Molded products of polypropylene
AssigneeSumitomo Chemical Company, Limited
InventorsAkinobu Shiga, Kiyoshi Matsuyama, Masahiro Kakugo, Yukio Naito, Seiichiro Ima
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Abstract
A molded product of polypropylene having an isotactic pentad fraction of the boiling heptane insoluble portion of at least about 0.955 and a boiling heptane solubles content of about 2.0 to 9.0% by weight. The molded products include a stretched film, insulating materials for electrical equipment, etc.
Claims21
A stretched film, for use in electrical insulation, prepared from a polypropylene having an isotactic pentad fraction of the boiling heptane insoluble portion of at least about 0.955 and a content of the boiling heptane soluble portion of about 2.0 to 9.0% by weight.
The stretched film of claim 9, wherein MFR is about 0.5 to 50.
A laminated paper, for use in electrical insulation, produced by laminating a polypropylene, having an isotactic pentad fraction of the boiling heptane insoluble portion of at least about 0.955 and a content of the boiling heptane solution portion of about 2.0 to 9% by weight, on a fibrous paper.
Dependencies are inferred from the claim text.