Paper pigment coating process

Metso has set a new record for the speed of the global paper pigment coating process. At its Surface Finishing Technology Center in Finland, Metso Paper produced a new record of 3,150 m/min on the OpTiSp double-sided coating station of the test coater.

This Metso coating machine created this record when it was run on two simultaneous coating processes with two different coating amounts (ie 2 × 7 g/m2 and 2 × 8 g/m2). Nippon Paper Co., Ltd. specifically designed and produced a coating material with a basis weight of 41 g/m2 for the coating process, and the solid content of the coating was 65%. The OpTiSp ray of this experiment was the first coating station that applied weak impact coating technology at high speed. The principle of operation is to apply paint or glue directly to the surface of paper and board in a controlled manner, without any contact with the doctor blade, feed bar or coating roller. Due to the mature nozzle technology and unique design structure, the OpTiSp ray coating station ensures uniform coating coverage, high yields, and excellent runnability. This coating station is an important choice for retrofitting existing production lines into coated paper production lines.

Metso's Surface Technology Processing Center has a modern multi-functional test coater that can be used for almost all coating methods. These methods include sizing, surface coating, blade coating with a roller loading and nozzle feeding system, spraying and curtain coating. The center also has 2 test calenders equipped with the most advanced technology. For more than 20 years, they have successfully completed many large-scale comprehensive experiments. (Guo Caiyun)

Information Source: Paper Chemicals