US3860685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for spinning multicomponent fibers
Assignee: Japan Exlan Co Ltd
•
Filing: 1968-09-17
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Granted: 1975-01-14
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Expires: 1988-09-17
Abstract
Abstract A method and apparatus for spinning multi-component fibers from at least two different fiber forming spinning solutions. The solutions are extruded concurrently through a common orifice, being fed thereto through two narrow channels and into a common narrow channel. The thus formed composite stream is flowed through a continuous slit-like narrow channel which is separate from adjacent channels for other composite streams. The channel is sufficiently long so that the stream remains therein for at least 0.1 seconds. Thereafter the composite stream is extruded through a spinnerette to form composite filaments which do not delaminate.
Inventors
- 👤 Kazumi Nakagawa
- 👤 Keijiro Kuratani
- 👤 Shinsaku Minami
- 👤 Zoda Keiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A method as claimed in claim 1 wherein the contacting time is at least 0.2 second.
Claim 2
Dependent Claim
24 words
A method as claimed in claim 1 wherein the spinning solutions are maintained at a temperature of 70*-90*C. when the solutions are aqueous solutions.
Claim 3
Independent Claim
176 words
An apparatus for spinning multi-component fibers from at least two different fiber-forming spinning solutions which comprises means for separately supplying a plurality of different spinning solutions, two narrow channels connected to the means for supplying the spinning solutions and respectively receiving the respective solutions, a common narrow channel into which said two narrow channels merge, another substantially identical and uniform cross-sectional dimension slit-like narrow channel into which said common narrow channel opens, said slit-like narrow channel receiving said solutions, and a spinnerette have orifices at the ends of said slit-like narrow channels and into which said slit-like narrow channels open directly, said slit-like narrow channels having a width D in a relation to the minimum diameter d of the spinnerette of 5d < or = D < or = 10 d whereby said solutions are kept in interfacial contact for a period of at least 0.1 second so as to form an intermediate area in the boundary layer of said solutions wherein the solutions are intermingled and mutually diffused prior to being extruded through said orifices.
Claim 4
Dependent Claim
45 words
An apparatus as claimed in claim 4 in which said apparatus has a replaceable member in which said slit-like narrow channels are present whereby the member can be replaced with a like member of different size to change the length of the slit-like narrow channels.
References Cited (Backward Citations)
US1975153A
Cited
US3038236A
Cited
US3239197A
Cited
US3195865A
Cited
US3416982A
Cited
US3223761A
Cited
US3341891A
Cited
US3318987A
Cited
US3414644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |