Diamond dotted paper is made of insulation paper coated by modified epoxy resin in the shape of rhombus.
In the process of coil drying, the agglutinating and solidifying of DDP can bond the coil into a fixed unit.The bonding strength of epoxy resin is sufficient to prevent the displacement of the various layers of the winding in short circuit condition and further ensure the long-term mechanical and electrical properties of insulation structure.
Insulation Paper
0.08mm 0.13mm 0.18mm 0.2mm 0.25mm 0.3mm
625mm 980mm (Ribbon is available.)
250~300mm
45~60Kg
Insulation class A according to IEC 641
Kraft paper, 100% sulphate pulp
High purity and mechnical strength
Baked enamel coating: epoxy resin, rhombic, one or both sides
Good compatibility with liquid dielectic after the baked enamel coating has hardened
Take care of the layers
● Interlayer insulation in oil-immersed power transformers
● Interturn insulation in transformer windings
● Adhesive bonding during coil drying process
● Preventing displacement of windings during short circuits
● Ensuring long-term electrical and mechanical performance
● Facilitating oil impregnation and gas release
● Avoiding corona discharge and partial discharge
● Cable shielding isolation layer
● Anti-corona material for high-voltage motors and electrical equipment
| DDP - Diamond Dotted Paper | |||||||
|---|---|---|---|---|---|---|---|
| Properties | Units | Values | |||||
| Thickness | mm | 0.08 | 0.13 | 0.18 | 0.2 | 0.3 | |
| Thickness Tolerance | % | 6.5 | |||||
| Density | g/cm³ | >0.9 | |||||
| Tensile Strength | MD | Mpa | >75 | ||||
| TD | >37 | ||||||
| Tear-resistance | mN | >500 | >1000 | >1500 | >2000 | >2000 | |
| Breakdown voltage | V | >800 | >1100 | >1400 | >2200 | >3000 | |
| Moisture content | % | 8.0 ±1.0 | |||||
| Ash content | % | 1 | |||||
| Bonding strength | Kpa | >350 | |||||
| Cure Temp | ℃ | 120±5 | |||||
| Storage Condition | ℃ | Under 35 | |||||
The above values are for reference only and are taken from the average test results, do not represent complete consistency with the actual performance of the material.
Yes, based on drawings or samples.
UL, RoHS, REACH, CE, ISO, etc.
Usually 100 kg or 100 sheets, negotiable.
Yes, common samples free, buyer pays freight.
2-4 weeks after payment.
Yes, including labeling and packaging.
Yes, over 20 years.
T/T 30% deposit, 70% before shipment. Negotiable if supports needed.
Yes, we offer CNC machining.
Manufacturer and Exporter
No.3, Mianzhi Street, Zhucheng, Shandong, China
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