STUDY ON STRENGTH AND BREAKING ELONGATION FOR YARNS AND KNITTED FABRICS USED TO MAKE SOCKS

摘要

Resistance to different applications is a main center for assessing the quality of yarn used in knitting socks. During processing, textile yarn is subjected to mechanical stress of different nature and different intensity. The most common types of requests are traction, which usually does not exceed 25 to 30% of breaking strength. To these forces the twisting, bending, compression, friction or shear forces are added. The resistance of threads in these applications is determined by the nature of raw material, the fineness of the yarn, spinning system . A first parameter for assessing the quality of yarns and knitted fabrics made from them is the tensile strength and elongation at break by default. In the present work the tests were made on cotton yarns, straight or twisted, with different fineness. Also has been tested the tensile strength and breaking elongation for a few structures of knitted fabrics. In the process of achieving knitted products, strength and breaking elongation are decisive factors who affecting the parameters of winding, warping, knitting, finishing.