Transformer Insulation Materials
Semi-Conductive Crepe Paper
Black semi-conductive crepe paper for field grading and shielding, Class E
Black semi-conductive wrinkled paper made from insulating cable paper, with stable surface resistivity for field grading and shielding in high-voltage insulation. No delamination after 140°C kerosene vapour-phase drying.
Class E (120°C)Thickness 0.53 ±0.05 mmSurface resistivity <3500 Ω·cm
- Temperature class
- Class E (120°C)
- Thickness
- 0.53 ±0.05 mm
- Gram weight
- 110 ±5 g/m²
- Drying
- 140°C kerosene vapour phase
Request a quotation or a sample. Tell us thickness, width, temperature class, quantity and delivery form. We reply within one business day.
Technical data
| Property | Unit | Value |
|---|---|---|
| Thickness | mm | 0.53 ±0.05 (measured 0.493) |
| Gram weight | g/m² | 110 ±5 (measured 111.33) |
| Tensile strength | N/15 mm | >35 (measured 37.66) |
| Elongation, longitudinal | % | >55 (measured 61.33) |
| Conductivity of water extract | mS/m | <10 |
| Water extract pH | — | 6–8 |
| Surface resistivity, front | Ω·cm | <3500 |
| Volume resistivity | Ω·cm | <36000 |
| Temperature class | — | Class E (120°C) |
Values are typical values or ranges from our product data. Bulk supply is subject to the approved specification, sample and test report. If a parameter you need is not listed here, ask our engineers for the full test report for that grade.
Key features
- Insulating cable paper base with semi-conductive treatment for stable surface resistivity.
- Soft crepe structure for wrapping and conforming to irregular shapes.
- No delamination after 140°C kerosene vapour-phase drying.
Applications
Semi-conductive shielding and field grading in HV transformers, instrument transformers and bushings.
Instrument TransformersOil-Immersed TransformersSwitchgear & Electrical Equipment
Why it fits
Stops field distortion caused by surface defects on electrodes and conductor edges in high-voltage insulation.
Ordering information
To receive a quotation, please confirm:
- Product and grade
- Thickness and width (and roll or sheet size)
- Temperature class
- Quantity and delivery form (roll / sheet / die-cut / machined)
- Destination port and required delivery date
For machined parts, attach a drawing in PDF, DWG or STEP format. Datasheets, COAs and batch test data are available on request.
Related materials
Often specified together
Send your specification
Our export team reviews the application, the process and the existing specification before recommending a construction.