Presspahn
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Description
Presspahn (Press paper) is a mixture of textile and cellulose fibers used for insulation purposes. Also called electrical insulating paperboard or pressphan, its component is unbleached sulfated cellulose. Presspahn has very good physical properties. Press paper is resistant to climatic conditions and is oil-resistant and heat-resistant. Pressphan is resistant to high voltage and a high capacity for impregnation with transformer oil.
Areas of application
- Electrical insulation products
- Transformers
- For oil transformers
- Cylinders
- Reels
- Others
Stock
| Supply variants | |||
| Thickness (mm) | Roll | Sheet | Sheet dimensions (mm) |
| 0.10 | • | х | |
| 0.20 | • | х | |
| 0.30 | • | х | |
| 0.50 | • | • | 1000/2000 |
| 1.00 | х | • | 1000/2000 |
| 1.50 | х | • | 1000/2000 |
| 2.00 | х | • | 1000/2000 |
| 2.50 | х | • | 1000/2000 |
| 3.00 | х | • | 1000/2000 |
| 3.50 | х | • | 1000/2000 |
| 4.00 | х | • | 1000/2000 |
Specifications
| Properties | Unit | Value | ||
| Thickness | mm | 0.20 | 0.25 | 0.50 |
| Thickness tolerance | % | ±10 | ±10 | ±10 |
| Density | g/cm3 | 1±1.2 | 1±1.2 | 1±1.25 |
| Tensile strength perpendicular/parallel | N/mm2 | 40/80 | 40/80 | 35/90 |
| Electrical strength (in transformer oil) | kV/mm | ≥55 | ≥55 | ≥35 |
| Moisture content | % | ≤8 | ≤8 | ≤10 |
| Properties | Unit | Value | |||||
| Thickness | mm | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 |
| Thickness tolerance | ± % | ±0.10 | ±0.10 | ±0.15 | ±0.15 | ±0.15 | ±0.16 |
| Tensile strength parallel/perpendicular | kgs/mm2 | 5.0/8.0 | 5.0/8.0 | 5.0/8.0 | 5.0/8.0 | 5.4/8.0 | 6.7/8.2 |
| Stress test perpendicular to the surface in transformer oil at 90±5 °C, applied for 1 min. | kV | 31 | 43 | 53 | 61 | 66 | 76 |
| Resistance to surface discharges per minute average/minimum | ≥14/≥10 | ≥14/≥10 | ≥39/≥34 | ≥29/≥27 | ≥29/≥27 | ≥36/≥28 | |
| Linear deformation – thickness -across – parallel | % | 5.0 1.1 0.8 | 5.0 1.1 0.8 | 3.3 0.7 0.6 | 3.9 1.0 0.6 | 4.1 0.9 0.6 | 3.9 0.8 0.6 |
| Ash content | % | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Density | g/cm3 | 0.95 | 0.98 | 1.03 | 1.03 | 1.04 | 1.03 |
| Moisture content | % | 8.0 | 7.1 | 6.7 | 7.2 | 8.2 | 5.8 |
| Oil absorbation | % | 15 | 20 | 23 | 23 | 22 | 25 |
| Compression of air under pressure | % | ≤12 | ≤12 | ≤12 | ≤12 | ≤12 | ≤12 |
| Relative electrical conductivity at water pressure at a modulus of 1:50 | MkCm/cm | ≤45 | ≤45 | ≤45 | ≤45 | ≤45 | ≤45 |
| Weight per 1m² | g | 1051 | 1583 | 2107 | 2682 | 3256 | 4307 |
