Multi-layered artificial leather material
Abstract
Abstract NATURAL LEATHER-LIKE SHEET MATERIAL OF HOMOGENEOUS MICROPOROUS STRUCTURE HAVING HIGH BENDING STRENGTH AND EXCELLENT MOISTURE-PERMEABILITY AND ABRASION RESISTANCE, WHICH ARE COMPOSED OF FOUR LAYERS: A SUBSTRATE LAYER OF NON-WOVEN FABRIC FINISHED WITH A SYNTHETIC BUTADIENIC RUBBER; A WOVEN FABRIC LAYER; A MICROPOROUS ADHESIVE LAYER CONSISTING A SPECIFIC POLYURETHANE AND CONJOINING THE ABOVE MENTIONED TWO LAYER AND; A MICROPOROUS GRAIN LAYER CONSISTING OF ANOTHER SPECIFIC POLYURETHANE WHICH HAS A DYANMIC MODULUS OF ELASTICITY HIGHER THAN THAT OF THE ADHESIVE LAYER AND COVERS UNIFORMLY THE TOP SURFACE OF THE WOVEN FABRIC LAYER. AN IMPROVED PROCESS FOR MANUFACTURING SUCH SHEET MATERIALS, WHICH COMPRISES SETTING A WOVEN FABRIC SUPERIMPOSED ON A SUBSTRATE, SIMULTANEOUSLY WITH COAGULATING A GRAIN LAYER POLYURETHANE RESIN LAID ONTHE WOVEN FABRIC; AND AN APPARATUS EMPLOYED THEREFOR ARE ALSO PROPOSED.
Inventors
- 👤 Saburo Oohara
- 👤 Koitsuro Amemiya
- 👤 Yasushi Nishijima
- 👤 Mitsuyoshi Fukushima
- 👤 Kunio Shimizu
Bibliographic Details
Claims Analysis
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |