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Soaping method of fiber dyed with reactive dyes

A reactive dye and soaping technology, which is applied in the field of fiber dyeing, can solve problems such as increased process cost, reduced fiber color fastness, and high energy consumption, and achieves the effects of saving process cost, reducing the number of washing times, and reducing overall energy consumption

Active Publication Date: 2021-10-01
GUANGDONG ESQUEL TEXTILES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the improvement of the soaping process is mostly concentrated on low-temperature soaping (the temperature is usually not higher than 100 ° C). In the fiber dyeing industry, it is generally believed that: (1) high temperature will reduce the color fastness of the fiber; (2) high temperature will reduce the color fastness of the fiber; Will bring high energy consumption, leading to an increase in process costs

Method used

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  • Soaping method of fiber dyed with reactive dyes
  • Soaping method of fiber dyed with reactive dyes
  • Soaping method of fiber dyed with reactive dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Select the CF40 / 1 pure cotton yarn of the same yarn batch, arrange the following dye formula (Table 1) to carry out conventional pretreatment and dyeing, after the dyeing is finished, it is out of the vat, split into two vats on average, and use the post-treatment process of Comparative Example 1 and the vat respectively. The post-treatment process of Example 1 of the present invention was tested and compared.

[0034] Table 1

[0035] dye combination Dye dosage OWF reactive red 1 2.10％ Active Yellow 1 1.51％ Reactive Blue 1 3.25％

[0036] The post-processing flow is as follows:

[0037] (1) Post-treatment process of Comparative Example 1: washing with water (50°C×5min)→acid washing (50°C×5min)→soaping (98°C×10min+soaping agent)→soaping (98°C×10min+soaping agent )→soaping (98℃×10min+soaping agent)→water washing (80℃×5min)→water washing (80℃×5min)→water washing (80℃×5min)→water washing (60℃×5min);

[0038] (2) Post-treatment process of...

Embodiment 2

[0048] Select the CF40 / 1 pure cotton yarn of the same yarn batch, arrange the following dye formula (Table 3) to carry out conventional pretreatment and dyeing, after the dyeing is finished, it is out of the vat, split into two vats on average, and use the post-treatment process of Comparative Example 2 and the vat respectively. The post-treatment process of Example 2 of the present invention was tested and compared.

[0049] table 3

[0050] dye combination Dye dosage OWF Reactive Red 2 1.10％ Active Yellow 2 1.51％ Reactive Blue 2 4.25％

[0051] The post-processing flow is as follows:

[0052] (1) Post-treatment process of comparative example 2: washing with water (50°C×5min)→acid washing (50°C×5min)→soaping (98°C×10min+soaping agent)→soaping (98°C×10min+soaping agent )→soaping (98℃×10min+soaping agent)→water washing (80℃×5min)→water washing (80℃×5min)→water washing (80℃×5min)→water washing (60℃×5min);

[0053] (2) Post-treatment process of...

Embodiment 3

[0061]According to the same post-treatment process of embodiment 1, the reactive dye hydrolyzed dye wash-out effect and the impact of high soaping temperature on color fastness are studied under different soaping temperatures, different soaping times or different soaping agent conditions, the results are as follows Figure 1-3 and shown in Table 5.

[0062] table 5

[0063]

[0064] Depend on figure 1 It can be seen that as the soaping temperature increases, the wash-off rate gradually increases, and when the temperature rises above 110°C, the rate of increase increases greatly, and the wash-off rate between 110°C and 130°C is 34.3% to 43.6%. Compared with soaping at 100°C, the floating color removal rate is increased by 10-40%, and the floating color removal rate is significantly improved.

[0065] Depend on figure 2 It can be seen that with the increase of soaping time, there is little difference in the wash-off rate, which can be reasonably controlled to 5min-20min i...

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Abstract

The invention relates to a soaping method for fibers dyed with reactive dyes, which comprises the following steps: (1) obtaining fibers dyed with reactive dyes; (2) adding water and soaping agent to the fibers, and then raising the temperature to above 110° C. Soaping; that's it. The soaping method can effectively remove the floating color in the fiber dyed with reactive dyes, reduce the number of washings in the post-treatment of the fiber and improve the color fastness of the fiber, shorten the post-treatment process, reduce water consumption and energy consumption, and overall Reduce post-processing costs.

Description

technical field [0001] The invention relates to the technical field of fiber dyeing, in particular to a soaping method for dyed fiber with reactive dyes. Background technique [0002] Reactive dyes have simple molecular structure, complete color, relatively complete chromatogram, convenient use, and low cost. In addition, they contain sulfonic acid water-soluble groups, which can be ionized into dye anions in water, and have high stability to hard water, diffusibility and uniformity. It has good dyeability and is the most widely used dye type at present. [0003] However, reactive dyes have the disadvantage of low color fixation rate, and the hydrolyzed products obtained by the hydrolysis reaction with water generally cannot react with the fibers, so the dye utilization rate is very low, and the hydrolyzed dyes on the raffinate and fibers can be as high as 30% to 45%. %, at the same time, due to the affinity of hydrolyzed dyes to cellulose fibers, it affects its washability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/04D06P5/08D06P1/38D06P3/66
Inventor 许满吴海彬胡广文何韵湘安志轩
Owner GUANGDONG ESQUEL TEXTILES CO LTD
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