Is a
Patent attributes
Patent Applicant
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Lichih R. Peng0
Date of Patent
March 8, 2005
0Patent Application Number
102195340
Date Filed
August 15, 2002
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A roofing membrane includes a substrate sheet formed of a thermoplastic vulcanizate (TPV) and a film layer of thermoplastic polyolefin (TPO) adhered to at least one surface of the substrate sheet. The TPV preferably includes a copolymer of ethylene and a carbonyl containing monomer dynamically vulcanized in a polyolefin thermoplastic, preferably metallocene-catalyzed polyethylene. A scrim reinforcement layer is optionally embedded in the TPV layer. When installed on a roof substrate, the membrane can be sealed by heat welding the seams of the membrane sheets.
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