Films using blends of polypropylene and polyisobutylene

Details Films using blends of polypropylene and polyisobutylene Films using blends of polypropylene and polyisobutylene

B - Operations, Transporting

32

B

154/140, 400/658

B32B 27/32 (2006.01) C08L 23/10 (2006.01) C08L 23/14 (2006.01) C08L 23/22 (2006.01)

Patent

CA 1309793

ABSTRACT OF THE DISCLOSURE This invention teaches using blends of polyisobutylene and polypropylene copolymer in the formation of single layer films and multiple layer sheet materials. The films and sheet mater- ials are useful as flexible packaging materials. The multiple layer sheet materials may be entirely polymeric or may include layers having non-polymeric components, such as metal. The blends of polyisobutylene and polypropylene copolymer unexpected- ly have the capability of being extruded through a slot die to form a film having a functionally useful mixture of its com- ponents. Thus the invention further includes methods of forming film-like layers of the blends of polyisobutylene and polypropyl- ene copolymer.

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