Effect of the morphology of polyesters filaments on their physical properties and dyeing performances

Abstract

Nowadays, polyester fibers/filaments are undergoing innovations to keep their first place in the textile markets. This paper is devoted to study the physical and chemical properties of polyesters filaments with different geometries and their influence on dyeing performances. Four kinds of filaments were studied and compared: PET monofilaments with two different geometries, (A) circular and (B) cross-sectional shapes, (C) PTT monofilaments with tetra-channel shapes, and (D) bicomponent PET/PTT filaments. Different tools have been used to characterize studied filaments by determination their morphological behaviors, structures as well as their thermal and mechanical properties. Dyeing process of these polyester filaments was also investigated using a C.I Disperse Yellow 211 dye. The effects of dyeing parameters (temperature, time and carrier concentration) on dyeing performances (color strength and CIELab coordinates) were then studied and optimized used Box–Behnken experimental design. The comparing results showed that the filaments (D) give an excellent dyestuff affinity. Finally, samples dyed under optimum conditions showed that those knitted using filaments (D) present the highest strength color (25.3), followed by filaments (B) (21.4), filaments (C) (19.9) and filaments (A) (19.4).