Transformerboard (pressboard) fibers

Transformerboard is a cardboard made from several layers (or plies) of cellulose-based paper which is pressed using a combination of heat and pressure to form a dense and rigid board.


Tansformerboard is used as an electrical insulation material for high voltage transformers, windings, etc.


To meet the widest range of customer requirements, we can treat Transformerboard (by applying coatings), cut it to the required shape and provide various densities and thicknesses.


For example: Transformerboard coated with a thermosetting phenolic epoxy coating applied in a diamond pattern (to one or both sides) which offers very high purity and good mechanical strength, providing good compatibility with transformer oils.

Electrical insulation
High mechanical strength

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Typical applications

  • Electrical insulation (transformer, transformer components, etc.)
Some of our references


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We are commited to deliver converted or cut materials in their most finished possible form

ADDEV Materials examines customers’ requirements to provide fully adapted custom design to implementation solutions for parts cut to the required shape.


ADDEV Materials uses various processes to cut all soft, flexible products into specified formats such as A4, A3 or any other dimensions.

The purpose of laminating is to combine materials to enhance the properties of a single film.

Lamination is a process whereby an adhesive layer is applied to a material.