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Nylon Sheets
$1.11
PEI / ULTEM Sheet
$5.44 - $9,143.40
PEI Sheets from Ready Plastics combine high strength, stiffness, and thermal stability with superior flame resistance and electrical insulation. Commonly used in electrical housings, semiconductor fixtures, and structural components requiring consistent performance at elevated temperatures.
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Technical Specifications for PEI/Ultem
Polyetherimide (PEI), known by the trade name Ultem™, is a high-performance amorphous thermoplastic recognized for its exceptional strength, heat resistance, and dimensional stability. It maintains rigidity and electrical insulation in demanding environments, offering excellent flame resistance and consistent performance in aerospace, automotive, and electrical applications.
Tensile Strength: ~105–110 MPa
Flexural Strength: ~160 MPa
Tensile Modulus (Elastic Modulus): ~3.2–3.4 GPa
Elongation at Break: ~30–60% (depends on grade)
Impact Strength (Notched Izod): ~6–8 kJ/m²
Hardness: Rockwell M110
Melting Point: Amorphous (no distinct melt)
Glass Transition Temperature (Tg): ~217°C (423°F)
Heat Deflection Temperature (HDT): ~200–210°C at 1.8 MPa
Continuous Use Temperature: ~170–180°C
Thermal Conductivity: ~0.22 W/m·K
Coefficient of Thermal Expansion: ~55 × 10⁻⁶ /°C
Dielectric Strength: ~15–20 kV/mm
Volume Resistivity: ~10¹⁷ Ω·cm
Dielectric Constant (1 MHz): ~3.1–3.2
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