Multiple layer films containing oriented layers of nylon and eth

Details Multiple layer films containing oriented layers of nylon and eth Multiple layer films containing oriented layers of nylon and eth

1986-07-22

1989-04-04

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428349, 4284758, 4284761, 428516, 428910, 428354, 428522, B32B 2708

Patent

active

048185922

ABSTRACT:
A multiple layer sheet structure has oriented layers of nylon and EVOH. Additional layers may or may not be utilized, and may or may not be oriented. Where additional layers are used, one of the additional layers, on the exterior surface of the structure, is preferably heat sealable. The structure shows improved impact resistance, after retort processing, over similar structures not having oriented nylon and EVOH layers. In certain embodiments, retort processed pouches made from the packaging structures have improved stress crack resistance when dropped onto a hard surface.

REFERENCES:
patent: 4355721 (1982-10-01), Knott et al.
patent: 4475241 (1984-10-01), Mueller et al.
patent: 4501798 (1985-02-01), Koschak et al.
patent: 4640852 (1987-02-01), Ossian

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