| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat heater element having high efficiency. SOLUTION: Heat-resistant resin sheets 2b are vacuum thermo-compression- bonded on both faces of a flat heater element 2a via a hot-melt adhesive to form a flat heater element 2. The flat heater element 2a is made of a conductive woven fabric impregnated with metal grains or carbon grains into a heat- resistant woven fabric, for example, and TPO is used for the resin sheets 2b. If conductive layers are formed on the resin sheets 2b, an electric leakage between the heater element 2a and the conductive layers 2b is detected, and an accident caused by an overcurrent can be prevented.
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