US4439487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester/nylon bicomponent flament
Assignee: EIDP Inc
•
Filing: 1982-12-17
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Granted: 1984-03-27
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Expires: 2002-12-17
Abstract
Abstract Nylon/polyester bicomponent filaments of dumbbell cross-sectional shape having a jagged interfacial surface, the polyester being an antimony-free copolyester having 5-(sodium sulfo) isophthalate units. The surface of the bicomponent filament being at least 75% of one of the polymeric components.
Inventors
- 👤 Uel D. Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/32; D01F; D01F8/00; D01F8/04; D01F8/12; D01F8/14; Y; Y10; Y10S; Y10S57/00; Y10S57/908; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2927; Y10T428/2929; Y10T428/2931; Y10T428/2973
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A bicomponent filament having a dumbbell cross-sectional shape, consisting of between 35 and 65% by volume antimony-free polyethylene terephthalate modified with 0.5 to 3 mole percent 5-(sodium sulfo) isophthalate units, and a complementary amount of polyhexamethylene adipamide, the exterior surface of said bicomponent filament being at least 75% but not more than 95% of one of the polymeric components, the interfacial junction between the two polymeric components being at least in part jagged, said bicomponent filament being readily crimpable and dyeable, and having a high resistance to longitudinal splitting.
Claim 2
Dependent Claim
89 words
A bicomponent filament having a dumbbell cross-sectional shape, consisting of between 35 and 65% by volume antimony-free polyethylene terephthalate modified with 0.5 to 3 mole percent 5-(sodium sulfo) isophthalate units, and a complementary amount of polyhexamethylene adipamide, the exterior surface of said bicomponent filament being at least 75% but not more than 95% of one of the polymeric components, the interfacial junction between the two polymeric components being at least in part jagged, said bicomponent filament being readily crimpable and dyeable, and having a high resistance to longitudinal splitting.
Claim 3
Dependent Claim
25 words
The bicomponent filament of claim 1 in which the exterior surface of the filament is at least 75% but not more than 95% polyhexamethylene adipamide.
Claim 4
Dependent Claim
15 words
The filament of claim 2 in which both polymeric components contain about 0.3% titanium dioxide.
Claim 5
Dependent Claim
20 words
The filament of claim 2 in which the denier of the filament is in the range of 1 to 5.
Claim 6
Dependent Claim
30 words
The filament of claim 2 in which the neck in the dumbbell shaped cross-section is 30 to 60 percent of the diameter of the head of the dumbbell shaped cross-section.
Claim 7
Dependent Claim
21 words
The filament of claim 2 in which the interfacial junction between the two polymeric components is at least 15 percent jagged.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |