Non-woven fabric for primary carpet backing and manufacturing method thereof

Abstract

The present disclosure relates to a nonwoven fabric for primary carpet backing and a method for manufacturing same, the non-woven fabric having different colors on the two sides thereof and improved mechanical property. More specifically, the present disclosure relates to a non-woven fabric for primary carpet backing and a method for manufacturing same, wherein any one surface of the two surfaces of appears in a range of white to grey and the opposite surface thereof appears in a range of dark grey to black, so that the separate manufacture of non-woven fabrics having various colors according to carpet colors is not required, which facilitates the inventory management of the non-woven fabric, achieves color matching between a carpet pile yarn and a nonwoven fabric for primary carpet backing, and improve the efficiency of the carpet manufacturing process.

1 . A nonwoven fabric for primary carpet backing, comprising: a first surface layer and a second surface layer,
 wherein the first surface layer and the second surface layer comprises a mixed filament yarn having a content ratio of a first filament including a first polyester having a melting point of 250° C. or more and a carbon black, and a second filament including a second polyester having a melting point of 190° C. or less of 95:5 to 85:15%, and   wherein the total content of the carbon black in the first surface layer is 0.06 to 0.15% by weight, and the total content of the carbon black in the second surface layer is 0.3 to 0.5% by weight.   
     
     
         2 . The nonwoven fabric for primary carpet backing according to  claim 1 , wherein the first filament constituting the first surface layer contains 0.07 to 0.15% by weight of the carbon black, and the first filament constituting the second surface layer contains 0.37 to 0.5% by weight of the carbon black. 
     
     
         3 . The nonwoven fabric for primary carpet backing according to  claim 1 , wherein a white index is 5.3 to 17.0 for the first surface layer, and 4.0 to 5.2 for the second surface layer. 
     
     
         4 . The nonwoven fabric for primary carpet backing according to  claim 1 , wherein in the case of tufting to manufacture a carpet, a reduction rate of tensile strength before and after tufting is 70% or less. 
     
     
         5 . A method for manufacturing a nonwoven fabric for primary carpet backing, the method comprising the steps of:
 melting a first polyester having a melting point of 250° C. or more containing carbon black for the first filament and a second polyester having a melting point of 190° C. or less for the second filament, respectively, discharging the molten polyester through a spinning nozzle, and bicomponent-spinning so that a content ratio of the first filament to the second filament is 95:5 to 85:15% by weight, thereby preparing a mixed filament yarn for web of the first row;   melting a first polyester having a melting point of 250° C. or more containing carbon black for the first filament and a second polyester having a melting point of 190° C. or less for the second filament, respectively, discharging the molten polyester through a spinning nozzle, and bicomponent-spinning so that a content ratio of the first filament to the second filament is 95:5 to 85:15% by weight, thereby preparing a mixed filament yarn for web of the second row;   laminating the mixed filament yarns for web of the first row to form a web of the first row, and laminating a web of the second row with the mixed filament yarn for web of the second row thereon to form a web in which the first row and the second row are laminated; and   subjecting the laminated web to calendering process using a smooth roll, and then thermally bonding the web with hot aft to manufacture the nonwoven fabric,   wherein the web of the first row contains 0.06 to 0.15% by weight of the carbon black, and the web of the second row contains 0.3 to 0.5% by weight of the carbon black.