▎ 摘　　要

NOVELTY - Flame retardant nylon composite material comprises 78-82 pts. wt. nylon 66, 18-21 pts. wt. coumarone indene resin, 26-28 pts. wt. carbon fiber, 8.6-8.8 pts. wt. melamine cyanurate, 21-23 pts. wt. aluminum nitride, 8-10 pts. wt. graphene oxide, 3-5 pts. wt. liquid paraffin, 5-6 pts. wt. dibutyl sebacate, 8-9 pts. wt. aminosilanes, 1.6-1.9 pts. wt. nano-alumina, 0.2-0.4 pts. wt. nickel di-n-butyldithiocarbamate antioxidant, and 4-6 pts. wt. corn starch. USE - Flame retardant nylon composite material for electric power fitting (claimed). ADVANTAGE - The flame retardant nylon composite material has good curing resistance, good fluidity, high surface hardness and surface scratch resistance, and is suitable for mass production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing flame retardant nylon composite material, which involves: (A) adding the corn starch into 10-12 times of water, stirring uniformly, boiling, adding nano-alumina, and liquid paraffin, continuously stirring for 10-20 minutes, cooling to 45-55 degrees C, adding melamine cyanurate, performing ultrasonic dispersion for 20-30 minutes, and performing spray-drying to obtain the modified melamine cyanurate; (B) calcining aluminum nitride at 815-910 degrees C for 30-40 minutes, cooling to 120-130 degrees C, adding graphene oxide, and dibutyl sebacate, grinding for 20-30 minutes, cooling to 75-80 degrees C, adding aminosilane, performing ultrasonic dispersion for 10-15 minutes, and drying at room temperature to obtain the modified aluminum nitride; (C) putting the carbon fiber into 25-40 wt.% nitric acid solution, soaking at room temperature for 10-20 minutes, neutralizing with 5-20% sodium hydroxide solution, washing with water, and drying to obtain roughened carbon fiber; and (D) mixing nylon 66, coumarone indene resin, modified aluminum nitride, and modified melamine cyanurate uniformly, putting into the twin-screw extruder, adding roughened carbon fiber, performing melt extrusion, pelleting and then discharging to obtain the finished product.