METHOD FOR PRODUCING A METAL-PLASTIC FILM COMPOSITE, METAL-PLASTIC FILM COMPOSITE PRODUCED BY THIS METHOD, AND THE USE THEREOF FOR PRODUCING PACKAGING CONTAINERS

摘要

A process is disclosed for producing a metal-plastic film composite material by sheet die extrusion of a statistical polypropylene copolymer into a plastic film. After leaving the sheet die, the polypropylene is cooled by means of cooling cylinders and the plastic film thus obtained is laminated onto at least one of the main surfaces of a metal sheet. The process is characterized in that the polypropylene copolymer is directly cooled after leaving the sheet die of the extruder down to temperatures between 0 C and 15 C. Once the plastic film has been laminated onto the metal sheet by means of a solvent-containing or aqueous adhesive, the metal-plastic film composite material thus obtained is cooled down to temperatures from 0 C to 25 C, when the film is laminated onto the metal sheet at temperatures above the melting point of the polypropylene copolymer, or when the plastic film is laminated onto the metal sheet by means of a coextruded bonding agent the metal-plastic film composite material thus obtained is cooled down to temperatures from 0 C to 25 C. Also disclosed is a metal-plastic film composite material produced according to this process and its use for producing packaging containers.