Laminated packaging material

1204293
The present invention relates to a laminated packaging material comprising a core layer of paper or paperboard and a polyvinyl alcohol layer as an oxygen barrier layer on one side of the core layer. In order to avoid the use of an excessive amount of polyvinyl alcohol when forming the oxygen barrier layer, an adhesive layer consisting of polyvinyl alcohol and a gelling agent is applied between the polyvinyl alcohol layer and the core layer, which can effectively prevent the polyvinyl alcohol excess The core layer penetrates the core layer, and the adhesive layer is applied at the same time so that the rough surface structure of the core layer becomes smooth and flat, forming a smooth coated surface for the polyvinyl alcohol layer. The amount of gelling agent in the adhesive layer is from 1% to 20% of the total weight of the mixture.