What Are The Classification Of Coating Machines?

The coating of base paper can be divided into one side coating and two side coating. coating 。 Single side coating is only one side of the base paper coated, such as single side coated paper; double-sided coating is on both sides of the base paper are coated with paint, such as double-sided coated paper. Both single side coated paper and double-sided coated paper can be divided into single layer coating (single coating) and double coating (two times coating). Double coating is used to produce coated paper with higher quality requirement and larger coating. Double coated paper has better printability than single coated paper. It is an effective way to improve the quality of coated paper.

What are the classifications of coating machines?

According to the relationship between coating machine and paper machine, coating operation is divided into internal and external types, and the coating is divided into single layer coating and double coating. Machine coating is equipped with coating machines on paper machines to make paper and coating continuously. External coating is the coating machine which is independent of coating machine and paper machine and used for coating operation. There are mainly three kinds of coating machines: roller coater, air knife coater and blade coating machine.

What are the characteristics of roller coating?

Roller coater is coated with rollers coated with paper, and the coating machine is the main coating machine. The amount of coating can be adjusted by measuring the pressure between rollers, the pressure is strengthened, the amount of coating is reduced, and the amount of coating is reduced. The advantages of the roller type double sided coating machine are simple structure, double side coating at the same time, as the coating machine inside the machine has a more suitable coating speed, and it is not easy to produce coating streaks. The disadvantage is that it is not easy to get the coating thickness of the air knife coater, nor can it get the smoothness of the scraper coater. gloss 。

What are the characteristics of air knife coating?

The air scraper coater is designed to adjust the coating amount and the smoothness of the coating layer by means of compressed air ejected from the air. The advantage of air knife coating is that it can get thicker coating amount, coating layer is more uniform, coating is not easy to break paper, especially suitable for pressure sensitive coating. However, because the blade of the coating machine is an invisible air knife, to make the coating uniform and smooth, it requires coating with the corresponding concentration and crafty, the disadvantage is that it can not carry out high solid content coating, and the air knife is easy to be partially blocked by dry coating, resulting in coating marks.

What are the characteristics of blade coating?

The principle of scraper coater is basically the same as that of air knife coater. After coating the paper, the excess paint is scraped and the surface of the coating is smoothed. The difference is that the scraper coater is coated and scraped with steel scrapers. The advantage of the scraper coater is that the coating surface is very smooth, and is not affected by the surface state of the base paper. It does not require the soft and fluidity of the coating, and can be used for high solid content coating and high speed coating. The disadvantage is that when mixed with impurities coating At that time, Yi card leaves long marks on the edge of the paper, and the blade is easy to wear. It must be changed frequently. The coating can not be too thick, and the uniformity of the thickness of the base paper is also strict.