Composite yarn

Abstract

A composite matrix yarn (Y) including a cover yarn ( 80 ) formed of a plurality of twisted fibers, a core strand ( 70 ) positioned within the cover yarn ( 80 ) and around which the fibers of the cover yarn ( 80 ) are twisted to provide mechanical adhesion between the cover yarn ( 80 ) and the core strand ( 70 ), and an adhesive binder ( 75 ) carried on the core strand ( 70 ) for providing enhanced adhesion between the core strand ( 70 ) and the cover yarn ( 80 ).

I claim:  
     
         1 . A composite matrix yarn, comprising: 
 (a) a cover yarn formed of a plurality of twisted fibers;    (b) a core strand positioned within the cover yarn and around which the fibers of the cover yarn are twisted to provide mechanical adhesion between the cover yarn and the core strand; and    (c) an adhesive binder carried on the core strand for providing enhanced adhesion between the core strand and the cover yarn.    
     
     
         2 . A composite matrix yarn according to  claim 1 , wherein the core strand is chosen from the group consisting of wire, spun yarn, monofilament yarn and multifilament yarn.  
     
     
         3 . A composite matrix yarn according to  claim 1 , wherein the cover yarn comprises staple fibers chosen from the group consisting of natural fibers and synthetic fibers.  
     
     
         4 . A composite matrix yarn according to  claim 1 , wherein the adhesive binder is chosen from the group consisting of isocyanate, natural rubber latex, butadiene rubber latex, vinylpyridene, styrene butadiene rubber, terpolymer rubber latex, sbr copolymer rubber latex, chloroprene rubber latex, acrylonitrile butadiene copolymer rubber latex, rfl resorcinol formaldehyde latex, hot melt adhesive, pvc polyvinyl chloride, urethane, natural glue, synthetic glue, natural wax and synthetic waxes.  
     
     
         5 . A method of constructing a composite matrix yarn, comprising the steps of: 
 (a) forming a sliver of staple fibers;    (b) drafting the sliver into a yarn;    (c) introducing into the drafted sliver a core strand to form a composite yarn, said core strand having thereon an adhesive binder for providing enhanced adhesion between the core strand and the cover yarn; and    (d) twisting the composite yarn to impart mechanical adhesion thereto.    
     
     
         6 . A method according to  claim 5 , wherein the step of drafting the sliver comprises the step of drafting the sliver on an open-end spinning machine to form the sliver into a yarn.  
     
     
         7 . A method according to  claim 5 , and including the step of plying the composite yarn.  
     
     
         8 . A method according to  claim 6 , wherein the step of introducing the core strand into the drafted sliver comprises introducing a strand chosen from the group consisting of wire, fiberglass, aramid, polyethylene, polyester, rayon, polypropylene, polyolefin and nylon.  
     
     
         9 . A method according to  claim 6 , wherein the adhesive binder is chosen from the group consisting of isocyanate, natural rubber latex, butadiene rubber latex, vinylpyridene, styrene butadiene rubber, terpolymer rubber latex, sbr copolymer rubber latex, chloroprene rubber latex, acrylonitrile butadiene copolymer rubber latex, rfl resorcinol formaldehyde latex, hot melt adhesive, pvc polyvinyl chloride, urethane, natural glue, synthetic glue, natural wax and synthetic wax.