▎ 摘　　要

NOVELTY - Carbon-based heating film includes a base material (1), heat preservation layer (2) arranged on the back of the base material, and a conductive ink layer (3), an insulating layer (4) and a heat equalizing layer (5) arranged on the front of the base material in sequence. The substrate is made of polyethylene terephthalate (PET) and/or polyimide (PI), and the insulation layer is used to reduce the radiation heat transfer from the carbon-based heating film to the cavity. The thermal conductivity of the insulating layer is ≥0.2 watts/(m.Kelvin), and the thermal conductivity of the heat equalizing layer is ≥200 Watts/(m.Kelvin). USE - Carbon-based heating film for a toilet seat. ADVANTAGE - The carbon-based heating film has insulation layer, which is used to reduce the radiation heat transfer from the carbon-based heating film to the cavity, and improves the heating rate of the toilet seat and the heating uniformity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a carbon-based heating film for a toilet seat, which involves providing a substrate, forming an insulating layer on the back of the substrate, sequentially forming a conductive ink layer, an insulating layer and a heat equalizing layer on the front of the substrate, and die-cutting. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a carbon-based heating film for a toilet seat. 1Base material 2Heat preservation layer 3Conductive ink layer 4Insulating layer 5Heat-equalizing layer