| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce production cost by decreasing repeated heating and cooling procedures. SOLUTION: An internal lump part 12 to constitute an internal semiconductive layer is formed of a semiconducting rubber material having high viscosity on a core 9a. Next, a middle lump part 15 to constitute an insulated cylindrical part is formed of an insulating rubber material having high viscosity on the internal lump part 12 and around the periphery of the core 9a. Then, an external lump part 18 to constitute an external semiconducting layer is formed of the semiconducting rubber material having high viscosity on the middle lump part 15 and around the periphery of the core 9a. Lastly, by using a heating/pressuring container 19, the respective lump parts 12, 15, 18 are given heating treatment at a time for curing the rubber materials to make a normal temperature shrinkage type tube.</p> |
