Method of non-woven fabric for base cloth of carpet

Abstract

The present invention relates to a method of preparing non-woven fabric for base cloth of carpet, which has an improved fixability of BCF yarn inserted on a base cloth in a tufting process by crimp processing a web with a stretched polyester filament and needle punching the web. The residual stress of the stretched polyester filament is eliminated and the formability of the non-woven fabric for base cloth of carpet is improved, and the fixability of the BCF yarn in the carpet can be improved by interlacing of polyester filament.

1 . A method of preparing non-woven fabric for base cloth of carpet comprising:
 preparing stretched polyester filament fiber having circular cross section;   forming a web by integrating the filament fiber in a web form, crimp processing and calendering it; and   needle punching the web.   
     
     
         2 . The method of preparing non-woven fabric for base cloth of carpet of  claim 1 , wherein the crimping processing is performed such that the stretched filament fiber is piled up on a conveyor net for forming the web and at same time, the stretched filament is treated at 100 to 150° C. for 30 to 60 seconds to form number of crimps of 20 to 40 per inch. 
     
     
         3 . The method of preparing non-woven fabric for base cloth of carpet of  claim 1 , wherein the needle punching is performed in a first step and a second step and in a condition of 300 to 400 stroke rpm in the first step and 600 to 800 stroke rpm in the second step. 
     
     
         4 . A non-woven fabric for base cloth of carpet prepared by the method of  claim 1 , which comprises a polyester filament fiber having a monofilament fineness of 4 to 7 denier, and has a pullout strength of 2.0 to 3.0 gf (strength to pull loop after loop type tufting) in the non-woven fabric. 
     
     
         5 . A non-woven fabric for base cloth of carpet prepared by the method of  claim 2 , which comprises a polyester filament fiber having a monofilament fineness of 4 to 7 denier, and has a pullout strength of 2.0 to 3.0 gf (strength to pull loop after loop type tufting) in the non-woven fabric. 
     
     
         6 . A non-woven fabric for base cloth of carpet prepared by the method of  claim 3 , which comprises a polyester filament fiber having a monofilament fineness of 4 to 7 denier, and has a pullout strength of 2.0 to 3.0 gf (strength to pull loop after loop type tufting) in the non-woven fabric.