Curwood, Inc.

Andrew John Lischefski

Kevin Philip Nelson

Gregory Robert Pockat

Thomas Andrew Schell

The present invention describes thermoformable coextruded film suitable for use in packaging applications having at least a first polymeric layer serving as an outermost exterior-film layer and comprising a cycloaliphatic polyester, an aromatic polyester or blends thereof; a second polymeric layer serving as a thermoforming-assist layer and comprising a polyolefin; and a third polymeric layer serving as an innermost exterior-film layer and comprising a heat-sealing polyolefin material. The films of the present invention are oxygen-permeable in that they exhibit an oxygen transmission rate of between 32-1000 cm/100 in/24 h. atm.

Breathable packaging film having enhanced thermoformability

Multilayer coextruded thermoformable structures for packaging film applications. The multilayer structures having at least a first layer comprising polyethylene terephthalate, a second layer of a first adhesive comprising a blend of at least an acrylate-based resin and either a modified polyolefin or a modified acrylate-based resin; a third layer of a thermoplastic oxygen barrier. The thermoplastic oxygen barrier may comprise ethylene/vinyl alcohol copolymer (EVOH), polyvinylidene chloride, or polyamide, preferably, a polyamide blend containing between 1&#x2013;29% amorphous polyamide. The present invention may further comprise at least 5&#x2013;7 thermoplastic layers.

Packaging films containing coextruded polyester and nylon layers

Multilayer thermoformable structures for packaging film applications. The multilayer structures having at least a first layer of polyester, a second layer of a first adhesive and a third layer of a nylon blend formed into a flexible non-oriented film by coextrusion.

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Oshkosh, WI, United States of America

Andrew John Lischefski