ELECTRICALLY INSULATING SHEET AND METHOD FOR PRODUCING SAME

摘要

Disclosed is an electrically insulating sheet which has excellent heat resistance, electrically insulating properties, impregnatability with resins and insulating oil, mechanical strength and dimensional stability that are required for dynamo-electric machines, static electric machines such as electrical transformers, electrical wire cables and the like. Specifically disclosed is an electrically insulating sheet which uses, as a supporting body, a woven fabric or nonwoven fabric that is formed from polyester fibers and/or polyphenylene sulfide fibers. The electrically insulating sheet is characterized in that the spaces between fibers in the supporting body are filled with a heat-resistant resin that has open cells.