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In order to compare the thermal ageing properties and application characteristics of polyamide fiber paper commonly used for wire wrapping in the market, the thermal ageing properties in air, metal, and oil, oil absorption properties, and oil pollution properties of 2 mil aramid paper for wire wrapping from home and abroad were studied. The results show that the thermal ageing properties of three kinds of meta aramid paper in air are basically at the same level. When the aramid paper contacts with metal, the thermal ageing properties of the domestic aramid paper (2#) is significantly lower than that of foreign aramid paper (1#) and ZhuZhou Times Fiber Pioneer aramid paper (3#), the gap with the latter two is at least 15%, and the performance retention rates of the latter two are basically the same. After the aramid paper conducts thermal ageing in mineral oil (105℃), synthetic ester oil (130℃), and silicone oil (150℃) for 168, 336, and 504 h, respectively, the properties of three kinds of aramid paper do not decrease significantly. After the aramid paper is immersed in insulating oil, the oil absorption characteristics of three kinds of aramid paper are close, and there is no obvious pollution to oil, which indicates that the aramid paper has good compatibility with insulating oil. The research shows that the comprehensive performance of 3# aramid paper is better than that of 2# aramid paper, which indicates that 3# aramid paper can realize the domestic substitution of high level aramid insulating paper.
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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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