UV coating production process

UV coating production process

Evaporation vacuum metallization deposit aluminum on the surface of plastic by PVD technology, it can make the plastic surface be metallized, and then spray a variety of colors. This process required UV treatment before metalizing and after metalizing.

The following is the UV coating production process and parameters:

• Step 1: Check the UV line, and confirm that the system (dust, spray gun, compressed air, infrared heating and UV curing) is operating properly.

• Step 2: Clean the surface of the substrate, wipe the oil (wipe the surface with a clean and dust-free cloth dipped N-heptane oil and isopropyl alcohol, and immediately dry).

• Step 3: Electrostatic dust collection of substrates.

• Step 4: Spray primer, Thickness of primer is 10~30μm, can be adjusted according to the specific substrate and exactly requirements.

• Step 5: Flashing off 5 to 15 minutes in the 30℃ ~70℃ infrared environment.

• Step 6: UV curing, Exposure energy is 600~1200mJ/cm2.

• Step 7: Unloading, cooling, and then vacuum metalizing (indium, indium-tin, aluminum and so on).

• Step 8: After vacuum metalizing finished, static cool down the workpieces (Generally ≥ 5 minutes, the longest no more than 4 hours).

• Step 9: Spray mid-paint. Thickness of film is 4~12 μm, Paste can be added as needed.

• Step 10: Flashing off 5 to 15 minutes in the 30℃ ~70℃ infrared environment.

• Step 11: UV curing, Exposure energy is 300~800mJ/cm2.

• Step 12: Spray varnish, Thickness of it is 10~30 μm.

• Step 13: Flashing off 5 to 15 minutes in the 30℃ ~70℃ infrared environment.

• Step 14: UV curing, Exposure energy is 800~1500mJ/cm2, (the deeper the color, the higher the energy required).

• Last step: Detection