Due to its own performance advantages and environmental protection value

fiber-reinforced PA66 composite material has been applied in insulating parts of medium-voltage switching equipment in recent years.However

compared with epoxy insulating material

it still has a large performance distance.Based on the performance requirements of the medium-voltage switch equipment

we use the high-performance aromatic PA6T6I as the modified material to study the performances of the different mix ratio formula of PA66 and PA6T6I is 3:7

5:5 and 7:3.The modification formula with the pure PA66 and epoxy basic physical properties are compared by testing their mechanical and electrical properties

long-term electric-heat aging property and creep characteristic.The results show that the formula with a mixing ratio of 5:5 has better comprehensive performance and will be an ideal alternative insulation m aterial.