US 12,480,252 B2
Artificial leather
Konomi Sakagami, Osaka (JP); Seiichiro Honda, Osaka (JP); and Atsushi Shinozaki, Osaka (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 18/036,006
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Nov. 8, 2021, PCT No. PCT/JP2021/040912
§ 371(c)(1), (2) Date May 9, 2023,
PCT Pub. No. WO2022/113708, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2020-197981 (JP), filed on Nov. 30, 2020.
Prior Publication US 2023/0416983 A1, Dec. 28, 2023
Int. Cl. D06N 3/00 (2006.01)
CPC D06N 3/0065 (2013.01) [D06N 3/0004 (2013.01); D06N 3/0011 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An artificial leather comprising:
a fiber entangled body which contains, as a constituent, a nonwoven fabric that is configured from ultrafine fibers that are formed from a thermoplastic resin, while having an average single fiber diameter of from 1 μm to 10 μm; and
an elastomer,
wherein at least one surface of the artificial leather is a design surface that has at least a piloerection part and a fused part; if a content of the thermoplastic resin in the piloerection part is taken as 100 parts by mass, a content of the thermoplastic resin in a fused material in the fused part is from 99 parts by mass to 100 parts by mass; a difference between a thickness of the piloerection part and a thickness of the fused part is from 0.05 mm to 0.19 mm; and formulae (1) to (3) described below are satisfied,
ΔE*ab≥5  (1)
0≤ΔH*ab≤1  (2)
2D≤φ≤150  (3)
here, ΔE*ab is a CIELAB1976L*a*b* color difference between the piloerection part and the fused part, ΔH*ab is a CIELAB1976 hue difference between the piloerection part and the fused part, D is the average single fiber diameter (μm) of the ultrafine fibers, and φ is a size (μm) of the fused material.