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| Effects of Fibrillated Softwood Pulp and Its Sieved Short Fractions on the Insulating Crepe Base Paper Properties |
| Received:January 19, 2026 Revised:February 10, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.07.013 |
| Key Words:insulating crepe base paper microfibrillated fiber sieving and grading paper microstructure strength property |
| Fund Project:中国南方电网有限责任公司科技项目（GDKJXM2022 2222）。 |
| Author Name | Affiliation | Postcode | | Gao Meng* | 1Electric Power Research Institute, China Southern Power Grid, Guangzhou, Guangdong Province, 510530 | 510530 | | Peng Lei | 2Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou, Guangdong Province, 510062 | 510062 | | Zhuo Ran | 1Electric Power Research Institute, China Southern Power Grid, Guangzhou, Guangdong Province, 510530 | 510530 | | Fu Qiang | 2Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou, Guangdong Province, 510062 | 510062 | | Zhao Linjie | 1Electric Power Research Institute, China Southern Power Grid, Guangzhou, Guangdong Province, 510530 | 510530 |
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| Abstract:In this study， the basic properties and fiber morphology of commercial insulating crepe paper were analyzed firstly. Softwood pulp was refined to 95 °SR as fibrillated softwood pulp (microfibrillated fiber)， and then sieved with a 200-mesh sieve to obtain the fractions with pore size 75 μm (microfibrillated fiber-short). The microfibrillated fiber and microfibrillated fiber-short were mixed with unbeaten softwood pulp for papermaking， and the effects of the addition amount on the papermaking process， microstructure and strength properties of paper were studied. The results showed that the addition amount of microfibrillated fiber and the microfibrillated fiber-short showed a significant impact on the microstructure and related properties of paper， with the microfibrillated fiber-short having a greater influence. When the addition amount of the microfibrillated fiber-short was 10%， the density of the paper was 0.57 g/m3， the air permeability was 5 μm/(Pa·s)， the average and maximum pore sizes of the paper were 1.9 μm and 4.7 μm， respectively. The tensile strength and tear strength could reach 4.62 kN/m and 1 403 mN， respectively， and the DC breakdown strength of the prepared oil-paper insulating material was 136 kV/mm. |
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