Patent ID: 8435320
Filing Date: 2013-05-07
Classification: B01D,C04B,F01N,Y02T

Abstract:
1. A ceramic honeycomb filter comprising a honeycomb structure having a large number of flow paths partitioned by porous cell walls; and plugs formed in the flow paths alternately on the exhaust gas inlet and outlet sides; a bulk density of said ceramic honeycomb filter being less than 0.5 g/cm 3 ; the thickness W (mm) and permeability κ (μm 2 ) of the cell wall, the length L (mm) and cross section area A (mm 2 ) perpendicular to the length direction of the flow path, and the length L (mm) and the cross section area S (mm 2 ) perpendicular to the length direction of the honeycomb filter, the meeting the following relations: wherein a foam resin of a pore-forming material is added to a moldable material to adjust the permeability.