US4606930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating fibers
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1985-02-25
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Granted: 1986-08-19
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Expires: 2005-02-25
Abstract
Abstract A method for treating fibers which comprises modifying the surface of a fiber of a polyester which shows anisotrophy in the molten state by subjecting the fiber to a low-temperature plasma irradiation, said method enabling to obtain fibers which comprise highly oriented molecules, are highly crystalline and hence exhibit a high tenacity and a high modulus of elasticity. The fibers thus obtained are suitable as a reinforcing material, exhibit an excellent adhesion to matrices to be reinforced and can give a satisfactory strength to the resulting composite material.
Inventors
- 👤 Katsuji Ueno
- 👤 Hiroaki Sugimoto
- 👤 Kazuo Hayatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:09
CPC Classifications
D; D06; D06M; D06M10/00; D06M10/02; D06M10/025; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A method for treating fibers which comprises modifying the surface of a fiber of a wholly aromatic polyester which shows anistropy in the molten state by subjecting the fiber to a low-temperature plasma irradiation.
Claim 2
Independent Claim
34 words
A method for treating fibers which comprises modifying the surface of a fiber of a wholly aromatic polyester which shows anistropy in the molten state by subjecting the fiber to a low-temperature plasma irradiation.
Claim 3
Dependent Claim
72 words
A method for treating fibers according to claim 1, wherein the polyester is (1) a copolyester formed of 40 to 70% by mole of p-hydroxybenzoic acid, 15 to 30% by mole of an aromatic dicarboxylic acid, and 15 to 30% by mole of an aromatic diphenol; (2) a copolyester formed of terephthalic acid and/or isophthalic acid, and chlorohydroquinone, phenylhydroquinone and/or hydroquinone; or (3) a copolyester formed of p-hydroxybenzoic acid and 2-hydroxynaphthalene-6-carboxylic acid.
Claim 4
Dependent Claim
23 words
A method for treating fibers according to claim 1, wherein the low-temperature plasma is a plasma formed by glow discharge or corona discharge.
References Cited (Backward Citations)
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US3888753A
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US4091855A
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US4159365A
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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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |