SEMICONDUCTING TAPE Russian patent published in 2000 - IPC

FIELD: electromechanical engineering; corona protection of electrical machine high-voltage windings. SUBSTANCE: tape has fibrous substrate of glass-reinforced fabric, lavsan, aramide, or lavsan-aramide paper strip, 30 to 200 mcm thick, covered with semiconducting compound including carbon- containing conducting filler, polymeric binder of butadiene-nitrile rubber, organic solvent, sulfur, thiuram, zinc diethyl dithiocarbamate, and zinc oxide, proportion of ingredients being as follows, mas.%: butadiene-nitrile rubber, 13.0-19.0; carbon-containing conducting filler, 2.5-18.5; sulfur, 0.3-0.7; thiuram, 0.001-0.2; zinc diethyl dithiocarbamate, 0.001- 0.1; zinc oxide, 0.0001-0.4; organic solvent, the balance; proportion of semiconducting tape components is as follows, mas.%: semiconducting compound, 15-35; substrate, 65-95. Semiconductor tape is capable of varying surface resistivity between 0,5•10² and 9•10⁹ Ohms. EFFECT: improved strength and elasticity of tape. 1 tbl