1259079
This patent relates to a sheet or sheet-shaped packaging blank comprising a laminate of a core layer and a moisture sensitive gas barrier material layer. Wherein, the gas barrier layer is disposed between the two moisture-resistant material layers, along with the freely exposed longitudinal cut edge of the packaging blank, which can well prevent the intrusion of environmental moisture. The moisture sensitive gas barrier material is preferably composed of PVOH, and is preferably coated as an aqueous dispersion and then dried.
This patent relates to a sheet or sheet-shaped packaging blank comprising a laminate of a core layer and a moisture sensitive gas barrier material layer. Wherein, the gas barrier layer is disposed between the two moisture-resistant material layers, along with the freely exposed longitudinal cut edge of the packaging blank, which can well prevent the intrusion of environmental moisture. The moisture sensitive gas barrier material is preferably composed of PVOH, and is preferably coated as an aqueous dispersion and then dried.
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