▎ 摘　　要

NOVELTY - A heating element composition comprises a binder resin, conductive particles, an adhesion enhancer and a heat resistance enhancer. The adhesion enhancer includes polyvinyl acetal. The heat resistance enhancer includes silsesquioxane powder. The conductive particles include carbon nanotubes. The binder resin comprises at least one chosen from a resol-based phenolic resin, an unsaturated polyester resin, and a cresol-based phenolic resin. USE - Heating element composition used for forming film heater for three-dimensional molding applications (claimed). ADVANTAGE - The heating element composition has high elongation through a specific combination of a binder resin and an additive and excellent high-temperature durability, which is in a conflicting relationship with elongation, so that mechanical damage such as cracks during elongation can be suppressed, stably maintained in the molded shape rather than being restored to its original shape after molding, and the change rate of resistance can be minimized during deformation by 3-dimensional molding. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for film heater capable of three-dimensional (3D) molding, which comprises a base film (100), a pair of electrodes (200) formed on one surface of the base film and having different polarities, and at least one heating element (300) connected to each of the pair of electrodes and including carbon nanotubes. The base film comprises a polymer film having a tensile strength of 80 kgf/cm2or more and an elastic modulus of 550-4000 MPa. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional structure of the film heater. 100Base film 200Pair of electrodes 300Heating elements 400Insulating material