... blown die, dual-lip cooling ring, IBC, bubble 3-Layer Co-Extrusion Film Blowing Machine is used for producing tubular film ... dual-lip cooling ring, IBC, bubble stabilizing device, multi-layer rotation take-off, corona treatment station, central-guide friction ... -line inspection, safety protection and startup protection Film struction: 3 layers co-extruding A/B/CSuitable material: LDPE, LLDPE, HDPE, ...