Preparation method of waterproof fabric

Abstract

The invention discloses a preparation method of a waterproof fabric, and belongs to the technical field of fabrics. The specific method comprises the following steps: carrying out primary water washing, pre-shaping, dyeing treatment, secondary water washing and waterproof treatment on a woven gray fabric. The waterproof treatment process specifically comprises the following steps that the fabric subjected to secondary water washing is soaked in waterproof liquid, and the waterproof liquid is prepared from, by water, 20 g / L to 25 g / L of VAE emulsion, 16 g / L to 19 g / L of chitosan, 17 g / L to 18 g / L of G-570 silane coupling agent, 12 g / L to 15 g / L of dihydrate CD and 8 g / L to 11 g / L of TJ-A8430 waterproof promoting agent. The prepared waterproof fabric has excellent color fastness and waterproof performance.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics, and particularly relates to a method for preparing a waterproof fabric. Background Art

[0002] Nowadays, there are many kinds of fabrics on the market, and their functions are increasing. Fabrics with special functions such as waterproof, temperature sensitive, flame retardant, and UV resistance are emerging in an endless stream. Among them, waterproof fabrics are extremely important in rainy weather and some outdoor products.

[0003] The Chinese invention patent application document with application number 201810441388.7 discloses an anti-pollen waterproof fabric, in which a coating agent with waterproof and moisture-permeable functions is applied on the surface of the fabric so that the pores on the surface of the fabric are closed or reduced to a certain extent by the coating agent, thereby achieving waterproofness.

[0004] The technology of making waterproof fabrics with waterproof coatings is very effective in a short period of time, but if the coating is washed or scratched, its waterproof effect will immediately decrease. Therefore, it is necessary to design a fabric that does not use waterproof coatings and has excellent waterproof performance. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fabric that does not use a waterproof coating and has excellent waterproof performance.

[0006] The present invention adopts the following technical solution: The method for preparing waterproof fabric comprises the following steps: washing the woven grey fabric once, pre-setting, dyeing, washing it twice and waterproofing it, so as to obtain the waterproof fabric; The waterproofing process is as follows: immersing the fabric after the secondary washing in a waterproofing liquid, wherein the waterproofing liquid includes the following components according to the amount of water: 20-25 g / L of VAE emulsion, 16-19 g / L of chitosan, 17-18 g / L of G-570 silane coupling agent, 12-15 g / L of Dishuixin CD, and 8-11 g / L of TJ-A8430 waterproofing enhancer.

[0007] Furthermore, during the dyeing process, the following dyeing auxiliaries are used according to the water volume: 12-15 g / L of polydimethyldiallylammonium chloride, 9-11 g / L of alkanolamide, 9-14 g / L of epichlorohydrin, 10-12 g / L of color fixing agent PF, and 5-8 g / L of Tam FR-DA.

[0008] Furthermore, the temperature of the dyeing process is specifically as follows: After adding all dyeing auxiliaries into the dye vat, heat up to 40~50℃ at a heating rate of 2.6~2.8℃ / min, add colorant, then heat up to 90~95℃ at a heating rate of 6.1~7.5℃ / min, keep constant temperature for 10~15min, then heat up to 130~135℃ at a heating rate of 1.2~1.8℃ / min, keep constant temperature for 40~50min, finally cool down to 40~50℃ at a cooling rate of 10~12℃ / min, and take out the fabric.

[0009] Furthermore, during the primary washing process, the following primary washing aids are added according to the water volume: 1.9-2.2 g / L hydrogen peroxide, 8-11 g / L B10 softening enzyme, and 10-12 g / L T-290 degreasing agent.

[0010] Furthermore, the predetermined forming temperature is 179-186° C., the time is 20-25 seconds, and the positive overfeed is 10-13%.

[0011] Furthermore, during the secondary washing process, the following secondary washing aids are added according to the water volume: color fixing agent PF 10-12 g / L, hydrosulfite 6-7 g / L, and liquid caustic soda 4-6 g / L.

[0012] Furthermore, during the first water washing and the second water washing, the temperature is 45-50° C. and the time is 30-40 minutes.

[0013] Furthermore, the immersion time is 40-50 minutes, and the immersion temperature is 50-60°C.

[0014] Furthermore, in the weaving process, 150D polyester and 40D spandex are used for warp knitting to obtain grey fabric, the amount of polyester is 73%, the amount of spandex is 27%, and the surface density is 220g / cm 2 The yarn number of the polyester yarn is 1-0 / 2-3 / / , and the yarn number of the spandex yarn is 0-2 / 3-1 / / .

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, after washing the fabric, the fabric is dyed. By using alkanolamide and epichlorohydrin as surfactants, a mixture of polydimethyldiallyl ammonium chloride, a fixing agent PF and Tam FR-DA is added to improve the color fastness during dyeing and make the dyeing more uniform.

[0016] Second, in order to improve the waterproof performance of the fabric while improving the color fastness of the fabric, VAE emulsion, chitosan, G-570 silane coupling agent, Dishuixin CD and TJ-A8430 waterproof enhancer are mixed and used to form an effective waterproof film on the fabric fiber layer to improve the waterproof performance of the fabric.

[0017] Third, during the first washing, the combined use of B10 softening enzyme and T-290 degreasing agent can effectively improve the washing efficiency and effectively remove impurities such as oil stains, laying a solid foundation for subsequent efficient dyeing. At the same time, during the second washing, the color fixing agent PF is continued to be added to further improve the color fastness of the fabric. DETAILED DESCRIPTION

[0018] The raw materials used in the present invention are all commercially available: VAE emulsion was purchased from Zhengzhou Xinqishun Chemical Products Co., Ltd.; G-570 silane coupling agent was purchased from Wuhan Maikairui Chemical Co., Ltd.; The color fixing agent PF was purchased from Tam Color Fixing Agent PF liquid of BASF (China) Co., Ltd.; Tam FR-DA was purchased from BASF (China) Co., Ltd.; Dishuixin CD was purchased from BASF (China) Co., Ltd.; TJ-A8430 waterproof enhancer was purchased from Sichuan Tingjiang New Materials Co., Ltd.; B10 softening enzyme was purchased from BASF (China) Co., Ltd.; T-290 degreaser was purchased from Suzhou Jiesheng New Material Technology Co., Ltd. as a cold water degreaser. Example 1

[0019] The preparation method of waterproof fabric is as follows: Step 1: One wash: The woven grey fabric was washed once, and during the washing process, the following washing aids were added according to the water volume: hydrogen peroxide 1.9 g / L, B10 softening enzyme 8 g / L, T-290 degreasing agent 10 g / L, the temperature was 45°C, and the time was 30 minutes; Step 2: Pre-order: The presetting temperature is 179°C, the time is 20s, and the positive overfeed is 10%; Step 3: Dyeing: During the dyeing process, the following dyeing auxiliaries were used in terms of water volume: polydimethyldiallylammonium chloride 12 g / L, alkanolamide 9 g / L, epichlorohydrin 9 g / L, color fixative PF 10 g / L, Tam FR-DA 5 g / L; The temperature of dyeing treatment is as follows: After all dyeing auxiliaries are added into the dyeing vat, the temperature is raised to 40°C at a heating rate of 2.6°C / min, and the colorant is added. Then, the temperature is raised to 90°C at a heating rate of 6.1°C / min, and the temperature is kept constant for 10 minutes. Then, the temperature is raised to 130°C at a heating rate of 1.2°C / min, and the temperature is kept constant for 40 minutes. Finally, the temperature is lowered to 40°C at a cooling rate of 10°C / min, and the fabric is taken out. Step 4: Secondary washing: During the secondary washing process, the following secondary washing aids were added according to the water volume: color fixer PF 10 g / L, hydrosulfite 6 g / L, liquid caustic soda 4g / L, the temperature was 45°C, and the time was 30 min; Step 5: Waterproofing: The fabric after the second water washing is waterproofed to obtain the waterproof fabric. The waterproofing process is as follows: the fabric after the second water washing is immersed in the waterproof liquid for 40 minutes, the immersion temperature is 50°C, and the waterproof liquid includes the following components according to the water volume: VAE emulsion 20 g / L, chitosan 16 g / L, G-570 silane coupling agent 17 g / L, Dishuixin CD 12 g / L, TJ-A8430 waterproof enhancer 8 g / L. Example 2

[0020] The preparation method of waterproof fabric is as follows: Step 1: One wash: The woven grey fabric was washed once, and during the washing process, the following washing aids were added according to the water volume: hydrogen peroxide 2.2 g / L, B10 softening enzyme 11 g / L, T-290 degreasing agent 12 g / L, the temperature was 50°C, and the time was 40 minutes; Step 2: Pre-order: The presetting temperature is 186°C, the time is 25s, and the positive overfeed is 13%; Step 3: Dyeing: During the dyeing process, the following dyeing auxiliaries were used in terms of water volume: polydimethyldiallylammonium chloride 15 g / L, alkanolamide 11 g / L, epichlorohydrin 14 g / L, color fixative PF 12 g / L, Tam FR-DA 8 g / L; The temperature of dyeing treatment is as follows: After all dyeing auxiliaries are added to the dyeing vat, the temperature is raised to 50°C at a heating rate of 2.8°C / min, and the colorant is added. Then, the temperature is raised to 95°C at a heating rate of 7.5°C / min, and the temperature is kept constant for 15 minutes. Then, the temperature is raised to 135°C at a heating rate of 1.8°C / min, and the temperature is kept constant for 50 minutes. Finally, the temperature is lowered to 50°C at a cooling rate of 12°C / min, and the fabric is taken out. Step 4: Secondary washing: During the secondary washing process, the following secondary washing aids were added according to the water volume: color fixer PF 12 g / L, hydrosulfite 7 g / L, liquid caustic soda 6 g / L, temperature 50°C, time 40 min; Step 5: Waterproofing: The fabric after the second water washing is waterproofed to obtain the waterproof fabric. The waterproofing process is as follows: the fabric after the second water washing is immersed in the waterproof liquid for 50 minutes, the immersion temperature is 60°C, and the waterproof liquid includes the following components according to the water volume: VAE emulsion 25 g / L, chitosan 19 g / L, G-570 silane coupling agent 18 g / L, Dishuixin CD 15 g / L, TJ-A8430 waterproof enhancer 11 g / L. Example 3

[0021] The preparation method of waterproof fabric, the specific process is as follows: Step 1: One wash: The woven grey fabric was washed once, and during the washing process, the following washing aids were added according to the water volume: hydrogen peroxide 2.0 g / L, B10 softening enzyme 9 g / L, T-290 degreasing agent 11 g / L, the temperature was 50°C, and the time was 35 min; Step 2: Pre-order: The presetting temperature is 184°C, the time is 25s, and the positive overfeed is 12%; Step 3: Dyeing: During the dyeing process, the following dyeing auxiliaries were used in terms of water volume: polydimethyldiallylammonium chloride 13 g / L, alkanolamide 10 g / L, epichlorohydrin 12 g / L, color fixative PF 11 g / L, Tam FR-DA 6 g / L; The temperature of dyeing treatment is as follows: After all dyeing auxiliaries are added into the dyeing vat, the temperature is raised to 45°C at a heating rate of 2.7°C / min, and the colorant is added. Then, the temperature is raised to 93°C at a heating rate of 6.8°C / min, and the temperature is kept constant for 12 minutes. Then, the temperature is raised to 135°C at a heating rate of 1.5°C / min, and the temperature is kept constant for 45 minutes. Finally, the temperature is lowered to 50°C at a cooling rate of 11°C / min, and the fabric is taken out. Step 4: Secondary washing: During the secondary washing process, the following secondary washing aids were added according to the water volume: color fixer PF 11 g / L, hydrosulfite 4 g / L, liquid caustic soda 5 g / L, the temperature was 50°C, and the time was 35 min; Step 5: Waterproofing: The fabric after the second water washing is waterproofed to obtain the waterproof fabric. The waterproofing process is as follows: the fabric after the second water washing is immersed in the waterproof liquid for 45 minutes, the immersion temperature is 55°C, and the waterproof liquid includes the following components according to the water volume: VAE emulsion 23 g / L, chitosan 17 g / L, G-570 silane coupling agent 18 g / L, Dishuixin CD 14 g / L, TJ-A8430 waterproof enhancer 9 g / L. Comparison Example

[0022] The difference between this comparative example and Example 3 is that VAE emulsion, G-570 silane coupling agent and TJ-A8430 waterproofing enhancer were not added during the waterproofing process, and alkanolamide and Tam FR-DA were not added during the dyeing process.

[0023] In the weaving process of the grey fabrics in the above three embodiments and the comparative example, 150D polyester and 40D spandex are used for warp knitting to obtain the grey fabrics, the amount of polyester is 73%, the amount of spandex is 27%, and the surface density is 220g / cm 2 The yarn number of the polyester yarn is 1-0 / 2-3 / / , and the yarn number of the spandex yarn is 0-2 / 3-1 / / .

[0024] The colorants are disperse dyes, specifically 0.828% owf Disperse Light Yellow 6GSL 200%, 1% owf Disperse Red G and 0.07% owf Disperse Red FFB.

[0025] The waterproof fabrics prepared in the above three embodiments and the comparative example were tested, wherein: Use GB / T 3921-2008 to test the color fastness to soap washing; Use GB / T 3920-2008 to test color fastness to rubbing; Use GB / T 3922-2013 to test color fastness to perspiration; Adopt GB / 12704.1-2009 to test perspective performance; Adopt GB / 30447-2013 to test waterproof performance; The test results are shown in Table 1 below: Table 1: Test results:

[0026] As can be seen from Table 1, the waterproof fabrics prepared in Examples 1 to 3 of the present invention have better color fastness and waterproof performance than the waterproof fabrics prepared in the control example.

[0027] The above is a preferred embodiment of the present invention, and it should be noted that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. A method for preparing a waterproof fabric, characterized in that: The woven grey fabric is subjected to a first washing, a pre-setting, a dyeing treatment, a second washing and a waterproof treatment to obtain a waterproof fabric; The waterproofing process is as follows: immersing the fabric after the secondary washing in a waterproofing liquid, wherein the waterproofing liquid includes the following components according to the amount of water: 20-25 g / L of VAE emulsion, 16-19 g / L of chitosan, 17-18 g / L of G-570 silane coupling agent, 12-15 g / L of Dishuixin CD, and 8-11 g / L of TJ-A8430 waterproofing enhancer.

2. The method for preparing the waterproof fabric according to claim 1, characterized in that: During the dyeing process, the following dyeing auxiliaries are used according to the water volume: 12-15 g / L of polydimethyldiallylammonium chloride, 9-11 g / L of alkanolamide, 9-14 g / L of epichlorohydrin, 10-12 g / L of color fixing agent PF, and 5-8 g / L of Tam FR-DA.

3. The method for preparing the waterproof fabric according to claim 2, characterized in that: The temperature of the dyeing process is as follows: After adding all dyeing auxiliaries into the dye vat, first heat the temperature to 40~50℃ at a heating rate of 2.6~2.8℃ / min, add colorant, then heat the temperature to 90~95℃ at a heating rate of 6.1~7.5℃ / min, keep constant temperature for 10~15min, then heat the temperature to 130~135℃ at a heating rate of 1.2~1.8℃ / min, keep constant temperature for 40~50min, finally cool the temperature to 40~50℃ at a cooling rate of 10~12℃ / min, and take out the fabric.

4. The method for preparing the waterproof fabric according to claim 1, characterized in that: During the primary washing process, the following primary washing aids are added according to the water volume: 1.9-2.2 g / L hydrogen peroxide, 8-11 g / L B10 softening enzyme, and 10-12 g / L T-290 degreasing agent.

5. The method for preparing the waterproof fabric according to claim 1, characterized in that: The predetermined setting temperature is 179-186° C., the time is 20-25 seconds, and the positive overfeed is 10-13%.

6. The method for preparing the waterproof fabric according to claim 1, characterized in that: During the secondary washing process, the following secondary washing aids are added according to the water volume: color fixing agent PF 10-12 g / L, hydrosulfite 6-7 g / L, and liquid caustic soda 4-6 g / L.

7. The method for preparing the waterproof fabric according to claim 1, characterized in that: During the first water washing and the second water washing, the temperature is 45-50° C. and the time is 30-40 minutes.

8. The method for preparing the waterproof fabric according to claim 1, characterized in that: The immersion time is 40-50 minutes, and the immersion temperature is 50-60°C.

9. The method for preparing the waterproof fabric according to claim 1, characterized in that: In the weaving process, 150D polyester and 40D spandex are used for warp knitting to obtain grey fabric, the amount of polyester is 73%, the amount of spandex is 27%, and the surface density is 220g / cm 2 The yarn number of the polyester yarn is 1-0 / 2-3 / / , and the yarn number of the spandex yarn is 0-2 / 3-1 / / .

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