| 摘要 |
<p>The disclosure relates to a laminated packaging material (10) for liquid-tight, dimensionally stable packages possessing superior gas-barrier properties, in particular oxygen gas barrier properties. The packaging material comprises a core layer (11) of paper or paperboard and outer, liquid-tight plastic coatings (12, 13) preferably of polyethylene. Between the core layer (11) and the one outer, liquid-tight plastic coating (12) of the laminated packaging material (10), there is applied, by a coating process, a gas barrier layer (14) of polyvinyl alcohol, which, for the purposes of rendering the polyvinyl alcohol layer (14) pliable and water-resistant, also includes a polysaccharide, for example chitosan, and a chemical cross-linking agent.</p> |
