Patent ID: 11059754

Abstract:
A honeycomb structure includes plugged honeycomb segments, bonding layers and a circumferential wall. The bonding layers includes bottomed-hollow unbonded portions, which extend toward an internal side in an axial direction from an end face of the honeycomb structure, in portions of circumferential bonding layers bonding the honeycomb segments on an outermost circumference. The unbonded portions exist on respective extended lines extending from an intersection of the bonding layers which is closest to a centroid of the end face. An opening length of the unbonded portion is 1 to 10 mm, a ratio of an opening depth of the unbonded portion to a length of the honeycomb segment is 10 to 45%, and a ratio of a distance from the circumferential wall to a point at which an open end of the unbonded portion ends to a length of the circumferential bonding layer is 5 to 100%.