Patent ID: 9289711
Filing Date: 2016-03-22
CPC Classification: B01D

Claim Text:
1. A plugged honeycomb structure comprising: a honeycomb structure body having porous partition walls with which a plurality of cells extending from an inflow side end surface to an outflow side end surface are formed to define through channels of a fluid, said plurality of cells including inflow cells and outflow cells; outflow side plugged portions arranged in open frontal areas of predetermined cells at the outflow side end surface; and inflow side plugged portions arranged in open frontal areas of the remaining cells at the inflow side end surface, wherein a shape of the cells in a cross section perpendicular to an extending direction of the cells is a hexagonal shape, and when among six corner portions of each of the hexagonal cells, a corner portion between two sides which are two partition walls constituting the corner portion and at least one of which is a partition wall separating inflow cells or outflow cells from each other is a specific corner portion, and a corner portion between two sides which are two partition walls constituting the corner portion and each of which is a partition wall separating an inflow cell and an outflow cell is an unspecific corner portion, the inflow cells being open at the inflow side end surface and being plugged with the outflow side plugged portions at the outflow side end surface, the outflow cells being open at the outflow side end surface and being plugged with the inflow side plugged portions at the inflow side end surface, at least one of the specific corner portions is provided with a reinforcing portion so that a shape of the specific corner portion is rounded, and the unspecific corner portions are not provided with the reinforcing portions.