US4237187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly oriented, partially drawn, untwisted, compact poly(ε-caproamide) yarn
Assignee: Honeywell International Inc
•
Filing: 1979-02-26
•
Granted: 1980-12-02
•
Expires: 1999-02-26
Abstract
Abstract A process for producing a highly oriented, partially drawn, untwisted, compact poly(ε-caproamide) yarn at windup speeds of from 3500 to 6000 meters per minute is disclosed. The process features the steps of overfeeding the yarn, by from 0.5 to 2.0 percent, to entangling means, and overfeeding the shrinking yarn to the winder. The yarn is "drawn" in the quench stack. Draw-twisting is omitted by this process; yarn so produced performs as well as conventional, draw-twisted yarn in end use applications, e.g., knitting and weaving.
Inventors
- 👤 James C. Raybon, Jr.
- 👤 Malcolm O. Darby
- 👤 Thomas V. Derrick, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:42
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/12; D01D5/16; D01F; D01F6/00; D01F6/58; D01F6/60; D02; D02J; D02J1/00; D02J1/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2973; Y10T428/2976
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A highly oriented-as-spun, partially drawn, untwisted, compact, interlaced multifilament poly(ε-caproamide) yarn characterized by a denier as high as 400, approximately 8 to 28 entanglements per meter of yarn, a residual draw ratio required to produce a yarn with 45 percent elongation of at most 1.3, an elongation at break of between about 45 and 70 percent, a boil shrinkage at 100° C. of approximately 7 to 8 percent, and a tenacity of about 3.8 to 4.6 grams per denier.
Claim 2
Dependent Claim
79 words
A highly oriented-as-spun, partially drawn, untwisted, compact, interlaced multifilament poly(ε-caproamide) yarn characterized by a denier as high as 400, approximately 8 to 28 entanglements per meter of yarn, a residual draw ratio required to produce a yarn with 45 percent elongation of at most 1.3, an elongation at break of between about 45 and 70 percent, a boil shrinkage at 100° C. of approximately 7 to 8 percent, and a tenacity of about 3.8 to 4.6 grams per denier.
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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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |