... general polystyrene granule. In the extruding process, vesicant is injected at high pressure. After extruding , foaming, cooling, shaping and hauling ... be made into variety of packaging vessals such as fast food box ,aquatic plate,supermarket tray ,cake tray , KT board ,instant ... tray etc. It is widely used in the packing for food ,fruit ,advertising industrial products and so on . This equipment ...