After calibration, the respective process data in 2016 were selected to assess the environmental impacts of mechanical recycling of waste plastics. When using this data set, users should take into account the specific year of the data (2016) and the geographical location of the process (ZEDA in Tianjin, China). It is important to ensure the recycling process data relevance to the assessed product system and its geographical market. Methodological adjustments may be required for a different temporal or geographical context. Additionally, users must consider the inclusion of the end-of-life phase, particularly the potential environmental benefits linked to waste polystyrene mechanical recycling as opposed to disposal or incineration.