oxygen barrier coating

LLDPE and LDPE (low density polyethylene) are widely used in food packaging and are ideal for food storage due to their high resistance to moisture, tearing and chemicals. The graphene-enhanced zipper bags have reportedly shown an increase in tensile strength of 31% compared to non-graphene LLDPE (linear low-density polyethylene) zipper bags. In addition, the increased mechanical strength of the graphene zipper bags allows light weighting of the plastic, reducing the film thickness from 90µm to 60µm per bag.

The oxygen barrier varnish protects packaged food from oxygen and thus enables recycling-friendly mono-material packaging. 

“Conventional flexible food packaging often consists of several laminated film layers of different chemical natures. Each fulfils a specific function – one of which is the protection against oxygen,” explains Dr Ralf Büscher, Senior Expert Projects Flexible Packaging at hubergroup. “However, packaging that consists of several plastics cannot be recycled at all or only with great effort.”