| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polypropylene resin composition that hardly generates resin deposit on a die lip during forming a film and can provide a polypropylene film having little fisheye defects, good transparency and excellent scratch resistance. <P>SOLUTION: The polypropylene resin composition comprises: polypropylene resin particles (component (A)) having an average particle diameter of 600 to 1,500 μm; and with respect to 100 parts by weight of the component (A), 1 to 10 parts by weight of a spherical silica fine powder (component (D)) having a sphericity of 1.0 to 1.5, which is expressed by formula (1):sphericity=π×(maximum length of fine powder particle/2)<SP POS="POST">2</SP>/(cross-sectional area of the fine powder particle), an average particle diameter of 1.0 to 4.0 μm measured with a Coulter counter, a specific surface area of 260 to 1,000 m<SP POS="POST">2</SP>/g, an oil absorption amount of 100 to 400 ml/100 g and a pore volume of 0.5 to 1.4 ml/g. <P>COPYRIGHT: (C)2013,JPO&INPIT |
