Textile fabric with tpe coating and method for its production

Abstract

This invention provides a textile fabric with a TPE coating and its preparation method, comprising a base fabric coated with a TPE coating. The raw materials for preparing the TPE coating, by weight, include: 45-55 parts polyethylene, 27-33 parts ethylene-vinyl acetate copolymer, 8-12 parts elastomer, 8-12 parts hot melt adhesive, 2-5 parts reactive nanocellulose whiskers, 1-3 parts functionalized graphene oxide, and 1.0-2.2 parts processing stabilizer. The TPE coating of this invention uses polyethylene as a matrix, exhibiting excellent film-forming properties and chemical stability, good compatibility of components, flexibility and excellent elastic recovery, high adhesion and mechanical strength, and combining barrier, waterproof, and weather-resistant properties. It bonds firmly to the textile fabric, enhancing the overall performance of the textile fabric.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, specifically to a textile fabric with a TPE coating and its preparation method. Background Technology

[0002] Coated textiles, by applying polymer coatings to the surface of fabrics, can endow them with functions such as waterproofing, abrasion resistance, and deformation resistance, and are widely used in outdoor equipment, smart wearables, bags, and industrial textiles. Thermoplastic elastomer (TPE) coated fabrics combine good flexibility and processability, making them a preferred material to replace traditional polyvinyl chloride and polyurethane coatings. Among them, modified TPE coatings based on polyethylene are gradually expanding their application in mid-to-high-end functional textile fabrics due to their controllable cost and stable film-forming properties.

[0003] Existing modified TPE coated fabrics mostly achieve performance optimization through simple blending of elastomers, toughening agents, or fillers. However, they generally suffer from key technical problems such as poor component compatibility, weak interfacial bonding, and insufficient functional synergy. Fillers are prone to agglomeration, leading to coating defects. Fabrics cannot simultaneously achieve high water pressure resistance and excellent elastic recovery. The coating and base fabric are mainly physically adsorbed, which can easily lead to peeling and detachment after long-term use. The functions are limited, making it difficult to meet the comprehensive requirements of mechanical reinforcement, waterproof barrier, and antistatic properties. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a textile fabric with a TPE coating and a method for preparing the same.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a textile fabric with a TPE coating, comprising a base fabric, the surface of which is coated with a TPE coating. By weight, the raw materials for preparing the TPE coating include: 45-55 parts of polyethylene, 27-33 parts of ethylene-vinyl acetate copolymer, 8-12 parts of elastomer, 8-12 parts of hot melt adhesive, 2-5 parts of reactive nanocellulose whiskers, 1-3 parts of functionalized graphene oxide, and 1.0-2.2 parts of processing stabilizer.

[0006] Using the above technical solutions, polyethylene serves as the continuous phase matrix of the TPE coating, providing basic film-forming properties and chemical stability; ethylene-vinyl acetate copolymer can reduce the interfacial tension between the coating components, improve component compatibility, and adjust the coating's flexibility; elastomers can enhance the coating's elastic recovery ability and improve the problem of excessive coating rigidity; hot melt adhesives can enhance the coating's cohesion and the interfacial adhesion strength between the coating and the base fabric, filling microscopic interfacial voids; reactive nanocellulose whisker surface epoxy groups can chemically bond with active groups such as amino and hydroxyl groups on the base fabric surface, significantly enhancing the interfacial bonding force between the coating and the base fabric; functionalized graphene oxide can form a physical barrier in the coating, hindering water molecule penetration and giving the coating excellent antistatic properties; processing stabilizers can ensure the fluidity of the coating raw materials during melt processing, inhibit thermo-oxidative degradation during processing, and improve the coating's long-term weather resistance.

[0007] Preferably, the processing stabilizer is composed of the following components in parts by weight: 0.5 to 1.2 parts lubricant, 0.3 to 0.6 parts antioxidant, and 0.2 to 0.4 parts light stabilizer.

[0008] By adopting the above technical solutions, the lubricant can improve the fluidity of TPE coating raw materials during the melt processing, reduce the frictional resistance during the processing, and ensure the uniformity of coating formation; the antioxidant can inhibit the oxidative degradation of coating raw materials during melt processing and long-term use, and maintain the chemical stability and mechanical properties of the coating; the light stabilizer can slow down the aging rate of the coating under light conditions, reduce the impact of light on the appearance, color and mechanical properties of the coating, and extend the service life of the coating.

[0009] Preferably, the polyethylene is low-density polyethylene or linear low-density polyethylene; the elastomer is compounded from a thermoplastic elastomer and a maleic anhydride-grafted polyolefin elastomer at a mass ratio of 2 to 3:1, wherein the thermoplastic elastomer is at least one of hydrogenated styrene-butadiene block copolymer or thermoplastic polyurethane elastomer; and the hot melt adhesive is hydrogenated C5 petroleum resin or terpene phenol resin.

[0010] Using the above technical solutions, low-density polyethylene or linear low-density polyethylene can serve as the continuous phase matrix for TPE coatings, providing basic film-forming properties and chemical stability. Low-density polyethylene can improve the melt processing fluidity of the coating, while linear low-density polyethylene can enhance the coating's toughness. The elastomer formed by the proportional blending of thermoplastic elastomer and maleic anhydride-grafted polyolefin elastomer can provide high elastic recovery through hydrogenated styrene-butadiene block copolymer or thermoplastic polyurethane elastomer, and can also improve the compatibility between the coating components and between the coating and the base fabric through the maleic anhydride-grafted polyolefin elastomer. Hydrogenated C5 petroleum resin or terpene phenol resin, used as a hot melt adhesive, can improve the initial tack of the coating, fill the microscopic interface voids of the coating, and enhance the mechanical interlocking and adhesion between the coating and the base fabric.

[0011] Preferably, the lubricant is polyethylene wax or oxidized polyethylene wax; the antioxidant is a compound of antioxidant 1010 and antioxidant 168 in a mass ratio of 0.8 to 1.2:1; and the light stabilizer is one or more of UV-770, UV-765, and UV-944.

[0012] Using the above technical solution, polyethylene wax or oxidized polyethylene wax as a lubricant can improve the fluidity of thermoplastic elastomer coating raw materials during melt processing, reduce the frictional resistance between components and between raw materials and processing equipment, and ensure the uniformity of coating formation; the antioxidant formed by compounding antioxidant 1010 and antioxidant 168 in a certain proportion can synergistically inhibit the oxidative degradation of coating raw materials during melt processing and long-term use, and maintain the chemical stability and mechanical properties of the coating; one or more of UV-770, UV-765, and UV-944 as light stabilizers can slow down the aging rate of the coating under light conditions, reduce the impact of light on appearance and mechanical properties, and extend the service life of the coating.

[0013] Preferably, the raw materials for preparing the reactive nanocellulose whiskers, by weight, include: 75-85 parts of nanocellulose whiskers, 8-12 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH-560), 100-120 parts of deionized water, and 80-100 parts of anhydrous ethanol.

[0014] Using the above technical solution, nanocellulose whiskers serve as the basic raw material for the preparation of reactive nanocellulose whiskers, providing a rigid framework and hydroxyl active sites for the product; KH-560 can undergo a condensation reaction with the hydroxyl groups on the surface of nanocellulose whiskers through hydrolysis, introducing epoxy groups onto the surface of nanocellulose whiskers; deionized water and anhydrous ethanol serve as reaction media, which can disperse nanocellulose whiskers and KH-560, providing a suitable environment for the hydrolysis of silane coupling agent and the condensation reaction with cellulose hydroxyl groups, ensuring that the reaction proceeds fully.

[0015] Preferably, the method for preparing the reactive nanocellulose whiskers includes the following steps: 1) Disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, and ultrasonically disperse for 20-30 minutes under ultrasonic power of 200-300W and frequency of 30-40kHz to form a uniform suspension. 2) Adjust the pH of the suspension obtained in step 1) to 3.5-4.5 with a 36% acetic acid solution, and add KH-560 dropwise at a uniform rate over 15-20 minutes, while stirring at a speed of 400-500 r / min during the dropwise addition. 3) Heat the mixture obtained in step 2) to 55-65℃ and stir at 400-500 r / min for 3-4 h. Then centrifuge at 5000-6000 r / min for 8-12 min. Wash the precipitate with anhydrous ethanol 3-4 times and freeze-dry at -50--40℃ and vacuum degree ≤20 Pa for 22-26 h to obtain reactive nanocellulose whiskers.

[0016] Using the above technical solution, ultrasonic dispersion can uniformly disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, preventing their aggregation; adjusting the pH to 3.5-4.5 provides suitable conditions for the hydrolysis of KH-560 and the condensation reaction with hydroxyl groups on the surface of nanocellulose whiskers; uniform dropwise addition and stirring can ensure that KH-560 reacts fully, introducing epoxy groups onto the surface of nanocellulose whiskers; heating and stirring can promote the full condensation reaction; centrifugation and washing can remove unreacted impurities; freeze drying can preserve the structural characteristics of nanocellulose whiskers, ultimately obtaining reactive nanocellulose whiskers with surface-grafted epoxy groups.

[0017] Preferably, the raw materials for preparing the functionalized graphene oxide, by weight, include: 8-12 parts of graphene oxide, 10-15 parts of 1-butyl-3-methylimidazolium tetrafluoroborate, and 150-200 parts of anhydrous ethanol.

[0018] Using the above technical solution, graphene oxide provides a two-dimensional sheet matrix for the preparation of functionalized graphene oxide, and its layered structure can form a physical barrier; 1-butyl-3-methylimidazolium tetrafluoroborate can weaken the π-π interaction between graphene oxide sheets through intercalation, improve dispersibility, and inhibit sheet aggregation; anhydrous ethanol, as a reaction medium, can disperse graphene oxide and 1-butyl-3-methylimidazolium tetrafluoroborate, providing a suitable environment for their intercalation and ensuring the smooth preparation of functionalized graphene oxide.

[0019] Preferably, the preparation method of the functionalized graphene oxide includes the following steps: (1) Graphene oxide is dispersed in anhydrous ethanol, which accounts for 60-70% of the total amount of anhydrous ethanol. The ultrasonic power is 250-350W and the frequency is 30-40kHz. The ultrasonic dispersion is carried out for 20-30 minutes to obtain a graphene oxide dispersion. (2) Dissolve 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol to prepare an ionic liquid solution. Add the ionic liquid solution dropwise to the graphene oxide dispersion at a uniform rate over 15-20 min, while maintaining ultrasonic dispersion. (3) After the addition is complete, the temperature is raised to 60-70℃ and ultrasonic dispersion is continued for 2-3 hours. Then, the mixture is centrifuged at 5000-6000 r / min for 8-12 minutes. The precipitate is washed 2-3 times with anhydrous ethanol and then vacuum dried at 50-60℃ and vacuum degree of -0.095MPa to -0.085MPa for 10-14 hours to obtain functionalized graphene oxide.

[0020] Using the above technical solution, ultrasonic dispersion ensures uniform dispersion of graphene oxide in anhydrous ethanol, preventing sheet aggregation. Dissolving 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol and then adding it dropwise to the graphene oxide dispersion allows for sufficient contact between the 1-butyl-3-methylimidazolium tetrafluoroborate and the graphene oxide. Heating and continuous ultrasonic dispersion promote the intercalation of 1-butyl-3-methylimidazolium tetrafluoroborate into the interlayer of graphene oxide. Centrifugation and washing remove unintercalated free 1-butyl-3-methylimidazolium tetrafluoroborate, and vacuum drying removes the solvent from the system, ultimately yielding functionalized graphene oxide with excellent dispersibility and stable structure.

[0021] The present invention also provides a method for preparing a textile fabric with a TPE coating, comprising the following steps: S1. Weigh out polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, and processing stabilizer according to the specified proportions. Place them separately in a vacuum drying oven and vacuum dry for 3-4 hours at 85-95℃ and a vacuum degree of -0.095MPa to -0.085MPa, controlling the moisture content to ≤0.10wt%. S2. The components dried in step S1 are fed into a co-rotating twin-screw extruder for melt blending and granulation. The extrudate is cooled in a water bath at a temperature of 18-25°C, granulated, and sieved through a 25-35 mesh vibrating screen. Then, it is dried in hot air at 80-85°C for 1.5-2.5 hours to obtain TPE coating masterbatch. S3. Surface activate the base fabric using a corona treatment machine with a power of 3-5 kW and a speed of 8-12 m / min, reducing the surface contact angle to below 45°. Then immerse the base fabric in the pretreatment solution at 25-30°C for 8-12 minutes. After removal, dry it with hot air at 110-120°C until the moisture content is ≤4 wt%. The base fabric is one of polyester woven fabric, nylon knitted fabric, or aramid nonwoven fabric, with a basis weight of 100–180 g / m². 2 ; S4. The TPE coating masterbatch obtained in step S2 is fed into a single-screw extruder and heated to melt. The temperatures of each zone are set as follows: Zone 1 160-170℃, Zone 2 170-180℃, Zone 3 180-188℃, and the die head 180-188℃. The coating is applied to the pretreated base fabric surface through a coat hanger-type T-die at a linear speed of 1.0-2.0 m / min. The coating is then combined and shaped with the rubber roller by controlling the air knife gap, so that the coating thickness is 0.12-0.18 mm. S5. The coated base fabric is sequentially cooled by three sets of cooling rollers. The temperature of the first set of cooling rollers is 30-35℃, the second set is 20-25℃, and the third set is 15-20℃. The total cooling time is 4-6 minutes. S6. Place the cooled and shaped fabric in a constant temperature oven and anneal it at 65-70℃ for 1.5-2.5 hours to obtain a textile fabric with a TPE coating.

[0022] Using the above technical solutions, vacuum drying can remove moisture from the raw materials, ensuring the stability of subsequent melt blending and coating formation; melt blending and granulation can fully mix polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, and processing stabilizers to form a uniform TPE coating masterbatch; corona treatment of the base fabric can improve surface activity, and immersion and drying in the pretreatment solution can further optimize the surface state of the base fabric, which is beneficial to the subsequent bonding between the coating and the base fabric; melt extrusion coating can uniformly coat the TPE coating masterbatch on the surface of the base fabric, achieving precise control of coating thickness; gradient cooling can quickly set the coating, control the crystallinity of the coating, and avoid forming defects; annealing can eliminate the internal stress of coating processing, improve the density and dimensional stability of the coating, and finally obtain a textile fabric with stable structure and uniform performance.

[0023] Preferably, in step S2, the temperatures of each zone of the co-rotating twin-screw extruder are set as follows: Zone 1 145-155℃, Zone 2 165-175℃, Zone 3 175-185℃, Zone 4 183-188℃, Zone 5 180-185℃, and the die head temperature 180-185℃; the screw speed is 220-320 r / min, and the melt blending time is 8-12 min. In step S3, the pretreatment solution consists of the following components: 90-100 parts of deionized water, 1.0-1.5 parts of γ-aminopropyltriethoxysilane (KH-550), and 0.4-0.8 parts of isomeric alcohol polyoxyethylene ether. The pH is adjusted to 8.0-9.0 with 25% ammonia water. The pretreatment solution is prepared fresh and used within 30 minutes after preparation.

[0024] By adopting the above technical solution, the temperature settings of each zone of the co-rotating twin-screw extruder can ensure that polyethylene, ethylene-vinyl acetate copolymer, thermoplastic elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, and processing stabilizer are fully melted and uniformly mixed, guaranteeing the fluidity and uniformity of the melt blend system, and providing a guarantee for the subsequent molding of coating masterbatch and the stability of coating performance. In step S3, the composition and pH setting of the pretreatment solution can introduce active groups on the surface of the base fabric, improve the surface condition of the base fabric to enhance the bonding effect with the subsequent coating. The pretreatment solution is prepared and used immediately and within the specified time to avoid KH-550 from self-condensing and precipitating, ensuring the effectiveness of the pretreatment solution.

[0025] The beneficial effects of this invention are as follows: This invention achieves a strong bond between the TPE coating and the textile fabric interface through the synergistic effect of the various raw material components. It exhibits excellent water pressure resistance, high elastic recovery rate, and also possesses excellent antistatic and aging resistance properties, thus meeting the long-term stable use requirements of outdoor and industrial textiles. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The specific information on the raw materials used in the embodiments of the present invention is shown in Table 1.

[0028] Table 1

[0029] The base fabric used in the following examples is all made of polyester woven fabric.

[0030] Example 1: This embodiment provides a textile fabric with a TPE coating, including fabrics with a weight of 100 g / m². 2 The base fabric has a TPE coating on its surface. By weight, the raw materials for preparing the TPE coating include: 45 parts polyethylene, 27 parts ethylene-vinyl acetate copolymer, 8 parts elastomer, 8 parts hot melt adhesive, 2 parts reactive nanocellulose whiskers, 1 part functionalized graphene oxide, 0.5 parts lubricant, 0.3 parts antioxidant, and 0.2 parts light stabilizer.

[0031] The polyethylene is low-density polyethylene; the elastomer is a compound of thermoplastic elastomer and maleic anhydride-grafted polyolefin elastomer in a mass ratio of 2:1, and the thermoplastic elastomer is a hydrogenated styrene-butadiene block copolymer; the hot melt adhesive is hydrogenated C5 petroleum resin. The lubricant is polyethylene wax; the antioxidant is a compound of antioxidant 1010 and antioxidant 168 in a mass ratio of 0.8:1; the light stabilizer is UV-770.

[0032] The raw materials for preparing reactive nanocellulose whiskers, by weight, include: 75 parts nanocellulose whiskers, 8 parts KH-560, 100 parts deionized water, and 80 parts anhydrous ethanol.

[0033] The preparation method of reactive cellulose nanofibers includes the following steps: 1) Disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, and ultrasonically disperse for 20 min under ultrasonic power of 200W and frequency of 30kHz to form a uniform suspension. 2) Adjust the pH of the suspension obtained in step 1) to 3.5 with a 36% acetic acid solution, and add KH-560 dropwise at a uniform rate over 15 min, while keeping the mixture stirred at 400 r / min during the dropwise addition. 3) The mixture obtained in step 2) was heated to 55°C and stirred at 400 r / min for 3 h. Then it was centrifuged at 5000 r / min for 8 min. The precipitate was washed three times with anhydrous ethanol and then freeze-dried at -50°C and vacuum degree ≤20 Pa for 22 h to obtain reactive nanocellulose whiskers.

[0034] The raw materials for preparing functionalized graphene oxide, by weight, include: 8 parts graphene oxide, 10 parts 1-butyl-3-methylimidazolium tetrafluoroborate, and 150 parts anhydrous ethanol.

[0035] The preparation method of functionalized graphene oxide includes the following steps: (1) Graphene oxide was dispersed in anhydrous ethanol, which accounted for 60% of the total amount of anhydrous ethanol. The ultrasonic power was 250W and the frequency was 30kHz. The ultrasonic dispersion was carried out for 20min to obtain a graphene oxide dispersion. (2) Dissolve 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol to prepare an ionic liquid solution. Add the ionic liquid solution dropwise to the graphene oxide dispersion at a uniform rate over 15 min, while maintaining ultrasonic dispersion. (3) After the addition is complete, the temperature is raised to 60℃ and ultrasonic dispersion is continued for 2 hours. Then, the mixture is centrifuged at 5000 r / min for 8 minutes. The precipitate is washed twice with anhydrous ethanol and then vacuum dried at 50℃ and vacuum degree -0.095 MPa for 10 hours to obtain functionalized graphene oxide.

[0036] This embodiment also provides a method for preparing a textile fabric with a TPE coating, comprising the following steps: S1. Weigh out polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, lubricant, antioxidant, and light stabilizer according to the specified proportions, and place them separately in a vacuum drying oven. Vacuum dry for 3 hours at 85℃ and a vacuum degree of -0.095MPa, controlling the moisture content to ≤0.10wt%. S2. The dried components from step S1 are fed into a co-rotating twin-screw extruder for melt blending and granulation. The temperatures of each zone of the co-rotating twin-screw extruder are set as follows: Zone 1 145℃, Zone 2 165℃, Zone 3 175℃, Zone 4 183℃, Zone 5 180℃, and the die head temperature is 180℃. The screw speed is 220 r / min, and the melt blending time is 8 min. The extrudate is cooled in a water bath at 18℃, granulated, sieved through a 25-mesh vibrating screen, and then dried with hot air at 80℃ for 1.5 h to obtain TPE coating masterbatch. S3. Surface activation of the base fabric is performed using a corona treatment machine with a treatment power of 3kW and a treatment speed of 8m / min, reducing the surface contact angle to below 45°. The base fabric is then immersed in the pretreatment solution at 25°C for 8 minutes, and then dried with hot air at 110°C until the moisture content is ≤4wt%. The pretreatment solution consists of the following components: 90 parts deionized water, 1 part KH-550, and 0.4 parts isomeric alcohol polyoxyethylene ether. The pH is adjusted to 8.0 with 25% ammonia water. The pretreatment solution is prepared and used immediately and should be used up within 30 minutes after preparation. S4. The TPE coating masterbatch obtained in step S2 is fed into a single-screw extruder and heated to melt. The temperatures of each zone are set as follows: Zone 1 160℃, Zone 2 170℃, Zone 3 180℃, and the die head 180℃. The coating is applied to the pretreated base fabric surface through a coat hanger-type T-die at a linear speed of 1.0 m / min. The coating is then combined and shaped with the rubber roller by controlling the air knife gap, so that the coating thickness is 0.12 mm. S5. The coated base fabric is sequentially cooled by three sets of cooling rollers. The temperature of the first set of cooling rollers is 30℃, the second set is 20℃, and the third set is 15℃. The total cooling time is 4 minutes. S6. Place the cooled and shaped fabric in a constant temperature oven and anneal it at 65°C for 1.5 hours to obtain a textile fabric with a TPE coating.

[0037] Example 2: This embodiment provides a textile fabric with a TPE coating, including a weight of 180 g / m². 2The base fabric has a TPE coating on its surface. By weight, the raw materials for preparing the TPE coating include: 55 parts polyethylene, 33 parts ethylene-vinyl acetate copolymer, 12 parts elastomer, 12 parts hot melt adhesive, 5 parts reactive nanocellulose whiskers, 3 parts functionalized graphene oxide, 1.2 parts lubricant, 0.6 parts antioxidant, and 0.4 parts light stabilizer.

[0038] The polyethylene is linear low-density polyethylene; the elastomer is a compound of thermoplastic elastomer and maleic anhydride-grafted polyolefin elastomer in a mass ratio of 3:1, and the thermoplastic elastomer is thermoplastic polyurethane elastomer; the hot melt adhesive is terpene phenol resin. The lubricant is oxidized polyethylene wax; the antioxidant is a compound of antioxidant 1010 and antioxidant 168 in a mass ratio of 1.2:1; the light stabilizer is UV-765.

[0039] The raw materials for preparing reactive nanocellulose whiskers, by weight, include: 85 parts nanocellulose whiskers, 12 parts KH-560, 120 parts deionized water, and 100 parts anhydrous ethanol.

[0040] The preparation method of reactive cellulose nanofibers includes the following steps: 1) Disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, and ultrasonically disperse for 30 min at an ultrasonic power of 300 W and a frequency of 40 kHz to form a uniform suspension. 2) Adjust the pH of the suspension obtained in step 1) to 4.5 with a 36% acetic acid solution, and add KH-560 dropwise at a uniform rate over 20 min, while keeping the mixture stirred at 500 r / min during the addition process; 3) The mixture obtained in step 2) was heated to 65°C and stirred at 500 r / min for 4 h. Then it was centrifuged at 6000 r / min for 12 min. The precipitate was washed 4 times with anhydrous ethanol and then freeze-dried at -40°C and vacuum degree ≤20 Pa for 26 h to obtain reactive nanocellulose whiskers.

[0041] The raw materials for preparing functionalized graphene oxide, by weight, include: 12 parts graphene oxide, 15 parts 1-butyl-3-methylimidazolium tetrafluoroborate, and 200 parts anhydrous ethanol.

[0042] The preparation method of functionalized graphene oxide includes the following steps: (1) Graphene oxide was dispersed in anhydrous ethanol, which accounted for 70% of the total amount of anhydrous ethanol. The ultrasonic power was 350W and the frequency was 40kHz. The ultrasonic dispersion was carried out for 30 minutes to obtain a graphene oxide dispersion. (2) Dissolve 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol to prepare an ionic liquid solution. Add the ionic liquid solution dropwise to the graphene oxide dispersion at a uniform rate over 20 min, while maintaining ultrasonic dispersion. (3) After the addition is complete, the temperature is raised to 70℃ and ultrasonic dispersion is continued for 3 hours. Then, the mixture is centrifuged at 6000 r / min for 12 minutes. The precipitate is washed three times with anhydrous ethanol and then vacuum dried at 60℃ and vacuum degree -0.085 MPa for 14 hours to obtain functionalized graphene oxide.

[0043] This embodiment also provides a method for preparing a textile fabric with a TPE coating, comprising the following steps: S1. Weigh out polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, lubricant, antioxidant, and light stabilizer according to the specified proportions, and place them separately in a vacuum drying oven. Vacuum dry for 4 hours at 95℃ and a vacuum degree of -0.085MPa, controlling the moisture content to ≤0.10wt%. S2. The dried components from step S1 are fed into a co-rotating twin-screw extruder for melt blending and granulation. The temperatures of each zone of the co-rotating twin-screw extruder are set as follows: Zone 1 155℃, Zone 2 175℃, Zone 3 185℃, Zone 4 188℃, Zone 5 185℃, and the die head temperature is 185℃. The screw speed is 320 r / min, and the melt blending time is 12 min. The extrudate is cooled in a water bath at 25℃, granulated, sieved through a 35-mesh vibrating screen, and then dried with hot air at 85℃ for 2.5 h to obtain TPE coating masterbatch. S3. Surface-activate the base fabric using a corona treatment machine with a power of 5kW and a speed of 12m / min, reducing the surface contact angle to below 45°. Then immerse the base fabric in the pretreatment solution at 30°C for 12 minutes. After removal, dry it with hot air at 120°C until the moisture content is ≤4wt%. The pretreatment solution consists of the following components: 100 parts deionized water, 1.5 parts KH-550, and 0.8 parts isomeric alcohol polyoxyethylene ether. The pH is adjusted to 9.0 with 25% ammonia water. The pretreatment solution is prepared and used immediately and should be used up within 30 minutes after preparation. S4. The TPE coating masterbatch obtained in step S2 is fed into a single-screw extruder and heated to melt. The temperatures of each zone are set as follows: Zone 1 170℃, Zone 2 180℃, Zone 3 188℃, and the die head 188℃. The coating is applied to the pretreated base fabric surface through a coat hanger-type T-die at a linear speed of 2.0 m / min. The coating is then combined and shaped with the rubber roller by controlling the air knife gap and pressing, so that the coating thickness is 0.18 mm. S5. The coated base fabric is sequentially cooled by three sets of cooling rollers. The temperature of the first set of cooling rollers is 35℃, the second set is 25℃, and the third set is 20℃. The total cooling time is 6 minutes. S6. Place the cooled and shaped fabric in a constant temperature oven and anneal at 70°C for 2.5 hours to obtain a textile fabric with a TPE coating.

[0044] Example 3: This embodiment provides a textile fabric with a TPE coating, including fabrics with a weight of 150 g / m². 2 The base fabric has a TPE coating on its surface. By weight, the raw materials for preparing the TPE coating include: 50 parts polyethylene, 30 parts ethylene-vinyl acetate copolymer, 10 parts elastomer, 10 parts hot melt adhesive, 3 parts reactive nanocellulose whiskers, 2 parts functionalized graphene oxide, 0.8 parts lubricant, 0.5 parts antioxidant, and 0.3 parts light stabilizer.

[0045] The polyethylene is linear low-density polyethylene; the elastomer is a compound of thermoplastic elastomer and maleic anhydride-grafted polyolefin elastomer in a mass ratio of 2.5:1, and the thermoplastic elastomer is a compound of hydrogenated styrene-butadiene block copolymer and thermoplastic polyurethane elastomer in a mass ratio of 1:1; the hot melt adhesive is hydrogenated C5 petroleum resin. The lubricant is polyethylene wax; the antioxidant is a compound of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1; the light stabilizer is UV-770.

[0046] The raw materials for preparing reactive nanocellulose whiskers, by weight, include: 80 parts nanocellulose whiskers, 10 parts KH-560, 110 parts deionized water, and 90 parts anhydrous ethanol.

[0047] The preparation method of reactive cellulose nanofibers includes the following steps: 1) Disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, and ultrasonically disperse for 25 min under ultrasonic power of 250W and frequency of 35kHz to form a uniform suspension. 2) Adjust the pH of the suspension obtained in step 1) to 4.0 with a 36% acetic acid solution, and add KH-560 dropwise at a uniform rate over 17 min, while keeping the mixture stirred at 450 r / min during the dropwise addition. 3) The mixture obtained in step 2) was heated to 60°C and stirred at 450 r / min for 3.5 h. Then it was centrifuged at 5500 r / min for 10 min. The precipitate was washed 4 times with anhydrous ethanol and then freeze-dried at -45°C and vacuum degree ≤20 Pa for 24 h to obtain reactive nanocellulose whiskers.

[0048] The raw materials for preparing functionalized graphene oxide, by weight, include: 10 parts graphene oxide, 12 parts 1-butyl-3-methylimidazolium tetrafluoroborate, and 175 parts anhydrous ethanol.

[0049] The preparation method of functionalized graphene oxide includes the following steps: (1) Graphene oxide was dispersed in anhydrous ethanol, which accounted for 65% of the total amount of anhydrous ethanol. The ultrasonic power was 300W and the frequency was 35kHz. The ultrasonic dispersion was carried out for 25 minutes to obtain a graphene oxide dispersion. (2) Dissolve 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol to prepare an ionic liquid solution. Add the ionic liquid solution dropwise to the graphene oxide dispersion at a uniform rate over 18 min, while maintaining ultrasonic dispersion. (3) After the addition is complete, the temperature is raised to 65℃ and ultrasonic dispersion is continued for 2.5h. Then, the mixture is centrifuged at 5500r / min for 10min. The precipitate is washed three times with anhydrous ethanol and then vacuum dried at 55℃ and vacuum degree -0.090MPa for 12h to obtain functionalized graphene oxide.

[0050] This embodiment also provides a method for preparing a textile fabric with a TPE coating, comprising the following steps: S1. Weigh out polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, lubricant, antioxidant, and light stabilizer according to the specified proportions, and place them separately in a vacuum drying oven. Vacuum dry for 3.5 hours at 90℃ and a vacuum degree of -0.090MPa, controlling the moisture content to ≤0.10wt%. S2. The dried components from step S1 are fed into a co-rotating twin-screw extruder for melt blending and granulation. The temperatures of each zone of the co-rotating twin-screw extruder are set as follows: Zone 1 150℃, Zone 2 170℃, Zone 3 180℃, Zone 4 185℃, Zone 5 182℃, and the die head temperature is 182℃; the screw speed is 270 r / min, and the melt blending time is 10 min; the extrudate is cooled in a water bath at 21℃, granulated, sieved through a 30-mesh vibrating screen, and then dried with hot air at 82℃ for 2 h to obtain TPE coating masterbatch; S3. Surface-activate the base fabric using a corona treatment machine with a power of 4kW and a speed of 10m / min, reducing the surface contact angle to below 45°. Then immerse the base fabric in the pretreatment solution at 28°C for 10 minutes, remove it, and dry it with hot air at 115°C until the moisture content is ≤4wt%. The pretreatment solution consists of the following components: 95 parts deionized water, 1.2 parts KH-550, and 0.6 parts isomeric alcohol polyoxyethylene ether. The pH is adjusted to 8.5 with 25% ammonia water. The pretreatment solution is prepared and used immediately and should be used up within 30 minutes after preparation. S4. The TPE coating masterbatch obtained in step S2 is fed into a single-screw extruder and heated to melt. The temperatures of each zone are set as follows: Zone 1 165℃, Zone 2 175℃, Zone 3 184℃, and the die head 184℃. The coating is applied to the pretreated base fabric surface through a coat hanger-type T-die at a linear speed of 1.5m / min. The coating is then combined and shaped with the rubber roller by controlling the air knife gap and pressing, so that the coating thickness is 0.15mm. S5. The coated base fabric is sequentially cooled by three sets of cooling rollers. The temperature of the first set of cooling rollers is 32℃, the second set is 22℃, and the third set is 17℃. The total cooling time is 5 minutes. S6. Place the cooled and shaped fabric in a constant temperature oven and anneal at 68°C for 2 hours to obtain a textile fabric with a TPE coating.

[0051] Comparative Example 1: A textile fabric with a TPE coating and its preparation method are disclosed, which differ from Example 3 only in that reactive nanocellulose whiskers are not added, but are replaced with an equal amount of linear low-density polyethylene.

[0052] Comparative Example 2: A textile fabric with a TPE coating and its preparation method are disclosed, which differ from Example 3 only in that functionalized graphene oxide is not added, but replaced with an equal amount of linear low-density polyethylene.

[0053] Comparative Example 3: A textile fabric with a TPE coating and its preparation method are disclosed, which differ from Example 3 only in that: no thermoplastic elastomer is added, and an equal amount of linear low-density polyethylene is used instead.

[0054] Comparative Example 4: A textile fabric with a TPE coating and its preparation method are disclosed, which differ from Example 3 only in that: ethylene-vinyl acetate copolymer is not added, but replaced with an equal amount of linear low-density polyethylene.

[0055] Comparative Example 5: A textile fabric with a TPE coating and its preparation method are disclosed, which differ from Example 3 only in that unmodified ordinary graphene oxide is used instead of functionalized graphene oxide.

[0056] Comparative Example 6: A textile fabric with a TPE coating and its preparation method are disclosed, the only difference between this fabric and Example 3 is that unmodified ordinary nanocellulose whiskers are used instead of reactive nanocellulose whiskers.

[0057] Comparative Example 7: A textile fabric with TPE coating and its preparation method are different from those in Example 3 only in that the base fabric is not pretreated (step S3 is omitted and the coating is applied directly).

[0058] Comparative Example 8: A textile fabric with a TPE coating and its preparation method differ from Example 3 only in that the annealing step (S6) is omitted, and the coating is directly wound up after cooling.

[0059] The textile fabrics obtained in Examples 1-3 and Comparative Examples 1-8 were subjected to the following performance tests, and the test methods are as follows: Hand feel softness: The bending length of the inclined plane heart-shaped method was determined according to the "Determination of Bending Properties of Textiles - Inclined Plane Method" (GB / T 18318-2001), and the average value was taken in combination with the sensory evaluation of a 5-person expert group (levels 1-5, with level 5 being the softest).

[0060] Elastic recovery rate: According to "Textiles - Tensile properties of fabrics - Part 2: Determination of elastic recovery rate at a constant elongation" (GB / T 3923.1-2013), the sample is stretched to 50% of a constant elongation, held for 1 minute, unloaded, and allowed to stand for 3 minutes before the recovery rate is measured.

[0061] Indentation recovery time: At room temperature (23±2℃), a cylindrical indenter with a diameter of 50mm and a mass of 500g is placed on the fabric surface and kept for 10s before being removed. The time (s) is measured to determine when the indentation recovers until the surface roughness change is ≤5% and there is no visible indentation.

[0062] Hydrostatic pressure resistance: Determined according to the standard "Test and Evaluation of Waterproof Performance of Textiles - Hydrostatic Pressure Method" (GB / T 4744-2013), and expressed as the hydrostatic pressure (kPa) that the sample can withstand.

[0063] Coating peel strength: Determined according to the "Test Method for Peel Strength of Soft Composite Materials" (GB / T 8808), with a sample width of 25 mm and peel strength unit of N / 25 mm.

[0064] Surface resistivity: Determined according to the "Test Method for Surface Resistivity of Clothing Antistatic Performance" (GB / T 22042-2008), using the ring electrode method, with a test voltage of 100V, and the result is expressed in ohms per square (Ω / sq).

[0065] Peel strength retention rate after washing: The coating was washed 20 times according to the "Domestic Washing and Drying Procedures for Textile Testing" (GB / T 8629-2017) using a type A washing machine, program 4N, standard detergent, and a washing temperature of 40℃. After each wash, the coating was centrifuged and hung to dry. The peel strength was then measured again, and the retention rate was calculated using the following formula: Retention rate = Peel strength after washing / Peel strength before washing × 100%.

[0066] The results are shown in Tables 2 and 3.

[0067] Table 2

[0068] Table 3

[0069] Using Example 3 as the control group, the performance differences and causes of Comparative Examples 1-8 are analyzed as follows: Comparative Example 1 (without reactive nanocellulose whiskers): Indentation recovery time increased from 8s to 16s (an increase of 100%), peel strength retention after washing decreased from 92% to 76% (a decrease of 17.4%), coating peel strength decreased from 9.5N / 25mm to 7.2N / 25mm (a decrease of 24.2%), hydrostatic pressure resistance decreased from 45kPa to 38kPa (a decrease of 15.6%), and hand feel softness decreased from grade 4.6 to grade 4.0. Reactive nanocellulose whiskers, through the synergistic effect of a rigid framework and interfacial chemical bonding, inhibit irreversible creep and slippage of the coating matrix molecular chains under pressure. Without this component, the coating lacks a rigid support structure, significantly reducing creep resistance and resulting in a doubling of indentation recovery time; furthermore, the reduced interfacial chemical bonding sites weaken the bond between the coating and the base fabric, exacerbating interfacial damage after repeated washing and significantly decreasing peel strength retention.

[0070] Comparative Example 2 (without functionalized graphene oxide): Hydrostatic pressure resistance decreased from 45 kPa to 34 kPa (a decrease of 24.4%), and surface resistivity decreased from 8.5 × 10⁻⁶. 8 Ω / sq increased to 3.8×10 12 The surface resistivity of the fabric increased significantly (Ω / sq), the antistatic properties disappeared, and the coating peel strength decreased from 9.5 N / 25 mm to 8.6 N / 25 mm (a decrease of 9.5%). Functionalized graphene oxide, after intercalation with ionic liquids, forms a uniformly dispersed two-dimensional sheet structure in a polyolefin matrix, creating a "maze effect" to block water molecule penetration. Without this component, the coating loses its continuous physical barrier, the water molecule penetration path is shortened, and the hydrostatic pressure resistance is significantly reduced. The loss of the conductive pathways formed by the overlapping functionalized graphene oxide sheets leads to a significant increase in surface resistivity and loss of antistatic function.

[0071] Comparative Example 3 (without thermoplastic elastomer): Elastic recovery rate decreased from 93% to 70% (a decrease of 24.7%), indentation recovery time increased from 8s to 38s (an increase of 375%), hand feel softness decreased from 4.6 to 3.0, coating peel strength decreased from 9.5N / 25mm to 7.8N / 25mm (a decrease of 17.9%), peel strength retention after washing decreased from 92% to 80% (a decrease of 13.0%), and hydrostatic pressure resistance decreased from 45kPa to 40kPa (a decrease of 11.1%). Thermoplastic elastomers, as a flexible phase, provide high elastic recovery capability, and their microphase separation structure or hydrogen-bonded physical cross-linking network is the main contributor to absorbing deformation energy. Without this component, coating rigidity increased significantly, elastic recovery rate decreased sharply, and indentation recovery time increased to 38s; moreover, the lack of elastomer's compliant buffer exacerbated interfacial stress concentration between the coating and the base fabric, leading to decreased interfacial stability after long-term use.

[0072] Comparative Example 4 (without ethylene-vinyl acetate copolymer): Hydrostatic pressure resistance decreased from 45 kPa to 24 kPa (a decrease of 46.7%), coating peel strength decreased from 9.5 N / 25 mm to 5.8 N / 25 mm (a decrease of 38.9%), peel strength retention after washing decreased from 92% to 68% (a decrease of 26.1%), indentation recovery time significantly increased from 8 s to 32 s, hand feel softness decreased from 4.6 to 3.3, and elastic recovery rate decreased from 93% to 78% (a decrease of 16.1%). Ethylene-vinyl acetate copolymer, acting as a polarity modifier and toughening compatibilizer, exhibits compatibility between its vinyl acetate segments and the ionic liquid and elastomer soft segments of functionalized graphene oxide, and its ethylene segments are compatible with polyethylene. This reduces interfacial tension and weakens the rigidity of the polyethylene crystalline region. When this component is missing, the polarity difference between the coating and the base fabric interface increases, the interfacial bonding force weakens sharply, and the hydrostatic pressure resistance drops by 46.7%. At the same time, the coating's flexibility decreases, elastic recovery is hindered, and the indentation recovery time is extended to 32 seconds.

[0073] Comparative Example 5 (replacing functionalized graphene oxide with unmodified ordinary graphene oxide): Hydrostatic pressure resistance decreased from 45 kPa to 30 kPa (a decrease of 33.3%), coating peel strength decreased from 9.5 N / 25 mm to 7.5 N / 25 mm (a decrease of 21.1%), indentation recovery time increased from 8 s to 11 s (an increase of 37.5%), peel strength retention after washing decreased from 92% to 79% (a decrease of 14.1%), and surface resistivity increased to 5.2 × 10⁻⁶. 10Ω / sq. The oxygen-containing groups on the surface of unmodified graphene oxide have poor compatibility with the polyolefin matrix, making it prone to agglomeration during melt processing. This makes it difficult to form a uniform and continuous two-dimensional barrier network, significantly weakening the labyrinth effect and resulting in a 33.3% decrease in hydrostatic pressure resistance. Furthermore, the lack of electrostatic stabilization from ionic liquids leads to uneven dispersion of graphene oxide in the matrix, increased internal defects in the coating, and decreased interfacial bonding strength. Simultaneously, the absence of stable electrostatic dissipation channels significantly reduces antistatic properties.

[0074] Comparative Example 6 (using unmodified ordinary nanocellulose whiskers instead of reactive nanocellulose whiskers): Indentation recovery time was significantly extended from 8s to 19s, coating peel strength decreased from 9.5N / 25mm to 6.8N / 25mm (a decrease of 28.4%), peel strength retention rate after washing decreased from 92% to 73% (a decrease of 20.7%), hand feel softness decreased from 4.6 to 4.0, and elastic recovery rate decreased from 93% to 87% (a decrease of 6.5%). Unmodified nanocellulose whiskers lack reactive functional groups such as epoxy groups on their surface, and cannot participate in the interfacial chemical reaction mediated by maleic anhydride-grafted polyolefin elastomer. They only have weak physical interactions with the polyolefin matrix, resulting in poor compatibility and easy agglomeration, which leads to limited rigidity enhancement. Furthermore, they cannot form chemical anchoring with the base fabric fibers, resulting in a significant reduction in interfacial bonding strength. The peel strength retention rate after washing decreased by 20.7%. At the same time, due to the lack of physical anchoring effect of whiskers, the coating's creep resistance decreased, and the indentation recovery time was extended to 19 seconds.

[0075] Comparative Example 7 (without base fabric pretreatment): The coating peel strength decreased from 9.5 N / 25 mm to 4.2 N / 25 mm (a decrease of 55.8%), the peel strength retention rate after washing decreased from 92% to 58% (a decrease of 37.0%), the indentation recovery time increased from 8 s to 15 s (an increase of 87.5%), the hand feel softness decreased from 4.6 to 3.9, the elastic recovery rate decreased from 93% to 88% (a decrease of 5.4%), and the hydrostatic pressure resistance decreased from 45 kPa to 40 kPa (a decrease of 11.1%). Base fabric pretreatment introduces active groups such as amino groups onto the fiber surface using γ-aminopropyltriethoxysilane. These groups can chemically react with the anhydride groups of maleic anhydride-grafted polyolefin elastomers and the epoxy groups of reactive nanocellulose whiskers, forming a continuous chemical bond chain from the inside of the coating to the surface of the base fabric. Omitting this step results in a lack of active reaction sites on the base fabric surface, preventing the coating from forming a chemical anchor with the base fabric. Instead, the coating relies solely on physical adsorption, leading to a 55.8% decrease in interfacial bonding strength. After prolonged washing, the interfacial failure becomes severe, with the peel strength retention rate dropping to 58%. Furthermore, the weak interfacial bonding causes the coating to slip under pressure, prolonging the indentation recovery time.

[0076] Comparative Example 8 (annealing treatment omitted): The hydrostatic pressure resistance decreased from 45 kPa to 36 kPa (a decrease of 20.0%), the peel strength retention rate after water washing decreased from 92% to 85% (a decrease of 7.6%), the coating peel strength decreased from 9.5 N / 25 mm to 9.0 N / 25 mm (a decrease of 5.3%), and the indentation recovery time increased from 8 s to 12 s (an increase of 50%). Annealing at 65–70℃ falls within the optimal crystallization temperature range for polyethylene / ethylene-vinyl acetate copolymer, promoting the melting and recrystallization of incomplete wafers, improving the crystal structure, reducing grain boundary defects, and enhancing coating density. Omitting this step resulted in more internal grain boundary defects in the coating, unresolved processing stress, and a tendency to generate microcracks, leading to reduced water molecule penetration resistance and a decrease in hydrostatic pressure resistance of approximately 20%. Simultaneously, the presence of internal stress slightly reduced the long-term interfacial stability.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A textile fabric with a TPE coating, characterized in that, The product includes a base fabric, the surface of which is coated with a TPE coating. By weight, the raw materials for preparing the TPE coating include: 45-55 parts of polyethylene, 27-33 parts of ethylene-vinyl acetate copolymer, 8-12 parts of elastomer, 8-12 parts of hot melt adhesive, 2-5 parts of reactive nanocellulose whiskers, 1-3 parts of functionalized graphene oxide, and 1.0-2.2 parts of processing stabilizer.

2. The textile fabric with TPE coating according to claim 1, characterized in that, The processing stabilizer is composed of the following components in parts by weight: 0.5 to 1.2 parts lubricant, 0.3 to 0.6 parts antioxidant, and 0.2 to 0.4 parts light stabilizer.

3. The textile fabric with TPE coating according to claim 1, characterized in that, The polyethylene is low-density polyethylene or linear low-density polyethylene; the elastomer is compounded from a thermoplastic elastomer and a maleic anhydride-grafted polyolefin elastomer at a mass ratio of 2 to 3:1, and the thermoplastic elastomer is at least one of hydrogenated styrene-butadiene block copolymer or thermoplastic polyurethane elastomer; the hot melt adhesive is hydrogenated C5 petroleum resin or terpene phenol resin.

4. The textile fabric with TPE coating according to claim 2, characterized in that, The lubricant is polyethylene wax or oxidized polyethylene wax; the antioxidant is a compound of antioxidant 1010 and antioxidant 168 in a mass ratio of 0.8 to 1.2:

1.

5. The textile fabric with a TPE coating according to claim 1, characterized in that, The raw materials for preparing the reactive nanocellulose whiskers, by weight, include: 75-85 parts of nanocellulose whiskers, 8-12 parts of γ-glycidyl etheroxypropyltrimethoxysilane, 100-120 parts of deionized water, and 80-100 parts of anhydrous ethanol.

6. The textile fabric with a TPE coating according to claim 5, characterized in that, The method for preparing the reactive cellulose nanofibers includes the following steps: 1) Disperse nanocellulose whiskers in a mixture of deionized water and anhydrous ethanol, and ultrasonically disperse for 20-30 minutes under ultrasonic power of 200-300W and frequency of 30-40kHz to form a uniform suspension. 2) Adjust the pH of the suspension obtained in step 1) to 3.5-4.5 with acetic acid solution, and add γ-glycidoxypropyltrimethoxysilane dropwise at a constant rate over 15-20 min, while stirring at a speed of 400-500 r / min during the dropwise addition. 3) Heat the mixture obtained in step 2) to 55-65℃ and stir at 400-500 r / min for 3-4 h. Then centrifuge at 5000-6000 r / min for 8-12 min. Wash the precipitate with anhydrous ethanol 3-4 times and freeze-dry for 22-26 h to obtain reactive nanocellulose whiskers.

7. The textile fabric with a TPE coating according to claim 1, characterized in that, The raw materials for preparing the functionalized graphene oxide, by weight, include: 8-12 parts of graphene oxide, 10-15 parts of 1-butyl-3-methylimidazolium tetrafluoroborate, and 150-200 parts of anhydrous ethanol.

8. The textile fabric with a TPE coating according to claim 7, characterized in that, The preparation method of the functionalized graphene oxide includes the following steps: (1) Graphene oxide is dispersed in anhydrous ethanol, which accounts for 60-70% of the total amount of anhydrous ethanol, to obtain a graphene oxide dispersion. (2) Dissolve 1-butyl-3-methylimidazolium tetrafluoroborate in the remaining anhydrous ethanol to prepare an ionic liquid solution. Add the ionic liquid solution dropwise to the graphene oxide dispersion at a uniform rate over 15-20 min, while maintaining ultrasonic dispersion. (3) After the addition is complete, the temperature is raised to 60-70℃ and ultrasonic dispersion is continued for 2-3 hours. Then, the mixture is centrifuged at 5000-6000 r / min for 8-12 minutes. The precipitate is washed 2-3 times with anhydrous ethanol and then vacuum dried for 10-14 hours to obtain functionalized graphene oxide.

9. A method for preparing a textile fabric with a TPE coating as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Weigh out polyethylene, ethylene-vinyl acetate copolymer, elastomer, hot melt adhesive, reactive nanocellulose whiskers, functionalized graphene oxide, and processing stabilizer according to the specified proportions, and place them separately in a vacuum drying oven. Vacuum dry for 3-4 hours, controlling the moisture content to ≤0.10wt%. S2. The dried components are fed into a co-rotating twin-screw extruder for melt blending and granulation. The extrudate is cooled in a water bath at a temperature of 18-25°C, granulated, and sieved through a 25-35 mesh vibrating screen. Then, it is dried with hot air at 80-85°C for 1.5-2.5 hours to obtain TPE coating masterbatch. S3. Surface-activate the base fabric using a corona treatment machine, then immerse the base fabric in the pretreatment solution at 25–30°C for 8–12 minutes. After removal, dry it with hot air at 110–120°C until the moisture content is ≤4 wt%. S4. The TPE coating masterbatch obtained in step S2 is fed into a single-screw extrusion coating machine, heated to melt, and extruded through a coat hanger-type T-die at a linear speed of 1.0 to 2.0 m / min to coat the pretreated base fabric surface. The coating is then combined and shaped with a rubber roller by controlling the air knife gap to achieve a coating thickness of 0.12 to 0.18 mm. S5. The coated base fabric is sequentially cooled by three sets of cooling rollers. The temperature of the first set of cooling rollers is 30-35℃, the second set is 20-25℃, and the third set is 15-20℃. The total cooling time is 4-6 minutes. S6. Place the cooled and shaped fabric in a constant temperature oven and anneal it at 65-70℃ for 1.5-2.5 hours to obtain a textile fabric with a TPE coating.

10. The method for preparing a textile fabric with a TPE coating according to claim 9, characterized in that, In step S2, the temperatures of each zone of the co-rotating twin-screw extruder are set as follows: Zone 1 145-155℃, Zone 2 165-175℃, Zone 3 175-185℃, Zone 4 183-188℃, Zone 5 180-185℃, and the die head temperature 180-185℃; the screw speed is 220-320 r / min, and the melt blending time is 8-12 min.

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