US3200033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making paper and non-woven fabric from synthetic fibers
Assignee: Battelle-Institut
•
Filing: 1962-11-01
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Granted: 1965-08-10
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Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Grossteinbeck Rolf
- 👤 Schulze Walter
- 👤 Willicks Winfried
- 👤 Mindermann Herfried
- 👤 Tepel Gert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:45
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/24; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/08; D21H17/20; D21H17/33; D21H17/46; D21H17/53; D21H17/60; D21H5/00; D21H5/12; D21H5/1272; D21H5/129; D21H5/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
247 words
A METHOD OF PREPARING AN UNWOVEN WEB MATERIAL CONSISTING TO AT LEAST 50 PERCENT OF SYNTHETIC FIBERS, THE BALANCE BEING NATURAL FIBERS, SAID METHOD COMPRISING TREATING THE FIBERS WITH A WATER INSOLUBLE LUBRICANT MATERIAL FORMING IN THE LIQUID STATE A REMOVABLE FILM ON SAID FIBERS, AND WITH A LATENT ADHESIVE COMPOSITION COMPRISING ESSENTIALLY A POLYURETHANE FORMING MIXUTRE OF A POLYESTER HAVING AT LEAST ONE FREE HYDROXYL GROUP AND A POLYISOCYANATE WHOSE ISOCYANATE GROUPS ARE BLOCKED BY A MEMBER OF THE GROUP CONSISTING OF ALCOHOLS AND PHENOLS BUT ARE REACTIVE AT A TEMPERATURE OF ABOUT 100*C., BOTH SAID MATERIAL AND ADHESIVE COMPOSITION HAVING A MELTING POINT NOT HIGHER THAN 120*C. AND SAID LATENT ADHESIVE COMPOSITION HAVING A MELTING POINT HIGHER THAN SAID LUBRICANT MATERIAL, BEING SOLID AT ROOM TEMPERATURE AND BEING IMMISCIBLE WITH SAID LUBRICANT MATERIAL IN THE LIQUID STATE, PASSING AN AQUEOUS SLURRY OF THE FIBERS WITH SAID LUBRICANT MATERIAL AND LATENT ADHESIVE COMPOSITION THROUGH A PAPER MACHINE TO FORM A SHEET, SAID LUBRICANT MATERIAL AND LATENT ADESIVE COMPOSITION BEING ADDED IN A TOTAL AMOUNT OF 30 TO 50 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE DRY FIBERS, SUBJECTING THE FIBERS IN SAID MACHINE TO A TEMPERATURE SUFFICIENT TO MELT AND ACTIVATE SAID LATENT ADHESIVE COMPOSITION, SAID MOLTEN COMPOSITION-COLLECTING AS DROPLETS ON THE FILM OF THE LUBRICANT MATERIAL FORMED ON THE FIBERS AT THE CROSSING POINTS OF THE FIBERS, AND FINALLY CURING SAID COMPOSITION TO A SOLID BINDER BONDING THE FIBERS AT SAID CROSSING POINTS.
Claim 2
Independent Claim
247 words
A METHOD OF PREPARING AN UNWOVEN WEB MATERIAL CONSISTING TO AT LEAST 50 PERCENT OF SYNTHETIC FIBERS, THE BALANCE BEING NATURAL FIBERS, SAID METHOD COMPRISING TREATING THE FIBERS WITH A WATER INSOLUBLE LUBRICANT MATERIAL FORMING IN THE LIQUID STATE A REMOVABLE FILM ON SAID FIBERS, AND WITH A LATENT ADHESIVE COMPOSITION COMPRISING ESSENTIALLY A POLYURETHANE FORMING MIXUTRE OF A POLYESTER HAVING AT LEAST ONE FREE HYDROXYL GROUP AND A POLYISOCYANATE WHOSE ISOCYANATE GROUPS ARE BLOCKED BY A MEMBER OF THE GROUP CONSISTING OF ALCOHOLS AND PHENOLS BUT ARE REACTIVE AT A TEMPERATURE OF ABOUT 100*C., BOTH SAID MATERIAL AND ADHESIVE COMPOSITION HAVING A MELTING POINT NOT HIGHER THAN 120*C. AND SAID LATENT ADHESIVE COMPOSITION HAVING A MELTING POINT HIGHER THAN SAID LUBRICANT MATERIAL, BEING SOLID AT ROOM TEMPERATURE AND BEING IMMISCIBLE WITH SAID LUBRICANT MATERIAL IN THE LIQUID STATE, PASSING AN AQUEOUS SLURRY OF THE FIBERS WITH SAID LUBRICANT MATERIAL AND LATENT ADHESIVE COMPOSITION THROUGH A PAPER MACHINE TO FORM A SHEET, SAID LUBRICANT MATERIAL AND LATENT ADESIVE COMPOSITION BEING ADDED IN A TOTAL AMOUNT OF 30 TO 50 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE DRY FIBERS, SUBJECTING THE FIBERS IN SAID MACHINE TO A TEMPERATURE SUFFICIENT TO MELT AND ACTIVATE SAID LATENT ADHESIVE COMPOSITION, SAID MOLTEN COMPOSITION-COLLECTING AS DROPLETS ON THE FILM OF THE LUBRICANT MATERIAL FORMED ON THE FIBERS AT THE CROSSING POINTS OF THE FIBERS, AND FINALLY CURING SAID COMPOSITION TO A SOLID BINDER BONDING THE FIBERS AT SAID CROSSING POINTS.
Claim 3
Dependent Claim
39 words
AN UNWOVEN WEB CONSISTING AT LEAST OF 50 PERCENT OF SYNTHETIC FIBERS, THE BALANCE BEING NATURAL FIBERS, THE FIBERS BEING JOINED AT THEIR CROSSING POINTS ONLY BY A CURED POLYURETHANE AND BEING OTHERWISE SUBSTANTIALLY DISCONNECTED AND FREE OF COATING.
Claim 4
Dependent Claim
39 words
AN UNWOVEN WEB CONSISTING AT LEAST OF 50 PERCENT OF SYNTHETIC FIBERS, THE BALANCE BEING NATURAL FIBERS, THE FIBERS BEING JOINED AT THEIR CROSSING POINTS ONLY BY A CURED POLYURETHANE AND BEING OTHERWISE SUBSTANTIALLY DISCONNECTED AND FREE OF COATING.
References Cited (Backward Citations)
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Cited
US2680995A
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US2962762A
Cited
US3049466A
Cited
US3053609A
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US3096231A
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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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |