| abstract |
An object of the present invention is to improve the collection performance of a solid component contained in a fluid. A honeycomb filter 20 has a pore volume difference, which is a difference in pore volume between a downstream portion and a downstream portion of 10 μm or less of the honeycomb filter, obtained from a pore distribution by a mercury intrusion method, of 0.01 cm 3 / The partition wall and the collection layer are formed in the range of g to 0.08 cm 3 / g. In the honeycomb filter, the downstream portion has a first pore volume peak in the first pore diameter range of 2 μm or more and 9 μm or less, and the second pore diameter range of 10 μm or more and 25 μm or less is larger than the first pore volume peak. 2 shows the pore volume peak. On the other hand, in the upstream portion, the second pore volume peak is shown only in the second pore diameter range of 10 μm or more and 25 μm or less. Furthermore, it is more preferable that the porosity of the upstream portion and the downstream portion of the honeycomb filter is in the range of 35% to 70%. [Selection] Figure 1 |