Low-shrinkage, low-warpage and soft-tactility polypropylene composite material used for automotive interior decoration and preparation method of polypropylene composite material

The invention relates to a low-shrinkage, low-warpage and soft-tactility polypropylene composite material used for automotive interior decoration and a preparation method of the polypropylene composite material. The materials is prepared from, by weight, 40-60 parts of polypropylene, 20-25 parts of elastomers, 10-30 parts of glass fibers, 5-10 parts of inorganic filler, 1-3 parts of compatibilizer, 0-5 parts of fluff powder, 0.2-0.4 part of antioxidant, 0.2-0.5 part of light stabilizer and 0-3 parts of other auxiliaries. By selecting polypropylene, the elastomers, fluff powder and other materials in suitable matching ratio, through one-time injection, the product is soft in touch feeling, low in gloss, excellent in impact resistance, excellent in scratch resistance and low in shrinkage and warpage, and can be widely used in the field of automotive interior decoration. The prepared soft-tactility polypropylene composite material has the advantages of being simple in process and low in cost, is suitable for industrial continuous production and has a great application and development prospect.