| 摘要 |
PROBLEM TO BE SOLVED: To carry out the multi-layer simultaneous coating of an ink acceptive coating liquid at high speed without generating the defective coating caused by the heeling phenomenon, the air entrainment phenomenon or the like by specifying the surface roughness of a continously travelling substrate at the specified roughness and also specifying the viscosity of a coating liquid for a lowermost layer at the time of high shearing. SOLUTION: Coating liquids of two kinds or more are made to fall freely as a coating liquid film 2 by a slide curtain head 1 and impact crosslinked onto a web 5 as a continuously travelling substrate and applied thereon for coating. At that time, the angleαformed by the tangent to a backup roll 4 on a liquid contact section 3 and a coating liquid film 2 is set at 90 deg., and the distance L of bringing a web 5 into contact with the backup roll 4 is set at 3 mm or more in the travelling direction of the web 5 from the top of the backup roll 4 as a start point. Also the surface roughness of the web 4 is set at 0.1μm or more, while the viscosity of a lowermost layer coating liquid at the time of high shearing is set at 30 cPs or more to 300 cPs or less.
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