Chapter 7. The Effect of Polymer Compatibility on the Binder Migration during Spray Drying

  1. William M. Carty
  1. Ungroo Kim and
  2. William M. Carty

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294734.ch7

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2

How to Cite

Kim, U. and Carty, W. M. (2002) The Effect of Polymer Compatibility on the Binder Migration during Spray Drying, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294734.ch7

Author Information

  1. Whiteware Research Center, New York State College of Ceramics at Alfred University, Alfred, New York

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375778

Online ISBN: 9780470294734

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Keywords:

  • polymer compatibility;
  • binder migration;
  • spray drying;
  • dry pressing;
  • whitewares industry

Summary

Granular feedstock for dry pressing is made by spray drying an aqueous suspension of ceramic powders and polymeric additives. The interactions between polymeric additives in suspensions or during drying are usually considered negligible. However, recent studies demonstrate that interactions between polymers usually do occur and can adversely afect product performance. In this study a binder in spray-dried granules, PVA, can be stained and its location within the spray-dried granule can be observed, verifiing the effect of other polymers (dispersants and plasticizers) on binder migration and case hardening of spraydried granules. The results also indicate certain additives that curtail binder migration, potentially eliminating case hardening in spraydried granules and the subsequent problems observed during compaction.