Producing flexible calcium carbonate from waste paper and their use as fillers for high bulk paper

Microfibrillated cellulose (MFC) was prepared from post-consumer old corrugated container (OCC) material, which was first disintegrated in water, cleaned to remove impurities, and then fibrillated by grinding. Those processed MFCs were treated with in-situ formation of calcium carbonate by adding ca...

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Bibliographic Details
Published in:Bioresources 2023-05, Vol.18 (2), p.3400-3412
Main Authors: Kang, Lae Hyuk, Seo, Yung Bum, Han, Jung Soo
Format: Article
Language:English
Subjects:
Brightness
bulk
Calcium carbonate
Calcium oxide
Carbon dioxide
Cellulose
Cost control
Disintegration
Feasibility studies
flexible calcium carbonate (fcc)
highly loaded paper
Impurities
Laboratories
Lime
microfibrillated cellulose (mfc)
old corrugated container (occ)
Physical properties
Production costs
Pulp & paper industry
Pulp & paper mills
Smoothness
Stiffness
Tensile strength
Waste paper
Wood fibers
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Summary:Microfibrillated cellulose (MFC) was prepared from post-consumer old corrugated container (OCC) material, which was first disintegrated in water, cleaned to remove impurities, and then fibrillated by grinding. Those processed MFCs were treated with in-situ formation of calcium carbonate by adding calcium oxide and injecting carbon dioxide into the mixture up to the ratio of 1:40 (MFC : calcium carbonate) by weight. The MFCs had a dark brown color initially but turned into high brightness materials similar to commercial ground calcium carbonate (GCC) after the in-situ formation process. The MFCs that had calcium carbonate attached on their surfaces, which were lengthy and flexible, were called flexible calcium carbonate from OCC (FCCO). Paper containing FCCO gave higher bulk, higher stiffness, and higher tensile index without lowering smoothness when compared to the paper containing commercial GCC. However, brightness was slightly lowered because of initial low brightness of the OCC. This study also demonstrated the feasibility to substitute wood fibers up to 5% with FCCO without lowering essential properties for printing paper. Benefits of the waste paper are savings of both wood resources and production cost.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.18.2.3400-3412