Carbon fiber bundle and method of manufacturing same
US-2019226124-A1 · Jul 25, 2019 · US
Method for producing carbon fiber bundle
US12221725B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12221725-B2 |
| Application number | US-202017638560-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2020 |
| Priority date | Aug 30, 2019 |
| Publication date | Feb 11, 2025 |
| Grant date | Feb 11, 2025 |
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Abstract
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The present invention provides a method for producing a carbon fiber bundle, the method including steps (b) to (e) described below: (b) an oil agent application step of applying a silicone oil agent to a precursor fiber bundle to produce an oil-agent-attached precursor fiber bundle; (d) a stabilization step of subjecting the oil-agent-attached precursor fiber bundle to an oxidization treatment to produce an oxidized fiber bundle; and (e) a carbonization step of carbonizing the oxidized fiber bundle, wherein the silicone oil agent has a skin over time at 250° C. of less than 40 minutes.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a carbon fiber bundle, the method comprising steps (b), (d), and (e) described below: (b) an oil agent application step of applying a silicone oil agent to a precursor fiber bundle to produce an oil-agent-attached precursor fiber bundle; (d) a stabilization step of subjecting the oil-agent-attached precursor fiber bundle to an oxidization treatment to produce an oxidized fiber bundle; and (e) a carbonization step of carbonizing the oxidized fiber bundle, wherein the silicone oil agent has a skin over time at 250° C. of less than 40 minutes. 2. The method according to claim 1 , further comprising, before the oil agent application step, (a) a preheating step of preheating the precursor fiber bundle at 200 to 250° C. 3. The method according to claim 1 , further comprising, after the oil agent application step and before the stabilization step, (c) a heating step of heating the oil-agent-attached precursor fiber bundle at 150 to 200° C. 4. The method according to claim 1 , wherein the silicone oil agent is a silicone oil agent containing an amino-modified silicone having a reactive terminal. 5. The method according to claim 1 , wherein the silicone oil agent is an oil-in-water emulsion. 6. The method according to claim 1 , wherein the silicone oil agent contains a polyoxyalkylene alkyl ether containing a polyoxyalkylene including both an ethylene oxide unit and a propylene oxide unit, and an alkyl group, and the polyoxyalkylene alkyl ether has a ratio of number of ethylene oxide units/number of propylene oxide units of 2 to 20. 7. The method according to claim 2 , further comprising, after the oil agent application step and before the stabilization step, (c) a heating step of heating the oil-agent-attached precursor fiber bundle at 150 to 200° C.
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Classifications
containing silicon in the main chain · CPC title
Fibres of carbon · CPC title
Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes · CPC title
from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide · CPC title
comprising unsaturated nitriles as the major constituent · CPC title
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- What does patent US12221725B2 cover?
- The present invention provides a method for producing a carbon fiber bundle, the method including steps (b) to (e) described below: (b) an oil agent application step of applying a silicone oil agent to a precursor fiber bundle to produce an oil-agent-attached precursor fiber bundle; (d) a stabilization step of subjecting the oil-agent-attached precursor fiber bundle to an oxidization…
- Who is the assignee on this patent?
- Teijin Ltd, Wacker Chemie Ag
- What technology area does this patent fall under?
- Primary CPC classification D01F9/225. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Feb 11 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).