Abstract
A new cellulose triacetate staple fiber, Arnel 60, is undergoing development. This fiber has tensile strength in excess of 2 g./den. and elongation of about 25% which imparts higher strength to spun yarns and permits the spinning and use of much finer counts, since fiber deniers as low as 1.5 can be utilized. The wet and hot wet mechanical properties of Arnel 60 are also improved over Arnel staple, suggesting improved wash ability and ease-of-care performance. The improvement in mechanical properties is ascribed to increased orientation and a narrower molecular tautness distribution. Un like Arnel, the fiber has a rough textured surface which provides a natural semidull luster and gives, in conjunction with natural crimp, sufficient cohesiveness for fiber processing. Arnel 60 is similar to Arnel in heat settability, ironing and glazing per formance, dimensional stability, dyeing behavior, and dyefastness.