▎ 摘　　要

NOVELTY - Polyphthalamide composite material comprises 20-40 pts. wt. polyphthalamide resin, 1-5 pts. wt. glass fiber, 10-18 pts. wt. halogen free flame retardant, 1-5 pts. wt. coupling agent, 1-3 pts. wt. antioxidant, 0.5-1.5 pts. wt. heat stabilizers, 1-3 pts. wt. nano silica, 1-5 pts. wt. nucleating agent and 1-5 pts. wt. toughening modifier. USE - Polyphthalamide composite material used for automotive industry, higher performance motors, automotive headlamp reflectors, bearing housings, pulleys, sensor housings, fuel line components and electrical components. ADVANTAGE - High-temperature-resistant halogen-free flame-retardant polyphthalamide (PPA) composite material has excellent heat resistance and good flame retardance, the flame retardance level reaches UL940.8mm V0, the PPA composite material not bubble through reflow soldering at 250 degrees Celsius, and meanwhile, the PPA composite material has the characteristics of rapid forming, high cost performance and the like, and the application field of PPA resin is greatly expanded. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of polyphthalamide (PPA) composite material involves mixing halogen-free flame retardant, PPA resin, coupling agent, nano-silica and nucleating agent and stirring evenly, adding to a drying device, heating to 65-85 degreesC and vacuum drying, cooling to room temperature to obtain mixture A with a moisture content of less than 0.1%, ready for use. Adding antioxidant, heat stabilizer and toughening modifier to obtain mixture A, adding it to a high-speed stirring device and continue stirring for 20-60 minutes at 5000-9000 revolutions per minute until uniform to obtain mixture B. Adding the mixture B into the extrusion equipment from the main feeding port, and at the same time adding the glass fiber into the extrusion equipment from the side feeding port, and carry out mixing, extrusion and granulation. PPA composite material during granulation, the temperature of the first zone of the twin-screw extrusion device is 240-260 degreesC, the temperature of the second zone is 240-250 degreesC, the temperature of the third zone is 230-250 degreesC, and the temperature of the fourth zone is 220-240 degreesC, screw speed is 250-350 revolutions per minute, and the drying temperature is 70-100 degrees Celsius.