NOMEX paper covered wire has electrical, chemical and mechanical integrity, elasticity, flexibility, cold resistance, moisture resistance, acid and alkali corrosion resistance, and will not be destroyed by insects and mold. When the temperature of NOMEX paper-covered wire is not higher than 200℃, the electrical and mechanical properties are basically not affected. Therefore, even if it is continuously exposed to high temperatures of 220°C, it can be maintained for at least 10 years.