Kuraray Co., Ltd.

Yasunori Murate

Michinori Fujisawa

Hitoshi Nakatsuka

Yoshiki Nobuto

Norio Makiyama

Yoshiyuki Ando

Masaru Makimura

Takayuki Ikeda

Hiroyuki Hishida

Shinya Kawakado

Hidekazu Andoh

Tetsuya Ando

Daisuke Ohga

Disclosed is a leather-like sheet having a lightness L* of 35 or less, and including a fiber structure including fiber dyed with a dye composition including C.I. Basic Blue 3 and at least one blue cationic dye other than C.I. Basic Blue 3, and an elastic polymer contained in internal voids of the fiber structure, or the fiber structure. Also disclosed is a leather-like sheet having a lightness L* of 35 or less, and including a fiber structure including fiber dyed with an azo-based blue cationic dye, and an elastic polymer contained in internal voids of the fiber structure, wherein the leather-like sheet or the fiber structure has a color difference (&#x394;E), determined when treated for 48 hours under moist and hot conditions of 80&#xb0; C. and a moisture of 90%, of &#x394;E&#x2264;2. or the fiber structure.

Dyed leather-like sheet and fiber structure

Disclosed is a napped artificial leather dyed with a cationic dye, including: a non-woven fabric of a cationic dyeable polyester fiber having a fineness of 0.07 to 0.9 dtex; and an elastic polymer provided inside the non-woven fabric, wherein the napped artificial leather has L* value&#x2264;50, a grade of color difference determined in an evaluation of color migration to PVC under a load 0.75 kg/cm at 50&#xb0; C. for 16 hours, of 4 or more, a tear strength per mm of thickness of 30 N or more, and a peel strength of 3 kg/cm or more.

Napped artificial leather dyed with cationic dye, and method for manufacturing the same

A leather-like sheet containing a microfine long-fiber nonwoven fabric containing an entangled web structure made of bundles of microfine long fibers and an elastic polymer impregnated in the microfine long-fiber nonwoven fabric. The leather-like sheet has a machine direction/transverse direction ratio of breaking strength of 1/1 to 1.3/1, an elongation at break in each of the machine direction and the transverse direction of 80% or more, and a machine direction/transverse direction ratio of elongation at break of 1/1 to 1/1.5. The leather-like sheet has a natural dense feeling, a soft hand, a small difference of mechanical properties in the machine direction and the transverse direction, a moderate resistance to elongation and a durable recovery.

Leather-like sheet and process for producing the same

Growing community of inventors

Okayama, Japan

Yasunori Murate