Diamond Dotted Insulation Paper Kraft Resii

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Product Details

This is product id manufactured from insulation press paper and partially coated with epoxy resin on one or both side. The dots are arranged to have diamond pattern consisting of 9.5mm*9.5mm diamonds with 15.9 center spacing. 

diamond dotted paper DDP DDP for oil transformer insulation

This design improves the mechanical strength of oil-immersed transformer winding without reducing partial discharge levels. 

It is suitable for turn-to -turn insulation of coil wires on oil-immersed power transformers and suitable for layer insulation of coils on distribution transformers.


One side coatingum6~12
Moisture content%4.0~8.0
Ash content%≤1.0
Water extraction of Electrical conductitymS/m≤10
PH Water extract
Oil absorption%≥20
Bond strengthKpa≥650
Tensile strength N/10mmTD60100110130160200≥250


Forms of supply

1) Avaliable width: DDP strip minimum 4mm to master roll 1900mm.

2) Curing condition for Hecheng DDP:  cured for 90℃ ± 5℃ by 3 hours first, then for 125℃ ± 5℃ by 6 hours.

3) Storage and Shelf life: Minimum 12 mouths, to be stored in dry, clean warehouse, avoid direct sunlight and heat.


electrical insulation manufacturer

Our Service

a.1 year warranty
b.OEM & ODM are welcome
c.Trial orders are available
d.Sample can be supplied in 7days.
e.Technical supports.
f.Shipping and express will be tracked and reported at any time after sending.

factory of electrical paper hecheng

Packing & Delivery

DDP insulation craft paper

Size1.1M (L) * 1.1M (W) 
Weight2.2 KG
Packaging Details1.sealed packing with cardboard protection in roll, sea worthy plywood pallet shipping; 
2.800kg-1000kg per pallet .
3.pallet size 1100x1100x1250mm (for width 1000mm coil) 
4.Conveyance: 10 tons/20ft, 20tons/40HQ(no more than 27tons)

Welcome to contact Haotai, which is one of best diamond dotted insulation paper kraft resii manufacturers and suppliers in China, you can also get diamond dotted insulation paper kraft resii free sample from our factory.