Process for forming high strength, high modulus polymer fibers

Details Process for forming high strength, high modulus polymer fibers Process for forming high strength, high modulus polymer fibers

1987-12-31

1994-02-15

Miller, Edward A.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264178F, 264203, 2642108, D01F 600

Patent

active

052864359

ABSTRACT:
Fibers of linear polyethylene or polypropylene are solution spun, cooled, dried in hot air and hot drawn. Drying and hot drawing are carried out by passing a moving filament of the wet polymer through a hot air dryer having an air temperature of at least 55.degree. C., preferably at least 60.degree. C., then heating and hot drawing a moving filament of the dried fiber. Optional steps include wet drawing the fiber prior to drying, and solvent exchange of the original solvent, e.g. decalin, for a more volatile solvent.

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