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Diamond Dotted Paper DDP

1. DDP is produced by insulating paper with diamond-sha … Continue reading Diamond Dotted Paper DDP


1. DDP is produced by insulating paper with diamond-shape epoxy resin dotted 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(below 35°C).
2. CharactersThis product has good dielectric properties and excellent mechanical properties after being heat-solidification.
3. ApplicationIt can be as interturn insulation material for coils of oil immersed transformer and interlayer insulation of distribution transformers.
4. SpecificationThickness: 0.08mm, 0.13mm, 0.18mm, 0.20mm, 0.25mm

Specified Properties Units Standard
Thickness Tolerance Mm 0.075, 0.08, 0.13, 0.18, 0.20,0.25, 0.30, 0.35
Density g/mm^3 0.95 – 1.15
Tensile strength Min N/mm^2 MD 70 – 90
CMD 40 – 50
Elongation Min % MD 2.0 – 3.0
CMD 7.0 – 9.0
Breakdown volume Min KV/mm In air  11-12
In oil  45-50
Oil Absorption Min % 8
Moisture Content % 4.0-8.0
Resin’s Content Min % 7 , 6 , 5 , 4 , 3.5
Ash Content Max % 1
Adhesion Strength Min kPa 450
Dp 1000

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