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Extremely good mechanical properties, most of all at high temperatures. Construction material for the aviation and space industry. Low thermal conductivity.
Closest relevant standards
IEC 60893:PI GC 301
NEMA LI 1:-
DIN 7735:-
This polyimide-based composite sheet (IEC PI GC 301) has extremely good mechanical properties, rated above all at high temperatures. It has low thermal conductivity and is also flame-retardant. It is used in various applications such as construction material in the aerospace industry, for thermal insulation plates in moulding tools and similar applications, where strict requirements to compression strength and thermal stability are key.
PI and EP 11 sit close together on paper: PI's temperature index (190°C) is only marginally higher than EP 11's (180°C), but they behave very differently as temperature rises: EP 11's mechanical properties fall off with heat, while PI stays remarkably stable. PI is also flame-retardant, which EP 11 is not. PI is considered best in class under temperature and ranks well above common epoxy-based variants such as G11 and FR5.
Also available as polyimide tube.
Suitable for electrical insulation and other electrical applications.
Suitable for applications where the materials are exposed to mechanical impact.
The material remains functional and retains its properties even at high temperatures.
The low thermal conductivity ensures the material has excellent heat-insulating properties.
| Mechanical properties | Test method | Thickness | Value | Unit | Note |
|---|---|---|---|---|---|
| Bending strength at RT | ISO 178 | ≥ 1,5 mm | 450 | MPa | *1 |
| Bending strength at a high temperature | ISO 178 | ≥ 1,5 mm | 360 | MPa | *E |
| Modulus of elasticity | ISO 178 | ≥ 1,5 mm | 25000 | MPa | *1 |
| Compressive strength | ISO 604 | ≥ 5 mm | 650 | MPa | *1 |
| Izod impact strength, parallel with layers | ISO 180/2A | ≥ 5 mm | 55 | Kj/m2 | *1 |
| Shearing strength, parallel | IEC 60893-2 | ≥ 5 mm | 55 | MPa | *1 |
| Tensile strength | ISO 527 | ≥ 1,6 mm | 300 | MPa | *1 |
| Electrical properties | Test method | Thickness | Value | Unit | Note |
|---|---|---|---|---|---|
| Electrical strength in oil at 90°C, perpendicular | IEC 60243-1 | 3 mm | 20 | kV/mm | *2 |
| Electrical strength in oil at 90°C, parallel | IEC 60243-1 | ≥ 3 mm | 60 | kV/25mm | *2 |
| Permitivity 50 MHz | IEC 62631-2-1 | ≤ 3 mm | 4 | *3 | |
| Permitivity 1 MHz | IEC 62631-2-1 | ≤ 3 mm | * | ||
| Dissipation factor 50 MHz | IEC 62631-2-1 | ≤ 3 mm | 0.01 | *3 | |
| Dissipation factor 1 MHz | IEC 62631-2-1 | ≤ 3 mm | * | ||
| Insulation resistance after submersion in water | IEC 62631-3-3 | All | 500000 | MΩ | *4 |
| Comparative tracking index | IEC 60112 | ≥ 3 mm | 250 | CTI | *1 |
| Physical and thermal properties | Test method | Thickness | Value | Unit | Note |
|---|---|---|---|---|---|
| Temperature index 20,000 h (T.I.) | IEC 60216 | ≥ 3 mm | 190 | °C | * |
| Fire class | IEC 60695-11-10 | ≥ 4 mm | V-0 | * | |
| Density | ISO 1183-A | All | 1.95 | g/cm³ | * |
| Water absorption | ISO 62-1 | 50x50x3 mm | 25 | mg | * |
| Smoke emission & toxicity | EN 45545-2; R22, R23 & R24 | * | |||
| Oxygen Index (OI) | EN ISO 4589-2 | % | |||
| Smoke density (Ds max.) | EN ISO 5659-2 | * | |||
| Smoke density (Ds max.) | EN ISO 5659-2 | * | |||
| Toxicity (CITNLP) | NF X 70-100-1/-2 | * | |||
| Toxicity (CITG, 8 min) | EN 17084 | * |
The above values are average values resulting from extensive tests in our laboratories. ELEKTRO-ISOLA A/S disclaims any and all liability for the performance of our materials in applications outside our control. Elektro-Isola A/S reserves the right to modify the above data without notice or further information. Furthermore, we refer to our general disclaimer.
* Note that color and surface are indicative. As this is a technical product, colour and expression may vary according to dimensions, batches and machining. If you want further information or have special decorative needs, please feel free to contact us.
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With more than 100 years of experience in the industry and a complete internal supply chain, we can offer you electrotechnical and mechanical thermosetting composites of the highest quality - whether you need tubes, sheets or parts machined to your specifications.
