ISO Certificated Polyimide Round Enamel Coated Magnet Wire
ISO Certificated Polyimide Round Enamel Coated Magnet Wire has better performance than all other types of enameled wires. Polyimide paint film has only abrasion resistance slightly worse than polyester and polyvinyl acetal enameled wires. In order to improve this performance, most of the current Use polyester imide and polyamide imide to prepare enameled wire, which can increase the solid content of the paint, but the heat resistance is somewhat reduced.
Polyimide insulation improves the service life at high temperatures. At 250¡æ, the service life of polyimide enameled wire is 10,000h, while that of silicone enameled wire is only 200¡«600h. Polyimide has outstanding advantages. The resistance to softening and breakdown, the enameled wire will not be broken down even if the metal wire damages the paint film at 310¡æ, while the softening and breakdown temperature of polyester enameled wire is only 200-220¡æ. The polyimide alcohol film has very good thermal shock resistance. The enameled wire is continuously wound on a rod of equal diameter and placed immediately at 400¡ãC. The insulation does not break. If the temperature is as low as -95¡ãC, it Sudden bending, the paint film does not crack, so polyimide enameled wire has good elasticity, after long-term aging at 250 ¡æ and 300 ¡æ, it will not lose its harsh bending resistance.
Polyimide has these excellent properties and is also suitable for making enameled rectangular wires. Since the rectangular wires are used to prepare large-scale motor windings, the edges of the enameled wires must be bent, and during operation, due to centrifugal force, insulation between turns will occur. With huge compressive stress, the insulation must not be punctured or damaged.