Abstract: A manufacturing method of a PTC (Positive Temperature Coefficient) element includes: producing a polymer aqueous emulsion solution; producing a polymer aqueous emulsion conductive composite by mixing the polymer aqueous emulsion solution with a conductive agent; and producing the PTC element by coating a substrate with the polymer aqueous emulsion conductive composite, or print the polymer aqueous emulsion conductive composite on the substrate, or dipping the substrate in the polymer aqueous emulsion conductive composite and drying the substrate. Here, the polymer aqueous emulsion solution includes an adhesive polymer, a cross-linking agent, an initiator, and water. The substrate is film, non-woven, textile, inflexible plate, and the like, which are formed of polymer resin.

Abstract: The present invention relates to a PTC (Positive Temperature Coefficient) element manufactured using a polymer aqueous emulsion conductive composite, and a planar heating element using the same. By controlling electric connection of the heating element using the PTC element, it is possible to control a heating temperature of the heating element to be in a desired range and to improve stability of the heating element. It is easy to manufacture the PTC manufactured using the polymer aqueous emulsion conductive composite, and PTC characteristics thereof can be satisfactorily kept even in use for a long period. Since the planar heating element manufactured using the PTC element has a self temperature control function, a separate temperature control device is unnecessary, which is economical.