Effect of lycra and nylon yarn percentage on the dimensional and physical characteristics of locknit warp knitted fabrics

Abstract

The effects of different percentages of elastane and Nylon yarn on the dimensional and physical properties of elastanelNylon Locknit warp knitted fabrics are investigated. In order to investigate the properties ofthe fabric, four different samples were knitted by selecting four different run-in ratios of elastane and Nylon. Elastane yarn was kept at a constant elongation of 65% for all four samples. Two samples were produced keeping constant run-in of nylon yarn and changing the run-in length of elastane yarn. Then elastane yarn run-in was kept constant and produced two other samples. The sample with minimum run-in length of elastane yarn and the highest run-in ratio has the highest value of load at 20%, 40%, 60% and 80% extensions in length direction and the lowest values of load at 20%, 40%, 60% and 80% extensions in width direction. This is due to the fact that low run in of elastane yarn increases the strain on the yarn and it increases the tightness factor value of the sample and contributes higher load at extension along the length direction of the greige sample. Nylon yarn runner length influences the relaxation behavior of elastane yarn and it leads to reduce the load at extension along the width direction of the sample. Changing of Nylon yarn runner length influence the relaxation behavior of elastane yarn and it has an effect on the load at different extension in width direction and course density of the greige fabric. Results revealed that the effect of elastane content of the sample is more on the load at extension values than the effect of run-in of the Nylon yarn.