Patent ID: 6726958
Filing Date: 2004-04-27
Classification: B05C

Abstract:
A coating method of coating a coating liquid on a web-shaped support with a coater having at least one set of a slit and a pocket, comprising steps of:feeding the coating liquid having a viscosity &mgr; (PaÂ·s) to the coater in which the slit has a length Ls (mm), a gap h (mm); conveying the web-shaped support at a coating speed u (mm/s); coating the coating liquid on the conveyed web-shaped support with the coater so as to form at least one coating layer having a pre-dried layer thickness hw (mm) and a dried layer thickness hd; setting and adjusting slit length Ls, slit gap h, viscosity &mgr;, pre-dried layer thickness hw, and coating speed u to satisfy the following conditional formula 1Ã—104<12Ã—&mgr;Ã—LsÃ—hwÃ—u/h3&lE;4Ã—105; and setting a difference between the maximum value and the minimum value in dispersion of the gap of the slit &Dgr;h measured along the entire length of the slit to satisfy the following conditional formula:&Dgr;h&lE;hÃ—(&Dgr;hdmax/hd)3 wherein &Dgr;hdmax is a permissible maximum value (mm) among differences &Dgr;hd (mm) between the maximum value and the minimum value in the dispersion of a dried layer thickness hd (mm) measured along the entire width of the coating layer.