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Production method and system of carbon fiber dry jet wet spinning precursor

A technology of dry-jet wet spinning and production system, which is applied in fiber treatment, fiber chemical characteristics, and complete sets of equipment for the production of artificial threads. To achieve the effect of reducing impact, reducing fluctuation, greatly reducing, and reducing impact

Active Publication Date: 2022-03-11
山东永成新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the technical problems of large fluctuations in the liquid level of the coagulation bath and large fluctuations in the temperature and concentration of the coagulation liquid in the existing system and method used in the coagulation forming process of the dry spray wet spinning, and provides a coagulation bath with small fluctuations in the liquid level, Method and system for producing carbon fiber dry-jet wet spinning raw silk with constant coagulation liquid temperature and concentration

Method used

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  • Production method and system of carbon fiber dry jet wet spinning precursor

Examples

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Embodiment 2

[0039] Different from Example 1, the coagulation bath outlet tow speed is 25m / min for spinning operation, and the coagulation bath temperature CV value is 0.68%, the coagulation bath concentration CV value is 0.48%, and the coagulation bath liquid level fluctuation maximum value 0.12mm.

Embodiment 3

[0041] Different from Example 1, the coagulation bath outlet tow speed is 30m / min for spinning operation, the coagulation bath temperature CV value is 0.74%, the coagulation bath concentration CV value is 0.56%, and the coagulation bath liquid level fluctuation maximum value 0.15mm.

[0042] The comparison of data in Examples 1-3 is shown in Table 1.

[0043] Table 1

[0044] Example Coagulation bath exit tow speed m / min Coagulation bath temperature CV value, % Coagulation bath concentration CV value, % Maximum fluctuation of coagulation bath liquid level, mm Example 1 20 0.5 0.4 0.10 Example 2 25 0.68 0.48 0.12 Example 3 30 0.74 0.56 0.15

[0045] It can be seen from the data in Table 1 that the temperature, concentration and circulation of the coagulation bath are the same, and only the drawing speed is different. The maximum fluctuation of the coagulation bath liquid level tends to increase, but even when the tow speed is a...

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Abstract

The invention provides a carbon fiber dry-spray wet spinning raw silk production method and system thereof, including a coagulation bath, an overflow collection tank, and a coagulation bath circulation tank. An overflow tank is provided above the coagulation bath, and a coagulation liquid inlet is provided on the coagulation bath. There is a steady flow plate at the bottom of the coagulation bath circulation tank, and a coagulation liquid supply pipeline is provided at the top of the coagulation bath circulation tank. , the connecting pipe is provided with a washing and replenishing pipeline, a washing and replenishing controller is arranged on the washing and replenishing pipeline, a cooler is connected to the filter, and a temperature controller is connected to the cooler. It solves the technical problems of large fluctuations in the liquid level of a coagulation bath and large fluctuations in the temperature and concentration of a coagulation liquid existing in the existing dry-jet wet spinning coagulation forming system and method. The invention can be widely used in the raw silk production process in carbon fiber production.

Description

technical field [0001] The invention relates to a production method and equipment for carbon fiber precursors, in particular to a production method and system for carbon fiber dry spray wet spinning precursors. Background technique [0002] In the process of industrial production of carbon fiber precursors, the dry-jet wet spinning process is usually used to produce high-performance carbon fibers. The dry-jet wet spinning process is adopted, and the spinneret is located above the coagulation bath liquid level, that is, the distance between the spinneret and the coagulation bath There is an "air section" on the liquid surface. The dry-jet wet spinning process requires the height of the "air section" to be kept constant. In actual production, since the spinning device is fixed, it is required that the height fluctuation of the coagulation bath liquid level must be " Very small", it is usually required that the height fluctuation of the coagulation bath liquid is not more than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D13/00D01D13/02D01D5/00D01F6/18
CPCD01D13/00D01D13/02D01D5/00D01F6/18
Inventor 林岩杨峰刘忠会杨文涛宋立志周占发赵敬东霍兆明尚晓明
Owner 山东永成新材料有限公司