Warp knitted fabric and method of manufacturing the same

Abstract

A warp knitted fabric includes a non-elastic filament yarns threaded from a first guide bar and knitted in a 1×2 open Koper stitch pattern, and an elastic yarns threaded from a second guide bar and knitted in a 1×1 closed pillar stitch pattern. The elasticity of the knitted fabric composed of the elastic and non-elastic filament yarns are substantially the same in both longitudinal and transverse directions. A method of manufacturing the warp knitted fabric is also disclosed.

1 . A warp knitted fabric comprising:
 (a) non-elastic yarns threaded from a first guide bar at a front side of a knitting machine and knitted in a 1×2 open Koper stitch pattern; and   (b) elastic yarns threaded from a second guide bar at a rear side of the knitting machine and knitted in a 1×1 closed pillar stitch pattern;   (c) wherein the stretch ratio and elastic modulus under specified drawing forces of the knitted fabric composed of the elastic and non-elastic yarns are substantially the same in both longitudinal and transverse directions.   
     
     
         2 . The fabric as claimed in  claim 1 , wherein the threading of the non-elastic yarns is full threading. 
     
     
         3 . The fabric as claimed in  claim 1 , wherein the threading of the elastic yarns is full threading. 
     
     
         4 . The fabric as claimed in  claim 1 , wherein the ratio of stitch density of the knitted fabric in the warp to the weft directions is 2:1 (±15%). 
     
     
         5 . The fabric as claimed in  claim 1 , wherein the non-elastic yarns are nylon yarns. 
     
     
         6 . The fabric as claimed in  claim 1 , wherein the non-elastic yarns are polyester yarns. 
     
     
         7 . The fabric as claimed in  claim 1 , wherein the elastic yarns are spandex yarns. 
     
     
         8 . A method of manufacturing warp knitted fabrics comprising the steps of:
 (a) knitting non-elastic yarns threaded from at least one guide bar at a front side of a knitting machine in a 1×2 open Koper stitch pattern; and   (b) knitting elastic yarns threaded from at least one guide bar at a rear side of the knitting machine in a 1×1 closed pillar stitch pattern;   (c) wherein the stretch ratio and elastic modulus under specified drawing forces of the knitted fabric composed of the elastic and non-elastic yarns are substantially the same in both longitudinal and transverse directions.   
     
     
         9 . The method as claimed in  claim 8 , wherein the knitting of the elastic and non-elastic yarns is carried out by a Raschel warp knitting machine. 
     
     
         10 . The method as claimed in  claim 8 , wherein the knitting of the elastic and non-elastic yarns is carried out by a Tricot warp knitting machine. 
     
     
         11 . The method as claimed in  claim 8 , wherein the aggregate threading of the at least one guide bar at the front side of the knitting machine is full threading. 
     
     
         12 . The method as claimed in  claim 8 , wherein the aggregate threading of the at least one guide bar at the rear side of the knitting machine is full threading. 
     
     
         13 . The method as claimed in  claim 8 , wherein the ratio of stitch density of the knitted fabric in the warp to the weft directions is 2:1 (±15%). 
     
     
         14 . The method as claimed in  claim 8 , wherein the non-elastic yarns are nylon yarns. 
     
     
         15 . The method as claimed in  claim 8 , wherein the non-elastic yarns are polyester yarns. 
     
     
         16 . The method as claimed in  claim 8 , wherein the elastic yarns are spandex yarns. 
     
     
         17 . An article of clothing made of the warp knitted fabric as claimed in  claim 1 .