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| Study on the Enhancement Technology of Bamboo Chemi-mechanical Pulp Classifying Coupled with Long Fiber Fraction Refining |
| Received:August 29, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.01.015 |
| Key Words:bamboo chemi-mechanical pulp classifyng and grading PFI refining coupling reinforce paper properties |
| Fund Project:宜宾市揭榜挂帅科技项目（2022JB009）。 |
| Author Name | Affiliation | Postcode | | HUANG Nan | College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Key Lab of Paper Based Funvtional Materials of China National Light Industry, Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | XU Yongjian* | College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Key Lab of Paper Based Funvtional Materials of China National Light Industry, Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | DU Peng | College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Key Lab of Paper Based Funvtional Materials of China National Light Industry, Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | XIE Zhanghong | Yibin Paper Industry Co., Ltd., Yibin, Sichuan Province, 644109
Sichuan Province Engineering Technology Research Center of Bamboo Pulping and Papermaking, Yibin, Sichuan Province, 644109 | 644109 | | FANG Guigan | Jiangsu Key Lab of Biomass Energy and Material, Co-Innovation Center of Efficient Processing Utilization of Forest Resoureces, Institute of Chemical Industry of Forest Products, CFA, Nanjing, Jiangsu Province, 210042 | 210042 |
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| Abstract:This study obtained raw materials of various fractions by screening bamboo chemi-mechanical pulp and coupled long fiber fractions for PFI refining treatment. After refining， the long fiber fractions were mixed with untreated short fiber fractions in their original proportions for papermaking. The classification standards for long fiber grading were determined based on morphology， appearance， and water retention capacity. The changes in morphology， appearance， and water filtration performance of long fiber fractions after refining were studied， and the impact of the bamboo chemi-mechanical pulp screening coupled with long fiber fraction refining treatment on paper performance was analyzed. The results showed that the contents of R50 and P200/R400 fraction in bamboo pulp were 46.4% and 27.3%， respectively. The microscopic structures characterization indicated that the fiber morphology of R50 and P50/R100 fraction was incomplete with relatively smooth surfaces. After screening coupled with the refining of long fibers， with the number of PFI refining revolutions increased， the freeness of R50 and R100 pulp decreased， the water retention value increased， the average fiber length decreased， and the average width increased When the refining revolutions increased to 7 500 r， the content of fine fibers increased to 22.3% and 26.6%， respectively. With the increase in refining revolutions， the bulk thickness of R50 and R100 paper decreased， while the tensile index and tear index both increased. For R50-P50/R400 and R100-P100/R400 papers， the bulk thickness decreased， the tensile index increased， and the tear index first increased and then decreased. |
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