Degassing process for a worm extruder
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United States of America Patent
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May 16, 1989
Issued Date -
N/A
app pub date -
Nov 12, 1987
filing date -
Dec 30, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for a worm extruder or continuous kneader to produce either a degasses paste or plastic composition is disclosed. A mixture of either solid or liquid organic peroxides in the paste or plastic composition having evaporable constituents are introduced into the device, homogenized and degassed by exposing the mixture to a degassing passage of the extruder. The mixture has a free surface which is more than 40% of the cross-section of the degassing passage and the minimum gas passage cross-section of the return delivery device amounts to at least about 0.1 times the degassing passage cross-section.
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