1. Brush coater is the oldest coating equipment. It was originally used to produce coated wall wallpaper with porcelain clay paint in 1950s. There are three different types of brush heads: circular brush head, blanket roller head and blanket sleeve head.
2. The appearance of air knife coater in 1930s marked the birth of modern paper coating industry. Air-knife coater just overcame the above shortcomings of brush coater and quickly gained popularity, which greatly increased the output of coated paper.
3. The first patent of blade coater appeared in 1950s. Since then, the blade coater technology has developed rapidly. According to the different feeding equipment, scraper type and scraper installation position, the scraper coating head is also divided into many types, such as hard-edge scraper coater, scraper coater, soft-edge scraper coater, fountain feed scraper coater, short-stay scraper coater, scraper coater and scraper roller coater.
4. Roller coating is to apply the coating on the surface of the coating with a coating roller. This coating machine is the main coating machine in the machine. The coating amount can be adjusted by the pressure between metering rollers. When the pressure is increased, the coating amount will decrease.