Patent ID: 7259117

Claim:
A nonwoven highloft flame barrier for use in mattresses, upholstered furniture, fiber-filled bed clothing, transportation seating and the like comprising a blend of the following: (a) 10-85% by weight of inherently flame retardant fibers selected from the group consisting of melamines, meta-aramids, para-aramids, polybenzimidazole, polyimides, polyamideimides, partially oxidized polyacrylonitriles, novoloids, poly(p-phenylene benzobisoxazoles), poly(p-phenylene benzothiazoles), polyphenylene sulfides, flame retardant viscose rayons, polyetheretherketones, polyketones, polyetherimides, and combinations thereof; (b) 10-85% by weight modacrylic fibers; (c) the combination of inherently flame retardant fibers and modacrylic fibers having a combined weight of at least 40% of the blend; (d) up to 30% of low melt binder fibers; and (e) the fibers being blended and processed by non-mechanical bonding in such a manner as to produce a blend having a greater volume of air than fiber and a bulk density in the range of 5-50 kg/m 3 .