FIELD: construction.
SUBSTANCE: invention relates to multilayer composite film (1) for construction, in particular a roof underlay sheet, underlay sheet or facing sheet. Multilayer composite film (1) for construction with at least one water and vapour permeable nonwoven material comprises polyester filaments as backing layer (2) and waterproof and vapour permeable functional layer (3), wherein the material of functional layer (3) contains TPU (thermoplastic urethane), in particular consists of TPU, wherein the TPU is a carbonate type TPU and functional layer (3) is extruded onto a backing layer (2), so that backing layer (2) and functional layer (3) are joined to each other in an extrusion process.
EFFECT: multilayer composite film is disclosed.
17 cl, 8 dwg, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| ROOFING INSULATION | 2015 |
|
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| FILM-FORMING RADIATION-CURABLE ADHESIVE | 2011 |
|
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