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Gas Barrier Properties

Table 3 compares the oxygen transmission coefficient of Nylon-MXD6 film and various other polymer films. Fig. 2-1 shows how the oxygen transmission coefficient is related to humidly. Nylon-MXD6 shows greater gas-barrier characteristic against oxygen than other polymers such as Nylon 6, PET and acrylnitrile co-polymerized resin. Fig. 2-2 shows the oxygen transmission coefficient in a high humidity environment. Nylon-MXD6 retains its excellent gas-barrier characteristic even under high humidity. Nylon-MXD6 is especially useful since it retains its gas-barrier qualities after retorting.

Table 3 Oxygen Transmission Coefficient of Various Polymer Films
Films Oxygen Perameation rate
(cc/m2·day·atm)20µm, 23℃
60%RH 80%RH 90%RH
Nylon-MXD6 (oriented:4 x 4) 2.8 3.5 5.5
Nylon-MXD6 (Non-oriented) 4.3 7.5 20
Ethylene Vinylalcohol Copolymer
(Ethylene:32mol%)
0.5 4.5 50
Ethylene Vinylalcohol Copolymer
(Ethylene:44mol%)
2.0 8.5 42.5
Acrylonitrilecopolymer 17 19 22
Nylon 6 (oriented) 40 52 90
Nylon 6
(oriented, PVDC coated)
10 10 10
Polyethylene Terephthalate
(oriented)
80 80 80
Polypropylene (oriented) 2,500 2,500 2,500
Polypropylene (PVDC Coated) 14 14 14

Fig.2-1 Humidity Dependent Oxygen Permeability of Various Polymers (23℃)

Gas Barrier Properties1

Fig.2-2 Oxygen Permeability of Various Polymers under High Humidity (23℃)

Gas Barrier Properties2

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