INFLUENCE OF COATING PROCESS VARIABLES ON THE STRUCTURE AND INK ABSORBENCY OF MODEL CLAY COATINGS
Ink absorption is one of the major factors that affect printability of coated papers and boards. Conventional wisdom considers that ink absorbency is mainly affected by porosity or void fraction of the coating layer, which is in turn affected by binder content in the coating formulation. On the other hand, it has been found in this work that ink absorption depends not only on porosity, but also on drying conditions of the coatings. When dried under room conditions, ink absorption increased with increasing coating porosity, as observed in the literature. However, when dried at higher temperature with hot-air, ink absorbency increased with increasing solid content of the coating colors, or with decreasing coating porosity. This phenomenon is attributed to more pronounced latex migration under faster drying, leading to the formation of a more closed coating surface.
surface binder content porosity coating consolidation ink absorbency latex migration
Zang Yonghua Sun Jianting Du Juan Du Yanfen Xu Ying
Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, China
国际会议
广州
英文
1948-1951
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）