Patent ID: 7488367
Filing Date: 2009-02-10
Classification: B01D,C04B,Y10S,Y10T

Abstract:
1. A honeycomb filter, comprising partition walls forming a plurality of cells extending in one direction, and plugging sections alternately plugging the cells at ends of the honeycomb filter, the partition walls being formed of a porous base material having a porosity of 45 to 70% measured by mercury porosimetry, wherein, when an average pore size of the base material measured by mercury porosimetry is (A) μm and an average pore size of the base material measured by a bubble point method is (B) μm, an average pore size differential rate expressed by “{(A−B)/B}*100” is 35% or less, an average pore size of the base material measured by the bubble point method is 15 to 30 μm, and a maximum pore size of the base material measured by the bubble point method is 150 μm or less.