Depolymerization or solvolysis is the preferred method for recovering waste streams such as polyurethanes (e.g. in mattresses) and polyamides, provided that large quantities of high-quality waste streams are available. In this process, the plastic waste is broken down into smaller molecules, such as its original monomers. These monomers can then be purified, reassembled and used to produce new plastics. To be successful, the technology requires relatively homogeneous and purified waste streams. Unfortunately, suitable EPR systems to access waste streams are not yet widely available.