| 摘要 |
A container (22) includes a shell (24) made from a polymer, for example P ET, and incorporating a catalyst, for example a palladium catalyst. A closur e (40) incorporates a plug which includes a source of hydrogen, for example a hydride. In use, with container (22) including a beverage and closure (40) in position, the headspace in the container will be saturated with water va por. This vapor contacts the hydride associated with plug (42) and as a resu lt the hydride produces molecular hydrogen which migrates into the polymer m atrix of shell (24) and combines with oxygen which may have entered the cont ainer through its permeable walls. A reaction between the hydrogen and oxyge n takes place, catalysed by the catalyst, and water is produced. Thus, oxyge n which may ingress the container is scavenged and the contents of the conta iner are protected from oxidation. |
