Investigation of the effect of different process variables on color and physical properties of viscose and cotton knitted fabrics

Abstract

The aim of this study was to investigate and compare the effect of process variables on the color and physical characteristics of viscose and cotton knitted fabrics. The effect of dye concentration, salt concentration, soda ash, dyeing time, dyeing temperature, material to liquor ratio, different dye class, fabric GSM, washing time, washing temperature, and enzyme concentration were investigated in terms of color strength (K/S value), color fastness, and pilling resistance. The K/S value of the colored fabric was calculated using UV visible spectrophotometer SF 650 TM and the pilling resistance of the enzyme-treated fabrics was tested by an ICI pilling tester. The results show that dye concentration has the greatest and key effect on the K/S value of viscose and cotton fabric. However, viscose fabric shows a higher K/S value than that of cotton fabric in similar dyeing conditions. Furthermore, the multi-functional dyes demonstrate the upmost K/S value than the vinyl sulphone dyes. Moreover, it was found that enzymatic treatment improved the pilling grade of cotton fabric, whereas no enzymatic effect on viscose fabric was observed.

Surface Modification of Viscose Fabric with Silane Coupling Agents ‐ An Aspect of Comfort Properties

“…Table 4 shows that as the exposure time to sunlight in open air increased, the colour changed from deep orange to fade orange for unmodified viscose and from bright orange to orange for silane‐modified viscose fibre dyed with two dyes (Direct orange 31 and reactive orange 14). The colour fastness of modified viscose fibres is superior to that of unmodified fibres because all of the modifiers (APS and MPS) form a protective layer on the fibre's surface [56–58] . This layer partially protects the fibres from UV‐ radiation and thus decreases the rate of UV‐light penetration into the fibre backbone.…”

“…The colour fastness of modified viscose fibres is superior to that of unmodified fibres because all of the modifiers (APS and MPS) form a protective layer on the fibre's surface. [56][57][58] This layer partially protects the fibres from UV-radiation and thus decreases the rate of UV-light penetration into the fibre backbone. This effect decreases the action of the UV -light on the change of colour fastness.…”

Study the Self-Cleaning Ability of Zno Contained Cotton Fabrics

“…A decrease in the K/S ratio indicates the disappearance of stains. Selfcleaning can be determined by comparing the K/S values of exposed and unexposed sections of the same stain, as shown below [19]:…”