Multiple layer films containing oriented layers of nylon and ethylene vinyl alcohol copolymer
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United States of America Patent
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Feb 3, 1987
Grant Date -
N/A
app pub date -
Nov 28, 1984
filing date -
Nov 28, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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