| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat heating film, which has the excellent even heating property, the excellent electrifying function and the stability, by tightly and evenly adhering the inorganic flat-shaped metal plating powder having a specified dimension to a surface of the resin coating, and drying it, and performing the heat insulating and electricity insulating treatment to a surface and a back surface of the obtained layered film. SOLUTION: A surface of a mold releasing base 1 is coated with a resin layer 2 of PE or the like, which forms a film when it is dried. A conductive material 3 of the inorganic flat-shaped metal plating powder is tightly adhered to the resin-coated surface. This conductive material 3 is obtained by plating sericite, muscovite, phlogopite or the like with copper, and the conductive material 3 having grain diameter at 50-1000μm and thickness at 0.01-50μm is used. The excessive conductive material 3 is cleaned for elimination, and thereafter, the resin layer 2 is dried. This unit process is repeated at a required time, and thereafter, belt-like electrodes 4, 4 are inserted into a desirable layer. This layered film is removed from the base 1, and the surface and the back surface thereof are coated with the heat insulating and electricity insulating resin so as to form a film, and a flat heating film is thereby obtained.
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