Patent US3924045A successfully refreshed from Google Patents.
US3924045A
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Multi-layer conjugate fiber and process and apparatus for the preparation thereof
Assignee: Toray Industries Inc
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Filing: 1974-02-19
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Granted: 1975-12-02
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Expires: 1994-02-19
Abstract
Abstract Different fluid polymers are continuously discharged into a limited space, at the same time, with passages for the polymers being moved relative to spinning orifices of a spinneret. A multiple layer flow is formed in which the different polymers alternate in the direction of flow. When the multiple layer flow is passed through the orifices of the spinneret plate, cooled and solidified or dried and coagulated, a fiber is obtained in which the different polymers are alternately arranged along the fiber. The interfaces between the different polymers are parabolic curved surfaces.
Inventors
- 👤 Masafumi Ogasawara
- 👤 Masanori Akita
- 👤 Kazuhiko Saito
- 👤 Yoshikazu Kikuchi
- 👤 Mitsuhiro Shiokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/16; B29C48/17; B29C48/18; B29C48/21; B29C48/25; B29C48/36; B29C48/49; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/298
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A MULTIPLE LAYER CONJUGATE FIBER COMPRISING AT LEAST TWO DIFFERENT FIBER FORMING SYNTHETIC POLYMERS, WHEREIN THE SYNTHETIC POLYMERS ARE SUCCESSIVELY ARRANGED ALONG THE LENGTH OF THE FIBER AND EACH HAS AN ANNULAR RING-LIKE SHAPE IN CROSS SECTION AND A SUBSTANTIALLY PARABOLIC INTERFACE IN LONGITUDINAL SIDE SECTION WHEREIN THE DISTANCE BETWEEN TIPS OF CENTRAL COMPONENTS HAVING PARABOLIC CURVED SURFACES IS AT LEAST ABOUT 0.1M, AND WHEREIN TWO DIFFERENT SYNTHETIC POLYMERS ARE USED AND THE RELATIVE WEIGHT PERCENTAGES OF THE TWO IS WITHIN THE RANGE OF ABOUT 20/80 TO 80/20.
Claim 2
Dependent Claim
88 words
A MULTIPLE LAYER CONJUGATE FIBER COMPRISING AT LEAST TWO DIFFERENT FIBER FORMING SYNTHETIC POLYMERS, WHEREIN THE SYNTHETIC POLYMERS ARE SUCCESSIVELY ARRANGED ALONG THE LENGTH OF THE FIBER AND EACH HAS AN ANNULAR RING-LIKE SHAPE IN CROSS SECTION AND A SUBSTANTIALLY PARABOLIC INTERFACE IN LONGITUDINAL SIDE SECTION WHEREIN THE DISTANCE BETWEEN TIPS OF CENTRAL COMPONENTS HAVING PARABOLIC CURVED SURFACES IS AT LEAST ABOUT 0.1M, AND WHEREIN TWO DIFFERENT SYNTHETIC POLYMERS ARE USED AND THE RELATIVE WEIGHT PERCENTAGES OF THE TWO IS WITHIN THE RANGE OF ABOUT 20/80 TO 80/20.
Claim 3
Dependent Claim
20 words
A fiber as defined in claim 1, wherein the annular ring-like shape has at least 3 layers of annular ring.
Claim 4
Dependent Claim
19 words
A fiber as defined in claim 1, wherein the ring-like shape has at least 6 layers of annular ring.
Claim 5
Dependent Claim
58 words
A fiber as defined in claim 1, wherein, when two measurement lines are drawn and intersected at a right angle at the substantial center of the polymer existing at the center of the cross section, the number of intersections of one line with the polymer interfaces is greater than one-fourth the number of intersections along the other line.
Claim 6
Dependent Claim
18 words
A fiber as defined in claim 1, wherein the ring-like shape has an eccentric relationship with the fiber.
Claim 7
Dependent Claim
43 words
A fiber as defined in claim 1, wherein the intervals between the annular rings becomes substantially smaller in order from the center through the outer layer viewed in cross section, and the minimum interval at the outer layer is within about 2 microns.
Claim 8
Dependent Claim
19 words
A fiber as defined in claim 1, wherein the distance between central components adjoined with different polymers are unequal.
Claim 9
Dependent Claim
26 words
A fiber as defined in claim 1, wherein the length of the parabola in side section is at least about ten thousand times the fiber diameter.
Claim 10
Dependent Claim
17 words
A fiber as defined in claim 1, wherein the fiber has a cross section of non-circular shape.
Claim 11
Dependent Claim
46 words
A fiber as defined in claim 1, wherein the synthetic polymers are selected from the group consisting of polyolefin, polyamide, polyacrylonitrile, copolymer of acrylonitrile, polyester, chlorine-containing polymer, a fluorine-containing polymer, polystyrene, styrene polymer, copolymer of styrene, polymethyl methacrylate, copolymer of methyl methacrylate, polyethylene oxide and polyurethane.
Claim 12
Dependent Claim
15 words
A fiber as defined in claim 10, wherein the synthetic polymers are polyester and polyamide.
Claim 13
Dependent Claim
23 words
A fiber as defined in claim 1, wherein the difference in refractive index of the respective polymers is about 0.01 - 0.25 inclusive.
Claim 14
Dependent Claim
14 words
A fiber as defined in claim 1, wherein the respective polymers have different dyeability.
Claim 15
Dependent Claim
14 words
A fiber as defined in claim 1, wherein the respective polymers have different solubility.
Claim 16
Dependent Claim
23 words
A fiber as defined in claim 1, wherein the difference of melting point between the polymers is about 10* C to 200* C.
References Cited (Backward Citations)
JPS435178B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |