Patent ID: 9376814
Filing Date: 2016-06-28
CPC Classification: B32B,E04C,Y10T

Claim Text:
1. A pipe insulation product comprising: a tubular core of insulating material, the tubular core comprising: a length and a longitudinal axis; a substantially cylindrical outer surface; a substantially cylindrical inner surface; and 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 slit extending completely there through, the slit extending parallel to the longitudinal axis of the tubular core for the length of the tubular core; and a laminate that is coextensive with and bonded to the substantially cylindrical outer surface of the tubular core and flexible so that the tubular core and laminate can be opened, placed about a pipe, and closed without degrading the laminate, the laminate comprising: a metallized polymeric film sheet layer forming an inner layer of the laminate, wherein the metallized polymeric film sheet layer is bonded to the substantially cylindrical outer surface of the tubular core, and wherein the metallized polymeric film sheet layer provides a fluid vapor barrier to minimize fluid vapor transmission through the laminate; a porous kraft paper sheet layer positioned directly adjacent and bonded to the metallized polymeric film sheet layer, wherein the porous kraft paper sheet layer is pre-saturated with a flame retardant additive; a scrim comprising a mesh of a plurality of fibers positioned directly adjacent and bonded to the porous kraft paper sheet layer, wherein at least one of the scrim and porous kraft paper sheet layer provide reinforcement for the laminate; a polymeric film sheet layer positioned directly adjacent and bonded to the scrim, the polymeric film sheet layer forming an outer exposed layer of the laminate; and a latex based adhesive applied between each of the adjacent layers and saturated within the porous kraft paper sheet layer, wherein the latex based adhesive bonds the metallized polymeric film sheet layer, the scrim, the porous kraft paper sheet layer, and the polymeric film sheet layer together, the latex based adhesive comprising an additional flame retardant additive that saturates and remains within the porous kraft paper sheet layer to provide flame and smoke propagation resistance to the polymeric film sheet layer even though the flame retardant additive is not present within the polymeric film sheet layer.