Table III.
The Brittleness and Stiffness of the Prepared Hot-Melt Extruded Filaments Were Determined by a Three-Point Bend Test Where the Distance (mm) Until the Filament Broke and Breaking Stress (g/mm2) Was Recorded and Used as an Indicator if the Filament Would Be 3D Printable (Mean ± SD, n = 10)
| Formulation | Breaking distance (mm) | Breaking stress (g/mm2) | Printable |
|---|---|---|---|
| PLA | 3.69 ± 0.28 | 15,361.45 ± 2064.55 | Yes |
| 1 | 2.39 ± 0.43 | 5456.12 ± 769.68 | Yes |
| 2 | 1.93 ± 0.13 | 3125.75 ± 185.30 | Yes |
| 3 | 3.50 ± 1.09 | 5046.78 ± 1324.55 | Yes |
| 4 | 0.83 ± 0.05 | 3145.73 ± 265.98 | No |
| 5 | 2.80 ± 0.62 | 4982.93 ± 604.85 | Yes |
| 6 | 0.90 ± 0.19 | 1334.48 ± 67.08 | No |
| 7 | 2.70 ± 0.47 | 5119.04 ± 369.75 | No |
| 8 | 4.07 ± 0.94 | 4662.66 ± 625.93 | No* |
| 9 | 1.24 ± 0.13 | 4251.27 ± 929.07 | No |
| 10 | 2.59 ± 0.32 | 3255.59 ± 294.42 | Yes |
| 11 | 2.31 ± 0.31 | 4988.52 ± 142.70 | Yes |
| 12 | 1.78 ± 0.26 | 7637.32 ± 808.91 | Yes |
| 13 | 2.93 ± 0.28 | 6496.31 ± 443.79 | Yes |
*Day-to-day variability regarding printability, as the filament deformed during feeding, which occasionally failed the prints