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ULTEM 1000 Rods — Isotropic and Excellent Toughness
Ultem 1000 rod is an amorphous, extruded from unfilled PEI with high glass transition temperature (Tg 217°C), excellent dimensional stability, and near-isotropic properties. It offers superior electrical insulation and can withstand repeated sterilization cycles, making it ideally suited for high-precision CNC machining.Typical applications include medical instrument components, semiconductor test fixtures, and high-temperature electrical insulators.
ULTEM 1000 rods key properties:
High-temperature resistant
1.Glass transition temperature: 215-217 °C
2.Heat distortion temperature: 192–201°C（1.8MPa）
3.Long-term using temperature: 170°C
4.Short-term using temperature: 200°C
Dimensional stability and low thermal expansion
As a non-crystalline material, the unfilled PEI material has a small anisotropy and the linear expansion coefficients in the flow direction and the perpendicular flow direction differ little.
ULTEM 1000 rods has Excellent insulation: within the frequency range of 1 MHz to 1 GHz, the dielectric loss of PEI remains extremely low (typically < 0.005). This means that in high-frequency signal transmission, signal attenuation and heat generation are both very small, making it highly suitable for 5G millimeter wave, radar, high-speed connectors and other scenarios.
Moreover, in a high-temperature environment of 150–200℃, the attenuation of its high-frequency insulation performance is also much smaller than that of PPS, PBT or epoxy resin.
If you are looking for a reliable insulating material that is not affected by high temperatures and frequency changes, then PEI resin material is very suitable for you.
PEI RESIN 1000 Electrical performance | Test Item | Test standard | Condition | Unit | Test Data |
Dielectric Strength | IEC 60243-1 | 2mm | kV mm -1 | 33 |
Comparative Tracking Index | IEC60112 | 23°C, 1kHz | V | 150 |
Dielectric Constant | IEC60250 | 23°C,50Hz | - | 2.9 |
| Volume Resistivity | IEC60093 | 23°C,1V | - | 1015 |
|ULTEM 1000 rods Size table
Why is there a dimensional tolerance on PEI rods?
The actual diameter of Ultem rods will be bigger than the diameter in table below,please contact us to measure the actual diameter for you.
| PEI 1000 ROD |
| Diameter MM | Tolerance | Density KG/M³ | Weight KG/M |
| 6 | +0.2-+0.6 | 1.27 | 0.04 |
| 8 | +0.5-+0.8 | 1.27 | 0.08 |
| 10 | +0.4-+0.6 | 1.27 | 0.12 |
| 12 | +0.3-+0.9 | 1.27 | 0.17 |
| 15 | +0.6-+1 | 1.27 | 0.24 |
| 20 | +0.3-+1 | 1.27 | 0.43 |
| 25 | +0.3-+1 | 1.27 | 0.72 |
| 30 | +0.4-+1 | 1.27 | 1.01 |
| 35 | +0.2-+1 | 1.27 | 1.4 |
| 40 | +0.2-+0.8 | 1.27 | 1.88 |
| 45 | +0.3-+1.5 | 1.27 | 2.33 |
| 50 | +0.4-+2.0 | 1.27 | 2.72 |
| 60 | +0.8-+2.0 | 1.27 | 4.08 |
| 70 | +0.5-+3.0 | 1.27 | 5.54 |
| 75 | +0.5-+3.0 | 1.27 | 6 |
| 80 | +0.5-+3.0 | 1.27 | 7.21 |
| 85 | +0.5-+2.0 | 1.27 | 7.35 |
| 90 | +0.4-+3.0 | 1.27 | 8.99 |
| 100 | +0.3-+2.3 | 1.27 | 11.05 |
| 110 | +0.6-+3.0 | 1.27 | 13.27 |
| 120 | +0.5-+3.0 | 1.27 | 15.7 |
| 130 | +0.5-+3.0 | 1.27 | 18.6 |
| 140 | +0.5-+3.0 | 1.27 | 21.5 |
| 150 | +0.5-+3.0 | 1.27 | 24 |
| 160 | +0.5-+3.0 | 1.27 | 28.2 |
| 180 | +0.5-+3.0 | 1.27 | 34.6 |
| Physical Properties | Units | Test | value |
| Density | g/cm³ | D792 | 1.28 |
| Water Absorption, 24 hrs. | % | D570 | 0.25 |
| Water Absorption, Saturation | % | D570 | 1.25 |
| Mechanical Properties |
| Tensile Strength | MPa | ISO527 | 110 |
| Tensile Modules | MPa | ISO527 | 3200 |
| Flexural Strength | MPa | ISO178 | 160 |
| Flexural Modulus | GPa | ISO178 | 3.3 |
| Hardness Rockwell M | - | ASTM D785 | 109 |
Coefficient of Linear
Thermal Expansion | cm/cm/°C | D696 | 5.6*10-5 |
| Glass Transition Temperature | ºC | D3418 | 210 |
| Thermal Conductivity | W/m-°C | ISO 8302 | 0.22 |
| Flame retardant | - | UL94 | V-0 |
| Electrical Properties |
| Volume Resistivity | Ω.cm | IEC 60093 | 1.E+15 |
| Dielectric Constant | @1.1 GHz |
| 3.01 |
| Dissipation Factor | @ 5 GHz |
| 3.02 |
| Surface Resistivity | Ω | IEC 60093 | 1.E+15 |
