Functional Precoats for Multilayer Coating of Paper

摘要

In today's environment, improved cost performance is essential. In this paper we show how low levels of kaolin can improve precoat coverage and evenness through pilot coater evaluations of different precoat concepts on a fine paper basestock. We go on to explore the impact of precoat design on finished paper properties through a series of laboratory studies in which topcoat pigment selection and formulation was varied. We show that using optimised precoats can increase the degrees of freedom in topcoat formulation designfor' improving quality or reducing cost, while the same precoat kaolin can also bring quality improvements when used in topcoat in matt and silk applications.