Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1985-12-17
1987-12-29
Ives, P. C.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428347, 428 41, 428483, 428218, 428447, 428516, 428330, 428520, 426110, 426107, 2641761, B65B 2506, B32B 2708
Patent
active
047160616
ABSTRACT:
A nonoriented, heat sealable, coextruded, moisture barrier film is disclosed. This film has a base layer ("A") of polypropylene homopolymer, polypropylene copolymer or combinations thereof, a heat sealant layer ("C") of polyester/copolyester or blends thereof and a tie layer ("B") of modified polyethylene homopolymer, modified polyethylene copolymer, modified polypropylene homopolymer, modified polypropylene copolymer, an unmodified polyethylene copolymer or combinations thereof between the base layer ("A") and the heat sealant layer ("C"). This film has three layers ("ABC") or five layers ("CBABC"). This film exhibits a very broad heat seal range and has a moisture vapor transmission rate of from about 0.20 to about 1.0 g/100in.sup.2 /24 hr. This film has a wide variety of applications as a packaging film including such demanding uses as the inside of a microwave popcorn bag. This film significantly improves the shelf life of microwave popcorn compared to conventional films used for this product. This film also exhibits excellent heat seal properties to itself as well as a wide variety of diverse substrates.
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Ives P. C.
Presto Products Incorporated
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