| 摘要 |
The invention relates to a moisture-adaptive vapour retarder with at least one moisture-adaptive functional layer, which is formed from a material which has a water-vapour diffusion resistance that decreases with increasing humidity in the atmosphere surrounding the vapour retarder in such a way that the vapour retarder has a water-vapour diffusion resistance of 2 m of diffusion-equivalent air layer thickness (sd value) and above in the case of a humidity of 30-50% and a water-vapour diffusion resistance < 1 m of diffusion-equivalent air layer thickness in the case of a humidity of 60% or more. In this case, hydrophobic or hydrophilic agents are incorporated in the moisture-adaptive functional layer of the vapour retarder and/or the moisture-adaptive functional layer is provided with a coating which has hydrophobic or hydrophilic agents in such a way that the moisture-adaptive functional layer of the vapour retarder has a water-vapour diffusion resistance > 4 m of diffusion-equivalent air layer thickness, preferably > 5 m, particularly preferably > 10 m, in the case of an ambient humidity of up to 50% and a water-vapour diffusion resistance < 1 m of diffusion-equivalent air layer thickness in the case of an ambient humidity of 70% or more. |
