PVC material toys are sprayed with UV paint, vacuum plating, and primer coating adhesion treatment agent to solve the problem of paint falling off

Problem requirements:

　　The toy doll made of PVC material was sprayed with UV primer and then subjected to vacuum electroplating process, but the UV primer was peeled off, resulting in insufficient firmness of the entire electroplated coating after electroplating, resulting in undesirable phenomena.

  Cause Analysis:

First of all, from the perspective of cleaning and cleaning the surface of the material, if there are oily or dirty substances on the surface of the material, it will affect the binding force of the UV paint film and the surface of the substrate and will form a weak interface layer, polar points and the two. The bond between the points is reduced. Another reason is that the adhesion between the substrate and the paint is not enough, and the combination of sufficient polar groups has not occurred, and a strong bond is not formed.

  solution:

First, clean the surface of the substrate, remove dirt and oil, and other impurities, ensure that there is no abnormality in the surface coating interface, and eliminate the phenomenon of false adhesion. After the test of the solution, the problem of the surface of the substrate such as oil stains has been comprehensively eliminated, focusing on It is solved by improving the adhesion between the PVC substrate and the UV paint. Then the PVC adhesion treatment agent can be primed by the primer method, and the polymer in the treatment agent can form a film layer on the surface of the substrate, and then spray UV paint to improve the enhanced polarity point of the polar group. The formation of a covalent bond between them promotes the firm adhesion of the paint film.