Description
Pressboard Insulation Material is made of 100% imported unbleached sulphate wood pulp. It is an indispensable dielectric material of the insulating structure of a transformer or other power transmission equipment.
Product Advantages
High-purity Raw Materials: Made from 100% high-quality kraft wood pulp, free of recycled impurities, ensuring dielectric strength and mechanical properties.
Higher electrical strength: Achieves ≥8kV/mm in transformer oil, reducing the risk of breakdown.
Excellent oil and heat resistance: Remains resistant to deformation and delamination even at 105°C oil temperature for long-term operation.
Tighter thickness tolerance: ±0.05mm, ensuring assembly accuracy.
Our Customization Services: Thickness range: 0.8mm – 50mm available.
Customizable sheet width: Up to 3000mm.
Further Processing: Cutting, punching, and bending can be performed according to drawings, saving customers' secondary processing costs.
| Product Name | Electrical Insulating Paper Board | Date of Producing | 2025.08 | ||
|---|---|---|---|---|---|
| Producing Item Code | IEC60641 - 3 - 1: 2008 | Quality Class | B.3.1B | Thickness | 2.0mm |
| Inspection Item | Unit | Standard Requirement | Test Value | Test Method | |
| Thickness Deviation | % | ±5.0 | 2.3 | ||
| Apparent Density | g/cm³ | 1.05 - 1.20 | 1.15 | ||
| Tensile strength - MD (Machine Direction) | N/mm² | ≥85 | 93.2 | ||
| Tensile strength - CMD (Cross Machine Direction) | N/mm² | ≥50 | 62.5 | ||
| Elongation - MD | % | ≥3.0 | 6.4 | ||
| Elongation - CMD | % | ≥4.0 | 7.45 | ||
| Shrinkage - MD | % | ≤0.7 | 0.53 | ||
| Shrinkage - CMD | % | ≤1.0 | 0.62 | ||
| Shrinkage - Thickness | % | ≤6.0 | 4.8 | ||
| Ash Content | % | ≤0.7 | 0.53 | ||
| Oil Absorption | % | ≥11.0 | 16.4 | ||
| PH of aqueous Extract | - | 6 - 9 | 7.52 | ||
| Conductivity of aqueous Extract | mS/m | ≤6.0 | 4.3 | ||
| Electrical strength in oil | kV/mm | ≥35 | 35.5 | ||
| Electrical strength in air | kV/mm | ≥12 | 12.5 | ||
| Moisture content | % | ≤6.0 | 5.7 | ||
| Inspection Conclusion: The test results meet the requirements of IEC60641 - 3 - 1:2008 for Class B.3.1B, and are qualified. Conclusion: The test results are passed according with the Standard of IEC60641 - 3 - 1:2008 B.3.1B |
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Display
Application
company advantage：
- We have vertical setup,so we can ensure price, quality and leadtime.
- We are manufacturing vendor and we invest 12% profit into R&D.
- We can make Time and Action Calendar 1 day after PO.
- We can give out CAP with 12 hours.
- We supply wide range of transformer components and insulation materials.
- We have a team with 20 years of experience to serve our customers.
FAQ
Q：Can you make our design for the package?
A：Yes, please send us the design you need ,we will value the price and make the exact same package basing on your design.
Q：What's the universal lead-time for order delivery?
A：20-30days or basing on your qty.
Q：What can you get from us?
A：Excellent products (unique design, advance printing machine,strict quality control ) Factory direct sale (favorable and competitive price) Great service(OEM,ODM, after-sales services, fast delivery) Professional business consultation.
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