multilayered films produced by coextruding or laminating films comprised of at least one layer of polymethylpentene , at least one layer of a polyamide and an intermediate polymeric adhesive layer . the polyamide layer allows the polymethylpentene layer to be stretched up to 6 times its original length . such a high orientation ratio for the mulitlayered film increases the mechanical strength and toughness properties of the film . the mulitlayered films are suitable for use as release films for high temperature composite applications such as printed circuit boards .