Manufacturing process of fabric with high water pressure resistance

Abstract

The invention relates to a manufacturing process of a fabric with high water pressure resistance, and belongs to the technical field of fabrics. The invention provides a high-water-pressure-resistant fabric manufacturing process which specifically comprises the following steps: X1, after a nylon fabric coiled material is unwound and subjected to corona treatment, the nylon fabric coiled material is padded in a polyurethane solution and pre-dried, and treated base cloth is obtained; x2, coating the surface of the treated base cloth with polyurethane mixed slurry, soaking the base cloth in water for solidification, washing the base cloth with water to remove chemical residues on the surface, and drying the base cloth to obtain a pre-coated fabric; and X3, immersing the pre-coated fabric into the working solution, padding, pre-drying, drying at a relatively high temperature, cooling and rolling to obtain the fabric. The prepared fabric has high water pressure resistance.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology and relates to a manufacturing process for a high water pressure resistant fabric. Background Technology

[0002] Water-resistant fabrics are functional textiles that can withstand a certain amount of water pressure without allowing moisture to penetrate. The higher the hydrostatic pressure resistance value, the stronger the waterproof performance of the fabric. Because this type of fabric can effectively prevent the intrusion of liquid water while maintaining breathability, it allows the wearer to stay dry and comfortable in humid or rainy environments. It is commonly used in outdoor sportswear, industrial anti-fouling clothing, medical protective clothing, as well as industrial textiles such as tents and sleeping bags.

[0003] Currently, water-resistant fabrics typically use fine denier or microfibers (such as polyester and nylon) woven with high warp and weft density to reduce the size of pores in the fabric, making it difficult for water molecules to penetrate. Alternatively, they can be coated or impregnated through hydrophobic finishing processes to form a low surface energy barrier on the fiber surface, causing water droplets to roll off in beads. However, regardless of structural improvements or surface hydrophobic treatments, the resulting water-resistant capabilities are limited. After long-term use, performance deteriorates due to fiber wear or deformation, requiring further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a manufacturing process for a high water pressure resistant fabric, the fabric of which has high water pressure resistance.

[0005] The objective of this invention can be achieved through the following technical solutions: A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0006] Furthermore, the nylon fabric mentioned in step X1 is nylon 66.

[0007] Further, the polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:8.8-9.2; the impregnation rate is 65-75%.

[0008] Further, the corona treatment in step X1 refers to setting the power of the corona treatment machine to 3-5kW and the speed to 24-26m / min; the pre-drying refers to pre-drying at 95-105℃ for 1-2min.

[0009] Further, the coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.17-0.19 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 9.5-10.5:2.3-2.7:1.4-1.6:1.4-1.6:0.8-1.2; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 8-12 wt%.

[0010] Further, step X2, water immersion and solidification, refers to soaking in water at 33-37℃ for 2-3 minutes; the water washing temperature is 54-56℃; and the drying refers to drying at 120-130℃ for 3-4 minutes.

[0011] Further, the working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.014-0.02:32-33; the padding rate is 73-77%.

[0012] Further, the pre-drying mentioned in step X3 refers to pre-drying at 85-95℃ for 1.5-2.5 min; the higher temperature drying refers to drying at 170-180℃ for 0.5-1.5 min.

[0013] Furthermore, a high water pressure resistant fabric is obtained using the above manufacturing process.

[0014] The beneficial effects of this invention are: This invention provides a highly water-resistant fabric. Corona treatment improves the surface free energy and roughness of the nylon base fabric, providing more bonding sites for subsequent coating. Next, a polyurethane liquid is used for padding and pre-drying, allowing polyurethane molecules to fully penetrate the fabric. This prevents excessive penetration of the polyurethane mixture into the base fabric, which could lead to hand hardening, and avoids issues such as thickness variations and discontinuities during polyurethane mixture coating. It also ensures good adhesion between the polyurethane mixture and the base fabric, preventing delamination and peeling during use. Furthermore, a polyurethane mixture is introduced, with the addition of UV absorbers and anti-hydrolysis agents. This prevents the polyurethane molecular chains from breaking, yellowing, or undergoing hydrolysis due to UV radiation, which could cause coating loss and lead to the outer waterproof layer peeling or failure. This significantly extends the fabric's service life, maintains performance stability, and endows the fabric with high water pressure resistance. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0016] In all embodiments and comparative examples of this invention, nylon 66 was purchased from Fu Mao Xingye (Zhongshan) Co., Ltd.; solvent-based polyurethane was purchased from Dongguan Zhangmutou Hengtai Plastic Raw Material Business Department; dimethylformamide was purchased from Shandong Qiyun Chemical Technology Co., Ltd.; polyvinyl alcohol was purchased from Jinan Xinling Chemical Technology Co., Ltd.; ultraviolet absorber TNK-581 was purchased from Taiwan Jihwa Chemical Industry Co., Ltd.; carbodiimide was purchased from Guangzhou Qiyuan New Material Co., Ltd.; fluorine-free waterproofing agent PM-3705 was purchased from 3M Company; and wetting and leveling agent XH-5018 was purchased from Shandong Huling New Material Co., Ltd.

[0017] Example 1 A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0018] The nylon fabric mentioned in step X1 is nylon 66.

[0019] The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:8.8; the impregnation rate is 65%.

[0020] The corona treatment in step X1 refers to setting the power of the corona treatment machine to 3kW and the speed to 24m / min; the pre-drying refers to pre-drying at 95℃ for 1min.

[0021] The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.17 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 9.5:2.3:1.4:1.4:0.8; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 8 wt%.

[0022] Step X2, immersion solidification, refers to soaking in water at 33°C for 2 minutes; the water washing temperature is 54°C; and the drying refers to drying at 120°C for 3 minutes.

[0023] The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.014:32; the padding rate is 73%.

[0024] The pre-drying mentioned in step X3 refers to pre-drying at 85°C for 1.5 minutes; the higher temperature drying refers to drying at 170°C for 0.5 minutes.

[0025] High water pressure resistant fabric produced using the above manufacturing process.

[0026] Example 2 A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0027] The nylon fabric mentioned in step X1 is nylon 66.

[0028] The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:8.9; the impregnation rate is 68%.

[0029] The corona treatment in step X1 refers to setting the power of the corona treatment machine to 3kW and the speed to 24m / min; the pre-drying refers to pre-drying at 98℃ for 1min.

[0030] The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.17 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 9.7:2.4:1.45:1.45:0.9; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 9 wt%.

[0031] Step X2, water immersion and solidification, refers to soaking in water at 34°C for 2 minutes; the water washing temperature is 54°C; and the drying refers to drying at 123°C for 3 minutes.

[0032] The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.016:32.3; the padding rate is 74%.

[0033] The pre-drying mentioned in step X3 refers to pre-drying at 88°C for 1.5 minutes; the higher temperature drying refers to drying at 174°C for 0.5 minutes.

[0034] High water pressure resistant fabric produced using the above manufacturing process.

[0035] Example 3 A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0036] The nylon fabric mentioned in step X1 is nylon 66.

[0037] The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:9; the impregnation rate is 70%.

[0038] The corona treatment in step X1 refers to setting the power of the corona treatment machine to 4kW and the speed to 25m / min; the pre-drying refers to pre-drying at 100℃ for 1.5min.

[0039] The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.18 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 10:2.5:1.5:1.5:1; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 10 wt%.

[0040] Step X2, water immersion and solidification, refers to soaking in water at 35°C for 2.5 minutes; the water washing temperature is 55°C; and the drying refers to drying at 125°C for 3.5 minutes.

[0041] The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.017:32.5; the padding rate is 75%.

[0042] The pre-drying mentioned in step X3 refers to pre-drying at 90°C for 2 minutes; the higher temperature drying refers to drying at 175°C for 1 minute.

[0043] High water pressure resistant fabric produced using the above manufacturing process.

[0044] Example 4 A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0045] The nylon fabric mentioned in step X1 is nylon 66.

[0046] The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:9.1; the impregnation rate is 72%.

[0047] The corona treatment in step X1 refers to setting the power of the corona treatment machine to 5kW and the speed to 26m / min; the pre-drying refers to pre-drying at 102℃ for 2min.

[0048] The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.19 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 10.3:2.6:1.55:1.55:1.1; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 11 wt%.

[0049] Step X2, immersion solidification, refers to soaking in water at 36°C for 3 minutes; the water washing temperature is 56°C; and the drying refers to drying at 128°C for 4 minutes.

[0050] The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.018:32.6; the padding rate is 76%.

[0051] The pre-drying mentioned in step X3 refers to pre-drying at 93°C for 2.5 minutes; the higher temperature drying refers to drying at 177°C for 1.5 minutes.

[0052] High water pressure resistant fabric produced using the above manufacturing process.

[0053] Example 5 A manufacturing process for a high water pressure resistant fabric, comprising the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0054] The nylon fabric mentioned in step X1 is nylon 66.

[0055] The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:9.2; the impregnation rate is 75%.

[0056] The corona treatment in step X1 refers to setting the power of the corona treatment machine to 5kW and the speed to 26m / min; the pre-drying refers to pre-drying at 105℃ for 2min.

[0057] The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.19 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 10.5:2.7:1.6:1.6:1.2; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 12 wt%.

[0058] Step X2, immersion solidification, refers to soaking in water at 37°C for 3 minutes; the water washing temperature is 56°C; and the drying refers to drying at 130°C for 4 minutes.

[0059] The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.02:33; the padding rate is 77%.

[0060] The pre-drying mentioned in step X3 refers to pre-drying at 95°C for 2.5 minutes; the higher temperature drying refers to drying at 180°C for 1.5 minutes.

[0061] High water pressure resistant fabric produced using the above manufacturing process.

[0062] Example 6 Based on Example 3, the polyurethane liquid was obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 2:8, and other conditions remained the same as in Example 3.

[0063] Example 7 Based on Example 3, the polyurethane liquid was obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 0.5:9.5, and other conditions remained the same as in Example 3.

[0064] Example 8 Based on Example 3, the polyurethane mixed slurry was obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, and carbodiimide in a mass ratio of 11.5:2.5:1.5:1, with other conditions remaining the same as in Example 3.

[0065] Example 9 Based on Example 3, the polyurethane mixed slurry was obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 8:3:2:2:1.5, with other conditions remaining the same as in Example 3.

[0066] Example 10 Based on Example 3, the polyurethane mixed slurry was obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 12:2:1:1:0.5, with other conditions remaining the same as in Example 3.

[0067] Comparative Example 1 Based on Example 3, the corona treatment in step X1 is removed, while other conditions remain the same as in Example 3.

[0068] Comparative Example 2 Based on Example 3, while keeping other conditions the same, the manufacturing process of the high water pressure resistant fabric is changed to include the following steps: X1. Unwind the nylon fabric roll, and after corona treatment, obtain the treated base fabric; X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

[0069] Comparative Example 3 Based on Example 3, while keeping other conditions the same, the manufacturing process of the high water pressure resistant fabric is changed to include the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, dry it at 175℃ for 3 minutes, cool it and roll it up to obtain a high water pressure resistant fabric.

[0070] Using the fabrics prepared in Examples 1-10 and Comparative Examples 1-3 as samples, the same area was taken and the hydrostatic pressure (mmH2O) was measured according to the ISO 811-2018 standard. The moisture permeability (g / m²) was measured according to the ASTM E96BW-1995 inverted cup method. 2 ·d), and the results are recorded in Table 1 below.

[0071] As shown in Table 1, the fabric produced by this invention has high water pressure resistance.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A manufacturing process for a high water pressure resistant fabric, characterized in that: The manufacturing process of the high water pressure resistant fabric includes the following steps: X1. Unwind the nylon fabric roll, treat it with corona, impregnate it with polyurethane liquid, and pre-dry it to obtain the treated base fabric. X2. Coat the treated base fabric surface with a polyurethane mixture, immerse in water to solidify, wash with water to remove surface chemical residues, and dry to obtain the pre-coated fabric. X3. Immerse the pre-coated fabric in the working solution, roll it, pre-dry it, dry it at a high temperature, cool it and roll it up to obtain a high water pressure resistant fabric.

2. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The nylon fabric mentioned in step X1 is nylon 66.

3. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The polyurethane liquid in step X1 is obtained by mixing solvent-based polyurethane and dimethylformamide at a mass ratio of 1:8.8-9.2; the impregnation rate is 65-75%.

4. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The corona treatment in step X1 refers to setting the power of the corona treatment machine to 3-5kW and the speed to 24-26m / min; the pre-drying refers to pre-drying at 95-105℃ for 1-2min.

5. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The coating in step X2 is achieved by controlling the gap between the doctor blade and the base fabric to be 0.17-0.19 mm; the polyurethane mixed slurry is obtained by mixing solvent-based polyurethane, dimethylformamide, polyvinyl alcohol aqueous solution, ultraviolet absorber TNK-581, and carbodiimide in a mass ratio of 9.5-10.5:2.3-2.7:1.4-1.6:1.4-1.6:0.8-1.2; the mass concentration of polyvinyl alcohol in the polyvinyl alcohol aqueous solution is 8-12 wt%.

6. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: Step X2, immersion solidification, refers to soaking in water at 33-37℃ for 2-3 minutes; the water washing temperature is 54-56℃; and the drying refers to drying at 120-130℃ for 3-4 minutes.

7. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The working fluid in step X3 is composed of fluorine-free waterproofing agent PM-3705, wetting and leveling agent XH-5018, and water in a mass ratio of 1:0.014-0.02:32-33; the padding rate is 73-77%.

8. The manufacturing process of a high water pressure resistant fabric according to claim 1, characterized in that: The pre-drying mentioned in step X3 refers to pre-drying at 85-95℃ for 1.5-2.5 minutes; the higher temperature drying refers to drying at 170-180℃ for 0.5-1.5 minutes.

9. A high water pressure resistant fabric obtained by the manufacturing process according to any one of claims 1-8.

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