Electrical Grade Presspaper
High-purity cellulose presspaper for transformer winding and motor insulation systems
Overview
Multiply presspaper is manufactured from carefully selected high-purity cellulose fibres using multi-vat cylinder machines and subsequently calendered to achieve a smooth, uniform surface with consistent thickness.
The paper consists of homogeneous layers with excellent mechanical strength, dielectric performance, and ageing resistance. It is suitable for use as winding insulation in transformers and as inter-layer insulation in coils and motors.
Thermally upgraded variants are available for applications requiring improved thermal endurance beyond the standard Class A rating. Diamond-dotted epoxy resin coatings can be applied on one or both sides to provide inter-layer bonding in transformer windings, preventing layer movement under short-circuit forces.
Technical Specifications
| Specification | Value |
|---|---|
| Grades Available | KP 4.1, K2, Grade 4, Thermally Upgraded |
| Raw Material | High-purity cellulose fibres |
| Manufacturing Process | Multi-vat cylinder machine, calendered finish |
| Surface Finish | Smooth / plain or diamond-dotted epoxy coated |
| Resin Coating Options | Plain, Diamond-dotted epoxy (B-stage) – one or both sides |
| Thermal Class | Class A (105°C) / Thermally upgraded variants available |
| Oil Compatibility | Excellent (mineral transformer oil) |
Applications
- Transformer winding insulation
- Inter-layer insulation in coils
- Motor slot insulation
- Capacitor insulation
- High-voltage electrical insulation systems
Why Choose This Product
High electrical and mechanical strength
Excellent ageing resistance
Uniform thickness and consistent surface quality
Diamond-dotted variant prevents layer movement under fault conditions
Compatible with transformer oils and epoxy resin systems
Need Custom Specifications?
Our engineering team can customize this product to your exact requirements. Get in touch for a detailed quote.
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