Film structures and packages therefrom useful for packaging respiring food products
AssigneePechiney Emballage Flexible Europe
InventorsJay D. Hodson, Chad M. Perre
Life of this patent
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Abstract
A multilayer laminate useful in the packaging of respiring food products such as swiss-type cheeses which generate or release carbon dioxide gas during storage and wherein said multilayer laminate allows for the egress of said gas while minimizing the ingress of oxygen. The multilayer laminate comprises at least one layer of a low gauge polyamide such as poly (-caprolactam).
Claims19
A multilayer respiring cheese packaging laminate comprising a first outer layer having a thickness of from about 40 gauge to about 80 gauge comprising an oriented polyamide;
- a second layer comprising an adhesive;
- a third layer comprising an oriented polypropylene and a fourth sealant layer comprising a polyethylene copolymer, wherein said first outer layer is adhered directly to said second layer and said second layer is adhered directly to said third layer and said third layer is adhered directly to said fourth layer.
A multilayer respiring cheese packaging laminate having a thickness of from about 2.5 mils to about 3.5 mils comprising a first outer layer having a thickness from about 48 gauge to about 60 gauge comprising oriented poly (z,900 -caprolactam);
- a second layer comprising low density polyethylene, a third layer comprising oriented polypropylene;
- and a fourth sealant layer comprising ethylene vinyl acetate copolymer and wherein said first outer layer is adhered directly to said second layer and said second layer is adhered directly to said third layer and said third layer is adhered directly to said fourth layer and wherein said laminate has an CO2 permeability rate from about 10 cm3 per 100 in2/24 hours at room temperature and 1 atmosphere to about 20 cm3 per 100 in2/24 hours at room temperature and 1 atmosphere and an O2 permeability rate from about 2.5 cm3 per 100 in2/24 hours at room temperature and 1 atmosphere to about 5 cm3 per 100 in2/24 hours at room temperature and 1 atmosphere.
Dependencies are inferred from the claim text.