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| Study on the Effect of Different Pulp on Air Permeability of Paper |
| Received:April 21, 2025 Revised:May 07, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.11.021 |
| Key Words:hemp pulp wood pulp air permeability pore structure fiber morphology |
| Fund Project:江西中烟工业有限责任公司科技项目（赣烟工科计2023-12）。 |
| Author Name | Affiliation | Postcode | | ZHANG Weitao* | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | TAN Mingjie* | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | WU Zixuan | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | XIA Chao | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | GU Chengcheng | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | YE Xiaying | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | LUO Wei | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | AI Yimin | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | ZOU Enkai | Technology Center, China Tobacco Jiangxi Industrial Co., Ltd., Nanchang, Jiangxi Province, 330096 | 330096 | | YANG Fei | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:In order to investigate the reason and mechanism for the difference in air permeability between hemp paper and wood paper， different hemp fiber raw materials (flax pulp and hank pulp) and wood fiber raw materials (hardwood pulp and softwood pulp) were used to prepare unfilled and filled with 10% calcium carbonate paper， respectively. Subsequently， the mechanism of the difference in air permeability performance were explored according to the analysis of the changes in the morphology of the fibers before and after beating， the distribution of the pore structures and surface morphology of the paper， in combination with the air permeability and bulkiness of the finished paper. The results showed that hemp pulp paper exhibited superior air permeability compared to wood pulp paper. Under both unfilled and filled with calcium carbonate conditions， flax pulp paper with superior air permeability exhibited values of 1.04 and 3.86 μm/(Pa·s)， significantly higher than that of hardwood pulp paper at 0.379 and 1.10 μm/(Pa·s). Furthermore， the main reason why the air permeability of hemp paper was better was that the looser fiber network structure of hemp paper. While the fibrillation degree of hemp fiber was lower than that of wood fiber in the beating process， resulting in the lower interweaving compactness level of hemp fiber， which might be the root cause of the difference in air permeability between hemp paper and wood paper. |
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