| 摘要 |
PURPOSE:A mixture for insulated cable semiconductive layers which can be crosslinked at high temperatures without detriment to releasability in the production of cables, obtained by mixing a polyamide resin comprising a dimer acid with an ethylene copolymer, an epoxy resin, and electroconductive carbon. CONSTITUTION:A base polymer is prepared by mixing a polyamide resin obtained by polycondensing a dibasic acid component based on the dimer acid of the formula with a diamine with an ethylene/vinyl acetate copolymer and/or an ethylene/acrylate ester copolymer. This base polymer is mixed with an epoxy resin and electroconductive carbon black (e.g., acetylene black) to obtain the purpose mixture of semiconductive layers. When this mixture is used as a material for external semiconductive layers of crosslinked polyolefin insulated cables, these cables can be subjected to corsslinking treatment at a temperature >=about 300 deg.C without detriment to releasability. |
