US 11,873,606 B2
Napped artificial leather and method for producing same
Hiroyuki Hattori, Okayama (JP); Yasuhiro Katou, Okayama (JP); Kazuyuki Suetoshi, Okayama (JP); and Rei Nagayama, Okayama (JP)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Appl. No. 17/298,124
Filed by KURARAY CO., LTD., Kurashiki (JP)
PCT Filed Dec. 10, 2019, PCT No. PCT/JP2019/048191
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/129741, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-239314 (JP), filed on Dec. 21, 2018.
Prior Publication US 2022/0049417 A1, Feb. 17, 2022
Int. Cl. D06N 3/14 (2006.01); D06N 3/00 (2006.01)
CPC D06N 3/0075 (2013.01) [D06N 3/0011 (2013.01); D06N 3/0077 (2013.01); D06N 3/14 (2013.01); D06N 2201/0209 (2013.01); D06N 2205/023 (2013.01); D06N 2209/0823 (2013.01); D06N 2211/106 (2013.01); D06N 2211/14 (2013.01); D06N 2211/263 (2013.01); D06N 2211/28 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A napped artificial leather, comprising:
a non-woven fabric comprising an entangled body of ultrafine fibers; and
an elastic polymer impregnated into the non-woven fabric;
wherein:
the napped artificial leather comprises, at least on one side thereof, a napped surface formed by napping the ultrafine fibers;
the ultrafine fibers comprise a pigment (A) in an amount of 0.5 mass % or more;
the elastic polymer comprises a positive amount of a pigment (B) in an amount up to 0.01 mass %;
the ultrafine fibers and the elastic polymer are undyed;
the napped surface has a lightness value of 25 or less in a color coordinate space (L*a*b* color space); and
a ratio of an area occupied by the elastic polymer observed on the napped surface to a total area of an area occupied by the ultrafine fibers observed on the napped surface and the area occupied by the elastic polymer observed on the napped surface is 0.5% or less.