Title:
ハニカムフィルタ
Document Type and Number:
Japanese Patent JP7217190
Kind Code:
B2
Abstract:
A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, and a plugging length L1 in the cell extending direction of a central plugging portion in the central region is smaller than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 3 to 6 mm, and L2 from 7 to 9 mm.
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Inventors:
Fumihiko Yoshioka
Application Number:
JP2019066134A
Publication Date:
February 02, 2023
Filing Date:
March 29, 2019
Export Citation:
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
B01D39/20; B01D46/00; B01D53/94; B01J35/04; F01N3/022
Domestic Patent References:
| JP2003269132A | ||||
| JP2015009205A |
Attorney, Agent or Firm:
Ippei Watanabe
Koike Shigeru
Koike Shigeru