Covering yarn, twisted yarn, and fiber structure using the same

Abstract

A covering yarn 1, 4 , or 6 includes a metal filament 2 and an organic fiber yarn 3 or 5 . The metal filament 2 is arranged as a core, the organic fiber yarn 3 or 5 is arranged as a sheath, and the entire covering yarn is straight. The metal filament 2 has a wire diameter of no greater than 35 μm, and the covering yarn 1, 4 , or 6 is electrically conductive. Preferably, the metal filament 2 is at least one filament selected from a tungsten filament, a molybdenum filament, and a stainless steel filament. A twisted yarn of the present invention is constituted by a core yarn, a decorative yarn, and a fixing yarn. The decorative yarn has loops or slack. At least one yarn selected from the core yarn, the decorative yarn, and the fixing yarn is the above-described covering yarn. The entire twisted yarn has real twists. Thus provided are a covering yarn and a twisted yarn that are constituted by fiber yarns that are as soft as ordinary fiber yarns for clothing, have favorable conductivity and ventilation properties, and can be washed at home, and a fiber structure obtained using the covering yarn or the twisted yarn.

1 . A covering yarn comprising a metal filament and an organic fiber yarn,
 wherein the metal filament is arranged as a core, the organic fiber yarn is arranged as a sheath, and the entire covering yarn is straight,   the metal filament has a wire diameter of no greater than 35 μm, and   the covering yarn is electrically conductive.   
     
     
         2 . The covering yarn according to  claim 1 ,
 wherein the metal filament is a monofilament having a wire diameter of no greater than 22 μm.   
     
     
         3 . The covering yarn according to  claim 1 ,
 wherein the metal filament is at least one filament selected from a tungsten filament, a molybdenum filament, and a stainless steel filament.   
     
     
         4 . The covering yarn according to  claim 1 ,
 wherein the covering yarn is a single covering yarn or a double covering yarn.   
     
     
         5 . The covering yarn according to  claim 1 ,
 wherein an organic fiber yarn is further arranged as a plating yarn along the core yarn.   
     
     
         6 . The covering yarn according to  claim 5 ,
 wherein the organic fiber yarn serving as the plating yarn is a water-soluble fiber yarn.   
     
     
         7 . A twisted yarn comprising at least two yarns that are twisted together,
 wherein at least one yarn constituting the twisted yarn is a covering yarn and another yarn is an organic fiber yarn,   the covering yarn includes a metal filament and an organic fiber yarn,
 the metal filament is arranged as a core, the organic fiber yarn is arranged as a sheath, and the entire covering yarn is straight, 
   the metal filament has a wire diameter of no greater than 35 μm, and   the covering yarn is electrically conductive.   
     
     
         8 . A twisted yarn constituted by a core yarn, a decorative yarn, and a fixing yarn,
 wherein the decorative yarn is a twisted yarn that has loops or slack,   at least one yarn selected from the core yarn, the decorative yarn, and the fixing yarn is a covering yarn that includes a metal filament and an organic fiber yarn,   the metal filament is arranged as a core, the organic fiber yarn is arranged as a sheath, and the entire covering yarn is straight,   the metal filament has a wire diameter of no greater than 35 μm,   the covering yarn is electrically conductive, and   the entire twisted yarn has real twists.   
     
     
         9 . The twisted yarn according to  claim 8 , constituted by one strand of the core yarn, a plurality of strands of the decorative yarn, and one strand of the fixing yarn. 
     
     
         10 . A twisted yarn comprising a covering yarn that includes a metal filament and an organic fiber yarn,
 wherein the metal filament is arranged as a core, the organic fiber yarn is arranged as a sheath, and the entire covering yarn is straight,   the covering yarn is electrically conductive,   the organic fiber yarn is a fiber yarn of at least one fiber selected from synthetic fibers, natural fibers, and regenerated fibers,   the metal filament has a wire diameter of no greater than 35 μm, and   the twisted yarn is electrically conductive.   
     
     
         11 . The twisted yarn according to  claim 10 ,
 wherein the metal filament is exposed at a surface of the twisted yarn.   
     
     
         12 . A fiber structure that is at least one fiber structure selected from a woven fabric, a knit, a braided material, and a machine-sewing yarn, the fiber structure comprising
 a twisted yarn that includes at least two yarns twisted together,   wherein at least one yarn constituting the twisted yarn is a covering yarn and another yarn is an organic fiber yarn,   the covering yarn includes a metal filament and an organic fiber yarn,   the metal filament is arranged as a core, the organic fiber yarn is arranged as a sheath, the metal filament has a wire diameter of no greater than 35 μm, and   
       the covering yarn is electrically conductive. 
     
     
         13 . The fiber structure according to  claim 12 ,
 wherein the organic fiber yarn is removed from the fiber structure, and the fiber structure is a metal fiber layer that is constituted only by the metal filament.   
     
     
         14 . The fiber structure according to  claim 12 ,
 wherein the fiber structure is a layered structure that is constituted by a metal fiber layer and a layer of a flame-retardant fiber that has an oxygen index (OI) of at least 26 as measured in accordance with JIS K 7201-2.   
     
     
         15 . The fiber structure according to  claim 14 ,
 wherein the flame-retardant fiber is at least one fiber selected from para-aramid fibers, meta-aramid fibers, polyarylate fibers, polybenzoxazole fibers, and flame-retardant acrylic fibers.   
     
     
         16 . A fiber structure that is at least one fiber structure selected from a woven fabric, a knit, a braided material, and a machine-sewing yarn, the fiber structure comprising
 a twisted yarn that includes at least two yarns twisted together,   wherein at least one yarn constituting the twisted yarn is a twisted yarn constituted by a core yarn, a decorative yarn, and a fixing yarn, and another yarn is an organic fiber yarn,   the decorative yarn is a twisted yarn that has loops or slack,   at least one yarn selected from the core yarn, the decorative yarn, and the fixing yarn is a covering yarn that includes a metal filament and an organic fiber yarn,   the metal filament is arranged as a core, and the organic fiber yarn is arranged as a sheath,   the metal filament has a wire diameter of no greater than 35 μm, and   the covering yarn is electrically conductive.   
     
     
         17 . The fiber structure according to  claim 16 , comprising one strand of the core yarn, a plurality of strands of the decorative yarn, and one strand of the fixing yarn.