| 摘要 |
The invention relates to a water-tight and water vapor permeable multilayer film, in particular for sealing in the roof area during home construction, with a water vapor permeable base layer made of a first plastic material and with at least one water vapor permeability-controlling second layer that is coupled to the base layer and that is made of a second plastic material. The base layer is water-tight for low surface tension water and the multilayer film is extensible and tear-resistant. The water vapor permeability-controlling second layer is inventively provided with macroscopic holes, the arrangement of which removes a defined surface area from the second plastic material so that the water vapor permeability of the multilayer film is adjusted. The invention also relates to the use of such a multilayer film as adhesive tape and/or vapor barrier and/or facade film and/or on-roof film, in particular for sealing in the roof area during home construction. The invention furthermore relates to a system that comprises the multilayer film described in the foregoing and an adhesive tape that comprises the multilayer film.
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