PROTECTION OF ELECTRICAL AND ELECTRONIC EQUIPMENT AND PART AGAINST ELECTROSTATIC DISCHARGE

The technical requirement for ESD protection in clinical environment, equipment rooms, dispatch center and flammables, or explosives are stored or handled are very important for personnel and the electronic parts safety. Protection against electrostatic discharges (ESD) involves the technical requirements for floor that is very important to complete the protection program. Polymers usually used as antistatic control floor. Different polymer samples from nitrile butadiene rubber (NBR) have been prepared with different concentrations of carbon black (N660) to study the electrical properties for as antistatic floor application. The electrical properties have been measured for 8 samples through the effect of carbon black content (N660); (0,40,50,60,70,80,90,100) on the dc and ac electrical conductivity, Also the electrical resistance of conductive and dissipative samples was measured according to ASTM F150 and ANSI/ESD S7.1 .The results show that dc electrical conductivity (?dc) increases by increasing the carbon black concentration up to the threshold value (~ 60 phr) and changed from 109 S/m to106 S/m. The range of conductive resistance of samples N90 and N100 achieves the required limits in ANS/ESD S7.1-05 and ASTM F 150-98 when using conductive adhesive for floor. The range of dissipative resistance of all samples achieves the required limits in ANS/ESD S7.1-05 and ASTM F 150 -98 with and without conductive adhesive for floor. Finally the carbon black concentration improves the conductive and dissipative resistance properties that required for antistatic polymer floor.