Protective layer material for ultrathin flexible film packaging substrate and preparation method thereof

The invention discloses a protective layer material for an ultrathin flexible film packaging substrate and a preparation method thereof, the protective layer material is prepared from the following materials: silicon dioxide, aluminum oxide, aluminum nitride, conductive resin and carbon fibers, and the preparation of the protective layer material also comprises a vacuum box, a dryer, a cleaning instrument, a reaction kettle and a pressurizer. According to the packaging substrate, the anti-static coating and the protective layer on the outer side are combined to form a stronger protective layer effect, the stable chemical properties of silicon dioxide, aluminum oxide and aluminum nitride are utilized, so that the packaging substrate is resistant to high temperature, the outer surface strength is improved, the packaging substrate is resistant to scratch, the protection and quality of the packaging substrate are improved, and the service life of the packaging substrate is prolonged. And the antistatic coating fo