The basic environmental requirements of the painting line

For the modern coating line, it can generally meet the requirements of constant temperature, constant humidity and clean air (air dust content < 10mg / m3); but for the relatively simple coating production line, it is difficult to ensure constant temperature, constant humidity and clean air, so that the coating work piece can not achieve satisfactory coating effect, and the paint film is easy to produce defects such as pinhole (shrinkage), orange peel, particle and so on In order to avoid paint When the film produces pinholes and orange peel, first of all, the temperature and humidity in the spraying room should be improved to make the temperature and humidity in the spraying room meet the process requirements; second, the viscosity and diluent composition of the construction coating should be adjusted according to different temperature and humidity; generally, the temperature of the spraying room must be controlled below 35 ℃ and the humidity below 80% in the spraying construction In order to effectively control the amount of air dust in the coating production line, first of all, the environmental conditions outside the production line shall be improved, and the grinding and cleaning processes shall be separated from the painting processes, so as to avoid the dust generated by grinding from entering the painting room or drying (curing) furnace of the production line to eliminate the impact of grinding dust on the painting; secondly, the air filter cloth shall be replaced regularly to ensure that the dust in the air can be effectively removed 。 In recent years, with the strict requirements of environmental protection, water-based coatings, high solid coatings, powder coatings and other environmental protection coatings have developed rapidly It is reported that the annual production of powder coatings in China has reached 60000 tons, ranking the fourth in the world after the United States, Italy and Germany Since the 1980s, China has introduced more than 500 powder coating production lines According to the current situation, it should be said that it has basically reached saturation How to speed up the localization of powder coating equipment has become an urgent issue for the coating industry in China