POLYPROPYLENE RESIN COMPOSITION AND PRODUCTION METHOD THEREOF, BIAXIALLY STRETCHED FILM AND PRODUCTION METHOD THEREOF, AND CAPACITOR FILM FOR FILM CAPACITOR
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United States of America Patent
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Mar 30, 2016
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Mar 31, 2015
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Provided is a polypropylene resin composition which is good in extrusion property, which is good in appearance and low in variation in thickness when formed into a film, which is well-balanced in dynamic characteristics, and which has high heat resistance. A polypropylene resin composition satisfying the following requirements (1) to (3): (1) a melt flow rate (MFR) measured under a load of 2.16 kg at 230° C. according to ASTM D1238 is 1 to 10 g/10 min; (2) a pentad isotactic fraction measured using 13C-NMR is 0.930 or more; and (3) Mz is 600000 to 1400000, and Mw/Mn is 6.5 to 14.0.
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