Commercially polyester/cotton blended fabrics are dyed by two-bath or one-bath-two step dyeing method employing suitable dyes and chemicals for each fiber. The two bath dyeing methods are relatively long and complicated and the one bath-two step dyeing procedure is shorter as compared to two bath method but the dyeability is poor. To address this issue, the present investigation focused to formulate a new method in which the polyester/cotton blends can be dyed at lower temperature with an improved dye uptake and fastness properties using disperse and reactive dyes. Polyester/cotton blended fabric and yarns were subjected to pre-treatment using two different azeotropic solvent mixtures and then dyed using disperse and reactive dyes. The dyeability of the pre-treated samples was found to increase tremendously while the fastness properties get slightly improved.
B. Muralidharan, S. Laya and S. Vigneswari, 2011. An Investigation on the Effect of Azeotropic Solvent Mixture Pretreatment of 67:33 PET/CO Blended Fabric and Yarn- Part II. Asian Journal of Textile, 1: 145-160.