Method of extruding a polystyrene foam using both a physical blo

Details Method of extruding a polystyrene foam using both a physical blo Method of extruding a polystyrene foam using both a physical blo

1982-03-29

1984-06-19

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264DIG5, 264DIG13, 521146, 521910, B29D 2700

Patent

active

044552726

ABSTRACT:
Forming polystyrene foam by extruding polystyrene, nucleating agent, physical blowing agent, and water where the physical blowing agent and water are injected into extruder to provide blowing system. The product produced has small cells at junction points between membranes of the foam.

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