Patent ID: 7892309
Filing Date: 2011-02-22
Classification: B01D

Abstract:
1. A method for producing a honeycomb filter from a honeycomb structure having large numbers of flow paths partitioned by cell walls, comprising inserting a tubular member into each of said flow paths, and injecting a plugging material into each of said flow paths from said tubular member to form a plug in each of said flow paths at a position separate from an end surface of said honeycomb structure, said tubular member having an outer diameter that is 40-90% of the opening size of said flow paths, said plugging material comprising at least a ceramic material having a maximum particle size that is 85% or less of the inner diameter of said tubular member, and an average particle size of 1 μm or more, wherein after said plugging material is injected, the end surface of the honeycomb structure, through which said tubular member is inserted, is removed by machining.