Process for removing moisture and volatiles from pellets in sing

Details Process for removing moisture and volatiles from pellets in sing Process for removing moisture and volatiles from pellets in sing

1999-04-07

2000-10-10

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

To degas or prevent gas entrapment

26421121, 425203, 425208, 366 75, B29C 4774

Patent

active

061298735

ABSTRACT:
In a process for extruding a thermoplastic resin in a single screw extruder, a barrel of a single screw extruder has a channel, a feed section and a first melt seal located after the feed section. The process is improved by supplying solid polymer into the feed section and venting moisture extracted from the polymer during the conversion of the polymer from a solid to a melt into a vent area and through a rear vent positioned in the feed section. An unfilled area within the channel of the barrel between the rear vent and the first melt seal forms the vent area.

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