US4455341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sized multifilament yarn of an aromatic polyamide, a yarn package, a woven fabric and a process for making said yarn
Assignee: Akzo NV
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Filing: 1981-11-20
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Granted: 1984-06-19
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Expires: 2001-11-20
Abstract
Abstract A multifilament yarn of an aromatic polyamide, in particular poly-p-phenylene terephthalamide, having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex is provided with a water-soluble size, the filaments of the yarn having a cohesion corresponding to a Manra number not higher than 40. The yarn is made by subjecting a non-sized yarn having a moisture content which is lower than its equilibrium moisture content, while under a tension of at most 0.25 cN/dtex, to a continuous wetting treatment with an aqueous solution of a size and subsequently winding the treated yarn into a yarn package. The yarn package contains a single continuous length of the sized yarn. The sized yarn is suitable as warp and weft yarn in the weaving industry.
Inventors
- 👤 Evert Harteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/404; D02G3/406; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/605; D06; D06B; D06B21/00; D06M; D06M13/00; D06M13/52; D06M15/00; D06M15/19; D06M15/195; D06M15/37; D06M15/507; D06M15/70; D06M23/00; D06M23/06; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T442/00; Y10T442/30; Y10T442/3049; Y10T442/3057
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
A multifilament yarn of poly-p-phenylene terephthalamide having a tenacity of at least 15 cN/Dtex and an initial modulus of at least 400 cN/Dtex, characterized in that the yarn is provided with a water-soluble size from a film-forming polyester derived from at least a dicarboxylic acid, at least a diol, and a sulphonated dicarboxylic acid.
Claim 2
Dependent Claim
54 words
A multifilament yarn of poly-p-phenylene terephthalamide having a tenacity of at least 15 cN/Dtex and an initial modulus of at least 400 cN/Dtex, characterized in that the yarn is provided with a water-soluble size from a film-forming polyester derived from at least a dicarboxylic acid, at least a diol, and a sulphonated dicarboxylic acid.
Claim 3
Dependent Claim
20 words
A yarn according to claim 1, characterized in that the Manra number of the yarn is not higher than 20.
Claim 4
Dependent Claim
16 words
A yarn according to claim 1, characterized in that the yarn is substantially free from twist.
Claim 5
Dependent Claim
24 words
A yarn according to claim 1, characterized in that the size is a polyester derived from isophthalic acid, diethylene glycol and sulphonated isophthalic acid.
Claim 6
Dependent Claim
19 words
A yarn according to claim 1, characterized in that the yarn has a size content of 0.5-10% by weight.
Claim 7
Dependent Claim
20 words
A yarn according to claim 1, characterized in that the yarn also contains 0.5-15% by weight of a non-ionic wax.
Claim 8
Dependent Claim
31 words
A yarn according to claim 6, characterized in that the non-ionic wax consists of a triglyceride of a fatty acid having 18 carbon atoms and containing 6 to 10 epoxy groups.
Claim 9
Dependent Claim
13 words
A yarn according to claim 1, characterized in that the yarn is tangled.
Claim 10
Dependent Claim
24 words
A yarn according to claim 1, characterized in that the yarn has a linear density of tex 1-1000 and is composed of 10-5000 filaments.
Claim 11
Dependent Claim
24 words
A yarn according to claim 9, characterized in that the yarn has a linear density of tex 5-200 and is composed of 100-2000 filaments.
Claim 12
Dependent Claim
20 words
A yarn package, characterized in that it contains a single continuous length of sized multifilament yarn according to claim 1.
Claim 13
Dependent Claim
18 words
A woven fabric in which the warp and the weft threads comprises a yarn according to claim 1.
Claim 14
Dependent Claim
15 words
A woven fabric in which the weft threads comprise a yarn according to claim 1.
Claim 15
Dependent Claim
15 words
A woven fabric in which the warp threads comprise a yarn according to claim 1.
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |