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Carbon-fiber-precursor fiber bundle, carbon fiber bundle, and uses thereof
US10233569B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10233569-B2 |
| Application number | US-201815888230-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 5, 2018 |
| Priority date | Oct 13, 2010 |
| Publication date | Mar 19, 2019 |
| Grant date | Mar 19, 2019 |
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- Title
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Abstract
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A carbon fiber bundle, wherein an average single-fiber fineness is from 1.0 to 2.4 dtex and a roundness is from 0.7 to 0.9 in a shape of a cross-section perpendicular to a fiber axis of a single fiber; the roundness being determined with equation (1): roundness=4πS/L 2 , where S is a cross-sectional area of the single fiber and L is a circumferential length of the single fiber, and S and L are obtained by observing, under an SEM, the cross-section of the single fiber perpendicular to the fiber axis of the single fiber and analyzing the obtained image.
First claim
Opening claim text (preview).
The invention claimed is: 1. A carbon fiber bundle, wherein an average single-fiber fineness is from 1.0 to 2.4 dtex and a roundness is from 0.7 to 0.9 in a shape of a cross-section perpendicular to a fiber axis of a single fiber, and wherein a strand tensile strength is 4000 MPa or more. 2. The carbon fiber bundle according to claim 1 , wherein a diameter Di of the cross-section perpendicular to the fiber axis of the single fiber is from 8 to 20 μm. 3. The carbon fiber bundle according to claim 1 , having a plurality of groove-shaped concavo-convex structures extending in a lengthwise direction of the single fiber on a surface of the single fiber and a difference in height between a highest part and a lowest part of a circumference length of 2 μm of the single fiber is 80 nm or less. 4. The carbon fiber bundle according to claim 1 , wherein a strand tensile elastic modulus is 200 GPa or more. 5. The carbon fiber bundle according to claim 1 , wherein a total fineness is from 30000 to 90000 dtex. 6. The carbon fiber bundle according to claim 1 , having a plurality of groove-shaped concavo-convex structures extending in a lengthwise direction of the single fiber on a surface of the single fiber and a difference in height between a highest part and a lowest part of a circumference length of 2 μm of the single fiber is 50 nm to 80 nm.
Assignees
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Cross-sectional configuration of strand material is specified · CPC title
Physical dimension · CPC title
Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension · CPC title
Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes · CPC title
with carbon fibres · CPC title
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- What does patent US10233569B2 cover?
- A carbon fiber bundle, wherein an average single-fiber fineness is from 1.0 to 2.4 dtex and a roundness is from 0.7 to 0.9 in a shape of a cross-section perpendicular to a fiber axis of a single fiber; the roundness being determined with equation (1): roundness=4πS/L 2 , where S is a cross-sectional area of the single fiber and L is a circumferential length of the single fiber, and S and L are …
- Who is the assignee on this patent?
- Mitsubishi Chem Corp
- What technology area does this patent fall under?
- Primary CPC classification D01F9/12. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Mar 19 2019 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).