Unbalanced Hybrid Cords and Methods for Making on Cable Cording Machines

Abstract

A hybrid cord formed from a plurality of component plies wherein at least two of the plies are of unequal ply length regardless of the twist of the plies and at least one of the plies has a length that is from 1 to 50 percent longer than the other plies and a method of providing a cord with predetermined twist and component ply lengths.

1 . A hybrid cord, comprising a plurality of polymeric or metallic plies, wherein at least two of the plies are of unequal ply length regardless of the twist of the plies and at least one of the plies has a length that is from 1 to 50 percent longer than the other plies,
 wherein   (i) the at least one longer ply has a higher modulus than the other plies, and   (ii) the hybrid cord has a linear density of from 500-5000 denier.   
     
     
         2 . The cord of  claim 1 , wherein at least one of the plies has a length that is from 1 to 35 percent longer than the other plies. 
     
     
         3 . The cord of  claim 1 , wherein, the component plies have zero twist. 
     
     
         4 . The cord of  claim 1 , wherein, the component plies all have the same twist. 
     
     
         5 . The cord of  claim 1 , wherein, at least two of the component plies have a different twist. 
     
     
         6 . The cord of  claim 1 , wherein the polymeric plies are m-aramid, p-aramid, nylon, polyester, polyethylenenaphthalate, rayon, UHMW-PE or carbon. 
     
     
         7 . The cord of  claim 2 , wherein at least one of the plies has a length that is from 1 to 25 percent longer than the other plies. 
     
     
         8 . The cord of  claim 6 , comprising at least one p-aramid ply and at least one nylon ply, the at least one nylon ply being of shorter length than the at least one p-aramid ply. 
     
     
         9 . The cord of  claim 6 , comprising at least one p-aramid ply and at least one m-aramid ply, the at least one m-aramid ply being of shorter length than the at least one p-aramid ply. 
     
     
         10 . The cord of  claim 9 , wherein the at least one p-aramid ply is from 4 to 5 percent longer than the at least one m-aramid ply. 
     
     
         11 . An elastomeric reinforced hose, belt or tire comprising a cord of  claim 1 . 
     
     
         12 . A woven or knit fabric comprising a cord of  claim 1 .