Global IP Counselors, LLP
Insulating varnish and insulated electrical wire using same
An insulating varnish forms an insulating coating film having a shape that corresponds to the shape of an opening of a die, having a uniform thickness. The insulating varnish is applied onto a surface of a conductor, subsequently passes through a die to remove the excess applied insulating varnish, and is then dried or baked to form an insulating coating film on the surface of the conductor. The insulating varnish has a viscosity of 10 Pa·s or more measured by a B-type viscometer at 30° C. The insulating varnish preferably contains no filler, and is preferably a polyimide precursor solution. Since the insulating varnish has a high viscosity, baking and solidification can be performed while maintaining a shape formed when the insulating varnish passes through a die.
SUMITOMO ELECTRIC INDUSTRIES, LTD. SUMITOMO ELECTRIC WINTEC, INC.
C H H H C C C H C Y C
C08G H01B H01B H01B C08G C09D C08G H01B C09D Y10T C08G
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Junichi Masaaki Hideaki Toru Yuudai Yuji Masataka Jun Kengo
Imai Yamauchi Saito Shimizu Furuya Hatanaka Shiwa Sugawara Yoshida