最新の紙塗工技術 ─マルチレイヤカーテンコータ─

抄録

Various types of coating methods are used in papermaking, depending on the product requirements. Film coaters are now widely used for on-line light weight coating (LWC). And blade coaters are widely used for producing coated fine paper and coated boards. However, the most recent innovations are noncontact coating methods such as spray coating and curtain coating. Simultaneous multilayer curtain coating, in particular, is attracting considerable attention for its capability to produce new grades of coated products. Here, the author provides some background on the conventional coating methods, and then introduces the simultaneous multilayer curtain coater (OptiLayer) developed by Metso Paper. In addition, the possible applications of OptiLayer are also described.