Process for forming high strength, high modulus polymer fibers
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United States of America Patent
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-
Feb 15, 1994
Issued Date -
N/A
app pub date -
Dec 31, 1987
filing date -
Feb 6, 1986
priority date (Note) -
In Force
status (Latency Note)
Importance
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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