| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a ceramic honeycomb filter in which desired flow paths of flow paths on an inflowing side and an outflowing side of a ceramic honeycomb filter structure are sealed at a sealing portion, and the sealing portion located on the inflowing side is disposed apart from an end surface on the outflowing side, wherein breakage caused by thermal stress between the sealing portion and a partition wall in connection with thermal expansion and shrinkage when recycling the filter by burning PM (particulate matter) can be prevented, and can maintain a collection efficiency of PM. <P>SOLUTION: In the ceramic honeycomb filter, flow paths having no sealing portion in flow paths to be sealed at the sealing portion are 0.03 to 1.5% of the flow paths to be sealed at the sealing portion. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
