Process for treating anisotropic melt-forming polymeric products

Details Process for treating anisotropic melt-forming polymeric products Process for treating anisotropic melt-forming polymeric products

1977-12-06

1980-01-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

By a temperature change

264176F, 264176R, 264342RE, 264347, 528191, 528309, B29C 2500

Patent

active

041838955

ABSTRACT:
Fibers with enhanced tenacity are prepared by heat treating oriented fibers from anisotropic-melt-forming linear aromatic and cycloaliphatic polymers, especially polyesters (including copolyesters), while said fibers are essentially relaxed, at temperatures near the flow temperature but sufficiently below to prevent substantial interfilament fusion, for a period of from five seconds to several hours until the fiber tenacity is increased by at least 50% and to at least 10 grams per denier.

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