| 摘要 |
Producing coated packaging material (10), comprises providing a substrate (12) with a base material (14) made of cellulose, an outer side (16) facing away from a packaging good, and an inner side (18) facing the packaging good; coating the inner side of substrate with at least one layer of an aqueous composition which comprises not > 40 wt.% polyvinyl alcohol and/or its copolymer and a crosslinking agent, and has total solids content of not > 55 wt.%; and drying the layer and crosslinking polyvinyl alcohol and/or its copolymer using crosslinking agent to form a barrier layer for hydrophobic compounds. An independent claim is also included for a packaging material comprising the substrate, and a layer system arranged on the inner side of the substrate, which comprises the barrier layer for hydrophobic compounds, comprising crosslinked polyvinyl alcohol copolymers. |
