Rubber reinforcing cord, method of producing the cord, and rubber product using the cord

Abstract

A method of the present invention that is used for manufacturing a reinforcing cord for rubber reinforcement includes: (i) forming second strands each of which is formed by twisting a plurality of first strands together in a first direction, with the first strands including glass filaments as reinforcing fibers; (ii) forming a cord including a plurality of second strands and a treatment agent that has been applied to the second strands, with the plurality of second strands having been twisted together in the same direction as the first direction; and (iii) bonding the second strands to each other by solidifying the treatment agent, with a tensile load of 40 to 800 N per 1 mm 2 of the sectional area of the glass filaments being applied to the cord.

1 . A method of manufacturing a reinforcing cord for rubber reinforcement, the method comprising: 
 (i) forming second strands, each of which is formed by twisting a plurality of first strands together in a first direction, the plurality of first strands including glass filaments as reinforcing fibers;    (ii) forming a cord including a plurality of said second strands and a treatment agent that has been applied to the second strands, the plurality of said second strands having been twisted together in the same direction as the first direction; and    (iii) bonding the second strands to each other by solidifying the treatment agent, with a tensile load of 40 to 800 N per 1 mm 2  of a sectional area of the glass filaments being applied to the cord.    
   
   
       2 . The manufacturing method according to  claim 1 , wherein the cord is formed by applying the treatment agent after the plurality of said second strands are twisted together in the same direction as the first direction.  
   
   
       3 . The manufacturing method according to  claim 1 , wherein the treatment agent has a solid-content weight in a range of 1.0% to 15.0% of the total of a weight of the second strands and the solid-content weight of the treatment agent.  
   
   
       4 . The manufacturing method according to  claim 1 , further comprising coating the glass filaments of the first strands with a pretreatment agent, 
 wherein the pretreatment agent has a solid-content weight in a range of 5.0% to 35.0% of the total of a weight of the glass filaments and the solid-content weight of the pretreatment agent.    
   
   
       5 . The manufacturing method according to  claim 1 , wherein the plurality of first strands are twisted together at a rate of 0.5 to 9.0 times/25 mm and the plurality of said second strands are twisted together at a rate of 0.5 to 9.0 times/25 mm.  
   
   
       6 . A reinforcing cord for rubber reinforcement manufactured by a manufacturing method according to  claim 1 .  
   
   
       7 . A rubber product reinforced with a reinforcing cord for rubber reinforcement according to  claim 6 .  
   
   
       8 . The rubber product according to  claim 7 , which is a rubber belt.  
   
   
       9 . The rubber product according to  claim 7 , which is a rubber tire.