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Diamond dotted paper(DDP) is made of insulating paper with diamond shape epoxy resin dotted on both sides. The epoxy used in DDP contains a kind of incubative hardener material. It is a dry and crisp material at normal temperature.This product has good dielectric properties and good mechanical properties after heat solidification. It is to be used in oil-immersed transformers for the insulation between coils and between layers of oil immerged power distribution transformers.
Width: 800mm, 960mm, 1000mm, 1050mm, 1200mm, 1300mmThickness:0.08mm, 0.13mm, 0.18mm, 0.25mm, 0.38mm, 0.50mm
Properties | Unit | Values | ||||||||
Thickness of base paper | mm | 0.08±0.005 | 0.13±0.007 | 0.18±0.01 | 0.20±0.01 | 0.25±0.01 | ||||
Density of base paper | g/cm³ | 0.85-1.10 | ||||||||
One side adhesive thickness | um | 10-15 | ||||||||
Moisture | % | 4.0-8.0 | ||||||||
Welding strength | Room temperature | kpa≥ | 650 | |||||||
100°C±2°C | 400 | |||||||||
Oil absorption | %≥ | 20 | ||||||||
For the pollution of transformer oil | Free from contamination(tan §‹0.001) | |||||||||
Tensile Strength | MD | N/10mm width≥ | 60 | 110 | 160 | 180 | 230 | |||
CMD | 30 | 50 | 70 | 80 | 100 | |||||
Tear Strength | MD | mN≥ | 450 | 900 | 1350 | 1500 | 2000 | |||
CMD | 500 | 1000 | 1500 | 1700 | 2300 | |||||
Breakdown Voltage | In air | Kv≥ | 8 0.88 | 1.37 | 2.00 | 3.10 | 2.25 | |||
In oil | 4.4 | 7.00 | 9.00 | 9.80 | 11.50 |
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