Semitron ® ESd 490HR is a static dissipative reinforced PolyEtherEtherKetone (PEEK). This material has similar general properties as Semitron ® ESd 480, but a higher resistivity value, in the range of 109 to 1011. It is thermally stable to temperatures of 490°F (270°C) without degradation and offers high structural strength and stiffness combined with excellent dimensional stability. This material is available in sheet and rod forms and is black in color.
Semitron ® ESd 490HR is also non-sloughing to minimize contamination due to wear so it is ideal for making nests, sockets and contactors for test equipment and other electronic device handling components. While typical carbon-fiber-enhanced products become irreversibly more conductive when exposed to moderate voltage, Semitron ® ESd 490HR maintains its dielectric performance while maintaining its mechanical properties.
In addition, Semitron ® ESd 490HR exhibits the excellent chemical resistance properties of standard PEEK, including resistance to weak acids, all alkalies, aliphatic and aromatic hydrocarbons, ketones, esters, chlorinated solvents, alcohols, and inorganic salt solutions (all at 73癋). Semitron ® ESd 490HR is not resistant to concentrated acids.
