Windproof and waterproof textile fabric and preparation method thereof

Abstract

The application discloses a windproof and waterproof textile fabric and a preparation method thereof. In the application, a TiO2-SiO2 composite nano network layer is constructed on a fiber surface in situ through hydrothermal treatment, a silane coupling agent with a specific carbon chain length is grafted through a covalent bond, and a stable organic-inorganic hybrid protective layer is formed on the surface of the textile fiber substrate by adopting a gradient temperature curing process. The protective layer has micro-nano roughness, porous water vapor channels and low surface energy hydrophobic characteristics, so that the obtained fabric can realize efficient waterproof and windproof while maintaining good moisture permeability and washing resistance, and meets the use requirement of outdoor sports clothes on high-performance and environmentally-friendly functional fabric.

Description

Technical Field

[0001] This invention relates to the field of functional textile fabric technology, specifically to a windproof and waterproof textile fabric and its preparation method. Background Technology

[0002] With the increasing popularity of outdoor sports and the improvement of people's living standards, the demand for windproof and waterproof textiles in outdoor clothing, sports equipment, and protective gear is growing. Traditionally, to achieve waterproofing, the industry widely employs finishing technologies based on perfluorinated or polyfluoroalkyl substances (PFAS), utilizing the ultra-low surface energy of fluorinated segments to impart excellent water and oil repellency. However, PFAS substances exhibit extremely high stability in the natural environment, are difficult to degrade, and can accumulate in organisms through the food chain, posing a potential threat to human health and the ecological environment. In light of this, environmental regulations worldwide are becoming increasingly stringent. The European Union has imposed restrictions on fluorinated textiles, and my country has included PFAS in its list of key controlled new pollutants. Therefore, developing environmentally friendly, multifunctional fabrics free of PFAS has become an urgent need in the industry.

[0003] While some existing fluorine-free waterproofing technologies can achieve a certain level of waterproofing, they often struggle to simultaneously maintain good windproofness, breathability, and washability. This is especially true after multiple washes, where the degradation of waterproofing and breathability becomes particularly noticeable, failing to meet the high performance standards required for outdoor sportswear. How to achieve high-level waterproofing, windproofing, excellent breathability, and washability in fabrics without relying on PFAS is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, the present invention aims to provide a method for preparing windproof and waterproof textile fabric. The fabric prepared by this method can achieve high-efficiency waterproofing and windproofing while maintaining good moisture permeability and washability.

[0005] This invention is achieved through the following technical solution:

[0006] In a first aspect, the present invention provides a method for preparing a windproof and waterproof textile fabric, comprising the following steps:

[0007] S1. Pre-treat the textile fiber substrate to remove surface impurities;

[0008] S2. Dissolve the titanate precursor in anhydrous ethanol and stir to form a transparent solution, wherein the concentration of the titanate precursor is 0.1-2 mol / L; add nano-SiO2 and continue stirring for 5-20 min; then add deionized water and acetic acid and continue stirring for 20-40 min to obtain the titanate-nano-SiO2 composite precursor treatment solution.

[0009] S3. Place the pretreated textile fiber substrate in a closed reactor and immerse it in the titanate-nano SiO2 composite precursor treatment solution, and perform hydrothermal treatment at 90-100℃ for 3-5 h.

[0010] S4. Place the textile fiber substrate after hydrothermal treatment in step S3 in dilute ammonia water with pH 8-9, ultrasonically clean for 5-20 minutes, then rinse with deionized water, and dry at 70-90℃ for later use.

[0011] S5. Dissolve the long-chain alkylsilane coupling agent in anhydrous ethanol, add deionized water and catalyst, stir and hydrolyze for 30-60 min to obtain the grafting solution, wherein the concentration of the long-chain alkylsilane coupling agent is 1-5 wt%.

[0012] S6. Immerse the cleaned and dried textile fiber substrate from step S4 into the grafting solution prepared in step S5 and react at 60-80℃ for 2-5 h. After the reaction, pre-cure and dry at 80-100℃ for 10-30 min. Then bake and cure at 140-160℃ for 1-3 min to obtain the windproof and waterproof textile fabric.

[0013] Furthermore, the pretreatment in step S1 involves alternating ultrasonic cleaning of the textile fiber substrate with deionized water and anhydrous ethanol for 5-15 minutes each time, followed by drying at 60-80°C for later use. This pretreatment removes impurities from the surface of the textile fiber substrate, exposing abundant active groups on the fiber surface. This provides a clean, highly active interface for the subsequent in-situ growth of the nanonetwork, thereby enhancing the adhesion between the coating and the fiber.

[0014] Further, in step S1, the textile fiber substrate is a knitted polyester fabric, a knitted nylon fabric, or a blended fabric thereof, with a basis weight of 80-150 g / m². 2 .

[0015] Further, in step S2, the titanate precursor is selected from at least one of tetraethyl titanate, tetraisopropyl titanate, and tetrabutyl titanate.

[0016] This invention prepares a titanate-nano SiO2 composite precursor treatment solution by adding nano-SiO2 to a titanate precursor treatment solution. A TiO2-SiO2 composite nanonetwork layer is then constructed in situ on the fiber surface via hydrothermal treatment. This not only provides the micro-nano roughness framework required for subsequent hydrophobic modification, but its three-dimensional porous structure also provides channels for the diffusion of water vapor molecules. Simultaneously, the introduced nano-SiO2 surface is rich in silanol groups, forming localized hydrophilic microregions, which facilitates the adsorption and rapid transport of water vapor. Preferably, in step S2, the average particle size of the nano-SiO2 is 10-50 nm, and the amount added is 2-8 wt% of the titanate precursor mass.

[0017] Furthermore, the nano-SiO2 is pre-activated before being added; the pre-activation treatment involves dispersing the nano-SiO2 in a 3-8 wt% hydrochloric acid aqueous solution, ultrasonicating for 20-40 min, washing with deionized water until neutral, and then drying. Preferably, the drying temperature is 90-110℃.

[0018] Further, in step S2, the amount of deionized water added is 5-20 wt% of the titanate precursor.

[0019] Further, in step S2, the acetic acid is an aqueous solution of acetic acid with a concentration of 0.5-2 mol / L, and the amount added is to adjust the pH of the system to 2-6.

[0020] Further, in step S5, the long-chain alkylsilane coupling agent is R. 1 -Si(OCH3)3、R 2 At least one of -Si(OCH2CH3)3, wherein R 1 R 2 Each is independently selected from straight-chain alkyl groups having 10-18 carbon atoms. Preferably, R 1 R 2 Each is independently selected from straight-chain alkyl groups having 12-16 carbon atoms.

[0021] Furthermore, in step S5, the amount of deionized water added is 2-10 times the mass of the long-chain alkylsilane coupling agent.

[0022] Further, in step S5, the catalyst is concentrated ammonia water with a concentration of 25-28 wt%; the amount of catalyst added is such that the pH of the grafting solution is 8-9.

[0023] Secondly, the present invention provides a windproof and waterproof textile fabric, which is prepared by the preparation method described in the first aspect.

[0024] Thirdly, this invention provides the application of the aforementioned windproof and waterproof textile fabric in the manufacture of outdoor clothing, outdoor sports equipment, or outdoor protective gear. Specifically, examples include windbreakers and raincoats.

[0025] The present invention has the following beneficial effects:

[0026] This invention first constructs a TiO2-SiO2 composite nanonetwork layer in situ on the fiber surface through hydrothermal treatment, then covalently grafts a silane coupling agent with a specific carbon chain length, and employs a gradient temperature curing process to form a stable organic-inorganic hybrid protective layer on the surface of the textile fiber substrate. This protective layer combines micro-nano roughness, porous water vapor channels, and low surface energy hydrophobic properties, enabling the obtained fabric to achieve highly efficient waterproofing and windproofing while maintaining good moisture permeability and washability (air permeability ≤35 mm / s, moisture permeability ≥6000 g / (m²)). 2 (24h), and the static water contact angle is still ≥145° after washing test, which meets the requirements of outdoor sportswear for high-performance environmentally friendly functional fabrics. Detailed Implementation

[0027] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0028] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0029] Unless otherwise specified, room temperature or normal temperature in the embodiments of the present invention refers to 25±1℃.

[0030] Example 1

[0031] This embodiment provides a windproof and waterproof textile fabric, the preparation method of which is as follows:

[0032] (1) The textile fiber base (knitted polyester fabric, weight 110 g / m²) 2 (The sample was cut into 20 cm × 20 cm pieces) and ultrasonically cleaned twice with deionized water and anhydrous ethanol, 10 min each time, to remove surface oil and impurities; then dried in an oven at 80℃ for 2 h for later use.

[0033] (2) Disperse 5 g of nano-SiO2 (average particle size 20 nm) in 100 mL of 5 wt% hydrochloric acid aqueous solution, sonicate for 30 min, then wash with deionized water until neutral, and dry at 100℃ for later use.

[0034] (3) Dissolve 20 mL of tetrabutyl titanate (about 0.059 mol, density about 1.0 g / mL) in 180 mL of anhydrous ethanol and stir for 10 min to form a transparent solution; add 0.5 g of pre-activated nano SiO2 and continue stirring for 10 min; then add 2 mL of deionized water and acetic acid aqueous solution (1 mol / L) dropwise until the pH is about 4, and continue stirring for 30 min to obtain titanate-nano SiO2 composite precursor treatment solution;

[0035] (4) The pretreated textile fiber substrate was immersed in the titanate-nano SiO2 composite precursor treatment solution, transferred to a high-pressure reactor and sealed, and placed in an oven for hydrothermal treatment at 100°C for 4 h.

[0036] (5) Place the hydrothermally treated textile fiber substrate in dilute ammonia water (pH 8-9), ultrasonically clean for 10 min, then rinse twice with deionized water, and dry at 80℃ for later use.

[0037] (6) Dissolve 0.5 g of hexadecyltrimethoxysilane in 50 mL of anhydrous ethanol, add 2 mL of deionized water and 0.1 mL of ammonia (concentration 25-28 wt%), stir and hydrolyze for 30 min to obtain the grafting solution with a pH of about 8.5;

[0038] (7) Immerse the cleaned and dried textile fiber substrate in step (5) into the grafting treatment solution and react at 60°C for 4 hours. After the reaction, pre-dry in an oven at 80°C for 20 minutes. Then bake and cure at 150°C for 2 minutes to prepare windproof and waterproof textile fabric.

[0039] Example 2

[0040] This embodiment provides a windproof and waterproof textile fabric, the preparation method of which is as follows:

[0041] (1) The textile fiber base (knitted polyester fabric, weight 110 g / m²) 2 (The sample was cut into 20 cm × 20 cm pieces) and ultrasonically cleaned twice with deionized water and anhydrous ethanol, 10 min each time, to remove surface oil and impurities; then dried in an oven at 80℃ for 2 h for later use.

[0042] (2) Disperse 5 g of nano-SiO2 (average particle size 45 nm) in 100 mL of 5 wt% hydrochloric acid aqueous solution, sonicate for 30 min, then wash with deionized water until neutral, and dry at 100℃ for later use.

[0043] (3) Dissolve 15 mL of tetrabutyl titanate (about 0.044 mol, density about 1.0 g / mL) in 185 mL of anhydrous ethanol and stir for 10 min to form a transparent solution; add 0.8 g of pre-activated nano SiO2 and continue stirring for 10 min; then add 1.5 mL of deionized water and acetic acid aqueous solution (1 mol / L) dropwise until the pH is about 4, and continue stirring for 30 min to obtain titanate-nano SiO2 composite precursor treatment solution;

[0044] (4) The pretreated textile fiber substrate was immersed in the titanate-nano SiO2 composite precursor treatment solution, transferred to a high-pressure reactor and sealed, and placed in an oven for hydrothermal treatment at 90°C for 5 h.

[0045] (5) Place the hydrothermally treated textile fiber substrate in dilute ammonia water (pH 8-9), ultrasonically clean for 10 min, then rinse twice with deionized water, and dry at 80℃ for later use.

[0046] (6) Dissolve 0.5 g of dodecyltrimethoxysilane in 50 mL of anhydrous ethanol, add 2 mL of deionized water and 0.1 mL of ammonia (concentration 25-28 wt%), stir and hydrolyze for 30 min to obtain the grafting solution with a pH of about 8.5;

[0047] (7) Immerse the cleaned and dried textile fiber substrate in step (5) into the grafting treatment solution and react at 80°C for 3 hours. After the reaction is completed, pre-dry in an oven at 100°C for 20 minutes. Then bake and cure at 150°C for 2 minutes to prepare windproof and waterproof textile fabric.

[0048] Example 3

[0049] This embodiment provides a windproof and waterproof textile fabric. The only difference between this fabric and the one in Example 1 is that the long-chain alkylsilane coupling agent used in step (6) is octadecyltrimethoxysilane. The other steps are the same as in Example 1.

[0050] Comparative Example 1

[0051] This comparative example provides a functional textile fabric whose preparation method differs from that of Example 1 only in that the long-chain alkylsilane coupling agent used in step (6) is octyltrimethoxysilane, and the remaining steps are the same as those in Example 1.

[0052] Comparative Example 2

[0053] This comparative example provides a functional textile fabric, the preparation method of which is as follows:

[0054] (1) The textile fiber base (knitted polyester fabric, weight 110 g / m²) 2(The sample was cut into 20 cm × 20 cm pieces) and ultrasonically cleaned twice with deionized water and anhydrous ethanol, 10 min each time, to remove surface oil and impurities; then dried in an oven at 80℃ for 2 h for later use.

[0055] (2) Dissolve 20 mL of tetrabutyl titanate (about 0.059 mol, density about 1.0 g / mL) in 180 mL of anhydrous ethanol and stir for 10 min to form a transparent solution; then add 2 mL of deionized water and acetic acid aqueous solution (1 mol / L) until the pH is about 4, and continue stirring for 30 min to obtain titanate precursor treatment solution;

[0056] (3) The pretreated textile fiber substrate is immersed in the titanate precursor treatment solution, transferred to a high-pressure reactor and sealed, and placed in an oven for hydrothermal treatment at 100°C for 4 h.

[0057] (4) Place the hydrothermally treated textile fiber substrate in dilute ammonia water (pH 8-9), ultrasonically clean for 10 min, then rinse twice with deionized water, and dry at 80℃ for later use.

[0058] (5) Dissolve 0.5 g of hexadecyltrimethoxysilane in 50 mL of anhydrous ethanol, add 2 mL of deionized water and 0.1 mL of ammonia (concentration 25-28 wt%), stir and hydrolyze for 30 min to obtain the grafting solution with a pH of about 8.5;

[0059] (6) Immerse the cleaned and dried textile fiber substrate in step (4) into the grafting treatment solution and react at 60°C for 4 hours. After the reaction is completed, pre-dry in an oven at 80°C for 20 minutes. Then bake and cure at 150°C for 2 minutes to prepare the functional textile fabric.

[0060] Comparative Example 3

[0061] This comparative example provides a functional textile fabric whose preparation method differs from that of Example 1 only in that the amount of nano-SiO2 added in step (3) is 3g, and the remaining steps are the same as those in Example 1.

[0062] Comparative Example 4

[0063] This comparative example provides a functional textile fabric, the preparation method of which is as follows:

[0064] (1) The textile fiber base (knitted polyester fabric, weight 110 g / m²) 2 (The sample was cut into 20 cm × 20 cm pieces) and ultrasonically cleaned twice with deionized water and anhydrous ethanol, 10 min each time, to remove surface oil and impurities; then dried in an oven at 80℃ for 2 h for later use.

[0065] (2) Disperse 5 g of nano-SiO2 (average particle size 20 nm) in 100 mL of 5 wt% hydrochloric acid aqueous solution, sonicate for 30 min, then wash with deionized water until neutral, and dry at 100℃ for later use.

[0066] (3) Dissolve 20 mL of tetrabutyl titanate (about 0.059 mol, density about 1.0 g / mL) in 180 mL of anhydrous ethanol and stir for 10 min to form a transparent solution; add 0.5 g of pre-activated nano SiO2 and continue stirring for 10 min; then add 2 mL of deionized water and acetic acid aqueous solution (1 mol / L) dropwise until the pH is about 4, and continue stirring for 30 min to obtain titanate-nano SiO2 composite precursor treatment solution;

[0067] (4) The pretreated textile fiber substrate was immersed in the titanate-nano SiO2 composite precursor treatment solution, transferred to a high-pressure reactor and sealed, and placed in an oven for hydrothermal treatment at 100°C for 4 h.

[0068] (5) Dissolve 0.5 g of hexadecyltrimethoxysilane in 50 mL of anhydrous ethanol, add 2 mL of deionized water and 0.1 mL of ammonia (concentration 25-28 wt%), stir and hydrolyze for 30 min to obtain the grafting solution with a pH of about 8.5;

[0069] (6) The textile fiber substrate after hydrothermal treatment in step (4) is immersed in the grafting solution and reacted at 60°C for 4 hours. After the reaction is completed, it is pre-cured and dried in an oven at 80°C for 20 minutes. Then it is baked and cured at 150°C for 2 minutes to obtain the functional textile fabric.

[0070] Comparative Example 5

[0071] This comparative example provides a functional textile fabric, the preparation method of which is as follows:

[0072] Steps (1) to (6) are the same as in Example 1.

[0073] (7) Immerse the cleaned and dried textile fiber substrate in step (5) into the grafting treatment solution and react at 60°C for 4 hours. After the reaction is completed, pre-dry in an oven at 80°C for 20 minutes to prepare the functional textile fabric.

[0074] Comparative Example 6

[0075] This comparative example provides a functional textile fabric, the preparation method of which is as follows:

[0076] Steps (1) to (6) are the same as in Example 1.

[0077] (7) Immerse the cleaned and dried textile fiber substrate in step (5) into the grafting treatment solution and react at 60°C for 4 hours; after the reaction is completed, bake and cure at 150°C for 2 minutes to prepare the functional textile fabric.

[0078] The fabrics obtained in Examples 1-3 and Comparative Examples 1-6 were subjected to the following performance tests.

[0079] Relevant performance testing methods:

[0080] 1. Hydrostatic pressure

[0081] The test was conducted according to AATCC 127 standard. A hydrostatic pressure tester was used, and the effective test area of ​​the sample was 100 cm². 2 The pressure was increased at a rate of 6 kPa / min until the third water droplet appeared on the sample surface, and the pressure value (kPa) at this point was recorded. Each sample was tested 5 times, and the average value was taken.

[0082] 2. Static water contact angle

[0083] The test was conducted using a contact angle meter (such as DataPhysics OCA15EC). The fabric sample was flattened and fixed on the stage, and 2 μL of deionized water was added. The contact angle was measured using the seated drop method. Five different locations were tested for each sample, and the average value was calculated.

[0084] 3. Washing test

[0085] The procedure was performed according to AATCC 61 standard. Fabric samples were placed in a washing test tank along with a standard detergent (AATCC 1993 standard detergent WOB). A cycle was completed by washing at 49°C for 45 minutes, equivalent to 5 washes in a household washing machine. Four cycles were repeated (equivalent to 20 washes). After washing, the samples were removed, dried in a 60°C oven, and then the static water contact angle was measured.

[0086] 4. Breathability

[0087] The test was conducted in accordance with GB / T 5453 standard. An air permeability tester was used, with a test pressure difference of 100 Pa and a test area of ​​20 cm². 2 The air velocity (mm / s) passing through the fabric sample was measured; each sample was tested 5 times, and the average value was taken. The lower the air permeability, the better the windproof performance.

[0088] 5. Moisture permeability

[0089] The procedure was performed according to GB / T 12704.1-2009. The fabric sample was placed on a moisture permeability cup containing desiccant (anhydrous calcium chloride) and then placed in a constant temperature and humidity chamber at 38℃ and 90% relative humidity. The mass change of water vapor passing through the sample was measured over one hour, and the moisture permeability (g / (m²)) was calculated.2 • 24h). Each sample was tested 3 times, and the average value was taken.

[0090] Table 1: Performance test results of fabrics prepared in the examples and comparative examples

[0091] The results show that this invention first constructs a TiO2-SiO2 composite nanonetwork layer in situ on the fiber surface through hydrothermal treatment, then covalently grafts a silane coupling agent with a specific carbon chain length, and employs a gradient temperature curing process to achieve a windproof and waterproof textile fabric that balances good moisture permeability and washability, with an air permeability ≤35 mm / s and a moisture permeability ≥6000 g / (m²). 2 • 24h), and after washing, the static water contact angle is still ≥145°, which can meet the needs of outdoor sportswear for high-performance environmentally friendly functional fabrics.

[0092] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for preparing a windproof and waterproof textile fabric, characterized in that, Includes the following steps: S1. Pre-treat the textile fiber substrate to remove surface impurities; S2. Dissolve the titanate precursor in anhydrous ethanol and stir to form a transparent solution, wherein the concentration of the titanate precursor is 0.1-2 mol / L; add nano-SiO2 and continue stirring for 5-20 min; then add deionized water and acetic acid and continue stirring for 20-40 min to obtain the titanate-nano-SiO2 composite precursor treatment solution. S3. Place the pretreated textile fiber substrate in a closed reactor and immerse it in the titanate-nano SiO2 composite precursor treatment solution, and perform hydrothermal treatment at 90-100℃ for 3-5 h. S4. Place the textile fiber substrate after hydrothermal treatment in step S3 in dilute ammonia water with pH 8-9, ultrasonically clean for 5-20 minutes, then rinse with deionized water, and dry at 70-90℃ for later use. S5. Dissolve the long-chain alkylsilane coupling agent in anhydrous ethanol, add deionized water and catalyst, stir and hydrolyze for 30-60 min to obtain the grafting solution, wherein the concentration of the long-chain alkylsilane coupling agent is 1-5 wt%. S6. Immerse the cleaned and dried textile fiber substrate from step S4 into the grafting solution prepared in step S5 and react at 60-80℃ for 2-5 h. After the reaction, pre-cure and dry at 80-100℃ for 10-30 min. Then bake and cure at 140-160℃ for 1-3 min to obtain the windproof and waterproof textile fabric.

2. The preparation method according to claim 1, characterized in that, The pretreatment in step S1 involves ultrasonically cleaning the textile fiber substrate alternately with deionized water and anhydrous ethanol for 5-15 minutes each time, and then drying it at 60-80℃ for later use.

3. The preparation method according to claim 1, characterized in that, In step S2, the titanate precursor is selected from at least one of tetraethyl titanate, tetraisopropyl titanate, and tetrabutyl titanate; the average particle size of the nano-SiO2 is 10-50 nm, and the amount added is 2-8 wt% of the titanate precursor; the amount of deionized water added is 5-20 wt% of the titanate precursor; the acetic acid is an aqueous solution of acetic acid with a concentration of 0.5-2 mol / L, and the amount added is to adjust the pH of the system to 2-6.

4. The preparation method according to claim 1, characterized in that, In step S2, the nano-SiO2 is pre-activated before being added; the pre-activation treatment is to disperse the nano-SiO2 in a 3-8 wt% hydrochloric acid aqueous solution, sonicate for 20-40 min, wash with deionized water until neutral, and then dry.

5. The preparation method according to claim 1, characterized in that, In step S5, the long-chain alkylsilane coupling agent is R. 1 -Si(OCH3)3、R 2 At least one of -Si(OCH2CH3)3, wherein R 1 R 2 Each is independently selected from straight-chain alkyl groups with 10-18 carbon atoms.

6. The preparation method according to claim 5, characterized in that, R 1 R 2 Each is independently selected from straight-chain alkyl groups having 12-16 carbon atoms.

7. The preparation method according to claim 1, characterized in that, In step S5, the amount of deionized water added is 2-10 times the mass of the long-chain alkylsilane coupling agent.

8. The preparation method according to claim 1, characterized in that, In step S5, the catalyst is concentrated ammonia water with a concentration of 25-28 wt%; the amount of catalyst added is such that the pH of the grafting solution is 8-9.

9. A windproof and waterproof textile fabric, characterized in that, It is prepared by the preparation method according to any one of claims 1-8.

10. The application of the windproof and waterproof textile fabric according to claim 9 in the preparation of outdoor clothing, outdoor sports equipment or outdoor protective products.

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