ELECTRIC INSULATING RESIN SHEET FOR MOTOR, AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an electric insulating resin sheet for a motor that has a high dielectric breakdown voltage as well as high heat resistance and electric insulation property, in an electric insulating resin sheet for a motor that is used for insulation between coil wires of a motor or between a coil wire and an iron core, and to provide a method of manufacturing the same.

SOLUTION: An electric insulating resin sheet for a motor has a porous resin layer containing thermoplastic resin. A relative dielectric constant at 1 GHz of the porous resin layer is 2.0 or less. It is preferred that the porous resin layer contains air bubbles having the average air bubble diameter of 5.0 μm or less and the porosity of 30% or more.

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