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EIW 180 refers to Polyesterimide (EI) enameled wire rated with a thermal class of 180°C. Known in industrial and electrical fields as a heavy-duty insulated magnet wire, it uses electrical conductor grade (EC) aluminum as its core material. It is coated with modified polyesterimide resins in multiple thin, highly adhesive layers and cured at high temperatures to form a resilient polymer sheath.
The dual-coat layout or specialized synthetic formulations allow the wire to resist thermal degradation under continuous operation at 180°C, with peak cut-through thresholds exceeding 240°C. In the industrial ecosystem, this insulation acts as a barrier preventing electrical shorts in high-vibration and chemically active systems.
Compared to standard polyurethane or lower-rated polyester magnet wires, EIW 180 offers superior chemical resistance to common solvents, transformer oils, and refrigerants, making it a robust choice for heavy industrial and power infrastructure projects.
| Thermal Class | Class H (180°C) |
| Base Conductor | Electrical Grade Aluminum (Purity ≥99.7%) |
| Insulation Film | Polyesterimide (EIW) |
| Standard Conformity | IEC 60317-15, NEMA MW 73-A, GB/T 6109.10 |
| Cut-Through Temp. | ≥ 240 °C |
| Breakdown Voltage | Dependent on wire diameter (Typical > 4.0 kV) |
Suzhou Daiming Electrical Materials Co., Ltd. is a major developer and manufacturer of specialized insulated magnet wires. We produce high-grade enameled aluminum wires, enameled copper wires, and copper-clad aluminum (CCA) enameled conductors for high-performance industrial applications.
Operating a sprawling 258,333.33 ft² manufacturing complex, our facility contains 30 state-of-the-art automated drawing and high-speed multi-pass baking lines. Our processes combine inline annealing, laser dimension monitoring, and automatic tension control. This enables us to maintain a consistent output that meets the quality requirements of global industrial distributors.
Our core engineering team averages over ten years of industry experience. They possess thorough knowledge of polymer insulation formulations, wire drawing dynamics, and international electrical standards.
We provide a comprehensive range of electrical conductors tailored for high thermal ratings, weight reduction, and custom dimensions.
Highly cost-efficient and lightweight magnet wire, optimized for high-temperature motor windings and dry-type transformers.
Offers premium electrical conductivity and mechanical toughness, suitable for heavy-duty electric motors and automotive dynamos.
Combines the conductivity of copper with the light weight of aluminum. A versatile material choice during copper price surges.
Continuously Transposed Conductors (CTC) built to minimize eddy-current losses in large-scale power transformers.
Every spool of Daiming wire is subjected to rigorous quality controls to ensure stable electrical insulation under load.
Every production batch undergoes high-voltage continuity spark testing and pinhole screening. This process guarantees a uniform and dense paint layer, ensuring dielectric performance in demanding configurations.
Our EIW 180 wire displays high resistance to heat shock and cut-through. The cured polyesterimide film resists mechanical cracking during high-tension, automated coil winding.
We offer custom manufacturing tolerances for specialized projects. Our technical team works with customers to match required wire gauges, insulation thicknesses, and spool sizes.
Our raw material supply chains and storage structures help ensure consistent manufacturing schedules. This stable setup allows us to fulfill large industrial orders on time.
We operate in compliance with modern environmental standards. Our facilities utilize thermal catalytic oxidizers to recover energy during solvent evaporation, lowering emissions.
Daiming EIW 180 and related conductor series are deployed globally to support critical electrical infrastructure and energy conversion.
An engineering analysis of material choices, design trade-offs, and cost structures in modern magnet wire procurement.
The choice between aluminum and copper magnet wire involves balancing weight limits, target electrical conductivity, and project budgets. EIW 180 enameled aluminum wire features a density of 2.70 g/cm³, roughly one-third that of copper (8.89 g/cm³). This weight difference makes it a useful choice for weight-sensitive applications like aerospace, automotive alternators, and portable generator coils.
While EC grade aluminum has approximately 61% the electrical conductivity of IACS copper, this difference is managed in transformer and motor designs by increasing the cross-sectional area of the conductor. The resulting coil is larger but remains significantly lighter than a copper equivalent, reducing mechanical stresses on motor bearings and structural supports.
From a procurement standpoint, aluminum wire provides cost stability. Copper prices are subject to global commodity market volatility. Incorporating EIW 180 enameled aluminum wire or copper-clad aluminum (CCA) options helps manufacturers stabilize material costs for large production runs.
Aluminum's lower density reduces the overall weight of rotating machinery and high-power transformers. This helps ease transportation logistics and installation requirements for industrial equipment.
The surface area-to-mass ratio of aluminum wires supports rapid heat dissipation. When paired with 180°C rated polyesterimide insulation, it maintains reliable performance under thermal cycles.
Aluminum offers a stable pricing structure compared to copper. This helps industrial OEMs manage manufacturing margins for high-volume consumer appliances and power components.
The electrical equipment industry is shifting toward higher system voltages to improve overall energy efficiency. Systems like electric vehicle drivetrains and large-scale industrial drives are moving from standard 400V designs to 800V and higher. This shift creates challenges for insulation materials, including increased risk of partial discharge and corona-induced degradation.
To address these conditions, Daiming is adapting its insulation methods. We are testing modified polyamide-imide (PAI) overcoats and incorporating inorganic nano-fillers into our EIW layers. These updates aim to improve corona resistance, thermal endurance, and mechanical stability in high-frequency winding environments.
Our material development focus includes developing flat enameled conductors. These flat designs offer a higher space factor than round wires, allowing design teams to reduce coil sizes while maintaining electrical output.
Stay updated on our international logistics shipments, technology updates, and project highlights.
As manufacturers look to manage production costs, high-performance enameled aluminum wire offers a functional balance of performance and budget stability.
Faced with raw material price changes, copper-clad aluminum enameled wire provides a practical option to help control production costs.
Our latest batch of high-quality CTC Continuously Transposed Conductors has been shipped to Turkey to support regional power grid infrastructure upgrades.
Technical answers to common questions about EIW 180 enameled aluminum wire applications and properties.
Browse our selection of specialized flat profiles, enameled copper wires, and transposed conductors built for power applications.
