Polypropylene homopolymer is a polymer of single propylene monomer, which is a homopolymer formed by polymerization of propylene monomer. It has good flow performance and a wide range of flow rate, and is easy to be processed and formed into films. It is applicable to plastic knitting industry, biaxial tensile film, BOPP film, straw and drinking water pipe, etc. However, the structure of homopolypropylene is relatively regular, and its impact performance is poor. Therefore, homopolypropylene is easy to embrittle, and is rarely used in heavy industrial packaging and household appliances.