Polypropylene film capacitor, biaxially oriented film are used for thin film capacitor, thin film capacitor and these manufacturing method

摘要

It is an object of the invention to, there is provided a kind of polypropylene (step F) has excellent draftability and Uniform Tension for thin film capacitor, biaxially oriented film which preferably by small a thermal contraction ratio and enough breakdown voltages, even if there is high temperature and high-frequency current in the presence of a harsh environment and thin film capacitor includes biaxial stretching film. Polypropylene (step F), the invention also includes a kind of Noblens and one kind, and there is alpha-crystal nucleating agent fusing point to be no more than 290 °C, and wherein Noblen meets. (1) MFR (7210,230 °C of JIS K, load 2.16 grams) in 1 to 10 (g/10 minutes); The parts mmmm (2) are not less than 93%; (3) ratio2,1erythro portion defect is less than 0.1% mole of %, measurement use 13C-NMR; (4) ash amount is no more than 50, and obtained Noblen burns completely in the sky; (5) chlorine dose is no more than 5, such as passes through the chromatography of ions; (6) molecular weight distribution mw/mn is 6.5 to 12, such as pass through GPC.