Product Definition
The 200-class polyimide-F46 composite film wrapped copper round/flat wire (referred to as "sintered wire") is a special electromagnetic wire where polyimide-F46 composite film is tightly coated on the surface of copper conductors via high-temperature sintering process. After sintering, its insulation layer forms a seamless and dense integral structure, featuring excellent electrical, mechanical, and environmental adaptability. It is one of the core winding materials for oil-immersed/special motors and other equipment.
Core Specifications
- Product Models: MYFB (flat wire) / MF (round wire)
- Production Range:
Flat wire: 4～80mm²
Round wire: φ1.200～φ6.500mm
- Insulation Material: Polyimide-F46 composite film (FEP)
- Temperature Index: Class 200 (original standard) / Class 180 (H-class, common tolerance level in practical applications)
- Executive Standards:
Former standard: JB/T 6757-1993 (repealed in 2017)
Current standards: JB/T 5331-2011, customer-specific technical agreements
Performance Advantages
High Insulation Strength
The gap-free insulation layer after sintering, combined with the high dielectric properties of polyimide-F46, provides significantly better voltage resistance than ordinary wrapped wires.
Extreme Environment Adaptability
Oil-resistant, high/low temperature resistant (-60℃ to 180℃/200℃), radiation-resistant, and can withstand long-term oil-water erosion in closed environments.
Strong Structural Stability
The insulation layer is tightly bonded to the conductor after sintering, with high mechanical strength. It can withstand processing stresses such as winding and wire embedding, and is not prone to cracking.
Efficient Space Utilization
The flat wire design improves the winding filling factor in motor slots,
facilitating equipment miniaturization and energy efficiency enhancement.
Application Fields
Suitable for windings of electrical equipment with strict requirements for insulation and environmental adaptability:
- Submersible motors, oil-type motors (adapted to oil-immersed working conditions)
- Traction motors (rail transit, new energy vehicle drive systems)
- Dry-type transformers (high insulation strength requirements)
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