Abstract
PET/PTT bicomponent filaments yarn is produced by two polymers: the polyethylene terephthalate (PET) and the polytrimethylene terephtalate (PTT) extruded side by side. This yarn is known for its high mechanical properties in particular elasticity and elastic recovery. However, differences between physical and chemical properties of the two components make the dyeing step of this yarn complicated. The aim of this work is the development of a dyeing process for bicomponent filaments without altering their physical and chemical properties. Different techniques such as SEM, FTIR, and differential scanning calorimetry (DSC) were used to characterize the studied yarn. For dyeing, three different disperse dyes CI Disperse Red 167.1, CI Disperse Yellow 211, and CI Disperse Red 60 with different energy classes were studied. The influence of dyeing conditions in particular dyeing temperature, pH of dye bath, dyeing time, and carrier concentration in the dye bath was evaluated. Responses analyzed are color strength (K/S), colorimetric coordinates and color fastness of samples dyed with studied dyes. In addition, the stability of elasticity and elastic recovery of bicomponent filament fabrics after the dyeing process has been also verified and proved.
Highlights
Nowadays, the textile industry is looking for new alternatives and tends to use more efficient, innovative, and ecological methods while guaranteeing quality and competitiveness
This paper studied the dyeing process of polyethylene terephthalate (PET)/polytrimethylene terephtalate (PTT) bicomponent filaments using three disperse dyes
The characterization of filaments from point of view morphology, chemical, thermal, and physical properties was carried out using different techniques such as scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC)
Summary
The textile industry is looking for new alternatives and tends to use more efficient, innovative, and ecological methods while guaranteeing quality and competitiveness. The focus of many recent research has been on improving the performances of textiles in terms of durability [1], resistance [2], permeability [3], elastic recovery [4,5,6], biodegradability [7], etc In this context, conventional fibers can no longer meet the demands of textile market which continues to grow and change. Conventional fibers can no longer meet the demands of textile market which continues to grow and change To meet these industrial needs, recently, several studies have succeeded to combine several polymers in a single filament in order to obtain the so-called bicomponent, tricomponent, and even more fibers or filaments. They differ from each other in terms of physical and chemical properties such as Processes 2020, 8, 501; doi:10.3390/pr8050501 www.mdpi.com/journal/processes
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