High-temperature resistant transparent decorative printing paper preparation process

Abstract

This invention relates to the field of decorative paper preparation technology, and provides a process for preparing high-temperature resistant transparent decorative printing paper, comprising the following steps: S1. Mixing the following raw materials in the following weight percentages: 20%-40% polyimide resin, 5%-15% glass fiber, 1%-5% silane coupling agent, 0.5%-2% antioxidant, 5%-20% filler, 20%-30% solvent, and 1%-5% other additives; S2. Stirring the above materials evenly to form a mixed slurry; S3. Coating and drying the mixed slurry to form a transparent decorative layer; S4. Hot-pressing to improve its adhesion and high-temperature resistance; S5. Cooling to room temperature and then peeling off to obtain independent high-temperature resistant transparent decorative printing paper. By using special materials such as polyimide resin and glass fiber, combined with specific silane coupling agents and antioxidants, excellent high-temperature resistance is achieved, significantly improving the durability and reliability of the product, extending its service life, reducing the frequency of maintenance and replacement, and thus reducing long-term operating costs.

Description

Technical Field

[0001] This invention relates to the field of decorative paper preparation technology, specifically to the preparation process of high-temperature resistant transparent decorative printing paper. Background Technology

[0002] Decorative printing paper is an important material used to enhance the appearance and texture of products. It is widely used in various commodity packaging, interior decoration, furniture surfaces and other fields. Through exquisite patterns and rich colors, it adds artistry and commercial value to products. With the development of industrial technology, decorative printing paper not only pursues aesthetics, but also needs to have certain physical and chemical properties, such as high temperature resistance, wear resistance and moisture resistance.

[0003] Traditional decorative printing paper may soften, discolor, or deform under high temperature conditions, affecting the appearance and lifespan of the product. To overcome these problems, researchers have been searching for decorative materials and their preparation processes that can withstand high temperatures and maintain transparency. However, existing technologies and materials often struggle to achieve an ideal balance between high-temperature resistance, transparency, and processing costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a process for preparing high-temperature resistant transparent decorative printing paper, which solves the problem of poor high-temperature resistance of decorative printing paper in existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a process for preparing high-temperature resistant transparent decorative printing paper, comprising the following steps;

[0006] S1. The following raw materials are formulated in the following weight percentages: polyimide resin 20%-40%, glass fiber 5%-15%, silane coupling agent 1%-5%, antioxidant 0.5%-2%, filler 5%-20%, solvent 20%-30%, and other additives 1%-5%;

[0007] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry;

[0008] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0009] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0010] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0011] Preferably, the polyimide resin is selected from one or more of pyromellitic polyimide and biphenyl polyimide.

[0012] Preferably, the silane coupling agent is selected from one or more of vinyltriethoxysilane and methacryloxypropyltrimethoxysilane.

[0013] Preferably, the antioxidant is selected from one or more of 2,6-di-tert-butyl-p-cresol and triethyl phosphite.

[0014] Preferably, the filler is selected from one or more of silicon dioxide, aluminum hydroxide, and calcium carbonate.

[0015] Preferably, the solvent is selected from one or more of toluene, butanone, acetone, and ethyl acetate.

[0016] Preferably, the other additives include dispersants, defoamers, leveling agents, and antisettling agents.

[0017] Preferably, the drying temperature of the dryer is 80-150℃.

[0018] Preferably, the hot pressing treatment is performed at a temperature of 150-250°C and a pressure of 5-20 MPa.

[0019] This invention provides a process for preparing high-temperature resistant transparent decorative printing paper. It has the following beneficial effects:

[0020] 1. By using special materials such as polyimide resin and glass fiber, combined with specific silane coupling agents and antioxidants, this invention achieves excellent high-temperature resistance. In high-temperature environments, such as automotive interiors, home appliances, and electronic products, this printing paper can withstand temperatures of 250-300 degrees Celsius and remain stable, without easily deforming or degrading. This significantly improves the durability and reliability of the product, extends its service life, reduces the frequency of maintenance and replacement, and thus lowers long-term usage costs.

[0021] 2. By focusing on optimizing transparency and processing performance during the preparation process, this invention ensures that the printing paper has high transparency and good leveling properties, enabling it to exhibit excellent visual effects and aesthetics when applied to various decorative scenarios. At the same time, the good processing performance makes the printing paper easier to coat, dry and heat-press, which not only improves production efficiency but also reduces production costs. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] This invention provides a process for preparing high-temperature resistant transparent decorative printing paper, including the following steps:

[0025] S1. Take the following raw materials and mix them in the following weight percentages: 30% homopolymer polyimide resin, 5% glass fiber, 2% vinyltriethoxysilane, 1% 2,6-di-tert-butyl-p-cresol, 10% silica, 25% toluene, 1% dispersant, 1% defoamer, 1% leveling agent, and 1% antisettling agent.

[0026] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The mixing speed of the mixed slurry is 300 rpm.

[0027] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0028] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0029] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0030] The drying temperature of the dryer is 120°C, and the temperature of the hot pressing treatment is 200°C and the pressure is 10 MPa.

[0031] Example 2:

[0032] S1. Take the following raw materials in the following weight percentage ratios: 35% biphenyl polyimide resin, 7% glass fiber, 2% methacryloyloxypropyltrimethoxysilane, 1.5% triethyl phosphite, 15% aluminum hydroxide, 30% methyl ethyl ketone, and keep the proportions of other additives unchanged.

[0033] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 400 rpm.

[0034] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0035] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0036] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0037] The drying temperature of the dryer is 100℃, and the temperature of the hot pressing treatment is 180℃, with a pressure of 8MPa.

[0038] Example 3:

[0039] S1. Take the following raw materials in the following weight percentage ratios: 40% homopolymer polyimide resin, 9% glass fiber, 1.5% vinyltriethoxysilane, 1.5% 2,6-di-tert-butyl-p-cresol, 20% calcium carbonate, 35% acetone, and keep the proportions of other additives unchanged.

[0040] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 200 rpm.

[0041] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0042] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0043] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0044] The drying temperature of the dryer is 140°C, and the temperature of the hot pressing treatment is 220°C and the pressure is 12MPa.

[0045] Example 4:

[0046] S1. Take the following raw materials in the following weight percentage ratios: 35% biphenyl polyimide resin, 10% glass fiber, 2% vinyltriethoxysilane, 1% 2,6-di-tert-butyl-p-cresol, 10% silicon dioxide, 20% ethyl acetate, and keep the proportions of other additives unchanged.

[0047] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 500 rpm.

[0048] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0049] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0050] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0051] The drying temperature of the dryer is 130°C, and the temperature of the hot pressing treatment is 210°C and the pressure is 15MPa.

[0052] Example 5:

[0053] S1. Take the following raw materials in the following weight percentage ratio: 25% homopolymer polyimide resin, 12% glass fiber, 3% methacryloyloxypropyltrimethoxysilane, 1% triethyl phosphite, 5% aluminum hydroxide, 40% toluene, and keep the proportions of other additives unchanged.

[0054] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 300 rpm.

[0055] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0056] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0057] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0058] The drying temperature of the dryer is 150°C, and the temperature of the hot pressing treatment is 230°C and the pressure is 5 MPa.

[0059] Example 6:

[0060] S1. Take the following raw materials in the following weight percentage ratios: 40% biphenyl polyimide resin, 15% glass fiber, 4% vinyltriethoxysilane, 1.5% 2,6-di-tert-butyl-p-cresol, 15% calcium carbonate, 20% methyl ethyl ketone, and keep the proportions of other additives unchanged.

[0061] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 400 rpm.

[0062] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0063] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0064] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0065] The drying temperature of the dryer is 110°C, and the temperature of the hot pressing treatment is 190°C and the pressure is 7 MPa.

[0066] Comparative Example 1:

[0067] S1. Take the following raw materials in the following weight percentage ratios: 40% homopolymer polyimide resin, 9% glass fiber, 1.5% vinyltriethoxysilane, 1.5% 2,6-di-tert-butyl-p-cresol, 20% calcium carbonate, 35% acetone, and keep the proportions of other additives unchanged.

[0068] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 500 rpm.

[0069] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0070] S4. Peel off the dried transparent decorative layer to obtain individual transparent decorative printing paper.

[0071] The drying temperature of the dryer is 130°C, and the temperature of the hot pressing treatment is 210°C and the pressure is 15MPa.

[0072] Comparative Example 2:

[0073] S1. Take the following raw materials and mix them in the following weight percentages: 40% homopolymer polyimide resin, 9% glass fiber, 1.5% 2,6-di-tert-butyl-p-cresol, 20% calcium carbonate, 35% acetone, and keep the proportions of other additives unchanged.

[0074] S2. Add the above materials into the mixing tank in proportion and stir evenly to form a mixed slurry. The stirring speed is 500 rpm.

[0075] S3. The mixed slurry is coated onto the carrier paper and dried using a dryer to form a transparent decorative layer;

[0076] S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance;

[0077] S5. After the transparent decorative layer is cooled to room temperature, it is peeled off to obtain an independent high-temperature resistant transparent decorative printing paper.

[0078] The drying temperature of the dryer is 130°C, and the temperature of the hot pressing treatment is 210°C and the pressure is 15MPa.

[0079] The decorative printing paper prepared in the above embodiments and comparative examples was subjected to the following performance tests, and the test data are shown in the table below:

[0080]

[0081]

[0082] Table 1

[0083] As can be seen from Table 1, the decorative printing paper prepared by the present invention can withstand high temperatures and remain stable, is not easily deformed or degraded, has good transparency and strong adhesion, and can exhibit excellent visual effects and aesthetics when applied to various decorative scenarios.

[0084] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for preparing high-temperature resistant transparent decorative printing paper, characterized in that, Includes the following steps: S1. The following raw materials are formulated in the following weight percentages: polyimide resin 20%-40%, glass fiber 5%-15%, silane coupling agent 1%-5%, antioxidant 0.5%-2%, filler 5%-20%, solvent 20%-30%, and other additives 1%-5%; The polyimide resin is selected from one or more of homophenyl polyimide and biphenyl polyimide; The silane coupling agent is selected from one or more of vinyltriethoxysilane and methacryloxypropyltrimethoxysilane; The antioxidant is selected from one or more of 2,6-di-tert-butyl-p-cresol and triethyl phosphite; S2. Add the above materials into the mixing tank according to the proportion and stir evenly to form a mixed slurry; the stirring speed is 200-500 rpm; S3. The mixed slurry is coated onto carrier paper, which serves as a temporary carrier, and dried using a dryer to form a transparent decorative layer; S4. The dried transparent decorative layer is subjected to hot pressing treatment to improve its adhesion and high temperature resistance; S5. After the hot-pressed transparent decorative layer is cooled to room temperature, it is peeled off from the carrier paper to obtain an independent, high-temperature resistant transparent decorative printing paper without carrier paper. The hot pressing process is carried out at a temperature of 150-250℃ and a pressure of 5-20MPa.

2. The process for preparing high-temperature resistant transparent decorative printing paper according to claim 1, characterized in that, The filler is selected from one or more of silicon dioxide, aluminum hydroxide and calcium carbonate.

3. The process for preparing high-temperature resistant transparent decorative printing paper according to claim 1, characterized in that, The solvent is selected from one or more of toluene, butanone, acetone, and ethyl acetate.

4. The process for preparing high-temperature resistant transparent decorative printing paper according to claim 1, characterized in that, The other additives include dispersants, defoamers, leveling agents, and antisettling agents.

5. The process for preparing high-temperature resistant transparent decorative printing paper according to claim 1, characterized in that, The drying temperature of the dryer is 80-150℃.

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