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Spec: Apply to 2″ (50mm) to 4″ (100mm) With Knife edge Material: Polyimide – 360°C Continuous Using Special properties of Polyimide (PI)
PI-N, Natural (Unfilled) Polyimide, Highest elongation and purity.
PI-G15, Self-lubricating grade with 15% graphite filled.
Polyimide offers ease of machining and tight tolerances due to its inherent mechanical strength, stiffness and dimensional stability. Machining Polyimide isn’t too different from machining metals as a result of this; pretend you’re machining brass. Unlike metal, though, Polyimide (like all thermoplastics) will deform if you hold it too tightly.
We generally recommend Tungsten Carbide Alloy Tooling, although we recommend diamond tooling for large volume runs or work requiring close tolerances. Be wary of overheating Polyimide when you machine it. It shouldn’t become so hot that you can’t grasp it with your bare hands.
| PI – Polyimide | |||||
| Polyimide (PI) is a non melting high temperature polymer. Strength, dimensional stability, and creep resistance remain high even at temperatures above 360°C | |||||
| Properties | Temperature | Test Standard or Instrument | Unit | PI-N | PI-G15 |
| Physical Properties | |||||
| Color | – | – | – | Brown | Black |
| Density | – | GB1033 | g/cm³ | 1.38-1.42 | 1.42-1.45 |
| Mechanical Properties | |||||
| Tensile Strength | 23℃ | GB/T1040-2006 | Mpa | 85 | 89 |
| 260℃ | 49.4 | 54 | |||
| Elongation at Break | 23℃ | GB/T1040-2006 | % | 6.3 | 3.7 |
| 260℃ | – | – | |||
| Tensile Modulus | 23℃ | GB/T1040-2006 | Mpa | 3140 | 4400 |
| 260℃ | – | – | |||
| Flexural Strength | 23℃ | GB/T1040-2000 | Mpa | 110 | 137 |
| 260℃ | 60 | 99 | |||
| Flexural Modulus | 23℃ | GB/T1040-2000 | Mpa | 2990 | 4500 |
| 260℃ | 1640 | 3000 | |||
| Compress Strength | 23℃ | GB/T1040-2000 | Mpa | 135 | 124 |
| 260℃ | 83.8 | 100 | |||
| Compress Modulus | 23℃ | GB/T1040-2000 | Mpa | 1620 | 1600 |
| 260℃ | 1410 | 1400 | |||
| lzod Unotched Impact Strength | 23℃ | GB/T16420-1996 | Kj/m2 | 83.2 | 45 |
| 260℃ | – | – | |||
| Thermal Properties | |||||
| Coefficient of Linear Expansion | 296-573K | μm/m/°C | 53 | 49 | |
| Deflection Temperature | GB/T 1634.2 | ℃ | >360 | >360 | |
| Electrical Properties | |||||
| Surface Resistvity | GB1410 | Ω | 1014 | – | |
| Volume Resistvity | GB1410 | Ω.cm | 1015 | – | |
| Dielectric Strength | – | KV/mm | 22 | – | |
| Dielectric Constant | – | – | 3.6 | – | |
| NOTE: *The data stated above are typical values intended for reference and comparison purposes only. *The data should not be used as a basis for design specifications or quality control. *The information is provided as a guide to the best of our knowledge and given without obligation or liability. *Testing under individual application circumstances is recommended. | |||||
| * PI-N, Natural (Unfilled) PI | |||||
| * PI-G15, 15% Graphite Filled PI | |||||
Diyak Ltd. specializes in supply of various Engineering Polymer components and Oil Field equipment. Through internal growth, associations and acquisitions, Diyak Ltd. now offers a broad spectrum of products and services that encompass various industries about us.
