Modified cellulosic fibers and products containing said fibers
Abstract
Abstract TWISTED, FLEXIBLE, MODIFIED, CELLULOSIC FIBERS WHICH EXHIBIT IMPROVED PROPERTIES, SUCH AS REDUCED SWELLABILITY, COMPRISE WOOD PULP FIBERS COATED WITH A SUBSTANTIVE POLYMERIC COMPOUND. THE ABOVE-MENTIONED FIBERS ARE PRODUCED BY A THREE-STEP PROCESS WHICH COMPRISES TREATING AN AQUEOUS SLURRY OF THE CELLULOSIC FIBERS WITH A SUBSTANTIVE POLYMERIC COMPOUND, DRYING THE TREATED FIBERS TO CAUSE THE POLYMERIC COMPOUND TO REACT WITH ITSELF AND WITH THE FIBERS UNDER CONDTIONS WHEREIN THE FIBERS ARE RELATIVELY FREE FROM CONTACT WITH ONE ANOTHER, AND REFIBERIZING THE TREATED AND DRIED FIBERS UNDER DRY CONTITIONS TO SEPARATE INDIVIDUAL MODIFIED FIBERS. THE MODIFIED FIBERS ARE USEFUL IN THE PREPARATION OF COHERENT, DRYFORMED WEBS HAVING IMPROVED PROPERTIES, SUCH AS ENHANCED WET AND DRY RESILIENCY, INCREASED BREAKING LENGTH, AND IMPROVED SHAPE RETENTION WHEN EITHER WET OR DRY.
Inventors
- 👤 E Wodka
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |