Semi-conductive composition for cable and method for preparing the same

Abstract

The present invention discloses a semiconductive composition for a cable, including: (a) a polyolefin resin including one or more functional groups selected from the group consisting of maleimide-based and allyl ester-based functional groups; and (b) a carbon-based material including one or more selected from the group consisting of carbon black and carbon nanotubes. According to the present invention, space charge characteristics are improved, thereby resolving issues such as electric field distortion and long-term insulation lifetime degradation. The semiconductive composition exhibits excellent mechanical properties and processability, improved crosslinking properties and scorch stability, as well as superior high-temperature volume resistivity, electrical properties capable of withstanding high direct current voltage, and surface smoothness. In addition, the semiconductive composition suppresses space charge in direct current power cables to ensure long-term reliability and enables long-distance power transmission.

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