Technology for Bleaching Secondary Fiber from Waste Paper Grade MS-5B (Old Corrugated Cardboard, OCC). P. 201–210

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UDС

676.023.1

DOI:

10.37482/0536-1036-2026-1-201-210

Abstract

Currently, secondary fiber from waste paper, consisting of white types of paper, is subjected to bleaching for the production of sanitary and hygienic products. The aim of this paper is to investigate the possibility of bleaching secondary fibre from MS-5B waste paper (waste from corrugated and boxboard) for its use in the production of WLC boxboard with a white cover layer instead of the bleached sulphate pulp, which is used today. An analysis of literary sources has revealed that the bleaching chromophore groups with hydrogen peroxide is the most promising method for the secondary fiber from waste paper grade MS-5B. This method is more environmentally friendly compared to others, since its use does not involve the inclusion of chlorine-containing reagents in the process and requires less energy costs due to the absence of delignification. The study established the optimal technological parameters for bleaching: hydrogen peroxide concentration – 30 %, bleaching duration – 60 min, process temperature – 70 °C. However, at these technological parameters the whiteness increased only from 23 to 36 % with an improvement of optical properties without a significant decrease in the physical and mechanical properties, because bleaching had almost no effect on the morphology of the fiber. Using more "rigid" technological parameters led to an increase in the whiteness from 23 to 50 %, but at the same time, the strength properties of the fibres noticeably decreased. The lignin content reduced after bleaching under “rigid” conditions using TCF technology.

Authors

Filipp V. Lapaev*, Postgraduate Student; ResearcherID: MGT-7454-2025,
ORCID: https://orcid.org/0009-0008-1823-3597
Ludmila G. Makhotina, Doctor of Engineering, Prof.; ResearcherID: V-9090-2017,
ORCID: https://orcid.org/0000-0001-8784-967X

Affiliation

Saint-Petersburg State University of Industrial Technologies and Design, ul. Ivana Chernykh, 4, Saint Petersburg, 198095, Russian Federation; filipp.lapaev@inproec.com*, lusi_makhotina@mail.ru

Keywords

bleaching, secondary fiber, waste paper, hydrogen peroxide, liner with a white cover layer, white lined chipboard (WLC)

For citation

Lapaev F.V., Makhotina L.G. Technology for Bleaching Secondary Fiber from Waste Paper Grade MS-5B (Old Corrugated Cardboard, OCC). Lesnoy Zhurnal = Russian Forestry Journal, 2026, no. 1, pp. 201–210. (In Russ.). https://doi.org/10.37482/0536-1036-2026-1-201-210

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