Patent attributes
There is disclosed a plugged honeycomb structure capable of suppressing a rise of a pressure loss. A plugged honeycomb structure 1 of the present invention comprises a columnar honeycomb structure 2 having porous partition walls 4 and a plurality of cells 5 which are defined by the partition walls 4 and which extend through the structure from one end surface 7a to the other end surface 7b thereof; a plurality of first plugging members 3a which plug openings of predetermined cells 5a on a side of the one end surface 7a; and a plurality of second plugging members 3b which plug openings of the remaining cells 5b on a side of the other end surface 7b. In the plugged honeycomb structure 1, the first plugging member 3a includes a convex portion 6 having a shape convex toward the center of the cell 5 in an axial direction on an end portion of the member on a side opposite to the end surface 7a in which the cell 5a to be plugged is opened.
