Abstract: The present invention discloses a retaining seal member including a sheet material formed of an inorganic fiber. The sheet material has a protruding part on one end and a notch part on the other end. The protruding part and the notch part are engageable with each other. The protruding part includes a corner area having a rounded distal end. The notch part includes a side area having a rounded distal end.

Abstract: The present invention discloses a retaining seal member including a sheet material formed of an inorganic fiber. The sheet material has a protruding part on one end and a notch part on the other end. The protruding part and the notch part are engageable with each other. The protruding part includes a corner area having a rounded distal end. The notch part includes a side area having a rounded distal end.

Abstract: A holding and sealing member for use in an exhaust emission control device is disclosed that holds an exhaust gas treatment member. The holding and sealing member comprises a sheet member that is made of inorganic fibers and has a first surface and a second surface. The first and second surfaces are corrugated such that the corrugation height of the first surface is greater than the corrugation height of the second surface.

Abstract: An object of the invention is to provide a holding and sealing mat material of a catalytic converter for purifying an exhaust gas which can prevent inorganic fibers from flying in all directions from a surface of the holding and sealing mat material, and can keep a working environment at a time of assembling good. In the holding and sealing mat material of a catalytic converter for purifying an exhaust gas, which is arranged between a catalyst carrier and a shell covering the catalyst carrier from the outside thereof, the holding and sealing mat material includes a mat-like material consisting of inorganic fibers and being formed in a mat shape and a binder of 0.5 to 20 weight % of an organic binder or an inorganic binder, which is attached to the mat-like material, wherein a filling bulk density of the holding and sealing mat material after being assembled is within a range between 0.1 and 0.

Abstract: An object of the invention is to provide a holding and sealing mat material of a catalytic converter for purifying an exhaust gas which can prevent inorganic fibers from flying in all directions from a surface of the holding and sealing mat material, and can keep a working environment at a time of assembling good. In the holding and sealing mat material of a catalytic converter for purifying an exhaust gas, which is arranged between a catalyst carrier and a shell covering the catalyst carrier from the outside thereof, the holding and sealing mat material includes a mat-like material consisting of inorganic fibers and being formed in a mat shape and a binder of 0.5 to 20 weight % of an organic binder or an inorganic binder, which is attached to the mat-like material, wherein a filling bulk density of the holding and sealing mat material after being assembled is within a range between 0.1 and 0.