| 摘要 |
POLYPROPYLENE FOR FILM CAPACITOR, POLYPROPYLENE SHEET FOR FILM CAPACITOR, METHOD FOR PRODUCING THE SAME, AND USES OF THE SAME AbstractDisclosed are a polypropylene for a film capacitor and a polypropylene sheet for a film capacitor, each of which exhibits excellent stretchability when stretched into a film and is10 capable of providing a film that has high dielectric breakdown voltage and small thermal shrinkage. The polypropylene for a film capacitor and the polypropylene sheet for a film capacitor are suitable for a polypropylene film for a film capacitor and a film capacitor comprising the film- The polypropylene for a film capacitor is characterized by being obtained by irradiating apropylene homopolymer with radiation with an absorbed dose of 0.1-500 key, said propylene homopolymer having (1) a melt flow rahe (MFR) within a range of 1-10 g/10 minutes as determined at 230°C under a load of 2.16 kg in accordance with ASTM D1238, (2) an isotactic pentad fraction (mraram fraction) of not less than 94% as determined using 'C-NMR, (3) an ash content of not more than 30 ppm as obtained by being completely burnt in air, and (4) anchlorine amount of not more than 10 ppm as determined by ion chromatography.No suitable figure. |
