plastic extruder 1) used in the packing of food,fruit advertising ,industrial products 2)ps sheet 3)products widely used plastic extruder 1) Gentian type double-stage series high foam technology.2) raw material is general polystyrene granule.3)procedure:etruding process,vesicant is injected at high pressure.After extruding,foaming cooling,shaping and hauling off,it is winding to finished ps foam ...