Bottles and jars – Multilayer barrier structure – Coating or lamination
Patent
1975-03-05
1976-09-07
Van Balen, William J.
Bottles and jars
Multilayer barrier structure
Coating or lamination
215DIG6, 428 35, 428315, 428321, 428910, 428913, B65D 1116
Patent
active
039790002
ABSTRACT:
There is disclosed herein improved packages, and methods of forming same, of the type wherein a container, such as for example a glass container, like a bottle or jar, is provided externally thereof with a heat-shrunk, cellular thermoplastic member, circumferentially and snugly engaging a sidewall portion of the container; the improvement resides in employing, as the thermoplastic member, a composite structure, or laminate, having a closed cellular polymeric layer preponderantly of polystyrene having incorporated therein from zero weight percent up to compatible amounts of a copolymer of ethylene and an alkyl ester of alpha-beta monoethylenically unsaturated carboxylic acid or a copolymer of ethylene and vinyl acetate or a copolymer of ethylene and an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, and, in adhered relationship to said cellular layer, a layer of a non-cellular polymeric material preponderantly of ethylene moieties having incorporated therein moieties of vinyl acetate, or an alkyl ester of alpha-beta monoethylenically unsaturated carboxylic acid, or an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof. By having the non-cellular layer disposed intermediate the sidewall portion of the container and the cellular layer, improved glass retention characteristics are achieved with increased economics.
REFERENCES:
patent: 3446760 (1969-05-01), Nowak et al.
patent: 3649437 (1972-03-01), Wolinski et al.
patent: 3663663 (1972-05-01), McAda
patent: 3760968 (1973-09-01), Amberg et al.
Holler Edward J.
Owens--Illinois, Inc.
Rywalski Robert F.
Van Balen William J.
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