The introduction of polymer based structures as packaging materials for foodstuffs has been increasing over the last decades. The main commercial appeal of these materials lies in their ability to offer a broad variety of tailor-made properties and yet be cheap, and easily processed and conformed into a myriad of shapes and sizes. However, one of the limiting properties of polymeric materials in the food packaging field is their inherent permeability to low molecular weight substances, including permanent gases, water and organic vapours. This has boosted the interest for developing new resins with higher barrier properties.