Introducing our Diamond Dotted Transformer Insulation Paper, a marvel crafted from premium electrical insulating paper adorned with diamond-shaped epoxy resin on both sides. This exceptional product boasts outstanding dielectric properties coupled with remarkable mechanical strength post heat-solidification. Designed for endurance, it offers F Class heat resistance at a notable 155°C. The adhesive of the diamond dotted paper is engineered for re-curability, ensuring long-lasting performance and reliability.



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.