US4460649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite fiber
Assignee: Kolon Industries Inc
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Filing: 1982-09-02
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Granted: 1984-07-17
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Expires: 2002-09-02
Abstract
Abstract The present invention relates to a composite fiber consisting of two components, for example, such as a polyamide and a polyester, and to a multi-segment fiber wherein the two components thereof can be separated into a plurality of microfibers by chemical and physical treatments. Particularly, the invention relates to a composite fiber having low loss of weight in a chemical treatment and which can easily be separated into outer and inner components. After separation the composite fiber provides excellent performance.
Inventors
- 👤 Yeun H. Park
- 👤 Jong L. Woo
- 👤 Hak M. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; D01D; D01D5/00; D01D5/28; D01D5/30; D01F8/14; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2973
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A composite filter having a radius R and comprising an inner component and an outer component, one of said components being a fiber-forming polyamide and the other being a fiber-forming polyester, said inner component having a core and at least five wedge-shaped segments extending radially from said core, each of said segments having a minimum width, A, proximate said core and having an outer end; and said second component being disposed in and filling the spaces between said segments and overlying said outer ends in a layer of thickness, B, where 1/20R<A<1/4R, and 1/20R<B<1/8R.
Claim 2
Dependent Claim
94 words
A composite filter having a radius R and comprising an inner component and an outer component, one of said components being a fiber-forming polyamide and the other being a fiber-forming polyester, said inner component having a core and at least five wedge-shaped segments extending radially from said core, each of said segments having a minimum width, A, proximate said core and having an outer end; and said second component being disposed in and filling the spaces between said segments and overlying said outer ends in a layer of thickness, B, where 1/20R<A<1/4R, and 1/20R<B<1/8R.
Claim 3
Dependent Claim
29 words
A composite fiber as defined in claim 1, wherein said fiber-forming polyester is selected from the group consisting of polyethylene terephthalate, polytetramethylene terephthalate, polyethylene oxybenzoate and poly-1, 4-dimethylcyclohexane terephthalate.
Claim 4
Dependent Claim
42 words
A composite fiber as defined in claims 1 or 2, wherein said fiber-forming polyamide is selected from the group consisting of nylon 4, nylon 6, nylon 7, nylon 11, nylon 12, nylon 66, nylon 610, polymetaxylene adipamide, polyparaxylene decanamide and, polybiscyclohexyl methane-decanamide.
Claim 5
Dependent Claim
21 words
A composite fiber as defined in claim 1, wherein said fiber has a fineness ranging from 0.1 denier to 0.5 denier.
References Cited (Backward Citations)
CA701354A
Cited
US3853977A
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US4073988A
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JPS5593813A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |