Shielding coating for shrink film printing coating surface and preparation method thereof

The invention belongs to the technical field of polyester shrink films, and particularly relates to a masking coating for the surface of a shrink film printing coating and a preparation method of the masking coating. The PET thermal shrinkage film obtained by arranging the ink printing layer on the single side of the shrinkage film and then arranging the aluminum plating layer on the surface of the ink printing layer is low in light transmittance, high in haze and dim in pattern color. Based on the problems, the invention provides the masking coating for the surface of the shrink film printing coating, the cured coating of the masking coating is relatively high in transparency and does not influence the light transmittance and haze of the shrink film, the pattern of an ink printing layer can be better presented, the color of the pattern is closer to the natural color of the printed pattern, and the masking coating has a better decorative effect; a transparent coating formed after the shielding coating is cure