Metallized multilayer packaging film

Stock material or miscellaneous articles – Composite – Of metal

Patent

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Details

4283044, 428327, 428344, 428349, B32B 1508, B32B 326, B32B 712, B32B 516

Patent

active

058276157

ABSTRACT:
A metallized film substrate having a core layer comprising a film-forming base polymer, a metal receiving skin layer of an ethylene vinyl alcohol copolymer (EVOH) on a surface of the core layer, the film substrate containing a metal deposit, e.g., aluminum, on the EVOH copolymer surface, and a polymeric low temperature sealable coating comprising a copolymer of about 10 to 35 wt. % of at least one .alpha.,.beta.-ethylenically unsaturated carboxylic acid with about 65 to 90 wt. % of ethylene, an alkyl acrylate or methacrylate, acrylonitrile, or mixtures thereof, on the surface of said metal deposit. For adhesion of the EVOH, the core layer may either (i) be blended with a maleic anhydride modified polyolefin or (ii) have an adhesion-promoting tie layer of a maleic anhydride-modified polyolefin on a surface which is in contact with the EVOH.

REFERENCES:
patent: 3433777 (1969-03-01), Brunson
patent: 4198327 (1980-04-01), Matsumoto et al.
patent: 4377616 (1983-03-01), Ashcraft et al.
patent: 4632869 (1986-12-01), Park et al.
patent: 5126198 (1992-06-01), Schinkel et al.
patent: 5153074 (1992-10-01), Migliorini

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