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Study on the Deinking Performance of Porous Calcium Silicate-filled Munken Paper |
Received:May 28, 2022 |
DOI:10.11980/j.issn.0254-508X.2022.07.006 |
Key Words:porous calcium silicate munken paper deinking performance ink removal rate high bulk |
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Abstract:In this study, physical properties of porous calcium silicate were analyzed, and the deinking performance of porous calcium silicate-filled munken paper was studied. The results showed that the porous calcium silicate with a honeycomb structrue was of low density, large specific surface area, high porosity and brightness, and low abrasion; the porous calcium silicate-filled munken paper showed good deinking performance with high pulp brightness increase, and ink removal rate, residual ink concentration and deinked pulp brightness increase after flotation deinking were 84.3%, 159.9 mg/kg and 17.1%, respectively, significantly higher than those of (PCC) counterpart (corresponding to 68.9%, 230.2 mg/kg and 10.4%, respectively); however, the deinked pulp reject rate of the porous calcium silicate filled munken paper was slightly higher than that of the PCC filled munken paper, which were 3.44% and 2.32%, respectively; the handsheet analysis showed that the deinked pulp of porous calcium silicate-filled munken paper had higher bulk, breaking length and folding endurance strength, which was beneficial to producing high-bulk and high-strength paper. |
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