Case Study: Delrin® Resins meet the need for Static Dissipation in Molded Parts
Delrin® acetal resins dissipate static electricity buildup and have a range of properties delivering design freedom for fuel systems.
Application Description
Fuel filler check valves, fuel filler necks, filler pockets and fuel sender flanges in many cases require resins which dissipate static electricity buildup and have a range of properties delivering design freedom.
Materials Selected and Why
Three new grades of DuPont™ Delrin® answer the demand for resins with antistatic and fuel- resistant properties.
- Delrin® DE10010
- Delrin® 300AS
- Delrin® 300AT
With similar fuel resistance to standard Delrin® resins, Delrin® 300 AS can be used in a wide variety of structural parts and fuel-immersed components, where dissipation of electrostatic charge is required. The new grade is reinforced with carbon fibers and has three times the modulus of standard Delrin® . Maximum stiffness combined with low creep make Delrin® 300 AS a prime material for flanges and other fuel system components.
Delrin® 300 AT is ideal for components exposed to severe impact and vibration forces during assembly and service. Delrin® 300AT has impact resistance similar to standard Delrinâ grades and more than double the impact resistance and elongation of a leading competitive toughened antistatic acetal. The resin withstands intermittent exposure to liquid fuels and fumes and is currently used for fuel filler pocket applications.
Delrin® DE10010 has excellent static dissipation characteristics after fuel exposure, and a smooth surface ideal for tight tolerance applications. The material was specifically designed for fuel filler check valves, but can also be used for filler necks and flanges. Delrin® DE10010 is made with stainless steel fibers, creating a conductive, tough material.
Both Delrin® 300AT and Delrin® 300AS meet rigorous automotive requirements for conductivity (SAE J1645, Rev. Jan. 1999)
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