Dewatering of plastic materials with controlled gaseous injection
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United States of America Patent
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Jan 22, 1980
Issued Date -
N/A
app pub date -
Jan 22, 1976
filing date -
May 15, 1974
priority date (Note) -
Expired
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Abstract
Plastic materials are dewatered in an extruder by applying heat and pressure and venting out vaporized water; before the plastic is extruded through the die orifice a gas is injected under high pressure into the plastic and this causes gas explosions when the plastic is released through the die orifices. The particles produced have micropores which provide improved workability, and form bales of controllable density.
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