Explore our high-performance thermal class conductor products. Every item incorporates advanced material engineering to guarantee continuous structural stability and dielectric reliability.
Suzhou Daiming Electrical Materials Co., Ltd. is a premier manufacturing hub specializing in high-performance enameled winding solutions, including enameled aluminum wires, enameled copper wires, and advanced copper-clad aluminum (CCA) enameled options. With decades of manufacturing expertise, we support massive industrial infrastructure demands by operating out of our expansive 258,333.33 ft² state-of-the-art production complex.
Our dedication to quality relies on 30 advanced production lines, integrated automation systems, and an unwavering commitment to international compliance standards. We test raw conductor materials and chemical formulations strictly, enabling our products to support global supply networks across North America, Europe, and the Middle East, while meeting thermal protection and efficiency demands.
In-depth technical whitepaper detailing structural advantages, polymer composition, and chemical resilience of class-leading EIW systems.
Polyesterimide (PEI) is a specialized polymer designed to provide exceptional thermal and dielectric characteristics. The polymer contains both ester links and stable imide rings within its main molecular chain. This structural design offers the processing benefits of polyesters alongside the high-temperature stability characteristic of polyimides.
When used as a coating for TIG (Tungsten Inert Gas) winding processes or high-speed automation systems, polyesterimide acts as a resilient insulation layer. During curing, the polymer crosslinks to form a tough film that resists chemical solvents, mechanical stresses, and high thermal loads.
Standard polyesterimide insulated wire (often classified as Class 180 or EIW) is engineered to run continuously at temperatures up to 180°C. It retains its physical properties without cracking or suffering dielectric breakdown, even when subjected to thermal spikes.
Its mechanical properties also include a low springback angle, strong paint adhesion, and high resistance to thermoplastic flow under pressure. This ensures the wire maintains its shape during tight winding operations, preventing short circuits in compact motor slots.
| Performance Metric | Polyesterimide (EIW) | Polyurethane (UEW) | Polyesterimide + PAI |
|---|---|---|---|
| Thermal Class | Class 180 (H) | Class 130/155 (B/F) | Class 200/220 (C) |
| Heat Shock Temp. | ≥ 200°C | ≥ 175°C | ≥ 220°C |
| Solvent Resistance | Excellent | Moderate | Outstanding |
| Cut-Through Temp. | ≥ 300°C | ≥ 200°C | ≥ 320°C |
How the evolution of automotive electrification and power transmission shapes high-performance winding requirements.
The global automotive market is rapidly shifting toward 800V electric drive systems to enable faster charging times and higher system efficiencies. This change subjects traction motor insulation to greater electrical and thermal stresses, along with voltage transients from fast-switching inverters.
Standard winding configurations can experience partial discharge issues under these conditions. Using polyesterimide-coated and polyamide-imide overcoated wires helps motors handle high-frequency surges and resist corona discharges, ensuring the long-term reliability of electric vehicle powertrains.
Modern power grids rely on advanced, high-efficiency distribution transformers. Systems like Continuously Transposed Conductors (CTC) help reduce eddy current losses. By insulating these configurations with high-temperature polyesterimide coatings, utility networks can operate reliably at higher power densities.
As copper prices remain volatile, manufacturing operations are turning to cost-effective alternatives. Copper-Clad Aluminum (CCA) and pure aluminum enameled wires provide lightweight, economical solutions without sacrificing electrical conductivity.
Daiming meets this global demand by producing high-volume Class 180 and Class 200 aluminum enameled wires. These products offer direct drop-in alternatives that help manufacturers lower raw material costs while maintaining component performance.
Why Tier-1 energy systems, industrial motor manufacturers, and transformer projects rely on Daiming Electrical.
Each spool of enameled wire undergoes inline laser checking to ensure uniform film thickness, high concentricity, and excellent dielectric performance.
Our EIW coatings feature high thermal index limits and strong resistance to thermoplastic cut-through under winding pressure.
We provide tailored dimensional matching, offering standard and custom conductor profiles in both round and flat geometries.
Backed by 30 high-capacity production lines, we ensure consistent manufacturing output and dependable delivery schedules for volume contracts.
Designed for clean energy applications, our low-loss winding conductors support high-efficiency motors and solar power inverters.
Delivering high-reliability enameled wire products for demanding operating conditions and demanding industrial requirements.
Our heavy-gauge enameled aluminum and copper wires provide thermal protection in large power distribution grids and industrial drives.
Provides compact, reliable winding profiles for home appliances, optimizing space utilization and improving thermal dissipation.
Designed for automated winding setups, featuring high tensile strength and flexible coatings to resist damage during manufacturing.
Supports wind turbines and solar power conversion systems, offering performance stability in demanding outdoor environments.
Ensuring our winding conductors meet strict regulatory demands and performance standards across international markets.
At Daiming, we maintain a comprehensive testing program spanning raw material inspection through to final product validation. Every production run is verified against international standards, including:
Our quality control labs monitor key mechanical and electrical values to ensure consistency. These tests include pinhole detection, springback angle measurement, thermal shock testing, and dielectric breakdown evaluation.
By documenting and verifying these performance characteristics, we ensure our winding wire products deliver consistent, reliable performance for critical industrial systems.
To support high-temperature power electronics and automated motor designs, we focus on continuous engineering improvements and product optimization.
Our material development program concentrates on upgrading insulation performance. By introducing nano-composite materials, we aim to improve thermal conductivity and corona resistance, preparing our products for future drive-motor systems.
Developing specialized additives for polyesterimide coatings to resist high-frequency voltage stresses in EV drive assemblies.
Refining extrusion tolerances for ultra-thin flat enameled wires to help electric motors achieve higher slot-fill ratios.
Optimizing copper-clad aluminum formulations to improve mechanical ductility and conductivity for dynamic winding layouts.
Keep up with our latest product shipments, market trends, and technological updates from the electrical insulation industry.
With the rapid development of new energy and high-end manufacturing in 2026, cost control and quality are paramount. Enameled aluminum wire emerges as the top cost-effective winding choice.
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Faced with operational challenges caused by raw material price fluctuations, copper-clad aluminum enameled wire becomes the preferred choice for cost reduction while maintaining conductivity standards.
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New Overseas Shipment News | High-quality CTC Continuously Transposed Conductors exported to Turkey, supporting core grid upgrades and long-term voltage reliability in the region.
READ MOREAnalyzing how automotive electrification affects winding wire requirements. EIW polyesterimide coatings and high-insulation materials become vital to handle higher voltages.
READ MOREReview engineering specifications, chemical properties, and procurement guidelines for polyesterimide coated winding wires.
Polyesterimide-coated wire features a high-temperature insulation layer derived from polyesterimide resins. Commonly rated as Class 180 or Class 200 (when combined with a PAI overcoat), it provides excellent thermal stability, chemical resistance, and dielectric strength for motors, transformers, and industrial solenoids.
While Polyurethane (UEW) offers direct solderability at lower temperatures (typically Class 130/155), Polyesterimide (EIW) delivers significantly higher thermal performance (Class 180/200) and greater chemical resistance. UEW is suitable for small electronic coils, whereas EIW is designed for heavy-duty industrial applications.
Combining a Polyesterimide basecoat with a Polyamide-imide (PAI) overcoat (EIW/AIW) provides a thermal class rating of 200 or 220. The PAI overcoat increases surface toughness, improves wear resistance during automated winding, and provides protection against moisture and chemical exposure.
Yes. We offer both standard round wires and customized flat/rectangular conductor options. Flat wires allow higher winding fill factors in transformer and traction motor slots, helping to increase overall energy density.
Our QC testing checks essential parameters, including wire diameter consistency, pinhole count, springback angle, flexibility, thermal shock resistance, cut-through temperature, and dielectric breakdown voltage. This ensures compliance with IEC 60317 and NEMA MW 1000 standards.
With 30 automated production lines in our 258,333.33 ft² facility, we maintain the capacity to support large, continuous manufacturing requirements. We coordinate logistics schedules to ensure reliable shipping and delivery for international buyers.
Explore our complete product catalog of class-rated winding wires, including enameled aluminum, copper, and composite conductors.
