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| High Density
Pre Compressed Board Balaji Board Grade 3.1 |
| Medium Density Pre Compressed Board Balaji Board Grade 2.5 |
| Insulating Press Paper
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| Insulating DDP Paper
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| Insulating Kraft Paper
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Contact Us: Balaji Cork & Rubber Inc. E- mail: info@balajicork.com, balajicork@yahoo.co.in |
BALAJICORK- Medium Density Pre Compressed Board (Balaji Board Grade 2.5)
TRANSFORMER INSULATING PRESSBOARD
BalajiBoards 2.5: Medium density Pre compressed Pressboard
General Classification
Balajiboard 2.5grade is made from 100 % high purity sulfate kraft wood pulp.
This board is pressed to medium density which makes it versatile, with excellent
insulation and mechanical strength and is used in all applications in oil cooled
distribution transformers.
Standard thickness of solid board
0.8, 1.0, 1.5, 2.0 & 3.0 mm
Thickness above 4.0 mm upto 5.0 mm are supplied on specific request
Standard Size of Solid Board (in mm)
Width |
Length |
1100 |
2200 |
2200 |
3300 |
2200 |
4400 |
Reference Grade & Standard |
BALAJI BOARD 2.5 |
Color |
Natural Light Brown |
Physical Properties |
|
Apparent Density, g/cc, range |
1.0 – 1.20 |
Moisture content, %, max |
8.0 |
Surface |
Wire marks |
Raw material |
Sulfate |
Shrinkage MD, %, max |
0.70 |
Shrinkage CD, %, max |
1. 0 |
Shrinkage PD, %, max |
5.0 |
Chemical Properties |
|
Conductivity of aqueous extract, mS/m, max |
8.0 |
pH of. Aqueous extract, range |
6.0 - 9.0 |
Oil absorption, %, min |
15.0 |
Ash content, %, max |
1.0 |
Mechanical Properties |
|
Tensile Strength, MD/CD (Mpa), min ≤1.50 mm |
80/55 |
> 1.5 ‐ 3.0 mm |
80/55 |
> 3.0 ‐ 6.0 mm |
80/50 |
Elongation, (%), min MD/CD |
6/8 |
Electric Strength Properties |
|
Electric Strength (kV/mm), min Air/Oil ≤1.50mm |
14/40 |
> 1.5 ‐ 3.0 mm |
13/30 |
> 3.0 ‐ 6.0 mm |
12/25 |
Copyright © Balaji Cork & Rubber Inc., All Rights Reserved. |