Guidelines for Designing Single-Layer and Multilayer Films

Abstract

Applying simultaneous multilayer coating technology, particularly slide and curtain coating, requires well-designed multilayer films that flow down on the inclined surface of the slide die and, in the case of curtain coating, through the curtain prior to being coated. These film and curtain flows must be optimized in terms of film thickness uniformity and fluid homogeneity because any flaws in these films will be transported through the coating process, and they will end up in the coated film where they deteriorate the uniformity of the final product. This chapter provides guidelines for designing singlelayer and multilayer liquid films.