Wound body for exhaust gas system

摘要

An object of the present invention is to provide a method of winding a holding sealing material in order to manufacture an exhaust gas purifying apparatus having a holding sealing material resistant to damage. The method of winding a holding sealing material comprises winding in multiple layers a mat-shaped holding sealing material comprising inorganic fibers around an outer peripheral portion of a pillar-shaped exhaust gas treating body that has a plurality of cells placed longitudinally in parallel with one another with a cell wail interposed therebetween, wherein each layer of the holding sealing material on said exhaust gas treating body is shifted in the winding order such that an outer layer of the holding sealing material is placed closer to one end face of said exhaust gas treating body than an inner layer of the holding sealing material, and that a shift between each inner layer and the adjacent outer layer is 0.15 to 15% of a length in a width direction of said holding sealing material.