Semitron™ ESd 420 PEI electrostatic dissipative shapes exhibit high strength and stiffness and excellent resistivity in the 10E5 to 10E8 ohms per square range. Semitron™ ESd 420 PEI does not rely on atmospheric phenomena (humidity) to activate, nor are surface treatments used to achieve dissipation. This grade in particular excels in high temperature environments, making it ideal for extreme structural applications in semiconductor and electronics markets.
PROPERTIES
High strength and stiffness
Low stress for tight tolerance machining
Good wear resistance
High thermal performance
Tensile strength of 11,500 psi
Flexural modulus of 650,000 psi with 2.9% moisture absorption
Thermal Properties
Property
Value
Heat Deflection Temperature at 1.8MPa (264 psi) (ºC)
210
Continuous allowable service temperature in air
170
Mechanical Properties
Property
Value
Tensile Strength (MPa)
57
Tensile Modulus of Elasticity (MPa)
3,850
Compressive stress at 1% nominal strain (MPa)
33
Compressive stress at 2% nominal strain (MPa)
68
Compressive stress at 5% nominal strain (MPa)
147
Flexural Strength (MPa)
Charpy Impact Notched (kJ/m²)
2.0
Chemical Properties
Property
Value
Hot Water / Steam
Acceptable
Acids, Weak
Acceptable
Acids, Strong (pH 1-3)
Limited
Alkalies, Weak
Acceptable
Alkalies, Strong (pH 11-14)
Not acceptable
Hydrocarbons - Aromatic
Not acceptable
Hydrocarbons - Aliphatic
Limited
Ketones, Esters
Not acceptable
Chlorinated Solvents
Not acceptable
Alcohols
Acceptable
Inorganic Salt Solutions
Acceptable
Electrical Properties
Property
Value
Dielectric Strength (kV/mm)
Certification Properties
Property
Value
FDA
Not compliant
European Food Approval
Not compliant
NSF
Not compliant
3A-SSI
Not compliant
Canada AG
USDA
Not compliant
Flammability (UL Rating)
V-0
Medical use
SEMICON - ESd materials
Miscellaneous Properties
Property
Value
Base Material
PEI
Brand Family
Colors
Black
Density (g/cm3)
1.32
Water Absorption after 24 hrs immersion in water (%)
