... efficiency,popular 3.hign quality,hign speed 4.two-head,time saving two-head plastic film blasting machine Uses and ... bags, widely used in food, clothing, textiles, industrial packaging. Extruder barrel and screw are of high quality alloy steel nitrided ... resistance, this unit has been scientifically designed to pay a two-head extrusion, high output, effective, environmentally friendly energy.Main ...