Cord, method of producing same, and rubber-cord composite body

Abstract

A cord obtained by twisting a plurality of strands each composed of a plurality of filaments is provided. A circumferential surface of the filament is coated with unvulcanized rubber to improve rubber intrusion, thereby improving corrosion resistance and suppressing twisting-loss.

1 . A cord including a plurality of strands that are twisted together, each strand having a core composed of a filament or a plurality of filaments that are twisted together, and at least one layer of sheaths arranged around the core, each sheath being composed of a plurality of filaments that are twisted together, wherein at least a circumferential surface of the core of the strand is coated with unvulcanized rubber. 
   
   
       2 . The cord according to  claim 1 , wherein the strand is produced by wrapping a plurality of filaments in an identical direction at an identical pitch. 
   
   
       3 . The cord according to  claim 1 , wherein the cord is obtained by wrapping a plurality of sheath strands composed of a plurality of filaments around a core strand composed of a plurality of filaments. 
   
   
       4 . The cord according to  claim 3 , wherein a circumferential surface of the core strand is coated with unvulcanized rubber. 
   
   
       5 . The cord according to  claim 3 , wherein the cord has six sheath strands around one core strand. 
   
   
       6 . A rubber-cord composite body, wherein a plurality of the cord according to  claim 1  are arranged in parallel with each other and coated with rubber. 
   
   
       7 . A method of producing a cord including a plurality of strands that are twisted together, each strand having a core composed of a filament or a plurality of filaments that are twisted together, and at least one layer of sheaths around the core composed of a plurality of filaments that are twisted together, wherein at least a circumferential surface of the core of the strand is coated with unvulcanized rubber prior to form the cord. 
   
   
       8 . The method according to  claim 7 , wherein a plurality of sheath strands are twisted around a core strand, and a circumferential surface of the core strand is coated with unvulcanized rubber.