Base for synthetic leather and synthetic leathers made by using the same
US7932192B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2006 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Jul 22, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/689
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A substrate for artificial leathers, comprising a nonwoven fabric body made of microfine fiber bundles and an elastic polymer impregnated therein. The substrate for artificial leathers simultaneously satisfies the following requirements 1 to 4: (1) each of the microfine fiber bundles contains 6 to 150 bundled microfine long fibers in average; (2) a cross-sectional area of the microfine long fibers constituting the microfine fiber bundles is 27 μm2 or less, and 80% or more of the microfine long fibers has a cross-sectional area of from 0.9 to 25 μm2; (3) an average cross-sectional area of the microfine fiber bundles is from 15 to 150 μm2; and (4) on a cross section parallel to a thickness direction of the nonwoven fabric body, cross sections of the microfine fiber bundles exist in a density of from 1000 to 3000/mm2 in average. The raised artificial leathers and grain-finished artificial leathers made from the substrate for artificial leathers are excellent in the properties which are hitherto difficult to be combined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.