FUTURE PERSPECTIVES IN RECYCLING OF WET-STRENGTH PAPER CONTAINING POLYAMIDOAMINE-EPICHLOROHYDRIN RESINS

UDC 676.038:676.017.44

  • Penkin Anton Anatolʼyevich – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Chemical Wood Processing. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: penkin@belstu.by

DOI: https://doi.org/10.52065/2520-2669-2021-247-2-159-165

Key words: wet-strength paper, recycling, repulping aids, activated peroxosulfates.

For citation: A. A. Penkin Future perspectives in recycling of wet-strength paper containing polyamidoamine-epichlorohydrin resins. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2021, no. 2 (247), pp. 159–165 (In Russian).DOI: https://doi.org/10.52065/2520-2669-2021-247-2-159-165.

Abstract

This article presents analysis of trends in the secondary fiber market of Republic of Belarus with a focus on wet-strength recovered paper and effective methods of its recycling.

It is noted that the secondary fiber market is currently characterized by a high cost and demand for common types of waste paper. As the cost and demand for secondary fiber increases, paper made with permanent wet-strength polyamidoamine-epichlorohydrin (PAE) resins becomes an important source of fiber. Another characteristic feature of the secondary fiber market is the steadily increasing amounts of wet-strength paper waste, which currently includes such paper grades as tissue, security paper, paper for decorative laminates, base paper of wallpaper, oil and grease resistance wrapping paper.

Recycling of wet-strength recovered paper often require a use of oxidative repulping aids. Thermal and alkali-activated peroxysulfates (peroxydisulfates or peroxymonosulfate) are proven eco-friendly repulping reagents that effectively defibered wet-strength paper. It was found that a further increase in the efficiency of peroxysulfates or other peroxy compounds can be achieved by combining their thermoalkaline activation with chemical activators or co-oxidizers.

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