| 摘要 |
The present invention provides a polyester-based conjugate fiber pirn that is formed by winding, in a pirn shape, a conjugate fiber wherein the fiber is formed from a single filament prepared by combining two types of polyester components in a side-by-side manner or in an eccentric sheath-core manner, and at least one polyester component forming the single filament is a poly(trimethylene terephthalate) containing 90% by mole or more of trimethylene terephthalate repeating units, the winding amount of the conjugate fiber pirn being 1 kg or more, the winding angle in a taper portion thereof being from 15 to 21 DEG , the winding hardness in the cylinder portion thereof being from 75 to 92, and the starting temperature of thermal shrinkage stress manifestation of the conjugate fiber being from 50 to 80 DEG C. <IMAGE> |
