Pollution control element-retaining member and pollution control device

摘要

A pollution control element-retaining or -mounting member ( 2 ) for mounting a pollution control element ( 1 ) within a casing and that shows good canning operability, that is not separated from the pollution control element during the canning operation, and that is excellent in one, some or all of heat resistance, an aerial pressure retaining property and erosion resistance. The pollution control element-mounting member ( 1 ) comprises a mat ( 2 ) containing fiber material, with the mat having a thickness with an external portion ( 2 a) having an external peripheral surface for contacting the casing ( 4 ) and an internal portion ( 2 b) having an internal peripheral surface for contacting the pollution control element ( 1 ). At least the internal peripheral surface of the internal portion, and optionally the external peripheral surface of the external portion, ( 2 a) is impregnated with a friction/adhesion controlling agent ( 3 ) such that the coefficient of friction between the external peripheral surface and the casing ( 4 ) is lower than the coefficient of friction between the internal peripheral surface and the pollution control element ( 1 ). The friction/adhesion controlling agent ( 3 ) can decompose and dissipate under operating conditions of the pollution control element ( 1 ).