Heating foam container in unrestricted state to increase stiffness
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United States of America Patent
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Oct 15, 1985
Grant Date -
N/A
app pub date -
Oct 11, 1983
filing date -
Oct 11, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of improving the stiffness of a polystyrene foam container having a sidewall and a bottom, said container having been prepared from a laminate of polystyrene foam having generally spherical closed cells, and, on at least the outer surface thereof, a layer of solid polystyrene; said method comprising heating said container in the unrestrained state, said heating being sufficient to increase the thickness of the sidewall at least 10%, and cup produced by this method.
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