Flame-retardant high-temperature-resistant woven cloth and preparation method thereof

Abstract

The application discloses a kind of flame-retardant high-temperature woven cloth.The application discloses the preparation method of the above-mentioned flame-retardant high-temperature woven cloth, comprising the following steps: homopolymerization polypropylene, flame-retardant masterbatch, maleic anhydride grafting polypropylene, polyisobutylene masterbatch PW60, color masterbatch, light stabilizer UV-327, antioxidant 1010 are uniformly mixed, melt extrusion, cutting, longitudinal stretch, setting, cooling, weaving obtain prefabricated woven layer;Homopolymerization polypropylene, flame-retardant masterbatch, color masterbatch, light stabilizer UV-327, antioxidant 1010 are uniformly mixed to obtain flame-retardant layer premix;Random copolymerization polypropylene, color masterbatch, light stabilizer UV-327, antioxidant 1010 are uniformly mixed to obtain non-woven fabric layer premix;Flame-retardant layer premix is cast to the front of prefabricated woven layer, and non-woven fabric layer premix is cast to the back of prefabricated woven layer, cooling obtains flame-retardant high-temperature woven cloth.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of woven cloth, in particular to a flame-retardant high-temperature-resistant woven cloth and a preparation method thereof. BACKGROUND

[0002] Because plastics have the characteristics of small density, high specific strength, excellent dielectric performance, good chemical resistance and easy molding, they replace traditional materials (such as metals and wood) in many fields such as automobiles, buildings, electronics, light industry, aerospace, biology and agriculture, and become indispensable new materials.

[0003] In the past few decades, polyethylene plastics have been widely used in plastic packaging materials, woven cloth materials and other aspects due to their superior performance, and the development speed of polyethylene plastics far exceeds that of other materials. Especially when the steel production of industrialized countries is in a declining trend, the output of polyethylene is developing at a high speed.

[0004] However, the oxygen index of polyethylene plastics is only 18.5, which belongs to flammable materials. In the actual use process, the use performance of the plastic woven cloth product is greatly limited, which brings great safety hazards when used as packaging materials or building covering materials, and limits its application.

[0005] In order to improve the flame retardance of the plastic woven cloth, the prior art usually adds a flame retardant. Although the flame retardant effect is good, the heat resistance is poor, the compatibility of the flame retardant with the polypropylene and polyethylene resin matrix is poor, and the use is affected. Therefore, on the basis of reducing the amount of the flame retardant, improving the flame-retardant high-temperature-resistant effect is an urgent problem to be solved at present. SUMMARY

[0006] The present application relates to the technical field of woven cloth, in particular to a flame-retardant high-temperature-resistant woven cloth and a preparation method thereof.

[0007] A preparation method of a flame-retardant high-temperature-resistant woven cloth, comprising the following steps:

[0008] S1, uniformly mixing homopolymer polypropylene, flame-retardant masterbatch, maleic anhydride grafted polypropylene, polyisobutylene masterbatch PW60, color masterbatch, light stabilizer UV-327 and antioxidant 1010, melt extruding, cutting, longitudinally stretching, shaping, cooling and weaving to obtain a pre-prepared woven layer;

[0009] S2, uniformly mixing homopolymer polypropylene, flame-retardant masterbatch, color masterbatch, light stabilizer UV-327 and antioxidant 1010 to obtain a flame-retardant layer premix;

[0010] S3, uniformly mixing random copolymer polypropylene, color masterbatch, light stabilizer UV-327 and antioxidant 1010 to obtain a non-woven fabric layer premix;

[0011] S4, the flame-retardant layer is cast on the front surface of the pre-woven layer, the non-woven layer is cast on the back surface of the pre-woven layer, and the flame-retardant high-temperature-resistant woven cloth is obtained by cooling.

[0012] Preferably, in S1, the mass ratio of the homopolymer polypropylene, the flame-retardant masterbatch, the maleic anhydride grafted polypropylene, the polyisobutylene masterbatch PW60, the color masterbatch, the light stabilizer UV-327, and the antioxidant 1010 is 20-60:4-10:1-3:5-15:1-2:1-2:1-2.

[0013] Preferably, in S1, the melt extrusion is performed by using an extruder, and the barrel temperature of the extruder is 180-220℃.

[0014] Preferably, in S1, the longitudinal stretching is performed in an oven, and the temperature of the oven is 140-150℃.

[0015] Preferably, in S1, the shaping is performed by using a heat setting roll, and the temperature of the heat setting roll is 80-90℃.

[0016] Preferably, in S2, the mass ratio of the homopolymer polypropylene, the flame-retardant masterbatch, the color masterbatch, the light stabilizer UV-327, and the antioxidant 1010 is 20-60:5-12:1-2:1-2:1-2.

[0017] Preferably, in S3, the mass ratio of the random copolymer polypropylene, the color masterbatch, the light stabilizer UV-327, and the antioxidant 1010 is 20-60:1-2:1-2:1-2.

[0018] Preferably, the flame-retardant masterbatch used in S1 and S2 is prepared by the following steps: carbon fibers and magnesium hydroxide are added to dimethyl sulfoxide and stirred, methyltrimethoxysilane is added under stirring, stirring is continued, ammonia water is added and stirring is continued, ethanol is used for soaking, filtration, washing, and vacuum drying to obtain the flame-retardant masterbatch.

[0019] Preferably, the mass fraction of the ammonia water is 10-18%, and the mass ratio of the carbon fibers, the magnesium hydroxide, the methyltrimethoxysilane, and the ammonia water is 5-15:10-20:4-10:1-5.

[0020] Preferably, in S4, the mass ratio of the flame-retardant layer premix, the pre-woven layer, and the non-woven layer premix is 14-39:66-94:12-33.

[0021] A flame-retardant high-temperature-resistant woven cloth is prepared by using the above-mentioned preparation method.

[0022] Advantages:

[0023] The application adds the flame-retardant masterbatch in the woven layer and the flame-retardant layer pre-mixture, and the flame-retardant layer pre-mixture is cast on the woven layer, which significantly improves the flame-retardant performance of the woven cloth, and the flame-retardant performance is significantly improved in the case of less flame-retardant additive in the polypropylene flame-retardant layer.

[0024] The application adds the flame-retardant masterbatch in the woven cloth, and the flame-retardant masterbatch is deposited on the surface of the magnesium hydroxide to form the silicon dioxide, and the magnesium hydroxide is compounded with the carbon fiber, so that the obtained flame-retardant masterbatch not only has small density, but also has excellent flame-retardant performance, and can further enhance the strength of the woven cloth.

[0025] The preparation method of the technology is simple, beneficial to popularization and application, the obtained plastic woven cloth has good flame-retardant performance, high mechanical strength, strong use stability, is safe and environmentally friendly without halogen, and has great market competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The oxygen index comparison chart of the flame-retardant high-temperature-resistant woven cloth obtained in Example 5 and Comparative Examples 1-2.

[0027] Figure 2 The tensile strength and the tensile strength retention rate after aging of the flame-retardant high-temperature-resistant woven cloth obtained in Example 5 and Comparative Examples 1-2 are compared.

[0028] Figure 3 The weight loss rate comparison chart of the flame-retardant high-temperature-resistant woven cloth obtained in Example 5 and Comparative Examples 1-2 under different aging time in the thermal oxidation aging environment. DETAILED DESCRIPTION

[0029] The application will be further described below in combination with specific embodiments.

[0030] Example 1

[0031] A preparation method of a flame-retardant high-temperature-resistant woven cloth, comprising the following steps:

[0032] S1, 20 kg of homopolymer polypropylene, 4 kg of flame-retardant masterbatch, 1 kg of maleic anhydride grafted polypropylene, 5 kg of polyisobutylene masterbatch PW60, 1 kg of color masterbatch, 1 kg of light stabilizer UV-327, and 1 kg of antioxidant 1010 are uniformly mixed, and are added to an extruder for melt extrusion, the barrel temperature of the extruder is 180 DEG C, the temperature is lowered, and the cutting is performed, the longitudinal stretching is performed in the oven at the temperature of 140 DEG C, the setting is performed in the heat setting roller at the temperature of 80 DEG C for 1 min, the cooling is performed, and the pre-prepared woven layer is obtained through the circular weaving machine;

[0033] S2, 20 kg of homopolymer polypropylene, 5 kg of flame retardant masterbatch, 1 kg of color masterbatch, 1 kg of light stabilizer UV-327, 1 kg of antioxidant 1010 are mixed uniformly to obtain a flame retardant layer premix;

[0034] S3, 20 kg of random copolymer polypropylene, 1 kg of color masterbatch, 1 kg of light stabilizer UV-327, 1 kg of antioxidant 1010 are mixed uniformly to obtain a non-woven fabric layer premix;

[0035] S4, 14 kg of flame retardant layer premix is cast onto the front of 66 kg of preformed braided layer, and 12 kg of non-woven fabric layer premix is cast onto the back of the above preformed braided layer, and cooled to obtain a flame-retardant high-temperature resistant braided cloth.

[0036] The flame retardant masterbatch used in S1 and S2 is prepared by the following steps: 5 kg of carbon fiber, 10 kg of magnesium hydroxide is added to 50 kg of dimethyl sulfoxide, stirred at a speed of 1000 r / min for 1 h, 4 kg of methyl trimethoxysilane is added under stirring, continue to stir for 1 h, 1 kg of 10% ammonia water is added, continue to stir for 10 min, soak in ethanol for 10 h, filter, wash once with ethanol, and vacuum dry to obtain the flame retardant masterbatch.

[0037] Example 2

[0038] A preparation method of a flame-retardant high-temperature resistant braided cloth, comprising the following steps:

[0039] S1, 60 kg of homopolymer polypropylene, 10 kg of flame retardant masterbatch, 3 kg of maleic anhydride grafted polypropylene, 15 kg of polyisobutylene masterbatch PW60, 2 kg of color masterbatch, 2 kg of light stabilizer UV-327, 2 kg of antioxidant 1010 are mixed uniformly, added into an extruder for melt extrusion, the barrel temperature of the extruder is 220℃, cooled, cut, stretched longitudinally in an oven at a temperature of 150℃, set in a heat setting roll at a temperature of 90℃ for 2 min, cooled, and woven by a circular weaving machine to obtain a preformed braided layer;

[0040] S2, 60 kg of homopolymer polypropylene, 12 kg of flame retardant masterbatch, 2 kg of color masterbatch, 2 kg of light stabilizer UV-327, 2 kg of antioxidant 1010 are mixed uniformly to obtain a flame retardant layer premix;

[0041] S3, 60 kg of random copolymer polypropylene, 2 kg of color masterbatch, 2 kg of light stabilizer UV-327, 2 kg of antioxidant 1010 are mixed uniformly to obtain a non-woven fabric layer premix;

[0042] S4, 39 kg of flame retardant layer premix is cast onto the front of 94 kg of preformed braided layer, and 33 kg of non-woven fabric layer premix is cast onto the back of the above preformed braided layer, and cooled to obtain a flame-retardant high-temperature resistant braided cloth.

[0043] The flame-retardant masterbatch used in S1 and S2 is prepared by the following steps: 15 kg of carbon fiber and 20 kg of magnesium hydroxide are added to 100 kg of dimethyl sulfoxide, stirred at a speed of 2000 r / min for 2 h, 10 kg of methyltrimethoxysilane is added under stirring, and stirring is continued for 2 h, 5 kg of 18% ammonia water is added, stirring is continued for 30 min, ethanol is used for soaking for 20 h, filtration is performed, ethanol is used for washing 5 times, and vacuum drying is performed to obtain the flame-retardant masterbatch.

[0044] Example 3

[0045] A preparation method of a flame-retardant high-temperature-resistant woven fabric, comprising the following steps:

[0046] S1, 30 kg of homopolymer polypropylene, 8 kg of flame-retardant masterbatch, 1.5 kg of maleic anhydride grafted polypropylene, 12 kg of polyisobutylene masterbatch PW60, 1.3 kg of color masterbatch, 1.8 kg of light stabilizer UV-327, and 1.3 kg of antioxidant 1010 are uniformly mixed, and are melt-extruded by using an extruder, the barrel temperature of the extruder is 210°C, cooling is performed, cutting is performed, longitudinal stretching is performed in an oven at a temperature of 142°C, setting is performed in a heat setting roller at a temperature of 88°C for 1.5 min, cooling is performed, and a pre-prepared woven layer is obtained by weaving through a circular weaving machine;

[0047] S2, 30 kg of homopolymer polypropylene, 10 kg of flame-retardant masterbatch, 1.3 kg of color masterbatch, 1.8 kg of light stabilizer UV-327, and 1.3 kg of antioxidant 1010 are uniformly mixed to obtain a flame-retardant layer premix;

[0048] S3, 50 kg of random copolymer polypropylene, 1.2 kg of color masterbatch, 1.7 kg of light stabilizer UV-327, and 1.2 kg of antioxidant 1010 are uniformly mixed to obtain a non-woven fabric layer premix;

[0049] S4, 33 kg of the flame-retardant layer premix is cast onto the front side of 76 kg of the pre-prepared woven layer, and 27 kg of the non-woven fabric layer premix is cast onto the back side of the pre-prepared woven layer, and cooling is performed to obtain the flame-retardant high-temperature-resistant woven fabric.

[0050] The flame-retardant masterbatch used in S1 and S2 is prepared by the following steps: 8 kg of carbon fiber and 18 kg of magnesium hydroxide are added to 70 kg of dimethyl sulfoxide, stirred at a speed of 1800 r / min for 80 min, 8 kg of methyltrimethoxysilane is added under stirring, and stirring is continued for 80 min, 4 kg of 12% ammonia water is added, stirring is continued for 15 min, ethanol is used for soaking for 17 h, filtration is performed, ethanol is used for washing 2 times, and vacuum drying is performed to obtain the flame-retardant masterbatch.

[0051] Example 4

[0052] A preparation method of a flame-retardant high-temperature-resistant woven fabric, comprising the following steps:

[0053] S1, 50 kg of homopolymer polypropylene, 6 kg of flame retardant masterbatch, 2.5 kg of maleic anhydride grafted polypropylene, 8 kg of polyisobutylene masterbatch PW60, 1.7 kg of color masterbatch, 1.2 kg of light stabilizer UV-327, 1.7 kg of antioxidant 1010 are uniformly mixed, added into an extruder for melt extrusion, the barrel temperature of the extruder is 190℃, cooled, cut, stretched longitudinally in an oven at a temperature of 148℃, set in a heat setting roller at a temperature of 82℃ for 1.5 min, cooled, and woven into a pre-woven layer by a circular weaving machine;

[0054] S2, 50 kg of homopolymer polypropylene, 6 kg of flame retardant masterbatch, 1.7 kg of color masterbatch, 1.2 kg of light stabilizer UV-327, 1.7 kg of antioxidant 1010 are uniformly mixed to obtain a flame retardant layer premix;

[0055] S3, 30 kg of random copolymer polypropylene, 1.8 kg of color masterbatch, 1.3 kg of light stabilizer UV-327, 1.8 kg of antioxidant 1010 are uniformly mixed to obtain a non-woven layer premix;

[0056] S4, 21 kg of the flame retardant layer premix is cast onto the front side of 84 kg of the pre-woven layer, and 18 kg of the non-woven layer premix is cast onto the back side of the pre-woven layer, and cooled to obtain a flame-retardant high-temperature-resistant woven cloth.

[0057] The flame retardant masterbatch used in S1 and S2 is prepared by the following steps: 12 kg of carbon fiber and 12 kg of magnesium hydroxide are added to 90 kg of dimethyl sulfoxide, stirred at a speed of 1200 r / min for 100 min, 6 kg of methyltrimethoxysilane is added under stirring, and stirring is continued for 100 min, 2 kg of 16% ammonia water is added, and stirring is continued for 25 min, soaked in ethanol for 13 h, filtered, washed with ethanol 4 times, and vacuum dried to obtain the flame retardant masterbatch.

[0058] Example 5

[0059] A method for preparing a flame-retardant high-temperature-resistant woven cloth, comprising the following steps:

[0060] S1, 40 kg of homopolymer polypropylene, 7 kg of flame retardant masterbatch, 2 kg of maleic anhydride grafted polypropylene, 10 kg of polyisobutylene masterbatch PW60, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 are uniformly mixed, added into an extruder for melt extrusion, the barrel temperature of the extruder is 200℃, cooled, cut, stretched longitudinally in an oven at a temperature of 145℃, set in a heat setting roller at a temperature of 85℃ for 1.5 min, cooled, and woven into a pre-woven layer by a circular weaving machine;

[0061] S2, 40 kg of homopolymer polypropylene, 8 kg of flame retardant masterbatch, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a flame retardant layer premix;

[0062] S3, 40 kg of random copolymer polypropylene, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a non-woven fabric layer premix;

[0063] S4, 27 kg of flame retardant layer premix was cast onto the front side of 80 kg of pre-woven layer, and 22.5 kg of non-woven fabric layer premix was cast onto the back side of the above pre-woven layer, and cooled to obtain a flame-retardant high-temperature resistant woven fabric.

[0064] The flame retardant masterbatch used in S1 and S2 is prepared by the following steps: 10 kg of carbon fiber, 15 kg of magnesium hydroxide is added to 80 kg of dimethyl sulfoxide, stirred at 1500 r / min for 90 min, 7 kg of methyl trimethoxysilane is added under stirring, continue to stir for 90 min, add 3 kg of 14% ammonia water, continue to stir for 20 min, soak in ethanol for 15 h, filter, wash with ethanol for 3 times, vacuum drying to obtain the flame retardant masterbatch.

[0065] Comparative Example 1

[0066] A preparation method of a flame-retardant high-temperature resistant woven fabric, comprising the following steps:

[0067] S1, 40 kg of homopolymer polypropylene, 7 kg of flame retardant, 2 kg of maleic anhydride grafted polypropylene, 10 kg of polyisobutylene masterbatch PW60, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 were mixed uniformly, added into an extruder for melt extrusion, the barrel temperature of the extruder was 200℃, cooled, cut, stretched longitudinally in an oven at a temperature of 145℃, and set in a heat setting roll at a temperature of 85℃ for 1.5 min, cooled, and woven by a circular weaving machine to obtain a pre-woven layer;

[0068] S2, 40 kg of homopolymer polypropylene, 8 kg of flame retardant, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a flame retardant layer premix;

[0069] S3, 40 kg of random copolymer polypropylene, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a non-woven fabric layer premix;

[0070] S4, 27 kg of the flame-retardant layer premix was cast onto the front side of 80 kg of the pre-woven layer, and 22.5 kg of the non-woven layer premix was cast onto the back side of the pre-woven layer, and the flame-retardant high-temperature-resistant woven fabric was obtained after cooling.

[0071] In S1 and S2, the flame-retardant material was prepared by mixing 10 kg of carbon fiber and 15 kg of magnesium hydroxide uniformly.

[0072] Comparative Example 2

[0073] A method for preparing a flame-retardant high-temperature-resistant woven fabric, comprising the following steps:

[0074] S1, 40 kg of homopolymer polypropylene, 2.1875 kg of carbon fiber, 4.8125 kg of flame-retardant material, 2 kg of maleic anhydride grafted polypropylene, 10 kg of polyisobutylene masterbatch PW60, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, and 1.5 kg of antioxidant 1010 were mixed uniformly, and then were fed into an extruder for melt extrusion, the barrel temperature of the extruder was 200℃, and then the extrudate was cooled, stretched longitudinally in an oven at 145℃, and set in a heat setting roll at 85℃ for 1.5 min, and then was cooled, and finally was woven into a pre-woven layer by a circular weaving machine;

[0075] S2, 40 kg of homopolymer polypropylene, 2.5 kg of carbon fiber, 5.5 kg of flame-retardant material, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, and 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a flame-retardant layer premix;

[0076] S3, 40 kg of random copolymer polypropylene, 1.5 kg of color masterbatch, 1.5 kg of light stabilizer UV-327, and 1.5 kg of antioxidant 1010 were mixed uniformly to obtain a non-woven layer premix;

[0077] S4, 27 kg of the flame-retardant layer premix was cast onto the front side of 80 kg of the pre-woven layer, and 22.5 kg of the non-woven layer premix was cast onto the back side of the pre-woven layer, and the flame-retardant high-temperature-resistant woven fabric was obtained after cooling.

[0078] In S1 and S2, the flame-retardant material was prepared by the following steps: 15 kg of magnesium hydroxide was added into 80 kg of dimethyl sulfoxide, and stirred at a speed of 1500 r / min for 90 min, 7 kg of methyltrimethoxysilane was added under stirring, and the stirring was continued for 90 min, 3 kg of ammonia water with a mass fraction of 14% was added, and the stirring was continued for 20 min, and then the mixture was soaked in ethanol for 15 h, filtered, washed with ethanol for 3 times, and vacuum dried to obtain the flame-retardant material.

[0079] The oxygen index of the flame-retardant high-temperature-resistant woven fabric obtained in Example 5 and Comparative Examples 1-2 was determined according to GB / T 2406.2-2009 "Determination of the flammability of plastics - Part 2: Test method - Horizontal and vertical method".

[0080] like Figure 1 As shown, the flame-retardant high-temperature resistant woven fabric obtained in Example 5 has the highest oxygen index, indicating its optimal flame-retardant performance. The applicant believes this is because the invention incorporates flame-retardant masterbatch into both the woven layer and the flame-retardant layer premix, and then casts the flame-retardant layer premix onto the woven layer, significantly improving the flame-retardant performance of the woven fabric. This results in a significant improvement in flame-retardant performance despite the low amount of flame retardant added to the polypropylene flame-retardant layer. Furthermore, the flame-retardant masterbatch, through the deposition of silica on the surface of magnesium hydroxide and the compounding of magnesium hydroxide with carbon fibers, greatly enhances its flame-retardant performance.

[0081] The tensile strength of the flame-retardant and high-temperature resistant woven fabrics obtained in Example 5 and Comparative Examples 1-2 was measured according to GB / T 1040.3-2006 "Determination of tensile properties of plastics - Part 3: Test conditions for films and sheets". Subsequently, the samples were aged using a UV-A340 lamp according to GB / T 16422.3-2022 "Laboratory light source exposure test method for plastics - Part 3: Fluorescent ultraviolet lamp", and the tensile strength of the samples was tested again according to the above tensile strength test method. The tensile strength retention rate after aging was calculated according to the following formula:

[0082] Tensile strength retention rate after aging = Tensile strength after aging / Tensile strength before aging × 100%

[0083] like Figure 2 As shown, compared with the comparative example, the tensile strength and aging resistance of the flame-retardant and high-temperature resistant woven fabric obtained in Example 5 are significantly improved. This confirms that by adding flame-retardant masterbatch and maleic anhydride-grafted polypropylene to the woven fabric, on the one hand, the dispersion of flame-retardant masterbatch in homopolymer polypropylene matrix is ​​effectively promoted, thereby improving the aging resistance and mechanical strength of the woven fabric. On the other hand, the flame-retardant masterbatch is made of magnesium hydroxide and carbon fiber, and silica is deposited on the surface of magnesium hydroxide to form silica, which can greatly and effectively enhance the mechanical strength.

[0084] Continue to conduct thermo-oxidative aging tests on the flame-retardant and high-temperature resistant woven fabrics obtained in Example 5 and Comparative Examples 1-2. Place each group of samples in an electric heating drying oven and conduct thermo-oxidative aging at 200°C. On day 0, day 2, day 4, day 6, day 8, and day 10, take out the samples and weigh them, and calculate the weight loss rate M of the samples under different aging times in the thermo-oxidative aging environment.

[0085] M=(m0-m t ) / m0×100%

[0086] M is the weight loss rate of the sample (%); m0 is the mass of the sample before aging (g); m t The mass (g) of the sample after aging for t hours.

[0087] likeFigure 3 As shown, the weight loss rate of the flame-retardant high-temperature resistant woven fabric obtained in Example 5 is the lowest at all times, which proves that the flame-retardant high-temperature resistant woven fabric obtained in the application has good high-temperature resistance, and the weight loss rate is relatively small affected by the heat oxygen aging.

[0088] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical range disclosed in the present application according to the technical solutions and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for preparing a flame-retardant and high-temperature resistant woven fabric, characterized in that, Includes the following steps: S1. Homopolymer polypropylene, flame retardant masterbatch, maleic anhydride grafted polypropylene, polyisobutylene masterbatch PW60, color masterbatch, light stabilizer UV-327, and antioxidant 1010 are mixed evenly, melt-extruded, cut, longitudinally stretched, shaped, cooled, and woven to obtain a prefabricated woven layer. S2. Homopolymer polypropylene, flame retardant masterbatch, color masterbatch, light stabilizer UV-327, and antioxidant 1010 are mixed evenly to obtain flame retardant layer premix. The flame retardant masterbatches used in S1 and S2 are prepared by the following steps: carbon fiber and magnesium hydroxide are added to dimethyl sulfoxide and stirred. Methyltrimethoxysilane is added while stirring, and stirring is continued. Ammonia water is added and stirring is continued. The masterbatches are soaked in ethanol, filtered, washed, and vacuum dried to obtain the flame retardant masterbatches. The mass fraction of ammonia is 10-18%, and the mass ratio of carbon fiber, magnesium hydroxide, methyltrimethoxysilane, and ammonia is 5-15:10-20:4-10:1-5. S3. Mix random copolymer polypropylene, color masterbatch, light stabilizer UV-327 and antioxidant 1010 evenly to obtain nonwoven fabric layer premix. S4. The flame-retardant premix is ​​cast onto the front side of the prewoven layer, and the nonwoven premix is ​​cast onto the back side of the prewoven layer. After cooling, a flame-retardant and high-temperature resistant woven fabric is obtained.

2. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S1, the mass ratio of homopolymer polypropylene, flame retardant masterbatch, maleic anhydride grafted polypropylene, polyisobutylene masterbatch PW60, color masterbatch, light stabilizer UV-327, and antioxidant 1010 is 20-60:4-10:1-3:5-15:1-2:1-2:1-2.

3. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S1, melt extrusion is performed using an extruder, and the extruder barrel temperature is 180-220℃.

4. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S1, longitudinal stretching is performed in an oven at a temperature of 140-150℃; heat setting rollers are used for setting the shape at a temperature of 80-90℃.

5. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S2, the mass ratio of homopolymer polypropylene, flame retardant masterbatch, color masterbatch, light stabilizer UV-327, and antioxidant 1010 is 20-60:5-12:1-2:1-2:1-2.

6. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S3, the mass ratio of random copolymer polypropylene, color masterbatch, light stabilizer UV-327, and antioxidant 1010 is 20-60:1-2:1-2:1-2.

7. The method for preparing the flame-retardant and high-temperature resistant woven fabric according to claim 1, characterized in that, In S4, the mass ratio of the flame-retardant layer premix, the prewoven layer, and the nonwoven layer premix is ​​14-39:66-94:12-33.

8. A flame-retardant and high-temperature resistant woven fabric, characterized in that, The flame-retardant and high-temperature resistant woven fabric is prepared by the method described in any one of claims 1-7.

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