Improving Dyeability of Polyester by Modifying Polymer and Fibre Structure

Production of polyester fiber is increasing throughout the world. When this fiber was introduced as a textile material, a lot of problems were faced during dyeing. This was due to the crystalline and hydrophobic nature of the fiber and there is no chemically active group in this fiber. Polyester fiber is mostly dyed with disperse dye using conventional methods of dyeing which faces a lot of problem. To solve this problem different methods of dyeing are given in this paper. The dyeability of the polyester fiber can be improved by modifying the polymer and fiber structure. Carrier free dyeable polyester can be prepared by incorporating additives such as polyethylene glycol, Azilic acid, Adipic acid, etc. and also by manipulating the spinning speed and drawing and heat setting parameters.