Blown bubble process for producing oriented thin films

Details Blown bubble process for producing oriented thin films Blown bubble process for producing oriented thin films

1984-09-25

1986-09-16

Robinson, Ellis P.

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427 35, 427230, 427236, 427289, 427299, 427387, 428 36, 428349, 428352, 428447, 428451, B32B 2732, B32B 3102

Patent

active

046122451

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.

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Analytical Services, Technical Service Request No. 1-3479, Apr. 27, 1979.

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