Preparation and investigation of unsupported multilayer coating composites concerning their in-plane stress-strain and bending characteristics, 2008 Advanced Coating Fundamentals Symposium

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In many converting processes, the material behaviour of coated paper and especially of its coating layers is responsible for paper quality performance. Quality imperfections of printed products addressed in this paper are coating cracking and fold cracking which can lead to expensive claims.

This study presents the results of a new methodology for preparation and testing of unsupported multilayer coating films concerning in-plane stress and bending behaviour. By applying the new methodology, multilayer coating composites were prepared and tested concerning material properties like e.g. E-modulus, in-plane stress-strain characteristics and bending characteristics. The influence of the synthetic binder (latex)-starch ratio and pigment type on the strength properties of unsupported single coating layers and multilayer coating composites was investigated.