Thermoplastic multi-layer barrier packaging film and bags...

Details Thermoplastic multi-layer barrier packaging film and bags... Thermoplastic multi-layer barrier packaging film and bags...

B - Operations, Transporting

29

C

18/783

B29C 47/02 (2006.01) B29C 61/06 (2006.01) B32B 27/02 (2006.01) B32B 27/30 (2006.01)

Patent

CA 1283268

64536-609 ABSTRACT Disclosed is a multi-layer heat-shrinkable (oriented) film having a barrier layer of polyvinylidene chloride copolymer and having an outer layer of polyamide. The polyamide layer is directly adhered to the barrier layer. Also disclosed is a process for manufacturing the film therefrom comprising extruding a polyamide layer and a barrier layer such that the polyamide layer is directly adhered to the barrier layer in face to face contact without the use of an intermediate adhesive layer, wherein said polyamide has a melting point below about 160°C , and wherein said polyvinylidene chloride copolymer and said polyamide have been simultaneously coextruded through an unmodified die; orienting the film in at least one direction; and recovering the multi-layer film.

538485

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