After calibration, the respective process data in 2016 were selected to assess the environmental impacts of mechanical recycling of waste plastics. When utilizing this data set, users should ensure that they consider the calibrated process data from 2016, specifically from ZEDA in Tianjin, which is indicative of the recycling output and environmental impact from that year. Users should note that the data provided reflects the performance of the mechanical recycling of waste polypropylene at that time and must be applied cautiously if used for projecting future implications. Seasonal and operational variations should be considered, and adjustments may be needed to suit respective recycling contexts and technological progress.