... Product Description The three layer film blowing machine features as follows: 1, Die head is layer type spiral mandrel, ... counting device, vertical cutting device, cooling water row pipe, film spreading roller, scrap collecting device. Use ... , MLLPE, Pa by horizontal extrusion up blown.The film has good insulation, for instance holding temperature ... 50mm 55mm 65mm Screw L/D L/D28:1 L/D28:1 L/D28:1 Screw ...