Patent ID: 8603927

Claim:
Fibrous wet laid nonwoven mat for laminating to a layer of a material selected from a group consisting of a foam, a concrete, a gypsum wallboard, a gypsum containing material, and a ceramic material, the mat having a Frazier air permeability in the range of about 50 to about 1500, comprising; a) fibers, being non-cellulosic fibers, and being selected from a group consisting of glass fibers, ceramic fibers, carbon fibers and synthetic organic fibers, b) the fibers bound together with about 5 to about 25 wt. percent of a cured resin binder in the fibrous nonwoven mat, the mat having a first surface and a second surface opposite the first surface with the first surface being smoother than the second surface that is on the backside of the mat opposite the first surface and rougher relative to the smoother first surface, the first surface being either a surface of the wet laid nonwoven mat of the fibers bonded together with the cured resin binder or the top surface of a coating on said mat, c) the fibrous nonwoven mat having one or more surfactants and/or wetting agents on the fibers and the cured resin binder in the rougher second, backside surface, the one or more surfactants and/or wetting agents extending into only a portion of a thickness of the fibrous nonwoven mat, that portion being at least 25 percent of the thickness, but less than the entire thickness of the mat, the one or more surfactants and/or wetting agents also being on the fibers and the cured resin binder in said portion, d) the one or more surfactants and/or wetting agents being present in an amount of less than about 2 percent of the dry weight of the fibrous nonwoven mat, but in an amount effective to cause the penetration of a liquid material uniformly into the openings between the fibers in the mat.