MULTILAYER SHEET-OR TUBE-TYPE FOOD CASING OR FOOD FILM

摘要

The present invention proposes a novel multilayer sheet- or tube-shaped food casing or food film which is produced by the blast drawing process and is biaxially oriented by the triple bubble process, designed as food packaging in the form of shrink bags, sealable films, wrapping films or the like. This novel food casing or food film has at least nine layers, of which one EVOH layer has been designed as oxygen barrier embedded symmetrically between two PA layers for strength, these in turn being symmetrically enclosed by two PO layers for the water-vapour barrier, where the external layer is formed by a material resistant to high temperature, e.g. PET, which can also give, alongside the excellent optical properties, speeds (cycle number) in further processing which are markedly higher than those known hitherto.