SEMI-CONDUCTIVE SHIELDING MATERIAL FOR HIGH-VOLTAGE CABLE, AND PREPARATION METHOD THEREFOR

The present invention provides a semi-conductive shielding material for high-voltage cable, and a preparation method thereof. The semi-conductive shielding material for high-voltage cable includes 100 parts by weight of an ethylene butyl acrylate resin, 25 to 40 parts by weight of conductive carbon black, and 4 to 8 parts by weight of functional auxiliary agents. The conductive carbon black includes high oil absorption value (OAV) conductive carbon black with an OAV ranging from 300ml/100g to 400ml/100g and low OAV conductive carbon black with an OAV ranging from 120ml/100g to 220ml/100g. The weight ratio of the high OAV conductive carbon black to the low OAV conductive carbon black is 1:(2~4). The high-voltage cable semi-conductive shielding material of the present invention has excellent electrical conductivity, mechanical performances, and peeling adhesion. In addition, it also solves the issue of adverse effects on the formability and mechanical performances of the semi-conductive shielding material for high-voltage cable that arise from adding a substantial amount of conductivity carbon black to attain the predetermined conductivity.