Table 2.
Barrier and mechanical requirements of commercial synthetic food packages for different types of food; thickness was approximately between 15 and 25 µm [37,38,39].
| Food Product | Shelf Life, Months | MTR, g/m2 Day (23 °C, RH = 85%) |
OTR, cm3/m2 Day Bar (23 °C, RH = 75%) |
TS, MPa | e, % | Commercial Packages |
|---|---|---|---|---|---|---|
| Low Moisture Food | ||||||
| Nuts, snacks | 3–12 | 0.093–3.0 | 0.16–9.6 | 20–80 | 100–600 | Laminates of PP with EVOH, PP; Metallization of PP |
| Coffee | 12–18 | 0.61–1.1 | 0.87–1.3 | 30–80 | 40–600 | PP or PET metallized or AL foil laminates |
| Other dried foods | 12–24 | 0.14–1.7 | 0.068–0.82 | 30–80 | 100–600 | Laminates of PP or PET with EVOH |
| Oils | >12 | <30 | 2.6–26 | 45–75 | 40–600 | PET |
| High Moisture Food | ||||||
| Cheese | 2 | 50 | 86–345 | 20–40 | 100–1000 | PP, HDPE |
| Fat | 3 | 5.2–9.2 | 6.8–80 | 30–40 | 100–600 | PP |
| Retorted food | 3–36 | 0.40–7.6 | 0.59–5 | 30–80 | 100–600 | Laminates of PET or PP with EVOH or polyamide |
| Fruits, vegetables, and salads | 0.25 | 10–4000 | 10,000–200,000 | 7–40 | 200–900 | LDPE, PP |
| Meat and meat-based products | 0.25–0.5 | 2–100 | 20–10,000 | 45–75 | 40–100 | PS and PET trays |