Revista de Ciência e Engenharia Têxtil

Effect of PVAmHCl Pre-treatment on the Properties of Modal Fabric Dyed with Reactive Dyes: An Approach for Salt Free Dyeing

Abstract

Periyasamy AP

In this research, polyvinylamine chloride (PVAmHCl) was used as a physical modification agent on regenerated cellulosic fabric such as modal by a pad-batch process. The modified modal samples were dyed with different reactive dyes containing various reactive groups. The dyeability of the modified modal samples with reactive dyes without electrolyte was significantly improved due to an increase in the ionic attraction between the reactive dyes and modified modal fabrics. It has been confirmed through zeta potential analysis, as well as the result of various fastness properties such as light, wash and rubbing fastness of polyvinylamine chloride pre-treated modal with different reactive dyes are similar to those of untreated modal fabric. Also, the tensile strength, flexural rigidity and crease recovery angle of pretreated sample were determined, out of that crease recovery angle and flexural rigidity of pretreated sample showing significant improvement.