抄録
Previously established theory on the steady-state multi-filament spinning was applied to the actual melt-spinning process of poly (ethylene terephthalate) using a simulation system. The birefringence of spun filament was corelated with the calculated value, δ95, which was obtained at the point where the ratio of yarn velocity to the take-up speed was 0.95. In order to increase the stability of spinning, the effect of variation of the stress calculated just below the orifice, and diameter of nozzle was examined. The eveness of denier in the fiber direction was found to be evaluated by the (dV/dx)max and Xm, which could be obtained at the maximum point of the summarized curve of (dV/dx), where V was the spinning velocity and x was the distance from the nozzle. The obtained results suggest that the theory was effectively applicable to the real melt spinning of multi-filament.
