US4405686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimpable conjugate filamentary yarns having a flattened cross-sectional configuration
Assignee: Teijin Ltd
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Filing: 1982-06-07
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Granted: 1983-09-20
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Expires: 2002-06-07
Abstract
Abstract A conjugate filamentary yarn, which is prepared from composite components respectively comprising thermoplastic elastomer and non-elastomeric polyamide or polyester, and each of the individual constituents has a cross section of a compressed flat shape like a cocoon or oval, is provided. Hereby, a highly stretchable crimped elastic yarn, in which stretchability arising from crimp and rubber-like elasticity resulting from elastomer are utilized to the utmost, is made available with economy.
Inventors
- 👤 Toshimasa Kuroda
- 👤 Seiji Ishii
- 👤 Tatsuya Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:03
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; D01D5/28; D01D5/30; D01F; D01F8/00; D01F8/04; D01F8/12; D01F8/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2929; Y10T428/2931; Y10T428/2973; Y10T428/298
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
154 words
A conjugate filamentary yarn, characterized in that each of the individual constituents whose cross-sectional view presents a compressed flat figure, which comprises an elastomeric thermoplastic elastomer and a non-elastomeric polyamide or a polyester, wherein the respective components are arranged in such a way as to satisfy the following formulas (I) to (III) simultaneously: ##EQU5## where a indicates the length of the minor axis which passes the centroid on the cross section of the filament; b, the length of the major axis which passes the centroid on the cross section of the filament; EA, the area occupied by the thermoplastic elastomer on the cross section of the filament; PA, the area occupied by non-elastomeric polyamide or polyester on the cross section of the filament; and EiPi, the distance between the centroid Ei of the thermoplastic elastomer component on the cross section of the filament and the centroid Pi of the non-elastomeric polyamide or polyester component.
Claim 2
Dependent Claim
154 words
A conjugate filamentary yarn, characterized in that each of the individual constituents whose cross-sectional view presents a compressed flat figure, which comprises an elastomeric thermoplastic elastomer and a non-elastomeric polyamide or a polyester, wherein the respective components are arranged in such a way as to satisfy the following formulas (I) to (III) simultaneously: ##EQU5## where a indicates the length of the minor axis which passes the centroid on the cross section of the filament; b, the length of the major axis which passes the centroid on the cross section of the filament; EA, the area occupied by the thermoplastic elastomer on the cross section of the filament; PA, the area occupied by non-elastomeric polyamide or polyester on the cross section of the filament; and EiPi, the distance between the centroid Ei of the thermoplastic elastomer component on the cross section of the filament and the centroid Pi of the non-elastomeric polyamide or polyester component.
Claim 3
Dependent Claim
21 words
A conjugate filamentary yarn according to claim 1, wherein the cross section of the filament takes the shape of a cocoon.
Claim 4
Dependent Claim
21 words
A conjugate filamentary yarn according to claim 1, wherein the cross section of the filament takes the shape of an oval.
Claim 5
Dependent Claim
44 words
A conjugate filamentary yarn according to claim 1, wherin the centroid of said thermoplastic elastomer (Ei) and the centroid of said non-elastomeric polyamide or polyester (Pi) are located on the major axis which passes the centroid i on the cross section of the filament.
Claim 6
Dependent Claim
17 words
A conjugate filamentary yarn according to claim 1, wherein said filament is prepared in a side-by-side arrangement.
Claim 7
Dependent Claim
18 words
A conjugate filamentary yarn according to claim 1, wherein said filament is prepared in an eccentric sheath-core arrangement.
Claim 8
Dependent Claim
28 words
A conjugate filamentary yarn according to claim 1, wherein the hardness of said thermoplastic elastomer (measured according to JIS K-6301) is within the range of 90 to 100.
Claim 9
Dependent Claim
18 words
A conjugate filamentary yarn according to claim 1, wherein said thermoplastic elastomer is elastomer of the polyurethane type.
Claim 10
Dependent Claim
18 words
A conjugate filamentary yarn according to claim 1, wherein said thermoplastic elastomer is elastomer of the polyamide type.
Claim 11
Dependent Claim
15 words
A conjugate filamentary yarn according to claim 1, wherein said non-elastomeric polyamide is nylon 6.
Claim 12
Dependent Claim
18 words
A conjugate filamentary yarn according to claim 1, wherein said non-elastomeric polyester is polyethylene terephthalate or polybutylene terephthalate.
Claim 13
Dependent Claim
22 words
A conjugate filamentary yarn according to claim 11, wherein said non-elastomeric polyester is a polyester which is copolymerized with 5-sodium isophthalic acid.
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |