Insulation Pressboard
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Insulation Pressboard Introduction
Insulation pressboard or electrical insulation board or laminated insulation board is a special insulation product based on pure cellulose taken from long-fibred coniferous wood. This is structured into a fibrous tissue without additional adhesive and then pressed. Due to its high chemical purity, the insulation pressboard is excellently suited as an insulation material in electric machines, capacitors, and oil-filled transformers. It is a widely used insulation paper.
Thickness: 0.8-30mm
size: 1000X2000mm 1000X1000mm
Color: Natural brown, red
Insulation class: A (105 ℃)
Insulation Pressboard Features
1. 100% sulfate pulp
2. High Flexible and Soft
3. Low shrinkage and compatibility
4. High purity and mechanical strength
5. Good compatibility with liquid dielectrics
6. Further processing is ensured since the pressboard can be punched, folded, cut, and formed without difficulty.
Insulation Pressboard Applications
To use as insulations material in Power and Distribution Transformers. It is also the base material for components like corrugated boards, cylinders, rings, and mouldable parts.
Electrical Insulation Board Specifications
Properties | Unit | Min/max or range | Index | |||
≤1.6mm | >1.6mm-3.0mm | >3.0mm-6.0mm | ||||
Thickness Deviation | % | Max | ±7.5 | ±5.0 | ||
Apparent density | g/cm3 | Range | 1.00-1.20 | 1.10-1.25 | 1.15-1.30 | |
Tensile Strength | MD | Mpa | Min | 100 | 105 | 110 |
CMD | 75 | 80 | 85 | |||
Shrinkage | MD | % | Max | 0.5 | ||
CMD | 0.7 | |||||
Thickness | 5.0 | |||||
Moisture content | % | Max | 6.0 | |||
Ash content | % | Max | 1.0 | |||
Electrical strength in oil | kV/mm | Min | 40 | 35 | 3.0 | |
Conductivity of Aqueous extract | mS/m | Max | 5.0 | 6.0 | 8.0 | |
Remark | in accordance with GB/T19264.3-2003/IEC60641-3-1.1992.B.3.1 | |||||
