| 摘要 |
PROBLEM TO BE SOLVED: To provide a product, in which a change of resistance value is not generated before and after the forming, by using a sheet, which is formed by heating, compressing and curing a composite material formed of carbon fiber and thermosetting resin, as a conductive sheet at the time of manufacturing surface heater. SOLUTION: A surface heater is formed by providing a conductive sheet, in which electrode materials are arranged, between resin layers, and heating and compressing them for integration. As a conductive sheet, a sheet formed by heating, compressing and curing a composite sheet, which is formed of carbon fiber and thermosetting resin, and forming it at the predetermined thickness is used. For example, after impregnating a carbon fiber surface material with the thermosetting resin, which is diluted with the solvent, the resin is formed into a sheet as a tack-free prepreg in the precuring condition. In this composite sheet, content of the carbon fiber is set at 30g/m<2> , and as a carbon fiber, pitch group curved carbon fiber is desirably used. As a thermosetting resin, phenol resin, urea-formaldehyde resin, melamine resin, unsaturated polyester resin and polyurethane resin or the like is used. |
