Ecological board production process for solving deformation of board

Abstract

The present application relates to the field of ecological board manufacturing, and specifically discloses an ecological board production process for solving the deformation of the board, and the process is as follows: nano-modified layers are coated on both sides of the core board to modify wood fibers, and then radio frequency drying is adopted; the positions of the soft veneer board and the decorative paper on the core board are adjusted, the positioning datum is fixed, and then hot pressing and gluing are performed; after hot pressing and gluing, the ecological board is obtained by being placed in a cooling and solidifying device and gradually cooled according to a set cooling curve; and the present application adopts bio-based polyester in the selection of adhesives, such materials have excellent bonding performance and waterproofness, and can enhance the stability of the board; the surface of the board is modified by nano technology, and a core board with stable performance and excellent deformation resistance can be obtained, nano materials can form extremely fine coatings, improve the stability of the board, and reduce the dimensional instability caused by environmental changes, and improve the service life and appearance quality of the core board.

Description

Technical Field

[0001] This invention relates to the field of eco-board manufacturing, and in particular to an eco-board production process for solving the problem of board deformation. Background Technology

[0002] With the continuous improvement of technology and living standards, eco-friendly boards are becoming increasingly popular as interior decoration materials. Eco-friendly boards are characterized by high temperature resistance, acid and alkali resistance, moisture resistance, and fire resistance. Their surface is resistant to discoloration and peeling, and they are easily processed into veneers with diverse styles and strong textures. Since its inception, this type of board has been rapidly applied to furniture, flooring, and interior decoration. Furthermore, as a new type of product, it combines the functions of veneer panels and plywood, saving production steps and increasing the added value of the product. This saves consumers on decoration costs and labor expenses, leading a new trend in home decoration.

[0003] However, in the existing production technology of eco-friendly boards, due to incorrect adhesive selection, untreated core boards being directly processed, and unstable cooling temperature control after hot pressing, the finished boards often deform and bend. This not only affects the performance of the eco-friendly boards but also greatly diminishes their appearance. Therefore, it is urgent to improve the existing production process to solve this problem. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an eco-friendly board production process that resolves board deformation. This process more precisely addresses the issues in existing eco-friendly board production technologies, such as incorrect adhesive selection, untreated core boards being directly processed, and unstable cooling temperature control after hot pressing, which frequently lead to deformation and bending of the finished boards.

[0005] This invention is achieved through the following technical solution:

[0006] An eco-friendly board production process for solving board deformation, the eco-friendly board includes a core board, two soft-surface boards and two decorative papers, the two decorative papers are respectively located on the upper and lower surfaces, the soft-surface boards and the core board are arranged alternately between the two decorative papers, the decorative papers are respectively bonded to the corresponding soft-surface boards through a first bio-based polyester layer, the soft-surface boards are all bonded to the core board through a second bio-based polyester layer, and both sides of the core board are coated with a nano-modified layer;

[0007] The first bio-based polyester layer is a composite layer composed of 40-60 parts polylactic acid, 20-40 parts polyhydroxy acid, 0.2-0.3 parts coupling agent, and 3-4 parts water-repellent agent; the second bio-based polyester layer is a composite layer composed of 50-80 parts polycaprolactone, 15-30 parts polyhydroxy fatty acid ester, 0.2-0.3 parts coupling agent, and 1-3 parts water-repellent agent.

[0008] The eco-friendly board production process that solves the problem of board deformation is achieved through the following process:

[0009] A nano-modified layer is coated on both sides of the core board to modify the wood fibers, and then radio frequency drying is used.

[0010] A first bio-based polyester layer is coated on one side of the soft leather panel, and after being dried to semi-dry, the corresponding decorative paper is attached to that side.

[0011] After the core board is dried, a second bio-based polyester layer is coated on both sides. After being baked to semi-dry, the other side of the corresponding soft leather board is attached to that side.

[0012] Adjust the positions of the soft leather board and the decorative paper on the core board, fix the positioning reference, and then perform hot pressing and gluing;

[0013] After hot pressing and bonding, the product is placed in a cooling and curing equipment and gradually cooled according to the set cooling curve to obtain an eco-board.

[0014] Furthermore, the first bio-based polyester layer is a composite layer composed of 60 parts polylactic acid, 40 parts polyhydroxy acid, 0.3 parts coupling agent, and 4 parts water-repellent agent.

[0015] Furthermore, the second bio-based polyester layer is a composite layer composed of 50 parts polycaprolactone, 30 parts polyhydroxyalkanoate, 0.2 parts coupling agent, and 2 parts water-repellent agent.

[0016] Furthermore, the coupling agent in both the first and second bio-based polyester layers is silane coupling agent KH-560; the hydrophobic agent in both the first and second bio-based polyester layers is sodium methylsilanolate or potassium methylsilicate.

[0017] Furthermore, the nano-modified layer is a suspension prepared from any one of nano zinc oxide, nano silica, or nano aluminum oxide.

[0018] Furthermore, after coating the first bio-based polyester layer and the second bio-based polyester layer, the temperature for drying to semi-drying is controlled at 130-160°C.

[0019] Furthermore, the hot pressing is performed using a surface hot press, with a hot pressing temperature of 110–200°C, a hot pressing time of 2–4 min, and a hot pressing pressure of 12–15 MPa.

[0020] Furthermore, the progressive cooling includes the following three stages:

[0021] Cooling stage one: Cooling from the highest temperature of 200℃ to 150℃ takes 30 minutes, and the cooling rate is (200-150) / 30 = 1.67℃ / minute;

[0022] Cooling stage two: Cooling from 150℃ to 100℃ takes 45 minutes, and the cooling rate decreases to (150-100) / 45 = 1.11℃ / minute;

[0023] Cooling stage three: Cooling from 100℃ to room temperature (room temperature set at 25℃) takes 120 minutes, and the cooling rate is further reduced to (100-25) / 120 = 0.625℃ / minute.

[0024] The beneficial effects of this invention are:

[0025] 1. In this invention, bio-based polyester is used for the adhesives between the veneer paper and the flexible veneer board, and between the flexible veneer board and the core board. This type of material has excellent bonding performance and water resistance, which can enhance the stability of the board.

[0026] 2. This invention uses a suspension made of nanomaterials to coat the surface of the core board. By using this nanotechnology to modify the surface of the board, a core board with stable performance and excellent deformation resistance can be obtained. The nanomaterials can form an extremely fine coating, which improves the stability of the board and reduces dimensional instability caused by environmental changes, thereby improving the lifespan and appearance of the core board.

[0027] 3. This invention uses a gradual cooling method to cool the ecological board after hot pressing. The gradual cooling method takes into account the physical reaction inside the board and ensures that the board can be cooled evenly inside and outside. This avoids the increase in internal stress and uneven distribution caused by rapid cooling, and prevents the board from deforming. Attached Figure Description

[0028] Figure 1 This invention provides a schematic diagram of an eco-friendly board structure that addresses the deformation of sheet materials.

[0029] Figure 2 This invention presents a schematic diagram of the production process for eco-friendly boards that addresses the issue of board deformation.

[0030] In the diagram: Core board 1; Soft leather board 2; Decorative paper 3. Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] Reference Figure 1 This invention proposes a structural schematic diagram of an eco-board to solve the problem of board deformation; the eco-board includes a core board 1, two soft skin boards 2 and two decorative papers 3, the two decorative papers are located on the upper and lower surfaces respectively, and the soft skin boards and the core board are arranged alternately between the two decorative papers. The decorative papers are respectively bonded to the corresponding soft skin boards through a first bio-based polyester layer, and the soft skin boards are all bonded to the core board through a second bio-based polyester layer. Both sides of the core board are coated with a nano-modified layer.

[0033] In one embodiment, the first bio-based polyester layer is a composite layer composed of 40-60 parts polylactic acid, 20-40 parts polyhydroxy acid, 0.2-0.3 parts coupling agent, and 3-4 parts water-repellent agent; the second bio-based polyester layer is a composite layer composed of 50-80 parts polycaprolactone, 15-30 parts polyhydroxy fatty acid ester, 0.2-0.3 parts coupling agent, and 1-3 parts water-repellent agent.

[0034] Specifically, the first bio-based polyester layer is a composite layer composed of 60 parts polylactic acid, 40 parts polyhydroxy acid, 0.3 parts coupling agent, and 4 parts water-repellent agent; the second bio-based polyester layer is a composite layer composed of 50 parts polycaprolactone, 30 parts polyhydroxy fatty acid ester, 0.2 parts coupling agent, and 2 parts water-repellent agent. Polylactic acid, polyhydroxy acid, polycaprolactone, and polyhydroxy fatty acid ester are all bio-based polyesters. These materials have excellent bonding and waterproof properties, which can enhance the stability of the board and have high environmental friendliness. Using the first and second bio-based polyester layers prepared by the above formula as adhesives, the formaldehyde release of the ecological board can reach below 0.1 mg / L, far exceeding the national standard E0 grade of 0.5 mg / L.

[0035] The coupling agent used in both the first and second bio-based polyester layers is silane coupling agent KH-560. Using silane coupling agent KH-560 as a coupling agent can improve the affinity between the bio-based polyester material and the board, thereby improving the bonding strength between the facing paper and the soft leather board, and between the soft leather board and the core board.

[0036] Sodium methylsiloxane or potassium methylsilicate are both used as water-repellent agents in the first and second bio-based polyester layers. Water-repellent agents can greatly improve the waterproof, moisture-proof and water-immersion resistance of the ecological board, prevent the ecological board from rotting and getting moldy, and ensure the weather resistance and service life of the ecological board.

[0037] In one embodiment, refer to Figure 2 This invention provides a schematic diagram of an eco-friendly board production process to address board deformation. The eco-friendly board production process to address board deformation is achieved through the following steps:

[0038] S1; A nano-modified layer is coated on both sides of the core board to modify the wood fibers. The nano-modified layer is a suspension prepared from any one of nano zinc oxide, nano silica, or nano alumina. Then, radio frequency drying is used. Radio frequency drying is a high-frequency heating technology that can quickly and uniformly dry materials. In this case, it can be used to dry and cure the nano-modified layer. This step uses a suspension made of nanomaterials to coat the surface of the core board. By performing surface modification treatment on the board through this nanotechnology, a core board with stable performance and excellent deformation resistance can be obtained. The nanomaterials can form an extremely fine coating, which improves the stability of the board and reduces dimensional instability caused by environmental changes, thereby improving the lifespan and appearance of the core board.

[0039] S2; Coat one side of the soft leather board with the first bio-based polyester layer, bake it until semi-dry, and then attach the corresponding decorative paper to the side. The temperature for baking until semi-dry is controlled at 130-160℃.

[0040] S3; After drying, the core board is coated with a second bio-based polyester layer on both sides. After drying to semi-dry, the other side of the corresponding soft leather board is attached to this side. The temperature for drying to semi-dry is also controlled at 130-160℃.

[0041] Bio-based polyester is used for the adhesives between the veneer paper and the flexible veneer board, and between the flexible veneer board and the core board. This type of material has excellent bonding performance and water resistance, which can enhance the stability of the board.

[0042] S4; Adjust the position of the soft leather board and the decorative paper on the core board, fix the positioning reference, and then perform hot pressing and bonding. The hot pressing and bonding is carried out using a veneer hot press machine, the hot pressing temperature is 200℃, the hot pressing time is 3min, and the hot pressing pressure is 12Mpa.

[0043] S5; After hot pressing and bonding, place it in a cooling and curing device, and gradually cool it according to the set cooling curve. Gradual cooling includes the following three stages:

[0044] Cooling stage one: Cooling from the highest temperature of 200℃ to 150℃ takes 30 minutes, and the cooling rate is (200-150) / 30 = 1.67℃ / minute;

[0045] Cooling stage two: Cooling from 150℃ to 100℃ takes 45 minutes, and the cooling rate decreases to (150-100) / 45 = 1.11℃ / minute;

[0046] Cooling stage three: Cooling from 100℃ to room temperature (room temperature set at 25℃) takes 120 minutes, and the cooling rate is further reduced to (100-25) / 120 = 0.625℃ / minute;

[0047] Ecological boards are obtained after gradual cooling. The gradual cooling method takes into account the physical reaction inside the board, ensuring that the board can be cooled evenly inside and outside, avoiding the increase of internal stress and uneven distribution caused by rapid cooling, and preventing the board from deforming.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A production process for eco-friendly boards that solves the problem of board deformation, characterized in that, The ecological board includes a core board, two soft-surface panels, and two decorative papers. The two decorative papers are located on the upper and lower surfaces, respectively. The soft-surface panels and the core board are arranged alternately between the two decorative papers. The decorative papers are respectively bonded to the corresponding soft-surface panels through a first bio-based polyester layer. The soft-surface panels are all bonded to the core board through a second bio-based polyester layer. Both sides of the core board are coated with a nano-modified layer. The first bio-based polyester layer is a composite layer composed of 40-60 parts polylactic acid, 20-40 parts polyhydroxy acid, 0.2-0.3 parts coupling agent, and 3-4 parts water-repellent agent; the second bio-based polyester layer is a composite layer composed of 50-80 parts polycaprolactone, 15-30 parts polyhydroxy fatty acid ester, 0.2-0.3 parts coupling agent, and 1-3 parts water-repellent agent. The eco-friendly board production process that solves the problem of board deformation is achieved through the following process: A nano-modified layer is coated on both sides of the core board to modify the wood fibers, and then radio frequency drying is used. A first bio-based polyester layer is coated on one side of the soft leather panel, and after being dried to semi-dry, the corresponding decorative paper is attached to that side. After the core board is dried, a second bio-based polyester layer is coated on both sides. After being baked to semi-dry, the other side of the corresponding soft leather board is attached to that side. Adjust the positions of the soft leather board and the decorative paper on the core board, fix the positioning reference, and then perform hot pressing and gluing; After hot pressing and bonding, the board is placed in a cooling and curing equipment and gradually cooled according to the set cooling curve to obtain an ecological board. The feature is that the hot pressing bonding is carried out using a surface hot press, the hot pressing temperature is 110-200℃, the hot pressing time is 2-4 min, and the hot pressing pressure is 12-15 MPa; The progressive cooling process includes the following three stages: Cooling stage one: Cooling from the highest temperature of 200℃ to 150℃, taking 30 minutes; Cooling stage two: Cooling from 150℃ to 100℃, taking 45 minutes; Cooling stage three: Cooling from 100℃ to room temperature (room temperature set to 25℃) takes 120 minutes.

2. The ecological board production process for solving board deformation according to claim 1, characterized in that, The first bio-based polyester layer is a composite layer composed of 60 parts polylactic acid, 40 parts polyhydroxy acid, 0.3 parts coupling agent, and 4 parts water-repellent agent.

3. The ecological board production process for solving board deformation according to claim 1, characterized in that, The second bio-based polyester layer is a composite layer composed of 50 parts polycaprolactone, 30 parts polyhydroxyalkanoate, 0.2 parts coupling agent, and 2 parts water-repellent agent.

4. The ecological board production process for solving board deformation according to claim 3, characterized in that, The coupling agent in both the first and second bio-based polyester layers is silane coupling agent KH-560; the hydrophobic agent in both the first and second bio-based polyester layers is sodium methylsilanolate or potassium methylsilicate.

5. The ecological board production process for solving board deformation according to claim 1, characterized in that, The nano-modified layer is a suspension prepared from any one of nano zinc oxide, nano silicon dioxide, or nano aluminum oxide.

6. The ecological board production process for solving board deformation according to claim 1, characterized in that, After coating the first and second bio-based polyester layers, the temperature for drying to semi-drying is controlled at 130-160℃.

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