Conventional injection molding has limitations in scope of integration within sustainable processing, both at level of process stability and end-product quality. Within this project, focus will be on processing of polyolefins and its composite blends, both virgin and industrial and post-consumer recycled waste streams. Combining modelling tools and experimental validation will offer in-depth understanding of opportunities to optimize conventional injection molding processes, considering complexity of sustainable resources. Flow simulation modelling will predict process parameters based on their macromolecular structure. This comprises integration of blend-related characteristics (i.e. rheological behavior, physical chemical analysis). Derived parameters will be applied at injection molding equipment to evaluate end-product using characterization techniques such as morphology, thermal analysis and mechanical characteristics.