B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1171
B29C 59/00 (2006.01) B26F 3/00 (2006.01) F27B 9/28 (2006.01) B29C 37/00 (2006.01)
Patent
CA 1112831
ABSTRACT A continuous process for forming a longitudinal heat-weakened strip in a cross-lapped oriented polyolefin film is disclosed. The process comprises directing heat from two longitudinally aligned sources, to opposing sides of a travelling web of the cross-lapped oriented polyolefin film, to such an extent that the tensile breaking strength at the heat-weakened strip so formed is in the range of 20 to 100 Newtons per centimetre of length of film. The film so formed is particularly useful for packaging slurry explosives.
313759
Du Pont Canada Inc.
Mccallum Brooks & Co.
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