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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
Author NameAffiliationPostcode
SHI Menghua* Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414002 414002
DONG Chao Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414002 414002
LIU Chunjing Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414002 414002
LI Dan Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414002 414002
WEI Xinxin School of Chemistry and Chemical Engineering， Changsha University of Science & Technology， Changsha， Hu’nan Province， 410114 410114
WANG Yulong School of Chemistry and Chemical Engineering， Changsha University of Science & Technology， Changsha， Hu’nan Province， 410114 410114
DAI Yang School of Chemistry and Chemical Engineering， Changsha University of Science & Technology， Changsha， Hu’nan Province， 410114 410114
LI Yulin School of Chemistry and Chemical Engineering， Changsha University of Science & Technology， Changsha， Hu’nan Province， 410114 410114
WU Xuexun Hunan Refining New Material Technology Co.， Ltd.， Changsha， Hu’nan Province， 410221 410221
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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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