发明名称 |
POLYPROPYLENE FOR FILM CAPACITOR, POLYPROPYLENE SHEET FOR FILM CAPACITOR, METHODS FOR PRODUCING SAME, AND USES OF SAME |
摘要 |
A polypropylene for a film capacitor or a polypropylene sheet for a film capacitor which exhibits excellent stretchability when stretched into a film and provides a film having high breakdown voltage and small thermal shrinkage ratio, and which is suitable for a polypropylene film for a film capacitor and a film capacitor comprising the film. The polypropylene for a film capacitor of the present invention is obtained by irradiating a propylene homopolymer with a radiation with an absorbed dose of 0.1 to 500 kGy, the propylene homopolymer having (1) a melt flow rate (MFR) within a range of 1 to 10 g/10 min as determined at 230°C under a load of 2.16 kg in accordance with ASTM D1238, (2) an isotactic pentad fraction (mmmm fraction) of not less than 94% as determined using 13 C-NMR, (3) an ash amount of not more than 30 ppm as obtained by completely burning the propylene homopolymer in air, and (4) a chlorine amount of not more than 10 ppm as determined by ion chromatography. |
申请公布号 |
EP2410539(A1) |
申请公布日期 |
2012.01.25 |
申请号 |
EP20100753544 |
申请日期 |
2010.03.17 |
申请人 |
PRIME POLYMER CO., LTD. |
发明人 |
TAN, NORIKO;TAMURA, SATOSHI |
分类号 |
H01G4/18;C08L23/12 |
主分类号 |
H01G4/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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