Abstract
The object of this paper is to investigate the relationship of the values of the twist factor, density of weft yars (spun silk yarn) and rate of repeated elongation of fabrics to the compression properties of spun silk fabrics stretched repeatedly in th direction of weft yarns. The compression properties of textile fabrics were examined by means of rolling friction when a solid cylinder rolled on the fabric. It was shown that the compression modulus of spun silk fabrics stretched repeatedly varied with the increase in the rate of elongation. The peak observed in the lower range of values for the rate of repeated elongation (0.5-1%) was considered to be caused by the rearrangement of the fibers in the weft yarns. The compression modulus of spun silk fabrics stretched repeatedly decreased by more than 1% in the region repeatedly stretched, presumably due to the changes in the structure of yarn and fabric. It was also obsereved that the twist factor and density of weft yarn (spun silk yarn) affected considerably the compression properties of spun silk fabrics stretched repeatedly.
