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 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 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 the plies comprise yarns selected from the group consisting of continuous filaments, staple spun yarns and stretch-broken yarns 
     
     
         2 . The cord of  claim 1 , wherein the component plies are polymeric or metallic. 
     
     
         3 . 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. 
     
     
         4 . The cord of  claim 1 , wherein at least one of the plies has a length that is from 1 to 25 percent longer than the other plies. 
     
     
         5 . The cord or  claim 2 , wherein the polymeric plies are selected from the group consisting of m-aramid, p-aramid, polyazole, nylon, polyester, polyethylenenaphthalate, rayon, UHMW-PE and carbon. 
     
     
         6 . The cord of  claim 5 , wherein the polyazole is polyoxadiazole. 
     
     
         7 . The cord of  claim 5 , comprising at least one p-aramid ply and at least one nylon ply. 
     
     
         8 . The cord of  claim 5 , comprising at least one p-aramid ply and at least one m-aramid ply. 
     
     
         9 . The cord of  claim 7 , wherein the shortest length ply is nylon. 
     
     
         10 . The cord of  claim 8 , wherein the shorter length ply is m-aramid. 
     
     
         11 . The cord of  claim 8 , wherein the p-aramid ply is from 4 to 5 percent longer than the m-aramid ply. 
     
     
         12 . A method of providing a hybrid cord with predetermined twist and component ply lengths comprising the steps of.
 (i) identifying the desired cord twist multiplier and component ply lengths,   (ii) identifying the number of component plies and the composition of each ply,   (iii) providing a cabling machine,   (iv) setting the desired twist level for the hybrid cord into the cabling machine,   (v) setting the desired tension level for the component piles,   (vi) feeding the plies into the cabling machine, and   (vii) producing a cabled cord having the desired twist multiplier and component ply lengths.   
     
     
         13 . The method of  claim 12 , wherein the component plies have zero twist. 
     
     
         14 . The method of  claim 12 , wherein the component plies all have the same twist. 
     
     
         15 . The method of  claim 12 , wherein at least two of the component plies have a different twist. 
     
     
         16 . A product made by the method of  claim 12 , wherein the component plies have zero twist. 
     
     
         17 . A product made by the method of  claim 12 , wherein the component plies all have the same twist. 
     
     
         18 . A product made by the method of  claim 12 , wherein at least two of the component plies have a different twist. 
     
     
         20 . An elastomeric reinforced hose, comprising the hybrid cord of  claim 1 .