Conference proceedings article

Coating Microstructures : Binder Distributions

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Subtitle: Binder Distributions

Author list: Dahlström, Christina;Uesaka, Tetsu

Publisher: Tappi

Publication year: 2012

Start page: 250

End page: 257

Number of pages: 8

ISBN: 978-159510220-1


Abstract

Non-uniformities within the coating layer, such as porosity variations and binder distributions, are known to affect print uniformity and barrier properties. However, in the literature the results on coating microstructures are rather limited or sometimes conflicting.We obtained high quality images of coated paper cross sections using field emission scanning electron microscopy in combination with a new argon ion beam milling technique to directly observe and analyse the binder and pore distribution. This technique produces high quality images that allow microstructure characterisation of the coating layer.The binder distribution measurements showed that the binder is almost exclusively filling up the small pores, whereas the larger pores are mainly empty and depleted of binder.


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