Longitudinal Swelling in Water of Heat-Treated Nylon 66 Yarns and Fabrics

Abstract

Longitudinal swelling in water of nylon 66 multifilament yarn and fabric has been measured before and after heat setting. It is shown that relatively large increases in longitudinal swelling of the nylon occur as a result of setting. The swelling produced is to a large extent of reversible nature, which results in considerable stresses being produced in heat-set specimens dried at constant extension.