EXPERIMENTAL INVESTIGATION IN ZINC BORATE EFFECT ON FLAMMABILITY CHARACTERISTICS OF POLYMERIC COMPOSITE MATERIAL

The main aim of this paper is to investigate flammability enhancement of araldite composite material reinforced by kevlar-carbon fibers by addition of a surface coating layer (4mm) thick from zinc borate. This system was exposed to a direct flame generated from oxyacetylene flame and gas flame under different exposure intervals (10,15, and 20mm), and study the range of resistance of flame retardant material layer to the flames and protected the substrate where we used the method of measuring the surface temperature opposite to the flame where we obtained the better results with large exposed interval and large percentage from protective layer which is zinc borate (30%) for both types of flames , as well as the flame resistance will be increased with decrease the flame temperature .