Grinding process common failure analysis--light oil is not water resistant

(1) Failure phenomenon The varnish curing and drying are not complete; the wrong resin or varnish system resin is too high or too low; the varnish system

The filler is not water-resistant; the coating system contains too many non-reactive hydrophilic diluents, which will remain in the varnish film when cured and dry, thus affecting the water resistance of varnish.

(2) The solution uses unaged infrared or ultraviolet light source or prolongs the curing and drying time of the varnish, and selects the resin with good film-forming property or fastness as the varnish material, and controls the PH value of the resin in the varnish system. .5-9.3 is good (low flow is poor, but water resistance is good; too high coating flow is flat and poor water resistance and poor adhesion); use a good water-resistant filler (such as mica powder, Talc or active calcium); replace with a good water-resistant paint.