| 摘要 |
The present invention is to provide a polytrimethylene terephthalate fiber having a trilobal type modified cross-section, composed of 95 mol% or more of trimethylene terephthalate repeating units and 5 mol% or less of other ester repeating units to have an intrinsic viscosity in a range from 0.7 to 1.3 (dl/g), wherein the outer periphery of the trilobal type cross-section consists of outwardly convex sections or of outwardly convex section and straight sections. According to the inventive method, it is possible to produce the above-mentioned fiber of the modified cross-section in an industrially stable manner while minimizing the adhesion of polymer scum to the spinning orifice or the contamination thereof to suppress the generation of fluff or yarn breakage. <IMAGE> |
