1. DESCRIPTION
The paper is made from 100% high purity sulfate insulating wood pulp, unbleached, uncoated and no any adhesive or filling material. The thickness and texture are uniform. Pinhole, undispersed fiber agglomerates and local defects are allowed by security requirements of inductor manufacture.
2. FEATURES
Excellent electrical insulating performance
Good chemical and physical properties
3. APPLICATIONS
Used for manufacturing of 500kV inductor
4. TECHNICAL PARAMETER
|
ITEM |
UNIT |
STANDARD VALUE |
|||
|
Thickness |
μm |
125±8.0 |
200±12.0 |
||
|
Apparent density |
g/cm3 |
0.75±0.05 |
|||
|
Tensile index |
MD |
N·m/g |
≥88 |
||
|
TD |
≥38 |
||||
|
Elongation |
MD |
% |
≥2.0 |
≥2.0 |
|
|
TD |
≥5.0 |
≥5.0 |
|||
|
Conductivity of water extract |
mS/m |
≦2.5 |
|||
|
Dielectric strength |
kV/mm |
≥6.5 |
|||
|
Tear strength (TD) |
mN |
≥981 |
≥1177 |
||
|
Air permeability |
μm/(Pa.s) |
≦0.68 |
|||
|
Ash content |
% |
≦0.3 |
|||
|
PH of water extract |
6.5～7.2 |
||||
|
factor( tan δ) 100 ℃ |
% |
≦0.23 |
|||
|
Water content |
% |
5.0～8.0 |
|||
