High-stability SPC aluminum-wood honeycomb composite board and preparation method thereof

Abstract

The invention discloses a high-stability SPC aluminum-wood honeycomb composite board and a preparation method thereof.The board sequentially comprises a first SPC stone crystal layer, a first eucalyptus veneer layer, an aluminum honeycomb core layer, a second eucalyptus veneer layer and a second SPC stone crystal layer from top to bottom, all the layers are compounded into a whole through double-component AB formaldehyde-free glue in a cold pressing mode, and the thickness and technological parameters of all the layers have the optimal range; the SPC stone crystal layer can be replaced by an aluminum veneer. The preparation method comprises six steps of eucalyptus veneer pretreatment, SPC stone crystal layer treatment and the like. The composite board is stable in structure, high in nail-holding power, waterproof, environment-friendly, excellent in fire prevention and sound insulation, easy to prepare, capable of achieving mass production and suitable for being used in multi-scene decoration and structures.

Description

Technical Field

[0001] This invention relates to the technical field of building decorative panels, furniture panels, and vehicle and ship interior panels. Specifically, it relates to a multi-layer composite environmentally friendly decorative panel with aluminum honeycomb as the core layer, eucalyptus veneer as the structural reinforcement layer, and SPC stone-plastic material as the surface protective layer, and its preparation method. It can be widely used in various scenarios such as home decoration, commercial decoration, furniture manufacturing, and vehicle and ship interiors, and is especially suitable for environments with high requirements for the stability, environmental protection, waterproof and fireproof properties of the panels. Background Technology

[0002] With the rapid development of industries such as building decoration, furniture manufacturing, and automotive and ship interiors, people have increasingly stringent requirements for the comprehensive performance of decorative panels. These panels not only need to meet basic decorative functions but also demand higher standards in terms of strength, structural stability, environmental friendliness, fire resistance, moisture resistance, and adaptability to various application scenarios. Currently, the most common decorative and structural panels on the market include four main categories: aluminum honeycomb panels, pure wood panels, single-layer SPC stone-plastic panels, and conventional composite panels. However, all types of panels have significant performance defects, making it difficult to meet the diversified needs of modern industry development.

[0003] Traditional aluminum honeycomb panels, with their lightweight and high strength advantages, are used in some commercial projects. However, their lack of a wood-like surface structure results in extremely poor nail-holding power, making it unsuitable for direct installation of hardware. Furthermore, the edges are prone to sagging and damage, limiting their use as core structural components such as cabinets and doors, thus restricting their application. Pure wood panels possess natural textures and align with popular aesthetic preferences for home decoration and furniture. However, the inherent characteristics of wood make it susceptible to moisture, warping, mold, and rot. It also has extremely poor fire resistance and is easily damaged in humid or high-temperature environments. Additionally, its environmental performance is significantly affected by raw materials and processing techniques, making stable control difficult and prone to problems such as excessive formaldehyde levels, which can harm human health.

[0004] SPC (Stone Plastic Composite) boards, as a new type of environmentally friendly building material, possess excellent waterproof, moisture-proof, and flame-retardant properties, and have a long service life. However, these boards have a cold feel, lacking the warmth of natural materials. They also suffer from insufficient toughness, limited structural strength, and mediocre sound and heat insulation, failing to meet the needs of high-end applications. Furthermore, they are insufficient for structural support when used alone. Conventional composite boards are often prepared using a simple two- or three-layer stacking process. This relatively simple interlayer bonding results in weak interlayer adhesion, making them prone to delamination and cracking under long-term use or environmental changes. Moreover, their production process is complex and costly, leading to a lower overall cost-effectiveness.

[0005] More importantly, there is currently no integrated composite board on the market that can efficiently and stably combine the lightweight and high strength of aluminum honeycomb core, the excellent nail-holding power of eucalyptus veneer, and the waterproof and environmentally friendly performance of SPC stone-plastic layer. Existing boards all have performance shortcomings and cannot simultaneously meet the comprehensive performance requirements of high strength, high stability, high nail-holding power, waterproofing, fire resistance, and formaldehyde-free environmental protection, making them unsuitable for various applications such as home wall panels, high-end furniture cabinets, and automotive and marine interiors. Therefore, developing a new type of composite board that is structurally stable, not easily deformed, has excellent nail-holding power, is waterproof and moisture-proof, environmentally friendly and formaldehyde-free, fire-retardant, and has a wide range of applications has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a high-stability SPC aluminum-wood honeycomb composite panel, while also providing its industrial preparation method. This effectively solves the technical problems of traditional panels, such as poor nail-holding power, easy deformation, easy delamination, insufficient waterproof and fireproof performance, and poor environmental performance. It achieves efficient integration of aluminum honeycomb core, eucalyptus veneer, and SPC stone-plastic layer, resulting in a composite panel with excellent comprehensive performance and wide applicability, meeting the development needs of industries such as building decoration, furniture manufacturing, and automotive and ship interiors.

[0007] To achieve the above objectives, the present invention employs the following technical means: A high-stability SPC aluminum-wood honeycomb composite panel includes, from top to bottom, a first SPC stone crystal layer, a first eucalyptus veneer layer, an aluminum honeycomb core layer, a second eucalyptus veneer layer, and a second SPC stone crystal layer. The first eucalyptus veneer layer and the second eucalyptus veneer layer are symmetrically composited on the upper and lower end faces of the aluminum honeycomb core layer, and the first SPC stone crystal layer and the second SPC stone crystal layer are respectively composited on the outer surfaces of the first eucalyptus veneer layer and the second eucalyptus veneer layer. The layers are bonded together using a cold-pressing process with formaldehyde-free environmentally friendly adhesive.

[0008] Preferably, the thickness of both the first SPC crystal layer and the second SPC crystal layer is 10-30 mm, and more preferably 14 mm.

[0009] Preferably, the composite surface of the first SPC crystal layer and the second SPC crystal layer is pre-treated with corona discharge to improve the bonding strength.

[0010] Preferably, the thickness of both the first and second eucalyptus veneer layers is 20-30 mm, more preferably 25 mm; the first and second eucalyptus veneer layers are treated with moisture resistance, and their upper and lower surfaces are covered with engineered wood veneer and sanded.

[0011] Preferably, the height of the aluminum honeycomb core layer is 80-120 mm, more preferably 100 mm; the honeycomb aperture is 3-5 mm, more preferably 4×4 mm; and the honeycomb foil thickness is 0.03-0.04 mm, more preferably 0.032 mm.

[0012] Preferably, the formaldehyde-free environmentally friendly adhesive is a two-component AB formaldehyde-free adhesive, applied using a glue applicator, with each layer fully bonded together.

[0013] Preferably, the cold pressing process parameters are: pressure 10-30 tons, room temperature compounding, and pressure holding time ≥480 minutes.

[0014] Preferably, the total thickness of the composite board is 170-300 mm, and more preferably 180 mm.

[0015] Preferably, the SPC stone crystal layer can be replaced with aluminum veneer to form an aluminum veneer-eucalyptus veneer-aluminum honeycomb composite panel.

[0016] A method for preparing a high-stability SPC aluminum-wood honeycomb composite panel includes the following steps: 1) Eucalyptus veneer pretreatment: Engineered wood veneer is glued to the top and bottom surfaces of the eucalyptus veneer and then sanded. 2) SPC crystalline layer surface treatment: The SPC crystalline layer was subjected to corona activation treatment; 3) Aluminum honeycomb core finishing: Stretch the aluminum honeycomb to standard dimensions; 4) Resin coating assembly: Two-component AB formaldehyde-free adhesive is used, and the adhesive is applied by a glue applicator. The layers are assembled in the following order: SPC layer - eucalyptus veneer layer - aluminum honeycomb core layer - eucalyptus veneer layer - SPC layer. 5) Cold pressing: At room temperature, maintain pressure of 10-30 tons for more than 8 hours; 6) Rest and recuperation: After depressurization, the edges are trimmed, finished, and cured to obtain the finished composite board.

[0017] The present invention has the following beneficial effects: 1. Stable structure and not easily deformed: The five-layer symmetrical structure design ensures uniform stress on the upper and lower surfaces of the board and achieves self-balance of internal stress, fundamentally solving the technical problems of warping, deformation and cracking of traditional boards and improving the service life of the board. 2. Extremely strong nail holding power: The symmetrical arrangement of eucalyptus veneer structural layers in the middle compensates for the poor nail holding power of aluminum honeycomb panels, allowing the composite panels to be directly nailed and hardware installed. It can be used as a core structural component such as cabinets and door panels, expanding the application range of the panels. 3. Excellent waterproof and moisture-proof performance: The outer SPC stone crystal layer forms a fully enclosed protective structure with extremely low water absorption rate, which can effectively block water penetration. It can be widely used in humid environments such as bathrooms, kitchens, vehicles and ships to prevent the boards from getting damp, deforming, moldy and rotting. 4. Environmentally friendly and formaldehyde-free: It is composited with two-component AB formaldehyde-free adhesive, with no formaldehyde release. The formaldehyde release level reaches ENF / E0 level, which meets high-end environmental protection requirements and will not cause harm to human health and the environment. It is suitable for homes, hospitals, schools and other scenarios with high environmental protection requirements. 5. Fireproof and flame retardant: Both the SPC stone crystal layer and the aluminum honeycomb core layer are non-combustible materials, and the eucalyptus veneer layer has been professionally treated to meet the B1 fire resistance standard. The overall fire resistance is excellent, which can effectively improve the safety of the usage scenario and reduce the risk of fire. 6. Excellent sound and heat insulation: The hollow structure of the aluminum honeycomb core layer can effectively block sound transmission and heat transfer, greatly improving the sound insulation, heat insulation and heat insulation capabilities of the board, and improving the comfort of the use environment; 7. Strong interlayer bonding: Through the synergistic effect of SPC stone crystal layer corona treatment, full glue application by glue spraying machine and room temperature cold pressing process, the bonding between each layer is ensured to be tight and the bonding force is strong, and there will be no delamination or cracking after long-term use. 8. Extremely wide range of applications: The thickness of each layer can be adjusted, the surface layer material can be replaced, or the position between layers can be interchanged according to the usage requirements. It is suitable for various scenarios such as home decoration wall panels, cabinet panels, door panels, ceilings, car and ship interiors, and commercial decoration, making it extremely practical. 9. Lightweight and high strength: The lightweight nature of the aluminum honeycomb core layer reduces the overall weight of the board, making it easier to transport and install. At the same time, its high strength, combined with the eucalyptus veneer layer and SPC stone crystal layer, ensures that the board has sufficient structural strength to withstand certain loads. 10. Simple preparation process and industrial mass production capability: The entire preparation process does not require complex equipment or high temperature and high pressure conditions. The process steps are simple, highly controllable, and can achieve large-scale production, reduce production costs, and enhance market competitiveness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; In the attached figures, the following labels are used: First SPC stone crystal layer 1, first eucalyptus veneer layer 2, aluminum honeycomb core layer 3, second eucalyptus veneer layer 4, second SPC stone crystal layer 5. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, a high-stability SPC aluminum-wood honeycomb composite panel includes, from top to bottom, a first SPC stone crystal layer 1, a first eucalyptus veneer layer 2, an aluminum honeycomb core layer 3, a second eucalyptus veneer layer 4, and a second SPC stone crystal layer 5. The first eucalyptus veneer layer 2 and the second eucalyptus veneer layer 4 are symmetrically composited on the upper and lower end faces of the aluminum honeycomb core layer 3. The first SPC stone crystal layer 1 and the second SPC stone crystal layer 5 are respectively composited on the outer surfaces of the first eucalyptus veneer layer 2 and the second eucalyptus veneer layer 4. The layers are bonded together into a single integrated structure using a formaldehyde-free environmentally friendly adhesive and a cold-pressing process, achieving synergistic performance of each layer.

[0021] Furthermore, the thickness of the first SPC stone crystal layer 1 and the second SPC stone crystal layer 5 is 10-30mm, preferably 14mm. This thickness range can ensure the surface protection performance of the board, take into account the overall lightweight requirements of the board, and avoid the problem of easy surface damage due to excessive thickness.

[0022] Furthermore, the SPC stone crystal layer composite surface is pre-treated with corona to enhance the surface activity of the SPC stone crystal layer through corona activation, effectively improving the bonding strength between it and the eucalyptus veneer layer, and further enhancing the stability of the interlayer bond.

[0023] Furthermore, the thickness of the first eucalyptus veneer layer 2 and the second eucalyptus veneer layer 4 is 20-30mm, preferably 25mm; the eucalyptus veneer undergoes professional moisture-proof treatment, and the upper and lower surfaces are covered with engineered wood veneer and sanded. On the one hand, this improves the nail-holding power of the board, allowing it to be used directly as a structural component; on the other hand, it improves the surface texture of the board and enhances the moisture-proof performance of the eucalyptus veneer, preventing it from warping due to moisture.

[0024] Furthermore, the height of the aluminum honeycomb core layer 3 is 80-120mm, preferably 100mm; the honeycomb aperture is 3-5mm, preferably 4×4mm; and the honeycomb foil thickness is 0.03-0.04mm, preferably 0.032mm. This parameter design can maximize the structural strength and sound and heat insulation performance of the board while ensuring the lightweight characteristics of the aluminum honeycomb core layer. Among them, controlling the honeycomb aperture within the range of 3-5mm can effectively reduce the abnormal noise problem caused by the shaking and displacement of the aluminum honeycomb core and improve the user experience of the board.

[0025] Furthermore, the formaldehyde-free environmentally friendly adhesive is a two-component AB formaldehyde-free adhesive, applied using a glue applicator, with full glue bonding between layers. The glue application is uniform and the thickness of the glue layer is controllable, which can ensure the interlayer bonding strength and the environmental performance of the board, avoiding the harm to human health caused by formaldehyde release.

[0026] Furthermore, the composite process is room temperature cold pressing, with a pressure of 10 to 30 tons and a holding time of ≥480 minutes. The room temperature cold pressing process does not require high-temperature heating, thus avoiding the damage of high temperature to the properties of each layer of materials. At the same time, through reasonable pressure and holding time design, it ensures that the layers are tightly bonded and that delamination and cracking are not likely to occur.

[0027] Furthermore, the total thickness of the board is 170-300mm, preferably 180mm. The thickness parameters of each layer can be adjusted according to the needs of different usage scenarios to adapt to the structural and performance requirements of different scenarios.

[0028] Furthermore, the SPC stone crystal layer can be replaced with aluminum veneer to form an aluminum veneer-eucalyptus veneer-aluminum honeycomb composite board, which is suitable for scenarios with higher surface hardness requirements; the SPC stone crystal layer and eucalyptus veneer layer can be interchanged according to usage requirements, flexibly adapting to different surface and structural requirements, and expanding the application range of the board.

[0029] A method for preparing a high-stability SPC aluminum-wood honeycomb composite panel includes the following steps: 1. Eucalyptus veneer pretreatment: Select high-quality eucalyptus veneer, glue engineered wood veneer to its upper and lower surfaces, and sand it after gluing to ensure that the surface of the eucalyptus veneer is flat and smooth, improve its adhesion to adjacent layers, and enhance the surface texture of the board. 2. SPC board surface treatment: The SPC stone crystal board is subjected to corona activation treatment. The corona effect destroys the molecular structure of the SPC board surface, enhances the surface activity, and lays the foundation for subsequent tight bonding with eucalyptus veneer layer. 3. Aluminum honeycomb core finishing: Stretch the aluminum honeycomb core to the standard specifications, with a fixed width of 1240mm and a length adjusted to 2460mm-3800mm according to actual production needs. After stretching, finish the aluminum honeycomb core to ensure that the honeycomb structure is uniform, undamaged, and free from deformation. 4. Adhesive application and assembly: Two-component AB formaldehyde-free adhesive is used. The adhesive is applied evenly using an adhesive application machine, and the amount of adhesive is controlled within a reasonable range to ensure full adhesive bonding between layers. Then, the layers are assembled in the following order: first SPC stone crystal layer 1 - first eucalyptus veneer layer 2 - aluminum honeycomb core layer 3 - second eucalyptus veneer layer 4 - second SPC stone crystal layer 5. During the assembly process, it is ensured that each layer is aligned and there is no misalignment. 5. Cold pressing: The assembled sheet is placed in a cold press and subjected to a pressure of 10 to 30 tons at room temperature for a holding time of ≥480 minutes to ensure a tight bond between the layers and form an integrated structure; 6. Finishing and Curing: After cold pressing, the pressure is released, and the edges of the board are trimmed and finished to remove excess parts and ensure accurate board dimensions. Then, the finished board is placed in a curing room for curing treatment. After curing, the finished board is obtained.

[0030] This invention achieves self-balancing of internal stress in the board through a five-layer symmetrical structure design, solving the problem of warping and deformation of traditional boards from the root of the structure. At the same time, it combines the waterproof, moisture-proof, environmentally friendly and flame-retardant properties of the SPC stone crystal layer, the excellent nail-holding power and natural texture of the eucalyptus veneer layer, and the lightweight, high-strength, sound insulation and heat insulation properties of the aluminum honeycomb core layer, achieving comprehensive performance that cannot be achieved by existing single boards. Moreover, the preparation process is simple, can be industrialized and mass-produced, and the production cost is reasonable. Example

[0031] A high-stability SPC aluminum-wood honeycomb composite panel, the structure of which is as follows from top to bottom: 1. First SPC crystalline layer 1: 12mm thick, with a corona-treated composite surface; 2. First eucalyptus veneer layer 2: 25mm thick, the eucalyptus veneer is moisture-proofed, and the upper and lower surfaces are covered with engineered wood veneer and sanded. 3. Aluminum honeycomb core layer 3: height 100mm, honeycomb aperture 4×4mm, honeycomb foil thickness 0.032mm; 4. Second eucalyptus veneer layer 4: 25mm thick, with the same specifications as the first eucalyptus veneer layer; 5. Second SPC crystal layer 5: 12mm thick, with the same specifications as the first SPC crystal layer.

[0032] In this embodiment, the total thickness of the plate is 180mm.

[0033] Preparation method: 1. Eucalyptus veneer pretreatment: Select high-quality eucalyptus veneer, glue engineered wood veneer to its upper and lower surfaces, and sand it with a sander after gluing to ensure that the surface flatness error is ≤0.1mm; 2. SPC board surface treatment: The SPC stone crystal board is subjected to corona treatment, with the corona power controlled at 300W and the treatment time at 30s, to improve surface activity; 3. Aluminum honeycomb core finishing: Stretch the aluminum honeycomb core to the standard size of 1240mm×2460mm, and after finishing, ensure that the honeycomb structure is uniform, without damage or deformation; 4. Adhesive application and assembly: Two-component AB formaldehyde-free adhesive is used, and the adhesive is applied evenly using an adhesive application machine at a rate of 150g / m². 2 The blanks are assembled in the following order: first SPC stone crystal layer - first eucalyptus veneer layer - aluminum honeycomb core layer - second eucalyptus veneer layer - second SPC stone crystal layer, ensuring that each layer is aligned. 5. Cold pressing: Place the assembled sheet into a cold press, apply 20 tons of pressure at room temperature, and hold the pressure for 8 hours (480 minutes). 6. Finishing and curing: After depressurization, the edges are trimmed with an edge trimming machine to the standard size, and then placed in a curing room for 72 hours to obtain the finished board.

[0034] According to the test results, the product of this embodiment has a fire rating of B1, an environmental protection rating of ENF, a nail holding force of ≥1500N, a water absorption rate of ≤0.02%, no deformation or delamination, and a sound insulation of ≥45dB. It can be widely used in high-end furniture, home decoration wall panels, vehicle and ship interiors and other scenarios. Example

[0035] A high-stability SPC aluminum-wood honeycomb composite panel, the structure of which is as follows from top to bottom: 1. First SPC crystalline layer 1: 30mm thick, with the composite surface treated with corona discharge; 2. First eucalyptus veneer layer 2: 20mm thick, the eucalyptus veneer is moisture-proofed, and the upper and lower surfaces are covered with engineered wood veneer and sanded. 3. Aluminum honeycomb core layer 3: height 80mm, honeycomb cell diameter 3×3mm, honeycomb foil thickness 0.03mm; 4. Second eucalyptus veneer layer 4: 20mm thick, with the same specifications as the first eucalyptus veneer layer; 5. Second SPC crystal layer 5: 30mm thick, with specifications consistent with the first SPC crystal layer.

[0036] In this embodiment, the total thickness of the plate is 200mm.

[0037] Preparation method: 1. Eucalyptus veneer pretreatment: Select high-quality eucalyptus veneer, glue engineered wood veneer to its upper and lower surfaces, and sand it with a sander after gluing to ensure that the surface flatness error is ≤0.1mm; 2. SPC board surface treatment: The SPC stone crystal board is subjected to corona treatment, with the corona power controlled at 280W and the treatment time at 25s, to improve surface activity; 3. Aluminum honeycomb core finishing: Stretch the aluminum honeycomb core to a size of 1240mm×3000mm, and after finishing, ensure that the honeycomb structure is uniform, without damage or deformation; 4. Adhesive application and assembly: Two-component AB formaldehyde-free adhesive is used, and the adhesive is applied evenly using an adhesive application machine at a rate of 140g / m². 2 The blanks are assembled in the following order: first SPC stone crystal layer - first eucalyptus veneer layer - aluminum honeycomb core layer - second eucalyptus veneer layer - second SPC stone crystal layer, ensuring that each layer is aligned. 5. Cold pressing: Place the assembled sheet into a cold press, apply 10 tons of pressure at room temperature, and hold the pressure for 10 hours (600 minutes). 6. Finishing and curing: After depressurization, the edges are trimmed with an edge trimming machine to the standard size, and then placed in a curing room for 72 hours to obtain the finished board.

[0038] According to the test results, the product of this embodiment has a fire rating of B1, an environmental protection rating of E0, a nail holding force of ≥1200N, a water absorption rate of ≤0.03%, no deformation or delamination, a sound insulation of ≥42dB, and is lightweight, making it easy to transport and install. It is suitable for ceilings, lightweight cabinets, and other similar applications. Example

[0039] A high-stability SPC aluminum-wood honeycomb composite panel, the structure of which is as follows from top to bottom: 1. First SPC crystalline layer 1: 15mm thick, with the composite surface treated with corona discharge; 2. First eucalyptus veneer layer 2: 30mm thick, the eucalyptus veneer is moisture-proofed, and the upper and lower surfaces are covered with engineered wood veneer and sanded. 3. Aluminum honeycomb core layer 3: height 120mm, honeycomb aperture 2×2mm, honeycomb foil thickness 0.04mm; 4. Second eucalyptus veneer layer 4: 30mm thick, with the same specifications as the first eucalyptus veneer layer; 5. Second SPC crystal layer 5: 15mm thick, with specifications consistent with the first SPC crystal layer.

[0040] In this embodiment, the total thickness of the board is 220mm, and the SPC stone crystal layer is replaced with aluminum single-layer board to form an aluminum single-layer board-eucalyptus single-layer board-aluminum honeycomb composite board.

[0041] Preparation method: 1. Eucalyptus veneer pretreatment: Select high-quality eucalyptus veneer, glue engineered wood veneer to its upper and lower surfaces, and sand it with a sander after gluing to ensure that the surface flatness error is ≤0.1mm; 2. Aluminum panel surface treatment: The aluminum panel is subjected to corona treatment with a power of 320W and a treatment time of 35s to improve surface activity and ensure the bonding strength with the eucalyptus veneer layer. 3. Aluminum honeycomb core finishing: Stretch the aluminum honeycomb core to a size of 1240mm×3800mm, and after finishing, ensure that the honeycomb structure is uniform, without damage or deformation; 4. Adhesive application and assembly: Two-component AB formaldehyde-free adhesive is used, and the adhesive is applied evenly using an adhesive application machine at a rate of 160g / m². 2 Assemble the blanks in the following order: first aluminum veneer layer - first eucalyptus veneer layer - aluminum honeycomb core layer - second eucalyptus veneer layer - second aluminum veneer layer, ensuring that each layer is aligned. 5. Cold pressing: Place the assembled sheet into a cold press, apply 30 tons of pressure at room temperature, and hold for 9 hours (540 minutes). 6. Finishing and curing: After depressurization, the edges are trimmed with an edge trimming machine to the standard size, and then placed in a curing room for 72 hours to obtain the finished board.

[0042] According to the test results, the product of this embodiment has a fire rating of Class A, an environmental protection rating of ENF, a nail holding force of ≥1800N, a water absorption rate of ≤0.01%, no deformation or delamination, a sound insulation of ≥48dB, extremely high structural strength, and excellent surface hardness. It is suitable for application scenarios with high requirements for strength and surface hardness, such as industrial decoration, heavy cabinets, and vehicle and ship interiors.

[0043] The examples provided in this invention are not intended to limit the implementation. Those skilled in the art will recognize that various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations, and any obvious variations or modifications derived therefrom are still within the scope of this invention.

Claims

1. A high-stability SPC aluminum-wood honeycomb composite panel, characterized in that, It includes, from top to bottom, the first SPC stone crystal layer (1), the first eucalyptus veneer layer (2), the aluminum honeycomb core layer (3), the second eucalyptus veneer layer (4), and the second SPC stone crystal layer (5). The first eucalyptus veneer layer (2) and the second eucalyptus veneer layer (4) are symmetrically composited on the upper and lower end faces of the aluminum honeycomb core layer (3), and the first SPC stone crystal layer (1) and the second SPC stone crystal layer (5) are respectively composited on the outer surfaces of the first eucalyptus veneer layer (2) and the second eucalyptus veneer layer (4). The layers are bonded together using a cold-pressing process with formaldehyde-free environmentally friendly adhesive.

2. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The thickness of the first SPC crystal layer (1) and the second SPC crystal layer (5) is 10-30 mm, preferably 14 mm.

3. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 2, characterized in that, The composite surface of the first SPC crystal layer (1) and the second SPC crystal layer (5) is pre-treated with corona to improve the bonding strength.

4. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The thickness of the first eucalyptus veneer layer (2) and the second eucalyptus veneer layer (4) is 20-30 mm, preferably 25 mm; the first eucalyptus veneer layer (2) and the second eucalyptus veneer layer (4) are treated with moisture resistance, and the upper and lower surfaces are covered with engineered wood veneer and sanded.

5. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The height of the aluminum honeycomb core layer (3) is 80-120mm, preferably 100mm; the honeycomb aperture is 3-5mm, preferably 4×4mm; and the honeycomb foil thickness is 0.03-0.04mm, preferably 0.032mm.

6. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The formaldehyde-free environmentally friendly adhesive is a two-component AB formaldehyde-free adhesive, which is applied using a glue applicator, and each layer is fully bonded together with the adhesive.

7. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The cold pressing process parameters are: pressure 10-30 tons, room temperature compounding, and pressure holding time ≥480 minutes.

8. The high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The total thickness of the composite board is 170-300mm, preferably 180mm.

9. A high-stability SPC aluminum-wood honeycomb composite panel according to claim 1, characterized in that, The SPC stone crystal layer can be replaced with aluminum veneer to form an aluminum veneer-eucalyptus veneer-aluminum honeycomb composite panel.

10. A method for preparing a high-stability SPC aluminum-wood honeycomb composite panel as described in any one of claims 1 to 9, characterized in that, Includes the following steps: 1) Eucalyptus veneer pretreatment: Engineered wood veneer is glued to the top and bottom surfaces of the eucalyptus veneer and then sanded. 2) SPC crystalline layer surface treatment: The SPC crystalline layer was subjected to corona activation treatment; 3) Aluminum honeycomb core finishing: Stretch the aluminum honeycomb to standard dimensions; 4) Resin coating assembly: Two-component AB formaldehyde-free adhesive is used, and the adhesive is applied by a glue applicator. The layers are assembled in the following order: SPC layer - eucalyptus veneer layer - aluminum honeycomb core layer - eucalyptus veneer layer - SPC layer. 5) Cold pressing: At room temperature, maintain pressure of 10-30 tons for more than 8 hours; 6) Rest and recuperation: After depressurization, the edges are trimmed, finished, and cured to obtain the finished composite board.

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