Preparation method of A-grade fireproof simulation wood grain board

Abstract

The invention relates to the technical field of preparation of simulation wood grain fireproof plates, in particular to a preparation method of an A-grade fireproof simulation wood grain plate, which comprises the following steps: S1, manufacturing a mother set; s2, manufacturing a nickel plate; s3, manufacturing a mother film; s4, modifying the image; s5, filling the inorganic panel; s6, manufacturing a bottom color on the inorganic panel; s7, performing digital printing; and S8, textures are manufactured on the inorganic panel. The simulation wood grain board prepared by the invention can directly carve wood grains, the wood grain effect is vivid, and meanwhile, the prepared simulation wood grains are low in surface roughness and high in smoothness.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of simulated wood grain fireproof boards, and in particular to a preparation method of a grade A fireproof simulated wood grain board. Background Art

[0002] Artificial wood grain is a decorative effect that simulates the texture and appearance of real wood through various techniques. It can be applied to a variety of surfaces to create a realistic-looking effect, while also possessing properties or advantages that real wood lacks.

[0003] Existing high-fidelity wood grain panels often possess other properties, one of which is fire resistance. By processing wood grain panels made from unique materials, the resulting simulated wood grain panels possess fire resistance. Inorganic panels, such as calcium carbonate panels and perlite panels, are commonly used fire-resistant panels, offering excellent fire resistance. Modern high-fidelity wood grain panels replicate wood grain materials onto these inorganic panels. High-fidelity synchronized wood grain digitally printed panels are manufactured using digital film pressing technology. Existing high-fidelity synchronized wood grain digitally printed panels suffer from insufficient fidelity in the wood grain imitation and a high degree of surface roughness. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing a Class A fireproof simulated wood grain board to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for preparing a Class A fireproof simulated wood grain board comprises the following steps:

[0007] S1. Make a master: Select natural wood, polish it by hand, and use a high-precision scanner to scan the polished natural wood at a resolution of 400 DPI to obtain a high-resolution texture image;

[0008] S2. Making a nickel plate: Place the polished wood board in step S1 into a sealable container, apply a thermosetting resin to the polished wood board surface, heat and pressurize the container after evenly applying the resin, and peel off the board from the resin after complete solidification. Use electrostatic adsorption to evenly apply nickel powder to the resin template to a thickness of 3 mm. After forming and solidification, peel off the nickel plate to complete the production;

[0009] S3, making a mother film: coating UV glue on the nickel plate obtained in step S2, covering the surface of the UV glue with a PET film, and then separating the PET film from the nickel plate to obtain a PET film with a replica texture;

[0010] S4. Modify the image: Use Photoshop or other tools to perform color separation processing on the texture image obtained in step S1, repair surface defects, convert it into TIF format and transmit it to the digital printing control computer. The control computer converts the image into a digital signal and completes the image printing by controlling the switch of the inkjet system. The digital printing is 4 colors + white background, and the 4 colors are red, yellow, blue and black;

[0011] S5. Filling on the inorganic panel: Sand the surface of the inorganic panel with 240-grit sandpaper; then roll-coat the UV penetrating primer on the sanded inorganic panel and cure it; finally, roll-coat a layer of UV adhesion putty and a layer of UV filling putty on the surface of the UV penetrating primer and cure them;

[0012] S6. Making a base color on the inorganic panel: Roll-coat a layer of UV white primer on the inorganic panel treated in step S5 and then cure it; then roll-coat two layers of color topcoat on the UV white primer and then cure it;

[0013] S7, digital printing: using a digital printer to print the digital image modified in step S4 onto the inorganic panel processed in step S6, and then rolling a layer of sanding UV primer on the printed image and curing it;

[0014] S8. Creating a texture on the inorganic panel: First, sand the surface of the inorganic panel treated in step S7 using 400-grit sandpaper, then roll-coat a layer of UV film pressing topcoat on the sanded inorganic panel, press a PET film onto the surface of the UV film pressing topcoat, and after curing, separate the PET film to obtain a Class A fireproof simulated wood grain board;

[0015] The UV film pressing topcoat is mixed with modified nano silicon dioxide particles, and the mass ratio between the modified nano silicon dioxide and the UV film pressing topcoat is 1:(50-120).

[0016] Furthermore, in step S2, 5-8 kg of thermosetting resin is applied per square meter on the polished template surface, the pressure in the container is 0.6-0.8 MPa, the heating temperature is 80-120° C., and the heating and pressurizing time is 5-8 hours.

[0017] Furthermore, the coating amount of the UV penetrating primer in step S5 is 20-35 g / m 2 , UV curing energy is 200-250mJ / cm 2 , the curing degree is 70-85%; the coating amount of UV adhesive putty is 10-20g / m 2 , UV curing energy is 300-400mJ / cm 2 , the curing degree is 70-90%; the coating amount of UV filling putty is 10-20g / m 2 , UV curing energy is 400-450mJ / cm2 , the degree of curing is 100%.

[0018] Furthermore, the coating amount of the UV white primer in step S6 is 15-25 g / m 2 , UV curing energy is 150-200mJ / cm 2 , the curing degree is 80-85%; the coating amount of each color topcoat is 15-25g / m 2 , UV curing energy is 250-350mJ / cm 2 , the degree of curing is 90-100%.

[0019] Furthermore, the coating amount of the sanding UV primer in step S7 is 30-40 g / m 2 , UV curing energy is 350-500mJ / cm 2 , the degree of curing is 100%.

[0020] Furthermore, the coating amount of the UV film pressing topcoat in step S8 is 200-300g / m 2 , UV curing energy is 300-400mJ / cm 2 .

[0021] Furthermore, the preparation method of the modified nano-silica is as follows:

[0022] S101, ultrasonically dispersing nano-silica with a particle size of 10-30 nm into a 0.1-0.5 mol / L hydrochloric acid solution and soaking for 0.5-1 h, filtering, and washing the product with sufficient deionized water and calcining at 400-550° C. for 2-4 h;

[0023] S102, dispersing the nano-silica treated in step S101 into a mixed solution of 1-butyl-3-methylimidazolium tetrafluoroborate, choline chloride, β-cyclodextrin, DMF and deionized water, heating to 50-65° C. for reaction for 1-3 hours, filtering, and washing the product with sufficient deionized water and then vacuum drying at 20-40° C.;

[0024] S103, dispersing the nano-silica treated in step S102 into a mixed solution of γ-glycidyloxypropyltrimethoxysilane and toluene, heating to 70-110° C. and reacting for 6-12 hours, filtering, washing the product with sufficient ethanol, and vacuum drying at 20-40° C. to obtain modified nano-silica.

[0025] Furthermore, in step S101, the mass ratio between the nano-silicon dioxide and the hydrochloric acid solution is 1:(12-18).

[0026] Furthermore, the mass ratio of 1-butyl-3-methylimidazolium tetrafluoroborate, choline chloride, β-cyclodextrin, DMF and deionized water in step S102 to the nano-silica used in step S101 is 1:(0.5-3):(1-4):(60-80):(50-70):(10-20).

[0027] Furthermore, the mass ratio of γ-glycidyloxypropyltrimethoxysilane and toluene in step S103 to the nano-silica used in step S101 is 1:24:2.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention directly replicates the simulated wood grain on the template onto the PET film through nickel electroplating. The wood grain simulation degree is high through the combination of the PET film and the film pressing topcoat. At the same time, during the film pressing process, the present invention can effectively reduce the surface roughness of the topcoat by doping modified nano-silica into the film pressing topcoat, making its gloss display better. The present invention uses an inorganic panel as a substrate, which has excellent fire resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a process flow chart for preparing Class A fireproof simulated wood grain board according to the present invention;

[0031] Figure 2 The process flow chart of the present invention for preparing modified nano-silica. DETAILED DESCRIPTION

[0032] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] See also Figure 1-2 , the present invention provides a technical solution:

[0034] Example 1

[0035] A method for preparing a Class A fireproof simulated wood grain board comprises the following steps:

[0036] S1. Make a master: Select natural wood, polish it by hand, and use a high-precision scanner to scan the polished natural wood at a resolution of 400 DPI to obtain a high-resolution texture image;

[0037] S2, making a nickel plate: placing the polished wood board in step S1 into a sealable container, applying 6 kg of thermosetting resin per square meter to the polished wood board surface, applying a pressure of 0.7 MPa, heating to 110° C., and heating and pressing for 7 hours. After the coating is evenly applied, the container is heated and pressurized. After complete solidification, the board and the resin are peeled off. Using electrostatic adsorption, nickel powder is evenly applied to the resin template to a thickness of 3 mm. After forming and curing, the nickel plate is peeled off to complete the production;

[0038] S3, making a mother film: coating UV glue on the nickel plate obtained in step S2, covering the surface of the UV glue with a PET film, and then separating the PET film from the nickel plate to obtain a PET film with a replica texture;

[0039] S4. Modify the image: Use Photoshop or other tools to perform color separation processing on the texture image obtained in step S1, repair surface defects, convert it into TIF format and transmit it to the digital printing control computer. The control computer converts the image into a digital signal and completes the image printing by controlling the switch of the inkjet system. The digital printing is 4 colors + white background, and the 4 colors are red, yellow, blue and black;

[0040] S5. Filling on the inorganic panel: Sand the surface of the inorganic panel with 240-grit sandpaper; then roll-coat the UV penetrating primer on the sanded inorganic panel surface. The coating amount of the UV penetrating primer is 30g / m 2 , UV curing energy is 220mJ / cm 2 , the curing degree is 80%; finally, a layer of UV adhesion putty and a layer of UV filling putty are rolled on the surface of UV penetrating primer, and the coating amount of UV adhesion putty is 15g / m 2 , UV curing energy is 350mJ / cm 2 , the curing degree is 85%; the coating amount of UV filling putty is 15g / m 2 , UV curing energy is 430mJ / cm 2 , the degree of curing is 100%;

[0041] S6. Making a base color on the inorganic panel: Roll-coat a layer of UV white primer on the inorganic panel treated in step S5. The coating amount of the UV white primer is 20 g / m 2 , UV curing energy is 180mJ / cm 2 , the curing degree is 82%; then roll two layers of color topcoat on the UV white primer, and the coating amount of each layer of color topcoat is 20g / m 2 , UV curing energy is 300mJ / cm 2 , the degree of curing is 95%;

[0042] S7, digital printing: Use a digital printer to print the digital image modified in step S4 onto the inorganic panel processed in step S6, and then roll a layer of sanding UV primer on the printed image. The coating amount of the sanding UV primer is 35g / m 2 , UV curing energy is 450mJ / cm 2 , the degree of curing is 100%;

[0043] S8, making texture on the inorganic panel: first use 400 mesh sandpaper to sand the surface of the inorganic panel treated in step S7, and then roll a layer of UV film pressing topcoat on the sanded inorganic panel. The coating amount of the UV film pressing topcoat is 250g / m 2 , press the PET film onto the UV film pressing topcoat surface and then cure it with a curing energy of 350mJ / cm 2 After curing is completed, the PET film is separated to obtain a Class A fireproof simulated wood grain board;

[0044] The UV film pressing topcoat is mixed with modified nano-silica particles, and the mass ratio between the modified nano-silica and the UV film pressing topcoat is 1:100.

[0045] The preparation method of the modified nano-silica is as follows:

[0046] S101, ultrasonically dispersing 56 g of nano-silica with a particle size of 20 nm into 840 g of a 0.2 mol / L hydrochloric acid solution and soaking for 0.8 h, filtering, and washing the product with sufficient deionized water and calcining it at 500° C. for 3 h;

[0047] S102, dispersing the nano-silica treated in step S101 into a mixed solution of 4.7 g 1-butyl-3-methylimidazolium tetrafluoroborate, 9.4 g choline chloride, 15.5 g β-cyclodextrin, 329 g DMF and 280 g deionized water, heating to 55° C. for 2 h, filtering, and washing the product with sufficient deionized water and then drying it in vacuo at 30° C.;

[0048] S103, dispersing the nano-silica treated in step S102 into a mixed solution of 28 g of γ-glycidyloxypropyltrimethoxysilane and 672 g of toluene and heating the solution to 80° C. for 10 h, filtering the solution, washing the solution with sufficient ethanol, and vacuum drying the solution at 30° C. to obtain modified nano-silica.

[0049] Example 2

[0050] A method for preparing a Class A fireproof simulated wood grain board comprises the following steps:

[0051] S1. Make a master: Select natural wood, polish it by hand, and use a high-precision scanner to scan the polished natural wood at a resolution of 400 DPI to obtain a high-resolution texture image;

[0052] S2, making a nickel plate: placing the polished wood board in step S1 into a sealable container, applying 5-8 kg of thermosetting resin per square meter to the polished wood board surface, applying a pressure of 0.6 MPa, heating to 80°C, and heating and pressing for 5 hours. After the coating is evenly applied, the container is heated and pressurized. After complete solidification, the board and the resin are peeled off. Using electrostatic adsorption, nickel powder is evenly applied to the resin template to a thickness of 3 mm. After forming and curing, the nickel plate is peeled off to complete the production;

[0053] S3, making a mother film: coating UV glue on the nickel plate obtained in step S2, covering the surface of the UV glue with a PET film, and then separating the PET film from the nickel plate to obtain a PET film with a replica texture;

[0054] S4. Modify the image: Use Photoshop or other tools to perform color separation processing on the texture image obtained in step S1, repair surface defects, convert it into TIF format and transmit it to the digital printing control computer. The control computer converts the image into a digital signal and completes the image printing by controlling the switch of the inkjet system. The digital printing is 4 colors + white background, and the 4 colors are red, yellow, blue and black;

[0055] S5. Filling on the inorganic panel: Sand the surface of the inorganic panel with 240-grit sandpaper; then roll-coat the UV penetrating primer on the sanded inorganic panel surface. The coating amount of the UV penetrating primer is 20g / m 2 , UV curing energy is 200mJ / cm 2 , the curing degree is 70%; finally, a layer of UV adhesion putty and a layer of UV filling putty are rolled on the surface of UV penetrating primer, and the coating amount of UV adhesion putty is 10g / m 2 , UV curing energy is 300mJ / cm 2 , the curing degree is 70%; the coating amount of UV filling putty is 10g / m 2 , UV curing energy is 400mJ / cm 2 , the degree of curing is 100%;

[0056] S6. Making a base color on the inorganic panel: Roll-coat a layer of UV white primer on the inorganic panel treated in step S5. The coating amount of the UV white primer is 15 g / m 2 , UV curing energy is 150mJ / cm 2 , the curing degree is 80%; then roll two layers of color topcoat on the UV white primer, and the coating amount of each layer of color topcoat is 15g / m 2, UV curing energy is 250mJ / cm 2 , the degree of curing is 90%;

[0057] S7, digital printing: Use a digital printer to print the digital image modified in step S4 onto the inorganic panel processed in step S6, and then roll a layer of sanding UV primer on the printed image. The coating amount of the sanding UV primer is 30g / m 2 , UV curing energy is 350mJ / cm 2 , the degree of curing is 100%;

[0058] S8, making texture on the inorganic panel: first use 400 mesh sandpaper to sand the surface of the inorganic panel treated in step S7, and then roll a layer of UV film pressing paint on the sanded inorganic panel. The coating amount of the UV film pressing paint is 200g / m 2 , press the PET film onto the UV film pressing topcoat surface and then cure it with a curing energy of 300mJ / cm 2 After curing is completed, the PET film is separated to obtain a Class A fireproof simulated wood grain board;

[0059] The UV film pressing topcoat is mixed with modified nano-silica particles, and the mass ratio between the modified nano-silica and the UV film pressing topcoat is 1:50.

[0060] The preparation method of the modified nano-silica is as follows:

[0061] S101, ultrasonically dispersing 56 g of nano-silica with a particle size of 10 nm into 672 g of a 0.1 mol / L hydrochloric acid solution and soaking for 0.5 h, filtering, and washing the product with sufficient deionized water and calcining it at 400° C. for 2 h;

[0062] S102, dispersing the nano-silica treated in step S101 into a mixed solution of 5.6 g 1-butyl-3-methylimidazolium tetrafluoroborate, 2.8 g choline chloride, 5.6 g β-cyclodextrin, 336 g DMF and 280 g deionized water, heating to 50° C. for 1 h, filtering, and washing the product with sufficient deionized water and then drying it in vacuo at 20° C.;

[0063] S103, dispersing the nano-silica treated in step S102 into a mixed solution of 28 g of γ-glycidyloxypropyltrimethoxysilane and 674 g of toluene, heating to 70° C. and reacting for 6 h, filtering, washing the product with sufficient ethanol, and vacuum drying at 20° C. to obtain modified nano-silica.

[0064] Example 3

[0065] A method for preparing a Class A fireproof simulated wood grain board comprises the following steps:

[0066] S1. Make a master: Select natural wood, polish it by hand, and use a high-precision scanner to scan the polished natural wood at a resolution of 400 DPI to obtain a high-resolution texture image;

[0067] S2, making a nickel plate: placing the polished wood board in step S1 into a sealable container, applying 8 kg of thermosetting resin per square meter to the polished wood board surface, applying a pressure of 0.8 MPa, heating to 120° C., and heating and pressing for 8 hours. After the coating is evenly applied, the container is heated and pressurized. After complete solidification, the board and the resin are peeled off. Using electrostatic adsorption, nickel powder is evenly applied to the resin template to a thickness of 3 mm. After forming and curing, the nickel plate is peeled off to complete the production;

[0068] S3, making a mother film: coating UV glue on the nickel plate obtained in step S2, covering the surface of the UV glue with a PET film, and then separating the PET film from the nickel plate to obtain a PET film with a replica texture;

[0069] S4. Modify the image: Use Photoshop or other tools to perform color separation processing on the texture image obtained in step S1, repair surface defects, convert it into TIF format and transmit it to the digital printing control computer. The control computer converts the image into a digital signal and completes the image printing by controlling the switch of the inkjet system. The digital printing is 4 colors + white background, and the 4 colors are red, yellow, blue and black;

[0070] S5. Filling on the inorganic panel: Sand the surface of the inorganic panel with 240-grit sandpaper; then roll-coat the UV penetrating primer on the sanded inorganic panel surface. The coating amount of the UV penetrating primer is 35g / m 2 , UV curing energy is 250mJ / cm 2 , the curing degree is 85%; finally, a layer of UV adhesion putty and a layer of UV filling putty are rolled on the surface of UV penetrating primer, and the coating amount of UV adhesion putty is 20g / m 2 , UV curing energy is 400mJ / cm 2 , the curing degree is 90%; the coating amount of UV filling putty is 20g / m 2 , UV curing energy is 450mJ / cm 2 , the degree of curing is 100%;

[0071] S6. Making a base color on the inorganic panel: Roll-coat a layer of UV white primer on the inorganic panel treated in step S5. The coating amount of the UV white primer is 25 g / m 2 , UV curing energy is 200mJ / cm 2, the curing degree is 85%; then roll two layers of color topcoat on the UV white primer, and the coating amount of each layer of color topcoat is 25g / m 2 , UV curing energy is 350mJ / cm 2 , the degree of curing is 100%;

[0072] S7, digital printing: Use a digital printer to print the digital image modified in step S4 onto the inorganic panel processed in step S6, and then roll a layer of sanding UV primer on the printed image. The coating amount of the sanding UV primer is 40g / m 2 , UV curing energy is 500mJ / cm 2 , the degree of curing is 100%;

[0073] S8, making texture on the inorganic panel: first use 400 mesh sandpaper to sand the surface of the inorganic panel treated in step S7, and then roll-coat a layer of UV film pressing topcoat on the sanded inorganic panel. The coating amount of the UV film pressing topcoat is 300g / m 2 , press the PET film onto the UV film pressing topcoat surface and then cure it with a curing energy of 400mJ / cm 2 After curing is completed, the PET film is separated to obtain a Class A fireproof simulated wood grain board;

[0074] The UV film pressing topcoat is mixed with modified nano-silica particles, and the mass ratio between the modified nano-silica and the UV film pressing topcoat is 1:120.

[0075] The preparation method of the modified nano-silica is as follows:

[0076] S101, ultrasonically dispersing 56 g of nano-silica with a particle size of 30 nm into 1008 g of a 0.5 mol / L hydrochloric acid solution and soaking for 1 hour, filtering, and washing the product with sufficient deionized water and calcining it at 550° C. for 4 hours;

[0077] S102, dispersing the nano-silica treated in step S101 into a mixed solution of 2.8 g 1-butyl-3-methylimidazolium tetrafluoroborate, 8.4 g choline chloride, 11.2 g β-cyclodextrin, 224 g DMF and 196 g deionized water, heating the mixture to 65° C. for 3 h, filtering the mixture, and washing the product with sufficient deionized water and then drying it in vacuo at 40° C.;

[0078] S103, dispersing the nano-silica treated in step S102 into a mixed solution of 28 g of γ-glycidyloxypropyltrimethoxysilane and 674 g of toluene, heating to 110° C. and reacting for 12 h, filtering, and washing the product with sufficient ethanol and vacuum drying at 40° C. to obtain modified nano-silica.

[0079] The inorganic panel used in the above embodiment is specifically a perlite panel. The perlite panel is resistant to high temperatures and has good fire resistance, and can achieve A1 level fire resistance.

[0080] Comparative Example 1

[0081] The difference between Comparative Example 1 and Example 1 is that step 102 is omitted, and the remaining steps are exactly the same as those in Example 1.

[0082] Comparative Example 2

[0083] The difference between Comparative Example 2 and Example 1 is that step S103 is omitted, and the remaining steps are exactly the same as those in Example 1.

[0084] Comparative Example 3

[0085] The difference between Comparative Example 3 and Example 1 is that step S8 is omitted, thereby completely eliminating the addition of nano-silicon dioxide in the UV film pressing topcoat. The remaining steps are exactly the same as those in Example 1.

[0086] The surface roughness of the simulated wood grain boards prepared in Examples 1-3 and Comparative Examples 1-2 was tested, and the test results are shown in Table 1 below:

[0087] Table 1: Surface roughness test of simulated wood grain boards prepared in Examples 1-3 and Comparative Examples 1-3

[0088]

[0089]

[0090] It can be seen from the data in Table 1 above that after adding nano-silica in the present invention, the surface roughness of the film-pressed paint surface can be effectively reduced. At the same time, further modification of the nano-silica can further reduce the roughness of the silica surface.

[0091] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a Class A fireproof simulated wood grain board, characterized in that: The steps include: S1. Make a master: Select natural wood, polish it by hand, and use a high-precision scanner to scan the polished natural wood at a resolution of 400 DPI to obtain a high-resolution texture image; S2. Making a nickel plate: Place the polished wood board in step S1 into a sealable container, apply a thermosetting resin to the polished wood board surface, heat and pressurize the container after evenly applying the resin, and peel off the board from the resin after complete solidification. Use electrostatic adsorption to evenly apply nickel powder to the resin template to a thickness of 3 mm. After forming and solidification, peel off the nickel plate to complete the production; S3, making a mother film: coating UV glue on the nickel plate obtained in step S2, covering the surface of the UV glue with a PET film, and then separating the PET film from the nickel plate to obtain a PET film with a replica texture; S4. Modify the image: Use the Photoshop tool to perform color separation processing on the texture image obtained in step S1, repair surface defects, convert it into TIF format and transmit it to the digital printing control computer. The control computer converts the image into a digital signal and completes the image printing by controlling the switch of the inkjet system. The digital printing is 4 colors + white background, and the 4 colors are red, yellow, blue and black; S5. Filling on the inorganic panel: Sand the surface of the inorganic panel using 240-grit sandpaper; then roll-coat the sanded inorganic panel surface with UV penetrating primer and cure it; Finally, roll a layer of UV adhesion putty and a layer of UV filling putty on the surface of UV penetrating primer and then cure; S6. Making a base color on the inorganic panel: Roll-coating a layer of UV white primer on the inorganic panel treated in step S5 and then curing it; then roll-coating two layers of color topcoat on the UV white primer and then curing it; S7, digital printing: using a digital printer to print the digital image modified in step S4 onto the inorganic panel processed in step S6, and then rolling a layer of sanding UV primer on the printed image and curing it; S8. Creating a texture on the inorganic panel: First, sand the surface of the inorganic panel treated in step S7 using 400-grit sandpaper, then roll-coat a layer of UV film pressing topcoat on the sanded inorganic panel, press a PET film onto the surface of the UV film pressing topcoat, and after curing, separate the PET film to obtain a Class A fireproof simulated wood grain board; The UV film pressing topcoat is mixed with modified nano silicon dioxide particles, and the mass ratio between the modified nano silicon dioxide and the UV film pressing topcoat is 1:(50-120).

2. The method for preparing the Class A fireproof simulated wood grain board according to claim 1, characterized in that: In step S2, 5-8 kg of thermosetting resin is applied per square meter on the polished template surface, the pressure in the container is 0.6-0.8 MPa, the heating temperature is 80-120° C., and the heating and pressurizing time is 5-8 hours.

3. The method for preparing the Class A fireproof simulated wood grain board according to claim 1, characterized in that: The coating amount of the UV penetrating primer in step S5 is 20-35 g / m 2 , UV curing energy is 200-250mJ / cm 2 , the degree of curing is 70-85%; The coating amount of UV adhesive putty is 10-20g / m 2 , UV curing energy is 300-400mJ / cm 2 , the curing degree is 70-90%; the coating amount of UV filling putty is 10-20g / m 2 , UV curing energy is 400-450mJ / cm 2 , the degree of curing is 100%.

4. The method for preparing a Class A fireproof simulated wood grain board according to claim 1, characterized in that: The coating amount of the UV white primer in step S6 is 15-25 g / m 2 , UV curing energy is 150-200mJ / cm 2 , the curing degree is 80-85%; the coating amount of each color topcoat is 15-25g / m 2 , UV curing energy is 250-350mJ / cm 2 , the degree of curing is 90-100%.

5. The method for preparing the Class A fireproof simulated wood grain board according to claim 1, characterized in that: The coating amount of the sanding UV primer in step S7 is 30-40 g / m 2 , UV curing energy is 350-500mJ / cm 2 , the degree of curing is 100%.

6. The method for preparing the Class A fireproof simulated wood grain board according to claim 1, characterized in that: The coating amount of the UV film pressing topcoat in step S8 is 200-300g / m 2 , UV curing energy is 300-400mJ / cm 2 .

7. The method for preparing a Class A fireproof simulated wood grain board according to claim 1, characterized in that: The preparation method of the modified nano-silica is as follows: S101, ultrasonically dispersing nano-silica with a particle size of 10-30 nm into a 0.1-0.5 mol / L hydrochloric acid solution and soaking for 0.5-1 h, filtering, and washing the product with sufficient deionized water and calcining at 400-550° C. for 2-4 h; S102, dispersing the nano-silica treated in step S101 into a mixed solution of 1-butyl-3-methylimidazolium tetrafluoroborate, choline chloride, β-cyclodextrin, DMF and deionized water, heating to 50-65° C. for reaction for 1-3 hours, filtering, and washing the product with sufficient deionized water and then vacuum drying at 20-40° C.; S103, dispersing the nano-silica treated in step S102 into a mixed solution of γ-glycidyloxypropyltrimethoxysilane and toluene, heating to 70-110° C. and reacting for 6-12 hours, filtering, washing the product with sufficient ethanol, and vacuum drying at 20-40° C. to obtain modified nano-silica.

8. The method for preparing the Class A fireproof simulated wood grain board according to claim 7, characterized in that: In step S101, the mass ratio of nano-silicon dioxide to hydrochloric acid solution is 1:(12-18).

9. The method for preparing a Class A fireproof simulated wood grain board according to claim 7, characterized in that: The mass ratio of 1-butyl-3-methylimidazolium tetrafluoroborate, choline chloride, β-cyclodextrin, DMF and deionized water in step S102 to the nano-silica used in step S101 is 1:(0.5-3):(1-4):(60-80):(50-70):(10-20).

10. The method for preparing a Class A fireproof simulated wood grain board according to claim 7, characterized in that: The mass ratio of γ-glycidyloxypropyltrimethoxysilane and toluene in step S103 to the nano-silica used in step S101 is 1:24:2.

Images