Anti-staining dyeing process for nylon-cotton blended fabric

Abstract

The invention discloses an anti-staining dyeing process for a nylon-cotton blended fabric. The process comprises: adding a nylon-cotton blended fabric, a dye and an auxiliary agent to water, controlling a temperature at 20-30 DEG C, adding anhydrous sodium sulfate under a stirring condition, uniformly heating to achieve a temperature of 80-90 DEG C, carrying out thermal insulation for 0.5-1 h, adding an alkali to adjust the pH value to 9-11, continuously carrying out thermal insulation for 0.5-1 h, cooling to achieve a room temperature, removing the residue liquid, sequentially carrying out water washing, soaping and water washing, adopting glacial acetic acid to adjust the pH value to 5.0, and carrying out water washing and drying to obtain the dyed finished product, wherein the auxiliary agent is an anionic surfactant. According to the present invention, the used auxiliary agent anionic surfactant can be combined with NH<3+> on the nylon fibers in a salt type bond form, such that the reaction between the amino group on the nylon fibers and the active group of the active dye can be reduced, the combination of the nylon and the dye during the cotton dyeing process can be prevented, and the nylon staining grade is improved.

Description

technical field [0001] The invention belongs to the field of dye compositions, and in particular relates to an anti-staining dyeing process for nylon-cotton blended fabrics. Background technique [0002] Cotton nylon fabric is currently a popular clothing fabric. Among them, cotton fiber feels soft, has good air permeability and moisture absorption, and is comfortable to wear, but it is easy to wrinkle; nylon fiber has high resilience and fatigue resistance, and has good moisture absorption performance. After interweaving cotton and nylon, the fabric can not only have the advantages of nylon and cotton fibers, but also overcome their respective shortcomings, showing a strong body and smooth feel. When dyeing cotton nylon fabric, due to the difference in chemical structure of nylon fiber and cotton fiber, its dyeing process has particularity. [0003] Reactive dyes are one of the main dyes for cotton fiber dyeing. Since the appearance of commercial products in 1956, the vari...

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Problems solved by technology

[0006] (1) The color of the two phases of cotton and nylon is reversed, the cotton is light and the brocade is deep, and the two phases cannot be leveled, such as reactive brilliant blue is the representative; (2) The two phases of cotton and nylon, the color changes, such as Kehuasu ED-NN, etc. Dyeing cotton is black, and dyed brocade is orange; (3) Can’t imitate the same effect, such as brocade stays white but not white, cotton brocade flashes different colors but the color is turbid, dyed cotton brocade is uniform in color but the two phases are uneven , especially light colors; (4) In the process of dyeing brocade first and then covering cotton, the shade of nylon is difficult to control due to the active covering of cotton; (5) due to different dyeing methods (jig dyeing, jet liquid flow Dyeing, small sample dyeing machine dyeing), the degree of staining of reactive dyes is obviously different, which often makes it difficult to imitate small samples from large samples

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