METHOD OF MANUFACTURING FLAT ELECTRIC HEATER

摘要

A method of producing a panel heater element by the steps of mixing carbon fiber with natural or synthetic fibers, forming the mixture into a base sheet, heat-treating the base sheet to expel volatile matter therefrom, fitting electrodes to the sheet, placing an insulative thermoplastic resin film against both surfaces of the base sheet and hot-rolling the base sheet, and finally cold-rolling the resin-coated sheet.