An expanded polypropylene (EPP) foam is demonstrating its capabilities in the world's biggest and toughest rally series: Hyundai Motorsport GmbH (Alzenau, Germany) utilizes BASF's Neopolen P polypropylene foam as side impact protection in its race cars for the World Rally Championship (WRC).
Neopolen P reportedly combines low weight with high energy absorption, which remains largely unchanged even after multiple impact loads. This is why the material has already been used previously for safety-critical components in standard cars, for example for steering column padding, fenders, headrests, and knee pads. Furthermore Neopolen P displays isotropic deformation performance and - an essential factor in motorsport - it is resistant to chemicals and oils.
Another crucial advantage for use in the Hyundai i20 WRC is reportedly the functional reliability of Neopolen P across a wide temperature range. This means that the Hyundai Motorsport drivers can rely on Neopolen P in the hot Rally Australia just as much as during the Rally Sweden where temperatures can be as low as -25°C.