Oriented multilayer heat sealable packaging film

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer

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428414, 4284763, 428484, 428518, 428520, 428353, B32B 2700

Patent

active

050931946

ABSTRACT:
An oriented heat sealable multilayer structure. The structure comprises a substrate having a first surface and a second surface, the substrate comprising a polyolefin film; a polymeric heat sealable layer on the first surface of the substrate, the layer comprising a polymeric material selected from the group consisting of a terpolymer of ethylene, propylene and butene-1, a random copolymer of ethylene and propylene, and blends thereof; a primer coating on the second surface of the substrate; and a water vapor and gas barrier layer on the primer coating, the water vapor and gas barrier layer selected from the group consisting of a vinylidene chloride copolymer containing at least about 50% of vinylidene chloride and an interpolymer comprising a minor amount of acrylic acid, methacrylic acid or mixtures thereof and a major amount of neutral monomer esters comprising methyl acrylate, ethyl acrylate, methyl methacrylate or mixtures thereof. A method for producing the heat sealable multilayer film structure is also provided.

REFERENCES:
patent: 3719629 (1973-03-01), Martin et al.
patent: 3753769 (1973-08-01), Steiner
patent: 4214039 (1980-07-01), Steiner et al.
patent: 4439493 (1984-03-01), Hein et al.
patent: 4447494 (1984-05-01), Wagner, Jr. et al.
patent: 4564558 (1986-01-01), Touhsaent et al.

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