Classification of polyolefins from building and construction waste using NIR hyperspectral imaging system

► The study was applied to improve polyolefins recovery in MDS-based recycling plants. ► Post-consumer polyolefins classification by HyperSpectral Imaging (HSI) was carried out. ► Polyethylene and polypropylene from complex waste were correctly identified/classified. ► Cut density between polyethylene and polypropylene was defined by HSI based approach. ► HSI is a powerful non-destructive technique to extract features from sample surface.