Invention Grant
- Patent Title: Honeycomb filter
- Patent Title (中): 蜂窝过滤器
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Application No.: US12603338Application Date: 2009-10-21
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Publication No.: US08444739B2Publication Date: 2013-05-21
- Inventor: Yukio Mizuno , Naomi Noda , Toshio Yamada , Yukio Miyairi , Yukari Nakane , Yasushi Noguchi
- Applicant: Yukio Mizuno , Naomi Noda , Toshio Yamada , Yukio Miyairi , Yukari Nakane , Yasushi Noguchi
- Applicant Address: JP Nagoya
- Assignee: NGK Insulators, Ltd.
- Current Assignee: NGK Insulators, Ltd.
- Current Assignee Address: JP Nagoya
- Agency: Oliff & Berridge, PLC
- Priority: JP2007-119198 20070427; JP2008-041126 20080222
- Main IPC: B01D50/00
- IPC: B01D50/00 ; B01D39/00 ; B01D39/06 ; B01D24/00 ; B01D39/14 ; F01N3/00

Abstract:
A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 μm to 20 μm (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg/cm2 to 6 mg/cm2 (exclusive). The base material has an average pore diameter of from 10 μm to 60 μm (exclusive) and a porosity of from 40% to 65% (exclusive).
Public/Granted literature
- US20100135866A1 HONEYCOMB FILTER Public/Granted day:2010-06-03
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