Holding sealing material, method for manufacturing holding sealing material and exhaust gas purifying apparatus

摘要

An object of the present invention is to provide a holding sealing material which has high shear strength and an excellent winding ability and enables a reduction of an amount of a binder contained therein. The holding sealing material of the present invention comprises a needle mat including entangled first inorganic fibers and a binder; and a sheet-processed mat including second inorganic fibers processed into a sheet and a binder, the needle mat and the sheet-processed mat being laminated together, wherein staple fibers having a shorter average fiber length than an average fiber length of the second inorganic fibers are localized in an interface area extending from an interface between the needle mat and the sheet-processed mat into the needle mat, and a binder content of the interface area is higher than a binder content of the needle mat in terms of weight ratio.