(iii)Polyurethane enameled wire The thermal level is 130, 155, 180, 200(UEW) Advantages: Possess straight welding performance, high frequency resistance is fine. Easy coloring, wet resistance is also fine. Disadvantages: The mechanical strength is a bit weak, the theral resistance is low. The toughness and the adhesiveness of the large size wire is weak. The production of the enameled wire mostly is small and micro wire. Application: Widely used in household appliance, precision electronics, telecommunication and instrument. (iiii)Polyester imide/Polyamides compound enameled wire. Advantages: The impact of thermal resistance is fine, the breakdown of the thermal softening is high, the mechanical performance is fine. The solvent resistance and freeze resistance is also fine. Disadvatages: Easy to hydrolysis under close condition. Application: Used in electrical machine that require high thermal resistance, electrical instrumentation, electric tool. Power dry-type transformer winding, etc. (iiiii)Polyester imide/Polyamide imide The two kinds of insulating material is the main enameled wire that used in the China. The Thermal level is 220. Advantages: The thermal resistance of the product is high, also possess the performance of freeze resistance, low temperature resistance, radiation resistance, high mechanical strength, the stabilization of the electrically. The chemical resistance and the freeze resistance are fine. The overload capacity is strong. Application: Widely used in freezer compressor, air condition compressor, electric tool, explosion-proof motor, and the electrical motor which used in the circumstance of the high temperature, low temperature, radiation resistance, high load.