Pollution control element-mounting member and pollution control device

Abstract

A pollution control element-mounting member suitable for mounting a pollution control element within a casing of a pollution control device. The pollution control element-mounting member comprises a mat of a fiber material having a predetermined thickness, with the mat having a combination of at least two types of binders having different glass transition temperatures (Tg) impregnated therein.

1 - 13 . (canceled) 
   
   
       14 . A pollution control element-mounting member suitable for mounting a pollution control element within a casing of a pollution control device, said pollution control element-mounting member comprising:
 a mat comprising a fiber material having a predetermined thickness; and   a combination of at least two types of binders having different glass transition temperatures (Tg),   wherein said at least two types of binders are dispersed in the thickness direction of said mat.   
   
   
       15 . The pollution control element-mounting member according to  claim 14 , wherein said at least two types of binders are each an acrylic latex. 
   
   
       16 . The pollution control element-mounting member according to  claim 14 , wherein said binders are a combination of a first acrylic latex having a Tg in the range of from 15 to 45° C. and a second acrylic latex having a Tg in the range of from - 31  45 to 15° C. 
   
   
       17 . The pollution control element-mounting member according to  claim 15 , wherein the total content of said acrylic latex binders in said member is in the range of from 0.1 to 5% by weight. 
   
   
       18 . the pollution control element-mounting member according to claim  6 , wherein the total content of said acrylic latex binders in said member is in the range of from 0.1 to 5% by weight. 
   
   
       19 . The pollution control element-mounting member according to  claim 14 , wherein said fiber material includes an inorganic further material comprising alumina containing fibers. 
   
   
       20 . The pollution control element-mounting member according to  claim 19 , wherein said inorganic fiber material further comprises silica fibers and/or glass fibers in combination with said alumina containing fibers. 
   
   
       21 . The pollution control element-mounting member according to  claim 14 , wherein said mat is formed by a dry process. 
   
   
       22 . The pollution control element-mounting member according to  claim 14 , wherein said at least two types of binders are substantially uniformly dispersed in the thickness direction of said mat. 
   
   
       23 . The pollution control element-mounting member according to  claim 17 , wherein said at least two types of binders are substantially uniformly dispersed in the thickness direction of said mat. 
   
   
       24 . The pollution control element-mounting member according to  claim 18 , wherein said at least two types of binders are substantially uniformly dispensed in the thickness direction of said mat. 
   
   
       25 . Te pollution control element-mounting member according to  claim 14 , wherein said at least two types of binders are uniformly dispersed in a whole portion of said mat. 
   
   
       26 . The pollution control element-mounting member according to  claim 17 , wherein said at least two types of binders are uniformly dispersed in a whole portion of said mat. 
   
   
       27 . The pollution control element-mounting member according to  claim 18 , wherein said at least two types of binders are uniformly dispersed in a whole portion of said mat. 
   
   
       28 . A pollution control device comprising:
 a casing;   a pollution control element provided within said casing; and   a pollution control element-mounting member according to  claim 14 , said pollution control element-mounting member being arranged between said casing and said pollution control element.   
   
   
       29 . The pollution control device according to claim  28, wherein said pollution control element is a catalyst carrier, and said pollution control device is a catalytic converter.    
   
   
       30 . The pollution control device according to  claim 28 , wherein said pollution control element is a filter element, and said pollution control device is an exhaust cleaning device. 
   
   
       31 . The pollution control device according to  claim 28 , wherein said binders are a combination of a first acrylic latex having a Tg in the range of from 15 to 45° C. and a second acrylic latex having a Tg in the range of from −45 to 15° C., and the total content of said acrylic latex binders in said member is in the range of from 0.1 to 5% by weight. 
   
   
       32 . the pollution control device according to  claim 31 . wherein said at least two types of binders are substantially uniformly dispersed in the thickness direction of said mat. 
   
   
       33 . An exhaust system for an internal combustion engine, said exhaust system comprising a pollution control device according to  claim 28 .