TECANYL® Plate

TECANYL® PPO is a modified polyphenylene ether, an amorphous blend whose defining property is unusually low moisture absorption at 0.07% in 24 hours. Because it takes up so little water, its electrical characteristics barely move across humidity and temperature: dielectric strength is 500 V/mil, dielectric constant 2.7 at 60 Hz, dissipation factor 0.0007 and volume resistivity 1 x 10^17 Ω·cm. Mechanically it gives 9,000 psi tensile strength at yield, 350,000 psi tensile modulus and 3.5 ft-lb/in Izod impact. Heat deflection temperature is 279°F at 66 psi, long-term service is 220°F and the Vicat point is 310°F.

It is chosen for electrical insulators, switchgear components, connectors and terminal blocks, RF and dielectric hardware, and for water-handling parts such as pump housings, valve bodies and manifolds, where resistance to water, salts, dilute acids and bases plus hot-water stability are the requirement. The UL 94 rating is V-1/V-0 depending on section. It machines well and holds tolerance from the machine into service because there is no moisture-driven growth. Limitations: poor resistance to aromatic and chlorinated hydrocarbons, ketones and esters, notch sensitivity, and UV degradation in outdoor exposure.