Transformer Insulation Materials
Craft Paper
Electrical insulating kraft paper from 100% sulfate insulating wood pulp
Electrical insulating kraft paper made from 100% premium sulfate insulating wood pulp, free of rubber and fillers, with even caliper for turn-to-turn and layer insulation in oil-immersed transformers.
Class A (105°C)Thickness 0.05 mmDensity 0.75–0.85 g/cm³
- Temperature class
- Class A (105°C)
- Thickness
- 0.05 mm
- Width
- 5–960 mm
- Test method
- QB/T4030-2010
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 | 0.05 (+0.004 / -0.002), measured 0.052 |
| Density | g/cm³ | 0.75–0.85 (measured 0.82) |
| Tensile strength MD / CD | kN/m | ≥4.05 / ≥1.08 |
| Elongation MD / CD | % | ≥2.00 / ≥4.00 |
| Conductivity of water extraction solution | mS/m | ≤5.0 |
| Ash content | % | ≤0.80 |
| Moisture content | % | 6.0–9.0 |
| Temperature class | — | Class A (105°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
- 100% premium sulfate insulating wood pulp, free of rubber and fillers.
- Even caliper and formation; pinholes, un-distributed come and particles kept within the safety scope of transformer and cable making practice.
- Supplied in rolls, sheets or die-cut pieces, with slitting and custom roll dimensions.
Applications
Turn-to-turn insulation in oil-immersed transformers, layer insulation in distribution transformers, and cable-paper applications.
Oil-Immersed TransformersDistribution TransformersSwitchgear & Electrical Equipment
Why it fits
The base paper for the whole oil-immersed system - raw or as the substrate for DDP and dotted AMA.
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.