What is Delrin?
Perhaps the most lasting legacy of Model Products Corporation on the history of Lionel trains was its use of a material called Delrin. And their competitors, including Marx and K-Line, quickly started using it too. But what is Delrin, and why was it better than the tried and true stuff Lionel Corporation used?
Delrin is a trademark of DuPont, a type of plastic called Polyoxymethylene POM. You can cast parts from it like other plastics such as styrene or ABS, but it is slippery and self-lubricating.