Dyed artificial leather and a production method therefor
US10435838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2015 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Aug 30, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06N2211/28
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.