A method for producing a no-edge decorative veneer

Abstract

The application discloses a production method of a no-edge decorative wood veneer, which comprises the following steps: S1, selecting a natural wood veneer, polishing at least the bottom surface of the wood veneer to remove burrs on the bottom surface of the wood veneer and make the bottom surface flat, and then softening the wood veneer; S2, adhering a single surface of the wood veneer to a soft film material; S3, performing wire drawing and polishing on the surface of the wood veneer, strengthening the strength of the wood veneer under the support of the film material, and removing burrs on the surface of the wood veneer, so that no cracks and front and back tears appear on the surface of the wood veneer; and S4, adjusting the color of the surface of the wood veneer and the soft film, fixing the shape of the wood veneer by taking the soft film material as a carrier, and strengthening the strength of the wood veneer, so that the wood veneer can bear transverse friction force applied by a polishing device without being torn when polishing, and has very excellent softness and toughness, and can be used for various types of special-shaped coating and plane pressing.

Description

Technical Field

[0001] This invention belongs to the field of decorative material processing technology, specifically a method for producing borderless decorative wood veneer. Background Technology

[0002] Natural wood veneer is widely used in furniture manufacturing, interior decoration, automotive interiors, and consumer electronics surfaces due to its unique texture, warm feel, and high-end appearance.

[0003] However, natural wood veneer is usually used directly after simple softening and polishing, which makes it prone to cracking. In addition, the thickness of wood veneer after processing can reach 0.5mm-1mm. Although it is already very thin, the thickness still feels large to the touch at the edges. Human skin will feel a cutting sensation when touching the edges. However, 0.1mm-0.3mm is the current limit for the thickness of wood veneer that can be processed. Further sanding will cause it to tear due to the friction of the grinding wheel. Summary of the Invention

[0004] The purpose of this invention is to provide a method for producing borderless decorative wood veneer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A method for producing borderless decorative wood veneer includes the following steps: S1: Select natural wood veneer, and polish the bottom surface of the veneer to remove burrs and make it smooth, and then perform a softening treatment. S2: One side of the wood veneer is laminated with a soft film material, the thickness of which is 0.04mm-0.8mm, and the thickness of the laminated product is 0.2mm-1.5mm; S3: The wood veneer surface is brushed and sanded to enhance its strength under the support of the film material, ensuring that no cracks or tears appear on the surface, while removing burrs from the wood veneer surface. S4: Color matching for wood veneer surfaces and soft films.

[0006] In a further technical solution, step S1, the softening process includes the following steps: S1.1: Wash the surface of the wood veneer with clean water, then stretch the wood veneer and let it stand in a greenhouse with a relative humidity of 70%-80% for 6-12 hours to obtain a wood veneer thickness of 0.2mm-0.7mm; S1.2: Apply glycerol solution to the surface of the wood veneer treated in step S1.1, let it stand for a period of no more than 10 minutes; S1.3: Weigh out sodium hydroxide and sodium sulfite, add them to deionized water and mix thoroughly to dissolve; add ammonia to the mixed solution to adjust the pH and obtain a softened solution; the pH value of the mixed solution is not less than 12; S1.4: Apply the softening liquid prepared in step S1.3 to the surface of the wood veneer and air dry it under a relative humidity of 30%. S1.5: Test the moisture content of the wood veneer that is being air-dried, and stop air-drying when the moisture content reaches 30%-40%.

[0007] In a further technical solution, in step S2, the softened wood veneer is dried, and then the bottom surface of the wood veneer is bonded to the soft film material.

[0008] In a further technical solution, in step S1, the wood veneer is softened by steam treatment, in which the natural wood veneer is treated in saturated steam at 100-110℃ for 3-4 minutes to soften the wood veneer. In step S2, the softened wood veneer is removed from the steam and placed in a vacuum chamber together with the soft film material. The soft film material is a multi-layer composite film material, including an outer layer of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and an inner layer of low melting point hot melt adhesive film. The inner layer is in contact with the bottom surface of the wood veneer and is bonded under negative pressure at a vacuum degree ≤ -0.085MPa and a temperature of 70±5℃.

[0009] In a further technical solution, the soft film material is made of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and is bonded to the soft film material by rolling after the wood veneer is coated with adhesive.

[0010] A further technical solution is that the soft film material has two layers: the outer layer is a polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and the inner layer is a low melting point hot melt adhesive film. The inner layer is in contact with the bottom surface of the wood veneer and is melted and bonded to the wood veneer by hot rolling. The heating temperature is 80℃-120℃.

[0011] In a further technical solution, step S2 involves cutting the laminated wood veneer. In step S3, when the wood veneer is sanded and the edge of the veneer is touched, the heat generated by sanding causes the soft film material to melt slightly, and the soft film material and the wood veneer form a gradient transition layer interwoven with wood fibers and polymers at the interface.

[0012] The beneficial effects of this invention are: This invention uses a soft film material as a carrier to fix the shape of the wood veneer and strengthen its strength. When sanding, the wood veneer can withstand the lateral friction force applied by the sanding device without tearing. Using precision sanding equipment, the wood veneer thickness can reach 0.5mm-0.1mm without cracks or tears on the surface, and it is very soft and tough. After color matching, it blends seamlessly with the product color and becomes almost indistinguishable to the naked eye when in use. Based on the perfect fit between the wood veneer and the product, the extremely thin veneer provides almost no abrupt touch when gliding over the edges, thus elevating the product experience to a new level.

[0013] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0014] Figure 1 : A schematic diagram of the production steps of this invention. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0016] Please refer to Figure 1 This invention proposes a method for optimizing the production of decorative wood veneer, enabling the veneer to achieve a seamless feel and eliminating the cutting sensation at the edges during use. The method specifically includes the following steps: S1: Select natural wood veneer and polish the bottom surface of the veneer to remove burrs and make it smooth. Alternatively, you can polish both the top and bottom surfaces of the natural wood veneer. This polishing step is mainly to prepare for the subsequent bonding step. After polishing, soften the veneer and cut and splice the treated veneer into rolls or single sheets. S2: One side of the wood veneer is laminated with a soft film material, the thickness of which is 0.04mm-0.8mm, and the thickness of the laminated product is 0.2mm-1.5mm; S3: Sand the surface of the wood veneer to enhance its strength under the support of the film material, so that no cracks or tears appear on its surface, and remove the burrs on the surface of the wood veneer. Preferably, a gradient sanding method is used, from 80-grit coarse sanding to 400-grit fine sanding, and the sanding depth is controlled to just remove the loose layer on the surface of the wood veneer. S4: Color matching is performed on the wood veneer surface and the soft film. The color is adjusted according to the customer's product specifications. Of course, there are no restrictions on the color matching steps. Specifically, the soft film can be color matched in advance, and then the wood veneer surface can be color matched to achieve the same color inside and out.

[0017] This invention uses a soft film material as a carrier to fix the shape of the wood veneer and strengthen its strength. When sanding, the wood veneer can withstand the lateral friction force applied by the sanding device without tearing. Using precision sanding equipment, the wood veneer thickness can reach 0.5mm-0.1mm without cracks or tears on the surface, and it is very soft and tough. After color matching, it blends seamlessly with the product color and becomes virtually indistinguishable to the naked eye when applied. Based on the perfect fit between the wood veneer and the product, the extremely thin veneer provides almost no abrupt touch when the skin brushes against the edges, further enhancing the product experience. As it is a film material and is bonded with waterproof PUR adhesive, it is waterproof and heat-resistant, possessing excellent softness and toughness, allowing for various irregular wrapping and flat pressing.

[0018] In the production method of the present invention, the softening treatment has different operation methods depending on the different bonding methods of wood veneer and soft film material; Example 1, S1: Select natural wood veneer, polish the bottom surface of the veneer to remove burrs and make it smooth, and then perform a softening treatment, which includes the following steps: S1.1: Wash the surface of the wood veneer with clean water, then stretch the wood veneer and let it stand in a greenhouse with a relative humidity of 70%-80% for 6-12 hours to obtain a wood veneer thickness of 0.2mm-0.7mm. The thickness after treatment will vary depending on the material of the wood veneer. S1.2: Apply glycerol solution to the surface of the wood veneer treated in step S1.1, let it stand for a period of no more than 10 minutes; S1.3: Weigh out sodium hydroxide and sodium sulfite, add them to deionized water and mix thoroughly to dissolve; add ammonia to the mixed solution to adjust the pH and obtain a softened solution; the pH value of the mixed solution is not less than 12; S1.4: Apply the softening liquid prepared in step S1.3 to the surface of the wood veneer and air dry it under a relative humidity of 30%. S1.5: Test the moisture content of the wood veneer that is being air-dried, and stop air-drying when the moisture content reaches 30%-40%.

[0019] S2: After the softened wood veneer is dried, one side of the wood veneer is then bonded to the soft film.

[0020] Preferably, the material of the soft film is polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film. After the wood veneer is coated with glue, it is bonded to the soft film by rolling. After the glue cures, it may reduce the overall flexibility. When bonding with products with large curved surfaces, a winding is used. To address this, an alternative approach is proposed: the flexible film material has two layers. The outer layer is a polyvinyl chloride (PVC), polypropylene (PP), or polyethylene terephthalate (PET) film, and the inner layer is a low-melting-point hot melt adhesive film. The inner layer contacts the bottom surface of the wood veneer and is melted and bonded to the wood veneer through hot rolling. The heating temperature is 80℃-120℃. After cooling, the low-melting-point hot melt adhesive film has good toughness, reduces internal stress, and solves the problems of poor air permeability, brittle adhesive layer, and mismatch with wood veneer deformation caused by traditional glue bonding.

[0021] Example 2, S1: Select natural wood veneer, polish the bottom surface of the veneer to remove burrs and make it smooth, and then perform a softening treatment. In this embodiment, the wood veneer is softened by steam treatment, in which the natural wood veneer is treated in saturated steam at 100-110℃ for 3-4 minutes to soften the wood veneer. S2: The softened wood veneer is removed from the steam and placed in a vacuum chamber together with the soft membrane material. The soft membrane material is a multi-layer composite membrane material, including an outer layer of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and an inner layer of low-melting-point hot melt adhesive film. The inner layer is in contact with the bottom surface of the wood veneer. Negative pressure bonding is carried out under vacuum degree ≤ -0.085MPa and temperature 70±5℃. Taking advantage of the plasticity of the softened wood veneer, a bubble-free, full-area molecular-level tight bonding is achieved under negative pressure.

[0022] The wood veneer formed by this invention needs to be adapted to the size of the user's product in practical applications, that is, it still needs to be cut. In the prior art, it is generally cut according to the shape of the product after the processing and production are completed. However, the cutting is usually done with a cutting knife, which will result in sharp edges that can cut your hands and cause color differences, affecting the effect after bonding. In this embodiment, the cutting step is moved to S2. More specifically, the flexible membrane material has two layers: an outer layer of polyvinyl chloride (PVC), polypropylene (PP), or polyethylene terephthalate (PET) film, and an inner layer of low-melting-point hot melt adhesive film. During cutting, due to the extensibility of PVC, a very small portion of the flexible membrane material will extend beyond the outer layer. In step S3, when the wood veneer is sanded to the edge, the heat generated by sanding causes the flexible membrane material to slightly melt. At the interface, the flexible membrane material and the wood veneer form a gradient transition layer interwoven with wood fibers and polymer, preventing the flexible membrane material from peeling off from the wood veneer and eliminating the feeling of a sharp edge. It also provides waterproofing, preventing moisture intrusion.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for producing a no-edge decorative wood veneer, characterized by: Includes the following steps: S1: Select natural wood veneer, and polish the bottom surface of the veneer to remove burrs and make it smooth, and then perform a softening treatment. S2: One side of the wood veneer is laminated with a soft film material, the thickness of which is 0.04mm-0.8mm, and the thickness of the laminated product is 0.2mm-1.5mm; S3: The wood veneer surface is brushed and sanded to enhance its strength under the support of the film material, ensuring that no cracks or tears appear on the surface, while removing burrs from the wood veneer surface. S4: Color matching for wood veneer surfaces and soft films.

2. The method for producing a no-edge decorative wood veneer according to claim 1, characterized in that: In step S1, the softening process includes the following steps: S1.1: Wash the surface of the wood veneer with clean water, then stretch the wood veneer and let it stand in a greenhouse with a relative humidity of 70%-80% for 6-12 hours to obtain a wood veneer thickness of 0.2mm-0.7mm; S1.2: Apply glycerol solution to the surface of the wood veneer treated in step S1.1, let it stand for a period of no more than 10 minutes; S1.3: Weigh out sodium hydroxide and sodium sulfite, add them to deionized water and mix thoroughly to dissolve; add ammonia to the mixed solution to adjust the pH and obtain a softened solution; the pH value of the mixed solution is not less than 12; S1.4: Apply the softening liquid prepared in step S1.3 to the surface of the wood veneer and air dry it under a relative humidity of 30%. S1.5: Test the moisture content of the wood veneer that is being air-dried, and stop air-drying when the moisture content reaches 30%-40%.

3. The method of producing a no-edge decorative wood veneer according to claim 2, wherein: In step S2, the softened wood veneer is dried, and then the bottom surface of the wood veneer is bonded to the soft film material.

4. The method of producing a no-wait decorative wood veneer according to claim 1, wherein: In step S1, the wood veneer is softened by steam treatment, in which the natural wood veneer is treated in saturated steam at 100-110℃ for 3-4 minutes to soften the wood veneer. In step S2, the softened wood veneer is removed from the steam and placed in a vacuum chamber together with the soft film material. The soft film material is a multi-layer composite film material, including an outer layer of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and an inner layer of low melting point hot melt adhesive film. The inner layer is in contact with the bottom surface of the wood veneer and is bonded under negative pressure at a vacuum degree ≤ -0.085MPa and a temperature of 70±5℃.

5. A method for producing edgeless decorative wood veneer according to claim 1 or 2, characterized in that: The soft membrane material is made of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET), and is bonded to the wood veneer by rolling after the wood veneer is coated with adhesive.

6. A method for producing edgeless decorative wood veneer according to any one of claims 1-4, characterized in that: The soft film material has two layers: the outer layer is a polyvinyl chloride (PVC), polypropylene (PP) or polyethylene terephthalate (PET) film, and the inner layer is a low melting point hot melt adhesive film. The inner layer is in contact with the bottom surface of the wood veneer and is melted and bonded to the wood veneer by hot rolling. The heating temperature is 80℃-120℃.

7. The method for producing a borderless decorative wood veneer according to claim 6, characterized in that: In step S2, the laminated wood veneer is cut; In step S3, when the wood veneer is sanded and the edge of the veneer is touched, the heat generated by sanding causes the soft film material to melt slightly, and the soft film material and the wood veneer form a gradient transition layer interwoven with wood fibers and polymers at the interface.

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