Revert et al. prepared composite materials by extrusion of a PP matrix containing 10-40 wt% of BSG. The introduction of BSG required a lower operating temperature to avoid combustion risk, as the degradation observed with TGA was found between 250-350°C. The obtained material showed lower mechanical resistance compared to neat PP but a higher thermal stability. Even though water absorption is a common issue when using lignocellulosic fillers such as BSG, its introduction in the PP matrix revealed only a low absorption (< 6 %). Further examples can be found with new composite materials being developed by industry, such as the biodegradable composite materials proposed by Waste Me Up (France) with a PLA matrix containing 5-30 wt% BSG. However, these materials exhibit a low thermal resistance with a temperature of use below 50°C. Additionally, BSG can be used in combination with other fillers for hybrid filler composite materials. This strategy was used by Formela et al. and Zelder et al. to develop materials using a mix of BSG and GTR (Ground Tire Rubber)