US3838562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile yarn
Assignee: Celanese Corp
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Filing: 1972-08-25
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Granted: 1974-10-01
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Expires: 1992-08-25
Abstract
Abstract Tensile properties of acrylonitrile yarn dry spun from low boiling solvent are improved by heat treating the yarn while held at constant length. The treated yarn can be used as a precursor yarn to produce yarn of unusually high hot-wet modulus coupled with extremely low permanent set value.
Inventors
- 👤 I Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:37
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A HIGH ACRYLONITRILE CONTINUOUS FILAMENT YARN OF AT LEAST 90 PERCENT ACRYLONITRILE AND FROM ABOUT 0.1 TO 10 PERCENT OF A COPOLYMERIZED MONOMER, SAID YARN CHARACTERIZED BY A RESIDUAL ACETONITRILE SOLVENT CONTENT OF LESS THAN 35 PERCENT BY WEIGHT AND HAVING THE FOLLOWING PROPERTIES UNDER HOT-WET CONDITIONS AT 95*C., A HOT-WET MODULUS OF AT LEAST 6.5 GPD, AN ELONGATION AT THE BREAK OF AT LEAST 36 PERCENT, TENACITY OF AT LEAST 1.32, A TENSILE FACTOR OF AT LEAST 8.00 AND A PERMANENT SET FOLLOWING 10 PERCENT EXTENSION OF ABOUT 0 PERCENT.
Claim 2
Dependent Claim
91 words
A HIGH ACRYLONITRILE CONTINUOUS FILAMENT YARN OF AT LEAST 90 PERCENT ACRYLONITRILE AND FROM ABOUT 0.1 TO 10 PERCENT OF A COPOLYMERIZED MONOMER, SAID YARN CHARACTERIZED BY A RESIDUAL ACETONITRILE SOLVENT CONTENT OF LESS THAN 35 PERCENT BY WEIGHT AND HAVING THE FOLLOWING PROPERTIES UNDER HOT-WET CONDITIONS AT 95*C., A HOT-WET MODULUS OF AT LEAST 6.5 GPD, AN ELONGATION AT THE BREAK OF AT LEAST 36 PERCENT, TENACITY OF AT LEAST 1.32, A TENSILE FACTOR OF AT LEAST 8.00 AND A PERMANENT SET FOLLOWING 10 PERCENT EXTENSION OF ABOUT 0 PERCENT.
Claim 3
Dependent Claim
38 words
The yarn of claim 1 wherein said hot-wet modulus is at least 8.0 gpd, said elongation at the break is at least 40 percent, said tenacity is at least 1.35 and said tensile factor is at least 8.50.
Claim 4
Dependent Claim
17 words
The yarn of claim 1 wherein the acrylonitrile yarn contains from about 5 to 25 percent acetonitrile.
References Cited (Backward Citations)
US2603620A
Cited
US3194862A
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US3336428A
Cited
US3574177A
Cited
US3492805A
Cited
US3687918A
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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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |