Mica electrothermal film

The utility model relates to the technical field of heating films, in particular to a mica electrothermal film. A mica electrothermal film comprises a mica electrothermal film body, the mica electrothermal film body comprises an upper mica plate, a metal foil wire and a lower mica plate, and a first wire groove is formed in the surface of the upper mica plate through laser etching; a second wire groove is formed in the surface of the lower mica plate through laser etching; the first wire groove and the second wire groove form a wire path groove for placing a metal foil wire; and the metal foil wire is fixedly connected between the upper mica plate and the lower mica plate through hot pressing. The resistance wire is good in stability, the overall electro-thermal conversion efficiency is good, and the working efficiency is high. 本申请涉及发热膜技术领域，尤其是一种云母电热膜。一种云母电热膜，包括云母电热膜主体，云母电热膜主体包括上云母板、金属箔丝、下云母板，上云母板表面激光刻蚀形成有第一丝槽；下云母板表面激光刻蚀形成有第二丝槽；第一丝槽和第二丝槽形成有供金属箔丝安置的丝路槽；金属箔丝热压固定连接于上云母板和下云母板之间。本申请中的电阻丝稳定性好，整体的电热转换效率较好，工作效率较高。