| 摘要 |
A sealing tape 10 for a cold-applied joint in a pair of cables where at least one of the cables is a paper-insulated lead cable (PILC) including paper insulation impregnated with oil. The sealing tape 10 comprises in inner layer 12 carried on an outer layer 14. The inner layer 12 includes a deformable oil barrier material such that the first layer forms a seal about a joint, the seal being resistant to chemical attack from oil and resistant to migration of oil therethrough. The outer layer 14 includes a relatively rigid material forming a protective sleeve about the seal, the second layer forming a protective sleeve resists deformation and expansion of the inner layer 12 that results from expansion of oil in the paper insulation. The outer layer is preferably an elastic tape, e.g. elastomer based material such as a thermoplastic vulcanisate rubber, alternatively the outer layer may be a fabric reinforced pre-stretched tape coated in an elastomer such as silicone rubber to enable the external layer to resist deformation. The internal layer may be a form of sealing mastic material based on an oil resistant elastomer such as epichlorhydrin, nitrile and flurosilicone. No heating tool is required to form the seal. |
