Polymer foam thermoformation process and apparatus therefor
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United States of America Patent
Stats
-
Nov 27, 1984
Grant Date -
N/A
app pub date -
Apr 28, 1983
filing date -
Apr 28, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of thermoforming comprising providing a continuous sheet of thermoplastic polymeric foam, transporting said sheet through an atmosphere of at least predominantly steam at a temperature of at least 215.degree. F. maintaining said sheet in said atmosphere for a time sufficient to cause a decrease in the density thereof; thereafter while under the influence of said temperature, deforming at least a portion of said sheet to a predetermined shape and while so deformed, cooling the same to cause retention of said shape and a system for carrying out said method.
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Cited Art Landscape
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