Due to its versatility, low cost, and low density, polypropylene (PP) is one of the most frequently used thermoplastic materials, with widespread application in the automotive and packaging sectors. The aim of this work is the processing of a luminescent film by extrusion utilizing a nanocomposite of polypropylene as matrix polymer for process one optical marker. Polymeric optical markers are few explored due to the difficult of process luminescent polymeric materials with stable luminescence. The materials used were polypropylene (iPP) doped with Terbium(III) complex optical marker in nanocomposites containing MMT. The characterization was done by Differential Scanning Calorimetry (DSC), X-ray Diffraction (DRX) and Fourier Transformed Infrared Spectroscopy (FTIR). Evaluation of thermal stability and luminescent stability showed results for technical applications.