Fiber bundle with pieced part, process for producing same, and process for producing carbon fiber

A manufacturing method and fiber bundle technology, which are applied in the field of carbon fiber manufacturing, can solve problems such as good productivity, and achieve the effects of improving productivity, good heat removal, and suppressing heat storage

Active Publication Date: 2011-10-05
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, there is a tendency to improve the yarn breakage caused by the heat storage at the junction, but it cannot be said that the productivity is good because special equipment is required to make the end of the precursor fiber bundle into a flame-resistant fiber. method

Method used

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  • Fiber bundle with pieced part, process for producing same, and process for producing carbon fiber
  • Fiber bundle with pieced part, process for producing same, and process for producing carbon fiber
  • Fiber bundle with pieced part, process for producing same, and process for producing carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] The end portion 5 of the first precursor fiber bundle FB1 and the end portion 6 of the second precursor fiber bundle FB2 were superposed so that the length of the fiber bundle superimposed portion was 400 mm. use Figure 5 In the splicing device shown, two fiber bundles are joined at the fiber bundle overlapping portion. At this time, three fiber interlacing devices 51 were used. The hole diameters of the fluid injection holes in the first fluid injection hole array 71 and the second fluid injection hole array 72 of each fiber interlacing device 51 were set to 1.5 mm, and the array pitch of the fluid injection holes was set to 2.5 mm. The length (column interval) L between the two fluid ejection hole rows 71, 72 in the fiber bundle longitudinal direction was set to 30 mm. The first and second fiber bundles FB1 and FB2 that were superimposed were given a slack of 9.0% by the fiber bundle relaxing device 53 using a round bar.

[0154] Thereafter, pressurized air at a p...

Embodiment 2

[0158] The same fiber bundles as in Example 1 were prepared for the first precursor fiber bundle FB1 and the second precursor fiber bundle FB2. Separately, a connecting fiber bundle JFB composed of a carbon fiber bundle having a filament count of 24,000 and a thermal conductivity of 55 W / m·K was prepared. Fold the prepared 3 fiber bundles into image 3 status shown. The length of the overlapping portion of the first precursor fiber bundle FB1 and the carbon fiber bundle JFB and the length of the overlapping portion of the second precursor fiber bundle FB1 and the carbon fiber bundle JFB were each set to 400 mm. The distance between the end of the first precursor fiber bundle FB1 and the end of the second precursor fiber bundle FB2 was set to 500 mm.

[0159] use Figure 5 In the jointing device shown, the first precursor fiber bundle FB1 is joined to the carbon fiber bundle JFB at each fiber bundle overlapping portion, and the second precursor fiber bundle FB1 is joined to ...

Embodiment 3

[0172] A space is left between the first precursor fiber bundle FB1 and the second precursor fiber bundle FB2, and carbon fibers serving as connecting fiber bundles JFB with the number of filaments of 48,000, 24,000, and 12,000 are laminated at the facing ends. The bundles were spliced ​​to prepare three types of fiber bundle samples having spliced ​​portions. At this time, when joining the superimposed fiber bundles, first, a slack of 9.0% is given to the superimposed fiber bundles in the longitudinal direction, and then, in order to join the two fiber bundles at the superimposed portion, use 3 fiber interweaving devices 51. Each fiber interlacing device 51 has a first fluid injection hole row 71 and a second fluid injection hole row 72 . Pressurized air at a pressure of 0.4 MPa was injected for 2 seconds from the fluid injection holes arranged at intervals in the respective fluid injection hole arrays to intertwine the plurality of fibers forming the fiber bundles at the re...

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Abstract

A fiber bundle which has a pieced part formed by jetting a pressurized fluid against a fiber-bundle overlap formed either by directly superposing the ending part of a fiber bundle composed of many fibers on the beginning part of another fiber bundle composed of many fibers or by superposing the end part and the beginning part on a jointing fiber bundle composed of many fibers, whereby the many fibers of the fiber bundles are interlaced with one another to thereby piece up the fiber bundles. The pieced part comprises an opened-fiber part in which the fibers have been opened and interlaced-fiber parts respectively located on both sides thereof, each interlaced-fiber part being composed of a plurality of constituent interlaced parts located apart in the width direction for the fiber bundle. The fiber bundle having the pieced part, when fed to a process for producing a carbon fiber, is inhibited from suffering thermal damage to the pieced part, because the pieced part comprises the opened-fiber part and the interlaced-fiber parts.

Description

technical field [0001] The present invention relates to a fiber bundle having a joint joint, a method for producing the same, and a method for producing carbon fibers. When carbon fibers are produced from precursor fiber bundles for carbon fiber production, it may be necessary to continuously supply the precursor fiber bundles to the carbon fiber production process for a long period of time. In this case, it is necessary to prepare a continuous precursor fiber bundle in which the end of one of the two precursor fiber bundles for carbon fiber production and the start of the other are joined together. The fiber bundle having the spliced ​​portion of the present invention can be effectively used when producing the continuous precursor fiber bundle. Background technique [0002] Generally, a precursor fiber bundle for carbon fiber production is used in the carbon fiber production process. The precursor fiber bundle is usually prepared in a precursor fiber bundle supply unit in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22B65H69/00D01F6/18
CPCB65H2701/314B65H2701/38D01F9/22D02J1/08B65H69/06Y10T428/2913Y10T428/2918Y10T428/298B65H69/00D01F6/18
Inventor 三岛邦裕广濑孝光加藤公康尾崎充利渡边大树
Owner TORAY IND INC
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