B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/523
B29C 49/26 (2006.01) B05D 5/08 (2006.01) B29C 33/64 (2006.01) B29C 37/00 (2006.01) B29C 47/00 (2006.01) B29C 55/28 (2006.01)
Patent
CA 1198561
IMPROVED BLOWN BUBBLE PROCESS FOR PRODUCING ORIENTED THIN FILMS Abstract The present invention comprises an improvement upon the blown bubble process for forming thin heat sealable films from an extruded tubular structure. The utilization of a spray nozzle, internal to the extruded tubular structure, to provide a thin inner coating of a liquid polyorganosiloxane greatly reduces the internal film welding of extruded tubular polyolefin materials which internally weld at their processing temperature. Additionally, reduction of the internal welding allows films of reduced thickness to be manufactured.
403969
Mueller Walter B.
Schoenberg Julian H.
Cryovac Inc.
Smart & Biggar
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