How does the ceramic coating blade improve the paper defects formed by blade coating

       In the production process of paper products, due to the difference in equipment, raw materials and paper types, the paper defects during blade coating are also different. Mainly summarized as scraper streaks, banner deviation, uneven coating, scraper turning over, micro-lines and other paper defects.



1. Scraper streak: Scraper streak is a strip-shaped indentation covering the paper surface. The size of the indentation varies, and it is divided into continuous scraper streak and intermittent scraper streak. These streaks are caused by large, hard agglomerated particles, such as fibers, coatings or web surface impurities, that get stuck under the doctor blade, causing the streaks to be drawn.



2. Banner deviation: A better coating banner is the basic requirement for the coating machine to have good runnability, and it is also the basic requirement for uniform coating effect and quality. The profile deviation is mainly reflected in the inconsistent coating amount between the middle and the edge of the paper web, or the local coating amount is deviated.



3. The scraper is turned over: the scraper is turned over because the speed of the scraper changes rapidly when the coating is lowered. The scraper must be avoided and controlled in production to ensure product quality.



4. Micro-lines: The width of the micro-lines is between 0.1-0.5, the paper web is brushed like a brush, the surface is clearly visible after coating, and sometimes it can still be seen after drying, if it occurs frequently and the micro-lines are deep , will have a great impact on the printing quality of coated paper.



So how to effectively improve these problems? Jinan Tianmeng New Material Technology Co., Ltd. and colleges and universities jointly developed a ceramic coating scraper. The main advantages of this type of scraper are:



1. Good wear resistance and long service life, generally 5-6 times that of steel knives.



2. High manufacturing precision and smooth surface, which can reduce the roughness of the paper surface and reduce the formation of scraper streaks.



3. Resistance to edge wear.



4. Continuous operation to improve the stability of paper quality.



5. Continuous operation, reduce paper breakage caused by tool change, reduce production time and increase output.



6. There is no running-in time, and the yield is improved.