Process for manufacture of artificial leather
Abstract
Abstract A PROCESS FOR THE MANUFACTURE OF AN ARTIFICIAL LEATHER, WHICH COMPRISES A FIRST STEP WHEREIN A FLUFF-HOLDING HIGHMOLECULAR-WEIGHT POLYMER IS APPLIED TO THE SURFACE OF A FIBROUS SHEET MATERIAL AND THE SURFACE OF SAID FIBROUS SHEET MATERIAL IS CONTACTED WITH A SMOOTH SURFACE HEATED TO A TEMPERATURE NOT LOWER THAN THE GLASS TRANSITION POINT OF FIBERS THAT CONSTITUTE SAID FIBROUS SHEET MATERIAL BUT NOT HIGHER THAN THE MELTING POINT OF SAID HIGH-MOLECULARWEIGHT POLYMER TO THEREBY HOLD DOWN THE FLUFFS ON THE SURFACE OF THE SHEET MATERIAL AND A SECOND STEP WHEREIN A BINDER SOLUTION AND SUBSEQUENTLY A COATING SYNTHETIC RESIN SOLUTION ARE APPLIED TO SAID FIBROUS SHEET MATERIAL AND THEREAFTER COAGULATED.
Inventors
- 👤 Toshikazu Shinohara
- 👤 Toyohiko Hikota
- 👤 Hiroshi Hattori
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |