Diamond dotted paper

 

Product information

It’s made of Kraft paper coated with heat curable epoxy resin . Diamond dotted paper used inoil-immersed transformers for the insulation between of coils. The color of resin is red or transparent.

The technical index as follows

 

Specified Properties Units Standard
 

 

Thickness Tolerance

inch 0.003 0.050 0.070 0.010 0.015 0.020
Mm 0.076 0.130 0.180 0.250 0.380 0.500
Thickness tolerance(base paper) % ±10
Width tolerance mm ± 5
Apparent Density g/mm^3 0.95 – 1.15
Tensile strength Min   Machine direction  

 

N/mm2

70 70 80 80 80 80
corss machine direction 35 35 35 35 35 35
Elongation MD  

 

%

2
CD 4
 

 

Dielectric breakdown (volts/layer, dry

 

 

volts

 

 

750

 

 

1100

 

 

1400

 

 

2100

 

 

2900

 

 

3100

 

No pollution oil of transformer

 

%

 

Non pollution

Moisture Content % 4.0-8.0,all thickness
PH water extract % 6.0-8.0, all thickness
Ash Content Max % 1% maximum
Bond Strength Min kPa 450
Coating thickness per side mm 0.006 to 0.012

Remarks :

Thickness: 0.08mm, 0.13mm, 0.18mm, 0.25mm, 0.38mm, 0.40mm and 0.50mm

Normal width: 960±5mm,      1300±5mm