MANUFACTURING METHOD OF POLYESTER ULTRA-FINE FILAMENT DRAWN YARN HAVING EXCELLENT UNIFORMITY AND SPINNING WORK ABILITY AND CONTRIVANCE FOR PREPARING THEREOF

摘要

The present invention method for producing stretched microfine filaments with very fine filament filament for manufacturing a cooling device for the purpose of improving uniformity and spinning workability of the polymer to be discharged from the nozzle and it's and relates to that, cooling of the polymer discharged from the spinneret , through the fuel supply, the stretching and heat treatment after the step in manufacturing an extra fine filament filament, intrinsic viscosity of 0.640 to 0.670 using a polyester polymer of 50 to 500, the number of individuals within the room threaded hole nozzle spinneret (1), room the discharge rate of forty per 0.10~2.0g / min. So that the hole and the temperature of the spinning atmosphere to 300 ℃ ~380 ℃ then allowed to cool air (3) to the cooling device is a cooling air discharge portion 14 of the present invention, the inlet, the cooling filter composed of sintered body of metal particles, at the same time to even out the velocity distribution of the cooling air (3) to adjust the metal particle size of 13, a fixed rod 4 is adjusting the length protruding above the top cap 12 to be discharged from the spinning nozzle (1) It was uniformly quenched by applying a cooling device according to the invention is cooled under the condition of high temperature uniformity of the molten polymer, and then the fuel supply to the quenched polymer in the spinning nozzle (1) directly under 700~1600mm position, the first roller (7 ) and the secondary rollers (8) and the third roller; 9 is stretched, and by heat treatment in a known way between the quenching in a condition uniformity of the molten polymer in the high temperature and, with a minimum of four flow caused by external interference airflow uniformity and spinning workability is excellent polyester microfine filaments filament It can be obtained.