Table 1 Mechanical and physical properties of the 3-layer and 7-layer hermetic bags.
Property | Unit | Method | Value (Mean \(\pm\) SD) | |
|---|---|---|---|---|
3 layers, 120 μm | 7 layers, 150 μm | |||
Average thickness | µm | DIN 53,370 | 120.7 \(\pm\) 1.27 | 151 \(\pm\) 2.00 |
2 SEGMA thickness tolerance | % | 4.7 \(\pm\) 0.9 | 2.1 \(\pm\) 0.10 | |
Width | mm | Internal | 442 \(\pm\) 0.00 | 442 \(\pm\) 0.00 |
Coefficient of friction | ||||
Out/out | – | 0.38 \(\pm\) 0.03 | 0.32 \(\pm\) 0.03 | |
IN/IN | 0.19 \(\pm\) 0.01 | 0.44 \(\pm\) 0.03 | ||
NTR/M | – | – | – | |
Surface tension | Dyn/CM | DNI ISO 8296 | 38 \(\pm\) 0.00 | 38 \(\pm\) 0.00 |
Tensile strength at break MD | Mpa | ASTM D882 | 46.6 \(\pm\) 4.01 | 41.0 \(\pm\) 1.00 |
Tensile strength at break TD | Mpa | 43.4 \(\pm\) 2.45 | 37.0 \(\pm\) 1.00 | |
Tensile strength at yield MD | Mpa | 17.3 \(\pm\) 2.06 | 16.5 \(\pm\) 0.50 | |
Tensile strength at yield TD | Mpa | 21 \(\pm\) 0.70 | 567.5 \(\pm\) 7.50 | |
Elongation at break MD | % | 531.7 \(\pm\) 47.15 | 562.5 \(\pm\) 12.83 | |
Elongation at break TD | % | 563.2 \(\pm\) 33.68 | 537.5 \(\pm\) 12.50 | |
Elongation at yield MD | % | 7.3 \(\pm\) 0.55 | 13.5 \(\pm\) 0.50 | |
Elongation at yield TD | % | 7.8 \(\pm\) 0.51 | 13.5 \(\pm\) 0.50 | |
Oxygen permeability | Cc/m2/day | ≤ 450 | ≤ 0.1 | |
Water vapour permeability | g/m2/day | ≤ 2 | ≤ 1 | |
