| 摘要 |
The invention relates to a multi-layer composite film (1) for the construction sector, particularly roof liner, underlay or façade liner, having at least one water-permeable and water-vapor-permeable nonwoven having polyester filaments, as the carrier layer (2), and a water-tight and water-vapor-permeable functional layer (3), wherein the material of the functional layer (3) has TPU, particularly consists of TPU. According to the invention, it is provided that the TPU is a TPU of the carbonate type, and that the functional layer (3) is extruded onto the carrier layer (2), so that the carrier layer (2) and the functional layer (3) are connected with one another by the extrusion process. |
