Glass fiber reinforced facer mat
Embodiments of the invention provide fiber mat facers, ceiling panels, and method of manufacturing the same. A fiber mat facer may include a non-woven web of fibers having a first group of fibers with an average fiber diameter from about 6 μm to about 20 μm and a second group of fibers with an average fiber diameter from about 0.5 μm to about 5 μm. The fiber mat facer may also include a binder to bond together the non-woven web of fibers into the fiber mat. The binder may include a water repellant additive. The binder and/or fiber mat facer may further include an additive that enhances the opacity of the fiber mat facer. The fiber mat facer may also include a paint applied to an outer surface of the facer. The paint may include an additive that enhances the visual appeal of the facer and/or ceiling panel.
1. A method for manufacturing a fiber mat facer comprising:
forming an aqueous slurry blend of a first group of fibers having an average fiber diameter from about 6 μm to about 20 μm and a second group of fibers having an average fiber diameter from about 0.5 μm to about 5 μm;
dispensing the aqueous slurry on a screen and removing a substantial portion of the aqueous solution to form a non-woven web of fibers;
applying an aqueous binder solution to the non-woven web of fibers to form a wet mat, the binder solution including between about 0.4 wt. % and 1.5 wt % of a water repellant additive and between about 0.5 wt. % and 2.0 wt % of a white pigment additive that enhances the opacity of the fiber mat facer;
curing the wet mat to form a fiber mat; and
coupling the fiber mat with a ceiling panel, the ceiling panel being for subsequent installation in a ceiling of a structure;
wherein the fiber mat includes between about 63 and 71 dry weight percent of the first group of fibers having an average fiber diameter from about 6 μm to about 20 μm and between about 8 and 16 dry weight percent of the second group of fibers having an average fiber diameter from about 0.5 μm to about 5 μm, the fiber mat having an air permeability of between about 300 and 500 cfm/ft 2 .
2. The method of claim 1 , further comprising applying paint to an outer surface of the fiber mat, wherein the binder includes either or both a repellent chemistry or dispersant chemistry that provides a surface energy of between 40 dyne/cm and 50 dyne/cm so that absorption of the pain into the fiber mat is limited and a portion of the paint remains on or near the outer surface of the fiber mat.
3. The method of claim 2 , further comprising mixing between 0.25 wt. % and 1.0 wt. % of a weak acid with the paint prior to applying the paint to the outer surface of the fiber mat.
4. The method of claim 3 , wherein the paint further comprises a binder that is reactive with the weak acid to increase the viscosity of the paint at low shear.
5. The method of claim 1 , wherein the water repellant additive comprises stearylated melamine water repellant.
6. The method of claim 1 , wherein the binder comprises sodium tetrafluoroborate.
7. The method of claim 1 , wherein the first group of fibers have an average fiber diameter of about 11 μm.
8. The method of claim 1 , wherein the second group of fibers have an average fiber diameter of about 3 μm.