Process for the production of an underlay for roofs
AssigneeEwald Doerken AG
InventorsNorbert Klingelhage, Rüdiger Laur, Jörn Schröer
Life of this patent
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Abstract
A method is provided for the production of an active-breathing composite in the form of a web, consisting of a nonwoven made of synthetic material and a layer fully or mainly consisting of polyurethane for utilization as counter ceiling webs for roofs and as facade webs. PU or a mixture of materials with a high fraction of PU is heated to melting temperature and extruded on a nonwoven made of PP in order to form a diffusion-open coating of the PP nonwoven and then pressing the PP nonwoven in order to form an active-breathing composite.
Claims15
Process for the production of an actively-breathing composite in the form of a web consisting of a nonwoven made of synthetic material and a layer comprising polyurethane (PU) for utilisation as an underlay for roofs and as a façade web, comprising the steps of
- heating a product or a layer comprising PU to melting temperature and
- extruding the heated product or layer onto a nonwoven consisting of polypropylene (PP) in order to form a diffusion-permeable coating of the PP nonwoven, and
- pressing the heated product or layer to the PP nonwoven to form an actively-breathing composite, and further comprising
- providing a bonding agent between the product or layer and the nonwoven during the production of the composite, wherein the providing step comprises
- applying the bonding agent to the nonwoven in a molten state to provide a bonding agent coated nonwoven such that the extruding step applies the heated product or layer onto the bonding agent coated nonwoven.
Process for the production of an actively-breathing composite in the form of a web consisting of a nonwoven made of synthetic material and a layer comprising polyurethane (PU) for utilization as an underlay for roofs and as a façade web, comprising the steps of:
- heating a product or a layer comprising PU to melting temperature;
- extruding the heated product or layer onto a nonwoven consisting of polypropylene (PP) in order to form a diffusion-permeable coating of the PP nonwoven;
- and
- pressing the heated product or layer to the PP nonwoven to form an actively-breathing composite, and further comprising
- providing a bonding agent between the product or layer and the nonwoven during the production of the composite, wherein the providing step comprises
- mixing the bonding agent with PU to form a PU bonding agent blend and extruding the PU bonding agent blend onto the nonwoven as the product to form the underlay for roofs or the façade web.
Dependencies are inferred from the claim text.