Corner coverage: Before spraying, add about 0.5-1.0% of the total formula rheological agents such as polyethylene wax, polyvinyl butyl, or add resistance to the paint
The method of steel plate for testing powder coating powder is:
1. Corner coverage: before spraying, add about 0.5-1.0% of the total formula in the coating, such as polyethylene wax, polyvinyl butyl and other rheological agents, or add the blocking agent of silica to improve the flow. In this way, the inner and outer surfaces of the coated workpiece corners are powdered during spraying and solidified into film, which can be as uniform as the plane position and does not produce the phenomenon of shrinking edge and fat edge.
2. Powdery: Powdery phenomenon refers to the formation of nodular nodules after coating adsorption to the workpiece curing. The main reason is the coating powder agglomeration, or atomization is not uniform. There is a situation where some types of powder such as metal powder are adsorbed to the gun head.
The specific operation method is as follows: the vertical distance between the upper mouth of the alcohol blowtorch and the detection board is 6.0cm. The highest temperature of the stably burning alcohol blowtorch flame can reach more than 1000. The flame temperature and flame impact force of the water-cooled screw unit are basically consistent with the standard method.