Dyeing of 100% Knitted Polyester with Disperse Dyes Using Natural Acid-Buffer and Compared with Conventional Dyeing Method

Abstract

Disperse dye is famous & most common element to dyeing polyester fabric in the textile world. It is the only dye which can capable to dyeing polyester fabric. In this studies, focused on maintaining same pH value of dye bath 4.0-4.2, which is extremely required for polyester dyeing with disperse dye. Here also maintain same dye concentration, dyeing temperature and cooling method just bring change in chemical. For dyeing the polyester fabric with disperse dyes, need to use acetic acid for the maintain pH of dye bath and dispersing agent/levelling to proper dispersion of dye. In this experiment, trying to used citric acid which extracted from lemon and sodium citrate make from citric acid & baking soda. Here acid-buffer act as both dispersing agent & acetic acid & helps to dye adsorption on the fabric. After completing dyeing, observe wash fastness and rubbing fastness difference, color strength difference in spectrophotometer and shade difference after changing chemical & check the all quality parameter of both dyed sample and compare them. The result is natural acid-buffer dyed sample slightly lighter in shade but the other quality parameters are satisfactory.