A flame-retardant coupling agent-synergized glass fiber-reinforced halogen-free flame-retardant polyamide composite material and its preparation method are also disclosed. The raw materials include: 30-50 parts of polyamide resin; 0.3-4 parts of flame-retardant silane coupling agent; 20-60 parts of glass fiber; 10-18 parts of halogen-free flame retardant; 0.5-5 parts of flame retardant synergist; 2-8 parts of plasticizer; 0.2-0.5 parts of chain extender; 0.2-1 part of antioxidant; and 0.3-0.8 parts of lubricant. The preparation method includes: first, pulverizing the halogen-free flame retardant, synergistic flame retardant, chain extender, lubricant, and antioxidant to form an additive package; adding the polyamide resin to a high-speed mixer, uniformly adding the plasticizer, then adding the flame-retardant silane coupling agent for low-speed mixing, and then adding the mixed additive package for high-speed mixing to obtain the mixed material; adding the material through the main feeding port into a twin-screw extruder, adding glass fiber through the side feeding port, and extruding and granulating to obtain the composite material of the present invention with excellent comprehensive performance.
Country Code: CN
Application Number: CN202311803391.6
