Staining method for wet spinning of acrylic fibers

Abstract

The invention relates to a staining method for wig fiber manufacture, in particular to a stepwise staining method for wet spinning. A raw material of the spinning is mainly polyacrylonitrile. The staining method comprises the following steps of i, performing cation staining on the polyacrylonitrile through a temperature rising control method at the temperature ranging from 50 DEG C to 100 DEG C to obtain pre-stained polyacrylonitrile mixture; and ii, performing stock solution staining on the pre-stained polyacrylonitrile mixture, wherein pigment color paste accounts for 0.8-5% of the pre-stained polyacrylonitrile in weight. By means of the staining method, the dye and the pigment can be fully utilized, and ideal fibers which are bright in color, wide in color spectrum, easy to stain and not prone to fade can be prepared.

Description

[technical field] [0001] The invention relates to a dyeing method for manufacturing wig fibers, in particular to a step-by-step dyeing method for wet spinning. [Background technique] [0002] With the continuous development of society, wigs have gradually become people's pursuit of fashion trends and beauty. The modified polyacrylonitrile fiber used as a wig raw material has good elasticity and smoothness, and is often used as a wig raw material. [0003] At present, the dyeing methods for acrylic fibers are divided into stock solution coloring and gel coloring. Stock solution coloring refers to adding colorants before spinning during or after the polymerization process, and uniformly dispersing them in the color paste system to obtain colored fibers. The production method has the advantages of superior effect, simple process, low requirements for equipment, etc., but the pigment used in the colorant has the defects of not bright color and less chromatogram, while the dye u...

AI Technical Summary

Problems solved by technology

[0003] At present, the dyeing methods for acrylic fibers are divided into stock solution coloring and gel coloring. Stock solution coloring refers to adding colorants before spinning during or after the polymerization process, and uniformly dispersing them in the color paste system to obtain colored fibers. The production method has the advantages of superior effect, simple process, low requirements for equipment, etc., but the pigment used in the colorant has the defects of not bright color and less chromatogram, while the dye used is bright in color, but the combination with the polymer is not strong, resulting in dyeing The problem of low fastness

Gel coloring is a unique coloring method for acrylic fibers. However, this method is a wet tow dyeing method after spinning. The cost is high, the operation steps are many and complicated, and it is easy to produce industrial sewage. Dyeing with gel coloring method will cause dyeing. Uneven, easy to produce color flowers, the fiber prepared by this method has poor light and weather resistance

[0004] British Patent BP1,099,336 discloses that inorganic pigment, solvent DMF and dispersant, triethanolamine or p-phenylene diamine are mixed together, and ground in a ball mill to obtain the pigment of fine particles, after mixing with acrylonitrile polymer stock solution, spinning Silk obtains fiber, but the fiber color that this method prepares is bright-coloured not enough, can not use as wig silk coloring method; However, it has the disadvantages of large addition amount, low pigment concentration and poor compatibility with modified acrylic fiber, and NaSCN aqueous solution is used as solvent, so it can only be used in the wet spinning system of NaSCN method

Chinese patent CN1051118C discloses a dyeing method for nylon fibers. The method uses dyes to immerse nylon fibers in it and dyes them multiple times. However, this method has the disadvantages that the dyeing is not fast, the dyeing is not easy to be uniform, and the process is complicated.