13 September 2021
Author: Nikoleta Sidiropoulou

Twine is a series of 3D printed modular seating elements made entirely of r-PETG recycled from medical tray
waste, encouraging dynamic interaction through combining individual segments into a streamlined flow.

Designed for the third edition of Rossana Orlandi Guiltless Plastic campaign, TWINE is an urban public furniture piece pushing the boundaries of additive manufacturing with conformal 3D printing and bespoke design. A collaboration between designers HagenHinderdael, outstanding sustainable material supplier Reflow, and award-winning Artificial Intelligence and robotic 3D print developers Aibuild, TWINE takes waste from medicinal settings and transforms it into functional and playful modular furniture elements.

The material itself has been extruded by Reflow, a sustainable material development team who work in collaboration with leading recyclers in the EU to extensively test and match discarded material streams to specific design applications from prototyping to architecture, automotive or product design. In the process, Reflow melts and pulls shredded rPETG plastic granulates through a number of specific heating zones until the medical tray waste can be winded into filament for high performance, large-format 3D printing. The filament is heat resistant, weatherproof, and durable for the usage of indoor and outdoor furniture.

Working with technology pioneers Aibuild, this filament is then transformed by the Aibuild robotic systems using Aibuild software to create conformal toolpaths to print atop a bespoke mould. As the filament feeds through the robotic system, TWINE is created. The system itself can carry up to four varying filament streams, enabling a gradient of transparencies within the elements and unlocking a rich spectrum of colour from the recycled material.

In its design, the sculptural form of Twine has been developed to encourage play. Available as a seat or elongated bench, its edge has been designed to allow endless combinations with an overall wave-like form that creates varying ways to sit amongst or within the piece. This playful interaction is further enhanced by the natural transparency within the materiality itself, allowing light to protrude in dynamic ways. We invite users to assemble the elements as individual components or flip and combine them into longer configurations providing new discoveries at every turn.

Driven by the concept of merging sustainable technologies with play and interaction, TWINE is the result of a cognitive and extensive partnership where we seek new sources of postconsumer or post-industrial material types discarded by other industries which can fulfil meaningful long lasting or closed loop applications.


• Twine is designed by London-based studio HagenHinderdael in partnership with Reflow and Aibuild

• Twine is a selected finalist of RO Plastic Prize 2021, Urban Public Furniture Design

• Twine is fully sustainable, consisting entirely of 3D printed r-PETG from medical tray waste

• Twine is available in several colours including : Arctic breeze, Seafoam Green, and Nautical Blue

• Twine comes as a seat measuring 1050mm (l) x 750mm (w) x 505mm (h) with bespoke sizes available upon request

• Photographer: Anders Gramer
• Social tags: #Twine #hagenhinderdael #reflowfilament #aibuild

About HagenHinderdael

Pairing product design with art, HagenHinderdael pursue a design approach that explores the relationship of lighting and large scale installations in immersive environments. Merging their abilities as designers with the material knowledge and craftsmanship of local artisans and cutting-edge technology, the designers produce elements and installations that push the boundaries of engineering whilst bearing the incentive of a continuous afterlife. Their ethos is to celebrate long-established craftsmanship and always think about the lifecycle of their installations. In temporary installations, wherever possible, a product is developed as the singular unit of the composition – creating a unique way for the pieces to be re-used and distributed after installation.The founders Sofia Hagen and Lisa Hinderdael established HagenHinderdael following their backgrounds in architecture and interiors. They previously exhibited at Somerset House, the Design Museum London, the Venice Biennale, the Salone del Mobile in Milan, The Museum of Applied Arts Vienna, the Biennale Rotterdam and the Arch Moscow.

About Reflow

Reflow is an award winning social enterprise, dedicated to tackling plastic pollution while creating innovative, scalable, manufacturing solutions. We transform source traceable waste streams into high-performance, sustainable 3D printing filament and develop new biodegradable and composite materials to match specific design applications. Over the past 6 years, we’ve assembled a world class team of engineers, entrepreneurs, and material scientists to build a truly collaborative 3D printing design ecosystem that includes leading global recyclers and iconic sustainably minded organizations. We’re all united by the same great idea, turning the plastic problem into a creative opportunity and
viable social enterprise.