Patent ID: 6500491
Filing Date: 2002-12-31
Classification: B05C,B05D

Abstract:
A coating method in which an extrusion coating head having a plurality of doctor edge surfaces is pressed onto a flexible support laid and running between pass rollers so as to coat said flexible support with a coating composition ejected from a slit, said method comprising the steps of:preparing a lower-layer coating composition so as to have a static viscosity of not less than 1P and a viscosity of not more than 50 cP at a shear rate of 10,000 secâˆ’1; excessively applying said lower-layer coating composition directly on an uncoated surface of said support; scraping a surplus of said lower-layer coating composition by said coating head so that a lower layer is formed; and applying an upper-layer coating composition, which is ejected from said slit, onto said lower layer, wherein respective coating compositions are prepared so that a difference in viscosity at a shear rate of 10,000 secâˆ’1 between coating compositions for layers adjacent to each other does not exceed 10 cP.