FLEX FOAM

SMARTFIL® FLEX FOAM is a flexible, expandable TPU 3D printing filament designed to produce lightweight, durable and highly elastic parts. Its key benefit is tunable expansion: the higher the printing temperature, the more the material expands, and by adjusting flow you can fine-tune final density and weight, achieving a foam-like structure that’s great for weight reduction and cushioning.

You can download the User Guide in the Downloads section of the product page.

The relationship between temperature and flow rate is essential:

1. Adjust the temperature. Use FLEX FOAM between 220–250°C, where the filament begins to expand.

2. Reduce the flow. As the material volume increases, you need to lower the flow to approximately 40–60% to compensate for the expansion.

3. Maintain dimensional stability. This combination of low flow + high temperature prevents over-extrusion and helps the part keep its dimensions, achieving lighter, more precise, and more consistent results.