INCREASING FLAMMABILITY RESISTANCE FOR AIRCRAFTS TIRES BY USING MAGNESIUM HYDROXIDE

Aircraft tire must withstand and a wide range of operational conditions .When on the ground, it must support the weight of the aircraft. During taxi, it must provide a stable cushioned ride while resisting heat generation, abrasion and wear. When aircraft down ,the tire may be fired because high friction with ground. So to protect aircrafts tires from fires Magnesium hydroxide was used in various quantities (10%,20%,30%) as a flame retardant to enhancement flame retardancy for tires material. Magnesium hydroxide was added with master batch of tire and then exposed the resulting material to a direct flame generated from gas flame (2000ºC) with flame exposure distance (10 mm), and study the range of tire resistance to the flame and the range protected of hydroxide addition . Method of measuring the surface temperature opposite to the flame was used to determine the heat transferred through tire material. The results was obtained from thermal erosion test shows improved flammability resistance for tire by added magnesium hydroxide and this resistance increased by increasing hydroxide percentage .