Effect of Surface Sizing with Cationic Polymer Additives on the Coating Structure and Coated Paper Properties

양성고분자에 의한 표면사이징과 이에 의한 도공층의 구조 및 도공지 물성 변화

  • Jun, Dae-Gu (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, RIALS, SNU) ;
  • Lee, Hak-Lae (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, RIALS, SNU)
  • 전대구 (서울대학교 농업생명과학대학 산림과학부 환경재료과학, 서울대학교 농업생명과학연구원) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부 환경재료과학, 서울대학교 농업생명과학연구원)
  • Published : 2008.03.31

Abstract

It is essential to use base papers having proper surface characteristics in coating operation for improving coated paper quality and coater runnability. To fulfill these purposes, surface sizing of coating base stock with oxidized starch is commonly practiced. Use of cationic starch for surface sizing improves coated paper quality since cationic starch penetrates less into paper structure. The immediate objective of this study was to examine the influence of surface sizing with starch solutions containing cationic polymers on the rheology of coating colors and the effect on physical properties of coated papers. Changes of rheological characteristics of coating colors placed on the plastic substrate surface sized with cationic and anionic starch were determined. Results of rheological test showed that cationic polymer surface sizing agent increased electrostatic interaction with coating colors and increased storage modulus. This new technology of using cationic polymer as surface sizing additive was considered to be advantageous for base papers at low basis weights since it would improve the coverage and optical properties of coated papers.

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