THE FEATURES OF USE STRONGLY BASIC CATIONIC POLYELECTROLYTES IN THE PRODUCTION OF GLUED TYPES OF PAPER AND CARDBOARDS

UDC 676.2.046:544.6.018.47-036.5

Dashkevich Svetlana Arkad’yevna – Master’s degree student, the Department of Chemical Processing of Wood. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dashkevich@belstu.by

Gordeyko Svetlana Aleksandrovna ‒ PhD (Engineering), Associate Professor, Assistant Professor, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: sveta_gordeiko@mail.ru

DOI: https://doi.org/ 10.52065/2520-2669-2025-289-5.

Key words: coagulation, peptization, heteroadagulation, sizing, flocculation, hydrophobicity, strength, moisture resistance, paper, cardboard.

For citation: Dashkevich S. A., Gordeyko S. A. The features of use strongly basic cationic polyelectrolytes in the production of glued types of paper and cardboards. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2025, no. 1 (289), pp. 37–46 (In Russian). DOI: 10.52065/2520-2669-2025-289-5.

Abstract

The feature of the use of cationic polyelectrolytes (СP) in the production of glued paper and cardboard are their ability to participate in the processes of coagulation, flocculation, peptization, structure formation, bonding, hydrophobization and hardening. It is established that the nature of the processes depends on the method of application and the content of CP in dispersed systems. The production of glued types of paper and cardboard is based on the use of a modified rosin product (MRP), electrolyte (E) and CP. The properties of paper and cardboard and the degree of retention of the components of paper masses (fibers, sizing complexes and suspended solids) depending on the content of CP in dispersed systems when using it according to methods: 1) MRP – E – CP, 2) MRP– CP – E, 3) CP – MRP – E. It has been established that the most effective way of using CP is method 1 (MRP – E – CP). For the first time, the possibility of reducing the content of CP in a dispersed system from 0.20 to 0.02% of a. s. v. was studied. It is shown that the use of CP according to method 1 makes it possible to obtain high-quality types of paper and cardboard with high hydrophobicity and differing from known analogues in improved strength (by 18–25%) and moisture resistance (by 1.7–2.7 times). The use of CP increases the degree of retention of fibers from 94 to 97–98% and sizing complexes from 70 to 82–96%, and also reduces the content of suspended solids in recycled water by 3–12 times.

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15.11.2024