| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated film which shows a high permeability of carbon dioxide gas and a low permeability of water vapor and a high ratio between the permeability of a carbon dioxide gas (CO2 TR) and the permeability of oxygen gas (O2 TR) and further, a selective permeability of carbon dioxide gas. SOLUTION: The laminated film with a selective permeability of carbon dioxide gas is formed of at least three layers such as an outer layer, an intermediate layer and an inner layer, the thickness of the outer layer being 20 to 75μm. In addition, the laminated film has selective permability of the carbon dioxide gas and shows that the ratio (CO2 TR/O2 TR) between the permeability of carbon dioxide gas (CO2 TR) and the permeability of oxygen gas (O2 TR), is 10 or more and the CO2 TR is 10,000 cm<3> /m<2> .day.atm or more and the permeability of water vapor (WVTR) is 40 g/m<2> .day or less.
|
