Multilayer plastic film, useful for packaging a cook-in foodstuf

Details Multilayer plastic film, useful for packaging a cook-in foodstuf Multilayer plastic film, useful for packaging a cook-in foodstuf

1996-07-05

1998-06-02

Thibodeau, Paul J.

Stock material or miscellaneous articles

Hollow or container type article

Shrinkable or shrunk

428 354, 428 367, 428213, 428214, 428215, 428332, 428515, 428516, 428514, 428520, 428910, 26417315, 26417316, 2642902, B32B 2728, B32B 2732

Patent

active

057596484

ABSTRACT:
A multilayer, preferably biaxially oriented, film suitable for processing and/or packaging cook-in foods such as ham, roast beef and poultry having an excellent combination of oxygen barrier, heat seal and optical properties comprising at least five essential sequential layers with a first layer of a copolymer of propene and at least one C.sub.2 -C.sub.8 .alpha.-olefin having a propene content of at least 60 wt. % and preferably having a melting point <140 .degree. C.; a second layer of (1) a first copolymer of ethylene and at least one C.sub.4 -C.sub.8 .alpha.-olefin having a density of from 0.900 to 0.915 g/cm.sup.3 and a melt index of less than 1.0 dg/min., (2) a second copolymer of ethylene with from 4 to 18%, preferably 4 to 12%, of a vinyl ester or alkyl acrylate, (3) an anhydride-modified third copolymer of ethylene with at least one .alpha.-olefin, a vinyl ester or an alkyl acrylate, and (4) optionally a fourth copolymer of ethylene and at least one C.sub.3 -C.sub.8 .alpha.-olefin having a density less than 0.900 g/cm.sup.3 and a melting point less of less than 85.degree. C.; a third EVOH layer; a fourth layer like the second layer; and a fifth layer of a first copolymer of ethylene with at least one C.sub.4 -C.sub.8 .alpha.-olefin having a density of from 0.900 to 0.915 g/cm.sup.3 and a melt index of less than 1.0 dg/min., and a second copolymer of ethylene with from 4 to 18%, preferably 4 to 12%, of a vinyl ester or alkyl acrylate, and optionally a third copolymer of ethylene and at least one C.sub.3 -C.sub.8 .alpha.-olefin having a density less than 0.900 g/cm.sup.3 and a melting point less of less than 85.degree. C.

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