Electric Insulating Presspaper

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Product Details


This product has high chemical purity and high mechanical strength. After immersion, it has both mechanical and electrical properties.
Transformer presspaper is widely used in oil-immersed transformers and reactors, capacitors, switches, etc.

For many decades, presspaper has demonstrated its value as an insulation class A material. It is made of cellulose fibers and is obtained from a paper manufacturing process without the use of binders.

A proven surface insulation material, Presspahn is resistant to high voltage and a high capacity for impregnation with transformer oil (dielectric mix of oil-cellulose).

This press paper and pressboard is available in a variety of different thicknesses and formats, and can withstand high heat loads for short periods of time.

Presspahn is produced from 100% electrical grade kraft wood pulp and is a designed as a surface insulation material on cellulose for insulation class A.

It can be punched, folded, cut and, in some cases, shaped as well.

Depending on the type of cellulose, fibre conditioning and machinery settings, Hecheng supply a variety of presspaper and pressboard types with very specific characteristics.

Main propertiesDelivered as
  • Good impregnation properties

  • No melting point

  • Easy to shape

  • High dielectric values

  • machine presspaper, high-grade presspaper, and transformer presspaper

  • In rolls: thicknesses from 0.10 to 1.0 mm

  • In sheets: thicknesses from 0.70 to 4.0 mm