With the content of 5%wt ultrafine calcium carbonate, tensile strength of PP is 33.68MPa, tensile modulus is 1.38GPa, izod impact strength is 9,38KJ/m2.

• 超细碳酸钙改性聚丙烯时，在5%25wt左右力学性能达到最佳，拉伸强度可以达到33.；68MPa，弹性模量可以达到1