Leather-like sheet and method of manufacturing the same
US8445391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2006 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Nov 4, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/637
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A leather-like sheet composed of a microfine-fiber entangled body made of bundles of microfine fibers and an elastic polymer impregnated therein. The bundles of microfine fibers are composed of microfine monofibers having an average cross-sectional area of 0.1 to 30 μm2 and have an average cross-sectional area of 40 to 400 μm2. The bundles of microfine fibers exist in a density of 600 to 4000/mm2 on a cross section taken along the thickness direction of the microfine-fiber entangled body. The elastic polymer contains 30 to 100% by mass of a polymer of ethylenically unsaturated monomer. The polymer of ethylenically unsaturated monomer is composed of a soft component having a glass transition temperature (Tg) of less than −5° C., a crosslinkable component, and optionally a hard component having a glass transition temperature (Tg) of higher than 50° C. and another component. The polymer of ethylenically unsaturated monomer is bonded to the microfine fibers in the bundles of microfine fibers. The leather-like sheet has a flexibility and hand such as dense feeling each resembling natural leathers and a high quality appearance. The leather-like sheet is highly stable in quality such as f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.