Invention Grant
- Patent Title: Dyed artificial leather and a production method therefor
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Application No.: US15301154Application Date: 2015-03-20
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Publication No.: US10435838B2Publication Date: 2019-10-08
- Inventor: Masaru Masaki , Katsuya Okajima , Tomoharu Hirose , Ai Suzuki , Satoshi Yanagisawa
- Applicant: TORAY INDUSTRIES, INC.
- Applicant Address: JP
- Assignee: Toray Industries, Inc.
- Current Assignee: Toray Industries, Inc.
- Current Assignee Address: JP
- Agency: RatnerPrestia
- Priority: JP2014-072602 20140331; JP2014-172484 20140827
- International Application: PCT/JP2015/058527 WO 20150320
- International Announcement: WO2015/151873 WO 20151008
- Main IPC: D06N3/00
- IPC: D06N3/00 ; D06N3/14 ; D06P1/00

Abstract:
A dyed artificial leather includes a fibrous base containing ultrafine fibers with a filament fineness of 2 decitex or less and a polymeric elastomer, and characterized in that the lightness difference ΔL* between the ultrafine fibers and the polymeric elastomer represented by the following equation meet the requirement of −16≤ΔL*≤5: ΔL*=(average lightness L* of ultrafine fibers)−(average lightness L* of polymeric elastomer). A production method for dyed artificial leather includes a first dying step in which artificial leather constituted mainly of a fibrous base containing ultrafine fibers with a filament fineness of 2 decitex or less and a polymeric elastomer is dyed using a dye and a subsequent second dyeing step performed at a dye concentration that is 0.1% to 30% of the dye concentration (owf) in the first dyeing step.
Public/Granted literature
- US20170022659A1 DYED ARTIFICIAL LEATHER AND A PRODUCTION METHOD THEREFOR Public/Granted day:2017-01-26
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