ComPlex Plastics Inc.
PRODUCTS LIST & TECHNICAL DATA
PBI
PolyBenzImidazole Specifications
PBI is a high performance imidized thermoplastic. Chemically, PBI is PolyBenzamIdazole.
PBI is the highest performing engineering plastic currently available. It offers the highest heat resistance (it does not melt) and mechanical property retention over 400°F (205°C) of any unfilled plastic. It has better wear resistance and load carrying capabilities at extreme temperatures than any other reinforced or unreinforced engineering plastic.
As an unreinforced material, PBI is very clean in terms of ionic impurity and it does not outgas (except water). These characteristics make this material very attractive to semiconductor manufacturers for vacuum chamber applications. PBI has excellent ultrasonic transparency which makes it an ideal choice for parts such as probe tip lenses in ultrasonic measuring equipment.
PBI is also an excellent thermal insulator. Other plastics in melt do not stick to PBI. These characteristics make it ideal for contact seals and insulator bushings in plastic production and molding equipment.
NOTE:
PBI is also available in powder, pellet, filament and solution
forms for compression molding, casting, and R & D purposes.
TYPICAL APPLICATIONS
• Wafer retaining rings for gas plasma etching • Vacuum tips • Wafer carriers • Contact seals • Insulator bushings • Thermal isolators • Guide rollers
TYPICAL PROPERTIES of PBI
ASTM or UL test Property PBI PHYSICAL D792 Density (lb/in³)
(g/cm³)0.047
1.30D570 Water Absorption, 24 hrs (%) 0.40 MECHANICAL D638 Tensile Strength (psi) 23,000 D638 Tensile Modulus (psi) 850,000 D638 Tensile Elongation at Break (%) 3.0 D790 Flexural Strength (psi) 32,000 D790 Flexural Modulus (psi) 950,000 D695 Compressive Strength (psi) 50,000 D695 Compressive Modulus (psi) 900,000 D785 Hardness, Rockwell E105 D256 IZOD Notched Impact (ft-lb/in) 0.5 THERMAL D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)1.3 D648 Heat Deflection Temp (°F / °C)
at 264 psi
800 / 427D3418 Glass Transition Temp (°F / °C) 750 / 399 - Max Operating Temp (°F / °C) 650 / 343 C177 Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C)
2.80
9.64UL94 Flammability Rating V-O ELECTRICAL D149 Dielectric Strength (V/mil) short time, 1/8" thick 550 D150 Dielectric Constant at 1 MHz 4.20 D150 Dissipation Factor at 1 MHz - D257 Volume Resistivity (ohm-cm)at 50% RH >1013 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. All values at 73°F (23°C) unless otherwise noted.
PRODUCTS LIST & TECHNICAL DATA
WAREHOUSES IN MAJOR CITIES
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