Acid dye refers to the dye molecules containing acid groups, also known as anionic dyes, and protein fiber molecules in the amino group to ionic bond, in acid, weak acid or neutral conditions. Mainly azo and anthraquinone structure, a few aromatic methane structure. Dye and color are generally their......
Read MoreBecause polyester fiber has the characteristics of strong hydrophobicity, high crystallinity and high alignment, it is difficult to make the dye enter the fiber in the form of single molecule to complete the dyeing of polyester by conventional methods. Therefore, special dyeing methods are required.......
Read More1. Direct dyes Structural properties: Direct dyes are a class of water-soluble anionic dyes. Most of the dye molecules contain sulfonic acid groups, and some have carboxyl groups. The dye molecules and cellulose molecules are combined by van der Waals forces and hydrogen bonds.
Read MoreBecause polyester fiber has the characteristics of strong hydrophobicity, high crystallinity and alignment, small fiber micro-gap and not easy to wet and bulk, it is difficult to make the dye enter the fiber in the form of single molecule to complete the dyeing of polyester, according to the convent......
Read More