A composite sheet has a substrate layer, a coating layer and a flexible adhesive layer. The substrate layer is preferably a polyester film. The coating layer contains a layer mineral. The flexible adherent layer has a percentage elongation to break of greater that 150%. The composite sheet exhibits oxygen...http://www.google.co.uk/patents/US5667886?utm_source=gb-gplus-sharePatent US5667886 - Composite sheet having improved adhesive properties and methods of making same
