| 摘要 |
<p>A honeycomb filter 20 includes a plurality of porous partition portions 22 each forming a cell 23, the cell 23 being open at one end and closed at the other end and serving as a flow path of an exhaust gas, and a trapping layer 24 for trapping and removing solid components contained in the exhaust gas, the trapping layer 24 being formed on each of the partition portions 22. In a honeycomb segment 21, the trapping layers 24 are formed such that the ratio A/B of the thickness A ( µ m) of the trapping layer 24 formed on each of outermost partition portions 22a to the thickness B ( µ m) of the trapping layer 24 formed on each of partition portions 22b in an inner region is 60% or less.</p> |
