Shaped cross-sectional polyethylene yarn and functional fabric including the same

Abstract

The present invention relates to a shaped cross-sectional polyethylene yarn and a functional fabric including the same, and more particularly, to a shaped cross-sectional polyethylene yarn by which a fabric having a cooling sensation and sweat absorption and quick drying properties may be manufactured, and a functional fabric including the same. A polyethylene yarn according to the present invention includes a filament having a central body and two or more protrusions protruding from the central body based on a cross section perpendicular to a longitudinal direction, wherein a degree of crystallinity of the polyethylene yarn is 56 to 85%.

1 . A polyethylene yarn comprising a filament having a central body and two or more protrusions protruding from the central body based on a cross section perpendicular to a longitudinal direction,
 wherein a degree of crystallinity of the polyethylene yarn is 56 to 85%.   
     
     
         2 . The polyethylene yarn of  claim 1 , wherein based on the cross section perpendicular to the longitudinal direction of the polyethylene yarn, a first radius (R1) of an inscribed circle formed by the central body and a second radius (R2) of a circumscribed circle formed by the central body and the protrusion in the central body satisfy the following expression: 
       
         
           
             
               
                 
                   
                     1.2 
                     ≤ 
                     
                       R 
                       ⁢ 
                       2 
                       / 
                       R 
                       ⁢ 
                       1 
                     
                     ≤ 
                     
                       5. 
                       . 
                     
                   
                 
                 
                   
                     [ 
                     Expression 
                     ] 
                   
                 
               
             
           
         
       
     
     
         3 . The polyethylene yarn of  claim 1 , wherein the polyethylene yarn has a melt index (MI, @190° C.) of 1 to 25 g/10 min when measured at 190° C. and 2.16 kg according to ASTM D1238. 
     
     
         4 . The polyethylene yarn of  claim 1 , wherein the polyethylene yarn has a polydispersity index (PDI) of 5 to 30. 
     
     
         5 . The polyethylene yarn of  claim 1 , wherein the polyethylene yarn has a strength of 5 to 15 g/d when measured according to ASTM D2256. 
     
     
         6 . A functional fabric comprising the polyethylene yarn of  claim 1 . 
     
     
         7 . The functional fabric of  claim 6 , wherein the functional fabric has a contact cooling sensation (Q-max) of 0.1 to 0.5 W/cm 2  when measured at 20±2° C. and 65±2% R.H. 
     
     
         8 . The functional fabric of  claim 6 , wherein the functional fabric has a heat flux of 95 to 150 W/m 2  when measured at 20±2° C. and 65±2% R.H. 
     
     
         9 . The functional fabric of  claim 6 , wherein the functional fabric has a moisture absorption rate of 80 to 160 mm/10 min when measured according to a Byreck method that is B Method of KS K 0642 8.26. 
     
     
         10 . The functional fabric of  claim 6 , wherein the functional fabric has a moisture drying rate of 20 to 50 mm/10 min when measured according to A Method of KS K 0642 8.25. 
     
     
         11 . A sweat absorption and quick drying product manufactured using the functional fabric of  claim 6 .