Multi-Layer Composite Film for the Construction Sector
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United States of America Patent
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Issued Date -
Feb 9, 2017
app pub date -
Jul 28, 2016
filing date -
Aug 5, 2015
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Abstract
A multi-layer composite film is 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, and a water-tight and water-vapor-permeable functional layer. The material of the functional layer has TPU, particularly consists of TPU. The TPU is a TPU of the carbonate type, and that the functional layer is extruded onto the carrier layer, so that the carrier layer and the functional layer are connected with one another by the extrusion process.
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