Patent EP0123451A2 successfully refreshed from Google Patents.
EP0123451A2
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EP
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Method of spinning pitch-based carbon fibers
Assignee: EIDP Inc
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Filing: 1984-03-27
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Granted: —
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Expires: 2004-03-27
Abstract
Abstract A method of spinning a pitch precursor material to produce a continuous pitch-base carbon fiber (10), in which the precursor material is spun through capillaries (11) of a spinnerette (12) such that a fiber carrot (13) formed during spinning will exhibit a viscosity of at least 230 Pa.s at or near a point of spin reversal (17) of the fiber carrot (13).
Inventors
- 👤 Dennis Michael Riggs
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:39
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01D; D01D5/00; D01D5/08; D01F9/145; D01F9/32; D01F9/322
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal, to produce a fiber having a longitudinal alignment comprising undulating ribbons.
Claim 2
Independent Claim
65 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal, to produce a fiber having a longitudinal alignment comprising undulating ribbons.
Claim 3
Independent Claim
72 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal to produce a fiber having a substantially ordered graphite crystallite orientation and a longitudinal alignment comprising undulating ribbons.
Claim 4
Independent Claim
72 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal to produce a fiber having a substantially ordered graphite crystallite orientation and a longitudinal alignment comprising undulating ribbons.
Claim 5
Independent Claim
71 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal, to produce a fiber having a substantially radial textured cross-section and a longitudinal alignment comprising undulating ribbons.
Claim 6
Independent Claim
71 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said pitch precursor feed material through spinnerette capillaries under such conditions that a fiber carrot formed during said spinning will have a minimum maintained viscosity of at least 230 Pa.s (2300 poises) at spin reversal, to produce a fiber having a substantially radial textured cross-section and a longitudinal alignment comprising undulating ribbons.
Claim 7
Independent Claim
55 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said feed material through one or more spinnerette capillaries and maintaining in the fiber carrot initially formed a viscosity of at least 230 Pa.s (2300 poises) at the point or region where reversal of spin occurs.
Claim 8
Independent Claim
55 words
A method of spinning a pitch precursor feed material to produce a continuous pitch-base carbon fiber, characterised by spinning said feed material through one or more spinnerette capillaries and maintaining in the fiber carrot initially formed a viscosity of at least 230 Pa.s (2300 poises) at the point or region where reversal of spin occurs.
Claim 9
Dependent Claim
24 words
5 . A method as claimed in any preceding claim, wherein said minimum viscosity at spin reversal is maintained by decreasing the spinning temperature.
Claim 10
Independent Claim
26 words
A method as claimed in any preceding claim, wherein said minimum viscosity at spin reversal is maintained by increasing the viscosity of pre-spun pitch feed material.
Claim 11
Independent Claim
40 words
A method as claimed in any preceding claim, wherein said minimum viscosity at spin reversal is maintained by increasing the flow rate of the precursor feed material through said spinnerette capillaries and by increasing the diameters of said spinnerette capillaries.
References Cited (Backward Citations)
No citation records indexed.
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