C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B29C 55/00 (2006.01) B29C 55/06 (2006.01) B32B 27/08 (2006.01)
Patent
CA 2118926
2118926 9306158 PCTABS00021 Oriented poly(chlorotrifluoroethylene) based films comprising up to 1 pourcent by weight of copolymerizable comonomers as well as oriented poly(chlorotrifluoroethylene) films formed essentially of a homopolymer comprising no copolymerizable comonomers are provided; all of the films are formed from low zero strength time film forming resin compositions which are highly amorphous in nature, and which are subjected to a process which includes the steps of: preheating the film above its glass transition temperature, stretching the film to provide a film having a stretched:unstretched ratio of between about 2:1 to about 5:1, followed by annealing the film. The films feature excellent resistance to vapor transmission, particularly water vapor, and feature good physical strength characteristics.
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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