Advanced Zenimid™ Polyimide Varnish
What is polyimide varnish?
Polyimide varnish is a high-performance coating material formulated from polyimide resins, widely used to create durable insulating layers in demanding industrial applications. Known for its exceptional thermal stability, polyimide varnish can withstand extreme temperatures while maintaining its mechanical, chemical and electrical properties. This specialized coating is commonly applied to components in electric vehicles, aerospace systems, and semiconductor devices, where reliable insulation and long-term performance are critical.
As an advanced insulating layer solution, polyimide varnish offers outstanding electrical insulation, chemical resistance, and adhesion to various substrates, including metals and composites. Its ability to form a thin, uniform coating makes it ideal for protecting sensitive electronic components and enhancing system efficiency. With increasing demand for high-performance materials, polyimide varnish coatings play a key role in enabling innovation across industries that require robust, heat-resistant, and electrically insulating materials.
Zenimid™ Polyimide Varnish: A Keystone in Electric Mobility and Semiconductor Excellence
In the rapidly evolving electric vehicle (EV) sector, our polyimide varnishes stand out by combining outstanding thermal stability and excellent electrical insulation, allowing for the minimization of insulation thickness for improved economics and maximum energy density in electrical motors. Our PI varnishes have been used successfully for several years in the world’s first pure 800 V EV platforms. In 400 V EV, Zenimid™ polyimide varnishes allow downsizing of the insulation thickness.
Semiconductors and Beyond: A Broad Spectrum of Applications
For the semiconductor industry, our highly thermal-resistant and adhesive polyimide varnish is essential. It ensures electrical insulation and adhesion during the manufacturing process, serving major semiconductor clients globally. Furthermore, our Photosensitive Polyimide (PSPI) is paving the way for advancements in semiconductor technology.
Zenimid™ Polyimide Varnish: Ultra High-Performance Material
We provide Zenimid™ Polyimide varnish solutions for a broad range of applications, from machinery and display to semiconductors and the aerospace industry. Zenimid™ Polyimide varnish is the material of choice for applications in harsh environments requiring extreme material performance.
Zenimid™ Polyimide Varnish's Key Properties:
 |
 |
 |
Mechanical & Electrical Properties |
Advanced Thermal Properties |
Superior Long-Term Storage Stability |
|
Polyimide varnish maintains excellent electrical insulation (low dielectric constant), tensile strength, and abrasion resistance over a wide range of temperatures, owing to its extremely high glass transition temperature (typically above 360℃). |
With a decomposition temperature of 560℃ or higher, PI varnish’s non-melting properties can preserve dimensional stability during the heat treatment process at extreme temperatures. Polyimide varnishes typically exhibit a Temperature Index of 240°C or above per ASTM D 2307 (Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire) required for 800 V EV motors. |
Our PI varnish maintains stable viscosity at room temperature and can be used long term if kept in refrigerated storage. |
