... two bubble blowing machinefor producing POF heat-shrinkable film of co-extrusion construction PP/PE/PP. 1. IntroductionPolyolefin (POF) heat ... doll, insecticide, household wares, foodstuffs, cosmetic, canned & bottled beverage, dairy products, pharmaceuticals and cassette tape, etc.GHFB-45/75/45 ... -1800 Three Layer Co-extrusion POF Heat-Shrinkable Film Blowing Machine is a line ...