| 摘要 |
<p>A multi-layer polymeric structure suitable for packaging foodstuffs has main outer polymeric layers (1, 2) between which a moisture-sensitive, oxygen barrier layer (3) is embedded, layer (3) being ethylene-vinyl alcohol or polyvinyl alcohol polymers and being adhered to the outer layers (1, 2) by polymeric adhesive (4, 5). To protect layer (3) from degradation of its oxygen barrier qualitites by moisture, e.g. contained in a foodstuff or arising during sterilization, the polymeric structure incorporates drying agents or desiccants most conveniently compounded with the polymeric adhesive (4, 5).</p> |
