| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulation wire which is excellent in flexibility, prevents simultaneous breaks, and has high dielectric breakdown resistance and partial discharge starting voltage with respect to partial discharge.SOLUTION: There is provided an insulation wire which is an insulation wire having a linear conductor and a plurality of insulation layers laminated on the outer peripheral surface of the conductor, where a first insulation layer positioned in the outermost out of the plurality of insulation layers has a matrix containing a synthetic resin as a main component and a plurality of pores dispersed in the matrix, and at least one second insulation layer positioned inside of the first insulation layer out of the plurality of insulation layers has a matrix containing a synthetic resin as a main component and a plurality of inorganic fillers dispersed in the matrix. The second insulation layer may be positioned right above the conductor. A porosity of the first insulation layer is preferably 10% or more and 80% or less. The content ratio of the inorganic fillers in the second insulation layer is preferably 3 vol.% or more and 30 vol.% or less.SELECTED DRAWING: Figure 1 |
