Patent ID: 6569538
Filing Date: 2003-05-27
Classification: B32B,C08L,Y10T

Abstract:
A symmetrically structured, multi-layered film prepared by coextrusion, comprisinga) two outer layers 24 and 24â€² consisting of polyolefins or olefin copolymers or a mixture of these polymers and optionally conventional lubricants and/or antiblocking agents, b) two adjoining inner layers 10 and 10â€² consisting of polyolefins or olefin copolymers or mixtures of these polymers, the melting point of which is lower than 100Â° C., and optionally conventional additives, c) two inner layers 16 and 16â€² which contain a polyamide or a mixture of different polyamides, d) an inner layer 14 adjacent to inner layers 12 and 16 and an inner layer 14â€² adjacent to inner layers 12â€² and 16â€², which contain an adhesion-promoting polymer, e) an inner layer 20 adjacent to inner layers 24 and 16 and an inner layer 20â€² adjacent to 24â€² and 16â€², which contain an adhesion-promoting polymer, f) two inner layers 12 and 12â€², adjacent to inner layers 10 and 10â€² respectively, containing a polyolefin or olefin copolymer or a mixture of these polymers with a melting point higher than that of inner layers 10 and 10â€².