INORGANIC STAPLE FIBER ACCUMULATION FOR HOLDING MATERIAL, PROCESS FOR PRODUCING THE SAME AND HOLDING MATERIAL

摘要

An accumulation whose fiber deterioration is low even at long-term compression holding performed while heating at about 1000ºC; and a holding material, such as a catalyst support of catalyst converter or a honeycomb body of DPE, comprising the accumulation. In particular, an inorganic staple fiber accumulation for holding material, comprising an accumulation of inorganic staple fibers whose chemical composition comprises 74 to 86 mass% of alumina component and 26 to 14 mass% of silica component and whose mineral composition comprises 15 to 60 mass% of mullite, wherein the accumulation exhibits an average fiber diameter of 2 to 8 mum, 99% or more (including 100%) of the fiber count composed of fibers of 1.5 to 15 mum diameter, and exhibits a specific surface area of 10 m<2>/g or less; a process for producing the same; and a holding material comprising a sheet molding comprising the accumulation having an organic binder incorporated therein characterized in that the inorganic staple fibers are employed.