FILTRE EN NID D'ABEILLE ET SON PROCÉDÉ DE FABRICATION

摘要

There is disclosed a honeycomb filter which can suppress the increases of an initial pressure loss and a pressure loss when a particulate matter is deposited. There is provided a honeycomb filter including: a honeycomb base material including a porous partition wall parent material to partition and form a plurality of cells which become 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. The collecting layer has a constitution in which a plurality of particles combine or intertwine with one another, and the collecting layer includes fibrous fiber particles as the plurality of particles, and includes the particles having an average fiber diameter of 0.1 to 15 µm and an average aspect ratio of 3 or larger. An open area ratio of the surface of the collecting layer is 20% or larger.