Patent ID: 7008461
Filing Date: 2006-03-07
Classification: B01D,B01J,B29C,C04B,F01N,Y02T,Y10S,Y10T

Abstract:
1. A honeycomb structure comprising: a plurality of through channels extending in an axial direction of the honeycomb structure, porous partition walls separating through channels one another, and plugging portions; said plugging portion plugging predetermined through channels at one end and the rest of through channels at other end opposite to the plugged end of the predetermined through channels, wherein a through-hole is formed in at least a part of the plugging portion, and a diameter of the through-hole is 0.2 mm or more, but not more than a value which is the lesser of 1 mm and 75% of a diameter of an inscribed circle of the through channel, and wherein a sectional area of the through-hole of the plugging portion in the vicinity of an outer peripheral portion of the honeycomb structure is larger than that of the through-hole of the plugging portion in a central portion of the honeycomb structure.