Electrical kraft paper is a high-purity cellulose-based insulation material widely used in oil-filled power and distribution transformers, capacitors, motors, and switchgear. Manufactured from unbleached, long-fiber wood pulp, this paper offers excellent mechanical strength, high dielectric properties, and thermal endurance, making it ideal for demanding electrical applications.

This paper is specifically engineered for electrical insulation, conforming to industry standards for oil compatibility, electrical stress resistance, and dimensional stability under thermal aging. Electrical kraft paper is often used as interlayer insulation, conductor wrapping, and core insulation in transformer windings and other high-voltage assemblies.

features:

• Excellent dielectric strength and electrical insulation performance

• High mechanical durability for long-term structural reliability

• Compatible with mineral transformer oil and ester fluids

• Resistant to thermal aging and moisture absorption

• Available in rolls, sheets, or custom die-cut formats

• Manufactured from high-grade, unbleached kraft pulp

Technical specifications:

• Material: 100% cellulose, unbleached kraft pulp

• Thickness range: 0.05 mm to 0.50 mm

• Dielectric strength: ≥ 6 kV/mm

• Density: 0.80 to 1.20 g/cm³ (depending on grade)

• Thermal class: Class A (105°C)

• Moisture content: ≤ 8%

• Standards: IEC 60554, ASTM D202

Applications:

• Power and distribution transformers

• Oil-immersed electrical equipment

• High-voltage bushings and tap changers

• Motor and generator coil insulation

• Capacitor and cable insulation

Our electrical kraft paper is manufactured using advanced pulping and refining techniques to ensure consistent quality, electrical reliability, and compatibility with insulating oils. It is trusted by transformer manufacturers, electrical OEMs, and maintenance professionals worldwide for its superior performance in insulation-critical environments.