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Table 9 Permeability coefficient of various materials

From: Long permanence high altitude airships: the opportunity of hydrogen

  P(He) (P(H2) P(O2)
Poly(ethylene) density 0.914 g/cm^-3 7.40E-13 3.70E-13 2.20E-13
Polyvinilecloride plasticized 10 % 1.30E-13 3.83E-16
Polyvinilacetate 4.95E-13 2.99E-13 1.36E-14
Poly(trifluorochloroethylene) film 30 % cristallinity 7.05E-14 5.10E-13 3.00E-15
Mylar A 4.88E-14 2.44E-14 3.00E-15
Nylon 6 3.98E-14 2.85E-15
Nylon 11 1.34E-13 1.46E-13
Cellophane (relative humidity 43 %) 1.20E-15 5.36E-16