| abstract |
The present invention provides a wall for a package (particularly for use with foodstuffs), which wall comprises, or includes a layer comprising, a polymer composition 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 composition include a blend of 96% polyethylene terephthalate and 4% poly (m-xylyleneadipamide) containing 200 ppm cobalt (as a carboxylate salt) as catalyst, with good oxygen impermeance performance when formed into a bottle. |