| 摘要 |
PURPOSE:To control the amorphous orientation of a polyester fiber package, by setting a yarn length of 3-40m per unit length of 1m in the axial direction of a bobbin, and setting a taper angle of 25 deg. or less at the end face of the package. CONSTITUTION:In a polyester fiber package, the yield stress is 1.7-2.8g/d, the range DELTAT of the fluctuation in the stretch tension measured in the axial direction of the fiber at 4% of stretch is 0.13g/d or less, the yarn length per unit length of 1m in the axial direction of a bobbin is 3-40m, and the taper angle at the end face of the package is 25 deg. or less. For that reason, the amorphous orientation of the package is controlled to be appropriate. |
