| 摘要 |
The invention illustrates and describes a sheet material (1) for the building sector, having at least one functional layer (2) and, if appropriate, at least one further layer, in particular a carrier layer and/or reinforcing layer (3), the functional layer (2) having a resistance to water-vapour diffusion (Sd value) which is dependent on the ambient humidity. According to the invention, it is provided that the functional layer (2) has at least one material (4) which can be obtained from a renewable raw material, in particular at least one polymer based on a renewable raw material. |
