The solution of PC material UV spray paint falling paint

PC material is widely used in the production and life fields of electronic appliances, auto parts, mechanical equipment parts, lighting, toys, bottle caps, mobile phone parts packages, etc. Generally speaking, PC substrate has good adhesion with paint in coating technology. The more common coating types are thermoplastic coatings and UV coatings. However, in some modified PC materials, coating adhesion is still very poor. The following is a case of UV coating on the surface of PC, to understand the solution to the coating problem in the coating of PC material.

PC treatment agent solves the problem of UV coating for PC material coating .

Problem phenomenon:

When the PC material sprayed UV primer passed the adhesion test of the 3M600 tape, the coating problem of poor adhesion of the 100 grid occurred, which refers to the phenomenon of pulling out the edge.

Cause Analysis:

In the theory of coating adhesion, the strong adhesion of UV coatings to PC substrates requires good adhesion between the two. The strength of adhesion has a lot to do with the wetting effect of the paint and the substrate, the binding force between the molecules and the cooperation of chemical bonds. After excluding the influence factors of surface dust and moisture on the adhesion, the main reason for the paint falling is that the UV paint and the PC material cannot form a good interlayer adhesion effect, and the adhesion strength is weak.

solution:

By analyzing the reasons of PC coating UV coating, it is concluded that the adhesion between PC and UV coating needs to be improved. In the case of cleaning technical specifications, the bottom of the adhesion treatment agent is coated on the surface of the substrate, and then coating In the method of UV coating, the adhesion treatment agent is used to enhance the wetting and form a chemical bond. The substrate and the coating form a physical and chemical bond through the treatment agent to improve.

Instructions:

1. The surface of the PC material is clean and clean (dust, moisture, etc. remove the weak interface layer)

2. Coating adhesion treatment agent (baking at 70℃ for 5 minutes)

3. Apply UV primer.