Articifial leather having polyurethane surface finish layer
Abstract
Abstract AN ARTIFICAL LEATHER COMPOSED OF A FIBROUS SUBSTRATE. A MICROPOROUS POLYURETHANE LAYER, AND A POLYURETHANE SURFACE FINISH LAYER COATED ON SAID MICROPOROUS POLYURETHANE LAYER WHEREIN A SURFACE-UNIFINISHED ARTICLE CONSISTING OF SAID SUBSTRATE AND SAID MICROPOROUS POLYURTHENE LAYER HAS SPECIFIED RANGES OF THICKNESS, APPARENT DENSITY AND RATE OF WATER VAPOR PERMEABILITY, SAID POLYURETHANE SURFACE FINISH LAYER HAS A SPECIFIED RANGE OF THICKNESS; AND THE POLYURETHANE IN SAID SURFACE FINISH LAYER IS A MODIFIED POLYURETHANE COMPRISING A POLYOL OF A SPECIFIED CONTENT OF A POLYOXYETHYLENE SEGMENT AND PRODUCING FILMS HAVING SPECIFIED RANGES OF STRESS AT 10% ELONGATION AND RATE OF WATER VAPOR PERMEABILITY. THE MODIFIED POLYURETHANE OF SUCH COMPOSITION AND NATURE CONTRIBUTES TO THE EXCELLENT WATER VAPOR PERMEABILITY, TOUGHNESS, AND PHYSICAL OR MECHANICAL PROPERTIES OF THE ARTIFICAL LEATHER.
Inventors
- 👤 Koji Kigane
- 👤 Shinichi Yamada
- 👤 Kazuo Koga
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |