Patent ID: 6638576
Filing Date: 2003-10-28
Classification: B05C,B05D,G03C

Abstract:
A method of bead coating a web using a coating die, the web and die being moveable relative to each other, the web being supported by a support, said method comprising the steps of:forming one or more layers of coating material using the coating die; allowing the one or more layers to impinge on the web as the web and die move relative to each other, the web surface having an average peak to peak roughness (Rz) as defined by DIN 4768, ISO4287 or BS 1134 greater than or equal to 2 &mgr;m and less than or equal to 20 &mgr;m, wherein the layer of coating material forming a wetting layer adjacent to said web has a viscosity of between 35 mPas and 200 mPas measured at a shear rate of substantially 10,000 sâˆ’1; and providing an electrostatic field at the point at which the one or more layers impinges on the web to stabilize the one or more layers of coating material.