... . Makes PS foam sheet 2. CE & ISO standard 3. Products for packing industry PS Foam Sheet Extrusion lineTechnics flow as below ... granule (GPPS). In the extruding process, foam agent (such as butane gas or LPG) is injected at high pressure.After extruding, foaming ... ,foam tray etc. It is widely used in the packing for food, fruit, and advertising industrial products ,etc.This equipment adopts ...