Honeycomb filter
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United States of America Patent
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May 1, 2018
Issued Date -
N/A
app pub date -
Jun 8, 2016
filing date -
Jul 17, 2015
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Abstract
A honeycomb filter includes a honeycomb structure body having porous partition walls defining a plurality of cells, inflow side plugging portions, and outflow side plugging portions, and in a cross section perpendicular to a cell extending direction, the whole periphery of each of outflow cells is surrounded by an inflow cell group, inflow cells are defined by inflow/outflow partition walls which are the partition walls defining the outflow cell and inflow/inflow partition walls which are the partition walls intersecting the inflow/outflow partition walls, a surface area A1 of the inflow/outflow partition wall of the inflow cell and a surface area A2 of the inflow/inflow partition wall of the inflow cell satisfy a relation of 1.2≤A1/A2≤2, and in the partition wall, an average pore diameter of a surface region is from 4 to 60% of an average pore diameter of a central region.
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