Plastic spray paint how to do in order to prevent paint removal

1. Annealing: plastic molding is easy to form internal stress, after painting the stress concentration is easy to crack. Can use annealing treatment or the whole surface treatment to eliminate stress. Annealing treatment is the ABS plastic molding parts heated to below the heat distortion temperature, i.e., 60 ℃, holding 2 h. Because of the use of this process requires a large amount of investment in equipment, therefore, can be used throughout the surface of the technology, that is, configure to eliminate the internal stress of the plastic parts of the solution at room temperature on the surface of the plastic parts can be 15 ~ 20min of treatment.

2. Degreasing: the surface of the plastic parts are often stained with oil, hand sweat and mold release agent, it will make the coating adhesion deterioration, coating cracking, blistering and peeling. Degreasing treatment should be carried out before coating. Plastic parts are usually cleaned with gasoline or alcohol, and then chemical degreasing chemical degreasing should be thoroughly clean the surface of the workpiece residual lye, and use pure water to clean the last, dry or drying.

3. In addition to electricity and dust: plastic products are insulators, surface resistance is generally around 1013Ω, easy to generate static electricity. Electrified easily adsorbed fine dust in the air and attached to the surface. Due to electrostatic adsorption of dust with the general blowing method is very difficult to remove, the use of high-pressure ionized air flow at the same time in addition to the effect of electricity and dust removal is better.

4. Spraying: the thickness of the plastic coating is 15~20μm, usually 2~3 spraying to complete. A spraying after drying 15min, and then the second spraying. Need to bright surface must also be sprayed transparent coating. The coated parts have no effect on the flame retardant properties.

5. Drying: After coating, it can be self-drying at room temperature, or baked at 60℃ for 30min.