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Paper Coatings: High Performance Composites?

Published online by Cambridge University Press:  16 February 2011

Pierre Lepoutre
Pierre Lepoutre*
Affiliation:
Pulp and Paper Research Institute of Canada, 570 St. John's Blvd., Pointe Claire, Quebec, Canada H9R 3J9
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Abstract

A pigmented paper coating is a composite material made of pigment, polymeric binder and microvoids. Its structure is designed to meet a difficult balance of optical, mechanical and fluid transport properties. The coating must be opaque and bright. It should withstand in-plane and out-of-plane stresses during calendering, printing, and converting operations. It should allow controlled movement of liquids and fluids during high speed printing and glueing.

The structure of paper coatings is examined and relationships between surface and bulk structural parameters and end-use properties are discussed. Namely, it is shown how pigment size and size distribution, its shape and orientation, the colloidal interactions between pigment and binder in the suspension all affect the final structure and properties. Finally, the profound influence of the porous network on the optical, mechanical and printing properties is emphasized.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 197: Symposium U – Materials Interactions Relevant to the Pulp, Paper and Wood Industries , 1990 , 279
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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