Premetered Coating Methods: Attractiveness and Limitations

This book compares premetered methods to self-metered processes and  addresses general properties of premetered methods. It presents specific  properties of slot, slide, and curtain coating. The book is divided in  three parts:

Part I compares premetered methods to self-metered  processes. It explains the term “premetered,” which is an expression of  the law of mass conservation, and discusses the physical fluid  properties that are relevant for premetered processes. Furthermore, it  presents in detail the various basic flow fields that make up premetered  coating methods. Lastly, it introduces the concepts of wall shear  stress, residence time, and hydrodynamic assist to dynamic wetting.

Part  II addresses general properties of premetered methods, such as the  fluid conditioning and delivery systems, the nominal film thickness, and  the film thickness uniformity, both in machine and cross-web directions  (die design). It lists the attractive features of simultaneous  multilayer applications, including an explanation of how mixing of  adjacent layers can be prevented. This section concludes by revisiting  examples of economic considerations.

Part III presents specific  properties of slot, slide, and curtain coating. It examines various  topics, such as coating equipment and coating configurations, coating  modes, details of the various flow fields, operating window and process  limitations, and process optimization.