| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester modified cross-section fiber for weaving and knitting, suitable for producing woven or knitted fabrics of high class giving a spun silk-like fabric hand having a fluffy feeling and excellent in sewability having the effect of preventing the yarn tightening caused by vertical movement of machine-sewing needles during the high-speed sewing operation. SOLUTION: This modified cross section fiber is a polyester drawn fiber having an elongation stiffness of 800-1,000kg/mm<2> and has ridges 2 and grooves 3 alternately and uniformly on the fiber surface in the length. The cross sections of individual ridge 2 and groove 3 are rectangular and almost trapezoidal and they continue in the fiber axis direction and the number and the size of the ridge satisfy the formulas, 15<=N<=35, 0.3<=W<=1 and 1.5<=H<=3W (where N is the number of the ridge, W is width of the ridge inμm and H is height of the ridge inμm). |
