Method for producing a film having a security feature for a card-shaped data carrier, film and card-shaped data carrier

Abstract

A method for producing a film having a security feature for a card-shaped data carrier includes: providing at least one film material having a base color; providing at least one coloring agent; introducing the film material into an extruder of an extrusion apparatus; heating the film material to form a melt; separately heating the coloring agent to form a flowable color; extruding the melt through a nozzle outlet gap of the extrusion apparatus; feeding the flowable color to the extruded melt to form a bead-like mixture; mixing of the flowable color and the extruded melt within the bead-like mixture to form a film. The extruded melt and the flowable color have different material properties so that they do not mix homogeneously, whereby a randomized multi-coloring is visible in plan view of the film. A film and a card-shaped data carrier are associated with aspects of the method.

Dependencies are inferred from the claim text.