Hitachi Cable, Inc.

Jfe Steel Corporation

Tsutomu Komori

Seigi Aoyama

Takaaki Ichikawa

Kimihiro Nishimura

Masato Ito

Kazuhiko Shiotani

Katsuo Endo

Hiroshi Yamanobe

Toshiyuki Hoshino

Masataka Omoda

Noboru Nakakuki

Hidenori Kobayashi

Yasuto Inohara

A flexible flat cable has 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 have a modulus of longitudinal elasticity of not less than 300 kg/mm and an elongation of not less than 20%. The plastic films are formed of a polyimide. The adhesive is formed of an epoxy having a glass transition temperature Tg of 80&deg; C. or above, and the 180&deg; peel strength between the adhesive and the single conductor or the plurality of conductors is not less than 0.5 kg/cm.

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

In FFC1 integrated by sandwiching flat type conductors between plastic films with adhesives, wherein the conductors are formed of pure copper or a copper alloy having a wiredrawing draught of at least 95% and an elongation of at least 5%, and the plastic films with adhesives are formed of one having a modulus of longitudinal elasticity of at least 280 kg/mm and an elongation of at least 80%, and the 180&deg; peel strength between the adhesives and the conductors is made to be at least 0.8 kg/cm. As a result, even if the number of conductors is increased than the conventional FFC, bending-resistant characteristic equal to or higher than the conventional FFC can be exhibited.

Bending-resistant flexible flat cable and production process thereof

Growing community of inventors

Ibaraki, Japan

Tsutomu Komori