This study emphasizes on closed-loop recycling of wood-plastic composites (WPC) which consists of two
parts. The first part concentrates on re-processing industrial scrap of WPC profiles and its mixture with
freshfeed. The ratio of WPC scrap:freshfeed at 30:70 was found to be the most appropriate. The second
part involves recycling the WPC profiles up to seven passes. Reductions of the molecular weights of
the poly(vinyl chloride) (PVC) matrix were detected due to the molecular chain scission of the shear
stress during re-processing. Mechanical test results demonstrated that the WPC could be recycled as
WPC again without critically affecting its mechanical performance