HIGH TEMPERATURE RELEASE FILMS

摘要

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.