MELT-EXTRUSION OF ECCENTRICALLY HOLLOWED FIBER

摘要

PURPOSE:A yarn which is melt-extruded through discontinuous round slits with a special dimension is asymmetrically cooled to produce eccentrically hollowed fibers with high latent crimpability through good and stabilized spinning operations. CONSTITUTION:When a polymer is melt-extruded into hollow fibers under cooling with the air flowing horizontally from one direction, a spinneret in which each spinning hole is composed of discontinuous slits cut on a circumference 2 (2a, 2b) and the ratio of the slit width Wa on the side facing to the cooling air to that Wb on the opposite side is set to 1:(1.2-2.0) (Wa/Wb) is used.