Dupont has recently developed a new process technology - A closed-loop Nylon recycling process - for which it has been awarded the 2004 Environmental Award for New Technology in Materials and Processes by the Society of Plastics Engineers (SPE). DuPont was recognised for developing the technology and Denso along with DuPont were both acclaimed for the program to test the technology viability. This is a closed-loop Nylon recycling process that can convert parts made of glass or mineral filled Polyamide 6 or 66 into first quality material in an economically viable and environmental friendly way. This process generates resin that is essentially equivalent to virgin nylon and helps promote the long-term economic viability for recycling. Composite Recycle dissolves used polyamide and then filters away contaminants and fillers. The molecular weight of the recovered polyamide is increased to desired levels for the end application.

Used radiator end tanks were recycled into new radiator end tanks in the test process.The results were very heartening and established this as one of the most effective recycling technologies for increasing the recycle ratio of end of life vehicles. The ability to reclaim large glass and mineral-filled nylon components such as radiator end tanks can aid automakers meet new regulations and benefit the society by reducing landfill waste.