Invention Grant
- Patent Title: Honeycomb filter
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Application No.: US16815488Application Date: 2020-03-11
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Publication No.: US11260384B2Publication Date: 2022-03-01
- Inventor: Fumihiko Yoshioka
- Applicant: NGK Insulators, Ltd.
- Applicant Address: JP Nagoya
- Assignee: NGK Insulators, Ltd.
- Current Assignee: NGK Insulators, Ltd.
- Current Assignee Address: JP Nagoya
- Agency: Burr & Brown, PLLC
- Priority: JPJP2019-066132 20190329
- Main IPC: B01J35/04
- IPC: B01J35/04 ; B01D53/88 ; C04B38/00

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 a porous plugging portion provided either at an end on the inflow end face or the outflow end face of the cells, wherein the plugging portion is 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, porosity of a central plugging portion in the central region is lower than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portions ranges from 60% to 68%, and that of the circumferential plugging portions ranges from 70% to 85%.
Public/Granted literature
- US20200306738A1 HONEYCOMB FILTER Public/Granted day:2020-10-01
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