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US 11,518,137 B2Granted
Roofing underlayment with hydrophobic nonwoven core
AssigneeOwens Corning Intellectual Capital, LLC
InventorMartin Vido
Life of this patent
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Abstract
A roofing underlayment includes a hydrophobic nonwoven core layer that provides enhanced resistance to water infiltration. In addition to the hydrophobic nonwoven core layer, the roofing underlayment includes a coating layer adhered to a surface of the hydrophobic nonwoven core layer, and an exterior surface layer adhered to the coating layer. A roofing system that includes the roofing underlayment is also provided.
Claims16
A roofing underlayment comprising:
- a hydrophobic nonwoven core layer having a basis weight of 100 g/m2 to 250 g/m2,
- a first coating layer adhered to a first surface of the hydrophobic nonwoven core layer, and
- a first exterior surface layer comprising a bicomponent spunbond nonwoven material having a total basis weight of 30 g/m2 to 60 g/m2 and comprising a polyolefin layer bonded to a thermoplastic elastomer layer, and wherein the polyolefin layer is adhered to the first coating layer.
A roofing underlayment comprising:
- a hydrophobic nonwoven core layer having a basis weight of 110 g/m2 to 155 g/m2;
- a first coating layer adhered to a first surface of the hydrophobic nonwoven core layer, wherein the first coating layer has a basis weight of 10 g/m2 to 40 g/m2;
- a first exterior surface layer adhered to the first coating layer, wherein the first exterior surface layer has a basis weight of 20 g/m2 to 60 g/m2;
- and
- a second exterior surface layer adhered to a second surface of the hydrophobic nonwoven core layer opposite the first surface, wherein the second exterior surface layer is a co-extruded layer comprising a thermoplastic elastomer layer having a basis weight of 2 g/m2 to 10 g/m2 and a polyolefin layer having a basis weight of 15 g/m2 to 25 g/m2,
- wherein the hydrophobic nonwoven core layer comprises from 50% to 80% of a total basis weight of the roofing underlayment.
3 more elements
Dependencies are inferred from the claim text.