Holding sealer and exhaust gas processing device

Abstract

There is provided a holding sealer comprising a mat base member including inorganic fibers and a protective sheet provided on a surface of the mat base member, in which the holding sealer is formed as a rectangular shape, wherein the protective sheet is extended in a different direction inside the surface of the protective sheet, and the protective sheet is placed on the surface of the mat base member such that a direction showing the maximum extension of the protective sheet is arranged at an angle except zero to a long length direction of the holding sealer.

1 . A holding sealer comprising a mat base member including inorganic fibers and a protective sheet provided on a surface of the mat base member, in which the holding sealer is formed as a rectangular shape,
 wherein the protective sheet is extended in a different direction inside the surface of the protective sheet, and   the protective sheet is placed on the surface of the mat base member such that a direction showing the maximum extension of the protective sheet is arranged at an angle except zero to a long length direction of the holding sealer.   
   
   
       2 . The holding sealer as claimed in  claim 1 ,
 wherein the protective sheet is provided on the surface of the mat base member such that the direction showing the maximum extension of the protective sheet is substantially perpendicular to the long length direction of the holding sealer.   
   
   
       3 . The holding sealer as claimed in claim
 wherein the protective sheet is made by polypropylene.   
   
   
       4 . The holding sealer as claimed in  claim 1 ,
 wherein the mat base member includes an inorganic binder and/or an organic binder.   
   
   
       5 . An exhaust gas processing device comprising:
 an exhaust gas processing body;   a holding sealer comprising a mat base member including inorganic fibers and a protective sheet provided on a surface of the mat base member, in which the holding sealer is used such that the holding sealer is wound around the at least part of an outer circumference surface of the exhaust gas processing body so as to face the protective sheet outside,   wherein the protective sheet is extended in different a direction inside the surface of the protective sheet, and   the protective sheet is placed on the surface of the mat base member such that a direction showing the maximum extension of the protective sheet is arranged at an angle except zero to a long length direction of the holding sealer; and   a casing housing the exhaust gas processing body and the holding sealer therein.   
   
   
       6 . The exhaust gas processing device as claimed in  claim 5 ,
 wherein the exhaust gas processing body is a catalyst carrier or an exhaust gas filter.