A new acetal from DuPont Engineering Polymers, Wilmington, Del., combines high impact and mechanical performance with high flow (7 MFR), which improves weld-line strength. Its cost is equivalent to standard grades. Delrin 300CP is aimed at automotive fasteners, seat-belt components, levers, brackets, and hardware for windows and doors. The material offers consistent impact performance over a broad temperature range. For example, notched Charpy impact of 10.5 kJ/m2 at 23 C only falls to 10 kJ/m2 at -30 C. High elongation at yield (22%) and high stiffness (440 MPa) and creep resistance help extend use in continuously loaded, spring-elastic components. For more property data, visit www.ptonline.com/plaspec.
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Another major investment now underway.