Because of the limitations of mechanical mattress recycling, chemical recycling is increasingly preferred or is used to supplement mechanical recycling. Chemical recycling is a better way of achieving upcycling and circularity. Upcycling is a form of recycling in which the mattress components are of better quality after recycling. The components can be used to make new, high-quality products that have the same or a higher value. During the chemical recycling process, substances are broken down into the original building blocks used to manufacture them originally: polymers and even monomers. The polymers obtained this way are of the same purity as the original synthetics. However, the polymers must sometimes be mixed with new raw materials, because the yield of chemical recycling often is below 100%. Still, this produces a significantly lower CO2 footprint, because far fewer fossil raw materials are used. Chemical recycling technologies are being increasingly further developed to be able to reuse polyurethane foam and other foams from discarded mattresses. But because a mattress consists of multiple materials, further development is required. A lot of effort is therefore being devoted to optimizing chemical recycling technologies. A number of chemical recycling technologies are explained below, without going into detail, in order to provide better insight into how chemical recycling works.