Flexible lightweight TPU with customizable density and strength. This innovative TPU filament from eSun is specifically designed to foam during printing. The density and strength can be individually adjusted through print temperature and extrusion factor. With a maximum foaming ratio of 200%, the weight can be significantly reduced without sacrificing stability. The material features a fine matte texture that minimizes visible layer lines and provides a pleasant feel. Despite its high flexibility, TPU-LW remains tear-resistant and elastic, allowing printed objects to return to their original shape after deformation. Thanks to its good adhesion and ease of painting, it is ideal for model building, cosplay, flexible wearables, and sports equipment, whether for lightweight airplane models or flexible protective components.

Quick guide for printing with TPU-LW:
Disable retraction: Turn off retraction movements in the slicer, as the TPU continues to foam in the hotend. Stringing is normal – vase mode can help.
Adjust first layer: Set speed to 100% and disable slowdown for small areas. Adjust extrusion rate (e.g., 58% at 260°C).
Optimize adhesion: If the part sticks too strongly to the print bed, reduce the bottom layer extrusion value.
Observe maximum print temperature: Do not operate PTFE tubes above 250°C – use a metal hotend for higher temperatures.
Avoid discoloration: Excessive temperatures can cause yellowing or nozzle clogs – reduce temperature if necessary.
Ensure constant temperature: Perform PID tuning and disable speed reductions to ensure stable foaming.
Fine-tune extrusion: Higher temperature → stronger foaming → less extrusion required. Higher print speed → less foaming → more extrusion required.