Polyimide film polyaramid fiber paper composite material (6650NHN) is a high-performance multilayer electrical insulation material designed for demanding applications that require exceptional thermal stability, mechanical durability, and long-term dielectric reliability. This NHN composite is manufactured by laminating high-quality polyimide film between two layers of polyaramid fiber paper, forming a uniform and flexible insulation structure that performs consistently under extreme conditions. Known for its class H thermal resistance up to 180°C, 6650NHN offers outstanding heat aging performance, excellent resistance to breakdown voltage, and stable insulating properties across a wide temperature range, making it ideal for modern electrical machinery that operates under heavy load. The polyimide film layer provides superior dielectric strength and dimensional stability, while the polyaramid paper enhances tear resistance, mechanical toughness, and impregnation characteristics, ensuring reliable performance during motor slot liner production, coil wrapping, transformer insulation, and high-temperature electrical component assembly. As a widely used insulation material in motors, generators, transformers, automotive electronics, rail transit equipment, high-voltage appliances, and industrial power systems, 6650NHN polyimide aramid composite insulation supports excellent oil resistance, chemical resistance, and corona resistance, enabling long service life even in harsh environments. It is also compatible with various varnishes and insulating resins, ensuring strong bonding and dependable electrical stability after vacuum pressure impregnation. With its smooth surface, uniform thickness, high flexibility, and easy processing characteristics, this composite material is suitable for automated slot insulation manufacturing and precision die-cutting applications. As industries move toward higher efficiency and miniaturization, polyimide aramid fiber paper laminated insulation such as 6650NHN becomes essential for ensuring safe and stable operation of high-speed motors, compact transformers, and thermal-intensive electrical systems. Whether used for motor slot insulation, interturn insulation, gasket materials, or high-temperature electrical assembly, 6650NHN delivers superior reliability and long-term insulation performance. For manufacturers seeking durable, heat-resistant, and high-dielectric composite insulation, 6650NHN remains one of the most trusted materials in the electrical insulation industry, offering consistent quality, strong mechanical reinforcement, and excellent thermal endurance.