Sparkling dyed double covered yarn and method for producing the same

Abstract

The present invention provides a sparkling dyed double covered yarn comprising: (i) a core yarn; (ii) a first sheath yarn made of a bright polyamide yarn wound around the core yarn to form a single covered yarn; and (iii) a second sheath yarn made of a dyed polyamide yarn wound around said single covered yarn to form a double covered yarn; wherein the first sheath yarn and the second sheath yarn are wound in the same direction. The invention further provides processes for manufacturing a sparkling dyed double covered yarn and fabrics comprising the same.

1 . A sparkling dyed double covered yarn comprising:
 (i) a core yarn;   (ii) a first sheath yarn made of a bright polyamide yarn wound around the core yarn to form a single covered yarn; and   (iii) a second sheath yarn made of a dyed polyamide yarn wound around said single covered yarn to form a double covered yarn;   wherein the first sheath yarn and the second sheath yarn are wound in the same direction.   
     
     
         2 . The sparkling dyed double covered yarn of  claim 1 , wherein the core yarn is an elastomeric yarn. 
     
     
         3 . The sparkling dyed double covered yarn of  claim 2 , wherein the elastomeric yarn is a spandex yarn. 
     
     
         4 . The sparkling dyed double covered yarn of  claim 1 , wherein the bright polyamide yarn is a bright flat fully drawn polyamide yarn (FDY). 
     
     
         5 . The sparkling dyed double covered yarn of  claim 1 , wherein the bright polyamide yarn is a bright partially oriented polyamide yarn (POY) or a bright textured polyamide yarn. 
     
     
         6 . The sparkling dyed double covered yarn of  claim 1 , wherein the dyed polyamide yarn is a dyed textured polyamide yarn, a dyed flat polyamide yarn, or a dyed POY yarn. 
     
     
         7 . The sparkling dyed double covered yarn of  claim 1 , wherein the number of turns per meter of the bright polyamide yarn is between 300 and 1800 turns per meter. 
     
     
         8 . The sparkling dyed double covered yarn of  claim 1 , wherein the number of turns per meter of the dyed polyamide yarn is between 300 and 1800 turns per meter. 
     
     
         9 . A sparkling dyed double covered yarn comprising:
 (i) an elastomeric core yarn;   (ii) a first sheath yarn made of a bright flat fully drawn polyamide yarn wound around the core yarn to form a single covered yarn; and   (iii) a second sheath yarn made of a dyed textured polyamide yarn wound around said single covered yarn to form a double covered yarn;   wherein the first sheath yarn and the second sheath yarn are wound in the same direction.   
     
     
         10 . A process for manufacturing a sparkling dyed double covered yarn comprising the steps of:
 (i) providing a core yarn;   (ii) winding a first sheath yarn made of a bright polyamide yarn around said core yarn to form a single covered yarn; and   (iii) winding a second sheath yarn made of a dyed polyamide yarn around said single covered yarn to form a double covered yarn;   wherein the first and the second sheath yarn are wound in the same direction.   
     
     
         11 . The process of  claim 10 , wherein the core yarn is an elastomeric yarn. 
     
     
         12 . The process of  claim 11 , wherein the elastomeric yarn is a spandex yarn. 
     
     
         13 . The process of  claim 10 , wherein the bright polyamide yarn is a bright flat fully drawn polyamide yarn (FDY). 
     
     
         14 . The process of  claim 10 , wherein the bright polyamide yarn is a bright partially oriented polyamide yarn (POY) or a bright textured polyamide yarn. 
     
     
         15 . The process of  claim 10 , wherein the dyed polyamide yarn is a dyed textured polyamide yarn, a dyed flat polyamide yarn, or a dyed POY yarn. 
     
     
         16 . The process of  claim 10 , wherein the winding speed of the first sheath yarn is between 300 and 1800 turns per meter. 
     
     
         17 . The process of  claim 10 , wherein the winding speed of the second sheath yarn is between 300 and 1800 turns per meter. 
     
     
         18 . A fabric comprising a sparkling dyed double covered yarn according to  claim 1 .