Waterproof anti-ultraviolet woven fiber coating and preparation method thereof

Abstract

The invention provides a waterproof and uvioresistant woven fiber coating and a preparation method thereof, and belongs to the technical field of fabrics. The invention relates to a sponge bone needle coating which is prepared from the following components: waterborne polyurethane, 3-glycidoxypropyltrimethoxysilane, nano titanium dioxide, diatomite, fumed silica and a sponge bone needle. The preparation method comprises the steps of inorganic material modification and polyurethane coating mixing. Through triple mechanisms of hydrophobicity of the waterborne polyurethane base material, modification of the inorganic filler and photoprotection of the nano titanium dioxide, excellent waterproof and anti-ultraviolet properties are realized. The hydrostatic pressure resistance is high, the interface bonding is strong, and the durability is good; broad-spectrum shielding is achieved in the aspect of ultraviolet resistance, the weather resistance is high, and the fitting degree with fibers is high.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics, and in particular relates to a waterproof and UV-resistant woven fiber coating and a preparation method thereof. Background Art

[0002] In recent years, with the increasing popularity of outdoor activities and demand for health protection, fabrics with both waterproof and UV resistance have become a research hotspot in the textile industry. These fabrics strike a balance between protection and comfort by integrating multiple mechanisms, including physical barrier, chemical absorption, and intelligent regulation. Currently, there are several directions for enhancing fabrics' waterproof and UV resistance:

[0003] 1. Coating Technology: Coating technology was the first mainstream method to achieve waterproof and UV resistance. It forms a protective layer by coating functional materials on the fabric surface. Common coating types include waterborne polyurethane (WPU) coatings and inorganic / organic composite coatings. For example, polar groups (such as amino and carboxyl groups) in WPU molecules can form a dense waterproof film. At the same time, the addition of inorganic UV shielding agents such as nano-titanium dioxide (TiO2) or zinc oxide (ZnO) utilizes their high refractive index to reflect or scatter UV rays.

[0004] 2. Nanomaterial Composites: The introduction of nanomaterials significantly enhances fabrics' UV resistance. For example, nano-titanium dioxide (TiO2) and zinc oxide (ZnO) absorb UV rays and convert them into heat, while simultaneously reflecting the remaining radiation, providing dual protection. Additionally, nano-silver (Ag) and gold (Au) particles are used to reflect UV rays due to their high reflectivity, but these are relatively expensive and are primarily used in high-end outdoor equipment.

[0005] 3. Smart Response and Bio-Based Materials: Smart fabrics achieve dynamic protection through photosensitive or temperature-sensitive materials. For example, photochromic materials can adjust light transmittance according to UV intensity, while electrochromic materials can actively adjust shielding effects. The advantage of this type of technology is that it can adapt to environmental changes, but the technology is not mature enough and is expensive, and most of them are currently in the laboratory stage. On the other hand, bio-based materials (such as bamboo fiber and wood pulp fiber) combine natural UV-resistant ingredients (such as lignin) with environmentally friendly coatings to achieve both protection and sustainability, but their mechanical strength is generally lower than that of synthetic fibers.

[0006] 4. Multi-layer composites and structural optimization: Optimizing fabric structure (e.g., high-density weaving and multi-layer composites) can physically block UV rays and enhance water resistance. Furthermore, nanofiber membranes (e.g., hydrophobic membranes produced by electrospinning) enhance water resistance through their micro-nano roughness while allowing water vapor to pass through. However, this process is complex and costly.

[0007] The current landscape for waterproof and UV-resistant fabrics features a multi-faceted approach encompassing coatings, nanocomposites, and intelligent response technologies. Coatings dominate due to their low cost and ease of adoption, but suffer from limited durability. Nanomaterials offer effective protection, but environmental and health risks must be addressed. Intelligent and bio-based materials represent the future, but technological bottlenecks must be overcome. Currently, considering performance, price, and technical limitations, coatings remain the optimal choice. Summary of the Invention

[0008] The purpose of the present invention is to combine multiple methods to prepare a fabric with better comprehensive performance in view of the advantages and disadvantages of different methods.

[0009] In order to solve the above problems, the present invention provides a braided fiber coating, comprising the following components in parts by mass:

[0010]

[0011] The method for preparing the braided fiber coating comprises the steps of:

[0012] S1 Inorganic material modification: diatomaceous earth, sponge spicules, and fumed silica are acid-washed and then calcined; after calcination, the treated diatomaceous earth, sponge spicules, fumed silica, and 3-glycidoxypropyltrimethoxysilane are dispersed in an aqueous solution and ultrasonically treated; then reacted at 60-70° C. for at least 3 hours; centrifuged, washed, and dried to obtain a modified inorganic material;

[0013] S2 polyurethane coating mixing: mixing waterborne polyurethane, inorganic modified material, nano titanium dioxide, dispersant, crosslinking agent and defoaming agent to form a uniform solution; obtaining a woven fiber coating;

[0014] The added amount of the dispersant is 0.5-1.5 parts; the added amount of the cross-linking agent is 0.05-0.10 parts; and the added amount of the defoaming agent is 1-2 parts.

[0015] Preferably, in the inorganic material modification step S1, 0.5-1 part of sodium polyacrylate is added.

[0016] Preferably, in the inorganic material modification step S1, the pH of the pickling solution is ≤1; the pickling temperature is 65±5°C, and the time is at least 1 hour; and the material is washed to neutrality after pickling.

[0017] Preferably, in the inorganic material modification step S1, the calcination temperature is 650±50° C. and the calcination time is 1-2 h.

[0018] Preferably, in the inorganic material modification step S1, the concentration of the aqueous solution is 20-30 wt%.

[0019] Preferably, in the polyurethane coating mixing step S2, the defoaming agent is a silicone defoaming agent.

[0020] Preferably, the waterborne polyurethane is prepared from polypropylene oxide ether with a molecular weight of 3000-4000 and isophorone diisocyanate in a molar ratio of 1:1.05-1.10.

[0021] Preferably, polypropylene oxide ether and isophorone diisocyanate are mixed, a catalyst and a chain extender are added, and the mixture is reacted at 80±5° C. for 2-3 hours with continuous stirring under nitrogen protection; after forming a uniform emulsion, the mixture is sealed and stored;

[0022] The dosage of the catalyst is 0.01-0.02 parts; the dosage of the chain extender is 5-8 parts; and the chain extender is a long-chain aliphatic diol chain extender.

[0023] The present invention also provides application of the aforementioned woven fiber coating in clothing fiber processing.

[0024] Preferably, during application, the woven fiber coating is deaerated and then applied or soaked onto clothing fibers and then cured.

[0025] The present invention uses water-based polyurethane as its primary base material; water-based polyurethane uses water as its dispersion medium, has a low VOC content, and meets the requirements of green chemistry. Polypropylene oxide ether with a molecular weight of 3000-4000 is synthesized with isophorone diisocyanate in a molar ratio of 1:1.05-1.10 to form a highly elastic, wear-resistant coating without causing the clothing to become too stiff and significantly altering its texture. The present invention utilizes hydrophobic groups (isophorone diisocyanate) in the polyurethane molecular chain to form a dense coating, effectively blocking water penetration. Its cross-linked structure enhances the coating's hydrolysis resistance, maintaining its waterproof effect even after long-term immersion.

[0026] The present invention adds a small amount of nano titanium dioxide, which can reflect / absorb ultraviolet rays and assist in anti-ultraviolet function; it can also utilize its photocatalytic activity to decompose organic pollutants and inhibit bacterial growth.

[0027] The present invention uses three different forms and areas of silica products, namely diatomaceous earth, sponge spicules, and fumed silica, to perform dual modification for waterproofing and UV resistance; wherein diatomaceous earth has a micron-level porous structure; sponge spicules have a micron-level needle-like structure; and fumed silica has a nano-level granular structure. After the three are mixed in a reasonable mass ratio, they can form hydrophobic properties similar to lotus leaves. To achieve the lotus leaf effect, two conditions are required: (1) the surface of the material has a certain degree of roughness; (2) the surface of the material has a low surface energy substance. The three different specifications of silica substances used in the present invention solve the first problem; while diatomaceous earth, sponge spicules, and fumed silica are all hydrophilic materials and need to be modified; the present invention uses 3-glycidyloxypropyltrimethoxysilane for modification to reduce their surface energy and prepare a hydrophobic material. 3-glycidyloxypropyltrimethoxysilane forms a chemical bond with the polyurethane matrix, improving the adhesion between the coating and the fiber and preventing moisture from penetrating from the interface.

[0028] In order to prevent the inorganic material from agglomerating during the preparation process, the present invention uses ultrasonic treatment and adds a dispersant, sodium polyacrylate.

[0029] As for the anti-ultraviolet function, after achieving UPF>50 and UVA transmittance<5%, further enhancing its sun protection effect has relatively little effect unless in extreme environments, and more consideration should be given to the durability of the sun protection effect during long-term use.

[0030] In the present invention, fumed silica and nano-titanium dioxide are direct anti-ultraviolet materials; and other inorganic materials are compositely modified and compositely designed; combined with the certain sun protection ability of the fabric itself; the effect has met the relevant requirements of the sun protection index. More importantly, the coating of the present invention has long-term protection ability; after multiple washings, it still has relatively excellent anti-ultraviolet ability.

[0031] This invention achieves excellent waterproof and UV resistance through a triple mechanism: hydrophobicity of the waterborne polyurethane substrate, inorganic filler modification, and light protection with nano-titanium dioxide. It offers high hydrostatic pressure resistance, strong interfacial bonding, and excellent durability. It also provides broad-spectrum UV protection, strong weather resistance, and excellent fiber adhesion. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the specified features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] In the description of the present invention, the term "for example" is used to mean "used as an example, illustration or illustration". Any embodiment of the present invention described as "for example" is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed herein.

[0035] Unless otherwise specified, the experimental methods used in the specific embodiments are all conventional methods, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0036] In the present invention, unless otherwise specified, “%” represents mass percentage; the raw materials, reagents, etc. used are all conventional commercially available products.

[0037] The dispersant used in the present invention is sodium polyacrylate.

[0038] The defoaming agent used in the present invention is polydimethylsiloxane.

[0039] The crosslinking agent used in the present invention is silicone epoxy SE362.

[0040] The catalyst used in the present invention is dibutyltin dilaurate.

[0041] The chain extender used in the present invention is 1,6-hexanediol.

[0042] The average molecular weight of the polypropylene oxide ether used in the present invention is 3500, with a fluctuation range of 500.

[0043] The woven fiber used in the present invention is polyester fiber.

[0044] Example 1

[0045] The preparation of the braided fiber comprises the following steps:

[0046] S1 raw material weighing:

[0047] Weigh the following ingredients in parts by mass:

[0048]

[0049] S2 Inorganic material modification: diatomaceous earth, sponge spicules, and fumed silica were immersed in a 5% sulfuric acid solution at 60°C for 1 hour, and then rinsed with water until neutral;

[0050] Then, they were calcined at a temperature of 650±50°C for 1 h.

[0051] After calcination, the treated diatomaceous earth, sponge spicules, fumed silica and 3-glycidoxypropyltrimethoxysilane were dispersed in an aqueous solution with a concentration of 20%; 0.5 parts of sodium polyacrylate were additionally added; and then ultrasonically shaken for 30 minutes;

[0052] React at 60-70°C for 3h;

[0053] After the reaction, the product is centrifuged, washed and dried to obtain a modified inorganic material;

[0054] S3 Polyurethane Coating Mix:

[0055] Mix polypropylene oxide ether and isophorone diisocyanate, add 0.01 parts of dibutyltin dilaurate and 5 parts of 1,6-hexanediol, and react at 80±5°C for 2 hours with continuous stirring under nitrogen protection to obtain waterborne polyurethane;

[0056] Mixing waterborne polyurethane, inorganic modified material, nano titanium dioxide, 0.5 parts of sodium polyacrylate, 0.05 parts of organosilicon epoxy SE362 and 1 part of polydimethylsiloxane to form a uniform solution; obtaining a woven fiber coating;

[0057] S4 coating:

[0058] Take polyester fiber fabric and treat it in plasma treatment equipment for 30 seconds;

[0059] The woven fiber coating is then placed in a mold for natural casting, and then placed in an oven for drying to obtain a polyurethane coating film;

[0060] The polyurethane coating film is laminated on the fabric to complete the single-side coating treatment, and then the fabric substrate treated with the single-side coating is pre-baked at 100° C. for 3 minutes and baked at 160° C. for 1 minute to obtain a woven fiber.

[0061] Example 2

[0062] The preparation of the braided fiber comprises the following steps:

[0063] S1 raw material weighing:

[0064] Weigh the following ingredients in parts by mass:

[0065]

[0066] S2 Inorganic material modification: diatomaceous earth, sponge spicules, and fumed silica were immersed in a 5% sulfuric acid solution at 60°C for 1 hour, and then rinsed with water until neutral;

[0067] Then, they were calcined at a temperature of 650±50°C for 1 h.

[0068] After calcination, the treated diatomaceous earth, sponge spicules, fumed silica and 3-glycidoxypropyltrimethoxysilane were dispersed in an aqueous solution with a concentration of 20%; 1.0 part of sodium polyacrylate was additionally added; and then ultrasonically shaken for 30 minutes;

[0069] React at 60-70°C for 3h;

[0070] After the reaction, the product is centrifuged, washed and dried to obtain a modified inorganic material;

[0071] S3 Polyurethane Coating Mix:

[0072] Mix polypropylene oxide ether and isophorone diisocyanate, add 0.02 parts of dibutyltin dilaurate and 6 parts of 1,6-hexanediol, and react at 80±5°C for 2 hours with continuous stirring under nitrogen protection to obtain waterborne polyurethane;

[0073] Mixing waterborne polyurethane, inorganic modified material, nano titanium dioxide, 1.0 part sodium polyacrylate, 0.07 part organosilicon epoxy SE362 and 1.5 parts polydimethylsiloxane to form a uniform solution; obtaining a woven fiber coating;

[0074] S4 coating:

[0075] Take polyester fiber fabric and treat it in plasma treatment equipment for 30 seconds;

[0076] The woven fiber coating is then placed in a mold for natural casting, and then placed in an oven for drying to obtain a polyurethane coating film;

[0077] The polyurethane coating film is laminated on the fabric to complete the single-side coating treatment, and then the fabric substrate treated with the single-side coating is pre-baked at 100° C. for 3 minutes and baked at 160° C. for 1 minute to obtain a woven fiber.

[0078] Example 3

[0079] The preparation of the braided fiber comprises the following steps:

[0080] S1 raw material weighing:

[0081] Weigh the following ingredients in parts by mass:

[0082]

[0083] S2 Inorganic material modification: diatomaceous earth, sponge spicules, and fumed silica were immersed in a 5% sulfuric acid solution at 60°C for 1 hour, and then rinsed with water until neutral;

[0084] Then, they were calcined at a temperature of 650±50°C for 1 h.

[0085] After calcination, the treated diatomaceous earth, sponge spicules, fumed silica and 3-glycidoxypropyltrimethoxysilane were dispersed in an aqueous solution with a concentration of 20%; 1.0 part of sodium polyacrylate was additionally added; and then ultrasonically shaken for 30 minutes;

[0086] React at 60-70°C for 3h;

[0087] After the reaction, the product is centrifuged, washed and dried to obtain a modified inorganic material;

[0088] S3 Polyurethane Coating Mix:

[0089] Mix polypropylene oxide ether and isophorone diisocyanate, add 0.02 parts of dibutyltin dilaurate and 8 parts of 1,6-hexanediol, and react at 80±5°C for 2 hours under nitrogen protection while stirring continuously to obtain waterborne polyurethane;

[0090] Mixing waterborne polyurethane, inorganic modified material, nano titanium dioxide, 1.5 parts of sodium polyacrylate, 0.10 parts of organosilicon epoxy SE362 and 2.0 parts of polydimethylsiloxane to form a uniform solution; obtaining a woven fiber coating;

[0091] S4 coating:

[0092] Take polyester fiber fabric and treat it in plasma treatment equipment for 30 seconds;

[0093] The woven fiber coating is then placed in a mold for natural casting, and then placed in an oven for drying to obtain a polyurethane coating film;

[0094] The polyurethane coating film is laminated on the fabric to complete the single-side coating treatment, and then the fabric substrate treated with the single-side coating is pre-baked at 100° C. for 3 minutes and baked at 160° C. for 1 minute to obtain a woven fiber.

[0095] Example 4

[0096] The preparation of the braided fiber differs from that of Example 1 in that:

[0097] In step S1, in weighing the raw materials, the mass fraction of diatomaceous earth is 4.5 parts, and no fumed silica and sponge spicules are added.

[0098] Example 5

[0099] The preparation of the braided fiber differs from that of Example 1 in that:

[0100] In step S1, in weighing the raw materials, the mass fraction of fumed silica is 4.5 parts, and diatomaceous earth and sponge spicules are not added.

[0101] Example 6

[0102] The preparation of the braided fiber differs from that of Example 1 in that:

[0103] In step S1, the weight portion of the sponge spicules is 4.5 parts, and diatomaceous earth and fumed silica are not added.

[0104] Example 7

[0105] The preparation of the braided fiber differs from that of Example 1 in that:

[0106] In the weighing of raw materials in step S1, the mass parts of fumed silica are 3.38 parts; the mass parts of sponge spicules are 1.12 parts, and no diatomaceous earth is added.

[0107] Example 8

[0108] The preparation of the braided fiber differs from that of Example 1 in that:

[0109] In step S1, in weighing the raw materials, the mass fraction of diatomaceous earth is 3.75 parts; the mass fraction of sponge spicules is 0.75 parts, and no fumed silica is added.

[0110] Example 9

[0111] The preparation of the braided fiber differs from that of Example 1 in that:

[0112] In the weighing of raw materials in step S1, the mass fraction of diatomaceous earth is 2.82 parts; the mass fraction of fumed silica is 1.68 parts, and no sponge spicules are added.

[0113] Example 10

[0114] The preparation of the braided fiber differs from that of Example 1 in that:

[0115] S2 inorganic material modification was modified as follows: diatomaceous earth, sponge spicules, and fumed silica were immersed in 5% sulfuric acid solution at 60°C for 1 hour, and then rinsed with water until neutral;

[0116] Then, they were calcined at a temperature of 650±50°C and a time of 1 h.

[0117] Example 11

[0118] The preparation of the braided fiber differs from that of Example 1 in that:

[0119] No diatomaceous earth, fumed silica and sponge spicules were added; the mass fraction of nano-titanium dioxide was changed to 4.6 parts; and step S2 of inorganic material modification was not performed.

[0120] Example 12

[0121] In step S1, when weighing the raw materials, no nano-titanium dioxide is added, and the mass fraction of diatomaceous earth is 2.6 parts.

[0122] The aforementioned embodiments were subjected to performance tests, including hydrostatic pressure resistance, contact angle test, and UPF.

[0123] The hydrostatic pressure resistance is tested according to the method in GB / T 4744-2013 Testing and evaluation of waterproof performance of textiles - Hydrostatic pressure method.

[0124] The contact angle is tested according to the method in “DB44T 1872—2016 Contact Angle Method for Determination of Wetting Properties of Textile Surfaces”.

[0125] The UPF is tested according to the method described in GB / T 18830-2009 Evaluation of UV Protection of Textiles.

[0126] The washing process follows the standard washing procedure of "GB / T 8629-2017 Textile Testing - Household Washing and Drying Procedure", using a type A standard washing machine and hanging to dry.

[0127] The results are shown in Table 1 below:

[0128] Table 1

[0129]

[0130] From the test results in Table 1, it can be seen that Examples 4-9 are to explore the effects of diatomaceous earth, fumed silica and sponge bone needle on waterproof and anti-ultraviolet functions; Examples 10, 11 and 12 are to explore the effects of process and titanium dioxide on performance.

[0131] As for the waterproofing effect, Examples 4-6 used two of the three: diatomaceous earth, fumed silica, and sponge spicules; Examples 7-9 used diatomaceous earth, fumed silica, and sponge spicules alone. It can be seen that any two of these three can achieve a certain lotus leaf effect; however, the effect is still not as good as when the three are combined in a specific ratio. As the percentage of the three added increases, the water resistance also increases accordingly (Examples 1-3). In Example 10, since the diatomaceous earth, fumed silica, and sponge spicules are not modified, and all three are hydrophilic materials, its hydrophilicity is even better than that of unprocessed polyester fiber fabric. After washing, its hydrophobicity is even slightly improved due to being partially washed away.

[0132] Similarly, unmodified titanium dioxide (Example 11) also exhibits high hydrophilicity.

[0133] In Example 12, titanium dioxide was not added, but the difference was small because the difference in the amount of addition was small.

[0134] In terms of sun protection, under the same process and dosage, the order is titanium dioxide > fumed silica > diatomaceous earth > sponge spicules. The effects of titanium dioxide and fumed silica are far greater than those of diatomaceous earth and sponge spicules. Therefore, the results show that Example 11, which contains a higher amount of titanium dioxide, exhibits the best sun protection. In contrast, Example 10, which does not modify the diatomaceous earth, fumed silica, or sponge spicules, exhibits significantly reduced adhesion to the fabric, leading to a significant drop in sun protection after washing.

[0135] In summary, although the addition of titanium dioxide and fumed silica can significantly improve its anti-ultraviolet ability, since the purpose of the present invention is to obtain a clothing fabric coating with excellent waterproof and sun protection capabilities, the specific ratio of diatomaceous earth, fumed silica and sponge bone needles can significantly improve the waterproof ability at the expense of a small degree of sun protection ability, which is a manifestation of the purpose of the present invention.

[0136] The above detailed description is a specific description of one feasible embodiment of the present invention. This embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the scope of the technical solution of the present invention.

Claims

1. A woven fiber coating, characterized in that The invention comprises the following components in parts by mass: The method for preparing the braided fiber coating comprises the steps of: S1 Inorganic material modification: diatomaceous earth, sponge spicules, and fumed silica are acid-washed and then calcined; after calcination, the treated diatomaceous earth, sponge spicules, fumed silica, and 3-glycidoxypropyltrimethoxysilane are dispersed in an aqueous solution and ultrasonically treated; then reacted at 60-70° C. for at least 3 hours; centrifuged, washed, and dried to obtain a modified inorganic material; S2 polyurethane coating mixing: mixing waterborne polyurethane, inorganic modified material, nano titanium dioxide, dispersant, crosslinking agent and defoaming agent to form a uniform solution; obtaining a woven fiber coating; The added amount of the dispersant is 0.5-1.5 parts; the added amount of the cross-linking agent is 0.05-0.10 parts; and the added amount of the defoaming agent is 1-2 parts.

2. The woven fiber coating according to claim 1, characterized in that In the inorganic material modification step S1, 0.5-1 part of sodium polyacrylate is added.

3. The woven fiber coating according to claim 1, characterized in that In the inorganic material modification step S1, the pH of the pickling solution is ≤1; the pickling temperature is 65±5°C and the time is at least 1 hour; and the material is washed to neutrality after pickling.

4. The woven fiber coating according to claim 1, wherein: In the inorganic material modification step S1, the calcination temperature is 650±50° C. and the calcination time is 1-2 hours.

5. The woven fiber coating according to claim 1, wherein: In the inorganic material modification step S1, the concentration of the aqueous solution is 20-30 wt%.

6. The woven fiber coating according to claim 1, characterized in that In the polyurethane coating mixing step S2, the defoaming agent is a silicone defoaming agent.

7. The woven fiber coating according to claim 1, wherein: The waterborne polyurethane is prepared from polypropylene oxide ether with a molecular weight of 3000-4000 and isophorone diisocyanate in a molar ratio of 1:1.05-1.

10.

8. The woven fiber coating according to claim 7, characterized in that Mix polypropylene oxide ether and isophorone diisocyanate in molar ratio, add catalyst and chain extender, react at 80±5℃ for 2-3h under nitrogen protection and stir continuously; after forming a uniform emulsion, seal and store; The dosage of the catalyst is 0.01-0.02 parts; the dosage of the chain extender is 5-8 parts; and the chain extender is a long-chain aliphatic diol chain extender.

9. Use of the woven fiber coating according to any one of claims 1 to 8 in clothing fiber processing.

10. The use according to claim 9, characterized in that During application, the woven fabric coating is deaerated, then applied or impregnated onto the fabric and allowed to cure.

Images