Cationic dyes are special dye for polyacrylonitrile fiber dyeing, and it can also be used for modified polyester (CDP) dyeing. Today, I will share the basic knowledge of cationic dyes.
Cationic dyes are one of the earliest synthetic dyes. In 1856, aniline violet synthesized by W.H. Perkin in the United States and crystal violet and malachite green crystal subsequently appeared, both of which were cationic dyes. These dyes, formerly known as basic dyes, can dye protein fibers and cellulose fibers treated with tannic acid and tartar. They have brilliant color but are not resistant to sunlight. They are replaced by direct dyes, vat dyes and acid dyes developed later.
After the industrial production of polyacrylonitrile fiber in 1950s, it was found that the cationic dyes not only had high directness and rich color, but also had much higher color fastness than protein fiber and cellulose fiber, which aroused people’s interest again.
In order to further adapt to the application of Polyacrylonitrile and some other synthetic fibers, many new varieties with high fastness were synthesized, such as poly (methylchuan), poly (methylchuan) and forced naphthalene lactam structures, so that the cationic dyes become a kind of main dyes for polyacrylonitrile fiber dyeing.
The cationic dye generates colored ions with positive charge in the solution, and forms salts with acid anion such as chloride ion, acetate, phosphate, methyl sulfate, etc., so as to dye polyacrylonitrile fiber. In actual dyeing, several cationic dyes are often used to form a specific color. However, the mixed dyeing of cationic dyes is not easy to achieve the same color light, resulting in spots and layers.
Therefore, in the production of cationic dyes, we should not only expand the variety and quantity, but also pay attention to the matching of dye varieties; in addition, we should also pay attention to improving the steaming fastness and light fastness of cationic dyes.
Cangzhou Xincheng Weiye Chemical is specialized in manufacturing various kinds of cationic dyes like cationic turquoise blue X-GB, cationic yellow X-GL, cationic red X-GRL, cationic black X-O and so on. As the professional manufacturer, we not only provide reliable quality cationic dyes but also give more suggestions for your acrylic fiber dyeing.
Contact person: Miss Jessie Geng
Post time: Nov-25-2019