Surface sizing with starch solutions at solids contents up to 18%

J. Lipponen*, J. Grön, S. E. Bruun, T. Laine

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

This study examined the surface sizing of uncoated fine paper with a metered size press at considerably higher starch solids contents than used conventionally. A broad range of rheological measurements of the studied starches and solids contents are presented also, along with a set of wet-film curves for various parameters of starch properties. Results from the study show that a wide variety of starch molecular weights can be used at increased starch solids content levels. Increasing the starch solids content, therefore, no longer is restricted to highly degraded starches only. An increased solids content in the starch solution reduces evaporation energy requirements, and less wetting of the paper web during sizing reduces the number of web breaks. Using high solids starch solutions also makes it possible to use the same surface treatment concept (e.g. same drying concepts and roll covers) for both sizing and coating operations.

Original languageEnglish
Pages (from-to)82-90
Number of pages9
JournalJournal of Pulp and Paper Science
Volume30
Issue number3
Publication statusPublished - 1 Mar 2004
MoE publication typeA1 Journal article-refereed

Keywords

  • Anionic compounds
  • Cationic compounds
  • Coating weight
  • Fine papers
  • Molecular weight
  • Paper properties
  • Rheological properties
  • Solids content
  • Starch
  • Surface sizing
  • Uncoated papers
  • Viscosity

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