Diamond dotted paper
Product information
It’s made of Kraft paper coated with heat curable epoxy resin . Diamond dotted paper used inoil-immersed transformers for the insulation between of coils. The color of resin is red or transparent.
The technical index as follows
| Specified Properties | Units | Standard | |||||
|
Thickness Tolerance |
inch | 0.003 | 0.050 | 0.070 | 0.010 | 0.015 | 0.020 |
| Mm | 0.076 | 0.130 | 0.180 | 0.250 | 0.380 | 0.500 | |
| Thickness tolerance(base paper) | % | ±10 | |||||
| Width tolerance | mm | ± 5 | |||||
| Apparent Density | g/mm^3 | 0.95 – 1.15 | |||||
| Tensile strength Min Machine direction |
N/mm2 |
70 | 70 | 80 | 80 | 80 | 80 |
| corss machine direction | 35 | 35 | 35 | 35 | 35 | 35 | |
| Elongation MD |
% |
2 | |||||
| CD | 4 | ||||||
|
Dielectric breakdown (volts/layer, dry |
volts |
750 |
1100 |
1400 |
2100 |
2900 |
3100 |
|
No pollution oil of transformer |
% |
Non pollution |
|||||
| Moisture Content | % | 4.0-8.0,all thickness | |||||
| PH water extract | % | 6.0-8.0, all thickness | |||||
| Ash Content Max | % | 1% maximum | |||||
| Bond Strength Min | kPa | 450 | |||||
| Coating thickness per side | mm | 0.006 to 0.012 | |||||
Remarks :
Thickness: 0.08mm, 0.13mm, 0.18mm, 0.25mm, 0.38mm, 0.40mm and 0.50mm
Normal width: 960±5mm, 1300±5mm
