A waterproof and stain-resistant composite woven fabric and its preparation process

Abstract

The present invention relates to a waterproof and stain-resistant composite woven fabric and its preparation process, belonging to the technical field of woven fabrics. The composite woven fabric prepared by the present invention comprises a film coating layer and a woven layer from top to bottom. The woven layer is woven from polypropylene fibers and nylon fibers, and 5 wt% of oleic acid amide is added to the polypropylene fibers. The film coating layer is coated with a waterproof and stain-resistant coating. The formula of the waterproof and stain-resistant coating comprises the following components in parts by weight: 45-55 parts of aqueous polyurethane emulsion, 5-15 parts of aqueous acrylic emulsion, 10-20 parts of filler, 3-5 parts of polydimethylsiloxane, 3-5 parts of dimethyl silicone oil, and 1-3 parts of film-forming promoter. The composite woven fabric prepared by the present invention has the characteristics of good waterproofness and long-term stain resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of woven fabrics, and relates to a waterproof and stain-resistant composite woven fabric and a preparation process thereof. Background Art

[0002] As a common material, woven fabrics are widely used in many fields such as packaging, construction, agriculture, and transportation due to their light weight, durability, easy processing, etc. However, traditional woven fabrics have obvious deficiencies in waterproof and stain-resistant properties, which limits their application in outdoor environments. Coated woven fabrics combine the substrate strength of woven fabrics with the protective properties of the coating layer, thus achieving a significant improvement in performance. They not only retain the original unique texture and aesthetic appearance of woven fabrics but also endow the woven fabrics with properties such as waterproofing and moisture resistance through coating a specific film layer. These excellent properties enable coated woven fabrics to still maintain a good use state in various harsh environments, greatly expanding their application scope. Therefore, it is particularly important to develop a waterproof and stain-resistant composite woven fabric with more excellent performance and a wider application range and its preparation process. Summary of the Invention

[0003] The purpose of the present invention is to provide a waterproof and stain-resistant composite woven fabric and a preparation process thereof, which have the characteristics of good waterproofness and long-term stain resistance.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A waterproof and stain-resistant composite woven fabric, the composite woven fabric comprises a coating layer and a woven layer from top to bottom, wherein the coating layer is coated with a waterproof and stain-resistant coating, and the formula of the waterproof and stain-resistant coating comprises the following components in parts by weight: 45 - 55 parts of aqueous polyurethane emulsion, 5 - 15 parts of aqueous acrylic emulsion, 10 - 20 parts of filler, 3 - 5 parts of polydimethylsiloxane, 3 - 5 parts of dimethyl silicone oil, and 1 - 3 parts of film-forming promoter.

[0006] Among them, the preparation method of the filler is as follows:

[0007] S1-1: Mix titanium tetraisopropoxide, ammonium fluoride, and deionized water, add 3 M nitric acid solution to adjust the pH to 2 - 3, then add cerium nitrate, stir at a speed of 500 - 600 r / min at 60 - 80 °C for 2 - 4 h, wash with deionized water and place in a vacuum drying oven at 60 °C for 10 - 14 h, then transfer to a muffle furnace for calcination, cool to room temperature and put into a ball mill for ball milling for 1.5 - 2.5 h, and the ball milling speed is 250 - 350 r / min to obtain powder A.

[0008] S1-2: Mix mica powder and an intercalating agent in a mass ratio of 1:(19 - 21), ultrasonicate for 2 - 4 h at 50 - 60 °C, wash with deionized water, and dry in a vacuum drying oven at 60 °C for 6 - 10 h to obtain powder B;

[0009] S1-3: Mix powder A, powder B, and graphitic carbon nitride in a mass ratio of 1:2:0.5, put them into a ball mill and ball mill for 1 - 2 h at a ball mill rotation speed of 150 - 250 r / min. Subsequently, add tolyl diphenyl phosphate and continue ball milling for 1.5 h while maintaining the rotation speed to obtain the filler.

[0010] As a preferred technical solution of the present invention, the woven layer is woven from polypropylene fibers and nylon fibers, and 5 wt% oleic acid amide is added to the polypropylene fibers.

[0011] As a preferred technical solution of the present invention, in S1-1, titanium tetraisopropoxide, ammonium fluoride, and deionized water are mixed in a mass ratio of 1:(0.1 - 0.2):(18 - 20).

[0012] As a preferred technical solution of the present invention, the addition amount of cerium nitrate in S1-1 is 0.5 times the mass of ammonium fluoride.

[0013] As a preferred technical solution of the present invention, the calcination temperature in S1-1 is 500 - 600 °C, and the calcination duration is 2 - 3 h.

[0014] As a preferred technical solution of the present invention, in S1-2, the intercalating agent is a mixture of sulfuric acid, hydrogen peroxide, and deionized water in a volume ratio of 1:1:2.

[0015] As a preferred technical solution of the present invention, the addition amount of tolyl diphenyl phosphate in S1-3 is 3 - 5 wt% of the total mass of powder A, powder B, and graphitic carbon nitride.

[0016] As a preferred technical solution of the present invention, the film-forming promoter is alcohol ester 12.

[0017] As a preferred technical solution of the present invention, the preparation method of the waterproof and stain-resistant coating is as follows,

[0018] S9-1: Put the aqueous polyurethane emulsion and the aqueous acrylic emulsion into the feed tank according to the formula ratio, and stir at a rotation speed of 450 - 550 r / min for 30 - 50 min;

[0019] S9-2: Sequentially put the filler, polydimethylsiloxane, and dimethyl silicone oil into the feed tank, increase the rotation speed to 650 - 750 r / min, and stir for 1.5 h;

[0020] S9-3: Put the film-forming agent into the feed tank and stir it at a speed of 450 - 550 r / min for 10 - 20 min to obtain the waterproof and stain-resistant coating.

[0021] A preparation method of a waterproof and stain-resistant composite woven fabric. The specific steps of the preparation method are as follows: Coat the waterproof and stain-resistant coating on the woven layer at a coating linear speed of 10 - 20 m / min, and place it in a vacuum drying oven at 60 - 70 °C for drying for 1 - 2 h to obtain the waterproof and stain-resistant composite woven fabric.

[0022] During the formation process of titanium dioxide, ammonium fluoride is added. During the preparation process, fluoride ions enter the titanium dioxide lattice to form fluorine-doped titanium dioxide. Fluorine element doping can effectively improve the light response efficiency of titanium dioxide, produce a sideband red shift effect, and play a role in crystal form regulation during the crystallization process of titanium dioxide. Fluorine-doped titanium dioxide can utilize sunlight more effectively, effectively degrade pollutants, and endow the surface of the woven fabric with self-cleaning and stain resistance. Fluorine element doping changes the surface properties of titanium dioxide, making it hydrophobic and having a low surface energy.

[0023] The introduction of cerium nitrate enables cerium to promote the effective separation of electrons and holes by introducing impurity energy levels or changing the energy band structure of titanium dioxide, enhancing the photoactivity of titanium dioxide, and further improving the self-cleaning property of the woven fabric. Cerium element doping can also enhance the redox ability of titanium dioxide. Due to the variable valence characteristics of cerium, it can participate in the redox process in the catalytic reaction, thereby improving the activity of titanium dioxide.

[0024] The co-doping of fluorine and cerium can also optimize the separation efficiency of electrons and holes. The introduction of fluorine can change the surface properties of titanium dioxide, while cerium doping can promote the effective separation of electrons and holes. The synergistic effect of the two further reduces the recombination rate of electrons and holes. The co-doping of fluorine and cerium can also improve the stability and durability of titanium dioxide. Due to the doping effects of fluorine and cerium, the chemical stability and thermal stability of titanium dioxide are enhanced, enabling the woven fabric to maintain high stain resistance and stability during long-term use.

[0025] Through the intercalation treatment, the layer spacing of mica powder can be effectively changed, thereby improving its physical and chemical properties. The mica powder after intercalation treatment can play a more effective filling and strengthening role in the coating, effectively enhancing the comprehensive properties of the coating such as mechanical strength, heat resistance, and weather resistance.

[0026] Graphitic carbon nitride, as a high-performance material, has excellent mechanical strength, which can further enhance the performance of the filler and improve the hardness, wear resistance and corrosion resistance of the coating. At the same time, graphitic carbon nitride has a light response ability, which can further improve the self-cleaning ability of the coating and effectively enhance its stain resistance. The addition of tolyl diphenyl phosphate can act as a compatibilizer between the filler and the coating matrix, enhancing the interaction between the filler and the coating matrix, thereby improving the adhesion of the coating and effectively enhancing the stability and durability of the coating during long-term use.

[0027] Dimethyl silicone oil can reduce the viscosity of the coating, improve the fluidity of the coating, making it easier to coat. At the same time, it can also improve the surface gloss of the coating, making the coating smoother and more beautiful. In addition, dimethyl silicone oil has the characteristics of hydrophobicity and moisture resistance, so that it can significantly improve the water resistance of the coating in the coating. When the coating contains dimethyl silicone oil, a dense waterproof layer will form on the surface of the coating, which can effectively prevent the penetration of water molecules, thereby protecting the woven layer from moisture erosion.

[0028] Adding oleic acid amide to polypropylene fibers, oleic acid amide has good lubricating properties, which can reduce the friction and resistance of the fibers during processing, help reduce the wear and breakage of the fibers during weaving, and improve the production efficiency and quality of the woven fabric. Oleic acid amide has the effect of anti-fouling, which can reduce the adhesion and penetration of stains on the fiber surface, and oleic acid amide can reduce the adhesion between the stain and the fiber. Oleic acid amide can also promote the compatibility of polypropylene fibers and nylon fibers, which helps to improve the overall performance and structural stability of the woven fabric.

[0029] Advantages of the present invention:

[0030] (1) In the present invention, by introducing ammonium fluoride and cerium nitrate during the formation of titanium dioxide, co-doping of fluorine and cerium is achieved, significantly improving the light response efficiency and activity of titanium dioxide, and also endowing the surface of the woven fabric with hydrophobicity and low surface energy, realizing the improvement of self-cleaning and stain resistance. In addition, the addition of mica powder and graphitic carbon nitride treated by intercalation further improves the performance of the coating. Tolyl diphenyl phosphate as a compatibilizer enhances the interaction between the filler and the coating matrix, improving the adhesion of the coating and the long-term use stability. The introduction of dimethyl silicone oil further improves the water resistance of the woven fabric.

[0031] (2) By using polypropylene fibers and nylon fibers intertwined to form a woven layer, and adding 5wt% oleic acid amide to the polypropylene fibers, the stain resistance of the woven fabric is significantly improved. The addition of oleic acid amide not only enhances the lubricity and anti-wear properties of the fibers, improves the production efficiency and quality, but also reduces the adhesion of stains through its anti-fouling effect, enhances the hydrophobicity of the fiber surface, making the woven fabric have excellent self-cleaning and long-term stain resistance. DETAILED DESCRIPTION

[0032] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0033] Example 1

[0034] A waterproof and stain-resistant composite woven fabric, the composite woven fabric comprises a coating layer and a woven layer from top to bottom, wherein the coating layer is coated with a waterproof and stain-resistant coating, and a formula 1 of the waterproof and stain-resistant coating comprises the following components, in parts by weight: 50 parts of an aqueous polyurethane emulsion, 10 parts of an aqueous acrylic emulsion, 15 parts of a filler, 4 parts of polydimethylsiloxane, 4 parts of dimethyl silicone oil, 122 parts of an alcohol ester,

[0035] Wherein, the preparation method of the filler is as follows:

[0036] S1-1: Titanium tetraisopropoxide, ammonium fluoride and deionized water were mixed in a mass ratio of 1:0.15:19, 3 M nitric acid solution was added to adjust the pH to 2.5, and then 0.5 times the mass of ammonium fluoride of cerium nitrate was added, and the mixture was stirred at 70°C and 550 r / min for 3 h, washed with deionized water and dried in a 60°C vacuum drying oven for 12 h, and then transferred to a muffle furnace for calcination at a temperature of 550°C for 2.5 h. After cooling to room temperature, the mixture was placed in a ball mill for 2 h at a ball mill speed of 300 r / min to obtain powder A;

[0037] S1-2: mica powder and an intercalant are mixed in a mass ratio of 1:20, wherein the intercalant is sulfuric acid, hydrogen peroxide and deionized water in a volume ratio of 1:1:2, ultrasonicated at 55 °C for 3 h, washed with deionized water, and dried in a vacuum drying oven at 60 °C for 8 h to obtain powder B;

[0038] S1-3: Powder A, powder B and graphite phase carbon nitride are mixed in a mass ratio of 1:2:0.5, and the mixture is put into a ball mill for ball milling for 1.5 h at a ball milling speed of 200 r / min. Subsequently, 4 wt% of the total mass of powder A, powder B and graphite phase carbon nitride is added toluene diphenyl phosphate, and the ball milling is continued for 1.5 h while maintaining the speed to obtain the filler.

[0039] The braided layer is woven from polypropylene fibers and nylon fibers, wherein 5 wt % oleic acid amide is added to the polypropylene fibers.

[0040] The preparation method of the waterproof and anti-fouling coating is as follows:

[0041] S9-1: Pour the aqueous polyurethane emulsion and the aqueous acrylic emulsion into the feed tank according to the ratio of Formulation 1, and stir at a speed of 500 r / min for 40 min;

[0042] S9-2: Sequentially add the filler, polydimethylsiloxane, and dimethyl silicone oil into the feed tank, increase the rotation speed to 700 r / min, and stir for 1.5 h;

[0043] S9-3: Add alcohol ester 12 into the feed tank, and stir at a speed of 500 r / min for 15 min to obtain the waterproof and stain-resistant coating.

[0044] A preparation method of a waterproof and stain-resistant composite woven fabric. The specific steps of the preparation method are as follows: Coat the waterproof and stain-resistant coating on the woven layer, the coating line speed is 10 - 20 m / min, and place it in a vacuum drying oven at 60 - 70 °C for drying for 1 - 2 h to obtain the waterproof and stain-resistant composite woven fabric.

[0045] Example 2

[0046] A waterproof and stain-resistant composite woven fabric, the composite woven fabric includes a film coating layer and a woven layer from top to bottom. Among them, the film coating layer is coated with a waterproof and stain-resistant coating. The formulation 2 of the waterproof and stain-resistant coating includes the following components, in parts by weight: 45 parts of aqueous polyurethane emulsion, 5 parts of aqueous acrylic emulsion, 10 parts of filler, 3 parts of polydimethylsiloxane, 3 parts of dimethyl silicone oil, and 1 part of alcohol ester 12.

[0047] Among them, the preparation method of the filler is as follows:

[0048] S1-1: Mix titanium tetraisopropoxide, ammonium fluoride, and deionized water according to a mass ratio of 1:0.1:18, add 3 M nitric acid solution to adjust the pH to 2, then add cerium nitrate 0.5 times the mass of ammonium fluoride, stir at a speed of 500 r / min at 60 °C for 2 h, wash with deionized water and place in a vacuum drying oven at 60 °C for drying for 10 h, then transfer to a muffle furnace for calcination. The calcination temperature is 500 °C, the calcination duration is 2 h, cool to room temperature and then put it into a ball mill for ball milling for 1.5 h, and the ball milling speed is 250 r / min to obtain powder A;

[0049] S1-2: Mix mica powder and an intercalating agent according to a mass ratio of 1:19. The intercalating agent is a mixture of sulfuric acid, hydrogen peroxide, and deionized water in a volume ratio of 1:1:2. Ultrasonic at 50 °C for 2 h, wash with deionized water, and place in a vacuum drying oven at 60 °C for drying for 6 h to obtain powder B;

[0050] S1-3: Mix powder A, powder B, and graphitic carbon nitride in a mass ratio of 1:2:0.5, put them into a ball mill and ball mill for 1 h at a ball milling speed of 150 r / min. Subsequently, add tolyl diphenyl phosphate accounting for 3 wt% of the total mass of powder A, powder B, and graphitic carbon nitride, and continue to ball mill for 1.5 h while maintaining the speed to obtain the filler.

[0051] The woven layer is woven from polypropylene fibers and nylon fibers, and 5 wt% oleamide is added to the polypropylene fibers.

[0052] The preparation method of the waterproof and stain-resistant coating is as follows.

[0053] S9-1: Put the aqueous polyurethane emulsion and aqueous acrylic emulsion into the feed tank according to the ratio of formulation 2, and stir at a speed of 450 r / min for 30 - 50 min.

[0054] S9-2: Put the filler, polydimethylsiloxane, and dimethyl silicone oil into the feed tank in sequence, increase the speed to 650 r / min, and stir for 1.5 h.

[0055] S9-3: Put alcohol ester 12 into the feed tank and stir at a speed of 450 r / min for 10 min to obtain the waterproof and stain-resistant coating.

[0056] A preparation method of a waterproof and stain-resistant composite woven fabric. The specific steps of the preparation method are as follows: Coat the waterproof and stain-resistant coating on the woven layer at a coating line speed of 10 m / min, and place it in a vacuum drying oven at 60 °C for drying for 1 h to obtain the waterproof and stain-resistant composite woven fabric.

[0057] Example 3

[0058] A waterproof and stain-resistant composite woven fabric. The composite woven fabric includes a coating layer and a woven layer from top to bottom. The coating layer is coated with the waterproof and stain-resistant coating. The formulation 3 of the waterproof and stain-resistant coating includes the following components in parts by weight: 55 parts of aqueous polyurethane emulsion, 15 parts of aqueous acrylic emulsion, 20 parts of filler, 5 parts of polydimethylsiloxane, 5 parts of dimethyl silicone oil, and 3 parts of alcohol ester 12.

[0059] Among them, the preparation method of the filler is as follows.

[0060] S1-1: Mix titanium tetraisopropoxide, ammonium fluoride, and deionized water in a mass ratio of 1: 0.2: 20. Add 3 M nitric acid solution to adjust the pH to 3. Subsequently, add cerium nitrate that is 0.5 times the mass of ammonium fluoride. Stir at 80 °C at a rotation speed of 600 r / min for 4 h. Wash with deionized water and place in a vacuum drying oven at 60 °C for drying for 14 h. Then transfer to a muffle furnace for calcination. The calcination temperature is 600 °C, and the calcination duration is 3 h. After cooling to room temperature, put it into a ball mill for ball milling for 2.5 h. The ball milling speed is 350 r / min to obtain powder A;

[0061] S1-2: Mix mica powder and an intercalating agent in a mass ratio of 1: 21. The intercalating agent is a mixture of sulfuric acid, hydrogen peroxide, and deionized water in a volume ratio of 1: 1: 2. Ultrasonic for 4 h at 60 °C, wash with deionized water, and place in a vacuum drying oven at 60 °C for drying for 10 h to obtain powder B;

[0062] S1-3: Mix powder A, powder B, and graphitic carbon nitride in a mass ratio of 1: 2: 0.5. Put them into a ball mill for ball milling for 2 h. The ball milling speed is 250 r / min. Subsequently, add tolyl diphenyl phosphate that is 5 wt% of the total mass of powder A, powder B, and graphitic carbon nitride, and continue ball milling for 1.5 h while maintaining the rotation speed to obtain the filler.

[0063] The woven layer is woven from polypropylene fibers and nylon fibers, and 5 wt% oleic acid amide is added to the polypropylene fibers.

[0064] The preparation method of the waterproof and stain-resistant coating is as follows,

[0065] S9-1: Put the aqueous polyurethane emulsion and the aqueous acrylic emulsion into the feed tank according to the proportion of Formula 3, and stir at a rotation speed of 550 r / min for 50 min;

[0066] S9-2: Put the filler, polydimethylsiloxane, and dimethyl silicone oil into the feed tank in sequence, raise the rotation speed to 750 r / min, and stir for 1.5 h;

[0067] S9-3: Put alcohol ester 12 into the feed tank and stir at a rotation speed of 550 r / min for 20 min to obtain the waterproof and stain-resistant coating.

[0068] A preparation method of a waterproof and stain-resistant composite woven fabric. The specific steps of the preparation method are as follows: Coat the waterproof and stain-resistant coating on the woven layer. The coating line speed is 20 m / min, and place it in a vacuum drying oven at 70 °C for drying for 2 h to obtain the waterproof and stain-resistant composite woven fabric.

[0069] Comparative Example 1

[0070] Ammonium fluoride is not added during the preparation of the filler, and the remaining steps are the same as those in Example 1.

[0071] Comparative Example 2

[0072] Cerium nitrate is not added during the preparation of the filler, and the remaining steps are the same as those in Example 1.

[0073] Comparative Example 3

[0074] Graphitic carbon nitride is not added during the preparation of the filler, and the remaining steps are the same as those in Example 1.

[0075] Comparative Example 4

[0076] Dimethyl silicone oil is not added during the preparation of the waterproof and stain-resistant coating, and the remaining steps are the same as those in Example 1.

[0077] The waterproof performance of the examples and comparative examples was tested according to AATCC 22-2017 "Spray Method for Testing the Water Repellency of Textiles", and the test was repeated after 50 washes.

[0078] The experimental data are summarized in the following table.

[0079]

[0080] The stain resistance of the examples and comparative examples was tested according to GB / T30159.1-2013 "Testing and Evaluation of Stain Resistance of Textiles - Part 1: Resistance to Soiling", and the test was repeated after 50 washes.

[0081] The experimental data are summarized in the following table.

[0082]

[0083] From the data of the examples and comparative examples, it can be seen that the composite woven fabric prepared by the present invention has good waterproofness and stain resistance.

[0084] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to make equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A waterproof and stain-resistant composite woven fabric, characterized in that: The composite woven fabric comprises a coating layer and a woven layer from top to bottom, wherein the coating layer is coated with a waterproof and stain-resistant coating, and the formula of the waterproof and stain-resistant coating comprises the following components, in parts by weight, 45-55 parts of waterborne polyurethane emulsion, 5-15 parts of waterborne acrylic emulsion, 10-20 parts of filler, 3-5 parts of polydimethylsiloxane, 3-5 parts of dimethyl silicone oil, 1-3 parts of alcohol ester 12, Wherein, the preparation method of the filler is as follows: S1-1: Titanium tetraisopropoxide, ammonium fluoride and deionized water were mixed, 3 M nitric acid solution was added to adjust the pH to 2-3, and then cerium nitrate was added, stirred at 60-80°C at a speed of 500-600 r / min for 2-4 h, washed with deionized water and dried in a vacuum drying oven at 60°C for 10-14 h, then transferred to a muffle furnace for calcination, cooled to room temperature, and then placed in a ball mill for 1.5-2.5 h at a ball mill speed of 250-350 r / min to obtain powder A; S1-2: mica powder and an intercalant are mixed in a mass ratio of 1:(19-21), wherein the intercalant is sulfuric acid, hydrogen peroxide and deionized water in a volume ratio of 1:1:2, ultrasonicated at 50-60°C for 2-4 h, washed with deionized water, and dried in a vacuum drying oven at 60°C for 6-10 h to obtain powder B; S1-3: Powder A, powder B and graphite phase carbon nitride are mixed in a mass ratio of 1:2:0.5, and the mixture is put into a ball mill for ball milling for 1 to 2 hours at a ball milling speed of 150 to 250 r / min. Subsequently, toluene diphenyl phosphate is added, and the speed is maintained while ball milling is continued for 1.5 hours to obtain the filler.

2. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: The braided layer is woven from polypropylene fibers and nylon fibers, wherein 5 wt % oleic acid amide is added to the polypropylene fibers.

3. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: In the S1-1, titanium tetraisopropoxide, ammonium fluoride and deionized water are mixed in a mass ratio of 1: (0.1-0.2): (18-20).

4. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: The amount of cerium nitrate added in S1-1 is 0.5 times the mass of ammonium fluoride.

5. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: In the S1-1, the calcination temperature is 500-600°C, and the calcination time is 2-3 h.

6. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: The amount of toluene diphenyl phosphate added in S1-3 is 3-5 wt% of the total mass of powder A, powder B and graphite phase carbon nitride.

7. The waterproof and stain-resistant composite woven fabric according to claim 1, characterized in that: The preparation method of the waterproof and anti-fouling coating is as follows: S9-1: Add water-based polyurethane emulsion and water-based acrylic emulsion into the material tank according to the formula ratio, and stir at a speed of 450-550 r / min for 30-50 min; S9-2: Add filler, polydimethylsiloxane and dimethyl silicone oil into the material tank in sequence, increase the speed to 650-750 r / min, and stir for 1.5 h; S9-3: Add the alcohol ester 12 into a material tank and stir at a speed of 450-550 r / min for 10-20 min to obtain the waterproof and stain-resistant coating.

8. A process for preparing the waterproof and stain-resistant composite woven fabric according to any one of claims 1 to 7, characterized in that: The specific steps of the preparation process are as follows: coating the waterproof and stain-resistant coating on the woven layer at a coating line speed of 10-20 m / min, placing it in a vacuum drying oven at 60-70°C for 1-2 h, and obtaining the waterproof and stain-resistant composite woven fabric.

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