| abstract |
(57) [Summary] (Modified) [Problem] Composite fiber with less elastic crimp development due to mechanical stress, high latent crimp development power during heat treatment, and less load dependency when latent crimp development occurs Manufacturing method. SOLUTION: The degree of crimp is 8 to 30%, and the number of crimps is 10 to 3. With 0/25 mm crimp and 0.5 mg / d load, A three-dimensional crimp developed by heat treatment at 160 ° C. for 60 seconds has a crimp degree of 15 to 35% and a crimp number of 20 to 40/25 mm, and a neopentyl glycol ethylene oxide adduct is glyco-formed. A side-by-side type or eccentric sheath core is obtained by melt-extruding a copolymerized polyester copolymerized with 1 to 30 mol% as a high-shrink component as a high-shrink component and a polyester composed of ethylene terephthalate repeating units as a low-shrink component. Composite spinning in a mold, heat treatment for a fixed length at a drawing temperature of 170 to 180 ° C., press type, crimp imparting device with a number of crimps of 10 to 30/25 mm, and a crimping degree of 8 -30% crimp was applied. |