Polypropylene film and process for making same

Details Polypropylene film and process for making same Polypropylene film and process for making same

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) C08J 7/04 (2006.01)

Patent

CA 2146562

A thermoplastic film structure comprising a base layer of a thermoplastic resin which comprises polypropylene and a coat- ing layer of a polyvinylidene fluoride is disclosed. The film is characterized by reduced coefficient of friction, improved anti- blocking characteristics, and enhanced oxygen and water vapor barrier properties. The disclosure also provides a process for making the film in which the polypropylene-containing thermoplastic resin is extruded into a sheet, said sheet oriented in the lon- gitudinal direction to form a monoaxially oriented film, said film coated with the polyvinylidene fluoride and said coated film oriented in the transverse direction.

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