公开(公告)号：US11590444B2

公开(公告)日：2023-02-28

申请号：US17656032

申请日：2022-03-23

申请人： NGK Insulators, Ltd.

发明人： Takashi Aoki ,  Yasuyuki Furuta ,  Takahiro Honda ,  Koji Kuzutani

IPC分类号： B01D46/24 ,  B01J35/04

摘要： A honeycomb filter includes a pillar-shaped honeycomb substrate having a porous partition wall and a plugging portion provided so as to plug end at any one of the inflow end face side or the outflow end face side of the cell, wherein in a section orthogonal to the extending direction of the cell, the shape of the cell is hexagonal, the partition wall includes a first partition wall disposed between the inflow cell and the outflow cell and a second partition wall disposed between the inflow cells, and the first partition wall has a porous trapping layer on its surface for trapping particulate matter in exhaust gas, and the second partition wall has no trapping layer on its surface or has a trapping layer thinner than the trapping layer disposed on the surface of the first partition wall.