Melt-blown fiber web having improved elasticity and cohesion, and manufacturing method therefor

Abstract

The present invention relates to a melt-blown fiber web having improved elasticity and cohesion, and a manufacturing method therefor. The objective of the present invention is accomplished by a melt-blown fiber web comprising a thermoplastic resin which comprises 10 to 60 wt % of thermoplastic resin microfibers and 40 to 90 wt % of non-circular cross-sectional hollow conjugated staple fibers with respect to the total weight of the fiber web.

1 . A melt-blown fiber web comprising of thermoplastic resin, the melt-blown fiber web comprising 10 to 60 wt % of thermoplastic resin microfibers and 40 to 90 wt % of non-circular cross-sectional hollow conjugated staple fibers with respect to the total weight of the melt-blown fiber web. 
     
     
         2 . The melt-blown fiber web of  claim 1 , wherein the non-circular cross-sectional hollow conjugated staple fibers have a single fiber fineness of 1-50 denier and a hollow ratio of 10% or higher. 
     
     
         3 . The melt-blown fiber web of  claim 1 , wherein the non-circular cross-sectional hollow conjugated staple fibers are polygonal or tubular in cross section or have a protrusion/depression pattern at an outer circumferential portion thereof, and have an enlarged specific surface area. 
     
     
         4 . The melt-blown fiber web of  claim 1 , which comprises a horizontal fiber layer and a vertical fiber layer formed on the horizontal fiber layer, in which the horizontal fiber layer and the vertical fiber layer are continuously stacked and connected, and the vertical fiber layer is consisted of peaks and valleys, which have a height of 2 to 50 mm and are arranged at irregular intervals. 
     
     
         5 . The melt-blown fiber web of  claim 4 , wherein fibers at a top of the vertical fiber layer are entangled with one another to form an uppermost portion of a waved fiber web. 
     
     
         6 . The melt-blown fiber web of  claim 1 , which further comprises a covering fabric consisting of a spunbond nonwoven fabric on an upper surface and lower surface of the melt-blown fiber web. 
     
     
         7 . A method for producing a melt-blown fiber web, the method comprising the steps of:
 extruding a thermoplastic resin composition through an extruder;   spinning the extruded thermoplastic resin composition together with a high-temperature and high-pressure gas to form thermoplastic resin microfibers;   air-blending the thermoplastic resin microfibers with non-circular cross-sectional hollow conjugated staple fibers to form filaments;   producing a melt-blown fiber web by forming one portion of the filaments into a horizontal fiber layer and consecutively forming a vertical fiber layer on the horizontal fiber layer by bringing the other portion of the filaments into contact with a stack pattern change unit; and   winding the produced melt-blown fiber web.   
     
     
         8 . The melt-blown fiber web of  claim 2 , wherein the non-circular cross-sectional hollow conjugated staple fibers are polygonal or tubular in cross section or have a protrusion/depression pattern at an outer circumferential portion thereof, and have an enlarged specific surface area.