Dyed artificial leather base material, napped artificial leather, resin layer-equipped artificial leather, shoes, decorating sheet, and decorative molded body

Abstract

Disclosed is an artificial leather base material having a surface with a lightness L* value of ≤50 and including a fiber base material that includes cationic dye-dyeable polyester fibers and an elastic polymer, the artificial leather base material being dyed with at least one cationic dye. Also provided is a resin layer-equipped artificial leather, a napped artificial leather, and a shoe that use the artificial leather base material is used. Also provided is a decorating sheet including the artificial leather base material, and a decorative molded body using the same.

1 . An artificial leather base material comprising:
 a fiber base material that comprises cationic dye-dyeable polyester fibers and an elastic polymer,   wherein the artificial leather base material is dyed with at least one cationic dye and has a surface with a lightness L* value of ≤50.   
     
     
         2 . The artificial leather base material according to  claim 1 ,
 wherein the fiber base material comprises a non-woven fabric of the cationic dye-dyeable polyester fibers and the elastic polymer.   
     
     
         3 . The artificial leather base material according to  claim 1 ,
 wherein the artificial leather base material has a grade of color difference, determined in an evaluation of color migration to a white polyvinyl chloride film with a thickness of 0.8 mm under a load of 750 g/cm 2  at 50° C. for 16 hours, of 4 or more.   
     
     
         4 . The artificial leather base material according to  claim 1 ,
 wherein, when a white polyurethane film with a thickness of 250 μm is pressure-bonded under heating to a surface of the artificial leather base material via a polyurethane adhesive under 5 Kg/cm 2  at 130° C. for 1 minute to form a resin layer-equipped artificial leather, and the resin layer-equipped artificial leather is pressurized under heating under 20 Kg/cm 2  at 150° C. for 1 minute, the artificial leather has a grade of color difference, determined in an evaluation of color migration to the white polyurethane film, of 3 or more.   
     
     
         5 . The artificial leather base material according to  claim 1 ,
 wherein the artificial leather base material has a grade of color difference, determined in an evaluation of color migration using methyl ethyl ketone (MEK), of 2 or more.   
     
     
         6 . The artificial leather base material according to  claim 1 ,
 wherein a product of a softness and a thickness of the artificial leather base material is 2 or more.   
     
     
         7 . The artificial leather base material according to  claim 1 ,
 wherein the artificial leather base material comprises 0.5 to 20 parts by mass of the at least one cationic dye, per 100 parts by mass of the fiber base material.   
     
     
         8 . The artificial leather base material according to  claim 1 ,
 wherein the artificial leather base material has a grade, determined in a water fastness test for a cotton cloth in accordance with JIS L 0846, of 4-5 or more.   
     
     
         9 . A resin layer-equipped artificial leather comprising:
 the artificial leather base material according to  claim 1 ; and   a resin layer stacked on at least one surface of the artificial leather base material.   
     
     
         10 . The resin layer-equipped artificial leather according to  claim 9 ,
 wherein the resin layer has a surface with a lightness L* value of >50.   
     
     
         11 . The resin layer-equipped artificial leather according to  claim 9 ,
 wherein a lightness difference ΔL* between the artificial leather base material and the resin layer is 10 or more.   
     
     
         12 . A napped artificial leather obtained by napping at least one surface of the artificial leather base material according to  claim 1 , the artificial leather base material having a surface with a lightness L* value of ≤50. 
     
     
         13 . A shoe comprising:
 the napped artificial leather according to  claim 12  as an upper material; and an outsole bonded to the upper material, the outsole having a lightness L* value of >50.   
     
     
         14 . A decorating sheet, comprising:
 the artificial leather base material according to  claim 1 .   
     
     
         15 . The decorating sheet according to  claim 14 ,
 wherein the decorating sheet is a preform molded body shaped into a three-dimensional shape.   
     
     
         16 . A decorative molded body comprising:
 a molded body to be decorated; and the decorating sheet according to  claim 14  that is stacked and integrated on the molded body to be decorated.   
     
     
         17 . The decorative molded body according to  claim 16 ,
 wherein the molded body to be decorated has a lightness L* value of >50.   
     
     
         18 . The decorative molded body according to  claim 16 ,
 wherein a lightness difference ΔL* between the decorating sheet and the molded body to be decorated is 10 or more.