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BALAJICORK- Diamond dotted Insulating Paper (DDP)
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Product Name：Diamond Dotted Insulation Paper------ DDP
Product Model：DDP
Diamond dotted insulation paper is made of electrical insulating paper with diamond-shape epoxy resindotted in both sides.The epoxy resin used in D.D.P. contains a kind of incubative hardener material, it is a dry and crisp material at normal temperature (below35℃).
This product has good dielectric properties and good mechanical properties after being heat-solidfication. It can be used as insulation material for coils and between layers of oil immerged power and distributiontransformeers.
| Item |
Index. |
Unit |
Value |
1 |
Thickness and tolerance |
mm |
0.08±0.005
0.13±0.007
0.18±0.010
0.20±0.010
0.25±0.010 |
2 |
Density |
g/cm3 |
0.85～1.10 |
3 |
Single thickness |
μm |
10～15 |
4 |
Moisture content |
% |
4.0～8.0 |
5 |
Oil-absorption |
% |
≥20 |
6 |
Bond strength |
at room temp. |
kPa |
≥650 |
100℃±2℃ |
≥400 |
7 |
Pollution for transformer oil |
- |
no pollution(△tan∮＜0.001) |
8 |
Tensile Strength |
lengthwise |
N/10mm |
≥60 |
≥110 |
≥160 |
≥180 |
≥230 |
crosswise |
≥30 |
≥50 |
≥70 |
≥80 |
≥100 |
9 |
Tearing Strength |
lengthwise |
Mn |
≥450 |
≥900 |
≥1350 |
≥1500 |
≥2000 |
crosswise |
≥500 |
≥1000 |
≥1500 |
≥1700 |
≥2300 |
10 |
Breakdown voltage |
in air |
KV |
≥0.88 |
≥1.37 |
≥2.00 |
≥2.10 |
≥2.25 |
in oil |
≥4.40 |
≥7.00 |
≥9.00 |
≥9.80 |
≥11.50 |
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