Study of Changes in Tensile Cyclic Characteristics of Cotton /Acrylic Blended Yarn after Knitting Process

Abstract

Influence of the knitting process and density on the tensile characteristics of cotton/ acrylic blended yarns were studied. In the paper 1st cycle tensile characteristics of initial blended yarns and yarns obtained after deknitting knitted fabrics were compared. It was stated that after knitting all 1st cycle tensile characteristics as specific stress, plastic strain, degree of elasticity and hysteresis, have changed. After knitting process all examined yarns had lost their elasticity and the values of their plastic strain increased. After knitting the values of hysteresis of tested cotton/acrylic blended yarns sufficiently increase too. All tested indices of the yarns depend on the value of total strain. Knitting density especially influences upon the 1st cycle tensile characteristic, as specific stress, but don’t influence upon the plastic strain, elasticity and hysteresis of tested blended yarns.