Process for forming a continuous filament yarn from a melt spinn

Details Process for forming a continuous filament yarn from a melt spinn Process for forming a continuous filament yarn from a melt spinn

1982-09-17

1984-06-26

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264234, D01D 512

Patent

active

044565755

ABSTRACT:
A process for forming a continuous filament yarn from a melt-spinnable synthetic linear polymer and novel yarns of polyethylene terephthalate and yarns of polyhexamethylene adipamide produced by the process, the process comprising extruding the molten polymer through a shaped orifice to form a molten filamentary material, passing the molten filamentary material through a solidification zone, passing the solidified filamentary material through a conditioning zone provided with a gaseous atmosphere at a temperature above the glass transition temperature of the material and below its melting temperature, withdrawing the resulting filamentary yarn from the conditioning zone and winding up such yarn, characterized in that the gaseous atmosphere in the conditioning zone is compressed steam at an absolute pressure in excess of 5 psig and preferably, in the case of a yarn of polyethylene terephthalate, between 50 and 156 psig and preferably, in the case of a yarn of polyhexamethylene adipamide, between 14 and 70 psig.

REFERENCES:
patent: 2289860 (1942-07-01), Babcock

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