Causes and treatment methods of dull surface of printed board
Addtime:
2023-07-20
The surface of the printed board is relatively glossy, and there are many reasons for matte. In the production and processing process, everyone should pay attention to finding the cause of insufficient color and solve it, otherwise it will affect the use effect of the product. Under a certain influence, the following will introduce the reasons for matte and how to deal with it.
The surface of the printed board is relatively glossy, and there are many reasons for matte. In the production and processing process, everyone should pay attention to finding the cause of insufficient color and solve it, otherwise it will affect the use effect of the product. Under a certain influence, the following will introduce the reasons for matte and how to deal with it.
Reasons for glossy printed boards:
1. The reason for the coating formula, too many pigments, fillers and solvents in the coating, and insufficient fineness or dust.
2. The surface of the substrate is rough or has oil, moisture, wax, etc., and the coating is not completely cured.
3. Before using the machine, the paint is not fully mixed, and the solids of the paint settle on the bottom of the bucket, so there is less paint in the work bucket during construction.
4. Excessive use of diluent in paint will dilute the effect of glossy paint.
5. During the construction process of the printed board, the surface coating is too thin, and the room temperature of the roller coating chamber is too high or too low.
6. The temperature setting of the curing furnace is too high, the hot air circulation in the heating furnace is insufficient, and the coating is overheated, which will cause the gloss of the eyes to age and reduce the gloss.
Treatment method of matte printed board:
1. Check whether the fineness of the machine coating meets the process requirements.
2. Before applying the printing board paint to the machine, it should be fully mixed and evenly filtered, and too much diluent should not be added.
3. Control the humidity of the roller coating chamber to prevent moisture from mixing into the coating.
4. Check whether the diluent matches the paint and make sure that the wet film thickness of the topcoat is not too thin.
5. The furnace temperature setting of each section of the curing furnace should be reasonable to avoid too high or too low.
The above are the main reasons and solutions for the dull surface of the printed board. If it does not affect its gloss, you need to master the correct operation technology. In the process of paint mixing, pay attention to the correct mastery of the coating method to ensure that the thickness of the coating film meets the requirements.
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