... polystyrene granule. In the extruding process, vesicant is injected at high pressure. After extruding , foaming, cooling, shaping and hauling off ... can be made into variety of packaging vessals such as fast food box ,aquatic plate,supermarket tray ,cake tray , KT ... in the packing for food ,fruit ,advertising industrial products and so on . This equipment adopts high speed hydraulic filter changer ...