| 摘要 |
<p>1,104,098. Ribbon cables. ROGERS CORPORATION. 16 March, 1965 [16 March, 1964], No. 11121/65. Heading H1A. A flat flexible electric cable comprises a plurality of parallel insulated conductors and a film of aromatic polyimide resin in contact with at least one surface of the conductors. The conductors may be embedded in the polyimide film or may be disposed between a pair of sheets of flexible insulating material of which one at least is the polyimide, and the other may be polyester, polycarbonate, polyvinylidene chloride, polyvinylidene fluoride, polyethylene, P.T.F.E., P.T.F.C.E. or a flexible fibrous material impregnated with flexible resinous material, particularly a polyimide resin. The polyimide resin is preferably a polyamideimide resin as described in Specifications 935,388 and 1,028,927. In a continuous process, copper foil 60 is slit by slitter 29 into a number of parallel conductors which are wetted by a solution of an aromatic polyamic acid 32 in tank 31. At the same time, a backing strip, e.g. of glass fibre is fed from reel 33 and impregnated with the resin solution and the conductors and backing are squeezed together by rollers 36, heated to remove solvent in tower 37 and to cure the resin in tower 38. The coated conductor is wound on to reel 39. Alternatively, the cable may be formed on, and stripped from, an endless steel belt as illustrated by Fig. 6 (not shown). Fig. 7 (not shown), illustrates a continuous method of producing a flat cable which also incorporates metal shields for the conductor.</p> |
