![Extruded opaque sheet of thermoplastic from printed film scrap (left) and translucent sheet produced through a supercritical CO2 extrusion process.](https://resource-recycling.com/plastics/wp-content/uploads/sites/4/2021/09/AIMPLAS-merge.jpg)
Extruded opaque sheet of thermoplastic from printed film scrap (left) and translucent sheet produced through a supercritical CO2 extrusion process. | Courtesy of AIMPLAS
A form of pressurized carbon dioxide can be used to remove contaminants from post-consumer plastic melt, improving the quality of the final pellets, according to a research organization.