Biaxially Oriented And Heat-Set Multilayer Thermoplastic Film For Packaging
Patent #: 7,063,885
Inventor(s): ugenio Longo, Roberto Forloni and Gregorio Di Cesare
Company: Cryovac, Inc.
Patented is a multi-layer, thermoplastic film, biaxially oriented at a stretching ratio greater than or equal to 3.0:1 in the machine direction and at a stretching ratio greater than or equal to 6.0:1 in the transverse direction. The film comprises a layer made up of at least 50% of a crystalline or partially crystalline co-polyamide characterized by a Tg less than or equal to 100°C and an outer heat-sealing layer comprising a polyolefin. The film is further characterized in that it has a % free shrink at 100°C less than or equal to three in both the machine and transverse directions.
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