METHOD FOR IMPROVING PI NON-STICKINESS OF SUBSTRATE AND PI SOLUTION

摘要

The present invention provides a method for improving PI non-stickiness of a substrate and a PI solution. The method for improving the PI non-stickiness of a substrate comprises the following steps: step 1, providing a substrate and a PI solution, the PI solution containing the following components: PI molecules and solvent, the PI molecules having hydrophobic groups; and step 2, coating the PI solution on the substrate and forming a PI film. The PI solution contains the following components: PI molecules and solvent, the PI molecules having hydrophobic groups, and the solvent being N-methyl pyrrolidone, gamma-butyrolactone, carbonic acid butyl ester, or a mixed solvent thereof. In the method for improving PI non-stickiness of a substrate and the PI solution according to the present invention, the PI molecules in the PI solution have hydrophobic groups, and when the PI solution is used for coating the substrate, the hydrophobic groups can be connected with the organic matter on the surface of the substrate, thereby improving the affinity of the PI solution with the surface of the substrate, improving the PI non-stickiness, improving the coating effect, and improving printing quality of the substrate.