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
