GENERAL PROPERTIESSemitron ® 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°F). Semitron ® ESd 490HR is not resistant to concentrated acids.
SEMITRON® ESd DESCRIPTIONSemitron® ESd is a family of static dissipative products designed for use where electrical discharge in operation is a problem. They are commonly used for sensitive electronic components including integrated circuits, hard disk drives, and circuit boards. Semitron® products are also an excellent choice for material handling applications, and components in high speed electronic printing and reproducing equipment.
Semitron® ESd products are inherently dissipative. They do not rely on atmospheric phenomena (humidity) to activate, nor are surface treatments used to achieve dissipation. Static electicity is dissipated through these products as readily as it is dissipated along the surface.
TYPICAL PROPERTIES of Semitron ESd 490HR
|ASTM or UL test||Property||Semitron ESd 490HR|
|D570||Water Absorption, 24 hrs (%)||0.18|
|D570||Water Absorption, Saturation (%)||1.65|
|D638||Tensile Strength, Ultimate (psi)||14,000|
|D638||Tensile Modulus (psi)||940,000|
|D638||Tensile Elongation at Break (%)||2.3|
|D790||Flexural Strength (psi)||21,000|
|D790||Flexural Modulus (psi)||950,000|
|D695||Compressive Strength (psi)||26,000|
|D695||Compressive Modulus (psi)||600,000|
|D785||Hardness, Rockwell||R123 / M105|
|D256||IZOD Notched Impact (ft-lb/in)||1.0|
|D696||Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
|D648||Heat Deflection Temp (°F / °C)
at 264 psi
500 / 260
|-||Max Operating Temp (°F / °C)||475 / 246|
(x 10-4 cal/cm-sec-°C)
|D149||Dielectric Strength (V/mil) short time, 1/8" thick||-|
|D150||Dielectric Constant at 1 MHz||5.33|
|D150||Dissipation Factor at 1 MHz||0.227|
|EOS/ESD S11.11||Surface Resistivity (ohms/square)||109 - 1011|
|Mil-B-81705C||Max Static Decay (seconds)||< 2|
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.PEEK is a registered trademark of Victrex plc.
All values at 73°F (23°C) unless otherwise noted.