Production of an electrical heating layer comprises applying a coating composition containing a dispersion of a synthetic polymer in a dispersant, a dissolved dispersion resin in a dispersant and graphite on a substrate, then drying

摘要

Production of an electrical heating layer comprises applying a coating composition containing a dispersion of a synthetic polymer in a dispersant, a dissolved dispersion resin in a dispersant and graphite on a substrate, then drying the applied composition. Preferably an electrically conducting carbon black is additionally added to the coating composition. The ratio of the amount of graphite or the ratio of the sum of the amount of graphite and the carbon black in the coating composition to the sum of the amount of the synthetic polymer and the resin in the coating composition is 4-12: 1.