Stock material or miscellaneous articles – Hollow or container type article – Shrinkable or shrunk
Patent
1987-05-28
1989-01-17
Ives, P. C.
Stock material or miscellaneous articles
Hollow or container type article
Shrinkable or shrunk
428216, 428516, 428520, 428910, 428349, 428323, 428 354, 2641761, 2642091, 264173, 426127, B32B 2708, B65D 2522
Patent
active
047987510
ABSTRACT:
A heat-shrinkable, multilayer film suitable for use in fabricating bags for packaging primal and sub-primal meat cuts and processed meats. The multilayer film contains a barrier layer comprising a blend of vinylidene chloride-methyl acrylate copolymer and vinylidene chloride-vinyl chloride copolymer having between about 2.9 and about 13.5 weight percent methyl acrylate, and between about 2.9 and about 11.6 weight percent vinyl chloride in the blend. The multilayer film preferably has the copolymer blend as a core layer with first and second outer layers preferably comprising ethylene-vinyl acetate copolymer. The film may be extruded without processing difficulties and is preferably irradiated, but the barrier layer does not show significant discoloration with irradiation.
REFERENCES:
patent: 2233442 (1941-03-01), Wiley
patent: 3741253 (1973-06-01), Brax
patent: 4178401 (1979-12-01), Weinberg
patent: 4194039 (1980-03-01), Mueller
patent: 4278738 (1981-07-01), Brax et al.
patent: 4448792 (1984-05-01), Schirmer
Ives P. C.
LeFever John C.
Viskase Corporation
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