Reinforcing Sheet for Reinforcing Toothed Belt,and Toothed Belt and Method for Production Thereof

Abstract

A method of manufacturing of the present invention is a method of manufacturing a toothed belt ( 10 ) having a belt part ( 13 ) and a tooth part ( 14 ) sticking out of the belt part ( 13 ). This method of manufacturing includes a first step of forming a reinforcing-sheet ( 12 ) including a fiber sheet and a coating film formed on the fiber sheet by drying the fiber sheet on which an aqueous treatment agent containing a first rubber latex and a first vulcanizing agent is applied, and a second step of reinforcing a surface of the tooth part ( 14 ) with the reinforcing-sheet ( 12 ) by vulcanizing the first rubber and a second rubber at the same time while adhering a rubber composition, which is a material for the tooth part ( 14 ), including the second rubber and a second vulcanizing agent to the reinforcing-sheet ( 12 ). The aqueous treatment agent contains the vulcanizing agent in the range of 10 parts by weight to 100 parts by weight for 100 parts by weight of the first rubber.

1 . A reinforcing-sheet for reinforcing a toothed belt comprising:
 a fiber sheet; and   a coating film formed on the fiber sheet,   wherein the coating film is formed by drying the fiber sheet on which an aqueous treatment agent containing a rubber latex and a vulcanizing agent as its main components is applied,   the aqueous treatment agent contains the vulcanizing agent in the range of 30 parts by weight to 75 parts by weight for 100 parts by weight of the rubber, and   the vulcanizing agent is at least one vulcanizing agent selected from a group consisting of a maleimide vulcanizing agent, organic diisocyanate and an aromatic nitroso-compound.   
     
     
         2 . The reinforcing-sheet according to  claim 1 , wherein the aqueous treatment agent further contains carbon black. 
     
     
         3 . A method of manufacturing a toothed belt having a belt part and a tooth part sticking out of the belt part, comprising:
 a first step of forming a reinforcing-sheet including a fiber sheet and a coating film formed on the fiber sheet by drying the fiber sheet on which an aqueous treatment agent containing a first rubber latex and a first vulcanizing agent is applied; and   a second step of reinforcing a surface of the tooth part with the reinforcing-sheet by vulcanizing the first rubber and a second rubber at the same time while adhering a rubber composition, which is a material for the tooth part, including the second rubber and a second vulcanizing agent to the reinforcing-sheet,   wherein the aqueous treatment agent contains the first vulcanizing agent in the range of 30 parts by weight to 75 parts by weight for 100 parts by weight of the first rubber, and   the first vulcanizing agent is at least one vulcanizing agent selected from a group consisting of a maleimide vulcanizing agent, organic diisocyanate and an aromatic nitroso-compound.   
     
     
         4 . The method of manufacturing a toothed belt according to  claim 3 , wherein the aqueous treatment agent further contains carbon black. 
     
     
         5 . (canceled) 
     
     
         6 . The method of manufacturing a toothed belt according to  claim 3 , wherein the first vulcanizing agent is diphenylmethane-4,4′-bismaleimide. 
     
     
         7 . The method of manufacturing a toothed belt according to  claim 3 , wherein the first rubber is at least one rubber selected from nitrile rubber and hydrogenated nitrile rubber. 
     
     
         8 . The method of manufacturing a toothed belt according to  claim 3 , wherein the first rubber is a carboxylated rubber. 
     
     
         9 . A toothed belt manufactured by the method of manufacturing according to  claim 3 .