of natural gypsum. In this embodiment, phosphogypsum board 3 is used, which can use industrial waste solid phosphogypsum and slag to replace natural gypsum, thereby reducing resource and energy consumption. Each ton of phosphogypsum board 3 can reduce carbon dioxide emissions by 1.5 tons.
[0041] Guizhou ranks third in the country in terms of phosphate rock reserves, with proven reserves of 650 million tons. Among them, high-grade phosphate rock (P2O5≥32%) accounts for 78%. The resources are abundant, low-cost, and can be used on a large scale.
[0042] Therefore, in this embodiment, orthogonal plywood board 1 is used to replace ordinary solid wood wall panels, and polyurethane board 2 and gypsum board are added. The resulting composite wood structure wall panel 100, compared with the ordinary solid wood wall panels used in the prior art, is not only less prone to deformation and cracking, thus improving safety, but also has better heat insulation and environmental protection effects.
[0043] In some examples, the side of the orthogonal plywood 1 facing away from the polyurethane board 2 is coated with a transparent fire-retardant coating 4.
[0044] The transparency of the transparent fire-retardant coating 4 allows the wood grain of the cross-laminated plywood board 1 to be clearly visible from the outside, enhancing the overall aesthetics of the building. Furthermore, the transparent fire-retardant coating 4 not only prevents scratches on the cross-laminated plywood board 1 but also hinders its ignition by outdoor fire sources, thus improving safety.
[0045] In some examples, a mesh fabric layer 5 is adhered to the side of the phosphogypsum board 3 facing away from the polyurethane board 2.
[0046] When subjected to external impact, the mesh layer 5 can evenly distribute the force to the surrounding area, thereby preventing the phosphogypsum board 3 from cracking.
[0047] In some examples, the orthogonal plywood 1 is made of three substrates glued together.
[0048] By selecting a relatively small number of substrate layers, the overall thickness and weight can be reduced as much as possible, making transportation and assembly easier.
[0049] If it is necessary to improve the overall structural strength, orthogonal plywood 1 with more substrate layers can also be selected.
[0050] In some examples, the thickness of each substrate layer is 6 mm to 10 mm, preferably 8 mm.
[0051] Depending on the specific needs, those skilled in the art may also choose other thickness ranges.
[0052] In some examples, the fire rating is B1.
[0053] The polyurethane board 2 used in construction achieves a B1 (flame-retardant) fire resistance standard by adding flame retardants, which improves its flame retardancy compared to ordinary solid wood wall panels. In actual use, the side of the polyurethane board 2 facing the interior is made of phosphogypsum board 3, and the side of the polyurethane board 2 facing the exterior is made of cross-laminated plywood 1. As an intermediate structure, the polyurethane board 2 uses its own flame-retardant properties to prevent the spread of fire from the interior to the exterior, thus buying time for users to escape.
[0054] In some examples, the thickness of polyurethane board 2 is 30mm to 60mm.
[0055] Depending on the specific needs, those skilled in the art may also choose other thickness ranges, such as 20mm to 40mm.
[0056] In some examples, the compressive strength of polyurethane board 2 is not less than 150 kPa.
[0057] By selecting rigid polyurethane board 2, which has high compressive strength, the overall structure's resistance to deformation can be improved.
[0058] In some examples, the density of phosphogypsum board 3 is 1000 kg / m³. 3 ~1300kg / m 3 .
[0059] By selecting high-density high-pressure phosphogypsum board 3, the overall structural resistance to deformation can be improved compared to ordinary gypsum board.
[0060] In some examples, orthogonal plywood board 1 is fixed to polyurethane board 2, and polyurethane board 2 is fixed to phosphogypsum board 3 by adhesive.
[0061] The type of adhesive can be selected according to actual needs, as long as it can fix adjacent parts.
[0062] For example, the orthogonal plywood board 1 and the polyurethane board 2 can be glued together with isocyanate adhesive, and the polyurethane board 2 and the phosphogypsum board 3 can be glued together with epoxy resin adhesive.
[0063] In some examples, the orthogonal plywood board 1, polyurethane board 2, and phosphogypsum board 3 are fixed together as a whole by fasteners that pass through the orthogonal plywood board 1, polyurethane board 2, and phosphogypsum board 3.
[0064] The fasteners here can be bolts, self-tapping screws, or other components, which can be flexibly selected by those skilled in the art.
[0065] The edges of the 100mm composite wood structure wall panel can also be edge-wrapped to improve the overall aesthetics.
[0066] For example, metal edging can be used, and the metal material can be aluminum alloy, galvanized steel plate, etc.; anticorrosive wood edging can also be used, and the anticorrosive wood can be pine, fir, etc., which have been impregnated with preservatives; glass fiber reinforced polyurethane (GFRP) or PVC composite profiles can also be used for edging.
[0067] Since the orthotropic plywood board 1, polyurethane board 2 and phosphogypsum board 3 can all be prefabricated in the factory and assembled directly on the construction site, the construction period can be shortened and the construction efficiency improved.
[0068] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A composite wood structure wall panel (100), characterized in that, It includes orthogonal plywood (1), polyurethane board (2) and phosphogypsum board (3) connected in sequence.
2. The composite wood structure wall panel (100) according to claim 1, characterized in that: The orthotropic plywood board (1) is coated with a transparent fire-retardant coating (4) on the side opposite to the polyurethane board (2).
3. The composite wood structure wall panel (100) according to claim 1, characterized in that: A mesh fabric layer (5) is adhered to the side of the phosphogypsum board (3) away from the polyurethane board (2).
4. The composite wood structure wall panel (100) according to claim 1, characterized in that: The orthogonal plywood board (1) is made of three substrates glued together.
5. The composite wood structure wall panel (100) according to claim 4, characterized in that: The thickness of each substrate layer is 6mm to 10mm.
6. The composite wood structure wall panel (100) according to claim 1, characterized in that: The polyurethane board (2) has a fire rating of B1.
7. The composite wood structure wall panel (100) according to claim 1, characterized in that: The compressive strength of the polyurethane board (2) is not less than 150 kPa.
8. The composite wood structure wall panel (100) according to claim 1, characterized in that: The density of the phosphogypsum board (3) is 1000 kg / m 3 ~ 1300 kg / m 3 .
9. The composite wood structure wall panel (100) according to claim 1, characterized in that: The orthogonal plywood board (1) and the polyurethane board (2), and the polyurethane board (2) and the phosphogypsum board (3) are all fixed by adhesive.
10. The composite wood structure wall panel (100) according to claim 1, characterized in that: The orthotropic plywood board (1), the polyurethane board (2), and the phosphogypsum board (3) are fixed together as a whole by fasteners, which pass through the orthotropic plywood board (1), the polyurethane board (2), and the phosphogypsum board (3).