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United States of America Patent
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Jun 4, 1991
Grant Date -
N/A
app pub date -
Mar 23, 1989
filing date -
Jul 27, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a wall for a package, which wall comprises, or includes a layer comprising, a composition comprising a polymer and capable of scavenging oxygen through the metal-catalysed oxidation of an oxidisable organic component thereof. The oxidisable organic component is preferably itself a polymer, and may be the only polymer in the composition. Preferred compositions include a blend of 96% polyethylene terephthalate and 4% poly (m-xylyleneadipamide) containing 200 ppm cobalt as catalyst, with good permeance-versus-time performance (3) when formed into a bottle.
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