| 摘要 |
<p>The membrane vapor barrier comprises an active layer having permeability to water vapor, which increases relative humidity surrounding, where the active layer is formed by a central sub-layer of a random copolymer of ethylene and vinyl alcohol, and two outer sub-layers made of polyamide. The ethylene vinyl alcohol comprises 44-50 mole% of ethylene units. The barrier further comprises an air-permeable support layer present in direct contact with the active layer. The support layer is made of nonwoven air-permeable textile. A weight ratio of ethylene and vinyl alcohol/polyamide is 15:85-40:60. The membrane vapor barrier comprises an active layer having permeability to water vapor, which increases relative humidity surrounding, where the active layer is formed by a central sub-layer of a random copolymer of ethylene and vinyl alcohol, and two outer sub-layers made of polyamide. The ethylene vinyl alcohol comprises 44-50 mole% of ethylene units. The barrier further comprises an air-permeable support layer present in direct contact with the active layer. The support layer is made of nonwoven air-permeable textile. A weight ratio of ethylene and vinyl alcohol/polyamide of the active layer is 15:85-40:60. A thickness of the active layer is 30-65 mu m. The active layer is formed of 50 wt.% relative to the membrane. The active layer has a basis weight of 30-150 g/m 2>. An independent claim is included for a method for increasing airtightness of a building or a room.</p> |
