Research on the Binder Distribution Depth and Evenness in Coated Paper

Abstract

In order to characterizing the binder distribution, Changed drying temperatures were used to alter binder distribution in coating drying process, which was used to investigate into the effect of drying condition on the binder distribution and characterize the binder migration in the method of numerical and visual analysis by Laser Scanning Confocal Microscope (LSCM). In this research, Rhodamine B was used to stain the binder and Rhodamine B was as the probe to characterize the z-directional distribution of the binder using LSCM. The results illustrated that it was a reliable and effective method to characterize the z- directional distribution of binder by LSCM. The result showed that the high drying temperature accelerated binder migration to the coating surface, however low drying temperature made binder migrate towards the interior of base paper. Moderate drying temperature is good to more even binder distribution and coating layer forming.