Nonwoven fabric having enhanced withdrawal force for carpet backing fabric and production method thereof

Abstract

The present disclosure relates to a nonwoven fabric having enhanced withdrawal force for a carpet backing fabric, which is composed of a nonwoven fabric comprising 50 to 90% by weight of polyester filaments having a melting point of 250° C. or higher and 10 to 50% by weight of low-melting point copolyester filaments having a melting point of 200° C. or lower. According to the present disclosure, a nonwoven fabric comprising low-melting point polyester fibers is used as a backing fabric and the thickness of the backing fabric is controlled, so that the withdrawal force of carpets is enhanced, thereby suppressing the falling out of BCF yarns from the carpet.

1 . A nonwoven fabric having enhanced withdrawal force for a carpet backing fabric, which comprises: 50 to 90% by weight of polyester first filaments having a melting point of 250° C. or higher and 10 to 50% by weight of low-melting point copolyester second filaments having a melting point of 200° C. or lower, wherein loop withdrawal force of carpets is 2.0 to 3.0 kgf (Method KS K ISO 4919). 
     
     
         2 . The nonwoven fabric having enhanced withdrawal force for a carpet backing fabric according to  claim 1 , wherein the thickness of the nonwoven fabric is in the range of 0.33 to 0.46 mm while having the weight per unit area of 70 to 110 g/m 2 . 
     
     
         3 . The nonwoven fabric having enhanced withdrawal force for a carpet backing fabric according to  claim 1 , wherein the first filament has a fineness of 4 to 10 denier, and the second filament has a fineness of 1 to 5 denier. 
     
     
         4 . The nonwoven fabric having enhanced withdrawal force for a carpet backing fabric according to  claim 1 , wherein the first filaments and the second filaments of the nonwoven fabric are heat-bonded by a hot air due to a heated air stream. 
     
     
         5 . A method for producing a nonwoven fabric having enhanced withdrawal force for a carpet backing fabric, comprising:
 a step of spinning and blending a first filament made of a polyester having a melting point of 250° C. or higher and a second filament made of a low melting point copolyester having a melting point of 200° C. or lower;   a step of web forming the first filament to have a content of 50 to 90% by weight and the second filament to have a content of 10 to 50% by weight;   a step of subjecting the web to a calendering process using smooth rolls and a heat bonding process using hot air to produce a nonwoven fabric; and   a step of tufting the nonwoven fabric and treating the fabric with a coating material to manufacture a carpet.