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AssigneesMitsubishi Cable Industries, Ltd., Mitsui Toatsu Chemicals, Inc.
InventorsMasaki Kawahigashi, Hiroshi Kato, Ryuichi Sugimoto, Nobutaka Uchikawa, Katsumi Yoshino
Estimating the term…
An insulating composition comprising a syndiotactic polypropylene (s-PP) having a syndiotactic pentad ratio of not less than 0.7 and an MFR of 0.05-2.0 g/10 min. The composition of the present invention comprising a specific s-PP can provide an article having superior electric properties and mechanical properties. In particular, the article can retain superior electric properties and mechanical properties even after rapid cooling or gradual cooling for re-processing of said article. Accordingly, the composition of the present invention can be suitable used for insulating layer, coating layer of various power cables inclusive of high voltage wires and low voltage wires, coating layer of optical fibers and insulator of wire-connecting structures.
An insulating layer of power cables formed from a composition comprising a syndiotactic polypropylene having a syndiotactic pentad ratio of not less than 0.7 and a melt flow rate of 0.1-20 g/10 min.
A foamed insulator of a communication cable comprising a syndiotactic polypropylene having syndiotactic pentad ratio of not less than 0.7 and a melt flow rate of 0.1-20 g/10 min.
A sheath or a jacket of a power cable formed from a composition comprising a syndiotactic polypropylene having a syndiotactic pentad ratio of not less than 0.7 and a melt flow rate of 0.05-20 g/10 min, and at least one member selected from carbon black and pigments.
Dependencies are inferred from the claim text.