Blown film extrusion

Details Blown film extrusion Blown film extrusion

B - Operations, Transporting

29

C

18/528

B29C 49/64 (2006.01) B29C 47/00 (2006.01) B29C 47/88 (2006.01)

Patent

CA 1239261

ABSTRACT A method and apparatus for blown film extrusion of polyolefins wherein a first air ring is disposed adjacent an extrusion die to assist in the formation and stability of a stalk bubble configuration, and a second air ring is disposed downstream of the first air ring to assist in controlled expansion of the bubble at a point where the bubble has dissipated its melt elasticity.

469747

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