What is disperse dyes and its application?
Disperse dyes are a type of dyes with relatively small molecules and no water-soluble groups in the structure. It must use a dispersing agent to evenly disperse the dye in the dye solution during dyeing to dye polyester and other fibers.
Disperse dyes have small molecules and do not contain water-soluble groups in their structure. They are uniformly dispersed in the dye 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 proportion 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 quickly disperse commercial dyes into a uniform and stable colloidal suspension in water, the fineness of the dye particles must reach about 1 micron. Add dispersant and wetting agent during the sanding process 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.
Disperse dyes are the most important and main category in the dye industry. They do not contain strong water-soluble groups and are a type 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 prepare 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 fiber, and acrylic fiber.