How can plastic paint be used to prevent paint falling off?
Drying: after coating, it can be dried at room temperature and can be baked at 60 30min.
Spraying: plastic coating thickness of 15~20 m, usually painted 2~3 road to complete. Spray 15min dry and then spray second times. Bright surfaces must be painted with transparent paint. The painted parts have little influence on the flame retardance.
In addition to electricity and dust: plastic products are insulators, surface resistance is generally around 1013, easy to generate static electricity. After electrification, it is easy to absorb small dust in the air and adhere to the surface. It is very difficult to remove dust by electrostatic adsorption by general blowing method. The effect of using high pressure ionized air flow and removing dust at the same time is better.
Oil: plastic surface often Zhanyou oil, hand sweat and release agent, it will make the paint poor adhesion, coating cracking, blistering and shedding. Degreasing treatment should be done before painting. The plastic parts are usually cleaned with gasoline or alcohol, then chemical degreasing. After chemical degreasing, the alkali residue on the surface of the workpiece should be thoroughly cleaned and cleaned with pure water, dried or dried.
Annealing: plastic forming easy to form internal stress, after coating stress concentration place is easy to crack. Annealing or whole face treatment can be used to eliminate stress. Annealing treatment is to ABS plastic molding parts heating to thermal deformation temperature below, that is, 60 degrees, insulation 2h. Due to the adoption of the process requires a lot of equipment investment, therefore, the whole surface processing technology, the configuration can eliminate the internal stress of the plastic solution at room temperature on the plastic surface can be 15 ~ 20min.
