Flame-retardant PBT composite material used for laser marking and having high glowing wire ignition temperature, and preparation method thereof

The invention relates to the technical field of polymer materials, and concretely relates to a flame-retardant PBT composite material used for laser marking and having a high glowing wire ignition temperature, and a preparation method thereof. The flame-retardant PBT composite material used for laser marking and having a high glowing wire ignition temperature comprises, by weight, 40-60 parts of PBT resin, 25-35 parts of glass fibers, 10-15 parts of a main flame retardant, 5-10 parts of a compounded synergistic flame retardant, 2-6 parts of a toughening agent, 0.5-1.0 part of laser marking powder, 0.1-0.2 parts of an antioxidant and 0.5-1.0 part of other assistants. The flame-retardant PBT composite material used for laser marking and having a high glowing wire ignition temperature can meet the high glowing wire ignition temperature, can also be used for laser marking, and also has the advantages of good flame retardation effect, excellent resistance to temperature and weather, high strength, excellent impact