Polyurethane Recycling (IMAGE) University of Minnesota Caption Researchers from the University of Minnesota and Northwestern University have improved the recycling process of polyurethane through the development of a twin-screw extrusion process that improved mixing and air removal in foams. Credit Sheppard et al., ACS Central Science Usage Restrictions with proper credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.