Analysis of large-area coating uniformity of paper using scanning elec…
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The special form of paper (paper) is divided into printing paper, industrial paper, special paper, thermal paper, etc. according to its application, and is used as a special type of paper that meets the needs according to structure and coating on pulp that is the raw material of the paper. At this, the completeness of the paper is determined by how evenly the coating layer is coated on the pulp, and how the uniformity of this coating layer is evaluated and systematically managed is an old task of the paper company.
We analyzed the uniformity of coating by placing the surface of the coating in the electron microscope(SEM) without any sample preparing. Also, an area of up to 100mm2 was automatically measured to determine the uniformity of the coating layer and the coating surface. And for double check, after cross-sectional sample of paper by ion-beam milling device(Cross-section polisher), paper thickness and coating thickness were identified by scanning electron microscope(SEM) to cross-check the method of measuring large-area coating uniformity.
Through the analysis results, we wanted to find out how fast and easily the uniformity of coating layers can be assessed in large areas.