Twisted yarn, opened yarn, carbon fiber-covered twisted yarn, and method for manufacturing these

Abstract

The present invention relates to twisted yarn obtained by twisting a plurality of carbon fiber resins which are slit from a carbon fiber resin tape in which adhesive, alumina sol, and potassium persulfate permeate between a plurality of the carbon fibers spread flatly. An open yarn is obtained by S-twisting and Z-twisting covering yarn around the periphery of the twisted yarn. A carbon fiber covered twisted yarn is obtained by winding the twisted yarn around the periphery of a core material

1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . An open yarn obtained by winding two covering yarns around the periphery of the twisted yarn,
 wherein said twisted is obtained by twisting a plurality of carbon fiber resins which are slit from a carbon fiber resin tape in which adhesive, alumina sol, and potassium persulfate or benzoyl, permeate between a plurality of the carbon spread flatly, wherein one covering yarn is wrapped in an S-direction, and the other one is wrapped in a Z-direction.   
     
     
         4 . The open yarn according to  claim 3 , wherein a low-melting thermoplastic resin is covered over an outer peripheral surface of the covering yarns. 
     
     
         5 . The open yarn according to  claim 3  wherein the covering yarns are selected from one or more of nylon fiber, polytetrafluoroethylene, aramid fiber, or stainless steel material. 
     
     
         6 . The open yarn according to  claim 3 , wherein the diameter of the open yarn is 0.15-2.5 mm. 
     
     
         7 - 12 . (canceled) 
     
     
         13 . A method for manufacturing open yarn described in  claim 3 , the method comprising;
 a 1st step of immersing a carbon fiber bundle having a plurality of carbon fibers into reduced water having a negative oxidation-reduction potential to spread the carbon fiber bundle flat;   a 2nd step of immersing the carbon fiber bundle into either adhesive solution containing adhesive, alumina sol, and potassium persulfate or adhesive solution containing adhesive, alumina sol, and benzoyl after the 1st step;   a 3rd step of drying the carbon fiber bundle to manufacture a carbon fiber resin tape after the 2nd step;   a 4th step of slitting the carbon fiber resin tape and twisting a plurality of the slit carbon fiber resins at 15-80 times/m to form twisted yarn; and   a 5th step of winding two covering yarns around the periphery of the twisted yarn.   
     
     
         14 . The method for manufacturing the open yarn according to  claim 13 , further comprising a step of covering a low-melting thermoplastic resin over the outer peripheral surface of a layer defined by the two covering yarns, after the 5th step. 
     
     
         15 . The method for manufacturing open yarn according to  claim 14 , wherein the step of covering is performed by extruding the low-melting thermoplastic resin in a molten state together with the open yarn from a nozzle while contacting the resin with the outer peripheral surface. 
     
     
         16 . The method for manufacturing open yarn according to  claim 13 , wherein the 5th step further comprises winding the covering yarn around the periphery of the twisted yarn at 4-6 mm-wide equal intervals. 
     
     
         17 - 20 . (canceled) 
     
     
         21 . The open yarn according to  claim 4 , wherein the covering yarns are selected from one or more of nylon fiber, polytetrafluoroethylene, aramid fiber, stainless steel material, or an alloy comprising primarily nickel and contains other components being selected from a group consisting of chromium, iron, and carbon. 
     
     
         22 . The open yarn according to  claim 4 , wherein the diameter of the open yarn is 0.15-2.5 mm. 
     
     
         23 . The open yarn according to  claim 5 , wherein the diameter of the open yarn is 0.15-2.5 mm. 
     
     
         24 . The open yarn according to  claim 21 , wherein the diameter of the open yarn is 0.15-2.5 mm.