Artificial leather composed of dope-dyed polyester fiber and method of preparing the same

Abstract

An artificial leather composed of a dope-dyed polyester fiber is provided. The artificial leather includes a carbon black in island component of a sea-island composite fiber and a polyurethane polymer elastomer. It is possible to improve the fastness to light and the fastness to rubbing at medium and deeper color, and at the same time, to have a luxuriously high quality and to reduce the amount of dye used in the production of artificial leather.

1 . An artificial leather composed of dope-dyed polyester fiber, in which a black polymer elastomer is impregnated and a dispersion dye is dyed in a nonwoven fabric comprising sea-island type composite fiber of which an island component is black dope-dyed polyester. 
     
     
         2 . The artificial leather composed of dope-dyed polyester fiber of  claim 1 , wherein the black dope-dyed polyester comprises 0.08 to 3.00% by weight of a carbon black. 
     
     
         3 . The artificial leather composed of dope-dyed polyester fiber of  claim 1 , wherein the black polymer elastomer comprises 1 to 6% by weight of a carbon black. 
     
     
         4 . The artificial leather composed of dope-dyed polyester fiber of  claim 1 , which has fastness to light of at least grade 4, fastness to dry rubbing of at least grade 4 and fastness to wet rubbing of at least grade 4 according to ISO 105-B06: 1998 method (condition 5). 
     
     
         5 . A method of preparing artificial leather composed of dope-dyed polyester fiber comprising:
 preparing staple fiber from sea-island type composite fiber filament composed of black dope-dyed polyester comprising 0.08 to 3.00% by weight of a carbon black, as an island component;   preparing a nonwoven fabric by needle punching with the staple fiber;   Impregnating a polymer elastomer comprising 1 to 6% by weight of a carbon black in the nonwoven fabric;   forming napping by eluting a sea component of the sea-island type composite fiber from the nonwoven fabric to produce ultrafine fiber and grinding surface of the nonwoven fabric; and   dyeing nonwoven fabric using a dispersion dye.