Method of vulcanizing an object formed of unvulcanized rubber and rubber product

Abstract

A method of vulcanizing an object formed of unvulcanized rubber, in which the unvulcanized-rubber formed object is vulcanized by pressing and heating by mold means, comprises disposing a fiber sheet member on a surface of the unvulcanized-rubber formed object and vulcanizing the unvulcanized-rubber formed object by the mold means.

1 . A method of vulcanizing an object formed of unvulcanized rubber in which the unvulcanized-rubber formed object is vulcanized by pressing and heating by mold means, comprising; 
 disposing a fiber sheet member on a surface of said unvulcanized-rubber formed object; and    vulcanizing the unvulcanized-rubber formed object by said mold means.    
   
   
       2 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 1 , wherein said fiber sheet member is selected from textile fabric or nonwoven fabric.  
   
   
       3 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 1  or  2 , wherein said fiber sheet member is formed of fiber material having a melting point higher than vulcanizing temperature.  
   
   
       4 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 3 , wherein the fiber material of said fiber sheet member has a melting point equal to 180° C. or higher.  
   
   
       5 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 2 , wherein said fiber sheet member comprises a textile fabric, and the mass per unit area of the fiber sheet member is 5 to 30 g/m 2 .  
   
   
       6 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 5 , wherein the thickness of said fiber sheet member is 0.05 to 0.40 mm.  
   
   
       7 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 2 , wherein said fiber sheet member comprises a nonwoven fabric, and the mass per unit area of the fiber sheet member is 10 to 25 g/m 2 .  
   
   
       8 . A method of vulcanizing an object formed of unvulcanized rubber according to  claim 7 , wherein the thickness of said fiber sheet member is 0.05 to 0.20 mm.  
   
   
       9 . A method of vulcanizing an object formed of unvulcanized rubber according to any one of claims  1 ,  2  and  5  to  8 , wherein said fiber sheet member is disposed on surfaces of the unvulcanized-rubber formed objects end portions of which come into contact with each other.  
   
   
       10 . A method of vulcanizing an object formed of unvulcanized rubber according to any one of claims  1 ,  2  and  5  to  8 , wherein said fiber sheet member is pressed on the surface of said unvulcanized-rubber formed object.  
   
   
       11 . A method of vulcanizing an object formed of unvulcanized rubber according to any one of claims  1 ,  2  and  5  to  8 , wherein said mold means is a vulcanizing belt press having upper and lower heat plates for pressing and heating.  
   
   
       12 . A rubber product comprising a vulcanized-rubber formed object and a fiber sheet member embeded in a surface portion thereof.