An Investigation of the Behavior of Thin Places in Ring Spun Yarns

Sujit Kumar Sinha, Pawan Kumar


A thin place in a spun yarn with less number of fibers contains more twist and should result in higher cohesion between the fibers. Still a yarn generally fails at thin place. To study the behavior of thin places during tensile testing, ring spun yarn with three different composition and two counts were produced at three different twist levels. The effect of mass variation on twist and tensile behavior was studied. Yarn thin places in which the mass was 30%, 40%, and 50% less than the mean mass of the yarn were taken for the study. There has been a significant change in the overall and local twist with variation of mass. The composition of the yarns and change in their diameter were found to influence the tensile behavior of the yarns.

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