PBI (POLYBENZIMIDAZOLE)
CELAZOLE®

SPECIFICATIONS:
   NONE

NATURAL COLOUR:
  BLACK (in ROD and TUBE)

PBI is something fantastic in the polymer field. Temperatures, in air of 800°F with short bursts to 1400°F are within its capability! PBI will not melt or burn and at no temperature will PBI produce a brittle char. Flames, laser energy, intense radiation and aerodynamic ablation can all be handled by this product. At the other end, PBI maintains its properties to -320°F. PBI is the hardest of any virgin polymer: even harder than Melamine! As well, PBI outperforms all other commercially available polymers in saturated steam environments. This material is almost unaffected by acids, weak bases and solvents. Products such as firefighters equipment, fire blocking layers in aircraft and space suits have been made from PBI fibres since the early 1980's. Now with standard shape stock available, items such as nose cones; valves and seals for severe chemical environments at high temperature; next generation electronic connectors and switches operating in extreme conditions; "down-the-hole" parts able to withstand the heat, pressure and hostile environment of oil wells; can all be manufactured to successfully perform where many other materials have failed. PBI machines well using a broad range of coolants to produce fine finishes and close tolerance parts. PBI is notch sensitive and parts should be designed accordingly.

GENERAL PROPERTIES
  ASTM
test
Unfilled Grade
SPECIFIC GRAVITY   D792 1.38
TENSILE STRENGTH psi D638 23000
TENSILE MODULUS 105 psi D638 8.5
ELONGATION % D638 3.0
FLEXURAL STRENGTH psi D790 32000
FLEXURAL MODULUS 105 psi D790 9.5
COMPRESSIVE STRENGTH 10% psi D695 50000
COMPRESSIVE MODULUS 105 psi D695 8.5
HARDNESS rockwell M D785 >M125
  shore D E104 95D
IMPACT STRENGTH (1/2" x 1/2") ft-lb/inch of notch D256 0.5
THERMAL EXPANSION 10-5/°F D696 1.3
HEAT RESISTANCE (continuous in air) °F   8000
DEFLECTION TEMPERATURE   D648  
@ 264 psi °F   8.15
@ 66 psi °F   N/A
DIELECTRIC STRENGTH v/mil D149 543
DIELECTRIC CONSTANT   D150 3.2 to 3.3
DISSIPATION FACTOR 10-3 D150 3 to 34
WATER ABSORPTION 24hrs % D570 0.40
FLAMMABILITY in/min D635 <0.02
BEARING PROPERTIES
WEAR FACTOR, 'K' 10-10-in3-min
ft-lb-hr
D3702 29
COEFFICIENT of FRICTION (DRY)      
against self - static 40 psi    
against self - dynamic 40 psi/50fpm    
against steel - static 40 psi   0.27
againist steel - dynamic 40 psi/50fpm   0.18
LIMITING PV lb-ft/in2-min @10fpm  
    @40fpm 50000
    @100fpm  
    @400fpm  
    @1000fpm  

PLEASE NOTE:
Values shown in the above table are averages and there will be variances from lot to lot. After selecting a material based upon these values, you must conduct tests specific to your application to be assured the material suits your needs.