TERNARY COMPOSITION FOR CABLE INSULATION LAYER, PREPARATION METHOD THEREFOR, AND CABLE INSULATION LAYER AND POWER CABLE WHICH COMPRISE SAME

摘要

The present invention relates to a ternary composition for a cable insulation layer, a preparation method, and a cable insulation layer and a power cable which comprise same, and, more specifically, to: a ternary composition for a cable insulation layer, in which a polypropylene, an elastomer and an ethylene-propylene copolymer are used so that flexibility, heat resistance and mechanical and electrical properties can be improved; a preparation method; and a cable insulation layer and a power cable which comprise same. The present invention relates to a ternary composition for a cable insulation layer, a preparation method, and a cable insulation layer and a power cable which comprise same, the ternary composition comprising: a polypropylene matrix; elastic cores made of elastomers, and dispersed in the polypropylene matrix; and copolymer shells made of ethylene-propylene copolymers, and formed to encompass the outside of the elastic cores.