Sustainable development has always been the focus and inevitable development trend of the chemical industry. In the era of pure pursuit of maximum benefits, the development model of "waste water, waste water and waste water", global warming, resource tension and other serious problems have been brought about by the development model of "waste water, waste water and waste water". The increasing large-scale environmental pollution problems have caused people's concern about the deterioration of the living environment and the earth's climate. In the new era, sustainable development is no longer a new word, but its meaning is constantly deepening and expanding. Enterprises take more social responsibilities and develop themselves in parallel with it.

As we all know, the factories producing polyurethane foam produce a large number of waste products, leftovers and mold overflow every year, and polyurethane elastomers also produce waste products. Every year, the total amount of waste in various fields, such as polyurethane foam and elastomers in end-of-life vehicles, is not small. Reasonable recycling can not only avoid environmental pollution, but also realize the recycling of materials. The vast majority of polyurethane materials are thermosetting, such as soft, hard and semi-rigid polyurethane foam plastics, as well as elastomers used to produce automobile parts, can be recycled by appropriate physical or chemical methods.

The physical recovery methods of polyurethane currently used include bonding molding, hot pressing molding and use as filler. Waste foams such as soft foam leftovers can be made into recycled polyurethane foam by bonding molding, which can be used as sound insulation materials, carpet backing, sports mats and other products. Under certain temperature and pressure, soft foam particles and adhesives can be molded into automobile cushion bench products, and under higher pressure and temperature, they can be molded into hard parts such as pump housing. Hard foam and elastomer are also suitable for this method. Some Japanese companies mix waste elastomer and rubber debris in proper proportion to make paving materials for sports track, tennis court and golf course.