Alkali-free glass fiber reinforcing modified polypropylene composite material and preparing method thereof

The invention relates to an alkali-free glass fiber reinforcing modified polypropylene composite material and a preparing method thereof. The alkali-free glass fiber reinforcing modified polypropylene composite material comprises, by mass, 45-55 parts of homopolymerized PP resin, 28-32 parts of alkali-free glass fibers, 13-17 parts of talcum powder, 4-6 parts of compatilizer, 0.5-2 parts of antioxidant, 0.5-2 parts of anti-fiber-floating agent and 0.5-2 parts of lubricating agent. The alkali-free glass fiber reinforcing modified polypropylene composite material has the advantages that the superfine talcum powder is added into a PP glass fiber reinforcement material for replacement, the talcum powder with the length-diameter ratio smaller than that of the glass fibers is used, the large-particle lubricating dispersion effect can be achieved in the mixture of the formula, the alkali-free glass fibers with the large length-diameter ratio can be better and evenly dispersed in the material accordingly, the surface bright-clean performance and the processing fluidity of a nylon composition can be effectively improved, and therefore a product with the bright and clean surface can be better processed.