Bulky yarn

Abstract

A bulky yarn includes a sheath yarn having continuously formed loops without any breakages; and a core yarn that substantially fixes the sheath yarn by being interlaced with the sheath yarn, wherein a number of loops protruding from a yarn surface layer by not less than 3.0 mm is 1 to 30 loops/mm, an elastic modulus is not greater than 80 cN/dtex, and an extension recovery rate at a time of 10% extension recovery is not less than 50%.

1 - 12 . (canceled) 
     
     
         13 . A bulky yarn comprising:
 a sheath yarn having continuously formed loops without any breakages; and   a core yarn that substantially fixes the sheath yarn by being interlaced with the sheath yarn,   wherein a number of loops protruding from a yarn surface layer by not less than 3.0 mm is 1 to 30 loops/mm, an elastic modulus is not greater than 80 cN/dtex, and an extension recovery rate at a time of 10% extension recovery is not less than 50%.   
     
     
         14 . The bulky yarn according to  claim 13 , wherein a single yarn fineness of a constituent fiber is not less than 3.0 dtex, and a single yarn fineness ratio of the sheath yarn to the core yarn (sheath/core) is 0.5 to 2.5. 
     
     
         15 . The bulky yarn according to  claim 13 , wherein the core yarn is a side-by-side or eccentric core-in-sheath conjugate fiber, and a fiber that constitutes the sheath yarn is a three-dimensional crimped structure yarn having a curvature radius of 2.0 mm to 30.0 mm. 
     
     
         16 . A bulky yarn comprising:
 a sheath yarn having formed loops; and   a core yarn that substantially fixes the sheath yarn by being interlaced with the sheath yarn,   wherein the sheath yarn has continuously formed loops substantially without any breakages and is a conjugate fiber having a density of less than 1.00 g/cm 3 .   
     
     
         17 . The bulky yarn according to  claim 16 , wherein the sheath yarn has a three-dimensional crimped structure. 
     
     
         18 . The bulky yarn according to  claim 16 , wherein the sheath yarn is an islands-in-sea conjugate fiber having a hollow cross section with a hollow rate of not less than 20%. 
     
     
         19 . The bulky yarn according to  claim 18 , wherein an island component in the islands-in-sea conjugate fiber contains a polyolefin and a sea component in the islands-in-sea conjugate fiber contains a polyester. 
     
     
         20 . A bulky yarn comprising:
 a sheath yarn having formed loops and a three-dimensional crimped structure; and   a core yarn that substantially fixes the sheath yarn by being interlaced with the sheath yarn,   wherein a 10% modulus is less than 1.5 cN/dtex, a fiber extension ratio at load application is not less than 1.1, and a fiber length restoration rate after load application extension is 80 to 100%.   
     
     
         21 . The bulky yarn according to  claim 20 , wherein the fiber extension ratio at load application is not less than 1.5, and the fiber length restoration rate after load application extension is 90 to 100%. 
     
     
         22 . The bulky yarn according to  claim 13 , wherein a coefficient of static friction between fibers is not greater than 0.3. 
     
     
         23 . The bulky yarn according to  claim 13 , wherein both the core yarn and the sheath yarn are composed of hollow cross-section fibers with a hollow rate of not less than 20%. 
     
     
         24 . A fiber product comprising the bulky yarn according to  claim 13  in at least a part of the fiber product. 
     
     
         25 . The bulky yarn according to  claim 14 , wherein the core yarn is a side-by-side or eccentric core-in-sheath conjugate fiber, and a fiber that constitutes the sheath yarn is a three-dimensional crimped structure yarn having a curvature radius of 2.0 mm to 30.0 mm. 
     
     
         26 . The bulky yarn according to  claim 17 , wherein the sheath yarn is an islands-in-sea conjugate fiber having a hollow cross section with a hollow rate of not less than 20%. 
     
     
         27 . The bulky yarn according to  claim 16 , wherein a coefficient of static friction between fibers is not greater than 0.3. 
     
     
         28 . The bulky yarn according to  claim 20 , wherein a coefficient of static friction between fibers is not greater than 0.3. 
     
     
         29 . The bulky yarn according to  claim 16 , wherein both the core yarn and the sheath yarn are composed of hollow cross-section fibers with a hollow rate of not less than 20%. 
     
     
         30 . The bulky yarn according to  claim 20 , wherein both the core yarn and the sheath yarn are composed of hollow cross-section fibers with a hollow rate of not less than 20%. 
     
     
         31 . A fiber product comprising the bulky yarn according to  claim 16  in at least a part of the fiber product. 
     
     
         32 . A fiber product comprising the bulky yarn according to  claim 20  in at least a part of the fiber product.