Coating method and apparatus.

摘要

A coating method and a coating apparatus are constructed for simultaneously coating a plurality of different organic-solvent-based coating liquids each composed of a non-newtonian fluid having fine particles dispersed therein to form a multi-layered structure having three or more layers on a strip of continuously travelling non-magnetic supporting substrate with the aid of an extrusion type coating head. The coating liquids are instantaneously injected through the corresponding slits. The coating liquid for the lowermost layer is a non-magnetic liquid. The coated layers are successively formed one above another with the aid of a doctor edge plane located on the downstream side of each slit. The coating head is constructed such that each doctor edge plane does not pass a tangential line extending from the upstream end of an opening portion of each slit to a doctor edge of a slit located on the downstream side and that a coating liquid injected through a slit on the upstream side merges with a coating liquid injected through a slit on the downstream side while defining a predetermined merging angle therebetween. <IMAGE>