Transformerboard: Rigid insulation solutions for transformers

Transformerboard, also known as pressboard, is a rigid insulating material designed for demanding electrical applications, particularly in transformers and power distribution equipment. It provides reliable electrical insulation, high mechanical strength and long-term stability in critical environments.

Used in the energy, rail and industrial sectors, the transformerboard is essential for ensuring the safety, performance and longevity of high-voltage electrical systems.

At ADDEV Materials, we support manufacturers in selecting and custom-processing Transformerboard to optimise its performance and integration into applications.

Discuss your transformer board needs with an expert
Receive a technical recommendation

Transformer board

Transformer board for electrical insulation

The transformerboard is used for:

  • Isolate the high-voltage components
  • to structure electrical systems
  • maintain isolation distances

It is essential in electrical transformers.

The transformer board is distinguished by its rigidity:

  • transformerboard
  • cellulose → flexible
  • aramide → high thermal performance
  • kraft → simple solution

The choice depends on the mechanical and electrical constraints.

What is a transformer board (pressboard)?

Transformerboard is a rigid insulating material made from compressed cellulose fibres, designed to provide high-performance electrical insulation and high mechanical strength.

Its main features:

  • excellent dielectric properties
  • high structural rigidity
  • dimensional stability
  • High-voltage environment compatibility

This is an ideal solution for structural components in electrical systems.

Transformerboard versus other materials: What's the difference?

Le transformerboard is a structural solution for electrical insulation.

Transformerboard versus cellulose

  • hardboard
  • cellulose → flexible

Transformer board vs aramide

  • transformerboard → structure
  • thermal performance

Transformerboard vs. Kraft

  • Transformer Board High Mechanical Performance
  • kraft → simple solution

In a nutshell

  • Choose a transformer board for rigid, structural and high-voltage insulation
  • prioritise other materials for more flexible needs
Pressboard

Industrial applications of transformerboard

Electrical transformers

  • Insulation of windings
  • component separation
  • maintaining isolation distances

Energy

  • High-voltage equipment
  • distribution systems

Electrical equipment

  • Structural Insulated Components
  • mechanical supports

Rail

  • On-board electrical systems
  • sustainability

General industry

  • applications requiring rigidity and insulation

Transformer board is a key material for high-voltage applications.

Which industrial markets use this product?

How to choose the right transformer board

Required stiffness level

The choice depends on :

  • mechanical constraints
  • of the system structure

Critique des transformateurs.

Electrical performance

The material must:

  • ensure reliable insulation
  • to withstand electrical stresses

Essential for safety.

Operating environment

To be assessed according to:

  • temperature
  • humidity
  • Mechanical stress

Ensures durability.

Industrial process compatibility

It's important to think ahead:

  • cutting
  • Cheese
  • integration

A tailored solution optimises production.

Our transformation capabilities dedicated to transformer boards

ADDEV Materials offers processing capabilities tailored to transformerboards:

Why choose ADDEV Materials for your transformerboard?

ADDEV Materials supports you with complete technical expertise:

Multi-material expertise

Technical support

International industrial presence

Advanced converting capabilities

Cost / performance optimisation

We help you improve the reliability and safety of your electrical systems.

Need transformer boards for your application?

Every application requires a tailored solution.

Our experts can help you with :

  • identify the right material
  • optimise your design
  • secure your performance

Talk to a materials expert
Get a personalised quote

FAQ – transformerboard (pressboard)

It is a rigid insulating material used in electrical transformers.

It is used to isolate and structure electrical systems.

The transformer board is rigid, unlike flexible papers.

Yes, it is designed for high-voltage applications.

Yes, it can be cut and machined as required.

It offers rigidity, insulation and durability.

Yes, that is its main application.

The electrical and mechanical constraints must be analysed.