In plastics technology mixing processes are omnipresent. High performance plastics only arise through mixing of many individual formulation components. High viscous melts need to be mixed in many cases, while high mixing quality must be ensured. In laminar mixing processes primarily a differentiation is made between distributive and dispersive mixing. Distributive mixing is widely understood as only distributing the mixing components, while in dispersive mixing the components are deformed and finally broken up. Findings under real operation conditions about the ongoing processes during the mixing are necessary for model development. However, frequently representative fluids are used in experimental investigations of mixing processes instead of real plastic melts. In this work plastic melts under real operation conditions will be used for the investigation of dispersive mixing instead of representative fluids. For model development and validation a novel experimental setup will be realized. By means of a linear actuator and a specially designed injection nozzle small droplets are generated, which are inserted into the main flow of a continuous phase shortly before a shearing element. Afterwards, samples can be taken from the extrudates for microscopic examination. On the basis of these findings, a new simulation model will be developed to predict the droplet behavior under real processing conditions later on. The new solution approach is expected to contribute to the combination of simulation and experiment under real mixing conditions for the first time. Because, in the course of this approach real plastic melts will be used instead of representative model fluids, a high gain of knowledge about polymer mixing processes is expected.