To provide insulative material of unchanging electric particle discharge adaptable to the environment and suitable for use at a relatively high temperature and under a high voltage.
Electric insulative material includes an insulation layer 10 and a polymer, particularly thermoplastic resin. The insulation layer 10 has mineral which has particle size particularly not more than 20 μm and is formed in a thin plate shape, particularly a micro mica thin plate 2. The micro mica thin plates 2 are laminated so that hollow parts are formed between the micro mica thin plates 2 and are substantially in parallel to the insulation layer 10. The polymer is permanently linked with the insulation layer 10 and the hollow parts 3 of the insulation layer 10 are filled with the polymer, and thus more uniform insulative material 1 can be obtained.
BJOERKLUND ANDERS
OESTERHELD JOERG
