Continuous process for the production of polystyrene foamed articles
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United States of America Patent
Stats
-
Jan 17, 1984
Grant Date -
N/A
app pub date -
Dec 15, 1981
filing date -
Dec 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a process for producing economically shaped article of polystyrene foam with a small wall thickness and sufficient strength by a continuous simple operation including a short forming cycle in which the sheet of polystyrene foam having a bulk density of 0.15 to 0.7 g/cm.sup.3, a thickness of 0.3 to 1.0 mm, 5 to 20 cell membranes widthwise of the sheet and a draw ratio of up to 1.25 and containing 0.03 to 0.3 mole/kg of the residual gas of the blowing agent is formed by an extruder and utilized to produce the shaped article.
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