Description
Electrical Aluminum foil(copper foil)shielding insulating paper is a new type of shielding insulating materia a made of high density insulation paper and high purity aluminum foil(copper foil)by special bonding process.Mainly used for transformers、mutual inductor and the ground screen、electrostatic shielding layer and coil conductive layer of reactor.It can improve the electromagnetic field distribution,reduce partial discharge、strengthen insulation、reduce loss、and improve its safety and reliability after use.
Recommended width:
1440mm±15mm、785mm±15mm;it can be slit into bobbins oraccording to customers’requirements.
Storage
The product should be sealed with moisture-proof paper and plastic film.The produt should be stored in dry,clean place 300mm above the ground.
| No. | Property | Unit | Requirements | |
| 1 | Base paper performance requirements | |||
| 1.1 | Thickness | mm | 0.13±0.01 | |
| 1.2 | Compactness | g/cm³ | 1.05~1.20 | |
| 1.3 | Ash content | % | ≤1.0 | |
| 1.4 | Conductivity of water extract | mS/m | ≤6.0 | |
| 1.5 | PH value of water extract | 一 | 6.0~9.0 | |
| 2 | Aluminum foil(copper foil)performance requirements | |||
| 2.1 | Thickness | mm | 0.018±0.001 | |
| 2.2 | Purity | % | 99 | |
| 3 | Aluminum foil(copper foi1)shielding insulating paper performance requirements | |||
| 3.1 | Thickness | mm | 0.15±0.02 | |
| 3.2 | Tensile strength MD | N/10mm | ≥160 | |
| 3.3 | Elongation at rupture MD | % | ≥2.0 | |
| 3.4 | Electrical strength | In air | kV/mm | ≥55.0 |
| In oil | ≥6.0 | |||
