Fibre-Reinforced Acrylic Sheets

BKF acrylic sheets & BKF CS acrylic sheets are made of specially produced acrylic resins and fibre composites. They are thermoplastically formable. Due to different reinforcing materials and their orientation, a wide range of different applications is offered.

BKF acrylic sheets are thermoplastical

Thermoplastical sheets have become indispensable for the daily work in orthopaedics. A specialty are the fibre-reinforced, thermoplastic BKF acrylic sheets in several hardness degrees and dimensions made by BEIL.

BKF Acrylic Sheets

Thermoplastic sheet material on acrylic resin basis with reinforcing inserts. Applications of the rigid and partially flexible qualities are supporting tongues in case of forefoot amputation, supporting fittings and smaller orthoses. The three-dimensional formable material has very good adhesive properties and can be laminated to other workpieces using acrylic resin.

BKF CS Acryl Sheets

BKF CS acrylic sheets are fabricated in a special process using specially produced acrylic resins and fibre composites. Different fibre types, types of weaves and the setting of the acrylic resin result in dynamic but also very rigid sheets. The material is suitable for light to rigid sole stiffeners, insole cores as well as for bands for side bars / bands orthoses.

Reinforcement Layers

The characteristic of each acrylic sheet is determined by the interaction of suitable acrylic resins and most diverse reinforcement materials. We use only high-quality glass and carbon fibres for our acrylic sheets.


Reinforcement layers made of glass are ideal for dynamic workpieces. Additionally, glass offers a good value for money.


Carbon fibres are lightweigth and have a very high strength.

Glass / Carbon Hybrid

The advantage of a glass sheet with carbon core is a high break strength with a good degree of dynamics. The sheet is only limited three-dimensionally formable. It is readily used for fabricating shoes and insoles.

Types of Weave

Possibility of different types of weave and their meaning

Knitted Fabric

Acrylic sheets with knitted fabric as reinforcement layer are perfectly suitable for a heavy three-dimensional thermoformability. The most common material to fabricate orthoses and footbeds with high cups is knitted glass fibre. Knitted carbon fibres have a high strength combined with low weight and thickness.

Twill Weave

Twill weave provides a high force absorption in longitudinal and transverse direction. Due to the arrangement of the single fibres of this type of weave, the acrylic sheets made of it are very thin and extremly stable. This sheet allows a good two-dimensional thermoformability. Twill is easily identified by its known pattern of diagonal lines.

Satin Weave

Like twill weave, satin weave is a very flat type of weave with a high force absorption. Due to the loose fabric, the sheet is limited three-dimensionally formable.

BKF acrylic sheets can be easily thermoformed

Cut / saw the required size from the acrylic sheet or use the pre-cutted soles for insole reinforcement and place it in the oven at 140 – 160 °C. Depending on thickness and version, the heating time varies from 5 to 15 minutes. Additional informationen is available in our Product Information. After heating, you can thermoform the sheet on your model to your needs using a vacuum forming device. When using thicker acrylic sheets, we recommend to cool down the workpiece in a water bath. Selective points can be thermoformed subsequently by heating with a heat gun.

1. model and sheet flat
2. model with thermoformed sheet, still on model
3. model with thermoformed sheet, stored next to it

Sheet Goods

BKF CS acrylic sheets are available in the dimension 120 x 50 cm. We can offer you cuttings in your required size. Please feel free to contact us.

Sole Stiffeners and Insoles

We can offer you wide range of BKF CS acrylic sheet types already in sole shape. You can choose between long-soled, short-soled and Rigidus form. Upon request, we preform the cuttings also as insole core or as insole with a light heel-to-toe drop.

Do you already know our insoles with fibre-reinforced core?

BEIL offers 3 versions of insoles. Next to the Comfort and Rigidus insole, we also have the spiral dynamic SpiroSenso insole in our portfolio. An easy and professional work result due to the enclosed pad, preformed insole core and high-quality padding material. Please ask for our insole flyer and do not hesitate to contact our service team for further questions.

We are happy to take some time for you

Our Technical Service will be pleased to answer your questions and offers you advice and support.
Please contact us any time at:

+49 5171 70990


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