Polymer foam thermoformation process and apparatus thereof

Details Polymer foam thermoformation process and apparatus thereof Polymer foam thermoformation process and apparatus thereof

B - Operations, Transporting

29

C

18/653

B29C 67/20 (2006.01) B29C 44/56 (2006.01) B29C 51/42 (2006.01) B29C 35/04 (2006.01)

Patent

CA 1223705

IMPROVED POLYMER FOAM THERMOFORMATION PROCESS AND APPARATUS THEREFOR ABSTRACT A method of thermoforming comprising providing a continuous sheet of thermoplastic polymeric foam, transporting the sheet through an atmosphere of at least predominantly steam at a temperature of at least 102°C (215°F), maintaining the sheet in the atmosphere for a time sufficient to cause a decrease in the density thereof; thereafter while under the influence of the temperature, deforming at least a portion of the sheet to a predetermined shape and while so deformed, cooling the same to cause retention of the shape; and a system for carrying out the method.

452937

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