CELLULOSE ACETATE FIBER AND METHOD FOR PRODUCING THE SAME, AND WOVEN OR KNITTED FABRIC

摘要

PROBLEM TO BE SOLVED: To provide a cellulose acetate fiber that exhibits an excellent feeling and excellent color development properties, and to obtain the fiber with good fiber producing properties.SOLUTION: The cellulose acetate fiber has a composite structure in which cellulose triacetate 2 is arranged between cellulose diacetate 1 and cellulose diacetate 1. In the whole fiber, the amount of the cellulose diacetate 1 and the amount of the cellulose triacetate 2 is 20/80 to 80/20 in a mass ratio. Ridges extending along an outer circumference in a direction perpendicular to the fiber axis and having a thickness of 0.1-1 μm are formed on the whole surface of the fiber. The cellulose acetate fiber is produced by performing dry conjugate spinning under a condition of a specific spinning draft and a discharging linear velocity.