DDP Diamond Dotted Insulation Paper
Description:
Diamond Dotted Insulation Paper (DDP) consists of electrical insulation paper (IEC 60641) coated on both sides with diamond-shape dotted epoxy resin in B-stage.
DDP Insulation Paper has high electrical and mechanical strength and shows good adhesive property. The epoxy resin can be cured at medium temperature, forming a stable insulation structure.
Application:
DDP Insulation Paper is mainly used as turn-to-turn and layer insulation in oil immersed power and distribution transformers.
Technical Data:
|
Item |
Properties |
Units |
LR-DDP90 Typical Values |
|
1 |
Backing Paper Thickness |
mm |
0.08 |
0.13 |
0.18 |
0.20 |
0.25 |
|
2 |
Thickness Tolerance |
mm |
±0.005 |
±0.007 |
±0.01 |
±0.01 |
±0.01 |
|
3 |
Coating Thickness per Side |
μm |
6~12 |
6~12 |
6~12 |
6~12 |
6~12 |
|
4 |
Tensile Strength |
MD |
N/10mm |
≥60 |
≥110 |
≥160 |
≥180 |
≥230 |
|
5 |
TD |
N/10mm |
≥30 |
≥50 |
≥70 |
≥80 |
≥100 |
|
6 |
Bond Strength at 25℃ |
KPa |
≥650 |
≥650 |
≥650 |
≥650 |
≥650 |
|
7 |
Moisture Content |
% |
4.0~8.0 |
4.0~8.0 |
4.0~8.0 |
4.0~8.0 |
4.0~8.0 |
|
8 |
Oil Absorption |
% |
≥20 |
≥20 |
≥20 |
≥20 |
≥20 |
|
9 |
Breakdown Voltage in Air |
KV |
≥0.88 |
≥1.37 |
≥2.00 |
≥2.10 |
≥2.25 |
|
10 |
Breakdown Voltage in Oil |
KV |
≥4.40 |
≥7.00 |
≥9.00 |
≥9.80 |
≥11.50 |
|
11 |
Curing Condition |
3h at 90℃±5℃, 6h at 125℃±5℃ |
Rolls: 3" paper or plastic core, max. width 1200mm; standard width 960mm, 1000mm.
Tapes: from 5mm width upwards
※ Special thickness or combinations can be supplied per customer’s request.
Shelf Life:
Minimum 6 months at 30°C; Minimum 12 months at 5°C
Note: The technical information, data, recommendations, and other statements provided are based on tests or research which we believe to be reliable, but such information shall in no event constitute a warranty of any kind by Liren. Before using this product, all purchasers should carefully evaluate its suitability for their intended applications.
