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US 9,045,904 B2Granted
Thermoplastic membranes containing expandable graphite
AssigneeFirestone Building Products Company, LLC
InventorsMichael J. Hubbard, Wensheng Zhou, Joseph Carr
Life of this patent
Estimating the term…
Abstract
A multi-layered membrane comprising a first thermoplastic first layer and a second thermoplastic layer, where the second layer includes expandable graphite.
Claims14
A multi-layered thermoplastic membrane comprising:
- i. a first polyolefin layer where the first polyolefin layer includes at least two sublayers that are formed by co-extrusion, and where at least one of the two sublayers formed by co-extrusion includes expandable graphite;
- and
- ii. a second polyolefin layer, where the first and second polyolefin layers are laminated to one another.
A multi-layered thermoplastic membrane comprising:
- first and second polyolefin layers laminated to each other, where said first polyolefin layer includes at least two co-extruded sublayers, where the at least two co-extruded sublayers of said first polyolefin layer include a top co-extruded layer that is exposed and an internal co-extruded upper layer that forms a laminated surface with the second polyolefin layer, and where said internal co-extruded upper layer includes expandable graphite.
Dependencies are inferred from the claim text.