Patent ID: 6730359
Filing Date: 2004-05-04
Classification: B05C,B05D,G11B

Abstract:
A coating method in which a web which continuously runs is relatively pressed against an edge face of a coating head and a plurality of shear thinning coating liquids are discharged from a plurality of slits formed in the edge face in a direction of width of said web so that layers of the plurality of coating liquids are applied on the web in a wet-on-wet condition, wherein:viscosities of the plurality of coating liquids are adjusted so that a following inequality is satisfied, âˆ’15Ã—10âˆ’3nâˆ’1âˆ’&mgr;n<5Ã—10âˆ’3, where &mgr;n (PaÂ·s) is a high shear viscosity of the coating liquid forming an n-th (n&gE;2) layer from said web and &mgr;nâˆ’1 (PaÂ·s) is a high shear viscosity of the coating liquid forming an (nâˆ’1)-th layer that is adjacent to the n-th layer;wherein a thickness of a top layer is 1 &mgr;m in a wet state; and wherein the top layer of the coating liquid is applied on the web without removing a part of a bottom layer of the coating liquid having been applied.