What dyes are used for dyeing polyester fabrics? Disperse dyes for dyeing polyester fabrics, polyester is also called polyester, full name polyethylene terephthalate, is a kind of organic synthetic fiber without hydrophilicity. Therefore, traditional direct, acidic, reactive and other water-soluble dyes cannot be adsorbed onto this hydrophobic fiber and cannot be dyed. The reduction and sulfur dyes have large molecules and larger associated particles, so they cannot penetrate into the polyester macromolecules with high crystallinity and dense structure.

 

The disperse dye is a kind of small molecule pigment without water-soluble groups. It has a good affinity with hydrophobic polyester and has a small molecule. It can take the opportunity to "drill" when the polyester fiber expands under the influence of high temperature. The gaps of polyester fibers are such that, therefore, polyester can only be dyed with this dye.