Patent ID: 7749923

Claim:
A faced pipe insulation product comprising: a tubular core of fibrous insulation having a length and a longitudinal axis; the tubular core having a substantially cylindrical outer surface; the tubular core having a substantially cylindrical inner surface; the tubular core having a wall extending between the cylindrical outer surface and the cylindrical inner surface; the wall of the tubular core having a radially extending thickness; the wall of the tubular core having a first slit extending completely there through; the first slit extending parallel to the longitudinal axis of the tubular core for the length of the tubular core; the tubular core having a second slit in the inner surface of the tubular core; the second slit being substantially opposite the first slit; the second slit extending parallel to the longitudinal axis of the tubular core for the length of the tubular core; and the second slit extending only partially through the wall of the tubular core to form a longitudinally extending hinge in the tubular core that permits the tubular core to be opened and closed to place the tubular core about a pipe; and a facing laminate; the facing laminate being coextensive with and bonded to the substantially cylindrical outer surface of the tubular core and flexible so that the tubular core with the facing can be opened, placed about a pipe, and closed without degrading the facing laminate; the facing laminate consisting of: a foil or metalized polymeric film sheet layer forming an inner layer of the laminates that is bonded directly to the substantially cylindrical outer surface of the tubular core; a kraft paper sheet layer having only cellulose fibers and forming an outer exposed layer of the laminate; a scrim intermediate the foil or metalized polymeric film sheet layer and the kraft paper sheet layer, an adhesive bonding the foil or metalized polymeric film sheet layer, the kraft paper sheet layer and the scrim together; and the kraft paper sheet layer of the laminate having between 0.1% and 10% by dry weight a humectant for inhibiting the absorption of moisture by fibers of the kraft paper sheet layer to thereby provide the kraft paper sheet layer with greater dimensional stability and reduce wrinkling of the kraft paper sheet layer when the laminate is exposed to conditions of high humidity; wherein the humectant comprises at least one substance selected from the group consisting of glycerin, ethylene glycol, polyethylene glycol, and isopropylene glycol.