Method and apparatus for forming a laminated film containing...

Details Method and apparatus for forming a laminated film containing... Method and apparatus for forming a laminated film containing...

B - Operations, Transporting

29

C

18/523

B29C 49/22 (2006.01) B29C 47/06 (2006.01)

Patent

CA 1224610

METHOD AND APPARATUS FOR FORMING A LAMINATED FILM CONTAINING DIFFERENT POLYMER LAYERS ABSTRACT A method for producing a laminated film comprises separately coextruding dissimilar polymer melts through a die, expanding the polymer melts to different degrees and then contacting and adhering the polymer melts together at or near the frost line to produce a laminated film where the various polymer layers thereof are optimally molecularly oriented. The method is particularly useful in producing a film where one of the extruded layers is a polymer foam.

463093

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