Italian automotive fuel-delivery components manufacturer Dytech-Dynamic Fluid Technologies has chosen to use EcoPaxx nylon 410 from DSM Engineering Plastics (U.S. office in Birmingham, Mich.), which is based on 70% castor oil, for the fuel vapor separators it produces for Ferrari and Maserati sports cars. Specifically, halogen-free flame retardant grade Q-KGS6 was selected to increase the fire safety of the cars by combining flame retardancy (Ul 94 V-0 rating at 0.7 mm.) with a high level of chemical resistance, as needed for this application.
Today, fuel lines themselves have a coextruded outer cover in a flame-retardant thermoplastic, but fuel vapor separators are still most often made from a non-flame-retardant nylon. In addition, EcoPaxx is highly resistant and impermeable to conventional gasoline fuels (E10) as well as the more sustainable E85 fuel. In the SHED (Sealed Housing for Evaporative Determination) test, the EcoPaxx fuel vapor separators showed a very low permeation level for E10 of 0.002 grams/24 hr. The high thermal stability of EcoPaxx is demonstrated by its maximum continuous use temperature of 175 C. It also features very good dimensional stability, as proven by short-term aging at 100 C, and it outperforms current materials used in low-temperature impact tests carried out at -30 C. The material also passed tube extraction and impact tests after thermal and fuel aging, as well as fatigue resistance.