| 摘要 |
An electric wire that has a conductor held by spacers in a covering of polytetrafluoro-ethylene (PTFE), continuous cells being formed between the covering, the spacers, and the conductor. In an axial section, the majority of the PTFE fibers of the spacers point in a substantially radial direction, thereby imparting excellent robustness to the spacers. A method of manufacturing such an electric wire, in which method an extrudate of PTFE is caused to pass through an extrusion passage around the conductor in such a manner as to form the covering; so that: upstream from an expansion section, the covering is formed by a guide; and downstream from this section, the cells are formed by section members, the spacers being formed by filling expansion channels situated between walls of the section members. |
