Laser scanning for assessment of the fiber anisotropy and orientation in the surfaces and bulk of the paper

作者：Mendes A de O^*; Fiadeiro P T; Costa A P; Amaral M E; Belgacem M N

来源：Nordic Pulp & Paper Research Journal, 2015, 30(2): 308-+.

DOI：10.3183/npprj-2015-30-02-p308-318

• Paper characterization
• Fiber distribution
• Anisotropy and preferential orientation
• Laser scanning
• Image analysis and processing

This work addresses the assessment of the anisotropy and orientation of the fiber distribution, at the surfaces and in the bulk of the paper sheet, using an optical system that works by laser scanning. In our experiments, the two parameters (anisotropy and orientation) were evaluated at a sub-millimeter level for five paper samples of different characteristics. As expected, the results that were obtained with the system were in agreement with the corresponding fiber distribution characteristics of each paper sample. Furthermore, the obtained results at the surfaces and in the bulk of the paper samples were also in agreement to each other having shown similar values for each analyzed sample. In terms of assessment, the implemented system offers the possibility of analyzing the paper samples by three different ways: image analysis, numerically, and through color graphical representations allowing a very complete analysis of the samples. The implemented system shows, therefore, to have potential to be used as a quality control tool to perform this kind of testing, and it is planned to be further explored for the study of the fiber distribution in the paper structure.

• 出版日期2015