Latest experiences of film coating

LATEST EXPERIENCES OF FILM COATING AND INTRODUCTION OF A NEW CONTACTLESS OPTISPRAY COATING METHOD Metso Paper Inc., Coaters and Reels, Wärtsilänkatu 100, 04400 Järvenpää, Finland coating, MSP, layout, C2S, 2C1S, runnability, misting, web stealing, base paper, coating coverage, spray coating, paper quality The recent announcements of new high-speed film coating capacity in Europe have caused a lot of interest in the coating technology. The MSP technology is quickly becoming the leading process especially in LWC production. Furthermore, the choice of layout, e.g. C2S or 2C1S, for high-speed coating is also offering new alternatives since C2S is now introduced even at high machine speeds. As the result of years of intensive development work and customer cooperation, Metso Paper has developed its new coating technology to the market. The coating process is based on a controlled, high-pressure spray application of coating or surface size directly on to the surface of paper or board without any direct machine contact. Spray coating is able to achieve an excellent coverage of the base paper. The spray-coating station can be situated flexibly on the paper machine. The process will significantly lower running costs as cheaper raw materials can be used maintaining still high production efficiency, because the contactless process allows for lower machine directional paper strength. The new technology can be used for high speed coating and for a wide coatweight range. 1 LATEST EXPERIENCES OF FILM COATING Today, we can look back at a tremendous development of the Metered Size Press (MSP) technique, which took it far beyond its original target. The initial aim was only to solve speed problems related to pond size presses. But since then, the MSP technique has proven possible to be adapted for coating of both paper and board grades. Until the recent years, the coating concepts for high-speed papermaking lines