FLEXIBLE HEATING ELEMENT AND PROCESS OF ITS MANUFACTURE Russian patent published in 2003 - IPC

FIELD: electrothermics, manufacture of electric heaters for household and industrial application. SUBSTANCE: current conducting cloth which warp includes complex current conducting polymer fibers in the form of strips, edge and intermediate electrodes spaced from resistive layer by mass of insulation fibers and which weft has additional electrodes and current distributing electrodes alternating with them and crossing complex current conducting polymer fibers and metallized fibers of warp of current conducting cloth. Process of manufacture of flexible heating element is process in correspondence with which peripheral zones of all current distributing and part of peripheral zones of additional electrodes are stamped in mass of insulation fibers contacting intermediate electrodes or edge electrodes on one side and mass of complex current conducting polymer fibers on other side. Stamping zones of metallized fibers of additional electrodes are located with alternation on one or other side of mass of complex current conducting polymer fibers with formation of commutation comb of specified resistive layer, terminal current leads of copper foil are tinned and soldered to ends of edge and additional or intermediate and additional electrodes on one side of resistive layer which is placed between two layers of insulation coat and are pressed by specific pressure of 8-10 kgf/sq cm with additional pressing of packages when temperature reaches 130-140 C, subsequent working to specified overall dimensions, removal of part of insulation coat, soldering of supply cord and potting of zone of terminal current leads with supply cord in difficult-to-burn epoxy composition of cold hardening. EFFECT: enhanced serviceability and operational reliability of flexible heating element, decreased cost of its manufacture. 4 cl, 6 dwg, 1 tbl