3. Biopolymers that can meet the specifications for FDM-3D-printed materials

The considerations outlined in the previous paragraph regarding the main stages of the FA-DFF process allow us to summarize the key properties that must be given priority when identifying a candidate material for this process:

• the transition temperature from the solid to the molten state, corresponding to a melting point ( $T=T_{\mathrm{m}}$ ) and/or glass transition ( $T=T_{\mathrm{g}}$ ). The processing temperature must be higher than this transition temperature, but lower than...