Description

Polyetherimide (PEI) is a high-performance, amber-colored amorphous thermoplastic renowned for its exceptional thermal stability, mechanical strength, and inherent flame retardancy. This material matters because it provides a critical balance of properties—including excellent electrical insulation, chemical resistance, and dimensional stability—where metals or other plastics fail. It is essential for engineers and manufacturers in the aerospace, automotive, electronics, and medical device industries who require reliable components that perform under extreme conditions.

Application

• Aerospace Components: Used in aircraft interior panels, ducting, and structural brackets due to its high strength-to-weight ratio and flame, smoke, and toxicity (FST) compliance.
• Electrical & Electronics (E&E): Ideal for circuit board insulators, connectors, and chip carriers because of its excellent dielectric properties and resistance to solder heat.
• Automotive Under-the-Hood Parts: Employed in sensor housings, throttle bodies, and transmission components for its heat resistance and durability.
• Medical Sterilization Trays and Devices: Chosen for its ability to withstand repeated steam autoclave and gamma radiation sterilization cycles.
• High-Temperature Industrial Components: Suitable for gears, bearings, and seals in demanding mechanical and chemical processing environments.
• Food Service and Handling: Used in microwaveable cookware and commercial food processing equipment for its thermal stability and compliance with food contact regulations.

Basic Information

Product Name	Polyetherimide
CAS No.	61128-46-9
Molecular Formula	(C37H24O6N2)n
Molecular Weight	Varies (Polymer)
Synonyms	PEI; Polyetherimide resin; Ultem® (Trade Name); 1,3-Isobenzofurandione, 5,5'-[(1-methylethylidene)bis(4,1-phenyleneoxy)]bis- polymer with 1,3-benzenediamine; Poly[2,2'-bis(3,4-dicarboxyphenoxy) phenylpropane-2,2-diylbis(imide)]; Thermoplastic Polyimide; Amorphous Polyimide
EINECS	262-610-9

Quality Control

Our Polyetherimide is manufactured under stringent process controls to ensure batch-to-batch consistency and high performance. Quality is verified through a comprehensive suite of tests including intrinsic viscosity, thermal analysis (Tg, HDT), mechanical property assessment, and flammability rating. We provide full traceability and Certificates of Analysis (COA) with each shipment, confirming compliance with relevant industry specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. As a hygroscopic polymer, it is recommended to dry the resin prior to high-temperature processing to prevent hydrolysis and maintain optimal properties.

Specification

Item	Specification
Appearance	Amber pellets or powder
Glass Transition Temperature (Tg)	217 °C
Density	1.27 g/cm³
Tensile Strength	> 100 MPa
Flexural Modulus	> 3.0 GPa
Heat Deflection Temperature (HDT)	> 200 °C @ 1.8 MPa
Flammability Rating (UL 94)	V-0
Dielectric Strength	> 20 kV/mm
Moisture Absorption (24h)	< 0.3 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.