Low-shrinkage impact-resistant co-polypropylene material and preparation method thereof

The invention provides a low-shrinkage anti-impact co-polypropylene material and a preparation method thereof, and particularly relates to a low-shrinkage anti-impact co-polypropylene material. The melt flow rate of the low-shrinkage impact-resistant polypropylene material is 20-40g/10min, the ethylene content is 5-11%, the rubber content is 14-19%, the impact strength of a simply supported beam notch is greater than 7KJ/m < 2 >, the bending modulus is greater than 900MPa, and the transverse shrinkage rate is lt. 1.0% and a longitudinal shrinkage rate lt; and 1.0%. The material has the advantages of lower shrinkage rate, favorable flowing property, favorable impact resistance, favorable bending property and favorable comprehensive properties, and can be directly used for large injection molding products such as automobiles, household products, toys, packages and the like without modification. The invention also discloses a preparation method of the polypropylene material. 本发明提供一种低收缩抗冲共聚聚丙烯材料及其制备方法，具体涉及一种低收缩抗冲