PEI (Ultem)

PEI (polyetherimide), commonly known as Ultem, is an amorphous high-performance plastic valued for dimensional stability, heat resistance and electrical insulation. VantPoly supplies PEI resin, sheets, rods, film, 3D printing filament and machined parts for electrical systems, aerospace interiors, laboratory equipment and precision industrial components. Available colors, product forms and processing options can be selected around your application requirements.

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PEI (Ultem) material
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PEI (Ultem) Products

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PEI (Ultem) Material Selection Notes

Use this information to match product form and operating conditions before requesting a quotation.

Where PEI is commonly considered
PEI is often selected when a project needs a balance of heat resistance, stiffness, electrical insulation and predictable dimensions. It is commonly used for electrical housings, test fixtures, aerospace interior components, medical and laboratory equipment, and precision machined parts. Review heat exposure, electrical requirements, chemical contact and surface-finish needs before choosing a grade.

Available PEI product forms

PEI sheets, plates and rods
For machined fixtures, electrical insulation parts, housings, guides and structural components.

PEI resin and granules
For molding, compounding and product-development projects with defined processing requirements.

PEI film and 3D printing filament
For insulation, forming, additive manufacturing and lightweight component development.

Custom-machined PEI components
Produced from drawings, samples or critical dimensions agreed for the application.

What to include with a PEI inquiry
Include the required form, drawing or dimensions, quantity, application, service temperature, electrical conditions, contact media and any tolerance or color requirements. This makes it easier to identify a practical grade and manufacturing route.

PEI material selection notes
PEI can be a practical option where dimensional stability and electrical insulation matter, but PEEK, PPS, PSU or PPSU may be more suitable for other processing or service conditions. Compare the full operating environment rather than one property alone.

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