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Three-stage boiling water drafting device and method for large-tow carbon fiber precursor production

A carbon fiber raw fiber and drafting device technology, which is applied in the directions of filament generation, drawing spinning, and complete sets of equipment for producing artificial threads, etc. , to achieve the effect of improving physical and mechanical properties, easy three-level effective drafting, and ensuring production quality

Pending Publication Date: 2022-04-22
山东永成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a large tow suitable for industrial production in order to solve the technical problems of difficulty in drafting and easy generation of fluff, broken filaments, hairballs, etc. Three-stage boiling water drawing device and method for carbon fiber precursor production

Method used

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  • Three-stage boiling water drafting device and method for large-tow carbon fiber precursor production
  • Three-stage boiling water drafting device and method for large-tow carbon fiber precursor production
  • Three-stage boiling water drafting device and method for large-tow carbon fiber precursor production

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Experimental program
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Effect test

Embodiment 1

[0042] Use a kind of large tow carbon fiber precursor of the present invention to produce the method for three-stage boiling water drawing device, control the temperature of the third stage boiling water drawing tank 7 at 99 ℃, the drafting ratio of the third stage boiling water drawing tank is 1.85 times; control the temperature of the second-stage boiling water drawing tank 7 at 97°C, and the draw ratio of the second-stage boiling water drawing tank is 1.85 times; control the temperature of the first-stage boiling water drawing tank 7 at 94°C, The drafting ratio of the first-stage boiling water drawing tank is 1.85 times; the calculation shows that the tow achieves a total of 6.33 times of drafting in the third-stage boiling water drawing tank. Observation found that the tow did not produce a large number of broken filaments and hairy filaments, achieved the preset goal, and obtained large tow carbon fiber precursors with higher physical and mechanical properties. Finally, t...

Embodiment 2

[0044] Use a kind of large tow carbon fiber precursor of the present invention to produce the method for three-stage boiling water drawing device, control the temperature of the third stage boiling water drawing tank 7 at 98 ℃, the drafting ratio of the third stage boiling water drawing tank is 1.8 times; control the temperature of the second-stage boiling water drawing tank 7 at 96°C, and the draw ratio of the second-stage boiling water drawing tank is 1.6 times; control the temperature of the first-stage boiling water drawing tank 7 at 93°C, The drafting ratio of the first-stage boiling water drawing tank is 1.5 times; the calculation shows that the tow achieves a total of 4.32 times of drafting in the third-stage boiling water drawing tank. Observation found that the tow did not produce a large number of broken filaments and wool filaments, and achieved the preset goal. Finally, the residual amount of dimethyl sulfoxide in the tow after drawing in third-stage boiling water ...

Embodiment 3

[0046] Use a kind of large tow carbon fiber precursor of the present invention to produce the method for three-stage boiling water drawing device, control the temperature of the third stage boiling water drawing tank 7 at 97 ℃, the drafting ratio of the third stage boiling water drawing tank is 1.6 times; control the temperature of the second-stage boiling water drawing tank 7 at 95°C, and the draw ratio of the second-stage boiling water drawing tank is 1.6 times; control the temperature of the first-stage boiling water drawing tank 7 at 92°C, The drafting ratio of the first-stage boiling water drawing tank is 1.6 times; the calculation shows that the tow achieves a total of 4.1 times of drafting in the third-stage boiling water drawing tank. Observation found that the tow did not produce a large number of broken filaments and wool filaments, and achieved the preset goal. Finally, the residual amount of dimethyl sulfoxide in the tow after three-stage boiling water drawing is d...

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Abstract

The invention relates to a three-stage boiling water drafting device and a three-stage boiling water drafting method for large-tow carbon fiber precursor production, which solve the technical problems of difficult drafting and easy generation of broken filaments, broken filaments and wool balls during wet spinning, and are provided with a three-stage boiling water drafting tank, a desalted water replenishing temperature control device and seven traction cooling rollers, the third-stage boiling water drafting tank is connected with a desalted water replenishing temperature control device; a flow guide plate, an ultrasonic vibrator group module, a washing module assembly, a cascade gourd-shaped yarn guide rod and a boiling water circulating temperature control system are arranged in each stage of drafting groove of the three-stage boiling water drafting groove, the ultrasonic vibrator group module is located at the bottom of each stage of drafting groove of the three-stage boiling water drafting groove, and the flow guide plate is located above the ultrasonic vibrator group module; the water washing module assembly and the cascade gourd-shaped yarn guide rod are both located above each stage of drafting groove of the three-stage boiling water drafting groove, and the cascade gourd-shaped yarn guide rod is located at the front end of each stage of drafting groove of the three-stage boiling water drafting groove. The method can be widely applied to industrial large-tow production of polyacrylonitrile fiber precursors.

Description

technical field [0001] The invention relates to the field of carbon fiber precursor production, in particular to a three-stage boiling water drafting device and method for producing large tow carbon fiber precursor. Background technique [0002] In the process of industrial production of carbon fiber precursors, wet spinning usually produces large tows of polyacrylonitrile fibers. Using the wet spinning process, it is necessary to fully wash and draw the large tow in the washing process, but because the fiber tow of the large tow is relatively wide and thick, a general-purpose washing and drawing device is used After cleaning, the residual amount of dimethyl sulfoxide exceeds 1500ppm, which cannot meet the needs of industrialized large tow production. At the same time, according to the current process, the drafting in the water washing section is 1.5-2 times, the hard drawing drafting in the drying section and the drafting in the steam drafting section (if set) are 2-3 time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/14D01D10/06D01D11/04D01D13/00
CPCD01D5/14D01D10/06D01D11/04D01D13/00
Inventor 林岩宋立志王春晓齐志军周占发霍兆明赵敬东杨文涛杨峰时英勇尚晓明
Owner 山东永成新材料有限公司
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