METHOD FOR PRODUCING SUPER FINE POLYAMIDE MULTIFILAMENT AND APPARATUS FOR MELT-SPINNING POLYAMIDE MULTIFILAMENT YARN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a super fine polyamide multifilament, by which the super fine polyamide multifilament having a good dyeing quality can be produced in good productivity under excellent fiber-producing operability, and to provide an apparatus therefor.;SOLUTION: This method for producing a polyamide multifilament yarn having a single filament fineness of ≤0.8 dtex and comprising ≥50 filaments is characterized by melt-extruding a polyamide from a spinneret in which extrusion holes are circumferentially arranged, blowing a cooling gas on the spun filaments from the whole circumferential directions from a cylindrical cooling device disposed to surround the filaments to cool the filaments, oiling the filaments, further interlacing the filaments, and then winding up the filaments on a take-up device through at least a pair of goddet rollers at a large winding rate of 3,500 to 5,000 m/min. And the apparatus for melt-spinning the polyamide multifilament yarn.;COPYRIGHT: (C)2007,JPO&INPIT