Table 1.
Grammage, thickness, mechanical and optical properties of bilayer films.
| Properties | Bilayer Control Films | Bilayer Films (with Licorice Essential Oil) |
p-Value | |
|---|---|---|---|---|
| Grammage (g/m2) | 134.38 ± 2.13 | 149.16 ± 1.74 | 0.001 * | |
| Thickness (µm) | 154.16 ± 6.63 | 168.37 ± 5.42 | 0.047 * | |
| Mechanical properties | Elongation at break (%) | 3.00 ± 0.01 | 2.39 ± 0.36 | 0.099 |
| Tensile index (N·m/g) | 25.33 ± 0.93 | 20.33 ± 1.67 | 0.018 * | |
| Elastic modulus (MPa) | 1196.92 ± 149.41 | 1119.66 ± 62.99 | 0.476 | |
| Optical properties | L* (lightness) | 31.87 ± 0.37 | 38.45 ± 0.44 | <0.001 * |
| a* (redness) | −0.61 ± 0.03 | −0.17 ± 0.03 | <0.001 * | |
| b* (yellowness) | 17.68 ± 0.88 | 22.95 ± 1.04 | 0.003 * | |
| Transparency (%) | 92.10 ± 0.21 | 88.05 ± 0.17 | <0.001 * | |
Results expressed as mean ± SD; * indicates a significant result (p-value < 0.05).