Thin insulating mica sheet and insulated coil
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTadashi Iwabuchi, Osamu Hayashi
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Abstract
A thin insulating sheet comprises an associated mica sheet containing 1 to 9 wt. % of a polymer fibril which is melt-bonded to a polymer film or a porous polymer sheet and impregnated with a resin in a prepreg form.
Claims8
A thin insulating sheet which comprises an associated mica sheet containing 1 to 9 wt.% of a polymer fibril which is melt-bonded to a polymer film without using a binder, the melt-bonded composite having a thickness of 35-65 .mu.m, and impregnated with a resin in a prepreg form, wherein said polymer film is selected from the group consisting of a polyimide film, a polyparabanic acid film, a polyamide film and a polyester film.
An insulated coil which comprises a thin insulating sheet obtained by melt-bonding an associated mica sheet containing 1 to 9 wt.% of a polymer fibril to a polymer film, without using a binder, and impregnating with a resin in a prepreg form which is used for a bare conductor insulation or a turn insulation.
Dependencies are inferred from the claim text.