US 12,325,952 B2
Napped artificial leather and method for producing the same
Hiroyuki Hishida, Okayama (JP); Kimio Nakayama, Okayama (JP); and Masashi Meguro, Okayama (JP)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Appl. No. 17/757,785
Filed by KURARAY CO., LTD., Kurashiki (JP)
PCT Filed Dec. 3, 2020, PCT No. PCT/JP2020/045141
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/131591, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-234821 (JP), filed on Dec. 25, 2019.
Prior Publication US 2023/0340723 A1, Oct. 26, 2023
Int. Cl. D06N 3/00 (2006.01)
CPC D06N 3/0004 (2013.01) [D06N 3/0011 (2013.01); D06N 3/0027 (2013.01); D06N 3/0065 (2013.01); D06N 3/0075 (2013.01); D06N 3/0077 (2013.01); D06N 2209/0823 (2013.01)] 18 Claims
 
1. A napped artificial leather, comprising:
a fiber-entangled body obtained by entangling ultrafine fibers; and
an elastic polymer impregnated into the fiber-entangled body,
the napped artificial leather having, on at least one side thereof, a napped surface formed by napping the ultrafine fibers,
wherein the ultrafine fibers are fibers of at least one thermoelastic resin selected from the group consisting of an aromatic polyester, an aliphatic polyester, a nylon and a polyolefin,
the ultrafine fibers comprise 0.2 to 8 mass % of carbon black and 0.1 to 5 mass % of a chromatic pigment, and a total ratio of the carbon black and the chromatic pigment is 0.3 to 10 mass %,
a content ratio of the elastic polymer is 0.1 to 15 mass % in the napped artificial leather, and
the elastic polymer is uncolored, and the ultrafine fibers are undyed.