Material Data Sheet
Material: CELAZOLE® PBI
PolybenzimidazoleCelazole® PBI has the best mechanical properties to 800°F and also provides the highest mechanical properties of any plastic above 400°F. Celazole® provides the highest heat deflection temperature of 800°F, with a continuous service capability of 750°F in inert environments. It also has the lowest coefficient of thermal expansion an highest compressive strength of all unfilled plastics. This material has proven itself in the semiconductor industry and also works excellent as a thermal insulator. However the machining of this material is very difficult and costly. Please contact Tamshell with any questions that you may have.
| Mechanical Properties | Test Method ASTM | Value | Units |
| Specific Gravity, 73°F | D792 | 1.3 | |
| Tensile Strength, 73°F | D638 | 20,000 | psi |
| Tensile Modulus of Elasticity, °F | D638 | 850,000 | psi |
| Tensile Elongation ( at break), 73°F | D638 | 3 | % |
| Flexural Strength, 73°F | D790 | 32,000 | psi |
| Flexural Modulus of Elasticity, 73°F | D790 | 950,000 | psi |
| Shear Strength, 73°F | D732 | psi | |
| Compressive Strength, 10% Deformation, 73°F | D695 | 50,000 | psi |
| Compressive Modulus of Elasticity, 73°F | D695 | 900,000 | psi |
| Hardness, Rockwell, Scale as noted, 73°F | D785 | E105 (M125) | |
| Hardness, Durometer, Shore "D" Scale, 73°F | D2240 | D94 | |
| Izod Impact (notched), 73°F | D256 Type A | 0.5 | ft-lb/in of notch |
| Coefficient of Friction (Dry vs. Steel) Dynamic | QTM 55007 | 0.24 | |
| Limiting PV (with 4:1 safety factor applied) | QTM 55007 | 37,500 | ft.lbs./in.2 min |
| Wear Factor "k" x 10-10 | QTM 55010 | 60 | in.3-min/ft.lbs.hr |
| Thermal Properties | |||
| Coefficient of Linear Thermal Expansion (-40°F to 300°F) | E-831 (TMA) | 1.3 x 10-5 | in/in./°F |
| Heat Deflection Temperature 264 psi | D648 | 800 (DMA) | °F |
| TG-Glass transition (amorphous) | D3418 | 750 (DMA) | °F |
| Melting Point (Crystalline) peak | D3418 | N/A | °F |
| Continuous Service Temperature in Air (Max.) (1) | 600 | °F | |
| Thermal Conductivity | F433 | 2.8 | BTU-in/hr-ft²-°F |
| Electrical Properties | |||
| Dielectric Strength, Short Term | D149 | 550 | Volts/mil |
| Surface Resistivity | EOS/ESD S11.11 | >1013 | ohm/square |
| Dielectric Constant, 106 Hz | D150 | 3.2 | |
| Dissipation Factor, 106 Hz | D150 | 0 | |
| Flammability @ 3.1 mm (1/8 in.) | UL 94 | V-0 | |
| FDA Compliant | No | ||
| *The values shown in these and the following charts are typical, average properties. Actual values may differ due to variations in resin formulations and processing methods. These values are obtained from sources believed to be reliable, including the resin manufactures, converters and other published sources. However, they should not be used for specification or design purposes. |
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