PEI Powder (Polyetherimide)
PEI (polyetherimide, trade name ULTEM) powder is supplied in free-flowing form for coating, sintering, and additive manufacturing applications. It offers inherent flame retardance, high strength, and dimensional stability at elevated temperature without post-treatment. Typical particle size ranges from 20 to 80 µm; grades and particle size are confirmed at time of quotation.
PEI Powder — Grades & Specifications
Polyetherimide (PEI) powder is supplied across a range of grades, particle sizes and morphologies. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Polyetherimide (PEI) |
|---|---|
| Category | High-Performance Engineering Plastic Powders |
| CAS number | 61128-46-9 |
| Melting / softening point | Amorphous polymer, no true melting point; glass transition (Tg) ~217°C |
| Particle size | Milled/micronized powder typically 20–80 µm |
| Morphology | Fine milled powder |
| Appearance | Amber to tan translucent powder |
| Max. continuous service temperature | Approx. 170°C continuous (short-term up to ~200°C) |
| Typical applications | Aircraft Interior Panels, Electronic Connector Coating, Medical Sterilization Trays, Automotive Under-Hood Parts |
Applications by Industry
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade or type
- Particle size (micron or mesh)
- Morphology / form (spherical, irregular, granular, etc.)
- Quantity
- Application environment
- Required delivery country
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What grades and particle sizes of PEI powder are available?
What particle sizes can you supply?
Can PEI powder be made to custom specifications?
What is the minimum order quantity (MOQ)?
Can you export and ship PEI powder internationally?
Do you provide a Certificate of Analysis (COA) or technical data?
Related Products
Request a Quote for PEI Powder
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.