Insulation tape for covering the connection part of the power cable, how to form the insulation coating on the outer surface of the connection part of the power cable, and the power cable

摘要

Even when polyethylene with high hydrophilicity is used, an insulating tape for covering the connection part of the power cable, which is unlikely to cause local cracking in the fused portion, an insulating coating forming method using this, and a power cable. provide. The insulating tape is made of a resin material containing polyethylene, which is at least partially modified by a molecule that imparts hydrophilicity, an antioxidant, and a cross-linking agent. The antioxidant has a molecular weight of 190 or more and less than 1050, and is oxidized. The content of the inhibitor is 0.05 parts by mass or more and 0.8 parts by mass or less with respect to 100 parts by mass of polyethylene, and the tape thickness is 50 μm or more and 250 μm or less. Further, in the power cable 1, at least the above-mentioned insulating tape is wound and crosslinked with respect to the connection portion 171 in which the exposed ends of the conductors 11a and 11b of the plurality of power cables are connected to each other by conductors and the outer periphery of the connection portion 171. A connection structure portion 17 having an insulating coating 173 formed on the outer surface of the connection portion 171 is provided.