Patent ID: 7750246
Filing Date: 2010-07-06
Classification: H01B

Abstract:
1. An electric cable comprising: an electrical conductor surrounded by a first layer having at least one winding of mica tape, said mica tape being made up of mica particles deposited by means of a polymer binder on a backing; a second layer having at least one winding of a polyimide tape; and a third layer having at least one winding of a polytetrafluoroethylene tape; the first layer being subjected to heat treatment at a temperature of at least 400° C.; and the ratio R of the weight per unit length of PTFE over the sum of the weights per unit length of the polymer binder and of the polyimide being such that: R is greater than or equal to 2 when the section of the electrical conductor is no greater than 0.2 mm R is greater than or equal to 4 when the section of the electrical conductor is strictly greater than 0.2 mm R is greater than or equal to 6 when the section of the electrical conductor is equal to 0.6 mm R is greater than or equal to 12 when the section of the electrical conductor is strictly greater than 0.6 mm