Composite film

摘要

The invention relates to a composite film (10) for closing a container by sealing the composite film against a circumferential sealing surface of the container or of a cap ring to be connected to the container, wherein said composite film comprises a support layer (14) made of a metal film and a sealing layer connected to the metal film. The sealing layer comprises a coextrusion layer having a cohesively breaking intermediate layer (18) and adhesion promoter layers (16, 20) disposed on both sides of the intermediate layer (18). The composite film is suitable for tight sealing against sealing surfaces made of polished tinplate.