first: precision parts.

Teflon coating sprayed on the workpiece is20-35 microns, for precision parts, there may be a relatively large deviation.

In addition, after high-temperature baking, many materials will be slightly deformed due to thermal expansion and contraction, which is unacceptable for precision parts.

second: can not withstand high temperature of the workpiece.

because the Teflon coating curing conditions are required to bake380 degrees for 10 minutes. If you can't withstand this high temperature, you can't apply Teflon paint on its surface.

third: the workpiece is mirror effect.

Because Teflon coating requires sandblasting, if there is no sandblasting, the adhesion of Teflon coating on the workpiece is not good, and the roughness of the surface after sandblasting is3-6 microns.

In addition, there are the characteristics of Teflon coating. The essence of the curing process is that Teflon powder is melted and paved on the surface of the workpiece. Therefore, the coating surface cannot reach the mirror effect, and the products produced have no mirror effect.

fourth: large shrinkage of the workpiece.

Teflon paint needs baking380 degrees, the workpiece will expand with heat and shrink with cold during this process. If the shrinkage rate of the workpiece is large, it will expand more than the coating when heated, and it will break the coating, causing the coating to crack. In some cases, it is not obvious and cannot be seen by the naked eye. It can be clearly seen with a 100-fold magnifying glass. Therefore, this factor should be considered in the selection of the substrate.

fifth: the requirements of wear resistance and scratch resistance of the working environment.

because the pencil hardness of Teflon paint is less2H, in the process of use, can't use hard objects to bump it. Rubbing it, you can't use harder, rough items. Most obviously, Teflon non-stick pan obviously reminds users that only wooden shovel, bamboo shovel and silicone shovel can be used, and shovel can not be used.