Explore our highly certified product lines optimized for high breakdown voltage, premium thermal ratings, and strict mechanical tolerances.
The global transition to decentralized renewable energy, electric vehicle (EV) drivetrains, and high-frequency power electronics has placed unprecedented demands on magnet wire insulation systems. Polyester wrapped metal wire (often integrated with PET, PI film, or polyester-yarn coatings) has emerged as the definitive standard for industrial systems operating under heavy thermal loads, volatile transient voltages, and aggressive mechanical stresses.
By wrapping fine-gauge or heavy flat conductor profiles (both copper and aluminum) with highly engineered polyester tapes or yarns, manufacturers can achieve superior slot fill factors while maintaining extreme resistance to dielectric breakdown. This is a critical requirement for designers looking to optimize transformer power densities and reduce core losses under continuous duty-cycle loads.
Note: Testing performed under controlled laboratory parameters at 50Hz, relative humidity 60%.
Suzhou Daiming Electrical Materials Co., Ltd. customizes multi-layered insulation paths across four key production paradigms.
Choosing the correct core metal combined with customized polyester wraps ensures that your product achieves optimal weight-to-power ratios. For example, our Enameled Transposed Conductors (CTC) reduce eddy current losses in large power transformers by continuously swapping individual insulated strands throughout the winding profile.
For applications where weight is critical, such as high-frequency aerospace inductors or specific automotive components, Copper Clad Aluminum (CCA) wire provides the lightweight benefit of aluminum with the lower contact resistance and ease-of-termination of pure copper.
Established as a pioneering force in the electrical winding wire sector, Suzhou Daiming Electrical Materials Co., Ltd. maintains a state-of-the-art production facility dedicated to the manufacture of premium enameled and wrapped magnet wires. Spanning a sprawling 258,333.33 ft² campus, our factory hosts 30 automated production lines equipped with laser diameter checking gauges, online pinhole detectors, and advanced curing ovens.
Our commitment to rigorous QA starts with raw material inspection (sourcing exclusively high-purity oxygen-free copper and electrical-grade EC aluminum) and carries through to final winding tests. Our technical teams, each backed by over ten years of industry experience, design insulation architectures that comply with international NEMA, IEC, JIS, and GB standards, helping companies around the world achieve maximum electrical reliability.
Advanced Production Lines
Sprawling Production Footprint (sq ft)
Cooperating Export Nations
A technical comparison highlighting how wrapped configurations outperform traditional enameled wire under extreme operating conditions.
Multi-layer polyester wraps provide redundant physical barriers that drastically lower the risk of voltage breakdown in high-voltage environments, such as EV power inverters or industrial transformers.
Our wrapping techniques utilize heat-sealed polyester tapes to prevent the insulation from thinning or shifting out of place during high-speed coil winding processes, ensuring excellent long-term durability.
We configure core wire geometries and wrapping thickness options (from 0.05mm to over 0.2mm) to match your custom magnetic slot space constraints, maximizing the copper/aluminum fill factor.
Leveraging raw material partnerships and highly integrated production lines in China, we offer stable pricing and shorter lead times to help you avoid supply disruptions.
Our production facilities utilize modern exhaust-combustion recovery systems that capture and reuse heat energy during the curing stages, significantly lowering carbon emissions per ton produced.
Every batch of wire undergoes continuous testing, including springback, elongation, breakdown voltage, thermal shock, and pinhole testing, in our ISO-accredited testing facility.
How global industries integrate our high-performance wrapped metal wires into their standard designs.
Polyester insulation improves durability against heat cycling in heavy-duty distribution transformers, maintaining efficiency under continuous operation.
Optimizes high-frequency switch-mode power supplies (SMPS) with lightweight aluminum or hybrid CCA magnet wires, helping keep device profiles slim.
Provides reliable signal and power winding components that can withstand constant vibration in robotics, pick-and-place systems, and harsh factory environments.
Ensures reliable, long-term performance in solar inverters, wind turbine generators, and large substation transformers, helping reduce energy losses.
Our manufacturing and testing processes are designed to meet strict international standards, ensuring smooth integration into your supply chain. Our operations are fully certified to ISO 9001:2015 for quality management and ISO 14001:2015 for environmental standards.
All finished products are RoHS and REACH compliant, and we provide complete test documentation (including dielectric breakdown, thermal indexing, and elongation logs) with every shipment. We also assist with international shipping logistics, providing ocean, air, and customs support to ensure your order arrives on time.
A look at the insulation technologies we are developing to support next-generation high-voltage electrical designs.
We are refining polyimide-polyester composite coatings to handle the fast switching speeds and voltage spikes common in 800V SiC (Silicon Carbide) automotive drive motors.
We are researching plant-derived resins for polyester wrapping tapes to help reduce carbon footprint while maintaining the electrical insulation performance of standard PET.
We are developing ultra-thin wrapping tapes that allow for tighter winding profiles and higher slot fill factors in compact, high-efficiency motors.
Technical answers to common questions about selecting, specifying, and installing polyester wrapped winding wires.
Polyester wrapped metal wire is an insulated conductor (copper or aluminum) wrapped with layers of polyester film (PET) or polyester yarn. This construction provides strong dielectric properties and high resistance to physical wear, making it popular in transformers, high-efficiency motors, and power supplies.
Polyester film wrapping provides higher dielectric strength, lower moisture absorption, and a thinner profile than paper insulation. This allows design engineers to build smaller, lighter electrical components that still handle high voltage effectively.
Our polyester wrapped wires are available in thermal classes ranging from Class 130 up to Class 220. This allows them to perform reliably in demanding high-temperature environments, such as traction motors and heavy-duty generators.
Yes, we draw and insulate high-purity copper cores as well as electrical-grade EC aluminum. We also offer Copper-Clad Aluminum (CCA) substrates to balance cost, conductivity, and weight.
We manufacture and test our products to comply with major international specifications, including IEC 60317, NEMA MW 1000, and JIS C3215. We also provide test reports with each order for tracking and quality control.
Yes, we can adjust the dimensions of the core wire and configure the polyester wrapping thickness (typically between 0.05mm and 0.20mm) to meet your specific motor slot or transformer coil requirements.
The wrapped polyester layers act as a mechanical buffer, protecting the core conductor and enamel coatings from tearing or abrasion during high-speed automated winding processes.
Standard production and shipping lead times generally range between 15 to 30 days, depending on order size and customization details. Our logistics team handles customs paperwork to facilitate import and export processes.
Stay informed with our latest updates, industry reports, and shipment news from Suzhou Daiming.
As raw material prices shift, electrical grade aluminum wire is becoming a practical choice for cost reduction in light-duty motor windings.
Copper-clad aluminum (CCA) enameled wire provides a balance of cost and weight for high-frequency transformer applications.
Our technical team has successfully shipped a batch of high-precision Continuously Transposed Conductors (CTC) to Turkey to support regional power grid upgrades.
Explore our additional magnet wire products, featuring various dimensions, wraps, and core materials built to international standards.
