Flame-retardant black laser-etched PC composite material and preparation method thereof

The invention discloses a flame-retardant black laser-etched PC composite material and a preparation method thereof. The flame-retardant black laser etching PC composite material is prepared from the following raw materials in parts by mass: 80 to 90 parts of polycarbonate, 2 to 8 parts of a toughening agent, 3 to 9 parts of a brominated flame retardant, 1 to 7 parts of a nitrogen-based flame retardant, 0.2 to 0.3 part of an anti-dripping agent, 0.2 to 0.5 part of a laser etching agent and 0.03 to 2 parts of a laser etching coloring agent. The bromine-silicon-nitrogen composite flame-retardant system is used for improving the flame retardance and the CTI value of the PC material, meanwhile, the laser etching agent with the low adding amount is used for replacing black master batch, so that the black flame-retardant PC has the higher CTI value and the excellent laser etching performance, and therefore the PC material meeting the high flame retardance, the high CTI, the high impact and the excellent laser etchi