Patent ID: 8636869
Filing Date: 2014-01-28
Classification: B32B,F16L,Y10T

Abstract:
1. A method for lining a cavity of a passageway or pipe comprising introducing a liner into said cavity; said liner comprising: (a) a resin absorbent material layer; (b) a thermoset resin absorbed into said resin absorbent material layer; (c) a polyester thermoplastic polyurethane coating layer on at least one side of said resin absorbent material layer; wherein said polyester thermoplastic polyurethane coating layer is made from the reaction consisting essentially of (i) a hydroxyl terminated polyester intermediate, (ii) a glycol chain extender, and (iii) a diisocyanate; wherein said thermoplastic polyurethane coating layer has a DSC 2 introducing steam or water into the inner opening of said liner to force the said liner against the inner surface of said passageway or said pipe and to activate the cure of said thermoset resin.