Förpackningslaminat och sätt att framställa förpackningslaminatet samt av förpackningslaminatet framställda förpackningsbehållare med goda syrgastäthetsegenskaper

摘要

The disclosure relates to a laminated packaging material (10) comprising a layer (14) of polyvinyl alcohol which serves as oxygen gas barrier and which is applied on one side of a core layer (11) of paper or paperboard. In order to reduce the quantity employed of polyvinyl alcohol in the laminated packaging material (10), a layer (15) of plastic acting as binder is applied between the core layer (11) and the polyvinyl alcohol layer (14), this plastic layer contributing in evening out the otherwise coarse surface of the fibre layer (11) at the same time as forming an effective barrier against the penetration of polyvinyl alcohol into this layer. By the applied plastic layer (15), and an additional layer (13) of plastic applied onto the polyvinyl alcohol layer (14), the polyvinyl alcohol layer (14) will be encapsulated and well protected against moisture and wet in the finished packaging material (10).