EVALUATION OF THE EFFECTIVENESS OF USING STARCHES IN THE SIZE PRESS OF A PAPER MAKING MACHINE

UDC 676.2.056-55

Gorzhanov Vadim Valer’yevich – PhD (Engineering), Аssistant Professor, the Department of PhysicalChemical Methods and Quality Assurance. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: horzhanovvadim@mail.ru

Herman Nataliya Aleksandrovna ‒ PhD (Engineering), Senior Lecturer, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: herman_n@belstu.by

Nikolaichik Irina Vladimirovna – PhD (Engineering), Senior Lecturer, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: nikolaichik.ira@mail.ru

DOI: https://doi.org/ 10.52065/2520-2669-2025-289-6.

Key words: modified starches, surface sizing, size press, surface tension force, dynamic viscosity contact angle.

For citation: Gorzhanov V. V., Herman N. A., Nikolaichik I. V. Evaluation of the effectiveness of using starches in the size press of a paper making machine. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2025, no. 1 (289), pp. 47–54 (In Russian). DOI: 10.52065/2520-2669-2025-289-6.

Abstract

The possibility of assessing the suitability of commercial products based on modified starches as compositions for surface treatment of paper in the size press of a paper machine without their direct application to paper is considered. The technique is based on the comparison of the time of penetration of the adhesive composition into the porous structure of paper calculated using the Lucas – Washburn relationship and the contact time of the paper web with the composition in the size press of the paper machine. The theoretical aspects of the paper surface treatment process are considered taking into account the design features of the size press, as well as the parameters determining the penetration of compositions into the porous structure of the paper web. It is shown that to assess the suitability of the composition, it is sufficient to determine only three parameters of the composition for surface treatment: surface tension forces, dynamic viscosity and contact angle with respect to the surface to which the composition is applied. These parameters are decisive in the process of surface treatment in the size press and are responsible for the amount of the applied composition. Commercial products based on oxidized and oxyethylated starches were used as samples in the experiment. The studies were carried out in the concentration range from 4 to 10%. The method can be used in selecting both the components of the composition for surface treatment of paper, taking into account their physical and chemical characteristics, and its concentration for specific types of paper. The use of the method will improve the controllability of the process and predict changes in paper properties in accordance with the goals of the enterprise, while reducing costs and time required to assess the results of introducing new products.

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15.11.2024