Explore our core collection of high-performance enameled conductors engineered to optimize electrical efficiency and thermal durability in heavy-duty commercial applications.
Polyester Coated Mild Copper Wire (often categorized as PEW under international industrial standards like IEC, NEMA, or JIS) stands as the workhorse of global electromagnetic conversion systems. By merging a highly annealed, pure soft-copper core with a customized, thin-film synthetic polyester insulation coat, this material delivers the optimal configuration of electrical conductivity, mechanical flexibility, and thermal endurance.
Our mild copper cores are processed through refined thermal annealing cycles to reduce yield strength and maximize ductility. This process prevents tension-induced fractures during high-speed winding processes, ensuring the conductor adheres tightly to complex stator and armature configurations without snapping or stretching the profile.
Modern applications demand wires that can withstand volatile thermal fluctuations and chemical stresses. Polyester coating layers provide excellent solvent resistance, resistance to typical refrigerants and transformer oils, and high dielectric breakdown strengths, making this product range the ideal standard for custom transformer and electric motor coils.
Suzhou Daiming Electrical Materials Co., Ltd. is a leading manufacturer specializing in high-grade enameled wires, including enameled aluminum, enameled copper, and copper-clad aluminum configurations. Operating on a sprawling 258,333.33 sq. ft. advanced production site, we host 30 modern production lines that operate under rigorous quality control standards.
Our engineering team holds over 10 years of specialized manufacturing experience, bringing deep material insights to every stage of fabrication. From wire drawing to multi-pass enamel baking, we ensure uniform paint layers, robust mechanical adhesion, and consistent dielectric integrity. Our strategic investments in manufacturing technology allow us to achieve scale efficiency, delivering bulk wholesale supplies to engineering partners globally.
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Our polyester coated mild copper wires are manufactured to meet precise chemical and physical boundaries. Review our standard parameters below.
| Property / Characteristic | Polyester Coated (PEW) Class 130 | Polyester Coated (PEW) Class 155 | Modified Polyester-Imide (EIW) Class 180 |
|---|---|---|---|
| Base Conductor Material | Soft Annealed Copper (Conductivity ≥ 100% IACS) | Soft Annealed Copper (Conductivity ≥ 100% IACS) | Soft Annealed Copper (Conductivity ≥ 100% IACS) |
| Enamel Coating Resin | Standard Polyester Film | Modified Polyester Base | Polyester-Imide Polymer |
| Maximum Working Temp | 130°C (Thermal Class B) | 155°C (Thermal Class F) | 180°C (Thermal Class H) |
| Heat Shock Resistance | 150°C for 2 Hours (No cracks) | 175°C for 2 Hours (No cracks) | 200°C for 2 Hours (No cracks) |
| Elongation Rate (%) | ≥ 30% (Diameter > 0.1mm) | ≥ 30% (Diameter > 0.1mm) | ≥ 32% (Diameter > 0.1mm) |
| Breakdown Voltage | Exceeds standard limits (Grade 1 & Grade 2) | High Dielectric Strength (> 5 kV) | Ultra-High Dielectric (> 7.5 kV) |
| Application Contexts | Home Appliances, Basic Motors | Generators, General Stators | Industrial Inverters, Automotive |
How regional manufacturing hubs integrate Polyester Coated Mild Copper Wire to drive localization, infrastructure upgrades, and system efficiency.
Used extensively in localized distribution grid transformers, small-to-medium electrical motors, and industrial solenoids. Provides stable magnetic flux and robust protection against insulation breakdowns during voltage spikes.
Core element inside hermetic compressors for air conditioners, washing machine dynamic pumps, refrigerator cooling fans, and high-efficiency ventilation blowers across residential sectors.
Highly integrated into robotics actuators, automated conveyor drive systems, precise sensors, and micro-electromechanical devices demanding repeatable torque and thermal tolerance.
Critical for local hydro, solar inverter, and wind turbine generator subsystems where continuous duty, environmental moisture resistance, and stable mechanical performance are required.
Why Daiming's polyester coated mild copper wires are chosen by top engineering brands for mission-critical electrification projects.
Our advanced concentric enamel extrusion nozzles ensure a highly uniform coating film. This eliminates uneven thickness zones that lead to early insulation breakdown under high dielectric stress.
Baked multiple times at controlled temperatures to build a tough outer barrier. The resulting enamel film exhibits strong abrasion resistance, protecting the copper during high-tension automatic coil winding.
We supply precise custom tolerances for micro-fine wires to large-gauge heavy profiles, ensuring optimal slot fill ratios in motor cores for high efficiency.
Backed by extensive raw copper inventories and continuous production, we offer reliable lead times for international projects and high-volume industrial pipelines.
The transition toward high-efficiency design has placed strict demands on magnet wire insulation. Here is how our engineering team is addressing these trends:
Standard polyester resins degrade at elevated temperatures due to polymer chain cleaving. By introducing imide rings into the polyester chain backbone (forming Polyesterimide or PEI), the thermal ceiling is elevated to 180°C and 200°C. This chemical formulation enables motors to operate at higher current densities without the risk of thermal runaway or insulation collapse.
Additionally, modern systems use an overcoat of Polyamide-imide (PAI) over the polyester-imide base (AI/EIW). This dual-film structure creates a resilient protective barrier against mechanical scuffing, chemical solvents, and high moisture levels.
The global automotive trend is moving from 400V propulsion units to 800V drivetrains to achieve faster charging and higher efficiency. However, high-voltage switching in inverter-driven motors causes transient voltage spikes that lead to partial discharge and corona damage in insulation systems.
To combat this, Daiming is refining nano-composite filled polyester coatings. These additives redistribute local electric field concentrations within the enamel layer, delaying the onset of partial discharge and extending motor operational life in modern electric vehicles.
Operating in Suzhou, a premier high-tech industrial hub in China, grants Daiming access to a fully integrated supply chain ecosystem. We source ultra-pure copper cathodes directly from top-tier domestic smelters. Our localized access to chemical suppliers, automated drawing machinery, and deep logistic networks enables us to offer competitive manufacturing costs, high quality, and swift delivery to global shipping ports.
Stay updated with the latest technological developments, logistics milestones, and materials research in our global industry.
As material price volatility affects global supply lines, enameled aluminum wire has emerged as a lightweight, cost-effective alternative for home appliances and specialized transformers.
Read More →Daiming has completed shipment of high-performance Continuously Transposed Conductors (CTC) to Turkey, supporting modernization efforts in Eurasian high-voltage power transmission networks.
Read More →High-voltage drivetrains demand enhanced insulation capabilities. Explore the requirements for partial discharge resistance in next-generation electric vehicle drive motors.
Read More →Answers to key technical questions from procurement departments and electromagnetic design engineers.
Explore our specialized flat wires, enameled aluminum series, and continuously transposed conductors for custom configuration needs.
Our technical support engineers are ready to assist you with wire diameter calculations, custom insulation specifications, and bulk international shipping inquiries.
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