Applied Polymer Innovations Emmen (API Institute) has developed monofilament materials based on the thermoplastic co-polyester (TPC) from DSM Engineering Plastics. Fused deposition modelling (FDM) is a new additive manufacturing technology commonly used for modelling, rapid prototyping, and production applications. The Arnitel Eco monofilament is melted and deposited by an extrusion head of the 3D printer, which follows a tool-path defined by the CAD file. The materials are deposited in layers as fine as 0.15 mm.Almteq aims to use only bio-based materials for its printers and was looking for a flexible material to add to its portfolio. The company found a suitable material with Arnitel Eco. The TPC has a 20?-?50 % content derived from renewable resources. It was introduced at K 2010.