Diamond Dotted transformer Insulation Paper is made of electrical insulating paper with diamond-shape epoxy resin dotted in both sides. It has good dielectric properties and good mechanical properties after being heat-solidification.The heat resistance is F Class(155°C).The glue of the diamond dotted paper can be re-cured.



STANDARD:JB/T1004.3-2004 | insulation between coils ddp diamond laminated kraft paper | ||||||
Project | Unit | 0.08 | 0.13 | 0.18 | 0.2 | 0.25 | |
Thickness&Tolerance | mm | ±0.005 | ±0.007 | ±0.01 | ±0.01 | ±0.01 | |
Density | g/m2 | 0.85-1.1 | |||||
Moisture Content | % | 4.0-8.0 | |||||
Water Extraction PH | ---- | 6.5-8.5 | |||||
Ash Content | % | ≤1.0 | |||||
Adhesive Thickness | μm | ≤1.06-12 | |||||
Oil Absorbency | % | ≥20 | |||||
Contamination to Transformer Oil | ---- | No Contamination | |||||
Bond Strength | Normal | Kpa | ≥650 | ||||
100ºC±2ºC | ≥400 | ||||||
Tensile Strength | MD | N/10mm | ≥60 | ≥110 | ≥160 | ≥180 | ≥230 |
CD | ≥30 | ≥50 | ≥70 | ≥80 | ≥100 | ||
Elongation | Normal | % | ≥2.0 | ||||
100ºC±2ºC | ≥4.0 | ||||||
Tear Strength | MD | MN | ≥450 | ≥900 | ≥1350 | ≥1500 | ≥2000 |
CD | ≥500 | ≥1000 | ≥1500 | ≥1700 | ≥2300 | ||
Breakdown Voltage | in the air | KV | ≥0.8 | ≥1.37 | ≥2.00 | ≥2.10 | ≥2.25 |
In the oil | ≥4.0 | ≥7.00 | ≥9.00 | ≥9.80 | ≥11.50 |
Yantai Libo International Trade Co.,Ltd.







Yes, we have been offering OEM service for 10 years.
Yes, you are always welcome to visit our factory.
Yes, we can provide sample for free but the freight and other charges is payed by the customers.
Yes, we can. We can help you find a professional custom clearance company to do it.
Yes, we can. We are allowed to use your designated agent's name if you have one..
We kept another same sample and marked on company when we sent to customer. So our production will be based on.