We have recently found a problem in the small edition of new materials for the production of colour-coated rolls. As the weather is getting colder and colder, the phenomenon of over-exploding paint appears in different types of colour-coated rolls in many places. Is this really the reason of the weather? In fact, it is not all. Today, let's talk about the reason.
1. Passivation plate temperature production process is required to check once every two hours, the reason is that staff did not regularly track the temperature of the passivation plate during the inspection. Especially in winter, the temperature changes within 2 hours are relatively large, which will eventually lead to the aging of the color coating roll, and scratch the paint when pressing.
2. In the process of production, there is dust on the exit inspection mirror and on some rolls. Dust will directly affect the surface quality of the rolls. It may not appear at the beginning, but once a long time, or in the sunshine, the phenomenon of paint explosion will occur.
3. Passivating liquid is added first, then water is added. Because of the density problem of passivation solution, such as when the density of passivation solution is higher than that of water, the mixture of raw materials is not uniform, and the adhesion between passivation layer and substrate is not good, so it is very easy to make the surface of color coating roll explode.
We should have a better understanding of the phenomenon of color coatings and explosive coatings. Therefore, we still need to standardize the operation, seriously operate, and produce high-quality products.