High-flowability polyamide based halogen-free flame-retardant heat-conducting composite material and preparation method thereof

The invention discloses a high-flowability polyamide halogen-free flame-retardant heat-conducting composite material and a preparation method thereof. A novel halogen-free flame-retardant heat-conducting composite material is prepared by using high-flowability nylon 6 resin with a branch chain structure as a base body, adding additives such as heat-conducting fillers, a halogen-free flame retardant, an antioxidant and a coupler, and preparing the material through a double-screw melt blending technology. The halogen-free flame-retardant heat-conducting composite material has the characteristics of good heat conductivity, high melt flowability, good environment-friendly and flame-retardant performances, excellent insulation and mechanical comprehensive performances and the like; an obtained product is high in heat-radiating speed, high in strength, low in warping degree and resistant to high temperature and ageing; the composite material can be widely applied to the field of electric plastic parts with higher heat-radiating requirements such as locomotive compartment illumination lamp covers, auto and civil LED heat radiators, household appliance motor shells, notebook power, micro-projector shells, transformer coil frameworks and the like.