Patent ID: 6824717
Filing Date: 2004-11-30
Classification: D01D

Abstract:
A method of melt spinning a group of multifilament yarns from a heated polymer melt comprising the steps ofextruding the melt through a plurality of nozzles arranged in a linear arrangement so as to define a plurality of linearly arranged downwardly advancing groups of filaments, and withdrawing the groups of filaments from the nozzles so that the groups of filaments advance a) through a precooling zone wherein the filaments are cooled without significant solidification, and then b) through an aftercooling zone wherein the filaments are further cooled by the action of a coolant flow which is directed into the path of the groups in such a manner that the filaments solidify in a solidification range within the aftercooling zone, with the coolant flow having a predetermined flow velocity for influencing the tension imparted to the filaments.