Preparation method of functional coating PEN diaphragm for loudspeaker

The invention provides a preparation method of a functional coating PEN diaphragm for a loudspeaker. The preparation method is characterized by comprising the following steps of: step 1) selecting PENas a substrate, step 2) applying a functional coating onto the substrate, step 3) performing two-sided coating or single-sided coating, and step 4) performing baking, chemical crosslinking, solidifying and take-up. The method has the advantages that the surface of a PEN material is coated with the lightproof black coating with methylbenzene wiping resistance and adjustable rigidity; the heat dissipation performance of PEN is improved; a texture of the diaphragm is improved by adjusting the surface roughness and glossiness of the coating; the rigidity and a damping coefficient of the coating can be adjusted through a coating formula to obtain different loudspeaker listening feelings; the coating has better high temperature resistance than PEN; and a life of the loudspeaker is further prolonged. 本发明提供了种喇叭用功能涂层PEN膜片