CRYSTALLINE POLYPROPYLENE AND ITS MOLDED PRODUCT AND FILM

摘要

PROBLEM TO BE SOLVED: To obtain a crystalline polypropylene excellent in rigidity and heat and scuff resistances and a molded product and a film prepared by molding the crystalline polypropylene. SOLUTION: This crystalline polypropylene has the soluble fractionα(wt.%) at 0 deg.C according to a temperature rising fractionating method and the molecular weight Mp at the peak position in a molecular weight distribution curve measured by using a gel permeation chromatography(GPC) satisfying the relationship or the formula:α<=-0.42×l n(Mp)+7.3 and the melting point Tm ( deg.C) measured by using a differential scanning calorimetric analyzer and the Mp satisfying the relationship of the formula: Tm>1.85×l n(Mp)+144.5. Furthermore, the molded product and film are prepared by molding the crystalline polypropylene.