Abstract
It is meaningful to analyze the chemical distribution in coated layer to produce high quality coated paper, and there is clear relationship between chemical distribution in coated layer and paper quality such as gloss and intensity of the coated surface.Although many methods had been developed to analyze the chemical distribution in the coated layer, it is difficult to analyze the top surface of the coated layer, which affected on printability, by accepted methods.ESCA (XPS) can analyze chemical composition of top 50-100 angstroms of coated surface, and depth profile of chemical components in the coated layer can be provided in combination with scraping method. Natural binder (starch) and synthetic binder (SB-latex) were found to be separately by the method of labeled latex or spectrum treatment of photoelectron peak of carbon. Top surface profile of chemical distribution of the coated layer can also be provided with limitation on sample area of ESCA.Measurements of chemical distribution of the coated paper surface became possible with ESCA analysis, and differences of chemical distribution on surface and z-direction of coated layer in different coating condition can be detected clearly.
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