Artificial leather

Abstract

An artificial leather is provided that has supple flexibility, moderate resilience while being dense and satisfactory thickness, where the artificial leather includes, as constituent elements, a nonwoven fabric containing ultrafine fibers having an average single-fiber diameter of 0.1 μm or more and 10 μm or less, and an elastomer, the artificial leather satisfying Formulas (a) and (b) below: 0.5≤ F A /F B <1  (a) 0.5≤ F C /F B <1  (b) where F A , F B , and F C are respectively the fiber density (g/cm 3 ) in a layer on one surface side, the fiber density (g/cm 3 ) in a layer at the center in the thickness direction, and the fiber density (g/cm 3 ) in a layer on the other surface side when the artificial leather is trisected in the thickness direction.

1 . Artificial leather comprising, as constituent elements:
 a nonwoven fabric containing ultrafine fibers having an average single-fiber diameter of 0.1 μm or more and 10 μm or less; and   an elastomer,   
       the artificial leather satisfying Formulas (a) and (b) below:
   0.5≤ F   A   /F   B <1  (a)
 
   0.5≤ F   C   /F   B <1  (b)
 
 
       where F A , F B , and F C  are respectively a fiber density (g/cm 3 ) in a layer on one surface side, a fiber density (g/cm 3 ) in a layer at a center in a thickness direction, and a fiber density (g/cm 3 ) in a layer on another surface side when the artificial leather is trisected in the thickness direction. 
     
     
         2 . The artificial leather according to  claim 1 , further comprising at least one nap layer formed by nap raising. 
     
     
         3 . The artificial leather according to  claim 1  or  2 , further comprising at least one resin layer. 
     
     
         4 . The artificial leather according to  claim 3 , wherein the resin layer is discontinuously formed in a surface of the artificial leather. 
     
     
         5 . The artificial leather according to  claim 1  or  2 , further satisfying Formulas (c) and (d) below:
   0.6≤ P   A   /P   B <1  (c)
 
   0.6≤ P   C   /P   B <1  (d)
 
 
       where P A , P B , and P C  are respectively an elastomer density (g/cm 3 ) in the layer on the one surface side, an elastomer density (g/cm 3 ) in the layer at the center in the thickness direction, and an elastomer density (g/cm 3 ) in the layer on the other surface side when the artificial leather is trisected in the thickness direction. 
     
     
         6 . The artificial leather according to  claim 1 , wherein an overall density of the artificial leather is 0.2 g/cm 3  or more and 0.7 g/cm 3  or less. 
     
     
         7 . The artificial leather according to  claim 1 , wherein a thickness of the artificial leather is 0.8 mm or more and 4.0 mm or less.