Dry Type Transformer Insulation Film DDM

Chat Now
Product Details


It is also known as DPF. The use of this B-stage resin coated film increases the mechanical strength of transformer coils. it is produced by coating modified epoxy resin in diamond dot patterns on electrical insulating film. the size of the dots are carefully designed and arranged to cover only 36% of the surface, remaining 64% free for optimum SF6 gas distribution.

 DDM wire winding insulation film for transformer


1) Dry-type transformer layer insulation

2) Oil filled transformer layer insulation

3)SF6 high current voltage transformer wire winding insulation or layerinsulation film

4)Motor slot insulation, ot phase insulation film

5)Suitable for Automobile, Electronic application



Nominal thicknessmm0.050.750.10
Thickness tolerancemm±0.005±0.01±0.01
Standard widthmm1000mm

Tensile StrengthN/10mmLengthwise≥100≥110≥150
Breakdown voltageKV≥6≥8≥9
Bond strengthKpa≥350

Curing temperature and time
90℃ ±5℃/16h or 130℃ ±5℃/6h

Storage life 
6 months, room temperature, dry and well-ventilated enviroment


• Thermal class:  B(130℃) & H(180℃)

• Thickness:  0.02-0.10mm

• Standard width: 1000mm (or according to customers’ requirements)

• Color: red

• Form: roll, sheet, and strip

• Superiority: Reasonable price, high quality, prompts delivery, and excellent service.

• Product curing conditions: 90℃±5℃/16 hours; or 110℃±5℃/6hours



Should be stored in a temperature of not higher than 25℃, dry, ventilated and clean environment, and should avoid high temperatures and sunlight. The storage period is six month; over the storage period of the examination, successful applicants an still be used.

DDM application oil transformer layer

Certificationstransformer insulation paper manufacturer

Detailed ImagesDDM for SF6 transformer hechinmotor slot film with resin

Main Features

Name: Diamond dotted polyester film(DDM)
Original: China
Usage:Motor slot insulation, ot phase insulation film

Suitable for Automobile, Electronic application

SF6 high current voltage transformer wire winding insulation or layerinsulation film

Machine Parts

Name: Diamond dotted polyester film(PDF)
Brand: Natural 
Original: China

manufacturer of insulation materials

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.

Packing & Deliverymanufacturer of insulation materials in china

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)