Wear-resistant film-coated windproof fabric and preparation method thereof

Abstract

This invention relates to a wear-resistant coated windproof fabric and its preparation method. The fabric comprises an inner layer and a coated windproof outer layer. The coated windproof outer layer is obtained by uniformly coating a modified polyurethane solution onto the surface of a base fabric and then drying it. The modified polyurethane solution comprises, by weight, 60-68 parts of an aqueous polyurethane solution, 10-16 parts of a biomass extract, 12-16 parts of silica, 5-8 parts of a thickener, and 3-7 parts of a dispersant. The fabric prepared by the method of this invention exhibits high wear resistance, windproofness, UV resistance, and flame retardancy. It is a wear-resistant coated windproof fabric. Using this fabric as a down jacket material can significantly improve the durability and protective performance of down jackets and meet the needs of different users in diverse environments, thus having significant practical value.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a wear-resistant coated windproof fabric and its preparation method. Background Technology

[0002] With the rapid development of outdoor sports and functional clothing, the market demand for multifunctional down jacket fabrics that combine abrasion resistance, windproofness, UV resistance, and flame retardancy is increasing. These properties not only enhance the durability and protective performance of clothing, but also meet the needs of different users in diverse environments.

[0003] However, traditional polyester or nylon fabrics often have certain shortcomings in these functional aspects, such as poor UV resistance, which cannot effectively block the harmful effects of ultraviolet rays on the human body; insufficient flame retardancy, which poses safety hazards, etc. As a result, it is difficult for the fabric to simultaneously possess high abrasion resistance, windproofness, UV resistance, and flame retardancy. Therefore, this invention provides an abrasion-resistant coated windproof fabric and its preparation method to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a wear-resistant coated windproof fabric and its preparation method in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A wear-resistant coated windproof fabric, the fabric comprising an inner layer and a coated windproof outer layer, wherein the coated windproof outer layer is obtained by uniformly coating a modified polyurethane solution onto the surface of a base fabric and then drying it.

[0007] The raw materials for preparing the modified polyurethane solution, by weight, include 60-68 parts of an aqueous polyurethane solution with a mass fraction of 35-50%, 10-16 parts of biomass extract, 12-16 parts of silica, 5-8 parts of thickener, and 3-7 parts of dispersant.

[0008] As a further optimization of the present invention, the inner layer is cotton fabric; the warp and weft fineness of the cotton fabric is 35-50D, the warp yarn weaving density is 55-85 threads / cm, and the weft yarn weaving density is 60-70 threads / cm.

[0009] The base fabric is polyester or nylon fabric; the warp and weft fineness of the base fabric is 25-45D, the warp yarn weaving density is 70-100 threads / cm, and the weft yarn weaving density is 55-80 threads / cm.

[0010] As a further optimization of the present invention, the coating thickness is 0.1-0.5 mm.

[0011] As a further optimization of the present invention, the dispersant is at least one of sodium polyacrylate and polyvinylpyrrolidone; the thickener is at least one of guar gum, carboxymethyl cellulose, and hydroxyethyl cellulose.

[0012] This invention also provides a method for preparing a wear-resistant coated windproof fabric, the specific steps of which include:

[0013] (1) The biomass extract and aqueous polyurethane solution were stirred evenly under heat preservation and heating conditions to obtain a mixed system.

[0014] (2) Add silica to the first mixing system, and add dispersant and thickener in sequence. After ultrasonic dispersion treatment, a modified polyurethane solution is obtained.

[0015] (3) The modified polyurethane solution is uniformly coated on the surface of the base fabric and dried to obtain a coated windproof surface layer. The coated windproof surface layer is hot-pressed and laminated with the inner fabric to obtain a wear-resistant coated windproof fabric.

[0016] As a further optimization of the present invention, the heat preservation and heating time is 3-6 hours and the temperature is 35℃-45℃.

[0017] As a further optimization of the present invention, the ultrasonic dispersion treatment has a power of 100-150W, a frequency of 35-50kHz, a temperature of 35-40℃, and a time of 30-50min.

[0018] As a further optimization of the present invention, the method for obtaining the biomass extract is as follows: the biomass is mixed with an acid solution with a mass concentration of 5%-20% and soaked for 5-8 hours, with a material-to-liquid mass ratio of 1:10-16. Then, the extract is shaken and extracted at a temperature of 60-80℃ for 2-3 hours, and the resulting supernatant is concentrated and dried.

[0019] As a further optimization of the present invention, the biomass includes at least one of sesame meal, rapeseed meal, and sawdust.

[0020] As a further optimization of the present invention, the acid solution is a hydrochloric acid solution or an acetic acid solution.

[0021] The beneficial effects of this invention are as follows:

[0022] 1) The fabric prepared by the preparation method of the present invention has high wear resistance, windproof, UV resistance and flame retardancy. It is a wear-resistant coated windproof fabric. Using this fabric as down jacket fabric can not only significantly improve the durability and protective performance of down jackets, but also meet the needs of different users in diverse environments, which has important practical significance.

[0023] 2) This invention adds biomass extract obtained by acid extraction of biomass (especially biomass extract obtained by acid extraction of a mixture of sesame meal and sawdust) to a mixture of silica-modified waterborne polyurethane, and then coats the modified polyurethane solution onto the fabric surface, which can significantly improve the fabric’s abrasion resistance, wind resistance, UV resistance and flame retardancy, with remarkable effect. Detailed Implementation

[0024] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] I. Materials

[0026] 1. Sodium polyacrylate and polyvinylpyrrolidone were purchased from Shanghai Chuangsai Technology Co., Ltd., with a purity of 99%;

[0027] 2. Guar gum, carboxymethyl cellulose, and hydroxyethyl cellulose were all purchased from Jiangsu Yihaotian Biotechnology Co., Ltd., with a purity of 99%.

[0028] 3. The waterborne polyurethane was purchased from Hubei Xinrunde Chemical Co., Ltd. The purity was 99%. The waterborne polyurethane solution with a mass fraction of 30-50% was obtained by mixing waterborne polyurethane with deionized water. The waterborne polyurethane solution with a mass fraction of 38% was used in the following experiments.

[0029] 4. The base layer of this invention is polyester fabric; the warp and weft fineness of the base fabric is 28D, the warp yarn weaving density is 75 threads / cm, and the weft yarn weaving density is 65 threads / cm.

[0030] 5. The inner layer of the present invention is cotton fabric with a warp and weft fineness of 40D, a warp yarn weaving density of 65 threads / cm, and a weft yarn weaving density of 60 threads / cm.

[0031] Unless otherwise specified, all methods used in the following examples can be performed using conventional methods. Other materials and reagents used can be obtained commercially unless otherwise specified.

[0032] II. Methods

[0033] 2.1 Preparation of abrasion-resistant coated windproof fabric

[0034] A method for preparing a wear-resistant coated windproof fabric, the specific steps of which are as follows:

[0035] The raw materials for preparing the modified polyurethane solution, by weight, include 68 parts of an aqueous polyurethane solution with a mass fraction of 38%, 10 parts of biomass extract, 12 parts of silica, 6 parts of thickener, and 4 parts of dispersant.

[0036] (1) Sesame meal was mixed with an acid solution with a mass concentration of 14% and soaked for 6 hours. The mass ratio of material to liquid was 1:12. Then, it was shaken and extracted at 75℃ for 2.5 hours. The resulting supernatant was concentrated and dried to obtain a biomass extract.

[0037] (2) The biomass extract and a 38% aqueous polyurethane solution were heated at 42°C for 4 hours with constant stirring. After heating, a mixed system was obtained. Silica was added to the mixed system and sodium polyacrylate and carboxymethyl cellulose were added in sequence. After ultrasonic dispersion, a modified polyurethane solution was obtained.

[0038] (3) The modified polyurethane solution is uniformly coated on the surface of the base fabric with a coating thickness of 0.35 mm. After drying, a coated windproof surface layer is obtained. The coated windproof surface layer is hot-pressed and laminated with the inner fabric to obtain a wear-resistant coated windproof fabric A1.

[0039] 2.2 Preparation of Abrasion-Resistant Coated Windproof Fabric: Raw Material Adjustment

[0040] To investigate the effects of different biomass extracts on various fabric properties, the raw materials for preparing the biomass extracts were adjusted based on the preparation of the abrasion-resistant coated windproof fabric in group A1. Specific adjustments are shown in Table 1.

[0041] Table 1. Detailed list of raw material adjustments for the preparation of different biomass extracts.

[0042]

[0043]

[0044] To investigate the effects of modifying waterborne polyurethane with different biomass extracts and silica on various fabric properties, corresponding control and blank groups were designed, as follows:

[0045] Control group 1: Based on group B3, the raw materials for preparing the modified polyurethane solution were adjusted. In this control group, by weight, it included 78 parts of waterborne polyurethane solution with a mass fraction of 38%, 12 parts of silica, 6 parts of thickener, and 4 parts of dispersant.

[0046] Control Group 2: Based on Group B3, the raw materials for preparing the modified polyurethane solution were adjusted. In this control group, by weight, it included 80 parts of water-based polyurethane solution with a mass fraction of 38%, 10 parts of biomass extract, 6 parts of thickener, and 4 parts of dispersant.

[0047] Control group 3: Based on group B3, the raw materials for preparing the modified polyurethane solution were adjusted. In this control group, by weight, it included 90 parts of waterborne polyurethane solution with a mass fraction of 38%, 6 parts of thickener, and 4 parts of dispersant.

[0048] Blank group: The fabric is obtained by hot-pressing the uncoated base fabric directly with the inner fabric.

[0049] III. Performance Testing

[0050] 3.1 Fabric breathability test

[0051] Air permeability tests were conducted on the fabrics in groups A1-A7, B1-B3, control groups 1-3, and the blank group. According to the national standard (GB / T5433), a YG461G fully automatic fabric air permeability meter was used to test the air permeability of the samples. The specific experimental parameters were set as follows: ambient temperature 28℃, relative humidity 50%, pressure difference 110Pa, and air permeability area 25cm². 2 The nozzle diameter is 0.6 mm. Five tests were conducted on different parts of the fabric sample, and the average value was taken as the final air permeability data, recorded in Table 2.

[0052] Table 2. Test data on fabric breathability performance.

[0053]

[0054] Experimental conclusion: As shown in Table 2, the breathability of the fabrics in groups A2, A3, A7, B2, B3 and control group 1 is poor, indicating that the fabrics have good windproof effect. Among them, the windproof effect of the fabrics in groups A3, A7 and B3 is more prominent.

[0055] 3.2 Fabric abrasion resistance test

[0056] The abrasion resistance of the fabrics in groups A1-A7, B1-B3, control groups 1-3, and the blank group was tested according to GB / T21196.2-2007 "Textiles - Determination of Abrasion Resistance of Fabrics by Martindale Method". The abrasion resistance index Ai (average mass loss per rub) was measured, and the experimental data are recorded in Table 3.

[0057] Table 3. Test data on fabric abrasion resistance

[0058]

[0059] Experimental Conclusion: As shown in Table 3, the abrasion resistance of the fabrics in groups A3 and B3 was significantly improved compared to the control group and the blank group. This indicates that biomass extracts obtained by acid extraction of biomass, especially biomass extracts obtained by acid extraction of a mixture of sesame meal and sawdust, when added to a silica-modified waterborne polyurethane mixture and then coated onto the fabric surface, can significantly improve the abrasion resistance of the fabric. In addition, combined with the above-mentioned fabric breathability test, it can be seen that the fabrics in groups A3 and B3 also have good windproof effect, and can combine high abrasion resistance and high windproof performance.

[0060] 3.3 Testing of fabric UV resistance and flame retardancy

[0061] The fabrics in groups A1-A7, B1-B3, control groups 1-3, and the blank group were tested for their UV protection performance. According to GB / T 18830—2009 "Evaluation of Ultraviolet Protection Performance of Textiles", a UV-2000F textile UV protection factor tester was used. Ten points were taken at different locations on each sample to test the UV protection factor (UPF) against ultraviolet light with wavelengths of 200-400nm. This UPF value was used as the evaluation standard for UV protection performance. The higher the UPF value, the better the UV protection performance. Generally, a UPF value greater than 40 indicates that the fabric has excellent UV protection performance.

[0062] Flame retardancy performance tests were conducted on the fabrics in groups A1-A7, B1-B3, control groups 1-3, and the blank group according to GB / T5455-1997 "Textiles - Test for Burning Performance - Vertical Method". The fabric samples were cut into rectangular strips with dimensions of 280mm × 125mm. The fabric samples were placed in the testing equipment, and the lower end was ignited. The testing equipment recorded the burning process of the samples and classified them into different grades based on their performance (the flame retardancy rating evaluation criteria are shown in Table 4).

[0063] Table 4 Flame Retardancy Rating Evaluation Standards

[0064]

[0065] The test data for the fabric's UV resistance and flame retardancy are shown in Table 5:

[0066] Table 5. Test data on UV resistance and flame retardancy of the fabric.

[0067]

[0068]

[0069] Experimental Conclusion: Based on the data in Table 5, it can be seen that the fabrics in groups A3 and B3 both showed significant advantages in UV resistance. Among them, the fabric in group B3 was the optimal solution, and its flame retardancy rating was also V-0. This indicates that the fabric in group B3 is the optimal solution. This fabric has high abrasion resistance, windproofness, UV resistance, and flame retardancy. It is an abrasion-resistant coated windproof fabric. It also suggests that there may be a certain synergistic effect between the biomass extract obtained by acid extraction of biomass composed of sesame meal and sawdust and silica, which can improve the abrasion resistance, windproofness, UV resistance, and flame retardancy of the fabric.

[0070] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A wear-resistant coated windproof fabric, characterized in that: The fabric includes an inner layer and a coated windproof outer layer. The inner layer is cotton fabric, and the coated windproof outer layer is obtained by uniformly coating a modified polyurethane solution onto the surface of a base fabric and then drying it. The base fabric is polyester or nylon fabric. The raw materials for preparing the modified polyurethane solution, by weight, include 60-68 parts of an aqueous polyurethane solution with a mass fraction of 35-50%, 10-16 parts of biomass extract, 12-16 parts of silica, 5-8 parts of thickener, and 3-7 parts of dispersant. The preparation method of the wear-resistant coated windproof fabric includes the following specific steps: (1) The biomass extract and aqueous polyurethane solution were stirred evenly under heat preservation and heating conditions to obtain a mixed system. (2) Add silica to the first mixture, and add dispersant and thickener in sequence. After ultrasonic dispersion treatment, a modified polyurethane solution is obtained. (3) The modified polyurethane solution is uniformly coated on the surface of the base fabric and dried to obtain a coated windproof surface layer. The coated windproof surface layer is hot-pressed and laminated with the inner fabric to obtain a wear-resistant coated windproof fabric. The method for obtaining the biomass extract is as follows: the biomass is mixed with an acid solution with a mass concentration of 5%-20% and soaked for 5-8 hours, with a material-to-liquid mass ratio of 1:10-16. Then, the extract is shaken and extracted at a temperature of 60-80℃ for 2-3 hours. The resulting supernatant is concentrated and dried. The biomass includes at least one of sesame meal, rapeseed meal, and sawdust. The acid solution is either hydrochloric acid or acetic acid.

2. The wear-resistant coated windproof fabric according to claim 1, characterized in that: The fineness of the warp and weft threads of the cotton fabric is 35-50D, the weaving density of the warp threads of the cotton fabric is 55-85 threads / cm, and the weaving density of the weft threads of the cotton fabric is 60-70 threads / cm. The base fabric has a warp and weft fineness of 25-45D, a warp weaving density of 70-100 threads / cm, and a weft weaving density of 55-80 threads / cm.

3. The wear-resistant coated windproof fabric according to claim 1, characterized in that: The coating thickness is 0.1-0.5 mm.

4. The wear-resistant coated windproof fabric according to claim 1, characterized in that: The dispersant is at least one of sodium polyacrylate and polyvinylpyrrolidone; the thickener is at least one of guar gum, carboxymethyl cellulose, and hydroxyethyl cellulose.

5. A method for preparing a wear-resistant coated windproof fabric as described in any one of claims 1-4, characterized in that: The specific steps include: (1) The biomass extract and aqueous polyurethane solution were stirred evenly under heat preservation and heating conditions to obtain a mixed system. (2) Add silica to the first mixture, and add dispersant and thickener in sequence. After ultrasonic dispersion treatment, a modified polyurethane solution is obtained. (3) The modified polyurethane solution is uniformly coated on the surface of the base fabric and dried to obtain a coated windproof surface layer. The coated windproof surface layer is hot-pressed and laminated with the inner fabric to obtain a wear-resistant coated windproof fabric.

6. The method for preparing a wear-resistant coated windproof fabric according to claim 5, characterized in that: The heat preservation and heating time is 3-6 hours, and the temperature is 35℃-45℃.

7. The method for preparing a wear-resistant coated windproof fabric according to claim 5, characterized in that: The ultrasonic dispersion treatment has a power of 100~150W, a frequency of 35~50kHz, a temperature of 35~40℃, and a time of 30~50min.

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