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Food Package Engineering 345

O Permeability Water Vapor
2
3
cm mil/100 CO Permeability Permeability
2
3
2
2
in day atm at cm mil/100 in 2 g mil/100 in day
Polymer 25°C day atm at 25°C at 38°C, 90% RH
LDPE ∗ 300–600 1200–3000 1–2
HDPE † 100–250 350–600 0.3–0.6
PP (unoriented) † 150–250 500–800 0.6–0.7
PP (oriented) † 100–160 300–540 0.2–0.5
PS † 250–350 900–1050 7–10
PET † 3–6 15–25 1–2
PVC (unplasticized) † 5–15 20–50 2–5
PVC (plasticized) ∗ ,† 50–1500 200–8000 15–40
PVDC † 0.1–2 0.2–0.5 0.02–0.6
EVOH (0% RH) † 0.0007–0.1 0.01–0.5 —
EVOH (100% RH) † 0.2–3 4–10 —
Ionomer † 300–450 — 1.5–2
Nylon 6 † 2–3 10–12 10–20
PC † 180–300 — 10–15
Polysulfone ‡ 230 950 45
PVOH ‡ 0.05–0.2 0.1 —
PPS ‡ 30 75 1.6
Polyimide ‡ 6.5 7.5 1.4
Polyamide 0.001 2.5 —
Nanocomposite ‡
Polyvinyl fluoride ‡ 3 11 3.3
EVA ‡ 460 2800 11.5
Multilayer Films
Nylon 6-LDPE ‡ 4–5 — 0.5
HDPE-EVA-PVDC- 1.1 2.8 0.15
EVA ‡
EVOH-LDPE ‡ 0.05–0.1 — —
PP-PVDC-PP ‡ 3.55–4.55 — —
PP-EVOH-PP ‡ 0.9 — —
PS/PC-EVOH-PP ‡ 0.7 — —
HDPE-EVOH-LDPE ‡ 1.5 — —

–Data not available.
∗ Value depends on amount of plasticizer.
† Source: Data from Ref. 2.
‡ Source: Data from Ref. 8.

TABLE 11.2 Permeability Values for Various Polymers