Flame-retardant polypropylene composite material as well as preparation method and application thereof

The invention discloses a flame-retardant polypropylene composite material as well as a preparation method and application thereof. The composite material is prepared from the following raw materials: modified polypropylene and polypropylene functional master batch, wherein the modified polypropylene is prepared from the following raw materials: low-isotacticity polypropylene, long glass fibers, a compatilizer, an antioxidant I and a lubricant I; and the polypropylene functional master batch is prepared from the following raw materials: polypropylene powder, a halogen-free flame retardant, a flexibilizer, a light stabilizer, a laser engraving agent, an antioxidant II and a lubricant II. The flame-retardant polypropylene composite material prepared by the invention has the characteristics of high strength, high modulus, weather resistance, warping resistance, flame retardance, high glowing filament, laser marking capability and the like, and can be applied to preparation of plastic parts such as 5G radomes, au