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A medium-density aramid pressboard was prepared by using meta-aramid chopped fiber and precipitated fiber as raw materials, the effects of chopped fiber length, grammage of single pulp layer, and moisture content of paper billet on the properties of the aramid pressboard were studied. The conventional properties, compatibility, and processing performance of the aramid pressboard were studied. The results show that when the chopped fiber length is 7 mm, the grammage of single pulp layer is 64 g/m2, and the moisture content of paper billet is 63%, the aramid pressboard has excellent electrical and mechanical properties, good compatibility with synthetic ester transformer oil and silicone transformer oil, and good processing performance, which meets the application requirements of traction transformer and offshore wind power oil-immersed transformer.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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