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Description
Aluminum/copper foil shielding paper is a new type of shielding insulating material, which is composed of high density insulating paper, high purity aluminum foil (copper foil) by using special adhesives and special technology. It is mainly used for the ground screen, electrostatic shielding layer and coil conductive layer of transformer, mutual inductor and reactor. It can improve the distribution of electromagnetic field, reduce partial discharge, strengthen insulation, reduce loss and improve safety and reliability. It is a new shielding material that must be used in domestic high voltage electrical industry.
Storage:
The product should be stored in a clean and dry place which above 300 mm above the ground.
Performance requirements:
|
No. |
Property | Unit | Demand | |||
| 6920-0.15/0.13/0.01-52 | 6920-0.23/0.20/0.02-25 | 6920-0.23/0.20/0.02-52 | ||||
| 1 |
Paper demand |
|||||
|
1.1 |
Thickness | mm | 0.13±0.01 | 0.20±0.02 | 0.20±0.02 | |
|
1.2 |
Density | g/m² | 1.0~1.15 | |||
| 1.3 | Ash | % |
≤1 |
|||
|
1.4 |
Conductivity of aqueous extract |
ms/m |
≤6 |
|||
|
1.5 |
PH of aqueous extract |
6.0~9.0 |
||||
|
2 |
Aluminum foil (copper foil) shield paper demand | |||||
| 2.1 | Thickness | mm | 0.15±0.01 | 0.23±0.03 |
0.23±0.03 |
|
|
2.2 |
Tensile
Strength (MD) |
KN/m |
≥20.0 |
|||
|
2.3 |
Elongation(MD) | % | ≥2.0 | |||
|
2.4k |
Electrical strength |
Inoil |
kV/mm | ≥55.0 | ||
| Inair |
≥6.0 |
|||||
