Tech Text

The Factors Make The Coating Of Security Screen Mesh Fall Off

There are many factors that make the coating of security screen mesh fall off. This article mainly describes the four main reasons for the fall off of the coating.
1. The quality of the powder is not good; the main reason is that the particle size of the powder is different and that will cause the powder to be insufficient at the time of high temperature melting, so its adsorption force will naturally become smaller.
2. the temperature is not enough; the use of good quality powder should also pay special attention, before entering the mesh to reach the spray chamber, the temperature of the oven must reach 200 degrees or more, if the temperature does not reach, the powder will melt at high temperature insufficient, it will not be very good if it is fixed on the security screen mesh.
3. the quality of the mesh; the most important thing is that the security screen mesh must be clean before the spray, the surface can not have dust, but also can not have grease, if the surface of the mesh is not hygienic will also affect the adsorption of the powder
4. The surface of the mesh itself is curved, so it will stick badly.
Note: The surface of the security screen mesh is oily, dusty
The wire diameter is fine. Under the condition of thermal expansion and contraction, the adhesion of the paint is not good. (There is no absolute cleanness. To be absolutely clean, it must be cleaned with pure water. At present, this level is not reached in China.)
Epoxy coating paint is hard lacquer, not resistant to thermal expansion and contraction, PVC is soft lacquer, resistant to thermal expansion and contraction.