Patent ID: 8460776

Claim:
An article of manufacture comprising: a cured fiberglass product comprising fibers and a binder; a flexible plastic cover encasing said fiberglass product; and a granular fire retardant composition, wherein: (i) the granular fire retardant composition is positioned between said fiberglass product and said plastic cover, (ii) the fibers are fine fibers having diameters in the range from about 1 micron to about 10 microns, (iii) the article of manufacture has a Noise Reduction Coefficient of 0.65 or higher, when tested in accordance with ASTM C 423, (iv) the article of manufacture includes the granular fire retardant composition in an amount ranging from about 0.5 grams to about 5 grams of active ingredient per square meter, (v) the flexible plastic cover is partially embedded in the fiberglass product, and (vi) the flexible plastic cover comprises a thermoplastic polymer having a molecular weight in the range from about 1×10 3 g/mole to about 5×10 6 g/mole, under the proviso that the granular fire retardant is not blended with a polymer and incorporated into a film structure.