Patent ID: 6890661

Claim:
A multilayer structure comprising a layer (L) containing a composition comprising 10% to 100% by weight of isotactic polypropylene homopolymer or copolymer obtained by metallocene catalysis (miPP); 0% to 90% by weight of polyethylene (A) homopolymer or copolymer; 0% to 90% by weight of polymer (B) selected from the group consisting of isotactic polypropylene homopolymer or copolymer obtained by Ziegler-Natta catalysis (B1), poly-(1-butene)homopolymer or copolymer (B2), polystyrene homopolymer or copolymer (B3), a blend of (B1) and (B2), a blend of (B1) and (B3), a blend of (B2) and (B3), and a blend of (B1), (B2) and (3); the percentages beina based on the total weight of the isotactic polymer (miPP) and any polymer (A) and polymer (B); and said polymer or polymers being grafted with a functionalised monomer; and, directly attached to said layer (L), a layer (E), which is polar, nitrogenous or oxygenated, a mineral oxide deposited on a polymer, or metallic or meralloplastic.