| 摘要 |
PROBLEM TO BE SOLVED: To enable a filter with an exhaust emission control catalyst carried thereon to be produced, the filter exhibiting an almost uniform pressure loss to exhaust gas flowing thereto.SOLUTION: There is provided a method for producing a filter in which an exhaust emission control catalyst is carried on a partition wall for defining a plurality of flow passages each extending to the center axis direction. In the method, a predetermined water repellent having water repellency is filled into a base material of the partition wall along the center axis direction of the filter in such a way that the thickness of a layer of the predetermined water repellent becomes almost constant along the center axis direction of the filter. Then, after the filling step, a coating agent containing the exhaust emission control catalyst is applied to the base material, which is not filled with the predetermined water repellent, of the partition wall. |
