Method of making a multilayer biaxially stretched film and heat

Details Method of making a multilayer biaxially stretched film and heat Method of making a multilayer biaxially stretched film and heat

1990-11-09

1997-05-27

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156229, 1562722, 1563084, 156383, 53405, 53456, 53469, 53479, B32B 3128, B32B 3116, B32B 3126, B65B 702

Patent

active

056328435

ABSTRACT:
A heat-shrinkable, multilayer film suitable for use in fabricating bags for packaging primal and sub-primal meat cuts and processed meats. The multilayer film has a first outer layer of a first ethylene-vinyl acetate copolymer, a core layer of a barrier film comprising a polyvinylidene chloride copolymer, and a second outer layer of a second ethylene-vinyl acetate copolymer. The multilayer film is preferably made by co-extrusion of the layers, and then it is biaxially stretched. After biaxial stretching, the multilayer film is irradiated to a dosage level of between 1 megarad and 5 megarads and heat-sealed in the form of a bag. The bag has improved toughness properties and heat-sealing characteristics.

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