The main reasons for the peeling of glass UV printing patterns are as follows:
Bad glass surface treatment: the glass surface oil, dust and other impurities are not removed, which will affect the adhesion of the UV coating, resulting in the peeling of the pattern.
Bad quality of UV coating: poor quality of UV coating will lead to poor adhesion of the coating film, easy to peel.
Improper UV printing process: Improper UV printing process, such as uneven amount of coating spray, insufficient curing time, etc., will also lead to pattern peeling.
For the above reasons, the following measures can be taken to solve the problem of glass UV printing pattern peeling:
Glass surface treatment: before UV printing, the glass surface should be thoroughly cleaned to remove oil, dust and other impurities.
UV coating selection: choose good quality UV coatings, and pay attention to the compatibility of coatings and glass surface.
UV printing process: strictly in accordance with the UV printing process, to ensure that the paint spraying uniformity, curing time is sufficient.
Specific measures are as follows:
Glass surface treatment:
Use cleaner or decontamination powder to clean the glass surface, remove oil, dust and other impurities.
Use anhydrous alcohol or isopropyl alcohol to wipe the glass surface to remove residual detergent or stain removal powder.
Use degreasing cotton wool to wipe the glass surface to ensure that the glass surface is completely dry.
UV Paint Selection:
Select a UV paint that is specifically designed for glass UV printing.
Pay attention to the compatibility of the UV coating with the glass surface.
UV printing process:
Spraying amount of uniformity: the amount of UV coating sprayed should be uniform, not too thick or too thin.
Sufficient curing time: UV coating curing time should be sufficient, generally between 2-5 minutes.
In addition, a special primer for UV printing can be used to improve the adhesion of the UV coating to the glass surface and prevent the pattern from peeling.