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NOMEX®纸由美国杜邦公司在1965年发明,它是目前为全球所公认的高品质的绝缘材料。从化学角度来看，NOMEX®是一种芳香族聚酰胺。由于该材料的分子结构特别稳定，因此NOMEX®纸的优越性能即是由此产生的一个结果。当将之加工成各种片材后，其电学、化学和机械完整性极高,正确使用能够延长电力设备的寿命，减少过早的损坏及检修的次数，并可在难以预知电应力的情况下起到安全保护作用。
NOMEX®产品有许多不同的型号,主要是绝缘纸及合成纤维层压板，NOMEX®产品都具备恰当的性能平衡,适用于变压器、电动机、发电机以及其他电气设备。三十五年来，制造厂商都利用这种独特的性能平衡,提高了电绝缘的可靠性。
| 材料名称 | 型号 | 公称厚度 | 厚度范围 | 密度 | 延伸率﹪ | 拉伸强度Mpa | 介电强度 |
| mm | mm | g/cm3 | MD | XD | MD | XD | KV |
| NOMEX 410 | 2mil | 0.05 | 0.048~0.065 | 0.72 | 5.7 | 4.2 | 64 | 25.2 | 0.66 |
| 3mil | 0.08 | 0.068~0.09 | 0.80 | 6.9 | 5 | 70.2 | 32.4 | 1.38 |
| 5mil | 0.13 | 0.116~0.146 | 0.87 | 10.7 | 7 | 89 | 40.1 | 2.69 |
| 7mil | 0.18 | 0.161~0.201 | 0.94 | 13.7 | 9.7 | 102.3 | 53.6 | 5 |
| 10mil | 0.25 | 0.226~0.286 | 0.96 | 12 | 10 | 98.2 | 47 | 7 |
| 12mil | 0.3 | 0.280~0.333 | 0.99 | 15 | 11 | 105.2 | 55.5 | 8.6 |
| 15mil | 0.38 | 0.343~0.423 | 1.01 | 14.3 | 11.7 | 106.1 | 57.7 | 10.4 |
| 20mil | 0.51 | 0.466~0.554 | 1.05 | 14 | 10.3 | 101.7 | 57.9 | 13.8 |
| 30mil | 0.76 | 0.681~0.849 | 1.08 | 13.3 | 10.7 | 97.7 | 60.8 | 15.6 |
Type 410
Type 410 is the original form of Nomex® paper. Widely used in the majority of electrical equipment applications, it is produced in thicknesses from 0.05 to 0.76 mm (2 to 30 mil) with specific gravities from 0.7 to 1.2. As a high-density product, it offers high inherent dielectric strength, mechanical toughness, flexibility and resilience. Nomex® Type 410 is used in almost every known sheet insulation application.
Type 411
Type 411, a lower density version of Nomex® paper, it is available in thicknesses from 0.13 to 0.58 mm (5 to 23 mil), with a specific gravity of 0.3 and correspondingly lower electrical and mechanical properties. It is used in application such as motor phase insulation and transformer coil end filler, where high bulk and conformability are of prime importance, along with increased impregnability and saturability.
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