Multifunctional decorative paper and preparation method thereof

Abstract

The present invention is applicable to the technical field of decorative paper and provides a multifunctional decorative paper and a preparation method thereof. The raw materials of the multifunctional decorative paper include base paper and an impregnating material. The impregnating material includes the following raw materials: vinyl ester resin, water-based polyurethane, filler, flame retardant, modified lignin, heat stabilizer, modified polyvinyl alcohol, anti-ultraviolet agent, and antibacterial agent. The multifunctional decorative paper provided by the present invention is impregnated with the impregnating material, and modified lignin is added to the impregnating material to improve the hydrophobicity of the material and form a waterproof film layer on the surface of the decorative paper. By adding modified polyvinyl alcohol, the multifunctional decorative paper has good hydrophobic ability and forms a cross-linked dense mesh hydrophobic film with good waterproof effect, which prevents the decorative paper from water ingress and moisture. By adding fillers, the wear resistance and mechanical properties are improved. By adding flame retardants, anti-ultraviolet agents, and antibacterial agents, the decorative paper has flame retardant, sun protection, anti-aging, and antibacterial functions.

Description

Technical Field

[0001] The present invention belongs to the technical field of decorative paper, and in particular relates to a multifunctional decorative paper and a preparation method thereof. Background Art

[0002] Decorative paper is an essential raw material in many building materials products, such as low-pressure and high-pressure boards used in furniture and cabinets, as well as fireproof boards and flooring. In the product structure, decorative paper is placed under the surface paper, mainly providing decorative patterns and covering functions;

[0003] Decorative paper is directly exposed to the outside world during use. Existing decorative paper has less than ideal moisture and water resistance. Accidental spills, water ingress, and moisture can easily cause the decorative paper to mold and turn yellow over time, affecting its appearance and service life. Summary of the Invention

[0004] The present invention provides a multifunctional decorative paper, aiming to solve the above problems.

[0005] The present invention is achieved as follows: a multifunctional decorative paper, the raw materials of which include base paper and an impregnating material, wherein the impregnating material includes the following raw materials in parts by weight: 70-90 parts of vinyl ester resin, 30-50 parts of water-based polyurethane, 15-25 parts of filler, 1-4 parts of flame retardant, 6-10 parts of modified lignin, 1-3 parts of heat stabilizer, 6-10 parts of modified polyvinyl alcohol, 2-4 parts of anti-ultraviolet agent, and 2-5 parts of antibacterial agent.

[0006] Preferably, the impregnating material comprises the following raw materials in parts by weight: 75-85 parts of vinyl ester resin, 35-45 parts of waterborne polyurethane, 18-22 parts of filler, 1.5-3.5 parts of flame retardant, 7-9 parts of modified lignin, 1.5-2.5 parts of heat stabilizer, 7-9 parts of modified polyvinyl alcohol, 2.5-3.5 parts of anti-ultraviolet agent, and 3-4 parts of antibacterial agent.

[0007] Preferably, the impregnating material comprises the following raw materials in parts by weight: 80 parts of vinyl ester resin, 40 parts of waterborne polyurethane, 20 parts of filler, 2.5 parts of flame retardant, 8 parts of modified lignin, 2 parts of heat stabilizer, 8 parts of modified polyvinyl alcohol, 3 parts of anti-ultraviolet agent, and 3.5 parts of antibacterial agent.

[0008] Preferably, the filler comprises modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 2-4:1-3:1:1-2.

[0009] Preferably, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.05-0.1 mol / L, the concentration of the nano-boron nitride being 1-2 mg / mL, ultrasonically dispersing for 30-50 minutes, heating to 80-90°C, filtering and washing to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid in a mass ratio of 2-5:1, heating to 60-70°C for reaction for 30-50 minutes, adding stearic acid, and irradiating with stirring for 20-30 minutes. After washing the product, drying at 100-120°C, and grinding with a ball mill to obtain modified boron nitride; wherein the absorbed dose rate of the irradiation treatment is 80-120 Gy / min, and by grafting stearic acid molecular chains on the surface of the boron nitride, agglomeration is reduced. At the same time, the irradiation treatment improves its dispersibility and chemical activity. By adding the modified boron nitride, the wear resistance and mechanical properties of the material are improved.

[0010] Preferably, the preparation method of the modified gas silica is as follows: immersing the fumed silica in a hydrochloric acid solution with a concentration of 28-35%, heating to 40-50°C, soaking for 1-2 hours, adjusting the pH value to 6-8, filtering and drying at 50-60°C to obtain pretreated gas silica, placing the pretreated gas silica under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting in a fluidized bed to obtain modified gas silica; the modified gas silica can be uniformly dispersed in the system, improving the bonding ability of the fumed silica with the system, forming a network structure, and improving the stability, mechanical properties and density of the impregnation layer.

[0011] Preferably, the flame retardant is made of a halogen-free organic phosphorus-nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol, and the mass ratio of the three is 1-3:1:1; the antibacterial agent includes chitosan and silver nitrate, and the mass ratio of the two is 2-3:1;

[0012] Preferably, the preparation method of the anti-ultraviolet agent is as follows: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 30-50 minutes, then adding magnesium sulfate, stirring and reacting for 20-40 minutes, and finally adding nano-titanium dioxide, mixing and grinding the mixture in a ball mill to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 25-35:1:1-3:6-10; montmorillonite has unique layered nanostructure characteristics and a large specific surface area. Montmorillonite is treated with cetyltrimethylammonium bromide to cause a cation exchange reaction, so that organic groups are covered on the surface of the montmorillonite or inserted between its layers, thereby increasing the interlayer spacing and changing it from hydrophilic to lipophilic. Then, by adding magnesium sulfate, the montmorillonite is exfoliated and dispersed thinner, and the nano-titanium dioxide is loaded on the two-dimensional nano-montmorillonite flakes and fully and evenly dispersed in the system, which can improve the anti-ultraviolet and aging resistance of the decorative paper.

[0013] Preferably, the preparation method of the modified lignin is as follows: 15-20 parts of lignin are weighed by weight, placed in 30-40 parts of methanol, heated to 50-60°C, and after 10-20 minutes, 1-3 parts of trimethylsilyl chloride, 1-2 parts of soy protein isolate and 2-4 parts of polydimethylsiloxane are added, reacted for 30-50 minutes, adjusted to pH 4-6, filtered and dried to obtain modified lignin; trimethylsilyl chloride is added to silane-modify the lignin to improve its activity, and then polydimethylsiloxane is added to improve the hydrophobicity of the lignin, and the film-forming property of the lignin is improved by adding soy protein isolate to form a waterproof film layer.

[0014] Preferably, the preparation method of the modified polyvinyl alcohol is as follows: 10-20 parts of polyvinyl alcohol are weighed by weight and added to 60-80 parts of water at 80-90°C, stirred until completely dissolved, then 2-4 parts of malondialdehyde and 1-3 parts of silica sol are added, stirring is continued for 15-20 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 50-60°C for 30-40 minutes to obtain modified polyvinyl alcohol; by adding malondialdehyde and silica sol, the hydroxyl groups on the surface of the polyvinyl alcohol are reduced and the hydrophobic ability of the polyvinyl alcohol is improved, and then vinyltrimethoxysilane is added, and the hydrophobic groups interact with the hydroxyl groups in the polyvinyl alcohol to form a cross-linked dense network hydrophobic film, thereby improving the hydrophobicity of the impregnation layer.

[0015] The present invention also provides a method for preparing the multifunctional decorative paper, comprising the following steps:

[0016] Printing and drying the base paper to obtain printed decorative paper;

[0017] Weigh the raw materials of the impregnation material according to the ratio, stir and mix them evenly to obtain the impregnation material;

[0018] Heat the impregnation material to 100-120℃, place the printed decorative paper in the impregnation material for the first impregnation, and then dry it at 60-80℃;

[0019] The paper is put into the impregnation material for a second impregnation, and then dried at 80-100° C. to obtain a multifunctional decorative paper.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] The multifunctional decorative paper provided by the present invention is treated by impregnation with an impregnating material, wherein modified lignin is added to the impregnating material to improve the hydrophobic properties of the material and form a waterproof film layer on the surface of the decorative paper. By adding modified polyvinyl alcohol, the paper has good hydrophobic ability, forming a cross-linked dense network hydrophobic film with good waterproof effect, preventing the decorative paper from water ingress and moisture. By adding fillers, the wear resistance and mechanical properties are improved. By adding flame retardants, anti-ultraviolet agents, and antibacterial agents, the decorative paper has flame retardant, sun protection, anti-aging, and antibacterial functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart for preparing a multifunctional decorative paper provided by the present invention. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] Example 1

[0026] The embodiment of the present invention provides a multifunctional decorative paper, such as Figure 1 As shown, the preparation method is as follows: base paper is printed and dried to obtain printed decorative paper; the following raw materials are weighed in parts by weight according to a proportion: 70 parts of vinyl ester resin, 30 parts of waterborne polyurethane, 15 parts of filler, 1 part of flame retardant, 6 parts of modified lignin, 1 part of heat stabilizer, 6 parts of modified polyvinyl alcohol, 2 parts of anti-ultraviolet agent, and 2 parts of antibacterial agent, and stirred and mixed uniformly to obtain an impregnation material; the impregnation material is heated to 100°C, and the printed decorative paper is placed in the impregnation material for a first impregnation, followed by drying at 60°C; the printed decorative paper is placed in the impregnation material again for a second impregnation, and then dried at 80°C to obtain a multifunctional decorative paper.

[0027] The filler includes modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 2:1:1:1.

[0028] Specifically, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.05.1 mol / L, wherein the concentration of the nano-boron nitride is 1 mg / mL, ultrasonically dispersing the solution for 30 minutes, heating the solution to 80°C, filtering, and washing the solution to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid at a mass ratio of 2:1, heating the solution to 60°C for reaction for 30 minutes, adding stearic acid, and irradiating the solution with stirring for 20 minutes. The product is washed and dried at 100°C, and then ground in a ball mill to obtain modified boron nitride.

[0029] In a specific implementation, the preparation method of the modified gas silicon is as follows: immersing the gas-phase silica in a hydrochloric acid solution with a concentration of 28%, heating it to 40°C, soaking it for 1 hour, adjusting the pH value to 6, filtering it and drying it at 50°C to obtain pretreated gas silicon, placing the pretreated gas silicon under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting it in a fluidized bed to obtain modified gas silicon.

[0030] In this embodiment, the flame retardant is made of a halogen-free organic phosphorus and nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol, and the mass ratio of the three is 1:1:1; the antibacterial agent includes chitosan and silver nitrate, and the mass ratio of the two is 2:1;

[0031] Preferably, the preparation method of the anti-ultraviolet agent is: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 30 minutes, then adding magnesium sulfate, stirring and reacting for 20 minutes, and finally adding nano-titanium dioxide, mixing and then putting the mixture into a ball mill for grinding to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 25:1:1:6.

[0032] Furthermore, the preparation method of the modified lignin is as follows: 15 parts of lignin are weighed by weight, put into 30 parts of methanol, heated to 50°C, and after 10 minutes, 1 part of trimethylchlorosilane, 1 part of soy protein isolate and 2 parts of polydimethylsiloxane are added, reacted for 30 minutes, adjusted to pH 4, filtered and dried to obtain modified lignin.

[0033] Furthermore, the preparation method of the modified polyvinyl alcohol is as follows: 10 parts of polyvinyl alcohol are weighed by weight and added to 60 parts of 80°C water, stirred until completely dissolved, then 2 parts of malondialdehyde and 1 part of silica sol are added, and stirring is continued for 15 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 50°C for 30 minutes to obtain modified polyvinyl alcohol.

[0034] Example 2

[0035] The embodiment of the present invention provides a multifunctional decorative paper, such as Figure 1 As shown, the preparation method is as follows: base paper is printed and dried to obtain printed decorative paper; the following raw materials are weighed in parts by weight according to a ratio: 75 parts of vinyl ester resin, 35 parts of waterborne polyurethane, 18 parts of filler, 1.5 parts of flame retardant, 7 parts of modified lignin, 1.5 parts of heat stabilizer, 7 parts of modified polyvinyl alcohol, 2.5 parts of anti-ultraviolet agent, and 3 parts of antibacterial agent, and stirred and mixed uniformly to obtain an impregnation material; the impregnation material is heated to 100°C, and the printed decorative paper is placed in the impregnation material for a first impregnation, followed by drying at 60°C; the printed decorative paper is placed in the impregnation material again for a second impregnation, and then dried at 80°C to obtain a multifunctional decorative paper.

[0036] The filler includes modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 2:1:1:1.

[0037] Specifically, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.05.1 mol / L, wherein the concentration of the nano-boron nitride is 1 mg / mL, ultrasonically dispersing the solution for 30 minutes, heating the solution to 80°C, filtering, and washing the solution to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid at a mass ratio of 2:1, heating the solution to 60°C for reaction for 30 minutes, adding stearic acid, and irradiating the solution with stirring for 20 minutes. The product is washed and dried at 100°C, and then ground in a ball mill to obtain modified boron nitride.

[0038] In a specific implementation, the preparation method of the modified gas silicon is as follows: immersing the gas-phase silica in a hydrochloric acid solution with a concentration of 28%, heating it to 40°C, soaking it for 1 hour, adjusting the pH value to 6, filtering it and drying it at 50°C to obtain pretreated gas silicon, placing the pretreated gas silicon under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting it in a fluidized bed to obtain modified gas silicon.

[0039] In this embodiment, the flame retardant is made of a halogen-free organic phosphorus and nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol, and the mass ratio of the three is 1:1:1; the antibacterial agent includes chitosan and silver nitrate, and the mass ratio of the two is 2:1;

[0040] Preferably, the preparation method of the anti-ultraviolet agent is: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 30 minutes, then adding magnesium sulfate, stirring and reacting for 20 minutes, and finally adding nano-titanium dioxide, mixing and then putting the mixture into a ball mill for grinding to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 25:1:1:6.

[0041] Furthermore, the preparation method of the modified lignin is as follows: 15 parts of lignin are weighed by weight, put into 30 parts of methanol, heated to 50°C, and after 10 minutes, 1 part of trimethylchlorosilane, 1 part of soy protein isolate and 2 parts of polydimethylsiloxane are added, reacted for 30 minutes, adjusted to pH 4, filtered and dried to obtain modified lignin.

[0042] Furthermore, the preparation method of the modified polyvinyl alcohol is as follows: 10 parts of polyvinyl alcohol are weighed by weight and added to 60 parts of 80°C water, stirred until completely dissolved, then 2 parts of malondialdehyde and 1 part of silica sol are added, and stirring is continued for 15 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 50°C for 30 minutes to obtain modified polyvinyl alcohol.

[0043] Example 3

[0044] The embodiment of the present invention provides a multifunctional decorative paper, such as Figure 1 As shown, the preparation method is as follows: base paper is printed and dried to obtain printed decorative paper; the following raw materials are weighed in parts by weight according to a proportion: 80 parts of vinyl ester resin, 40 parts of waterborne polyurethane, 20 parts of filler, 2.5 parts of flame retardant, 8 parts of modified lignin, 2 parts of heat stabilizer, 8 parts of modified polyvinyl alcohol, 3 parts of anti-ultraviolet agent, and 3.5 parts of antibacterial agent, and stirred and mixed uniformly to obtain an impregnation material; the impregnation material is heated to 110° C., the printed decorative paper is placed in the impregnation material for a first impregnation, and then dried at 70° C.; the printed decorative paper is placed in the impregnation material again for a second impregnation, and then dried at 90° C. to obtain a multifunctional decorative paper.

[0045] The filler includes modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 3:2:1:1.5.

[0046] Specifically, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.08 mol / L, wherein the concentration of the nano-boron nitride is 1.5 mg / mL, ultrasonically dispersing the solution for 40 minutes, heating the solution to 85°C, filtering, and washing to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid at a mass ratio of 3.5:1, heating the solution to 65°C for reaction for 40 minutes, adding stearic acid, and irradiating the solution with stirring for 25 minutes. The product is washed and dried at 110°C, and then ground in a ball mill to obtain modified boron nitride.

[0047] In a specific implementation, the preparation method of the modified gas silicon is as follows: immersing the fumed silica in a 32% hydrochloric acid solution, heating it to 45°C, soaking it for 1.5 hours, adjusting the pH value to 7, filtering it, and drying it at 55°C to obtain pretreated gas silicon, placing the pretreated gas silicon under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting it in a fluidized bed to obtain modified gas silicon.

[0048] In this embodiment, the flame retardant is made of a halogen-free organic phosphorus-nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol in a mass ratio of 2:1:1; and the antibacterial agent includes chitosan and silver nitrate in a mass ratio of 2.5:1.

[0049] Preferably, the preparation method of the anti-ultraviolet agent is: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 40 minutes, then adding magnesium sulfate, stirring and reacting for 30 minutes, and finally adding nano-titanium dioxide, mixing and then putting the mixture into a ball mill for grinding to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 30:1:2:8.

[0050] Furthermore, the preparation method of the modified lignin is as follows: 17 parts of lignin are weighed by weight, put into 35 parts of methanol, heated to 55°C, and after 15 minutes, 2 parts of trimethylchlorosilane, 1.5 parts of soy protein isolate and 3 parts of polydimethylsiloxane are added, reacted for 40 minutes, adjusted to pH 5, filtered and dried to obtain modified lignin.

[0051] Furthermore, the preparation method of the modified polyvinyl alcohol is as follows: 15 parts of polyvinyl alcohol are weighed by weight and added to 70 parts of 85°C water, stirred until completely dissolved, then 3 parts of malondialdehyde and 2 parts of silica sol are added, and stirring is continued for 18 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 55°C for 35 minutes to obtain modified polyvinyl alcohol.

[0052] Example 4

[0053] The embodiment of the present invention provides a multifunctional decorative paper, such as Figure 1 As shown, the preparation method is as follows: base paper is printed and dried to obtain printed decorative paper; the following raw materials are weighed in parts by weight according to a ratio: 85 parts of vinyl ester resin, 45 parts of waterborne polyurethane, 22 parts of filler, 3.5 parts of flame retardant, 9 parts of modified lignin, 2.5 parts of heat stabilizer, 9 parts of modified polyvinyl alcohol, 3.5 parts of anti-ultraviolet agent, and 4 parts of antibacterial agent, and stirred and mixed to obtain an impregnation material; the impregnation material is heated to 120°C, and the printed decorative paper is placed in the impregnation material for a first impregnation, followed by drying at 80°C; the printed decorative paper is placed in the impregnation material again for a second impregnation, and then dried at 100°C to obtain a multifunctional decorative paper.

[0054] The filler includes modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 4:3:1:2.

[0055] Specifically, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.0.1 mol / L, the concentration of the nano-boron nitride is 2 mg / mL, and then heating to 90°C after ultrasonic dispersion for 50 minutes, filtering and washing to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid at a mass ratio of 5:1, heating to 70°C for reaction for 50 minutes, then adding stearic acid, and irradiating for 30 minutes while stirring, washing the product and drying it at 120°C, and grinding it with a ball mill to obtain modified boron nitride.

[0056] In a specific implementation, the preparation method of the modified gas silicon is as follows: immersing the fumed silica in a 35% hydrochloric acid solution, heating it to 50°C, soaking it for 2 hours, adjusting the pH value to 8, filtering it, and drying it at 60°C to obtain pretreated gas silicon, placing the pretreated gas silicon under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting it in a fluidized bed to obtain modified gas silicon.

[0057] In this embodiment, the flame retardant is made of a halogen-free organic phosphorus and nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol, and the mass ratio of the three is 3:1:1; the antibacterial agent includes chitosan and silver nitrate, and the mass ratio of the two is 3:1;

[0058] Preferably, the preparation method of the anti-ultraviolet agent is: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 50 minutes, then adding magnesium sulfate, stirring and reacting for 40 minutes, and finally adding nano-titanium dioxide, mixing and then putting the mixture into a ball mill for grinding to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 35:1:3:10.

[0059] Furthermore, the preparation method of the modified lignin is as follows: 20 parts of lignin are weighed by weight, put into 40 parts of methanol, heated to 60°C, and after 20 minutes, 3 parts of trimethylchlorosilane, 2 parts of soy protein isolate and 4 parts of polydimethylsiloxane are added, reacted for 50 minutes, adjusted to pH 6, filtered and dried to obtain modified lignin.

[0060] Furthermore, the preparation method of the modified polyvinyl alcohol is as follows: 20 parts of polyvinyl alcohol are weighed by weight and added to 80 parts of 90°C water, stirred until completely dissolved, then 4 parts of malondialdehyde and 3 parts of silica sol are added, and stirring is continued for 20 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 60°C for 40 minutes to obtain modified polyvinyl alcohol.

[0061] Example 5

[0062] The embodiment of the present invention provides a multifunctional decorative paper, such as Figure 1 As shown, the preparation method is as follows: base paper is printed and dried to obtain printed decorative paper; the following raw materials are weighed in parts by weight according to a proportion: 90 parts of vinyl ester resin, 50 parts of waterborne polyurethane, 25 parts of filler, 4 parts of flame retardant, 10 parts of modified lignin, 3 parts of heat stabilizer, 10 parts of modified polyvinyl alcohol, 4 parts of anti-ultraviolet agent, and 5 parts of antibacterial agent, and stirred and mixed uniformly to obtain an impregnation material; the impregnation material is heated to 120°C, and the printed decorative paper is placed in the impregnation material for a first impregnation, followed by drying at 80°C; the printed decorative paper is placed in the impregnation material again for a second impregnation, and then dried at 100°C to obtain a multifunctional decorative paper.

[0063] The filler includes modified boron nitride, modified silica, nano-alumina and light calcium carbonate, and the mass ratio thereof is 4:3:1:2.

[0064] Specifically, the preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.0.1 mol / L, the concentration of the nano-boron nitride is 2 mg / mL, and then heating to 90°C after ultrasonic dispersion for 50 minutes, filtering and washing to obtain pretreated nano-boron nitride, mixing the pretreated nano-boron nitride with stearic acid at a mass ratio of 5:1, heating to 70°C for reaction for 50 minutes, then adding stearic acid, and irradiating for 30 minutes while stirring, washing the product and drying it at 120°C, and grinding it with a ball mill to obtain modified boron nitride.

[0065] In a specific implementation, the preparation method of the modified gas silicon is as follows: immersing the fumed silica in a 35% hydrochloric acid solution, heating it to 50°C, soaking it for 2 hours, adjusting the pH value to 8, filtering it, and drying it at 60°C to obtain pretreated gas silicon, placing the pretreated gas silicon under tetramethyltetravinylcyclotetrasiloxane vapor, contacting and reacting it in a fluidized bed to obtain modified gas silicon.

[0066] In this embodiment, the flame retardant is made of a halogen-free organic phosphorus and nitrogen compound and montmorillonite mixed in equal proportions; the heat stabilizer includes aluminum hydroxide, magnesium hydroxide, and pentaerythritol, and the mass ratio of the three is 3:1:1; the antibacterial agent includes chitosan and silver nitrate, and the mass ratio of the two is 3:1;

[0067] Preferably, the preparation method of the anti-ultraviolet agent is: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 50 minutes, then adding magnesium sulfate, stirring and reacting for 40 minutes, and finally adding nano-titanium dioxide, mixing and then putting the mixture into a ball mill for grinding to obtain the anti-ultraviolet agent, wherein the mass ratio of nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 35:1:3:10.

[0068] Furthermore, the preparation method of the modified lignin is as follows: 20 parts of lignin are weighed by weight, put into 40 parts of methanol, heated to 60°C, and after 20 minutes, 3 parts of trimethylchlorosilane, 2 parts of soy protein isolate and 4 parts of polydimethylsiloxane are added, reacted for 50 minutes, adjusted to pH 6, filtered and dried to obtain modified lignin.

[0069] Furthermore, the preparation method of the modified polyvinyl alcohol is as follows: 20 parts of polyvinyl alcohol are weighed by weight and added to 80 parts of 90°C water, stirred until completely dissolved, then 4 parts of malondialdehyde and 3 parts of silica sol are added, and stirring is continued for 20 minutes, and finally vinyltrimethoxysilane is added, and the reaction is carried out at 60°C for 40 minutes to obtain modified polyvinyl alcohol.

[0070] Comparative Example 1

[0071] Compared with Example 3, the modified lignin was replaced by ordinary lignin.

[0072] Comparative Example 2

[0073] Compared with Example 3, the modified polyvinyl alcohol was replaced by ordinary polyvinyl alcohol.

[0074] Comparative Example 3

[0075] Compared with Example 3, the modified lignin was replaced by ordinary lignin and the modified polyvinyl alcohol was replaced by ordinary polyvinyl alcohol.

[0076] Comparative Example 4

[0077] Compared with Example 3, modified boron nitride is not contained;

[0078] Comparative Example 5

[0079] Compared with Example 3, modified gas silicon is not contained;

[0080] Comparative Example 6

[0081] A commercially available decorative paper.

[0082] Performance Testing

[0083] Test 1

[0084] The following tests were performed on the decorative papers of Examples 1-5, Comparative Examples 1-3, and Comparative Example 6:

[0085] Surface contact angle: It is expressed as the static contact angle of the film layer to water. It is measured using a JC2000C1 contact angle meter. The water droplet size is 5μL. The average value is taken after three measurements. The test results are shown in Table 1:

[0086] Table 1

[0087] Surface contact angle (°) Example 1 175.3 Example 2 175.5 Example 3 175.8 Example 4 175.6 Example 5 175.3 Comparative Example 1 135.5 Comparative Example 2 134.8 Comparative Example 3 106.7 Comparative Example 6 104.3

[0088] From the above results, it can be seen that the decorative paper of the present invention has a high contact angle and good hydrophobicity, which effectively prevents water from penetrating into the printed decorative paper. By adding modified lignin and modified polyvinyl alcohol, they have a synergistic effect, further improving the hydrophobicity of the decorative paper.

[0089] Test 2

[0090] The following tests were performed on the decorative papers of Examples 1-5 and Comparative Examples 4-6:

[0091] Longitudinal wet tensile strength: tested in accordance with GB / T465.2-2008, with the immersion time being 5s.

[0092] Longitudinal dry tensile strength: tested in accordance with the provisions of GB / T-12914-2008.

[0093] The test results are shown in Table 2 below:

[0094] Table 2

[0095] Longitudinal dry tensile strength (N / 15mm) Longitudinal wet tensile strength (N / 15mm) Example 1 30.2 29.3 Example 2 30.5 29.6 Example 3 30.6 29.8 Example 4 30.4 29.7 Example 5 30.3 29.5 Comparative Example 4 22.1 21.4 Comparative Example 5 23.5 22.3 Comparative Example 6 16.8 16.5

[0096] From the above results, it can be seen that the decorative paper prepared by the present invention has improved mechanical properties by adding modified boron nitride and modified silica as fillers.

[0097] It should be noted that, for the sake of simplicity, the aforementioned embodiments are described as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0098] In the embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0099] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. A multifunctional decorative paper, the raw materials of which include base paper and impregnating material, characterized in that: The impregnating material comprises the following raw materials in parts by weight: 70-90 parts of vinyl ester resin, 30-50 parts of waterborne polyurethane, 15-25 parts of filler, 1-4 parts of flame retardant, 6-10 parts of modified lignin, 1-3 parts of heat stabilizer, 6-10 parts of modified polyvinyl alcohol, 2-4 parts of anti-ultraviolet agent, and 2-5 parts of antibacterial agent; The filler comprises modified boron nitride, modified silica, nano-alumina and light calcium carbonate in a mass ratio of 2-4:1-3:1:1-2. The preparation method of the modified boron nitride is as follows: adding nano-boron nitride to a formic acid solution with a concentration of 0.05-0.1 mol / L, wherein the concentration of the nano-boron nitride is 1-2 mg / mL; performing ultrasonic dispersion for 30-50 minutes, heating to 80-90° C., filtering and washing to obtain pretreated nano-boron nitride; mixing the pretreated nano-boron nitride with stearic acid in a mass ratio of 2-5:1; heating to 60-70° C. for reaction for 30-50 minutes; then adding stearic acid; and irradiating the mixture while stirring for 20-30 minutes. After washing the product, drying it at 100-120° C., and grinding it with a ball mill to obtain the modified boron nitride.

2. The multifunctional decorative paper according to claim 1, characterized in that: The impregnating material includes the following raw materials in parts by weight: 75-85 parts of vinyl ester resin, 35-45 parts of waterborne polyurethane, 18-22 parts of filler, 1.5-3.5 parts of flame retardant, 7-9 parts of modified lignin, 1.5-2.5 parts of heat stabilizer, 7-9 parts of modified polyvinyl alcohol, 2.5-3.5 parts of anti-ultraviolet agent, and 3-4 parts of antibacterial agent.

3. The multifunctional decorative paper according to claim 2, characterized in that: The impregnating material includes the following raw materials in parts by weight: 80 parts of vinyl ester resin, 40 parts of waterborne polyurethane, 20 parts of filler, 2.5 parts of flame retardant, 8 parts of modified lignin, 2 parts of heat stabilizer, 8 parts of modified polyvinyl alcohol, 3 parts of anti-ultraviolet agent, and 3.5 parts of antibacterial agent.

4. The multifunctional decorative paper according to claim 1, wherein: The modified fumed silica is prepared as follows: immersing fumed silica in a hydrochloric acid solution with a concentration of 28-35%, heating the solution to 40-50° C., soaking the solution for 1-2 hours, adjusting the pH value to 6-8, filtering the solution, and drying the solution at 50-60° C. to obtain pretreated fumed silica; placing the pretreated fumed silica under tetramethyltetravinylcyclotetrasiloxane vapor, and subjecting the pretreated fumed silica to contact and react in a fluidized bed to obtain modified fumed silica.

5. The multifunctional decorative paper according to claim 1, wherein: The preparation method of the anti-ultraviolet agent comprises the following steps: adding cetyltrimethylammonium bromide to nano-montmorillonite, stirring and reacting for 30-50 minutes, then adding magnesium sulfate, stirring and reacting for 20-40 minutes, and finally adding nano-titanium dioxide, mixing, and grinding the mixture in a ball mill to obtain the anti-ultraviolet agent, wherein the mass ratio of the nano-montmorillonite, cetyltrimethylammonium bromide, magnesium sulfate, and nano-titanium dioxide is 25-35:1:1-3:6-10.

6. The multifunctional decorative paper according to claim 1, wherein: The modified lignin is prepared as follows: 15-20 parts of lignin are weighed by weight, placed in 30-40 parts of methanol, heated to 50-60°C for 10-20 minutes, then 1-3 parts of trimethylchlorosilane, 1-2 parts of soy protein isolate, and 2-4 parts of polydimethylsiloxane are added, reacted for 30-50 minutes, adjusted to pH 4-6, filtered, and dried to obtain the modified lignin.

7. The multifunctional decorative paper according to claim 1, wherein: The modified polyvinyl alcohol is prepared as follows: 10-20 parts of polyvinyl alcohol are weighed by weight and added to 60-80 parts of water at 80-90° C., stirred until completely dissolved, then 2-4 parts of malondialdehyde and 1-3 parts of silica sol are added, stirring is continued for 15-20 minutes, and finally vinyltrimethoxysilane is added, and the mixture is reacted at 50-60° C. for 30-40 minutes to obtain the modified polyvinyl alcohol.

8. The method for preparing the multifunctional decorative paper according to any one of claims 1 to 7, characterized in that: The steps include: Printing and drying the base paper to obtain printed decorative paper; Weigh the raw materials of the impregnation material according to the ratio, stir and mix them evenly to obtain the impregnation material; Heat the impregnation material to 100-120℃, place the printed decorative paper in the impregnation material for the first impregnation, and then dry it at 60-80℃; The paper is put into the impregnation material for a second impregnation, and then dried at 80-100° C. to obtain a multifunctional decorative paper.

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