| 主权项 |
1. A dust collecting honeycomb filter comprising a honeycomb base material having porous partition walls to define and form a plurality of cells that become through channels of a fluid, and a flange section disposed on an outer periphery of the honeycomb base material and having porous flange partition walls to define and form a plurality of flange cells,
wherein an extending direction of the cells of the honeycomb base material and an extending direction of the flange cells are the same direction, the flange section is formed so as to project outwardly from the outer periphery of the honeycomb base material, the partition walls and the flange partition walls are continuously connected without forming any boundaries therein, the flange section has flange plugging portions disposed in open frontal areas of the flange cells in both end surfaces in the extending direction of the flange cells, and a length, in the extending direction of the flange cells, of the flange plugging portion positioned on the innermost side in the flange section is from 1.0 to 2.5 mm, and a length, in the extending direction of the flange cells, of the flange plugging portion positioned on the outermost side in the flange section is 3.0 mm or more. |
