Artificial leather

Patent metadata

Field	Value
Publication number	US-12480252-B2
Application number	US-202118036006-A
Country	US
Kind code	B2
Filing date	Nov 8, 2021
Priority date	Nov 30, 2020
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A natural leather-like patterned artificial leather is provided which has a pattern with excellent wear resistance, while having an excellently delicate design, where the artificial leather is composed of: a fiber entangled body which comprises, as a constituent, a nonwoven fabric 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. At least one surface of the artificial leather is a design surface having at least a piloerection part and a fused part, where the difference between the thickness of the piloerection part and the thickness of the fused part is from 0.05 mm to 0.20 mm; and the formulae (1) to (3) described below are satisfied.

Δ E* ab ≥5  (1)

0≤Δ H* ab ≤1  (2)

2 D ≤φ≤150  (3)

First claim

The invention claimed is:

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,
Δ E* ab ≥5  (1)

0≤Δ H* ab ≤1  (2)

2 D≤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.

2 . The artificial leather according to claim 1 , wherein the ultrafine fibers contain a black pigment in addition to the thermoplastic resin.

3 . The artificial leather according to claim 1 , wherein the elastomer contains a black pigment.

4 . The artificial leather according to claim 1 , wherein the average single fiber diameter of the ultrafine fibers is from 1.5 μm to 6.0 μm.

5 . The artificial leather according to claim 1 , wherein a piloerection length in the piloerection part on the surface is 200 μm or more and 500 μm or less.

6 . A vehicle interior material comprising the artificial leather according to claim 1 .

Assignees

• Toray Industries

Inventors

• Sakagami Konomi
• Honda Seiichiro
• Shinozaki Atsushi

Classifications

• D06N3/0011 Primary

  using non-woven fabrics · CPC title

• D06N3/0004

  using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier) · CPC title

• D06N2209/0807

  Coloured · CPC title

• D06N3/123

  with polyesters · CPC title

• D06N2211/28

  Artificial leather · CPC title