Fiberfil Engineered Plastics has acquired DSM Engineering Plastics’ North American custom compounding polypropylene business as well as a  manufacturing site in Stoney Creek, ON Canada. The sale of its polypropylene compound business is another step in DSM Engineering Plastics’ global strategy to focus on core thermoplastic resins, specifically nylon 6, nylon 46, copolyester elastomers, and specialized polyamide nylon 66 compounds, according to Auke Rottier, president of DSM Engineering Plastics