The invention discloses a method for preparing a huge dual-side flexible
aluminum foil by spraying a compound solution through an atomizing and
powder-spraying device. The method comprises the following steps: (1) preparing a compound liquid: dissolving a
monomer of
polyimide resin to obtain a
polyimide resin solution, adding PTC (
Positive Temperature Coefficient)
powder into the
polyimide resin solution, and mixing uniformly; (2) heating the
aluminum foil to 100-400 DEG C through a heating device, and spraying the compound solution prepared in the step (1) onto the
aluminum foil by using the atomizing and
powder-spraying device to form a
coating of polyimide resin compound PTC liquid; (3) baking the aluminum foil onto which the polyimide resin compound PTC liquid
coating is sprayed in the step (2), and performing a cross-linking reaction to obtain the huge dual-side flexible aluminum foil. Compared with the prior art, the method has the advantages that the
machining process is simple and convenient, the production efficiency and yield are increased, the thickness consistence of a product is high, and the prepared huge dual-side flexible aluminum foil is high in reliability, quick and accurate in the thermosensitive reaction, and convenient for adjusting the volume.