| 摘要 |
Composite filaments and yarns having excellent spinnability, dyeability and crimp developing properties, and exhibiting improved properties such as a small bulk density after development of crimps, a lower number of breakages in the monofilament or yarn during spinning, reduced deep dyeing defects, improved natural draw ratio, and development of fine, uniform helical crimps are obtained by melt-spinning component (A) a mixture, preferably having Mw/Mn of more than 2.5 selected from (i) mixtures obtained by continuously mixing an end product in the molten state obtained by a multi-step continuous polycondensation reaction with at least one intermediate product in the molten state occurring in this polycondensation reaction system, and (ii) mixtures obtained by continuously mixing at least two of said intermediate products, and component (B) at least one polymer having a viscosity different from that of component (A).
|
