Long-fiber woven fabric and method for producing long-fiber woven fabric

Abstract

This long-fiber woven fabric comprises long fibers formed by two-component conjugate spinning from poly(ethylene terephthalate) and a copolyester, and has an apparent density of 0.1-0.25 g/cc and a recovery from 50% elongation of 55% or greater.

1 . A long-fiber nonwoven fabric comprising a long fiber of a bi-component conjugate spun yarn including polyethylene terephthalate and a copolymerized polyester,
 wherein   the long-fiber nonwoven fabric has an apparent density of 0.1 g/cc or more and 0.25 g/cc or less, and   has an elongation recovery rate at 50% elongation of 55% or more.   
     
     
         2 . The long-fiber nonwoven fabric according to  claim 1 , wherein the long-fiber nonwoven fabric has a 5% elongation load of 1.0 N/25 mm or less. 
     
     
         3 . The long-fiber nonwoven fabric according to  claim 1 , wherein the long fiber is a crimped yarn. 
     
     
         4 . The long-fiber nonwoven fabric according to  claim 1 , wherein the long fiber has a sheath-core structure. 
     
     
         5 . The long-fiber nonwoven fabric according to  claim 4 , wherein in the sheath-core structure, a center of a core component is eccentric by 2% or more. 
     
     
         6 . The long-fiber nonwoven fabric according to  claim 1 , wherein the long fiber has a side-by-side structure. 
     
     
         7 . The long-fiber nonwoven fabric according to  claim 1 , wherein the long-fiber nonwoven fabric has not been subjected to a mechanical interlacing treatment. 
     
     
         8 . The long-fiber nonwoven fabric according to  claim 1 , wherein the copolymerized polyester is composed of a dicarboxylic acid component being terephthalic acid and a glycol component being composed of 50 to 85 mol % of ethylene glycol and 15 to 50 mol % of neopentyl glycol. 
     
     
         9 . The long-fiber nonwoven fabric according to  claim 1 , which is used as a base fabric of a patch. 
     
     
         10 . A long-fiber nonwoven fabric comprising a long fiber of a bi-component conjugate spun yarn including polyethylene terephthalate and a copolymerized polyester,
 wherein   the long-fiber nonwoven fabric has an apparent density of 0.1 g/cc or more, and   has a 10% elongation recovery rate of 65% or more.   
     
     
         11 . The long-fiber nonwoven fabric according to  claim 10 , wherein the long fiber is a crimped yarn. 
     
     
         12 . The long-fiber nonwoven fabric according to  claim 10 , wherein the long fiber has a sheath-core structure. 
     
     
         13 . The long-fiber nonwoven fabric according to  claim 12 , wherein in the sheath-core structure, a center of a core component is eccentric by 2% or more. 
     
     
         14 . The long-fiber nonwoven fabric according to  claim 10 , wherein the long fiber has a side-by-side structure. 
     
     
         15 . The long-fiber nonwoven fabric according to  claim 10 , wherein the long-fiber nonwoven fabric has not been subjected to a mechanical interlacing treatment. 
     
     
         16 . The long-fiber nonwoven fabric according to  claim 10 , wherein the copolymerized polyester is composed of a dicarboxylic acid component being terephthalic acid and a glycol component being composed of 50 to 85 mol % of ethylene glycol and 15 to 50 mol % of neopentyl glycol. 
     
     
         17 . A method for producing the long-fiber nonwoven fabric according to  claim 1 , the method comprising:
 step A of discharging molten polyethylene terephthalate and a molten copolymerized polyester from a spinneret, cooling and solidifying them, and then pulling and stretching them with an ejector to form long fibers of a bi-component conjugate spun yarn;   step B of collecting the long fibers obtained in the step A to form a long-fiber web;   step C of temporarily pressure-bonding the long-fiber web; and   step D of applying crimp processing to the temporarily pressure-bonded long-fiber web.   
     
     
         18 . The method for producing the long-fiber nonwoven fabric according to  claim 17 , wherein the step D is a step of immersing the long-fiber web in boiling water at 80° C. or higher. 
     
     
         19 . The method for producing the long-fiber nonwoven fabric according to  claim 18 , the method comprising step E of stretching the long-fiber web in a cross direction after the step D. 
     
     
         20 . The method for producing the long-fiber nonwoven fabric according to  claim 19 , the method comprising step F of applying calender processing to the long-fiber web after the step E. 
     
     
         21 .- 25 . (canceled)