After-finishing processing technology for improving mixing color fastness of yarn-dyed black pure cotton fabric

Abstract

The invention belongs to the technical field of textile printing and dyeing, and particularly relates to an after-finishing processing technology for improving the mixing color fastness of a yarn-dyed black pure cotton fabric. Comprising the following steps of singeing, desizing, mercerizing, washing, tentering and preshrinking, in the water washing process, adopted water washing equipment comprises a material tank and 10 water washing tanks arranged in sequence, overflow water is adopted in the seventh water washing tank and the eighth water washing tank, the overflow water amount is 2000-3000 L / h, and the water washing temperature is 70-85 DEG C; the washing temperature of the second to sixth washing tanks is 80-90 DEG C; an anti-staining soaping agent Sinole RC-335 needs to be added into the material tank; in the tentering process, a color fixing agent ALBAFIXECO needs to be added. By adding the anti-staining soaping agent and optimizing the washing condition, the flooding and after-staining phenomena are effectively prevented, and the washing effect is ensured. In addition, a color fixing agent is added in the tentering process, the problem of flooding of the cloth cover is further solved, and the quality of the fabric is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a post-finishing processing technology for improving the agitation and floating color fastness of a yarn-dyed black pure cotton fabric. Background Art

[0002] Cotton fiber has become one of the most widely used textile raw materials due to its excellent wearing properties such as moisture absorption and breathability, soft feel, and comfort. In the processing of cotton fiber, reactive dyes are used for dyeing, and the post-finishing process includes mercerization (liquid ammonia) process. However, reactive dyes will hydrolyze when exposed to strong alkali, resulting in discoloration. Although the presence of fixing agents can slow down this process to a certain extent, the hydrolyzed dyes will still be re-adsorbed on the surface of the fabric to form floating colors. To address this problem, it is necessary to adjust the post-finishing process accordingly through experiments.

[0003] For yarn-dyed fabrics, especially black ones, the mercerizing (liquid ammonia) process in the post-finishing process can significantly improve the gloss and shrinkage of the fabric, but it also has a certain impact on the fastness of the dye. Since the dye concentration used in black fabrics is high, its hydrolysis degree is greater and the floating color problem is more serious. Especially after the garment is made, this problem may cause staining of other fabrics. Therefore, it is urgent to develop an improved post-finishing process to improve the floating color fastness of yarn-dyed black pure cotton fabrics and ensure the color stability of the fabric during processing and use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a finishing process for improving the color fastness of yarn-dyed black pure cotton fabrics. By adding the anti-staining soaping agent Sinmorle RC-335 during the washing process and optimizing the washing conditions, the floating color back-staining phenomenon is effectively prevented, ensuring the washing effect. In addition, the color fixing agent ALBAFIX is added in the stentering process. ® ECO further improves the floating color problem on the fabric and improves the fabric quality. This process is not only simple and convenient, but also can significantly improve the color fastness to agitation and washing of the yarn-dyed black pure cotton fabric, enhancing the practicality and durability of the fabric.

[0005] The technical solution adopted by the present invention is as follows: The post-finishing process for improving the color fastness of the yarn-dyed black pure cotton fabric includes the following steps: singeing - desizing - mercerizing - washing - stentering - pre-shrinking; In the washing process, the washing equipment used includes a material tank and 10 washing tanks arranged in sequence. The 7th and 8th washing tanks use overflow water with an overflow water volume of 2000~3000L / h and a washing temperature of 70~85℃; the washing temperature of the 2nd to 6th washing tanks is 80~90℃; the anti-staining soaping agent Sinmorle RC-335 needs to be added to the material tank; In the stentering process, it is necessary to add the fixing agent ALBAFIX ® ECO.

[0006] The singeing process has a vehicle speed of 90-110 m / min, a burner position of 1# to 3#, and a flame intensity of 10-14 mbar.

[0007] The steamer temperature of the desizing process is 95-98°C, the water washing temperature is 85-95°C, and the vehicle speed is 80-85m / min.

[0008] In the mercerizing process, the alkali concentration is 18 to 25 degrees Baume.

[0009] A liquid ammonia process is also included between the mercerizing and water washing processes. The vehicle speed of the liquid ammonia process is 35-55 m / min, and the water washing temperature is room temperature.

[0010] The vehicle speed of the water washing process is 40-50 m / min, wherein the first and tenth water washing tanks are not heated, and the ninth water washing tank is an acid tank and is not heated.

[0011] In the washing process, the dosage of the anti-staining soaping agent Sinmorle RC-335 is 10-20 g / L.

[0012] The vehicle speed of the stentering process is 50-60 m / min, and the drying room temperature is 100-120°C.

[0013] In the tentering process, the fixing agent ALBAFIX ® The dosage of ECO is 10~20g / L.

[0014] The temperature of the rubber blanket in the pre-shrinking process is 100-110°C, the temperature of the wool blanket is 110-120°C, and the vehicle speed is 40-50m / min.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The post-finishing process for improving the color fastness of the yarn-dyed black pure cotton fabric described in the present invention can significantly improve the color fastness of the yarn-dyed black pure cotton fabric, and also help to improve the color fastness of the finished product to washing, thereby reducing the risks that may exist in the production process of ready-made clothes. This method is not only simple in process and easy to operate, but also can ensure that the ready-made clothes will not have color staining problems after washing or home washing, greatly improving the practicality and durability of the fabric; (2) The present invention effectively prevents the floating color from returning by adding the anti-staining soaping agent Sinmorle RC-335 during the washing process. At the same time, the washing effect is further enhanced after the washing tank is heated up, and the floating color is effectively washed away. In the two washing tanks before the acid tank, the overflow water volume is increased and the washing tank temperature is strictly controlled to wash the floating color more thoroughly, thereby ensuring the washing effect; (3) The present invention adds a color fixing agent ALBAFIX in the tentering process after the water washing process. ® ECO has once again improved the problem of floating color on the fabric, further improving the quality of the fabric. DETAILED DESCRIPTION

[0016] The present invention is further described below with reference to the embodiments, but they do not limit the implementation of the present invention.

[0017] The raw materials used in the examples and comparative examples are conventional commercially available raw materials unless otherwise specified, and the process methods used in the examples and comparative examples are conventional methods in the art unless otherwise specified.

[0018] Some of the raw materials used in the examples and comparative examples are described as follows: Anti-staining soaping agent Sinmorle RC-335, purchased from Shanghai Liming Additives Co., Ltd.; Anti-staining soap detergent ZS-CW, purchased from Beijing Kaikerui Chemical New Materials Co., Ltd.; Fixing agent ALBAFIX ® ECO was purchased from Huntsman Textile Effects (China) Co., Ltd.

[0019] Fixing agent FSN, purchased from Graebert (Tianjin) Chemical Co., Ltd.; Fixing agent FA-R was purchased from Zibo Lurui Fine Chemical Co., Ltd.

[0020] Example 1 The specifications of the black pure cotton fabric are BCICPT50×BCICPT50×144×75×57, the weave is 1 / 1, and the finishing method is ordinary finishing; The subsequent finishing process includes the following steps: (1) Singeing: the machine speed is 105m / min, the burner position is 1#, and the flame intensity is 14mbar; (2) Desizing: steamer temperature is 98°C, water washing temperature is 95°C, and machine speed is 80 m / min; (3) Mercerization: alkali concentration is 18 degrees Baume; (4) Water washing: The water washing equipment used includes a material tank and 10 water washing tanks arranged in sequence. The vehicle speed is 50m / min. The first and tenth water washing tanks are not heated. The ninth water washing tank is an acid tank and is not heated. The water washing temperature of the second to sixth water washing tanks is 90°C. The seventh and eighth water washing tanks use overflow water with an overflow water volume of 2500L / h. The water washing temperature of the seventh and eighth water washing tanks is 80°C. 15g / L of anti-stain soaping agent Sinmorle RC-335 needs to be added to the material tank. (5) Tentering: The speed is 50m / min, the drying room temperature is 100℃, and 10g / L of the color fixing agent ALBAFIX needs to be added. ® ECO; (6) Preshrinkage: The temperature of the rubber blanket in the preshrinkage process is 100°C, the temperature of the wool blanket is 110°C, and the machine speed is 50m / min.

[0021] Example 2 The specifications of the black pure cotton fabric are CPT80 / 2×CPT80 / 2×134×96×58, the weave is high denim 8 / 6, and the finishing method is ordinary finishing; The subsequent finishing process includes the following steps: (1) Singeing: speed is 95m / min, burner position is 2#, flame intensity is 12mbar; (2) Desizing: steamer temperature is 97°C, water washing temperature is 85°C, and machine speed is 85 m / min; (3) Mercerization: alkali concentration is 25 degrees Baume; (4) Water washing: The water washing equipment used includes a material tank and 10 water washing tanks arranged in sequence. The vehicle speed is 40m / min. The first and tenth water washing tanks are not heated. The ninth water washing tank is an acid tank and is not heated. The water washing temperature of the second to sixth water washing tanks is 80°C. The seventh and eighth water washing tanks use overflow water with an overflow water volume of 2300L / h. The water washing temperature of the seventh and eighth water washing tanks is 85°C. 20g / L of anti-stain soaping agent Sinmorle RC-335 needs to be added to the material tank. (5) Tentering: The speed is 55m / min, the drying room temperature is 115℃, and 15g / L of the color fixing agent ALBAFIX needs to be added. ® ECO; (6) Preshrinkage: The temperature of the rubber blanket in the preshrinkage process is 110°C, the temperature of the wool blanket is 120°C, and the machine speed is 40m / min.

[0022] Example 3 The specifications of the black pure cotton fabric are CPT40×CPT40 / 2×100×50×57, the structure is 2 / 2CP, and the finishing method is liquid ammonia finishing; The subsequent finishing process includes the following steps: (1) Singeing: the machine speed is 100m / min, the burner position is 3#, and the flame intensity is 14mbar; (2) Desizing: steamer temperature is 95°C, water washing temperature is 90°C, and machine speed is 85 m / min; (3) Mercerization: alkali concentration is 21 degrees Baume; (4) Liquid ammonia: vehicle speed is 45 m / min, water washing temperature is room temperature (5) Water washing: The water washing equipment used includes a material tank and 10 water washing tanks arranged in sequence. The vehicle speed is 45m / min. The first and tenth water washing tanks are not heated. The ninth water washing tank is an acid tank and is not heated. The water washing temperature of the second to sixth water washing tanks is 85°C. The seventh and eighth water washing tanks use overflow water with an overflow water volume of 3000L / h. The water washing temperature of the seventh and eighth water washing tanks is 70°C. 20g / L of anti-stain soaping agent Sinmorle RC-335 needs to be added to the material tank. (6) Tentering: The speed is 50m / min, the drying room temperature is 120℃, and 20g / L of the color fixing agent ALBAFIX needs to be added. ® ECO; (7) Preshrinkage: The temperature of the rubber blanket in the preshrinkage process is 110°C, the temperature of the wool blanket is 120°C, and the machine speed is 50m / min.

[0023] Comparative Example 1 The difference from Example 1 is that in the water washing process, the water washing temperature of the 2nd to 6th water washing tanks is 60°C, and the water washing temperature of the 7th and 8th water washing tanks is 50°C. The rest is the same as Example 1.

[0024] Comparative Example 2 The difference from Example 3 is that in the water washing process, the 7th and 8th water washing tanks use overflow water, and the overflow water volume is 1500L / h. The rest is the same as Example 3.

[0025] Comparative Example 3 The difference from Example 2 is that in the water washing process, the anti-sticking soaping agent added to the material tank is ZS-CW, and the rest is the same as Example 2.

[0026] Comparative Example 4 The difference from Example 2 is that in the tentering process, the color fixing agent added is FSN, and the rest is the same as Example 2.

[0027] Comparative Example 5 The difference from Example 2 is that in the tentering process, the color fixing agent added is FA-R, and the rest is the same as Example 2.

[0028] The fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were tested for performance, and the testing methods were as follows: The test method for floating color fastness is as follows: take 5g of AATCC1993 standard detergent (WOB), dissolve it to 1L with grade 3 water, and preheat it to 40±2℃ to obtain a test solution. Then take 8±2g of fabric and place it in a beaker, place the beaker on a horizontal rotator, add the test solution according to a bath ratio of 40:1, ensure that the temperature is maintained at 40±2℃, and stir at a frequency of 260±5r / min for 5min. During this period, it is also necessary to manually stir with a glass rod in a clockwise direction for 10s, then in a counterclockwise direction for 10s, and so on alternately for a total of 5min. After the test, let the solution stand for 5min, and then take 250mL of the upper clear solution (placed on the right) and 250mL of the original solution (placed on the left) for comparison. When comparing, place the beaker scale line to the side, use the D65 light box table as the base, and three layers of unstained white cotton cloth as the background, and place the two solutions 10cm in front of the white paper card. Under D65 light source, at a level viewing angle, the rating is completed within 30 minutes by comparing with sample photos.

[0029] Color fastness to washing: tested according to AATCC 61-2013 e2 (2020); Color fastness: tested according to the Japanese Daimaru method; The test results are shown in Table 1.

[0030] Table 1 Performance test results

[0031] It can be seen from the test data in Table 1 that each test item in the fabric performance test prepared in Examples 1 to 3 meets the qualified standards.

[0032] In Comparative Example 1, due to the decrease in washing temperature, the floating color of the dye on the fabric could not be completely washed away, resulting in residues on the fabric, which in turn caused fastness problems of the finished product, affecting the floating color fastness, washing color fastness and color weeping fastness.

[0033] In Comparative Example 2, due to the reduction in the amount of overflow water for washing, the floating color of the dye on the fabric fell into the water at high temperature. Due to insufficient water volume and insufficient washing, the floating color was re-adsorbed onto the fabric, affecting the floating color fastness, washing color fastness and color weeping fastness.

[0034] In Comparative Example 3, due to the replacement of the type of anti-staining soap detergent, in the washing tank, the floating color produced after the fabric falls into the water is difficult to effectively prevent from re-attaching to the fabric, causing the floating color in the water to stain the fabric surface again, thereby affecting the floating color fastness and color weeping fastness.

[0035] In Comparative Examples 4 and 5, due to the replacement of the types of stenter fixing agents, the floating color remaining on the fabric during the stentering process cannot be well fixed on the fabric, but floats on the surface of the fabric and easily falls off after contacting water, affecting the floating color fastness and color fastness.

Claims

1. A finishing process for improving the color fastness of yarn-dyed black pure cotton fabric, characterized in that: It includes the following processes: singeing - desizing - mercerizing - washing - stentering - pre-shrinking; In the washing process, the washing equipment used includes a material tank and 10 washing tanks arranged in sequence. The 7th and 8th washing tanks use overflow water with an overflow water volume of 2000~3000L / h and a washing temperature of 70~85℃; the washing temperature of the 2nd to 6th washing tanks is 80~90℃; the anti-staining soaping agent Sinmorle RC-335 needs to be added to the material tank; In the stentering process, it is necessary to add the fixing agent ALBAFIX ® ECO.

2. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: The singeing process has a vehicle speed of 90-110 m / min, a burner position of 1# to 3#, and a flame intensity of 10-14 mbar.

3. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: The steamer temperature of the desizing process is 95-98°C, the water washing temperature is 85-95°C, and the vehicle speed is 80-85m / min.

4. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: In the mercerizing process, the alkali concentration is 18 to 25 degrees Baume.

5. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: A liquid ammonia process is also included between the mercerizing and water washing processes. The vehicle speed of the liquid ammonia process is 35-55 m / min, and the water washing temperature is room temperature.

6. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: The vehicle speed of the water washing process is 40-50 m / min, wherein the first and tenth water washing tanks are not heated, and the ninth water washing tank is an acid tank and is not heated.

7. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: In the washing process, the dosage of the anti-staining soaping agent Sinmorle RC-335 is 10-20 g / L.

8. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: The speed of the tentering process is 50-60 m / min, and the drying room temperature is 100-120°C.

9. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: In the tentering process, the fixing agent ALBAFIX ® The dosage of ECO is 10~20g / L.

10. The post-finishing process for improving the color fastness of yarn-dyed black pure cotton fabric according to claim 1, characterized in that: The temperature of the rubber blanket in the pre-shrinking process is 100-110°C, the temperature of the wool blanket is 110-120°C, and the vehicle speed is 40-50m / min.

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