What are disperse dyes? What solvents are used for disperse dyes? Disperse dyes have relatively small molecules and do not contain water-soluble groups in structure. They are uniformly dispersed in the dyeing liquor by means of dispersants for dyeing. It can dye polyester fiber, acetate fiber and polyamide fiber and become a special dye for polyester fiber.
Disperse dyes can be roughly divided into disperse orange, disperse blue, disperse yellow, and disperse red. Several different disperse dyes can be matched in a certain ratio to obtain disperse dyes such as disperse black, disperse green, and disperse violet.
In the process of commercial processing of disperse dyes, in order to make the commercial dyes quickly disperse in water into a uniform and stable colloidal suspension, the particle size of the dye must reach about 1 micron. In the sanding process, add dispersant and wetting agent to disperse The post-processing of dyes generally consists of sanding, seasoning, spray drying, and packaging. Many additives are used in the post-processing process, such as lignin, MF, anti-settling agent (SOS), anti-dust agent, dispersant NNO, and sodium sulfate to adjust the strength.
It does not contain strong water-soluble groups and is a class of non-ionic dyes that are dyed in a dispersed state during the dyeing process. The particle fineness is required to be about 1μm. After the original dye is prepared, it needs to undergo post-treatment processing, including crystal form stabilization, and commercial treatment such as grinding with dispersant to obtain the commercial dye. Mainly used for printing and dyeing polyester and its blended fabrics. It can also be used for the printing and dyeing of synthetic fibers such as acetate, nylon, polypropylene, chlorinated and acrylic.