| 摘要 |
A process for producing side-by-side type composite fibers made of polypropylene-polyethylene which do not have hardly any crimp nor latent crimpability is provided. In said process, a composite spinning is carried out by melt-extrusion by using, as composite components of side by side type, crystalline polypropylene of an intrinsic viscosity (I.V.) of 1.45 DIFFERENCE 2.15 and high density polyethylene of I.V. of 0.85 DIFFERENCE 1.05 under a condition satisfying the relationship of 10,500>/=DX V>/=5,139 (V: take-up speed (m/min); D: denier of taken up unstretched fibers); and stretching the resulting filaments to 3 DIFFERENCE 5 times the original length at a temperature of 90 DEG C. or higher. |
