Preparation method of long-afterglow luminescent plastics

The invention discloses a preparation method of long-afterglow luminescent plastics. The preparation method comprises the following specific steps: simply plastifying and mixing organically modified long-afterglow luminescent materials used as luminescent pigment and thermoplastic polyurethane used as base resin to obtain long-afterglow luminescent polyurethane plastic or luminescent polyurethane plastic masterbatch; and blending the luminescent polyurethane plastic masterbatch with other high molecular materials to obtain different types of long-afterglow luminescent plastics. The method can solve the compatibility between inorganic luminescent powder and plastics, and can avoid the problem that the luminescent powder blackens in the processing procedure of the luminescent plastics; and the prepared long-afterglow luminescent plastics are uniform in color and fine in mechanical property and luminescence performance, can be widely used for various plates, hoses, films, automobile parts, auxiliary materials an