| 摘要 |
<p>A novel packaging material comprises a substrate (70) bearing a coating (72), said coating having been deposited on the substrate by an ion or magnetron sputtering method. The substrate 70 is typically a thin plastics film, which is advantageously transparent and heat sealable. The coating (72) is typically of an oxide, for example indium oxide or zinc oxide. The packaging material is preferably transparent. It has a low permeability to oxygen and water vapour. It may be used in the packaging of foodstuffs, electronics components and pharmaceuticals, typically in a nitrogen atmosphere.</p> |
