Company Details

The Röchling Group has been shaping the industry. Worldwide. For nearly 200 years. We transform the lives of people every day with our customized plastics by improving industrial applications. Our workforce of around 11,100 people is where our customers are – in 90 locations, in 25 countries. The Group’s three divisions generated joint annual sales of 2.039 billion euros in 2020.

The Industrial division is the expert for optimal materials for every use. We develop and supply individual products made of plastic for all industrial areas. This is why we have the broadest product range of thermoplastics and composite materials. We supply our customers with semi-finished products or machined components.

Composite materials for the Electrical Industry

For more than 60 years, our materials have been used in the global electrical industry as insulation and construction materials. Renowned manufacturers use our plastics in the development of high-voltage transformers, efficient generators & motors, reliable high-voltage direct current converter stations, and switchgear. We know: The materials used must be as individual as the applications are different. We will gladly advise you in selecting the right materials for your application.

Insulating Material for Transformers

Transformers have to be operationally safe and reliable even at high operating temperatures and high electrical stress. Our premium insulating materials are specifically developed for these requirements. They meet the highest dielectric and thermal requirements and have been used within transformers for more than 60 years. They will help you in the development of high-performance and safe transformers. As a member of the TRANSFORM partner network of European premium suppliers for the transformer industry, we help you to design the standards of tomorrow's transformers.

Products & Services

Durostone® (GFRP) 

As a glass fiber-reinforced plastic, Durostone® offers extremely high resilience and the best electrical, thermal, and chemical properties. It is thus particularly suitable for the demanding usage conditions in transformers. Typical parts are shield rings, shield end rings, pressure rings, and connection elements.

Lignostone® Transformerwood®

Under the brand name Lignostone® Transformerwood® we offer you a laminated densified wood according to IEC 61061 for the construction of transformers that consists of beech veneers (Fagus sylvatica), which are joined together with thermosetting synthetic resins under pressure and heat. Lignostone® Transformerwood® has the following properties:

• good electrical insulation
• very good oil absorption
• low specific weight
• withstands high mechanical loading
• low- and high-temperature resistance
• resistance to abrasion and wear

Trafoboard® HD-PH - Laminated pressboard

High-performance insulation products for oil-filled power transformers 

The experience of one century

For almost one century Röchling has been manufacturing the insulation material Lignostone® Transformerwood® for use in high-voltage transformers. This outstanding material enjoys an excellent reputation within the international transformer industry.

With Trafoboard® HD-PH Röchling now completes their range of insulation materials to a high-quality laminated pressboard for insulation components in oil-filled high-voltage transformers.

Trafoboard® HD-PH represents a high level of quality, excellent electrical and mechanical properties, high chemical purity, and close tolerances.