Highly optimized enameled winding wires manufactured under ISO 9001:2015 controls. Click "View Detail" for technical specifications.
The transformation of global electrical infrastructure demands winding wires that can withstand higher voltages, elevated thermal stress, and aggressive environmental chemical factors. Polyester wire enamel coatings are at the epicentre of this development, acting as the fundamental micro-insulation layer protecting high-efficiency industrial motors, transmission transformers, and state-of-the-art vehicle power systems.
By using advanced chemical modifications—specifically THEIC-modified polyesterimide (EIW) and polyamide-imide (AIW) topcoats—manufacturers can extend the performance envelop of aluminum and copper winding wires up to 220°C. These advanced polymer coatings provide excellent mechanical durability, preventing pinholes and enamel crack propagation during high-speed automated winding processes.
As a premier supplier in China, Suzhou Daiming Electrical Materials Co., Ltd. addresses the dual challenge of resource optimization and thermal class optimization by offering tailored wire configurations. We support B2B clients in reducing materials weight (utilizing lightweight Enameled Aluminum or Copper Clad Aluminum Wire) without sacrificing critical insulation parameters.
Under the microscope: How polymer engineering establishes reliable electrical insulation under high thermal loads.
Features modified polyester containing imide rings to elevate thermal stability. Highly recommended for class 180 and 200 applications, providing superior resistance to heat shock and solvents.
Used as a secondary outer coat to yield exceptional mechanical robustness, resistance to chemical attack, and outstanding breakdown voltage integrity up to Class 220.
Tris(2-hydroxyethyl) isocyanurate is chemically integrated to cross-link the polyester network, significantly upgrading the polymer's thermal performance, flexibility, and adhesion properties.
| Insulation / Coating Type | Thermal Class Index | Breakdown Voltage (kV) | Primary Industrial Use Case | Compliance Standards |
|---|---|---|---|---|
| Polyester (PEW) | Class 130 / 155 | ≥ 4.0 kV | General power transformers, domestic appliances | IEC 60317-34, NEMA MW 5-C |
| THEIC-Polyester / Polyurethane | Class 180 | ≥ 6.0 kV | Automotive alternators, heavy-duty industrial relays | IEC 60317-8, NEMA MW 30-C |
| THEIC-Polyesterimide (EIW) | Class 200 | ≥ 7.5 kV | Fractional horsepower motors, traction motor windings | IEC 60317-13, UL Approved |
| Polyesterimide + Polyamide-imide (EIW/AIW) | Class 220 | ≥ 9.0 kV | Aerospace actuators, 800V EV drivetrains, wind turbine generators | IEC 60317-46, NEMA MW 35-C |
Founded on customer-centric design principles, we specialize in high-grade winding wire production. Located in a modern facility, we support the global supply chain with unmatched precision, robust raw material checking, and comprehensive post-curing inspections.
Why design engineers and purchasing managers globally partner with Daiming Electrical Materials.
Every spool undergoes online laser micrometer verification, guaranteeing coat concentricity and mitigating dielectric breakdown risks.
Outstanding cut-through and thermal overload performance ensures operations stay safe even under momentary over-current incidents.
We customize wire shapes (round, flat/rectangular), insulation thicknesses (Grade 1, 2, 3), and electrical resistance profiles to match specific winding cavities.
Our massive raw material reserves and optimized logistics safeguard your assembly lines from raw material price shocks and lead-time delays.
RoHS and REACH compliant enamel structures reduce ecological impact and guarantee hassle-free import clearance globally.
Enabling peak performance and efficiency across crucial global engineering sectors.
Stay updated on enameled wire technologies, copper and aluminum price trends, and manufacturing innovations.
With global raw material fluctuations showing no signs of stopping, engineering teams are pivoting towards enameled aluminum wire options. Modern polyesterimide class coatings guarantee that aluminum runs cooler and maintains insulation integrity while providing up to 40% weight reduction.
How Copper Clad Aluminum (CCA) wrapped in advanced polyester coatings acts as a direct substitute for pure copper in high-frequency transformer applications, keeping production budgets healthy while matching electrical throughput.
Daiming has successfully completed the dispatch of customized high-voltage continuously transposed conductors to Turkey. This dispatch highlights our capacity to meet large-scale infrastructure specifications overseas.
Zero tolerance for defects. Our testing laboratory performs checks throughout every manufacturing step.
Measures the curing quality of the polyester wire enamel. Proper curing ensures the wire coating won't soften under extreme, cyclical heat loading.
Using saltwater testing setups to detect microscopic breaks in the enamel sheath. Essential for long-term breakdown voltage stability.
Checks the mechanical flexibility of the coated copper or aluminum core to confirm it handles tight-radius automated winding without cracking.
Whether you need customized wire dimensions, specific thermal class enamels, or detailed UL certification documentation, our engineering team is here to assist.
Contact Our Technical Sales TeamGet clear answers to complex technical questions about wire enamel systems, class ratings, and ordering procedures.
Explore our specialized high-temperature enameled copper and aluminum lines. Optimized for complex industrial applications.
