Researchers at the Fraunhofer Institute for Wood Research (WKI) in collaboration with Studio Jonathan Radetz have developed a new seating system that combines biobased flax fibre textiles with steel structures. The project, called Linum Tube, responds to the growing demand for sustainable furniture.

The design follows circular economy principles. Each piece uses only two main materials: a flax fibre textile and a steel frame. Designers can easily separate these parts without damage. This allows reuse, repair, or recycling through existing material streams.

Unlike conventional furniture, the system supports long-term use. It avoids glue, screws, and permanent connections. As a result, users can take it apart quickly and reassemble it when needed.

Flexible Design For Adaptable Interiors

The key innovation is the multi-layer flax fibre fabric. Researchers produce it using advanced weaving technology. The fabric comes off the loom as a single piece, ready for use. It does not require cutting or sewing.

The textile includes built-in channels. These allow designers to slide the fabric directly over the steel tubes. This simplifies both production and assembly.

The system also supports flexible interior layouts. Designers can combine different frames and textiles to create benches, chairs, or stools. They can also adjust sizes and configurations. This makes the furniture suitable for changing spaces, such as offices or public interiors.

Material Innovation Enhances Comfort And Functionality

The flax textile does more than provide structure. It also improves comfort and appearance. Different weave patterns create natural cushioning effects. Designers can choose from various colours, textures, and finishes.

The fabric can also integrate lighting. Built-in channels allow users to add removable LED strips. This creates soft, indirect lighting within the furniture itself. These features show how materials can combine structure, comfort, and function in one system.

A Scalable Concept For Sustainable Furniture Design

The Linum Tube project shows the potential of biobased materials such as flax fibres in furniture design. By combining them with steel, the system balances sustainability and durability.

The concept also highlights the value of reversible design and material simplicity. Designers can mix and match components to create different products. At the same time, they keep the system easy to disassemble.

Early prototypes have already appeared at international furniture fairs. The project offers a clear example of how circular design can work in practice.

Source: Fraunhofer WKI
Photos: Fraunhofer WKI / Manuela Lingnau / Eda Temucin