Post-finishing process for improving the floating color fastness of yarn-dyed black cotton fabric

Abstract

The present invention belongs to the technical field of textile printing and dyeing, and particularly relates to a post-finishing processing technology for improving the floating color fastness of yarn-dyed black pure cotton fabrics. It includes the following processes: singeing - desizing - mercerizing - washing - stentering - preshrinking; in the washing process, the washing equipment used includes a feed tank and 10 washing tanks arranged in sequence. Among them, the 7th and 8th washing tanks use overflow water, and the overflow water volume is 2000 - 3000 L / h, and the washing temperature is 70 - 85 °C; the washing temperature of the 2nd - 6th washing tanks is 80 - 90 °C; an anti-staining soap detergent Sinmorle RC-335 needs to be added to the feed tank; in the stentering process, a fixing agent ALBAFIX ® ECO needs to be added. By adding an anti-staining soap detergent and optimizing the washing conditions, the phenomenon of floating color redeposition is effectively prevented, and the washing effect is ensured. In addition, by adding a fixing agent in the stentering process, the problem of floating color on the fabric surface is further improved, and the fabric quality is enhanced.

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:

[0006] 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;

[0007] In the water washing process, the water washing equipment used includes a material tank and 10 water washing tanks arranged in sequence. Among them, the 7th and 8th water washing tanks use overflow water, the overflow water volume is 2000 - 3000 L / h, and the water washing temperature is 70 - 85 °C; the water washing temperature of the 2nd - 6th water washing tanks is 80 - 90 °C; an anti-staining soap detergent Sinmorle RC-335 needs to be added to the material tank.

[0008] In the stentering process, a fixing agent ALBAFIX ® ECO needs to be added.

[0009] The vehicle speed of the singeing process described is 90 - 110 m / min, the position of the burner is 1 - 3#, and the flame intensity is 10 - 14 mbar.

[0010] The steaming box temperature of the desizing process described is 95 - 98 °C, the water washing temperature is 85 - 95 °C, and the vehicle speed is 80 - 85 m / min.

[0011] In the mercerizing process described, the alkali concentration is 18 - 25 Baumé degrees.

[0012] There is also an ammonia liquor process between the mercerizing and water washing processes. The vehicle speed of the ammonia liquor process described is 35 - 55 m / min, and the water washing temperature is normal temperature.

[0013] The vehicle speed of the water washing process described is 40 - 50 m / min. Among them, the 1st and 10th water washing tanks do not heat up, and the 9th water washing tank is an acid tank and does not heat up.

[0014] In the water washing process described, the dosage of the anti-staining soap detergent Sinmorle RC-335 is 10 - 20 g / L.

[0015] The vehicle speed of the stentering process described is 50 - 60 m / min, and the drying oven temperature is 100 - 120 °C.

[0016] In the stentering process described, the fixing agent ALBAFIX ® The dosage of ECO is 10 - 20 g / L.

[0017] The blanket temperature of the pre-shrinking process described is 100 - 110 °C, the felt temperature is 110 - 120 °C, and the vehicle speed is 40 - 50 m / min.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1)The post-treatment process for improving the floating color fastness of yarn-dyed black cotton fabric according to the present invention can significantly improve the floating color problem of yarn-dyed black cotton fabric, and at the same time, it also helps to improve the wash color fastness of the finished product, thereby reducing the possible risks in the garment production process. This method not only has a simple process and convenient operation, but also can ensure that there is no color bleeding problem after garment washing and household washing, greatly improving the practicality and durability of the fabric;

[0020] (2)By adding the anti-staining soap detergent Sinmorle RC-335 during the water washing process, the present invention effectively prevents the phenomenon of floating color re-staining. At the same time, after the water washing tank is heated, the water washing effect is further enhanced, and the floating color is effectively washed away. In the two water washing tanks before the acid tank, by increasing the overflow water volume and strictly controlling the temperature of the water washing tank, the floating color is washed more thoroughly, thereby ensuring the water washing effect;

[0021] (3)By adding the fixing agent ALBAFIX ® ECO during the stentering process after the water washing process, the present invention improves the floating color problem on the fabric surface again and further improves the quality of the fabric. Specific embodiments

[0022] The present invention will be further described below in conjunction with embodiments, but it does not limit the implementation of the present invention.

[0023] The raw materials used in the examples and comparative examples are all conventional commercially available raw materials unless otherwise specified, and the process methods used in the examples and comparative examples are all conventional methods in the art unless otherwise specified.

[0024] Some of the raw materials used in the examples and comparative examples are described as follows:

[0025] The anti-staining soap detergent Sinmorle RC-335 is purchased from Shanghai Liming Auxiliary Co., Ltd.;

[0026] The anti-staining soap detergent ZS-CW is purchased from Beijing Kaike Rui Chemical New Materials Co., Ltd.;

[0027] The fixing agent ALBAFIX ® ECO is purchased from Huntsman Textile Effects (China) Co., Ltd.

[0028] The fixing agent FSN is purchased from Glebert (Tianjin) Chemical Co., Ltd.;

[0029] The fixing agent FA-R is purchased from Zibo Lurui Fine Chemical Co., Ltd.

[0030] Example 1

[0031] The specified black pure cotton fabric has a specification of BCICPT50×BCICPT50×144×75×57, a weave of 1 / 1, and a finishing method of ordinary finishing;

[0032] Its subsequent finishing and processing technology includes the following processes:

[0033] (1) Singeing: The vehicle speed is 105 m / min, the burner position is 1#, and the flame intensity is 14 mbar;

[0034] (2) Desizing: The steamer temperature is 98 °C, the water washing temperature is 95 °C, and the vehicle speed is 80 m / min;

[0035] (3) Mercerizing: The alkali concentration is 18 degrees Baumé;

[0036] (4) Water washing: The water washing equipment used includes a trough and 10 water washing tanks arranged in sequence. The vehicle speed is 50 m / min. Among them, the first and the tenth water washing tanks do not heat up. The ninth water washing tank is an acid tank and does not heat up. 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, and the overflow water volume is 2500 L / h. The water washing temperature of the seventh and eighth water washing tanks is 80 °C; 15 g / L of anti-staining soap detergent Sinmorle RC-335 needs to be added to the trough;

[0037] (5) Stentering: The vehicle speed is 50 m / min, the drying oven temperature is 100 °C, and 10 g / L of fixing agent ALBAFIX ® ECO;

[0038] (6) Pre-shrinking: The blanket temperature in the pre-shrinking process is 100 °C, the felt temperature is 110 °C, and the vehicle speed is 50 m / min.

[0039] Example 2

[0040] The specified black pure cotton fabric has a specification of CPT80 / 2×CPT80 / 2×134×96×58, a weave of high bull 8 / 6, and a finishing method of ordinary finishing;

[0041] Its subsequent finishing and processing technology includes the following processes:

[0042] (1) Singeing: The vehicle speed is 95 m / min, the burner position is 2#, and the flame intensity is 12 mbar;

[0043] (2) Desizing: The steamer temperature is 97 °C, the water washing temperature is 85 °C, and the vehicle speed is 85 m / min;

[0044] (3) Mercerizing: The alkali concentration is 25 degrees Baumé;

[0045] (4) Water washing: The water washing equipment used includes a trough and 10 water washing tanks arranged in sequence. The vehicle speed is 40 m / min. Among them, the 1st and 10th water washing tanks are not heated. The 9th water washing tank is an acid tank and is not heated. The water washing temperature of the 2nd - 6th water washing tanks is 80 °C. The 7th and 8th water washing tanks use overflow water, and the overflow water volume is 2300 L / h. The water washing temperature of the 7th and 8th water washing tanks is 85 °C; 20 g / L of anti-staining soap detergent Sinmorle RC-335 needs to be added to the trough;

[0046] (5) Stentering: The vehicle speed is 55 m / min, the drying oven temperature is 115 °C, and 15 g / L of fixing agent ALBAFIX ® ECO;

[0047] (6) Pre-shrinking: The temperature of the rubber blanket in the pre-shrinking process is 110 °C, the temperature of the woolen blanket is 120 °C, and the vehicle speed is 40 m / min.

[0048] Example 3

[0049] The specifications of the described black pure cotton fabric are CPT40×CPT40 / 2×100×50×57, the weave is 2 / 2CP, and the finishing method is liquid ammonia finishing;

[0050] Its post-finishing processing technology includes the following processes:

[0051] (1) Singeing: The vehicle speed is 100 m / min, the position of the burner is 3#, and the flame intensity is 14 mbar;

[0052] (2) Desizing: The temperature of the steaming box is 95 °C, the water washing temperature is 90 °C, and the vehicle speed is 85 m / min;

[0053] (3) Mercerizing: The alkali concentration is 21 Baumé;

[0054] (4) Liquid ammonia: The vehicle speed is 45 m / min, and the water washing temperature is at room temperature

[0055] (5) Water washing: The water washing equipment used includes a trough and 10 water washing tanks arranged in sequence. The vehicle speed is 45 m / min. Among them, the 1st and 10th water washing tanks are not heated. The 9th water washing tank is an acid tank and is not heated. The water washing temperature of the 2nd - 6th water washing tanks is 85 °C. The 7th and 8th water washing tanks use overflow water, and the overflow water volume is 3000 L / h. The water washing temperature of the 7th and 8th water washing tanks is 70 °C; 20 g / L of anti-staining soap detergent Sinmorle RC-335 needs to be added to the trough;

[0056] (6) Stentering: The vehicle speed is 50 m / min, the drying oven temperature is 120 °C, and 20 g / L of fixing agent ALBAFIX ® ECO;

[0057] (7) Pre-shrinking: The blanket temperature in the pre-shrinking process is 110 °C, the felt temperature is 120 °C, and the vehicle speed is 50 m / min.

[0058] Comparative Example 1

[0059] 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, and the others are the same as in Example 1.

[0060] Comparative Example 2

[0061] 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 1500 L / h, and the others are the same as in Example 3.

[0062] Comparative Example 3

[0063] The difference from Example 2 is that in the water washing process, the anti-staining soap detergent added to the trough is ZS-CW, and the others are the same as in Example 2.

[0064] Comparative Example 4

[0065] The difference from Example 2 is that in the stentering process, the fixing agent added is FSN, and the others are the same as in Example 2.

[0066] Comparative Example 5

[0067] The difference from Example 2 is that in the stentering process, the fixing agent added is FA-R, and the others are the same as in Example 2.

[0068] Perform performance tests on the fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 5 respectively, and the test methods are as follows:

[0069] 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.

[0070] Color fastness to washing: tested according to AATCC 61-2013 e2 (2020);

[0071] Color fastness: tested according to the Japanese Daimaru method;

[0072] The test results are shown in Table 1.

[0073] Table 1 Performance test results

[0074]

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In Comparative Examples 4 to 5, due to the replacement of the types of stentering fixing agents, the floating color remaining on the fabric during stentering processing could not be well fixed on the fabric but floated on the surface of the fabric and was likely to fall off when exposed to water, affecting the floating color fastness and color bleeding fastness.

Claims

1. A post-treatment processing technology for improving the floating color fastness of yarn-dyed black pure cotton fabric, characterized in that, It includes the following processes: singeing - desizing - mercerizing - washing - stentering - preshrinking; In the washing process, the washing equipment used includes a feed tank and 10 washing tanks arranged in sequence. The vehicle speed is 40 - 50 m / min. Among them, the 1st and 10th washing tanks are not heated. The 9th washing tank is an acid tank and is not heated. The 7th and 8th washing tanks use overflow water, and the overflow water volume is 2000 - 3000 L / h. The washing temperature is 70 - 85 °C; the washing temperature of the 2nd - 6th washing tanks is 80 - 90 °C; in the feed tank, anti - staining soap detergent Sinmorle RC - 335 needs to be added, and its dosage is 10 - 20 g / L; In the stentering process, the vehicle speed is 50 - 60 m / min, and the drying room temperature is 100 - 120 °C; it is necessary to add the fixing agent ALBAFIX ® ECO, and its dosage is 10 - 20 g / L; In the preshrinking process, the blanket temperature is 100 - 110 °C, the felt temperature is 110 - 120 °C, and the vehicle speed is 40 - 50 m / min.

2. The post-finishing processing technology for improving the floating color fastness of the yarn-dyed black cotton fabric according to claim 1, wherein The vehicle speed of the singeing process is 90 - 110 m / min, the burner position is 1 - 3#, and the flame intensity is 10 - 14 mbar.

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

4. The post-treatment process for improving the floating 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 - 25 Baumé degrees.

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

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