Multilayer film with a gas and aroma barrier layer and a process

Details Multilayer film with a gas and aroma barrier layer and a process Multilayer film with a gas and aroma barrier layer and a process

1986-02-25

1986-02-25

Buffalow, Edith

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428349, 428516, 428518, 428520, 15624411, B32B 2700

Patent

active

045728542

ABSTRACT:
The invention concerns a multilayer, preferably sealable film, comprising one or more inner layers; more specifically, (1) an inner barrier layer D containing a saponified ethylene-vinyl acetate polymer having 15 to 60 mole % ethylene units and being saponified to at least 90 mole %; and (2) at least one layer immediately adjacent to the surface of the barrier layer D, which layer is an adhesion-promoting layer C and comprises a modified polymer or the modified polyolefin. All layers of the film are oriented at least biaxially under identical conditions. On one side of the barrier layer D, adjacent to the first adhesion-promoting layer C, a first layer B is located, and an optionally, a sealable layer A, is adjacent thereto. Layer B contains a polypropylene homopolymer and/or a propylene copolymer and/or the material of the layer C and/or the material of the optional layer A. Also disclosed is a process for the preparation of a multilayer film as described, and its use, in particular, in the packaging of oxygen-sensitive goods.

REFERENCES:
patent: 4212956 (1980-07-01), Katsura
patent: 4254169 (1981-03-01), Schroeder
patent: 4367305 (1983-01-01), Satoh et al.
patent: 4400428 (1983-08-01), Rosenthal

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