Stabilizing melt crystallization temperature in arylene sulfide

Details Stabilizing melt crystallization temperature in arylene sulfide Stabilizing melt crystallization temperature in arylene sulfide

1983-06-15

1985-02-26

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264126, 264235, 264322, 264345, 264346, 264DIG65, 528388, B29B 300

Patent

active

045017131

ABSTRACT:
A method for stabilizing the Tmc of PPS subjected to heat treatment in a temperature range between 240.degree. C. and 320.degree. C., particularly during the heating process of an extrusion operation, by increasing the tmperature of the polymer through the 240.degree. C.-320.degree. C. range at a rate of at least 20.degree. C. per minute or by subsequently raising the temperature of the polymer to at least 350.degree. C. for a time sufficient to stabilize the Tmc of the polymer.

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"Thermofoil Heat Fusers", Bulletin TF-5, revised Mar. 1975, Minco Products Inc., Minneapolis, Minnesota.
"Thermofoil Heaters", Bulletin TF-4, revised Aug. 1973, Minco Products Inc., Minneapolis, Minnesota.

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