6641 DMD Polyester Insulation Sheet for Motors The 6641 DMD polyester insulation sheet is a high-performance dielectric material specifically designed for electrical motor applications. Composed of a composite structure, it features a polyester film (PET) laminated with non-woven polyester fiber (DMD: Diaphragm-Material-Diaphragm), offering excellent electrical, mechanical, and thermal properties. This insulation sheet is widely used in motors, generators, transformers, and other electrical equipment to ensure reliable insulation and long-term operational stability. Key Features and Benefits 1. Superior Electrical Insulation The 6641 DMD sheet provides high dielectric strength, ensuring effective insulation between conductive components in motors. Its low dielectric constant and high volume resistivity minimize energy loss and prevent electrical breakdown, even under high-voltage conditions. 2. Excellent Thermal Resistance With a temperature rating typically ranging from 130°C to 155°C (Class B to F), this material maintains structural integrity and insulation performance under elevated temperatures. It resists thermal degradation, making it suitable for demanding motor applications. 3. Mechanical Strength and Durability The laminated structure of PET film and non-woven polyester fiber enhances tensile strength, puncture resistance, and flexibility. This ensures the sheet withstands mechanical stress during motor assembly and operation, including winding and vibration. 4. Moisture and Chemical Resistance The 6641 DMD sheet exhibits strong resistance to moisture, oils, and common industrial chemicals, preventing insulation failure in harsh environments. Its hydrophobic properties help maintain performance in humid conditions. 5. Dimensional Stability The material retains its shape and properties under thermal cycling, reducing the risk of delamination or deformation in high-temperature motor environments. Applications - Motor Slot Liners: Used to insulate stator and rotor slots, preventing short circuits. - Phase Insulation: Separates windings to avoid electrical contact. - End-Wedge Insulation: Protects coil ends from mechanical and electrical damage. - Barrier Insulation: Shields conductive parts in motors and generators. Conclusion The 6641 DMD polyester insulation sheet is a reliable solution for motor insulation, combining electrical safety, thermal endurance, and mechanical robustness. Its versatility and durability make it a preferred choice in industrial, automotive, and appliance motor manufacturing. By ensuring efficient insulation, it contributes to extended motor lifespan and reduced maintenance costs.