| 摘要 |
<p>An object of the present invention is to provide a honeycomb structured body capable of improving a performance of purifying particulates and the like, and preventing an increase in the pressure loss upon collecting particulates. The honeycomb structured body of the present invention is a pillar-shaped honeycomb structured body comprising a large number of through holes that are longitudinally placed in parallel with one another with a partition wall therebetween, wherein the large number of through holes include a group of large-capacity through holes being sealed at one side of an end portion of the honeycomb structured body, so that the sum of areas on a cross section perpendicular to the longitudinal direction is made relatively larger, and a group of small-capacity through holes being sealed at the other side of the end portion of the honeycomb structured body, so that the sum of areas on the cross section is made relatively smaller, and when an aperture rate which is a ratio at which the area of the group of large-capacity through holes accounts for the total area of the end face on the inlet-side of the honeycomb structured body is represented by ± (%), and a difference in thickness on the cross section between: the portion of the partition wall that separates adj acently located through holes forming the group of large-capacity through holes from each other; and the portion of the partition wall that separates adjacently located through holes, one of which is constituting the group of large-capacity through holes and the other of which is constituting the group of small-capacity through holes, is represented by ² (mm) , relationships indicated by the following inequalities (1) and (2) are satisfied: 0.0022 ± + 0.0329 ‰¤ ² ‰¤ 0.0071 ± + 0.2553 and 36 ‰¤ ± ‰¤ 60</p> |
