Relationship Between the Knitting Defects and Knots of Cotton Knitting Yarns

Abstract

This article aims to investigate experimentally the effect of knot's type and the length of knot's end on the occurring probability of knitting defects, ie., knitting holes and to discuss the breaking point of yarn on knitting holes. Experiments were made by knitting 1x1 rib with a circular knitting machine using 40s cotton yarn. The following results are obtained:1) Comparing with the single weaver's knots, round knots cause much more knitting holes and machine stoppings. 2) On knitting, the yarn having knots breaks at the knitting side of knots. 3) On the single weaver's knot, the occurring probability of knitting holes increases with increasing a length of knot's end and decreasing a stitch density of knitted fabric.4) On both knots, the occurring probability of knitting holes increases with increaing the rpm of the machine up to about 17 rpm, but decreases at 18 rpm.5) On both knots, the stopping probability of the machine is proportional to the occurring probability of knitting holes.