| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polypropylene resin composition for providing sheet excellent in processability, transparency and rigidity.SOLUTION: There is provided a polypropylene resin composition containing a polypropylene single polymer which is obtained by polymerizing polypropylene using a catalyst containing (A) a solid catalyst containing magnesium, titanium, halogen and an electron donor compound as essential components, (B) an organic aluminum compound and (C) an organic silicon compound as an external electron donor compound, and has xylene insoluble matter of the polymer at 25°C of 95 to 98 wt.% and a multi dispersion index of 3.0 to 4.5, and a crystal nucleus agent, and having the melt flow rate of the composition at 230°C of 3.0 to 7.8 g/10 min., a plurality of a crystallization peaks in a crystallization curve obtained by cooling the composition at 100°C/sec. after melting, the crystallization top peak temperature in a maximum temperature side of 83°C or less and the crystallization top peak temperature in a minimum temperature side of 40°C or less.</p> |
