Patent ID: 8764872
Filing Date: 2014-07-01
Classification: B01D,C04B

Abstract:
1. A honeycomb filter comprising: a honeycomb base material including a porous partition wall parent material to partition and form a plurality of cells which define through channels of a fluid; plugged portions arranged in open frontal areas of predetermined cells in an end surface on an inflow side of the fluid and open frontal areas of the remaining cells in an end surface on an outflow side of the fluid; and a porous collecting layer disposed on the surface of the partition wall parent material in at least the remaining cells; wherein the collecting layer has a constitution in which a plurality of particles combine or intertwine with one another; wherein the collecting layer includes particles having an average fiber diameter of 0.1 to 15 μm and an average aspect ratio of 3 or larger; and wherein an open area ratio of the surface of the collecting layer is in a range of 20% or larger to less than 50%.