PI Powder (Polyimide)
PI (polyimide) powder is supplied in free-flowing form for sintering, filtration media, and high-temperature coating applications. It offers extreme temperature resistance and dimensional stability beyond most other engineering thermoplastics, without a conventional melting point. Particle size varies widely by grade, from single-digit micron powders to coarser cuts; grades and particle size are confirmed at time of quotation.
No Sharp MeltMelting / Softening Point
1–10+ µmParticle Size Range
Custom Made-to-OrderGrade, Size & Quantity
WorldwideExport Shipping
PI Powder — Grades & Specifications
Polyimide (PI) 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 | Polyimide (PI) |
|---|---|
| Category | High-Performance Engineering Plastic Powders |
| CAS number | No single CAS number — polyimide covers a broad family of chemistries; commercial powder grades are proprietary formulations |
| Melting / softening point | Does not melt in the conventional sense; most fully-imidized grades resist softening under short-term heating to ~350°C |
| Particle size | Wide range by grade, from ~1–10 µm fine powders up to coarser mesh cuts |
| Morphology | Fine to coarse powder depending on grade |
| Appearance | Yellow to tan powder (black in filled grades) |
| Max. continuous service temperature | Approx. 232°C continuous (short excursions well above 260°C for some grades) |
| Typical applications | High-Temperature Filtration Media, Aerospace Thermal Insulation, Friction & Brake Materials, Semiconductor Process Components |
Applications by Industry
High-Temperature Filtration MediaPI powder is sintered into porous filter elements for hot-gas and industrial filtration systems.
Aerospace Thermal InsulationPI powder coatings and moldings insulate components exposed to extreme aerospace thermal cycling.
Friction & Brake MaterialsPI powder is compounded into friction linings for high-temperature braking and clutch systems.
Semiconductor Process ComponentsPI powder forms wear- and chemical-resistant parts used in wafer processing equipment.
Electrical Insulation CoatingsPI powder coatings insulate motor windings and electrical components in high-heat environments.
Protective Equipment FibersPI powder is processed into heat- and flame-resistant fibers and protective gear components.
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
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
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 PI powder are available?
PI (Polyimide) powder is supplied with particle size and grade as follows: Wide range by grade, from ~1–10 µm fine powders up to coarser mesh cuts Fine to coarse powder depending on grade. Other grades can be reviewed on request depending on your application and quantity.
What particle sizes can you supply?
Wide range by grade, from ~1–10 µm fine powders up to coarser mesh cuts Mesh-based requirements are also accepted; a mesh-to-micron conversion reference is provided on the page.
Can PI powder be made to custom specifications?
Yes. PI powder is produced to order — grade, particle size, morphology and packaging can be customized to your specification. Select “Custom Order” in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship PI powder internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots. Note: No single CAS number — polyimide covers a broad family of chemistries; commercial powder grades are proprietary formulations.
Related Products
Request a Quote for PI 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.