One of the key technologies of composite insulators is the bonding between the core rod and sheath. This paper explores the use of chlorinated polypropylene-based adhesives to bond a polyolefin sheath material and an epoxy core rod. Dye penetration tests, bonding strength tests and water diffusion tests were carried out to evaluate the adhesiveness. The results demonstrated that the sample bonded by the chlorinated polypropylene/γ-methacryloxypropyltrimethoxysilane adhesive had the best interface tightness, and the bonding strength reached 7.34 MPa. Furthermore, the leakage current was as low as 41 μA after the sample was placed in boiling water for 100 h. This work provides a key bonding technology for polyolefin materials used as composite insulator sheaths.

复合绝缘子的关键技术之一是芯棒与护套的粘接。本文探讨了使用氯化聚丙烯基粘合剂粘合聚烯烃护套材料和环氧芯棒。进行染料渗透试验、粘合强度试验和水扩散试验以评价粘合性。结果表明，氯化聚丙烯/γ-甲基丙烯酰氧基丙基三甲氧基硅烷胶粘剂粘接的试样界面紧密度最好，粘接强度达到7.34 MPa。此外，将样品放入沸水中 100 小时后，漏电流低至 41 μA。这项工作为用作复合绝缘子护套的聚烯烃材料提供了关键的粘合技术。