Abstract: A coated non-woven fibrous mat is disclosed comprising a non-woven precursor mat including a plurality of randomly oriented fibers bound by a precursor binder composition, The non-woven fibrous precursor mat has a first major surface and a second major surface opposite to and having a surface roughness greater than the first surface, defining a thickness therebetween. A coating composition is applied to the second major surface of the non-woven precursor mat and substantially uniformly penetrates 5% to less than 30% of the thickness of the non-woven precursor mat. The coating composition comprises a mineral filler and an organic latex binder composition. The coating composition is applied to the non-woven precursor mat in an amount between 1.0 and 10.0 lbs/100 ft2.

Abstract: A coated nonwoven mat includes a nonwoven base layer and a coating layer. The nonwoven base layer is formed from a plurality of fibers held together by a binder and includes a first surface and a second surface. The coating layer includes a coating composition comprising a binder component, a filler, and one or more performance modifiers. The coated nonwoven mat has an average Gurley porosity of at least 10 seconds and an average hydrostatic head performance of at least 10 mbar.