EXHAUST GAS PURIFYING DEVICE WITH SLIP LAYER

摘要

PURPOSE:To prevent a honeycomb catalyst from its destructive failure while maintaining a sealing characteristic of a seal mat, by housing the ceramic made honeycomb catalyst in a metallic case through the seal mat which has at least on its one side a slip layer and is formed by a heat resisting fiber. CONSTITUTION:A ceramic made honeycomb catalyst 1 is contained in a case 3 made of stainless steel through a cushion 2 consisting of a wire net. Here a clearance between the case 3 and the honeycomb catalyst 1 is charged with a seal mat 4 having a slip layer 4a. And the seal mat 4 is arranged so that its slip layer 4a is placed in a side of the honeycomb catalyst 1. While the seal mat 4 contains a heat expanding agent. In this way, the ceramic made honeycomb catalyst 1 can be prevented from its destructive failure while maintaining an excellent sealing characteristic of the seal mat 4 consisting of a heat resisting fiber.