Fabrics made of fibers having square cross section

Abstract

Fibers of square cross sections are presented in the invention. The square fiber leads to higher packing density and results in higher wind resistance in fabrics as compared to the conventional round fibers and other polygonal fibers. Therefore, the square fiber is more suitable for manufacture of the windproof clothing. In addition, the square fibers exhibit higher luster than the round fibers and other polygonal fibers due to the flat and shiny fiber surface.

1 . A fabric of high wind resistance, made of melt-spinning fibers having square cross-section, wherein each side of the square cross-section has approximately equal length.  
   
   
       2 . The fabric as claimed in  claim 1 , wherein variation of each side of the polygonal cross-section of the fibers is less than 50% from the mean value.  
   
   
       3 . The fabric as claimed in  claim 2 , wherein variation of each side of the polygonal cross-section of the fibers is less than 5% from the mean value.  
   
   
       4 . The fabric as claimed in  claim 1 , in the form of woven fabric, knitted fabric or non-woven fabric.  
   
   
       5 . The fabric as claimed in  claim 1 , having a wind resistance higher than a fabric made of round fibers.  
   
   
       6 . The fabric as claimed in  claim 5 , having a wind resistance of more than 3 times higher than a fabric made of round fibers.  
   
   
       7 . The fabric as claimed in  claim 1 , having a luster higher than a fabric made of round fibers.  
   
   
       8 . The fabric as claimed in  claim 7 , having a luster of more than 2 times higher than a fabric made of round fibers.  
   
   
       9 . The fabric as claimed in  claim 1 , having a wind resistance higher than a fabric made of triangular fibers.  
   
   
       10 . The fabric as claimed in  claim 9 , having a wind resistance of more than 50% higher than a fabric made of triangular fibers.  
   
   
       11 . The fabric as claimed in  claim 1 , having a luster higher than a fabric made of triangular fibers.  
   
   
       12 . The fabric as claimed in  claim 11 , having a luster of more than 50% higher than a fabric made of triangular fibers.  
   
   
       13 . The fabric as claimed in  claim 1 , wherein the fiber is formed of a material selected from the group consisting of polyester, polyamide and polyolefin.  
   
   
       14 . The fabric as claimed in  claim 13 , wherein the polyester comprises poly(ethylene terephthalate), poly(proylene terephthalate), poly(cyclohexylenedimethylene terephthalate), poly(lactide), poly(butylene terephthalate), poly(glycolic acid), or poly(ethylene adipate).  
   
   
       15 . The fabric as claimed in  claim 13 , wherein the polyamide comprises nylon 6 (poly(6-aminohexanoic acid)), nylon 66 (poly(hexamethyleneadipamide)), nylon 4 (poly(4-aminobutyric acid)), nylon 11 (poly(1l-amino-undecanoic acid).  
   
   
       16 . The fabric as claimed in  claim 13 , wherein the polyolefin comprises polyethylene, polypropylene, polyisobutene, poly(4-methyl-1-pentene), poly(3-methyl-1-butene), or poly(1-hexene).