High-strength plywood with bidirectional anti-deformation structure

Abstract

The utility model relates to plywood technical field, concretely relates to a high -strength plywood with two -way deformation resistance structure, including hetero -directional reinforcing core layer, self -compensating expansion joint, wood veneer, high temperature resistant resin adhesive and surface reinforcing layer, the hetero -directional reinforcing core layer adopts the wood veneer mixed layer of two -way corrugated groove slant stripe directional paving, and the grid interlocking structure is formed through laser cutting process. The utility model through hetero -directional reinforcing core layer and multilayer wood veneer form firm combination through high temperature resistant resin adhesive, and the gradient enhancement design and the edge sealing structure of surface reinforcing layer provide comprehensive protection, and the flexible transition characteristic of transition buffer zone ensures the stress effective transmission and dispersion between each structure layer, not only significantly improved the two -way mechanical property balance and size stability of panel, also endows it with excellent temperature adaptability, edge sealing and overall structural integrity, makes it can adapt to the use requirement under various complex environment.

Description

Technical Field

[0001] This utility model relates to the field of plywood technology, and specifically to a high-strength plywood with a bidirectional anti-deformation structure. Background Technology

[0002] High-strength plywood is an engineered wood product made by bonding multiple layers of cross-laminated wood veneers with water-resistant resin adhesives (such as phenolic resin) under high temperature and pressure. Its unique laminated structure overcomes the anisotropy of natural wood, and its strength can reach 2-3 times that of ordinary plywood. It is widely used in fields that require lightweight and high strength, such as construction formwork, transportation equipment, and load-bearing structures.

[0003] Currently, the grain of each veneer in high-strength plywood is not cross-arranged, which will cause a serious imbalance in its mechanical properties. Due to the natural anisotropy of wood, the strength of the board is higher in the direction along the grain, but significantly weaker in the direction across the grain, making it prone to deformation or cracking. This structural defect will cause the board to suffer local damage when subjected to multi-directional loads, such as interlayer delamination or warping. At the same time, changes in humidity and temperature will also exacerbate unidirectional shrinkage and expansion, significantly reducing dimensional stability. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength plywood with a bidirectional anti-deformation structure to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-strength plywood with a bidirectional anti-deformation structure includes an anisotropically reinforced core layer, a self-compensating expansion joint, wood veneer, high-temperature resistant resin adhesive, and a surface reinforcement layer. The anisotropically reinforced core layer is a mixed layer of wood veneer with bidirectional corrugated grooves and diagonal orientation, which is formed into a grid-like interlocking structure by laser cutting.

[0007] Preferably, the self-compensating expansion joint has microcapsule phase change material pre-placed on the joint surface of adjacent veneers.

[0008] Preferably, the wood veneer is a multi-layer board structure, with the outermost veneer having the same grain direction as the length direction of the board, and forming an orthogonal composite structure with the anisotropic reinforcing core layer.

[0009] Preferably, the high-temperature resistant resin adhesive is either modified phenolic resin or melamine-formaldehyde resin, and a flexible transition zone is formed at the self-compensating expansion joint.

[0010] Preferably, the surface reinforcement layer is either wear-resistant paper or glass fiber cloth impregnated with phenolic resin, which is bonded to the outermost veneer through a hot-pressing process, and a carbon fiber woven mesh is added to the anisotropic reinforcement core layer region.

[0011] Preferably, a transition buffer zone is provided between the anisotropic reinforced core layer and the wood veneer, and the buffer zone is made of porous aramid honeycomb material.

[0012] Preferably, the edge of the surface reinforcement layer extends to form a wrap-around edge sealing structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the anisotropically reinforced core layer and the multi-layer wood veneer are firmly bonded together by high-temperature resistant resin adhesive; the gradient reinforcement design of the surface reinforcement layer and the edge sealing structure provide comprehensive protection; and the flexible transition characteristics of the transition buffer zone ensure the effective transfer and dispersion of stress between the structural layers. This not only significantly improves the bidirectional mechanical property balance and dimensional stability of the board, but also endows it with excellent temperature adaptability, edge sealing and overall structural integrity, enabling it to adapt to the usage requirements of various complex environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial sectional view of the overall structure of this utility model;

[0016] Figure 3 This is a partial structural diagram of the wood veneer in this utility model;

[0017] Figure 4 This is a schematic diagram of the anisotropically reinforced core layer in this utility model.

[0018] In the diagram: 1. Anisotropic reinforced core layer; 2. Self-compensating expansion joint; 3. Wood veneer; 4. High-temperature resistant resin adhesive; 5. Surface reinforcement layer. Detailed Implementation

[0019] 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. Example

[0020] Reference Figure 1-4 This embodiment provides a high-strength plywood with a bidirectional anti-deformation structure, including an anisotropic reinforcing core layer 1, a self-compensating expansion joint 2, a wood veneer 3, a high-temperature resistant resin adhesive 4, and a surface reinforcement layer 5. The anisotropic reinforcing core layer 1 is a mixed layer of wood veneer with bidirectional corrugated grooves and diagonal oriented laying, and a grid-like interlocking structure is formed by laser cutting process.

[0021] Among them, the bidirectional corrugated groove design and grid-like interlocking structure of the anisotropically reinforced core layer 1 create a mechanical interlocking effect between the three wood veneer layers, significantly improving the plywood's bidirectional resistance to deformation. The unique core layer structure not only balances the longitudinal and transverse mechanical properties, but also effectively suppresses warping deformation caused by temperature changes.

[0022] Specifically, the self-compensating expansion joint 2 has microcapsule phase change material pre-placed on the joint surface of adjacent single plates.

[0023] Among them, the self-compensating expansion joint 2 realizes the joint adjustment function by pre-placing microcapsule phase change material on the joint surface of adjacent wood veneer 3. When the ambient temperature changes, the structure can automatically compensate for the thermal expansion and contraction deformation of the wood veneer 3, and prevent stress concentration and cracking at the joint.

[0024] Furthermore, the wood veneer 3 is a multi-layer board structure, with the outermost veneer having the same grain direction as the board length direction, and forming an orthogonal composite structure with the anisotropic reinforcing core layer 1.

[0025] Among them, the orthogonal composite structure design of the multi-layer wood veneer 3, combined with the directional texture arrangement of the outermost veneer, enables the board to form a complete stress transmission network, allowing the surface reinforcement layer 5, wood veneer 3 and anisotropic reinforcement core layer 1 to work together, greatly improving the overall load-bearing performance.

[0026] Preferably, the high-temperature resistant resin adhesive 4 is either modified phenolic resin or melamine-formaldehyde resin, and a flexible transition zone is formed at the self-compensating expansion joint 2.

[0027] Among them, the flexible transition zone design formed by the high-temperature resistant resin adhesive 4 at the self-compensating expansion joint 2 cleverly solves the contradiction between rigid bonding and deformation compensation, ensuring a firm bond between the wood veneers 3 and adapting to dimensional changes caused by environmental changes.

[0028] Furthermore, the surface reinforcement layer 5 is either wear-resistant paper or glass fiber cloth impregnated with phenolic resin, which is bonded to the outermost veneer through a hot pressing process, and a carbon fiber woven mesh is added to the region of the anisotropic reinforcement core layer 1.

[0029] Among them, the composite structure design of the surface reinforcement layer 5 creates a gradient reinforcement effect by embedding carbon fiber woven mesh in the impregnated resin substrate, so that the surface of the plate has both excellent wear-resistant protection function and can effectively transfer the load to the anisotropic reinforcement core layer 1.

[0030] Furthermore, a transition buffer zone is provided between the anisotropic reinforced core layer 1 and the wood veneer 3. This buffer zone is made of porous aramid honeycomb material, and the edge of the surface reinforcement layer 5 extends to form a wrapping edge sealing structure.

[0031] The transition buffer zone adopts a porous aramid honeycomb structure design, forming a flexible transition layer between the anisotropic reinforced core layer 1 and the wood veneer 3. This effectively absorbs and disperses interlayer shear stress, avoiding interlayer delamination caused by stress concentration. The wrapping edge sealing structure extends the surface reinforcement layer 5 to wrap around the edge of the board, forming a continuous protective layer. This not only improves the edge sealing performance but also enhances the overall structural integrity and aesthetics of the board.

[0032] When in use, when an external load is applied to the surface reinforcement layer 5, the stress is first evenly distributed through the orthogonal texture structure of the outermost wood veneer 3, and then transferred to the grid-like interlocking structure of the anisotropic reinforcement core layer 1 through the high-temperature resistant resin adhesive 4 to achieve bidirectional stress dispersion.

[0033] Meanwhile, the microcapsule phase change material in the self-compensating expansion joint 2 can respond to changes in ambient temperature in real time and automatically adjust the joint gap to offset thermal deformation. The transition buffer zone absorbs the peak value of interlayer shear stress through its honeycomb structure. Finally, the encapsulated edge sealing structure ensures the effective transfer of stress in the edge area, forming a complete load transfer closed loop.

[0034] In summary, a complete multi-level synergistic system is constructed through the bidirectional corrugated groove diagonal design and grid interlocking structure of the anisotropically reinforced core layer 1, and the intelligent temperature compensation function of the self-compensating expansion joint 2. The anisotropically reinforced core layer 1 and the multi-layer wood veneer 3 are firmly bonded together by the high-temperature resistant resin adhesive 4. The gradient reinforcement design and edge sealing structure of the surface reinforcement layer 5 provide comprehensive protection, and the flexible transition characteristics of the transition buffer zone ensure the effective transfer and dispersion of stress between the structural layers. This not only significantly improves the bidirectional mechanical property balance and dimensional stability of the board, but also endows it with excellent temperature adaptability, edge sealing and overall structural integrity, enabling it to adapt to the usage requirements of various complex environments.

[0035] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-strength plywood with a bidirectional anti-deformation structure, characterized in that: It includes an anisotropic reinforced core layer (1), a self-compensating expansion joint (2), a wood veneer (3), a high-temperature resistant resin adhesive (4), and a surface reinforcement layer (5). The anisotropic reinforced core layer (1) is a mixed layer of wood veneer with bidirectional corrugated grooves and oriented paving, and a grid-like interlocking structure is formed by laser cutting.

2. The high-strength plywood with a bidirectional deformation-resistant structure according to claim 1, characterized in that: The self-compensating expansion joint (2) has microcapsule phase change material pre-placed on the joint surface of adjacent single plates.

3. A high-strength plywood with a bidirectional deformation-resistant structure according to claim 2, characterized in that: The wood veneer (3) is a multi-layer board structure. The outermost veneer has a grain direction that is consistent with the length direction of the board and forms an orthogonal composite structure with the anisotropic reinforcing core layer (1).

4. A high-strength plywood with a bidirectional deformation-resistant structure according to claim 3, characterized in that: The high-temperature resistant resin adhesive (4) is either modified phenolic resin or melamine-formaldehyde resin, and a flexible transition zone is formed at the self-compensating expansion joint (2).

5. A high-strength plywood with a bidirectional deformation-resistant structure according to claim 4, characterized in that: The surface reinforcement layer (5) is either wear-resistant paper or glass fiber cloth impregnated with phenolic resin, which is combined with the outermost veneer through a hot pressing process, and a carbon fiber woven mesh is added to the anisotropic reinforcement core layer (1) area.

6. A high-strength plywood with a bidirectional deformation-resistant structure according to claim 5, characterized in that: A transition buffer zone is provided between the anisotropic reinforced core layer (1) and the wood veneer (3), which is made of porous aramid honeycomb material.

7. A high-strength plywood with a bidirectional deformation-resistant structure according to claim 6, characterized in that: The surface reinforcement layer (5) extends along its edge to form a wrap-around edge sealing structure.

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