PBI Unfilled


What is the Material: PBI Unfilled is an amorphous imidized materials.

Key Material Features: This material is beneficial in applications requiring wear resistance, strength, and it maintains properties in extreme temperatures. It is the hardest and highest performing unfilled thermoplastic.

Other Considerations: It holds up in extreme temperatures better than other thermoplastics including PEEK, PAI, and PI. Other plastics do not stick to PBI when melted. This material is attacked by hot water and steam.


Property Value Typical ASTM Test
Chemical Designation (PBI) Polybenzimidazole
Trade Names (®, ™) Duratron PBI
Color Black
Density (g/cm^3) 1.30 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 850000 D 638
Tensile Strength at Yield (psi) 16000 D 638
Elongation at Break (%) 2 D 638
Flexural Strength (psi) 32000 D 790
Modulus of Elasticity (Flexural Test) (psi) 950000 D 790
Compression Strength: 10% Strain (psi) 50000 D 695
Compression Modulus (psi) 900000 D 695
Impact Strength (Izod) (ft-lbs/in) 0.5 D 256
Hardness (D) 94 D 785
Hardness (E) 105
Hardness (M) 125 D 785
Coefficient of Friction (Kinetic, 40 psi, 50 fpm) 0.24 D 3702
Wear (K) Factor (in^3-min/ft-lbs-hr) (Against Steel, 40 psi, 50 fpm) 6.00E-9 D 3702


Property Value Typical ASTM Test
Glass Transistion Temperature (°F) 775 D 3418
Deflection Temperature (°F) (264 psi) 800 D 648
Service Temperature Continuous (°F) 600
Thermal Expansion (CLTE) (in/in/°F) 1.30E-5 D 696
Thermal Conductivity (BTU-in/hr-ft^2-°F) 2.80


Property Value Typical ASTM Test
Specific Surface Resistance (Ω/square) 1.00E13 D 257
Dielectric Strength (V/mil) 550 D 149
Dissipation Factor (1MHz) 0.0030 D 150
Dielectric Constant (1MHz) 3.2 D 150


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.4 D 570
Moisture Absorption (%) (Saturated) 5 D 570
Flammability V-0
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.