First, a TiO2-PP-granulate mixture with a defined TiO2 fraction was created by mixing the components in a 5 L beaker by hand (see experimental part). The PP-granulate was obtained from shredding and granulating left-over PP-printing waste to increase the sustainability of the process. The mixture was subsequently transferred to the heated extruder. The simultaneous heating and rotation of the extruder screw generated the TiO2-PP-composite material. The resulting light brownish mass was transferred into the downstream water bath for solidification.