▎ 摘　　要

NOVELTY - Preparing piezoelectric film comprises dispersing conductive nanoparticles and elastic polymer in solvent to obtain a mixed material, heating the mixed material into molten state, extruding according to the blow molding process to obtain a ring-shaped film material, pressing ring-shaped film material into film and carrying out roll pressing to obtain final product, where during the extrusion process, the extrusion port continuously rotates with the central axis of the extrusion port as the rotation axis. USE - The piezoelectric film is useful in pressure-sensitive film sensor, as robot skin in robot and electronic device containing thin film circuit (all are claimed). ADVANTAGE - The method: can quickly obtain a piezoresistive film with thin thickness, stable thickness and excellent thickness uniformity, and can greatly improve the production efficiency of the piezoresistive film. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) Pressure-sensitive film sensor comprising first conductive layer, piezoresistive film laminated on the first conductive layer and second conductive layer laminated on the piezoresistive film; (2) Electronic device comprising film circuit containing piezoresistive film.