Insulating tape and method of producing it

Details Insulating tape and method of producing it Insulating tape and method of producing it

B - Operations, Transporting

32

B

B32B 19/02 (2006.01) B29C 70/02 (2006.01) B32B 27/04 (2006.01) B32B 38/08 (2006.01) H01B 3/04 (2006.01) H01B 3/08 (2006.01)

Patent

CA 2111368

To improve the thermal conductivity of the main insulation of a conductor bar of an electrical machine, an insulating tape is proposed which is composed of one or more glass-fabric layers (6) and mica layers (5). Only essentially the interspaces of the glass fabric (6) which is made up of glass threads (7) are filled with a resin (8) which is provided with a filler containing microscopically small particles (9) having a thermal conductivity which is greater than that of the resin. To protect the glass threads (7) of the fabric, its threads (7) are provided with a protective coating (10) of resin or lacquer, said protective coating (10) essentially only surrounding the threads of the glass fabric (6), but otherwise not completely filling the interspaces of the fabric. A main insulation made up of such an insulating tape fulfils all the requirements with regard to mechanical and thermal stability and electrical strength.

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