Method for warp dyeing of polyester-cotton high-elasticity yarn

Abstract

This invention belongs to the field of yarn dyeing technology, specifically relating to a method for dyeing warp beams of high-elasticity polyester-cotton yarn. The method includes a warp beam dyeing stage, a polyester dyeing stage, and a cotton dyeing stage. This invention explores and researches the winding and dyeing processes, ultimately breaking away from traditional winding methods and dyeing processes to improve the elasticity damage problem during the dyeing of Macca yarn. The warp beam sandwich provides a buffer space for yarn shrinkage, improving the elasticity of the dyed yarn. Lowering the polyester dyeing temperature, while ensuring dye uptake and colorfastness, improves yarn elasticity. The reduction and cleaning process using sodium hydrosulfite further enhances colorfastness.

Description

Technical Field

[0001] This invention belongs to the field of yarn dyeing technology, specifically relating to a method for dyeing warp beams of high-elasticity polyester-cotton yarn. Background Technology

[0002] With the development of the textile industry, new types of fibers are emerging in an endless stream. Elastic fibers, due to their moderate elasticity and flexibility, bring new vitality to clothing, catering to people's free and unrestrained consumption philosophy, and are becoming increasingly popular. As the pace of work and life continues to accelerate, people's demands for clothing comfort are constantly increasing. Clothing made of low-elastic fabrics with 20%~25% elastic elongation can cushion deformation caused by movement, increasing wearing comfort. Macaroni fiber possesses the excellent properties of both fibers—wear resistance, wrinkle resistance, and elasticity—but during dyeing and finishing processes, elastic fibers are sensitive to acids and alkalis, and their elasticity is easily damaged and lost. There is an urgent need to develop a method to improve the elasticity damage problem during the dyeing process of Macaroni warp beams. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for dyeing warp beams of polyester-cotton high elasticity yarn, which has good color fastness and high elasticity.

[0004] The warp beam dyeing method for high-elasticity polyester-cotton yarn of the present invention includes a warp beam preparation stage, a polyester dyeing stage, and a cotton dyeing stage, and the specific steps are as follows:

[0005] Shaft alignment stage:

[0006] (1) The sandwich fabric is wrapped with a warp beam and cut to the following dimensions: L: 160cm*80cm, M: 160cm*60cm, Y: 160cm*43cm, S: 160cm*40cm; the sandwich fabric is preferably produced by Zibo Langdi Trading Co., Ltd., with a weight of 540g / m². 2 Width 1665mm;

[0007] (2) Shaft forming process parameters: machine speed 350-380m / min, pressure 0N, yarn density 0.46-0.48g / cm 3 The yarn density is the measured density, and its corresponding set density is 400-420 g / dm. 3 In practice, the actual density shall prevail.

[0008] The polyester dyeing stage includes the following steps:

[0009] (1) Add chelating agent and refining agent to the main tank, stir and then add caustic soda. After maintaining the temperature at room temperature for 5-10 minutes, add hydrogen peroxide. Then pump the liquid in the main tank into the main tank, raise the temperature to 100-130℃ at 2-4℃ / min, keep it at the temperature for 10-30 minutes, and then drain the liquid.

[0010] The hydrogen peroxide is first dissolved in 20%-30% of the volume of clean water in the No. 2 material preparation tank before being added to the main auxiliary tank. The concentration of chelating agent in the main tank is 0.5-1g / L, the concentration of refining agent is 1-3g / L, the concentration of caustic soda is 1-3g / L, and the concentration of hydrogen peroxide is 3-6g / L.

[0011] (2) Pump clean water into the main cylinder, heat it to 80-100℃, keep it at that temperature for 5-15 minutes, and then drain the liquid;

[0012] (3) Add neutralizing acid and deoxygenating enzyme to the auxiliary tank, then pump the liquid in the auxiliary tank into the main tank, heat it to 50-60℃, keep it warm for 10-20 minutes, and drain the liquid;

[0013] The deoxygenase is first prepared in 20%-30% of the volume of clean water in the No. 2 material preparation tank, and then added to the main auxiliary tank; the concentration of neutralizing acid in the main tank is 0.5-1g / L, and the concentration of deoxygenase is 0.1-0.2g / L.

[0014] (4) Add dispersant and AB acid to the auxiliary tank, stir for 10-20 minutes, pump into the main tank and measure the pH value to ensure that the pH is 4-5. If the pH is too high, add AB acid; if the pH is too low, the main tank needs to be emptied, and the solution needs to be prepared and added again.

[0015] The concentration of dispersant in the master cylinder is 1.5-3 g / L, and the concentration of AB acid is 1-2 g / L;

[0016] (5) Add 40%-60% of the volume of clean water to the No. 1 material cylinder, heat it to 40℃-60℃, add dispersant and AB acid of the same volume and concentration as in step (4), and add polyester dye at the same time. Stir for 10-20 minutes, and then quantitatively inject the material into the main cylinder for 15-30 minutes.

[0017] (6) First heat the main cylinder to 70-90℃, then heat it to 120℃-130℃ at 1-2℃ / min, keep it at this temperature for 30-60min, and then drain the liquid;

[0018] (7) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 70-90℃, keep it at that temperature for 5-15 minutes, and then drain the liquid.

[0019] (8) After the water is prepared in the auxiliary tank, add caustic soda and sodium hydrosulfite, then pump it into the main tank. Heat the main tank to 70-90℃, keep it at that temperature for 10-30 minutes, and then drain the liquid.

[0020] The sodium hydrosulfite is first dissolved in 40%-60% of the volume of clean water in the No. 2 material preparation tank before being added to the main auxiliary tank; the concentration of caustic soda in the main tank is 3-4 g / L, and the concentration of sodium hydrosulfite is 3-5 g / L.

[0021] (9) Add soaping agent to the auxiliary tank and pump it into the main tank. Heat the main tank to 90-105℃ and keep it at that temperature for 10-30 minutes. Then drain the liquid. The concentration of soaping agent in the main tank is 1.0-2.0 g / L.

[0022] (10) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 70-90℃, keep it warm for 5-15 minutes, and then drain the liquid.

[0023] (11) Add acetic acid to the auxiliary tank and pump it into the main tank. Heat the main tank to 40-60℃ and keep it warm for 10-20 minutes. Then drain the liquid. The concentration of acetic acid in the main tank is 1-3 g / L.

[0024] The cotton dyeing stage includes the following steps:

[0025] (1) Add dyeing bath auxiliaries and refining agents to the large auxiliary tank, pump them into the main tank and heat them to 70-90℃, keep them warm for 10-30 minutes, and then drain the liquid;

[0026] The concentration of dyeing and scouring bath auxiliaries in the main vat is 0.3-1 g / L, and the concentration of refining agent is 0.3-1 g / L;

[0027] (2) Pump clean water into the main cylinder, wash it for 10-15 minutes, and drain it;

[0028] (3) Add sodium sulfate and leveling agent to the large auxiliary tank, stir for 10-20 minutes, pump it into the main tank and heat it to 40-60℃, keep it warm for 10-20 minutes, measure the pH value and ensure that the pH is 10-11. At the same time, you need to test the flow rate by hand. Place your hand on the upper part of the warp shaft and you can feel the liquid flow rate and the liquid can wet your hand.

[0029] The concentration of leveling agent in the master dyeing vat is 1.5-3 g / L;

[0030] (4) Add 40%-60% of the volume of clean water to the No. 1 material cylinder, heat it to 80-100℃, add cotton dye, stir for 10-20 minutes, and then quantitatively inject the material into the main cylinder for 10-30 minutes.

[0031] (5) After the injection is completed, the main cylinder is heated to 60℃-90℃ at 1-3℃ / min and then kept at that temperature for 30-60min;

[0032] (6) Add 40%-60% of the volume of clean water to the No. 2 material tank, add soda ash, stir for 15-25 minutes, quantitatively inject material into the main tank for 20-40 minutes, keep the main tank warm for 50-70 minutes, and drain the liquid;

[0033] (7) Add soaping agent to the auxiliary tank, pump it into the main tank, heat the main tank to 90-105℃, keep it at that temperature for 10-20 minutes, and then drain the liquid;

[0034] The concentration of soap in the main tank is 1.0-2.0 g / L;

[0035] (8) Pump clean water into the main cylinder, wash it for 10-20 minutes, and drain it;

[0036] (9) Add fixing agent and textile acid to the large auxiliary cylinder and pump it into the main cylinder; add smoothing agent to the No. 2 material cylinder and pump it into the main cylinder. Heat the main cylinder to 40-60℃, keep it warm for 10-30 minutes, drain the liquid, and the dyeing of polyester-cotton high elastic yarn can be completed.

[0037] The amount of fixing agent in the master cylinder is 2.0-5.0% owf, the concentration of textile acid is 0.3-1 g / L, and the concentration of smoothing agent is 3-5 g / L.

[0038] Preferably, the following adjuvants are used:

[0039]

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. Due to the inherent characteristics of elastic fibers, improper dyeing conditions can cause them to become brittle, thus affecting their elasticity. This invention explores and researches the winding and dyeing processes, while also considering the elasticity, strength, and colorfastness of polyester-cotton high-elasticity fibers. Ultimately, it breaks away from traditional winding methods and dyeing processes to improve the problem of elasticity damage during the dyeing of Macaroni warp beams.

[0042] 2. When dyeing high-elasticity polyester-cotton fibers with a warp beam, the tension on the yarn under high temperature conditions should be reduced. Otherwise, the elasticity recovery of the fiber will be greatly affected after being stretched. The warp beam sandwich of this invention provides a buffer space for yarn shrinkage, which helps the fiber to remain in a relaxed state during the dyeing process and improves the elasticity of the dyed yarn.

[0043] 3. Lowering the dyeing temperature improves yarn elasticity while ensuring dye uptake and colorfastness. The reduction cleaning with sodium hydrosulfite has a good effect on removing floating color, and the reduction cleaning temperature and time used can help improve colorfastness. Detailed Implementation

[0044] The present invention will be further described below with reference to embodiments.

[0045] It should be noted that all raw materials used in the examples, unless otherwise specified, were commercially available.

[0046] Example 1

[0047] The warp beam dyeing method for high-elasticity polyester-cotton yarn of the present invention includes a warp beam preparation stage, a polyester dyeing stage, and a cotton dyeing stage, and the specific steps are as follows:

[0048] 1. Shaft alignment stage:

[0049] (1) Wrap the sandwich material with a warp beam. Cut the sandwich to the following dimensions: L: 160cm*80cm, M: 160cm*60cm, Y: 160cm*43cm, S: 160cm*40cm; The sandwich fabric was purchased from Zibo Langdi Trading Co., Ltd., with a weight of 540g / m². 2 Width 1665mm;

[0050] (2) Shafting process parameters: machine speed is 380m / min, pressure is 0N, yarn density: density is set to 420g / dm 3 The measured density is 0.48 g / cm³. 3 .

[0051] 2. The polyester dyeing stage includes the following steps:

[0052] (1) Add chelating agent and refining agent to the main tank, stir for 30 seconds, add caustic soda, keep at room temperature for 5 minutes, add hydrogen peroxide, then pump the liquid in the main tank into the main tank, heat to 110℃ at 3℃ / min, keep at the temperature for 20 minutes, and drain the liquid.

[0053] The hydrogen peroxide is first prepared by adding 20% ​​of the volume of clean water to the No. 2 material tank preparation tank before being added to the main auxiliary tank. The concentration of chelating agent in the main tank is 0.5 g / L, the concentration of refining agent is 2 g / L, the concentration of caustic soda is 2 g / L, and the concentration of hydrogen peroxide is 4 g / L.

[0054] (2) Pump clean water into the main cylinder, heat it to 90°C, keep it at that temperature for 10 minutes, and then drain the liquid;

[0055] (3) Add neutralizing acid and deoxygenating enzyme to the auxiliary tank, then pump the liquid in the auxiliary tank into the main tank, heat it to 55°C, keep it warm for 15 minutes, and drain the liquid.

[0056] The deoxygenase is first prepared in 20% of the volume of clean water in the No. 2 material preparation tank, and then added to the main auxiliary tank; the concentration of neutralizing acid in the main tank is 0.7 g / L, and the concentration of deoxygenase is 0.15 g / L.

[0057] (4) Add dispersant and AB acid to the auxiliary tank, stir for 15 min, pump into the main tank and measure the pH value to be 4.5;

[0058] The concentration of dispersant in the master cylinder is 2 g / L, and the concentration of AB acid is 1.5 g / L;

[0059] (5) Add 50% of the volume of clean water to the No. 1 material cylinder, heat it to 50°C, add dispersant and AB acid of the same volume and concentration as in step (4), and add polyester dye at the same time. After stirring for 15 minutes, inject the material into the main cylinder quantitatively for 20 minutes.

[0060] Polyester dyes include NBSWF 0.11%owf, RSWF 0.626%owf, and YSWF 0.516%owf;

[0061] (6) The main cylinder is first heated to 80°C, then heated to 125°C at 1°C / min, and kept at that temperature for 50 minutes before draining the liquid;

[0062] (7) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 90°C, keep it at that temperature for 10 minutes, and then drain the liquid.

[0063] (8) After the water is prepared in the auxiliary tank, add caustic soda and sodium hydrosulfite, then pump it into the main tank. Heat the main tank to 80°C, keep it at that temperature for 20 minutes, and then drain the liquid.

[0064] The sodium hydrosulfite is first dissolved in 50% of the volume of clean water in the No. 2 material preparation tank before being added to the main auxiliary tank; the concentration of caustic soda in the main tank is 4 g / L, and the concentration of sodium hydrosulfite is 3.5 g / L.

[0065] (9) Add soaping agent to the auxiliary tank and pump it into the main tank. Heat the main tank to 98°C, keep it at that temperature for 15 minutes, and then drain the liquid. The concentration of soaping agent in the main tank is 1.0 g / L.

[0066] (10) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 80°C, keep it at that temperature for 10 minutes, and then drain the liquid.

[0067] (11) Add acetic acid to the auxiliary tank and pump it into the main tank. Heat the main tank to 50°C, keep it warm for 15 minutes, and then drain the liquid. The concentration of acetic acid in the main tank is 2 g / L.

[0068] 3. The cotton dyeing stage includes the following steps:

[0069] (1) Add dyeing bath auxiliaries and refining agents to the large auxiliary tank, pump it into the main tank and heat it to 80°C, keep it warm for 20 minutes, and then drain the liquid;

[0070] The concentration of dyeing and scouring bath auxiliaries in the main vat is 1 g / L, and the concentration of refining agent is 1 g / L;

[0071] (2) Pump clean water into the main cylinder, wash it for 10 minutes, and drain it;

[0072] (3) Add sodium sulfate and leveling agent to the large auxiliary tank, stir for 15 min, pump it into the main tank and heat it to 60℃, keep it at that temperature for 10 min, measure the pH value to be 10.5, and test the flow rate by hand; the concentration of leveling agent in the main tank is 2 g / L;

[0073] (4) Add 50% of the volume of clean water to the No. 1 material cylinder, heat it to 90°C, add cotton dye, stir for 20 minutes, and then inject the material into the main cylinder in a quantitative manner for 10 minutes.

[0074] Cotton dyes include NXGN 0.47% owf, RX6BN 4% owf, and YX4RN 1.32% owf;

[0075] (5) After the injection is completed, the main cylinder is heated to 90°C at 2°C / min and then kept warm in the main cylinder for 30min;

[0076] (6) Add 50% of the volume of clean water to the No. 2 material tank, add soda ash, stir for 20 minutes, quantitatively inject material into the main tank for 30 minutes, keep the main tank warm for 60 minutes, and drain the liquid;

[0077] (7) Add soaping agent to the auxiliary tank, pump it into the main tank, heat the main tank to 98°C, keep it at that temperature for 15 minutes, and then drain the liquid;

[0078] The concentration of soap in the main tank is 1.0 g / L;

[0079] (8) Pump clean water into the main cylinder, wash it for 10 minutes, and drain it;

[0080] (9) Add fixing agent and textile acid to the large auxiliary cylinder and pump it into the main cylinder; add smoothing agent to the No. 2 material cylinder and pump it into the main cylinder. Heat the main cylinder to 55°C, keep it warm for 21 minutes, and drain the liquid to complete the dyeing of polyester-cotton high elastic yarn.

[0081] The amount of fixing agent in the master cylinder is 4.0% owf, the concentration of textile acid is 0.6 g / L, and the concentration of smoothing agent is 3 g / L.

[0082] The following additives are used:

[0083]

[0084] Example 2

[0085] The warp beam dyeing method for polyester-cotton high-elasticity yarn described in this invention is the same as in Example 1, except that the following dye is used:

[0086] Polyester dyes include NGRL-C 1.5% owf, BK-BFE 3.5% owf, and YSWF 0.7% owf;

[0087] Cotton dyes include BKSRFD 5%owf, RK3BS 0.5%owf, and YK3RS 1%owf.

[0088] Example 3

[0089] The warp beam dyeing method for polyester-cotton high-elasticity yarn described in this invention is the same as in Example 1, except that the following dye is used:

[0090] Polyester dyes include NBSWF 0.11%owf, RSWF 0.626%owf, and YSWF 0.516%owf;

[0091] Cotton dyes include NXGN 0.47%owf, RX6BN 4%owf, and YX4RN 1.32%owf.

[0092] Comparative Example 1

[0093] The warp beam dyeing method for polyester-cotton high elasticity yarn described in this invention is similar to Example 1, except that the warp beam is not sandwiched.

[0094] Comparative Example 2

[0095] The warp beam dyeing method for polyester-cotton high elastic yarn of the present invention is similar to Example 1, except that the main cylinder is heated to 135°C in step (6) of the polyester dyeing stage.

[0096] Comparative Example 3

[0097] The warp beam dyeing method for high elastic polyester-cotton yarn described in this invention is similar to Example 1, except that the concentration of sodium hydrosulfite in step (8) of the polyester dyeing stage is 2 g / L.

[0098] Staining performance test

[0099] The dyeing performance of the yarns from Examples 1-2 and Comparative Examples 1-3 was tested, and the results are shown in Table 1.

[0100] Table 1

[0101]

[0102] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for dyeing the warp beam of a polyester-cotton high-elasticity yarn, characterized in that: This includes the spinning stage, the polyester dyeing stage, and the cotton dyeing stage; During the warp beam stage, the warp beam is wrapped with sandwich fabric; The spindle assembly process parameters are as follows: machine speed 350-380 m / min, pressure 0 N, and yarn density 0.46-0.48 g / cm³. 3 ; The polyester dyeing stage includes the following steps: (1) Add chelating agent and refining agent to the main auxiliary tank, stir and then add caustic soda. After maintaining the temperature at room temperature for 5-10 minutes, add hydrogen peroxide. Then, pump the liquid in the main auxiliary tank into the main tank, raise the temperature to 100-130℃ at 2-4℃ / min, keep it at the temperature for 10-30 minutes, and drain the liquid. (2) Pump clean water into the main cylinder, heat it to 80-100℃, keep it at that temperature for 5-15 minutes, and then drain the liquid; (3) Add neutralizing acid and deoxygenating enzyme to the auxiliary tank, then pump the liquid in the auxiliary tank into the main tank, heat it to 50-60℃, keep it warm for 10-20 minutes, and drain the liquid; (4) Add dispersant and AB acid to the auxiliary tank, stir for 10-20 minutes, pump into the main tank and measure the pH value to ensure that the pH is 4-5; (5) Add 40%-60% of the volume of clean water to the No. 1 material cylinder, heat it to 40℃-60℃, add dispersant and AB acid of the same volume and concentration as in step (4), and add polyester dye at the same time. Stir for 10-20 minutes, and then quantitatively inject the material into the main cylinder for 15-30 minutes. (6) First heat the main cylinder to 70-90℃, then heat it to 120℃-130℃ at 1-2℃ / min, keep it at this temperature for 30-60min, and then drain the liquid; (7) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 70-90℃, keep it at that temperature for 5-15 minutes, and then drain the liquid. (8) After the water is prepared in the auxiliary tank, add caustic soda and sodium hydrosulfite, then pump it into the main tank. Heat the main tank to 70-90℃, keep it at that temperature for 10-30 minutes, and then drain the liquid. (9) Add soaping agent to the auxiliary tank and pump it into the main tank. Heat the main tank to 90-105℃ and keep it at that temperature for 10-30 minutes. Then drain the liquid. The concentration of soaping agent in the main tank is 1.0-2.0 g / L. (10) Prepare clean water in the auxiliary tank and pump it into the main tank. Heat the water to 70-90℃, keep it warm for 5-15 minutes, and then drain the liquid. (11) Add acetic acid to the auxiliary tank and pump it into the main tank. Heat the main tank to 40-60℃ and keep it warm for 10-20 minutes. Then drain the liquid. The concentration of acetic acid in the main tank is 1-3 g / L.

2. The method for dyeing the warp beam of polyester-cotton high-elasticity yarn according to claim 1, characterized in that: In step (1), hydrogen peroxide is first dissolved in 20%-30% of the volume of clean water in the No. 2 material preparation tank, and then added to the main auxiliary tank; the concentration of chelating agent in the main tank is 0.5-1g / L, the concentration of refining agent is 1-3g / L, the concentration of caustic soda is 1-3g / L, and the concentration of hydrogen peroxide is 3-6g / L; In step (3), the deoxygenase is first prepared in 20%-30% of the volume of clean water in the No. 2 material preparation tank, and then added to the main auxiliary tank; the concentration of neutralizing acid in the main tank is 0.5-1g / L, and the concentration of deoxygenase is 0.1-0.2g / L; In step (4), the concentration of the dispersant in the main cylinder is 1.5-3 g / L, and the concentration of AB acid is 1-2 g / L.

3. The method for dyeing the warp beam of polyester-cotton high-elasticity yarn according to claim 1, characterized in that: In step (8), sodium hydrosulfite is first dissolved in 40%-60% of the volume of clean water in the No. 2 material preparation tank, and then added to the main auxiliary tank; the concentration of caustic soda in the main tank is 3-4 g / L, and the concentration of sodium hydrosulfite is 3-5 g / L.

4. The method for dyeing the warp beam of polyester-cotton high-elasticity yarn according to claim 1, characterized in that: The cotton dyeing stage includes the following steps: (1) Add dyeing bath auxiliaries and refining agents to the large auxiliary tank, pump them into the main tank and heat them to 70-90℃, keep them warm for 10-30 minutes, and then drain the liquid; (2) Pump clean water into the main cylinder, wash it for 10-15 minutes, and drain it; (3) Add sodium sulfate and leveling agent to the large auxiliary tank, stir for 10-20 min, pump it into the main tank and heat it to 40-60℃, keep it warm for 10-20 min, measure the pH value and ensure that the pH is 10-11. (4) Add 40%-60% of the volume of clean water to the No. 1 material cylinder, heat it to 80-100℃, add cotton dye, stir for 10-20 minutes, and then quantitatively inject the material into the main cylinder for 10-30 minutes. (5) After the injection is completed, the main cylinder is heated to 60℃-90℃ at 1-3℃ / min and then kept at that temperature for 30-60min; (6) Add 40%-60% of the volume of clean water to the No. 2 material tank, add soda ash, stir for 15-25 minutes, quantitatively inject material into the main tank for 20-40 minutes, keep the main tank warm for 50-70 minutes, and drain the liquid; (7) Add soaping agent to the auxiliary tank, pump it into the main tank, heat the main tank to 90-105℃, keep it at that temperature for 10-20 minutes, and then drain the liquid; (8) Pump clean water into the main cylinder, wash it for 10-20 minutes, and drain it; (9) Add fixing agent and textile acid to the main auxiliary cylinder and pump them into the main cylinder; add smoothing agent to the No. 2 material cylinder and pump it into the main cylinder. Heat the main cylinder to 40-60℃, keep it warm for 10-30 minutes, and drain the liquid to complete the dyeing of polyester-cotton high elastic yarn.

5. The method for dyeing the warp beam of polyester-cotton high-elasticity yarn according to claim 4, characterized in that: In step (1), the concentration of the dyeing bath auxiliaries in the main vat is 0.3-1 g / L, and the concentration of the refining agent is 0.3-1 g / L; In step (3), the concentration of leveling agent in the main dyeing vat is 1.5-3 g / L; In step (7), the concentration of soaping agent in the main tank is 1.0-2.0 g / L; In step (9), the amount of fixing agent in the main cylinder is 2.0-5.0% owf, the concentration of textile acid is 0.3-1 g / L, and the concentration of smoothing agent is 3-5 g / L.

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