HONEYCOMB FILTER

PROBLEM TO BE SOLVED: To provide a honeycomb filter where PM before combustion peeled from a partition wall in the middle of regeneration treatment does not stack excessively around the end of a cell sealed at an outlet end surface and breakage and erosion by a rapid temperature rise around the end are hardly caused.SOLUTION: In a honeycomb filter, a projection 5 projected in an outlet sealed cell 2a from a partition wall 1 demarcating the outlet sealed cell 2a at least at a part of the outlet sealed cell 2a in a region R1 between a position P1 becoming a length H2 which is 30% of the entire length H1 of a honeycomb base material 10 from an inlet end surface 11 toward an outlet end surface 12 and a position P2 becoming a length H3 which is 80% of the entire length H1 of the honeycomb base material 10, and the open width of the outlet sealed cell 2a at a position formed with the projection part 5 is 65-90% of the open width of the outlet sealed cell 2a at a position not formed with the projection part 5.SELECTED DRAWING: Figure 5 【課題】再生処理の途中で隔壁から剥離した燃焼する前のＰＭが、出口端面において端部が目封止されたセルの当該端部付近に過剰に堆積することがなく、当該端部付近の急激な温度上昇による破損や溶損が生じ難いハニカムフィルタを提供する。【解決手段】入口端面１１から出口端面１２に向かって、ハニカム基材１０の全長Ｈ１の３０％の長さＨ２となる位置Ｐ１と、ハニカム基材１０の全長Ｈ１の８０％の長さＨ３となる位置Ｐ２との間の領域Ｒ１において、少なくとも一部の出口目封止セル２ａに、出口目封止セル２ａを区画形成する隔壁１から出口目封止セル２ａ内に突出する突起部５が形成されており、突起部５が形成された位置における出口目封止セル２ａの開口幅が、突起部５が形成されていない位置における出口目封止セル２ａの開口幅の６５〜９０％であるハニカムフィルタ。【選択図】図５