Starch penetration into paper in a size press

M. Shirazi, N. Esmail, G. Garnier, T. G.M. Van de Ven

Research output: Contribution to conferencePaper

3 Citations (Scopus)


One of the surface treatments of paper is surface sizing. In this operation hydrophobic polymers are added to paper in a size press, usually dissolved in an aqueous starch solution. We investigated the penetration of starch solutions in paper in a puddle size press. Starch penetration in paper was followed by X-ray microscopy. A mathematical model was developed which explains the observed penetration depths. The model is an extension of the classical Lucas-Washburn theory, modified by a build-up of pressure inside the sheet during liquid penetration. The model predicts liquid penetration as a function of paper speed, nip load, viscosity of sizing solution and porosity and surface chemistry of paper.

Original languageEnglish
Number of pages9
Publication statusPublished - 20 Nov 2003
Externally publishedYes
Event5th International Paper and Coating Chemistry Symposium 2003 - Montreal, Canada
Duration: 16 Jun 200319 Jun 2003


Conference5th International Paper and Coating Chemistry Symposium 2003


  • Paper
  • Size press
  • Starch
  • Surface sizing
  • Water penetration

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