Co-extruded PVC food packaging film and process for its production

摘要

A process for producing a multi-layered co-extruded food packaging film of polyvinyl chloride (PVC) or a comparable chloro-ethene derivative with migration behavior of plasticizers in the packaged food reduced compared to monolayer PVC films, comprising the steps: - providing at least one melt of polyvinyl chloride (PVC ) or a comparable chlorine-ethene derivative and one or more polymer and / or monomer plasticizers, - producing a multilayer film from at least two film layers by coextrusion of the melt (s) of polyvinyl chloride (PVC) or a comparable chlorine Ethene derivative and the one or more polymer and / or monomer plasticizers, which arise at the transitions of the individual co-extruded film layers boundary layers that have migration-inhibiting retention properties for the plasticizers, so that in the resulting from the process food packaging film Total layer thickness of the multilayer film 5 microns to 25 microns and the global migration of plasticizers from the composite of food film in the packaged food is not more than 10 mg / dmFilie.