A coated veneer and a method for manufacturing the same, and a method for manufacturing an ecological board

Abstract

The present application belongs to the technical field of artificial board, and particularly relates to a kind of veneer with decorative surface and a preparation method thereof, and a preparation method of ecological board.The veneer with decorative surface is obtained by pasting non-woven fabric to veneer, sanding the veneer with non-woven fabric to obtain sanded veneer, and then hot pressing the sanded veneer with wear-resistant resin and steel plate to obtain the veneer with decorative surface.The wear-resistant resin comprises acrylic resin and additives, and the wear-resistant additives comprise aluminum oxide and / or polytetrafluoroethylene.The present application uses wear-resistant resin as the decorative material, wherein the main agent of the wear-resistant resin is acrylic resin, which is soft in texture and can be pressed with various steel plate textures by steel plate to improve the diversity of decoration.Meanwhile, the present application uses wear-resistant additives to compound with acrylic resin, which can significantly improve the scratch resistance and wear resistance of the veneer with decorative surface.

Description

Technical Field

[0001] This invention belongs to the field of engineered wood products technology, specifically relating to a coated decorative veneer and its preparation method, and a method for preparing an eco-friendly board. Background Technology

[0002] Impregnated paper-faced plywood or blockboard, also known in the market as eco-board or melamine-faced board, is a new type of interior decoration material that has become a major material in interior decoration. Currently, eco-boards can be divided into ordinary eco-boards and UV-faced engineered wood boards. Ordinary eco-boards are made by laminating melamine-impregnated paper onto engineered wood veneers to form a veneer, which is then laminated to a substrate to create the eco-board. UV-faced engineered wood boards have a surface finish applied to the substrate using 3D printing or UV paint, followed by a protective paint layer.

[0003] Among them, the ecological board made of melamine-impregnated paper has poor scratch resistance and wear resistance. UV-coated artificial boards become hard and brittle after being cured by ultraviolet light, and steel plate textures cannot be pressed onto the surface; at the same time, UV-coated artificial boards use a lot of paint, resulting in high content of heavy metals and TVOCs. Summary of the Invention

[0004] The purpose of this invention is to provide a coated decorative veneer and its preparation method, as well as a method for preparing an eco-friendly board. The coated decorative veneer provided by this invention can enhance the diversity of decoration by pressing various steel plate textures onto the steel plate, while improving its scratch resistance and wear resistance. Furthermore, the coated decorative veneer and eco-friendly board provided by this invention have low content of heavy metals and TVOC.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a method for preparing coated decorative veneer, comprising the following steps: By pasting non-woven fabric onto the veneer, a non-woven wood veneer is obtained; The non-woven wood veneer veneer is sanded to obtain a sanded veneer. The sanded veneer is coated with wear-resistant resin and then hot-pressed with a steel plate to obtain the coated decorative veneer. The coated decorative veneer has a steel plate texture. The wear-resistant resin includes acrylic resin and additives. The additives include wear-resistant additives, which include aluminum oxide and / or polytetrafluoroethylene. The mass percentage of the wear-resistant additives to the mass of the acrylic resin is 10-15%.

[0006] Preferably, after pasting the non-woven fabric, the initial non-woven wood veneer is directly obtained. The method further includes preheating and pressing the initial non-woven wood veneer to obtain the non-woven wood veneer. The preheating and pressing conditions include: a preheating and pressing temperature of 100~140℃, a preheating and pressing unit pressure of 0.5~0.8MPa, and a preheating and pressing time of 15~30s.

[0007] Preferably, the alumina has a mesh size of 600-800 mesh; the additives also include a light-shielding agent, the mass of which accounts for 5-10% of the mass of the acrylic resin.

[0008] Preferably, the light-masking agent comprises titanium dioxide, and the particle size of the titanium dioxide is 10~100nm.

[0009] Preferably, the veneer includes engineered wood veneer or solid wood veneer; the adhesive used for bonding includes EVA hot melt adhesive and / or PUR hot melt adhesive; the sanding is performed using a sander with 360 mesh sanding belt.

[0010] Preferably, the coating amount of the wear-resistant resin is 50~80g / m². 2 .

[0011] Preferably, the conditions for the hot pressing process include: a hot pressing temperature of 170~190℃, a hot pressing unit pressure of 0.9~1.5MPa, and a hot pressing time of 20~60s.

[0012] The present invention provides a coated decorative veneer prepared by the preparation method described in the above technical solution.

[0013] This invention provides a method for preparing an eco-friendly board, which is prepared using the coated decorative veneer described in the above technical solution.

[0014] Preferred options include method one or method two; Method 1 includes: assembling the coated decorative veneer, connecting paper, substrate, connecting paper and coated decorative veneer in sequence from bottom to top, and then performing hot pressing to obtain the eco-board; Method 2 includes: coating the upper and lower surfaces of the substrate with glue, then assembling the decorative veneer separately, and then sequentially performing aging, cold pressing and hot pressing to obtain the eco-board.

[0015] This invention provides a method for preparing a coated decorative veneer, comprising the following steps: pasting a veneer with non-woven fabric to obtain a non-woven wood veneer; sanding the non-woven wood veneer to obtain a sanded veneer; coating the sanded veneer with a wear-resistant resin and then hot-pressing it with a steel plate to obtain the coated decorative veneer. The coated decorative veneer has a steel plate texture. The wear-resistant resin includes acrylic resin and additives, the additives including wear-resistant additives, which include aluminum oxide and / or polytetrafluoroethylene. The mass percentage of the wear-resistant additives to the mass of the acrylic resin is 10-15%. This invention uses a wear-resistant resin as the decorative material, wherein the main component of the wear-resistant resin is acrylic resin. Acrylic resin is soft and can be pressed with various steel plate textures, enhancing the diversity of decoration. Simultaneously, this invention uses a wear-resistant additive compounded with acrylic resin. Through the wear-resistant additive, the scratch resistance and wear resistance of the coated decorative veneer can be significantly improved. Meanwhile, the coated decorative veneer provided by this invention reduces the amount of paint used and has low content of heavy metals and TVOCs.

[0016] Furthermore, in this invention, the additives also include a light-shielding agent, the mass of which accounts for 5-10% of the mass of the acrylic resin. The light-shielding agent includes titanium dioxide, the particle size of which is 10-100 nm. This invention, by compounding a light-shielding agent into the wear-resistant resin, can reduce the radiation effect of ultraviolet light on the product and improve its lightfastness.

[0017] Furthermore, the veneer described in this invention includes engineered wood veneer or solid wood veneer. This invention uses veneer (engineered wood veneer or solid wood veneer) to prepare coated decorative veneers, enhancing the overall high-end, customized feel of the board. Detailed Implementation

[0018] This invention provides a method for preparing coated decorative veneer, comprising the following steps: By pasting non-woven fabric onto the veneer, a non-woven wood veneer is obtained; The non-woven wood veneer veneer is sanded to obtain a sanded veneer. The sanded veneer is coated with wear-resistant resin and then hot-pressed with a steel plate to obtain the coated decorative veneer. The coated decorative veneer has a steel plate texture. The wear-resistant resin includes acrylic resin and additives. The additives include wear-resistant additives, which include aluminum oxide and / or polytetrafluoroethylene. The mass percentage of the wear-resistant additives to the mass of the acrylic resin is 10-15%.

[0019] In this invention, unless otherwise specified, all raw materials / components used in the preparation are commercially available products well known to those skilled in the art.

[0020] This invention involves bonding non-woven fabric to a veneer to obtain a non-woven wood veneer. In this invention, the veneer preferably includes engineered wood veneer or solid wood veneer. The adhesive used for bonding preferably includes EVA hot melt adhesive and / or PUR hot melt adhesive. This invention does not have special requirements for the adhesive; it only needs to be able to bond the non-woven fabric to the veneer.

[0021] This invention directly yields initial non-woven wood veneer veneer after pasting non-woven fabric. Following the initial non-woven wood veneer veneer, the invention further includes preheating and pressing the initial non-woven wood veneer veneer veneer to obtain the final non-woven wood veneer veneer veneer. In this invention, the preheating and pressing conditions preferably include: a preheating and pressing temperature preferably of 100~140℃, more preferably 110~130℃; a preheating and pressing unit pressure preferably of 0.5~0.8MPa, more preferably 0.6~0.7MPa; and a preheating and pressing time preferably of 15~30s, more preferably 18~25s.

[0022] After obtaining the non-woven wood veneer, the present invention performs sanding treatment on the non-woven wood veneer to obtain sanded veneer. In the present invention, the sanding treatment is preferably performed using a sanding machine, and the mesh size of the sanding belt used for the sanding treatment is preferably 360 mesh.

[0023] After obtaining the sanded veneer, the present invention coats the sanded veneer with a wear-resistant resin and then performs hot-pressing treatment with a steel plate to obtain the coated decorative veneer. The coated decorative veneer has a steel plate texture. The wear-resistant resin includes acrylic resin and additives. The additives include wear-resistant additives, which include aluminum oxide and / or polytetrafluoroethylene (PTFE). The mass percentage of the wear-resistant additives to the mass of the acrylic resin is 10-15%, and in the examples, it can be 10%, 11%, 12%, 13%, 14%, or 15%. The mesh size of the aluminum oxide can be 600-800 mesh. In the present invention, the additives preferably also include a light-shielding agent. The mass percentage of the light-shielding agent to the mass of the acrylic resin is preferably 5-10%, and in the examples, it can be 5%, 6%, 7%, 8%, 9%, or 10%. The light-shielding agent preferably includes titanium dioxide. The particle size of the titanium dioxide is preferably 10-100 nm, more preferably 20-80 nm.

[0024] In this invention, the coating amount of the wear-resistant resin is preferably 50~80 g / m². 2 More preferably 60~70g / m 2 The present invention does not have any special requirements for the specific implementation of the coating.

[0025] In this invention, the preferred conditions for the hot-pressing process include: a hot-pressing temperature of 170-190°C, more preferably 175-185°C; a hot-pressing unit pressure of 0.9-1.5 MPa, more preferably 1-1.4 MPa; and a hot-pressing time of 20-60 seconds, more preferably 30-50 seconds.

[0026] The present invention provides a coated decorative veneer prepared by the preparation method described in the above technical solution.

[0027] This invention provides a method for preparing an eco-friendly board, which is prepared using the coated decorative veneer described in the above technical solution.

[0028] In this invention, the method for preparing the ecological board preferably includes method one or method two.

[0029] In this invention, the preferred method includes: assembling a coated decorative veneer, connecting paper, a substrate, connecting paper, and coated decorative veneer sequentially from bottom to top, followed by hot-pressing to obtain the eco-board. In this invention, the substrate preferably includes a plywood substrate, a particleboard substrate, or a MDF substrate. The hot-pressing is preferably performed in a double-sided single-layer press, and the preferred hot-pressing conditions include: a hot-pressing temperature of 140±5℃, a hot-pressing time of 120±30s, and a hot-pressing pressure of 7~12MPa, more preferably 9~11MPa.

[0030] In this invention, the second method preferably includes: coating the upper and lower surfaces of the substrate with adhesive, then assembling the decorative veneers, and then sequentially performing aging, cold pressing, and hot pressing to obtain the eco-board. In this invention, the substrate preferably includes a plywood substrate, a particleboard substrate, or a MDF substrate. The adhesive preferably includes urea-formaldehyde resin adhesive, formaldehyde-free adhesive, or polyurethane adhesive. The adhesive application amount is preferably 180~200 g / m³. 2 In the examples, it can be 190g / m 2 The present invention does not have specific requirements for the specific implementation of the placement method. In the present invention, the cold pressing conditions include: a cold pressing pressure preferably of 5±1 MPa and a cold pressing time preferably of 60±15 min. The hot pressing conditions include: a hot pressing temperature preferably of 80~100℃, a hot pressing time preferably of 9±1 min, and a hot pressing pressure preferably of 3~5 MPa.

[0031] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0032] Example 1 This embodiment provides a method for preparing a coated decorative veneer, specifically including the following steps: (1) Apply non-woven fabric to engineered wood veneer or solid wood veneer. The veneer is applied using EVA hot melt adhesive or PUR hot melt adhesive. After application, the veneer is hot-pressed using a hot press machine at a temperature of 120°C, a unit pressure of 0.6 MPa, and a pressing time of 20 seconds.

[0033] (2) The non-woven wood veneer veneer obtained in step (1) is sanded with a sander to sand the surface layer of the veneer with a 360-mesh sander belt to improve the surface smoothness.

[0034] (3) Pass the product obtained in step (3) through a roller coating line. Coat a layer of wear-resistant resin, with a coating amount of 75 g / m. 2 The wear-resistant resin includes acrylic resin, aluminum oxide (600-800 mesh) and titanium dioxide (50nm particle size), wherein the mass of aluminum oxide accounts for 10% of the mass of acrylic resin and the mass of titanium dioxide accounts for 5% of the mass of acrylic resin.

[0035] (4) The product obtained in step (3) is hot-pressed with steel plate. The hot-pressing parameters are: temperature is 180℃, time is 30s, unit pressure is 1.2±0.3MPa, and the steel plate texture is pressed to obtain a coated decorative single panel.

[0036] This embodiment provides a method for preparing an ecological board, specifically including the following steps: The coated decorative veneer, connecting paper, substrate (jointed wood substrate, plywood substrate, particleboard substrate, MDF substrate), connecting paper, and coated decorative veneer are assembled from bottom to top and placed into a double-sided single-layer press for hot pressing and bonding. The hot pressing parameters are: temperature 140±5℃, time 120±30s, and pressure 10MPa.

[0037] Example 2 This embodiment provides a method for preparing a coated decorative veneer, specifically including the following steps: (1) Apply non-woven fabric to engineered wood veneer or solid wood veneer. The veneer is glued with EVA hot melt adhesive or PUR hot melt adhesive. After gluing, it is hot-pressed by a hot press machine at a temperature of 130℃, a unit pressure of 0.8MPa, and a pressing time of 30 seconds.

[0038] (2) The non-woven wood veneer veneer obtained in step (1) is sanded with a sander to sand the surface layer of the veneer with a 360-mesh sander belt to improve the surface smoothness.

[0039] (3) Pass the product obtained in step (3) through a roller coating line. Coat a layer of wear-resistant resin, with a coating amount of 55 g / m. 2The wear-resistant resin includes acrylic resin, aluminum oxide (600-800 mesh) and titanium dioxide (50nm particle size), wherein the mass of aluminum oxide accounts for 15% of the mass of acrylic resin and the mass of titanium dioxide accounts for 10% of the mass of acrylic resin.

[0040] (4) The product obtained in step (3) is hot-pressed with steel plate. The hot-pressing parameters are: temperature is 185℃, time is 40s, unit pressure is 1.2±0.3MPa, and the steel plate texture is pressed to obtain a coated decorative single panel.

[0041] This embodiment provides a method for preparing an ecological board, specifically including the following steps: The substrate (blockboard, plywood, particleboard, or MDF) is coated with adhesive (urea-formaldehyde resin, formaldehyde-free adhesive, or polyurethane adhesive) using an adhesive applicator, with an adhesive application rate of 190g / m². 2 Decorative veneers are coated on both sides of the substrate, and the finished product is prepared through aging, cold pressing, and hot pressing. Cold pressing conditions: pressure 5±1MPa, time 60±15min; hot pressing conditions: hot pressing temperature: 90℃, hot pressing time: 9±1min, hot pressing pressure: 4±1MPa.

[0042] Comparative Example 1 Ordinary melamine-impregnated paper-faced engineered wood panels. The specific preparation method of the ordinary melamine-impregnated paper-faced engineered wood panels in this comparative example includes: Method 1: Apply adhesive (urea-formaldehyde resin, formaldehyde-free adhesive, or polyurethane adhesive) to the substrate (blockboard, plywood, particleboard, or MDF) using an adhesive applicator, with an application rate of 190g / m². 2 Method 1: A composite veneer of engineered wood melamine-impregnated paper is bonded to both sides of a substrate. After aging, cold pressing, and hot pressing, the finished product is prepared. Cold pressing conditions: pressure 5±1 MPa, time 30±15 min; Hot pressing conditions: hot pressing temperature: 90℃, hot pressing time: 9±1 min, hot pressing pressure: 4±1 MPa. Method 2: A melamine-impregnated paper composite veneer, connecting paper, substrate (joint wood substrate, plywood substrate, particleboard substrate, or MDF substrate) is bonded to a double-sided single-layer press and hot-pressed. Hot-pressing parameters: temperature 190±10℃, time 60±20 s, pressure 12 MPa.

[0043] Comparative Example 2 The preparation method is basically the same as that in Example 1, except that aluminum oxide is omitted.

[0044] Comparative Example 3 The preparation method is basically the same as that in Example 1, except that titanium dioxide is omitted.

[0045] Test case The performance of the ecological board prepared in Example 1 and the ordinary melamine-impregnated paper-faced artificial board provided in Comparative Example 1 were tested, and the test results are shown in Table 1. The test methods for each item in Table 1 are GB / T 17657.

[0046] Table 1 Performance test results of the ecological board prepared in Example 1

[0047] As can be seen from the above embodiments, this invention uses wear-resistant resin as the surface material, wherein the main component of the wear-resistant resin is acrylic resin. Acrylic resin has a soft texture and can be pressed onto steel plates to create various steel plate textures, enhancing the diversity of decoration. Simultaneously, this invention uses wear-resistant additives compounded with acrylic resin. These additives significantly improve the scratch and wear resistance of the coated veneer. Furthermore, this invention uses veneers (engineered wood veneers or solid wood veneers) to prepare the coated veneer, enhancing the overall high-end, customized feel of the board.

[0048] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. Other embodiments can be obtained based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for preparing a coated decorative veneer, characterized in that, Includes the following steps: The veneer is glued with non-woven fabric to obtain the initial non-woven wood veneer veneer. The initial non-woven wood veneer veneer veneer is preheated and pressed to obtain the non-woven wood veneer veneer veneer. The preheating and pressing conditions include: a preheating and pressing temperature of 100~140℃, a preheating and pressing unit pressure of 0.5~0.8MPa, and a preheating and pressing time of 15~30s; The non-woven wood veneer veneer is sanded to obtain a sanded veneer. The sanded veneer is coated with wear-resistant resin and then hot-pressed with a steel plate to obtain the coated decorative veneer. The coated decorative veneer has a steel plate texture. The wear-resistant resin includes acrylic resin and additives. The additives include wear-resistant additives and light-shielding agents. The wear-resistant additive is aluminum oxide with a mesh size of 600-800 mesh. The mass percentage of the wear-resistant additive to the acrylic resin is 10-15%. The light-shielding agent is titanium dioxide with a particle size of 10-100 nm. The mass percentage of the light-shielding agent to the acrylic resin is 5-10%.

2. The preparation method according to claim 1, characterized in that, The veneer includes engineered wood veneer or solid wood veneer; the adhesive used for bonding includes EVA hot melt adhesive and / or PUR hot melt adhesive; the sanding process is carried out using a sander with a sanding belt of 360 mesh.

3. The preparation method according to claim 1, characterized in that, The coating amount of the wear-resistant resin is 50~80g / m². 2 .

4. The preparation method according to claim 1, characterized in that, The conditions for the hot pressing process include: hot pressing temperature of 170~190℃, hot pressing unit pressure of 0.9~1.5MPa, and hot pressing time of 20~60s.

5. The coated decorative veneer prepared by the preparation method according to any one of claims 1 to 4.

6. A method for preparing an ecological board, characterized in that, The coated decorative veneer as described in claim 5 is used for preparation.

7. The preparation method according to claim 6, characterized in that, This includes either method one or method two; Method 1 includes: assembling the decorative veneer, connecting paper, substrate, connecting paper and decorative veneer in sequence from bottom to top, and then hot-pressing them together to obtain the eco-board; Method 2 includes: coating the upper and lower surfaces of the substrate with adhesive, then assembling the decorative veneer panels respectively, and then sequentially performing aging, cold pressing and hot pressing to obtain the eco-board.

Images