Method of manufacturing electro-magnetic wave shielding yarn

Abstract

The present invention relates to a method of manufacturing electromagnetic wave shielding yarn comprising the steps of (1) spinning core yarn with the apparatus for core spun yarn on ring spinning machine, (2) preparing rovings made of natural, synthetic and blended fiber, (3) preparing a twisted wire-filament core, (4) feeding rovings to front rollers through back and middle rollers, (5) supplying said twisted core to the front rollers applying tension on the twisted core by means of drafting the twisted core with suitable draft ratio which is the ratio of surface velocity between core supplying rollers and the front rollers and (6) twisting the delivered core yarn.

What is claimed is:  
     
         1 . A method of manufacturing electromagnetic wave shielding yarn comprising the steps of; 
 (1) spinning core yarn with the apparatus for core spun yarn on ring spinning machine;    (2) preparing roving made of natural, synthetic and blended fiber;    (3) preparing a twisted wire-filament core;    (4) feeding roving to front rollers through back and middle rollers;    (5) supplying said twisted core to the front rollers applying tension on the twisted core by means of drafting the twisted core with suitable draft ratio which is the ratio of surface velocity between core supplying rollers and the front rollers; and    (6) twisting the delivered core yarn.    
     
     
         2 . The method of manufacturing electro-magnetic wave shielding yarn according to  claim 1 , wherein said wire is selected from the group consisting of gold, silver, copper, stainless, iron and carbon wire.  
     
     
         3 . The method of manufacturing electromagnetic wave shielding yarn according to  claim 1 , wherein said filament is synthetic fiber.  
     
     
         4 . The method of manufacturing electro-magnetic wave shielding yarn according to  claim 1 , wherein said twisted wire-filament core is supplied to the front rollers applying tension on the twisted core by means of drafting the twisted core with suitable draft ratio which is the ratio of surface velocity between core supplying rollers and the front rollers.