Spun yarn and woven or knitted fabric

Abstract

A spun yarn includes 20 to 80% by mass of a polyester-based fiber having a flat multifoliar cross section and 20 to 80% by mass of a cellulose-based fiber. A cross-sectional shape of the polyester-based fiber having a flat multifoliar cross section is a flat shape having 6 or more convex parts on a circumference thereof. The polyester-based fiber having a flat multifoliar cross section has the specific flat ratio and specific modified shape ratio.

1 .- 6 . (canceled) 
     
     
         7 . A spun yarn comprising 20 to 80% by mass of a polyester-based fiber having a flat multifoliar cross section and 20 to 80% by mass of a cellulose-based fiber, wherein a cross-sectional shape of the polyester-based fiber having a flat multifoliar cross section is a flat shape having 6 or more convex parts on a circumference thereof, and when a maximum length of a cross section of the polyester-based fiber having a flat multifoliar cross section is taken as A, a maximum width of the cross section of the polyester-based fiber having a flat multifoliar cross section is taken as B, a length of a line connecting vertexes of convex parts adjacent to each other in a maximum concave-convex part is taken as C, and a length of a perpendicular line drawn from the line connecting the vertexes of the convex parts adjacent to each other in the maximum concave-convex part to a bottom point of a concave part is taken as D, a flat ratio defined by formula (1) and a modified shape ratio defined by formula (2) are satisfied:
   Flat ratio( A/B )=2.0 to 3.0   (1)
     Modified shape ratio( C/D )=1.0 to 5.0   (2).
   
     
     
         8 . The spun yarn according to  claim 7 , wherein the modified shape ratio is 2.0 to 5.0. 
     
     
         9 . The spun yarn according to  claim 7 , wherein, when a longest length except for the maximum width B of the cross section among lines between vertexes of both convex parts opposed to each other using the maximum length A as an axis of symmetry is taken as E, a convex part ratio defined by formula (3) is satisfied:
   Convex part ratio( E/B )=0.6 to 0.9   (3).
   
     
     
         10 . The spun yarn according to  claim 7 , wherein a single filament fineness of the polyester-based fiber having a flat multifoliar cross section is 2.0 dtex or less. 
     
     
         11 . The spun yarn according to  claim 7 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         12 . A woven or knitted fabric comprising the spun yarn according to  claim 7 . 
     
     
         13 . The spun yarn according to  claim 8 , wherein, when a longest length except for the maximum width B of the cross section among lines between vertexes of both convex parts opposed to each other using the maximum length A as an axis of symmetry is taken as E, a convex part ratio defined by formula (3) is satisfied:
   Convex part ratio( E/B )=0.6 to 0.9   (3).
   
     
     
         14 . The spun yarn according to  claim 8 , wherein a single filament fineness of the polyester-based fiber having a flat multifoliar cross section is 2.0 dtex or less. 
     
     
         15 . The spun yarn according to  claim 9 , wherein a single filament fineness of the polyester-based fiber having a flat multifoliar cross section is 2.0 dtex or less. 
     
     
         16 . The spun yarn according to  claim 13 , wherein a single filament fineness of the polyester-based fiber having a flat multifoliar cross section is 2.0 dtex or less. 
     
     
         17 . The spun yarn according to  claim 8 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         18 . The spun yarn according to  claim 9 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         19 . The spun yarn according to  claim 10 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         20 . The spun yarn according to  claim 13 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         21 . The spun yarn according to  claim 14 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         22 . The spun yarn according to  claim 15 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         23 . The spun yarn according to  claim 16 , wherein the polyester-based fiber having a flat multifoliar cross section contains an inorganic particle, and a content thereof is 0.2 to 2.5% by mass. 
     
     
         24 . A woven or knitted fabric comprising the spun yarn according to  claim 8 . 
     
     
         25 . A woven or knitted fabric comprising the spun yarn according to  claim 9 . 
     
     
         26 . A woven or knitted fabric comprising the spun yarn according to  claim 10 .