Metal carrier

Abstract

A metal carrier includes a core ( 3 ) having a thinned film containing a metal catalyst. The core includes a first metal sheet ( 1 ) corrugated and having a crest with a first radius (R). The core includes a second metal sheet ( 2 ) flattened or corrugated smaller in corrugation height than the first metal sheet, The first and second metal sheets are stacked on each other to be wound up. The crest and second metal sheet are joined to each other, having a joint therebetween. A fillet of the catalyst is formed between the joint, the first metal sheet, and the second metal sheet, having an arced surface of a second radius (r) extending between the first and second metal sheets. The first radius is set substantially equal to the second radius.

1 . A metal carrier comprising 
 a core having a thinned film containing a metal catalyst,    the core comprising: 
 a first metal sheet corrugated and having a crest with a first radius; and  
 a second metal sheet flattened or corrugated smaller in corrugation height than the first metal sheet,  
   wherein the first and second metal sheets are stacked on each other and are wound up,    wherein the crest and second metal sheet are joined to each other, having a joint therebetween,    wherein a fillet of the catalyst is formed between the joint, the first metal sheet, and the second metal sheet, having an arced surface of a second radius extending between the first and second metal sheets,    wherein the first radius is set substantially equal to the second radius.    
   
   
       2 . The metal carrier according to  claim 1 , wherein the first radius is an inner radius of the crest.  
   
   
       3 . The metal carrier according to  claim 2 , wherein the first radius is 1.0 to 1.2 times of the second radius.  
   
   
       4 . The metal carrier comprising: 
 a core having a thinned film containing a metal catalyst,    the core comprising; 
 a first metal sheet corrugated and having a crest with a first radius; and  
 a second metal sheet flattened or corrugated smaller in corrugation height than the first metal sheet,  
   wherein the first and second metal sheets are stacked on each other and are wound up,    wherein the crest and second metal sheet are joined to each other, having a joint therebetween,    wherein a fillet of the catalyst is formed between the joint, the first metal sheet, and the second metal sheet, having an arced surface of a second average radius extending between the first and second metal sheets,    wherein the first radius is set to the second average radius with a standard deviation (σ) or more,    wherein the first metal sheet has a vertical wall set to be substantially normal to the second metal sheet.    
   
   
       5 . The metal carrier according to  claim 4 , wherein the first metal sheet has a corrugation height between a crest and a trough thereof and a corrugation pitch between neighboring crests, 
 wherein the corrugation height is greater than the corrugation patch.