Ultra-fine high-strength polyamide multifilament, and covering yarn, stocking, and fabric using same

Abstract

A polyamide multifilament has a total fineness of 4.0-6.0 dtex, a single yarn fineness of 1.2 dtex or below, a strength-elongation product of 9.1 or above, and an elongation degree of 40-50%. A polyamide fiber has a small total fineness and single fiber fineness while having a high strength-elongation product and exhibiting a low unevenness (U%) in the longitudinal direction. Stockings exhibit an excellent higher-order process passability and productivity and exhibit an excellent softness, durability, and transparent feel and a fabric exhibits an excellent softness and durability.

1 - 6 . (canceled) 
     
     
         7 . An ultrafine, high strength polyamide multifilament having a total fineness of 4.0 dtex to 6.0 dtex, a single fiber fineness of 1.2 dtex or less, a strength-elongation product of 9.1 or more, and an elongation degree of 40% to 50%. 
     
     
         8 . The ultrafine, high strength polyamide multifilament as set forth in  claim 7 , further having a yarn unevenness (U%) of 1.2 or less. 
     
     
         9 . The ultrafine, high strength polyamide multifilament as set forth in  claim 7 , further having a sulfuric acid relative viscosity of 2.5 to 3.5. 
     
     
         10 . A covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 7 . 
     
     
         11 . Stockings partly comprising a covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 10 . 
     
     
         12 . A woven fabric comprising an ultrafine, high strength polyamide multifilament as set forth in  claim 7  used as warp and/or weft. 
     
     
         13 . The ultrafine, high strength polyamide multifilament as set forth in  claim 8 , further having a sulfuric acid relative viscosity of 2.5 to 3.5. 
     
     
         14 . A covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 8 . 
     
     
         15 . A covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 9 . 
     
     
         16 . Stockings partly comprising a covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 14 . 
     
     
         17 . Stockings partly comprising a covering yarn produced by cladding an ultrafine, high strength polyamide multifilament as set forth in  claim 15 . 
     
     
         18 . A woven fabric comprising an ultrafine, high strength polyamide multifilament as set forth in  claim 8  used as warp and/or weft. 
     
     
         19 . A woven fabric comprising an ultrafine, high strength polyamide multifilament as set forth in  claim 9  used as warp and/or weft.