Polyetherimide (PEI) plastic is an advanced engineering thermoplastic widely recognized for its outstanding mechanical, thermal, and electrical properties. As industries continue to push the limits of performance, PEI stands out as a reliable material that meets rigorous requirements in high-temperature and high-stress environments.
What is PEI Plastic?
PEI is an amorphous, amber-colored thermoplastic developed primarily for applications requiring high strength, dimensional stability, and resistance to heat and chemicals. Unlike many other polymers, PEI exhibits consistent performance even under extreme conditions, making it a top choice for industries such as aerospace, electronics, medical devices, and automotive.
Key Properties of PEI Plastic Material
High Heat Resistance
PEI maintains excellent mechanical integrity at elevated temperatures. It has a glass transition temperature of approximately 217°C and a continuous use temperature of up to 170°C, making it ideal for components exposed to prolonged heat.Flame Retardant and Low Smoke Emission
Naturally flame-resistant without additives, PEI complies with UL94 V-0 standards and produces minimal smoke when exposed to fire, which is critical in aerospace and public transport applications.Superior Dimensional Stability
With low thermal expansion and minimal moisture absorption, PEI offers high precision and long-term stability, even in humid or fluctuating environments.Electrical Insulation
Its excellent dielectric strength and electrical insulating properties make PEI suitable for electronic components that operate under high voltage or high frequency.Chemical Resistance
PEI resists a wide range of chemicals, including acids, alcohols, and cleaning agents, allowing it to perform well in chemically harsh environments.
Available Forms of PEI Plastic
PEI plastic is available in several forms to suit different manufacturing and application needs:
PEI Sheets and Plates
PEI Rods and Tubes
PEI Films
PEI Granules (for injection molding and extrusion)
Custom CNC-machined PEI parts
Common Applications
Thanks to its broad property profile, PEI is used across a wide range of industries:
Aerospace: Lightweight structural parts, brackets, interior components
Electronics: Connectors, sockets, insulators, and high-performance circuit components
Medical: Sterilizable surgical tools, dental devices, diagnostic equipment parts
Automotive: Under-the-hood components, sensor housings, connectors
Industrial: Gears, valve components, high-temperature enclosures
Semiconductors: Wafer carriers, handling fixtures, cleanroom-compatible parts
PEI vs. Other High-Performance Plastics
Compared to other high-performance polymers such as PEEK, PPS, or PSU, PEI offers a unique balance of cost, thermal performance, and mechanical properties. While PEEK has superior chemical resistance, PEI provides similar strength and temperature performance at a more economical price point.
Why Choose PEI Material from Us?
Reliable Quality Control – All products are manufactured under ISO standards
Full Range of Grades – Unfilled, glass-filled, and carbon-filled options available
Custom Machining Services – Fast production based on your design drawings
Global Export Support – Professional logistics and international documentation
Technical Expertise – Material selection and performance consulting available
PEI plastic material is a top-tier solution for engineers and designers looking for durability, precision, and thermal resistance in critical applications. Its unique combination of properties allows it to replace metal and lower-performance plastics, resulting in lighter, safer, and more efficient components.
For more information, technical datasheets, or a free sample, contact our sales team today. We are your trusted PEI plastic supplier, committed to delivering performance and value in every application.
