Preparation method of wear-resistant hollow fabric

Abstract

The invention belongs to the technical field of fabrics, and particularly relates to a preparation method of a wear-resistant hollow fabric, the wear-resistant hollow fabric takes a hollow fabric woven by phenyl silane-containing polyester fibers as a base cloth fabric, and the surface of the base cloth fabric is coated with a porous wear-resistant layer to obtain the wear-resistant hollow fabric. According to the invention, the problem that the mechanical property and the wear resistance of the hollow fabric are reduced is solved, the mechanical property of the polyester base cloth is improved by using the doped modified polyester fiber of trichlorophenyl silane, and the lightweight thermal insulation fabric is formed by using the low thermal conductivity and the porous structure of the silicon dioxide aerogel and cooperating with the porous structure generated by the pore-foaming agent.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a method for preparing abrasion-resistant hollow fabric. Background Technology

[0002] Traditional thermal clothing uses high-weight or multi-layered fabrics to prevent heat loss. However, these fabrics are relatively thick and have extremely poor breathability. Garments made from these fabrics are bulky and inconvenient for daily work and life. With the development of modern fabrics towards high performance and lightweight designs, hollow core fabrics, with their porous structure, offer excellent insulation and are relatively lightweight, making them a new favorite in the fabric industry. However, due to the pursuit of lightweight design, the weight of hollow core fabrics is relatively reduced. The hollow, porous structure occupies space within the fabric material, leading to a significant decrease in mechanical properties, particularly abrasion resistance, which reduces the fabric's lifespan and practicality. Summary of the Invention

[0003] To address the problems in the existing technology, this invention provides a method for preparing wear-resistant hollow fabric, which solves the problem of decreased mechanical properties and wear resistance of hollow fabric. It utilizes trichlorophenylsilane to modify polyester fibers, thereby improving the mechanical properties of the polyester base fabric. Furthermore, it utilizes the low thermal conductivity and porous structure of silica aerogel, combined with the porous structure generated by the pore-forming agent, to form a lightweight thermal insulation fabric.

[0004] To achieve the above technical objectives, the technical solution of the present invention is as follows: A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: Phenylacetyltrichlorosilane is added to aqueous diethyl ether and stirred until homogeneous. Then, it is distilled under reduced pressure to obtain trihydroxyphenylsilane. The aqueous diethyl ether is saturated, and the concentration of phenyltrichlorosilane in the ether is 400-500 g / L. The stirring speed is 100-200 r / min, and the temperature is 5-10℃. The reduced pressure distillation temperature is 10-15℃, and the pressure is 80-90% of atmospheric pressure. This step utilizes aqueous diethyl ether as a solvent to completely disperse and dissolve phenyltrichlorosilane. Water molecules in the ether directly contact the phenyltrichlorosilane, converting its chlorine groups to hydroxyl groups, forming a silane containing noble hydroxyl groups. During the reduced pressure distillation process, the ether exhibits good volatility, allowing it to be converted into vapor and removed. The boiling point of phenyltrihydroxysilane is much higher than that of diethyl ether and also much higher than the ambient temperature. Therefore, the phenyltrihydroxysilane maintains good stability, resulting in the acquisition of trihydroxyphenylsilane. A phenylsilane material; wherein the saturated aqueous diethyl ether is prepared by spraying distilled water into diethyl ether, ultrasonically treating it for 10-20 min, and then allowing it to stand for 1-2 h before taking the ether solution to obtain saturated aqueous diethyl ether. The volume ratio of distilled water to diethyl ether is 1:3-5, the spraying speed is 1-3 mL / min, the spraying area is 100-200 cm2, the ultrasonic frequency of the ultrasonic treatment is 80-100 kHz, and the temperature is 5-10℃; the standing temperature is 5-10℃. This treatment method can uniformly disperse distilled water into diethyl ether. The dispersibility of the sprayed droplets ensures that the distilled water is completely dispersed in the diethyl ether, greatly reducing the difficulty of dispersing distilled water in diethyl ether. Combined with the subsequent ultrasonic treatment, the homogeneous dispersion of distilled water in diethyl ether is ensured. Finally, the diethyl ether is ensured to completely absorb the distilled water in a slightly soluble state, thus ensuring that the distilled water in the diethyl ether is saturated when the diethyl ether and distilled water separate into layers, greatly improving the dispersion efficiency of distilled water in diethyl ether. Step 2: The polyester granules are placed in an ethanol-water solution and stirred evenly. After filtration, the polyester granules are removed, then mixed with ethanol and ground. After drying, fine polyester powder is obtained. The volume percentage of ethanol in the ethanol-water solution is 30-40%, the concentration of polyester granules in the ethanol-water solution is 200-300 g / L, the stirring speed is 100-200 r / min, the mass ratio of polyester granules to ethanol is 3-5:1, the grinding pressure is 0.5-0.7 MPa, and the drying temperature is 80-90℃. This step utilizes the solubility and permeability of the ethanol-water solution to remove impurities from the polyester granules, thereby achieving a cleaning effect. After cleaning, ethanol is used as a lubricant for wet grinding to refine the polyester granules into fine powder. Furthermore, wet grinding in a liquid phase system can homogenize the polyester. Step 3: Trihydroxyphenylsilane and polyester fine powder are ground and blended, and then melt-spun to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric. The mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:7-9, the grinding and blending temperature is 5-10℃, the grinding pressure is 0.3-0.5MPa, and the melt-spinning temperature is 280-290℃. This step utilizes the blending of trihydroxyphenylsilane and polyester fine powder to obtain hollow polyester fibers through high-temperature melt spinning. In this system, trihydroxyphenylsilane is homogeneously dispersed in the polyester fine powder and forms in-situ silanol condensation during melt spinning, thereby improving the stability and abrasion resistance of the fiber. Step 4: Spray alkaline solution onto the surface of silica aerogel, wash to obtain alkalized silica aerogel, then place it in polyurethane, and add a pore-forming agent and a crosslinking agent in sequence. After stirring and mixing, a coating material is obtained. The alkaline solution is a sodium hydroxide solution with a pH of 9. The spraying speed is 1-4 mL / min, and the area is 100-200 cm2. Distilled water is used for washing. The mass ratio of the coating material is: 60-70 parts polyurethane, 10-20 parts silica aerogel, 0.4-0.6 parts pore-forming agent, and 0.3-0.5 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. This step uses alkaline solution spraying to form a liquid film on the surface of silica aerogel, and the surface activity of silica aerogel is improved by the corrosion of silica by sodium hydroxide. As polyurethane, crosslinking agent, and pore-forming agent are blended, a coating slurry is obtained. Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 40-55g / m2, and the drying temperature is 175-180℃ for 100-120s.

[0005] As can be seen from the above description, the present invention has the following advantages: 1. This invention solves the problem of decreased mechanical properties and abrasion resistance of hollow fabrics. It utilizes trichlorophenylsilane to modify polyester fibers, thereby improving the mechanical properties of the polyester base fabric. It also utilizes the low thermal conductivity and porous structure of silica aerogel, combined with the porous structure generated by the pore-forming agent, to form a lightweight thermal insulation fabric. 2. The present invention provides a method for controlling the low-temperature hydrolysis of phenyltrichlorosilane in aqueous diethyl ether, forming a stable trihydroxyphenylsilane under low-temperature conditions, and forming in-situ polycondensation in hollow polyester fibers, which effectively improves the mechanical properties of hollow base fabric. 3. This invention utilizes alkalization treatment to enhance the surface activity of silica aerogel, effectively reducing its inertia and improving its connectivity and stability in coatings. Simultaneously, the porous structure of silica aerogel itself can form a porous structure outside hollow fibers, which, combined with the decomposition of pore-forming agents, forms a double porous structure, thereby ensuring the lightweight nature of the fabric. Detailed Implementation

[0006] The present invention will be described in detail with reference to the embodiments, but the claims of the present invention will not be limited in any way. Example 1

[0007] A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: Add phenyltrichlorosilane to aqueous diethyl ether and stir until homogeneous. Then, distill under reduced pressure to obtain trihydroxyphenylsilane. The aqueous diethyl ether is saturated aqueous diethyl ether, and the concentration of phenyltrichlorosilane in the aqueous diethyl ether is 400 g / L. The stirring speed is 200 r / min, and the temperature is 10°C. The temperature of the reduced pressure distillation is 15°C, and the pressure is 90% of atmospheric pressure. The saturated aqueous diethyl ether is obtained by spraying distilled water into the diethyl ether, ultrasonicating for 20 min, and allowing it to stand for 2 h before collecting the ether solution. The volume ratio of distilled water to diethyl ether is 1:3, the spraying speed is 1 mL / min, the spraying area is 200 cm², the ultrasonic frequency of the ultrasonic treatment is 100 kHz, and the temperature is 10°C. The standing temperature is 10°C. Step 2: The polyester granules are placed in an ethanol aqueous solution and stirred evenly. After filtration, the polyester granules are removed. Then, the polyester granules are mixed with ethanol and ground. After drying, fine polyester powder is obtained. The volume percentage of ethanol in the ethanol aqueous solution is 30%, the concentration of polyester granules in the ethanol aqueous solution is 200 g / L, the stirring speed for even stirring is 200 r / min, the mass ratio of polyester granules to ethanol is 3:1, the grinding pressure is 0.7 MPa, and the drying temperature is 90℃. Step 3: Grind and blend trihydroxyphenylsilane and polyester fine powder, and melt spin to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric; the mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:7, the grinding and blending temperature is 10℃, the grinding pressure is 0.5MPa, and the melt spinning temperature is 280℃. Step 4: Spray alkaline solution onto the surface of silica aerogel, wash it to obtain alkalized silica aerogel, then place it in polyurethane, and add a pore-forming agent and a crosslinking agent in sequence. After stirring and mixing, a coating material is obtained. The alkaline solution is a sodium hydroxide solution with a pH of 9. The spraying speed is 1 mL / min and the area is 200 cm2. Distilled water is used for washing. The mass ratio of the coating material is: 60 parts polyurethane, 10 parts silica aerogel, 0.4 parts pore-forming agent, and 0.3 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 40g / m2, and the drying temperature is 180℃ for 120s. Example 2

[0008] A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: Add phenyltrichlorosilane to aqueous diethyl ether and stir until homogeneous. Then, distill under reduced pressure to obtain trihydroxyphenylsilane. The aqueous diethyl ether is saturated aqueous diethyl ether, and the concentration of phenyltrichlorosilane in the aqueous diethyl ether is 500 g / L. The stirring speed is 100 r / min, and the temperature is 5°C. The temperature of the reduced pressure distillation is 10°C, and the pressure is 80% of atmospheric pressure. The saturated aqueous diethyl ether is obtained by spraying distilled water into the diethyl ether, ultrasonicating for 10 min, allowing it to stand for 1 h, and then collecting the ether solution. The volume ratio of distilled water to diethyl ether is 1:5, the spraying speed is 3 mL / min, the spraying area is 100 cm², the ultrasonic frequency of the ultrasonic treatment is 80 kHz, and the temperature is 5°C. The standing temperature is 5°C. Step 2: The polyester granules are placed in an ethanol aqueous solution and stirred evenly. After filtration, the polyester granules are removed. Then, the polyester granules are mixed with ethanol and ground. After drying, fine polyester powder is obtained. The volume percentage of ethanol in the ethanol aqueous solution is 40%, the concentration of polyester granules in the ethanol aqueous solution is 300 g / L, the stirring speed is 100 r / min, the mass ratio of polyester granules to ethanol is 5:1, the grinding pressure is 0.5 MPa, and the drying temperature is 80℃. Step 3: Grind and blend trihydroxyphenylsilane and polyester fine powder, and melt spin to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric; the mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:9, the grinding and blending temperature is 5°C, the grinding pressure is 0.3MPa, and the melt spinning temperature is 280°C. Step 4: Spray alkaline solution onto the surface of silica aerogel, wash to obtain alkalized silica aerogel, then place it in polyurethane, and add a pore-forming agent and a crosslinking agent in sequence. After stirring and mixing, a coating material is obtained. The alkaline solution is a sodium hydroxide solution with a pH of 9. The spraying speed is 4 mL / min, and the area is 100 cm2. Distilled water is used for washing. The mass ratio of the coating material is: 70 parts polyurethane, 20 parts silica aerogel, 0.6 parts pore-forming agent, and 0.5 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 55g / m2, and the drying temperature is 175℃ for 100s. Example 3

[0009] A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: Add phenyltrichlorosilane to aqueous diethyl ether and stir until homogeneous. Then, distill under reduced pressure to obtain trihydroxyphenylsilane. The aqueous diethyl ether is saturated aqueous diethyl ether, and the concentration of phenyltrichlorosilane in the aqueous diethyl ether is 450 g / L. The stirring speed is 150 r / min, and the temperature is 8°C. The temperature of the reduced pressure distillation is 13°C, and the pressure is 85% of atmospheric pressure. The saturated aqueous diethyl ether is obtained by spraying distilled water into the diethyl ether, ultrasonicating for 15 min, allowing it to stand for 2 h, and then collecting the ether solution. The volume ratio of distilled water to diethyl ether is 1:4, the spraying speed is 2 mL / min, the spraying area is 150 cm², the ultrasonic frequency of the ultrasonic treatment is 90 kHz, and the temperature is 8°C. The standing temperature is 9°C. Step 2: The polyester granules are placed in an ethanol-water solution and stirred evenly. After filtration, the polyester granules are removed. Then, the polyester granules are mixed with ethanol and ground. After drying, fine polyester powder is obtained. The volume percentage of ethanol in the ethanol-water solution is 35%, the concentration of polyester granules in the ethanol-water solution is 250 g / L, the stirring speed is 150 r / min, the mass ratio of polyester granules to ethanol is 4:1, the grinding pressure is 0.6 MPa, and the drying temperature is 85℃. Step 3: Grind and blend trihydroxyphenylsilane and polyester fine powder, and melt spin to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric; the mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:8, the grinding and blending temperature is 8°C, the grinding pressure is 0.4MPa, and the melt spinning temperature is 285°C. Step 4: Spray alkaline solution onto the surface of silica aerogel, wash it to obtain alkalized silica aerogel, then place it in polyurethane, and add a pore-forming agent and a crosslinking agent in sequence. After stirring and mixing, a coating material is obtained. The alkaline solution is a sodium hydroxide solution with a pH of 9. The spraying speed is 3 mL / min and the area is 150 cm2. Distilled water is used for washing. The mass ratio of the coating material is: 65 parts polyurethane, 15 parts silica aerogel, 0.5 parts pore-forming agent, and 0.4 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 50g / m2, and the drying temperature is 180℃ for 110s.

[0010] Comparative Example 1 A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: The polyester powder is ground and refined, and then melt-spun to obtain hollow polyester fibers, which are then woven to obtain a hollow base fabric; the grinding and refining temperature is 8℃, the grinding pressure is 0.4MPa, and the melt-spun temperature is 285℃. Step 2: Spray alkaline solution onto the surface of silica aerogel, wash it to obtain alkalized silica aerogel, then place it in polyurethane, and add a pore-forming agent and a crosslinking agent in sequence. After stirring and mixing, a coating material is obtained. The alkaline solution is a sodium hydroxide solution with a pH of 9. The spraying speed is 3 mL / min and the area is 150 cm2. Distilled water is used for washing. The mass ratio of the coating material is: 65 parts polyurethane, 15 parts silica aerogel, 0.5 parts pore-forming agent, and 0.4 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. Step 3: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 50g / m2, and the drying temperature is 180℃ for 110s.

[0011] Comparative Example 2 A method for preparing a wear-resistant hollow fabric includes the following steps: Step 1: Add phenyltrichlorosilane to aqueous diethyl ether and stir until homogeneous. Then, distill under reduced pressure to obtain trihydroxyphenylsilane. The aqueous diethyl ether is saturated aqueous diethyl ether, and the concentration of phenyltrichlorosilane in the aqueous diethyl ether is 450 g / L. The stirring speed is 150 r / min, and the temperature is 8°C. The temperature of the reduced pressure distillation is 13°C, and the pressure is 85% of atmospheric pressure. The saturated aqueous diethyl ether is obtained by spraying distilled water into the diethyl ether, ultrasonicating for 15 min, allowing it to stand for 2 h, and then collecting the ether solution. The volume ratio of distilled water to diethyl ether is 1:4, the spraying speed is 2 mL / min, the spraying area is 150 cm², the ultrasonic frequency of the ultrasonic treatment is 90 kHz, and the temperature is 8°C. The standing temperature is 9°C. Step 2: The polyester granules are placed in an ethanol-water solution and stirred evenly. After filtration, the polyester granules are removed. Then, the polyester granules are mixed with ethanol and ground. After drying, fine polyester powder is obtained. The volume percentage of ethanol in the ethanol-water solution is 35%, the concentration of polyester granules in the ethanol-water solution is 250 g / L, the stirring speed is 150 r / min, the mass ratio of polyester granules to ethanol is 4:1, the grinding pressure is 0.6 MPa, and the drying temperature is 85℃. Step 3: Grind and blend trihydroxyphenylsilane and polyester fine powder, and melt spin to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric; the mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:8, the grinding and blending temperature is 8°C, the grinding pressure is 0.4MPa, and the melt spinning temperature is 285°C. Step 4: Polyurethane, pore-forming agent, and crosslinking agent are mixed and stirred to obtain a coating material. The mass ratio of the coating material is: 65 parts polyurethane, 0.5 parts pore-forming agent, and 0.4 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent. Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric. The coating amount of the coating material is 50g / m2, and the drying temperature is 180℃ for 110s.

[0012] Comparative Example 3 Comparative Example 3 uses hollow fabric woven from ordinary hollow fibers.

[0013] Performance testing The hollow fabrics of Examples 1-3 and Comparative Examples 1-3 were used as test samples for performance testing, and the results are as follows: The abrasion resistance of hollow abrasion-resistant fabrics was tested based on the ISO5981-2007 standard.

[0014] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Wear resistance times 3812 times 3778 times 3792 times 3068 times 2807 times 2473 times Thermal insulation rate 78% 77% 78% 73% 70% 66% Fracture strength cN / dtex 4.5 4.5 4.6 3.9 4.1 3.5 Elongation at break % 28 29 28 35 31 37 The above comparisons show that the wear-resistant hollow fabric prepared by this technical solution has good wear resistance and heat insulation properties. Cross-comparisons between Example 3 and Comparative Examples 1, 2, and 3 show that trichlorophenylsilane can improve the thermal insulation properties of polyester fibers based on hollow fibers, reducing heat loss. Combined with the well-developed pore structure of silica aerogel and the homogeneous dispersion and pore formation of the pore structure by the pore-forming agent, a well-developed pore structure is formed on the coating layer, effectively reducing heat transfer and thus ensuring the excellent heat insulation properties of the hollow fabric. In this technical solution, trichlorophenylsilane improves the wear resistance of hollow fibers, and combined with silica aerogel in the coating layer, it enhances the wear resistance of the fabric. Simultaneously, this technical solution combines elongation at break and tensile strength. Comparisons with Comparative Examples 1-3 show that it effectively improves the problem of decreased tensile strength in ordinary hollow polyester fibers, and the pore structure formed by silica aerogel creates a certain elastic structure, thus ensuring a balance between elongation at break and tensile strength.

[0015] It is understood that the above detailed description of the present invention is for illustrative purposes only and is not intended to limit the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effects; as long as the usage requirements are met, they are all within the protection scope of the present invention.

Claims

1. A method for preparing a wear-resistant hollow fabric, characterized in that: Includes the following steps: Step 1: Add phenyltrichlorosilane to aqueous diethyl ether and stir until homogeneous, then distill under reduced pressure to obtain trihydroxyphenylsilane; Step 2: Put the polyester granules into an ethanol aqueous solution and stir evenly. After filtration, take out the polyester granules, then mix the polyester granules with ethanol and grind them. After drying, obtain polyester fine powder. Step 3: Grind and blend trihydroxyphenylsilane and polyester fine powder, and melt spin to obtain hollow polyester fibers, which are then woven to obtain hollow base fabric. Step 4: Spray alkaline solution onto the surface of silica aerogel, wash it to obtain alkalized silica aerogel, then put it into polyurethane, and add pore-forming agent and crosslinking agent in sequence, and mix by stirring to obtain coating material; Step 5: Apply the coating material evenly to the surface of the hollow base fabric and dry it to obtain the wear-resistant hollow fabric.

2. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: The aqueous ether in step 1 is saturated aqueous ether.

3. The method for preparing the wear-resistant hollow fabric according to claim 2, characterized in that: The saturated aqueous ether is obtained by spraying distilled water into the ether, ultrasonicating for 10-20 minutes, allowing it to stand for 1-2 hours, and then collecting the ether solution. The volume ratio of distilled water to ether is 1:3-5, the spraying rate is 1-3 mL / min, and the spraying area is 100-200 cm². 2 The ultrasonic treatment is performed at a frequency of 80-100kHz and a temperature of 5-10℃; the static temperature is 5-10℃.

4. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: In step 1, the concentration of phenyltrichlorosilane in aqueous diethyl ether is 400-500 g / L, the stirring speed is 100-200 r / min, and the temperature is 5-10℃. The temperature of vacuum distillation is 10-15℃, and the pressure is 80-90% of atmospheric pressure.

5. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: In step 2, the volume percentage of ethanol in the aqueous ethanol solution is 30-40%, the concentration of polyester particles in the aqueous ethanol solution is 200-300 g / L, and the stirring speed for uniform mixing is 100-200 r / min.

6. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: In step 2, the mass ratio of polyester granules to ethanol is 3-5:1, the grinding pressure is 0.5-0.7 MPa, and the drying temperature is 80-90℃.

7. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: In step 3, the mass ratio of trihydroxyphenylsilane to polyester fine powder is 1:7-9, the grinding and blending temperature is 5-10℃, the grinding pressure is 0.3-0.5MPa, and the melt spinning temperature is 280-290℃.

8. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: The alkaline solution used in step 4 is a sodium hydroxide solution with a pH of 9. The spraying speed is 1-4 mL / min, and the spraying area is 100-200 cm². 2 The washing process uses distilled water.

9. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: The mass ratio of the coating material in step 4 is: 60-70 parts polyurethane, 10-20 parts silica aerogel, 0.4-0.6 parts pore-forming agent, and 0.3-0.5 parts crosslinking agent. The pore-forming agent is potassium citrate, and the crosslinking agent is a silane coupling agent.

10. The method for preparing the wear-resistant hollow fabric according to claim 1, characterized in that: The coating amount in step 5 is 40-55 g / m². 2 The drying temperature is 175-180℃ and the drying time is 100-120s.