Patent ID: 7208214
Filing Date: 2007-04-24
Classification: B01D,B28B,B29C,B29L,F01N,Y10T

Abstract:
1. A honeycomb structural body having a plurality of cells to function as a passage for a fluid divided by porous partition walls, specified cells being plugged at one of two end faces and the remaining cells being plugged at other end face alternately, a fluid flowing into an unplugged end face side of one set of cells being caused to pass through the cells and permeate through the partition walls, thus permeated fluid being discharged from an unplugged end face side of the other cells, wherein a cross-section pattern of the partition walls perpendicular to flow direction of the fluid has a grille shape of which gratings cross in x axis and y axis directions, and there are at least two kinds of cells different from each other in their cross-sectional areas perpendicular to the flow direction of a fluid to be filtered due to different interval pitches of the partition walls in the x axis direction and/or different interval pitches of the partition walls in the y axis direction, wherein, in the cross-section pattern, each partition wall constitutes a straight line extending across an entire area of the cross-section pattern.