Patent ID: 8916102

Claim:
A non-woven mat comprised of a blend comprised of at least 60 percent by weight magnesium aluminum silicate glass fibers and at least 10 percent by weight fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof, based on the total weight of the mat, wherein the magnesium aluminum silicate glass fibers comprise Al 2 O 3 in a range from 10 to 30 percent by weight, SiO 2 in a range from 52 to 70 percent by weight, and MgO in a range from 1 to 12 percent by weight, based on the total weight of the magnesium aluminum silicate glass fiber, and wherein the non-woven mat is collectively comprised of at least 80 percent by weight of said magnesium aluminum silicate glass fibers and said fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof, based on the total weight of the mat, and wherein the magnesium aluminum silicate glass fibers and the fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof present in the blend collectively provide the non-woven mat with a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at least 1.1 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual magnesium aluminum silicate glass fibers, amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, present in the blend of fibers.