Diamond pattern paper made of Kraft paper coated with heat curable epoxy resin.The epoxy adhesive is applied to both sides of the paper in a diamond pattern consisting of 9.5mm x9.5mm diamonds with 15.9mm center spacing.
Hecheng DDP can also be supplied in the "thermally upgraded" version, which is called TU DDP. It is achieved by adding a small quantity of nitrogrnous additive.
Width: DDP strip minimum 4mm to master roll 1900mm
Thickness:0.08mm, 0.13mm, 0.15mm, 0.18mm, 0.25mm, 0.30mm, 0.35mm, 0.38mm, 0.45mm, 0.50mm
good dielectric properties and good mechanical properties after heat solidification
Curing condition for Hecheng DDP: cured for 90℃±5℃ by 3 hours first, then for 125℃±5℃ by 6 hours.
Storage and shelf life: Minimum 12 months, to be stored in dry, clean warehouse, avoid direct sunlight and heat.
Q: Can you provide OEM service according to customer's requirement?
A: Hecheng owns superior processing/testing equipment and specialized laboratories, thus products improvements or OEM are easily made according to every customer's unique needs.
Q: What is your terms of packing?
A: Generally, we pack our goods in neutral brown cartons and put on pallet, protected with film polyester wrapping.
Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance. And a detailed packing list file will be offered.
Q: What are your main products?
A: For oil immersed transformers, like diamond dotted paper/DDP/DPP, Crepe paper, crepe paper tube, kraft paper, pressboard and so on.
For dry type transformers, like class F DMD, Prepreg DMD, NMN, AMA, NHN, AHA, and so on.
For electrical motors, like polyester film, DMD, NMN, NHN, fish paper with polyester film, PMP and so on.
Q: Are you manufacturer or trading company?
A: Hechin is manufacturer.
Transformer's performance depends heavily on its insulation system, therefore the insulation is perhaps the most critical transformer part. The internal insulation system of oil-filled transformer is based on pure mineral oil, and cellulose in the form of paper, pressboard, and sometimes selected natural wood.