Heat-resistant, flex-resistant flexible flat cable and process for producing the same

Abstract

In a flexible flat cable comprising a single conductor or a plurality of conductors, juxtaposed to each other or one another, which are sandwiched between a pair of plastic films with an adhesive to form an integral structure, the plastic films with an adhesive each are formed of a polyimide with an adhesive which has a modulus of longitudinal elasticity of not less than 300 kg/mm2 and an elongation of not less than 20%, the adhesive is formed of an epoxy having a glass transition temperature Tg of 80° C. or above, and the 180° peel strength between the adhesive and the conductor is not less than 0.5 kg/cm. By virtue of this constitution, a novel flexible flat cable can be realized which has significantly improved heat resistance and, at the same time, has excellent flex resistance even at a high temperature of 80° C. or above.

Dependencies are inferred from the claim text.