By adding the inorganic flame retardant association effect, examines the different kinds and dosage of magnesium hydroxide, antimony sodium acid and zinc borate of Nylon6 composite mechanical properties and the influence of flame retardant performance, and the flame retardant mechanism were discussed. Added respectively in the test results show that Nylon6 composite magnesium hydroxide, sodium antimonate and zinc borate, bibulous rate is lower, but reduce are less obvious. Further improve the tensile strength, shows that the three kinds of inorganic filler on Nylon6 composite material has a certain enhancement effect. Melt index is slightly lower, oxygen index increased significantly.

Adding inorganic flame retardant type magnesium hydroxide is the best mechanical properties, and the flame retardant performance, best can achieve V - level 0, and smoothly passed the glow wire test. Adding inorganic flame retardant magnesium hydroxide best, mechanical properties and flame retardant performance, best can achieve V - level 0, and smoothly passed the glow wire test. Nylon6 is failed to pass the 550 ℃ hot wire; Only adding inorganic flame retardant without hydrogenation of magnesium oxide Nylon6 composite material glow wire test only through 550 ℃ and 650 ℃ performance test; While the effect after flame retardant magnesium hydroxide, with the increase of dosage, through the glow wire test the level of increase, add 4 wt % magnesium hydroxide, the glow wire test can through 550 ℃, 650 ℃, 750 ℃, 850 ℃ performance test, add 6 or 8 wt % wt % after magnesium hydroxide, can pass the temperature of the glow wire test.

SEM test results show that when there is no synergistic flame retardant magnesium hydroxide added, in the density of Nylon6 substrate surface is not easy to form carbon layer, and when the synergistic flame retardant magnesium hydroxide are added, flame retardant Nylon6 in the process of combustion can be formed on the surface of the matrix, the density of carbon layer.