TECANYL® 8078 Rod

TECANYL® 8078 is a modified polyphenylene ether - an amorphous blend of PPE with polystyrene that gives the family its defining combination of very low moisture pickup, strong hydrolytic stability and dimensional stability that survives repeated wet and dry cycling. Unfilled modified PPE takes up roughly 0.07% water in 24 hours, holds a dielectric constant near 2.7 that stays essentially flat across frequency, and shows volume resistivity around 1 x 10^17 ohm-cm. Heat deflection temperature for unfilled grades runs about 254°F at 264 psi with long-term service near 220°F. Impact strength is good, and the polymer resists water, most salt solutions, dilute acids and bases.

PPE gets specified where water and electricity meet: pump and valve bodies, water meter and filtration housings, manifolds, impellers and potable-water distribution hardware, plus electrical insulators, coil forms, connector bodies and appliance and automotive components. It machines cleanly to tight tolerance with standard tooling and low cutting forces, and because it barely moves with humidity, finished dimensions stay put. It bonds, solvent welds and ultrasonically welds well. Limitations: PPE is attacked by aromatic and chlorinated hydrocarbons, ketones and esters, so keep solvent-based cleaners away from it, and it is not UV stable for unprotected outdoor use. Confirm grade-specific values against the certification supplied with the material.