| 摘要 |
A shaped product made of polypropylene, whereof 2.0 to 90% by weight is soluble and 91 to 98% is insoluble in boiling heptane, and of the insoluble portion at least 0.955 (as measured by <1><3>C nuclear magnetic resonance spectrography, wherein the area of a mmmm peak is measured as a fraction of the total area of the absorption peaks in the methyl carbon region) of the polymer is of isotactic pentad structure. …<??>This product has high film stiffness and resistance to electrically insulating oils and to heat. …<??>The product can be a stretched film or insulating material for electrical equipment. |
