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System and method for reducing carbon fiber spinning stoste bubbles

A technology of spinning stock solution and carbon fiber, which is applied in spinning solution filtration, fiber treatment, filament forming treatment, etc., can solve the problems such as poor gas removal effect, achieve low cost, small fluctuation range of raw silk strength, average Effect of Tensile Strength Improvement

Active Publication Date: 2016-11-09
兰州蓝星纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of this application is to solve the problem that the gas removal effect of the residual initiator in the spinning dope is not good in the existing process

Method used

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  • System and method for reducing carbon fiber spinning stoste bubbles
  • System and method for reducing carbon fiber spinning stoste bubbles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Intrinsic viscosity is the spinning dope of 1.4dl / g from two-stage single-degassing tower 1 (umbrella) in 2m 3 After flowing out per hour, it flows into the buffer tank 3 after passing through the stock solution preheater 2. The temperature of the spinning stock solution is 70°C, and the volume of the buffer tank 3 is 18m 3 , and then enter the three-stage single-degassing and degassing tower 4 (umbrella), the spinning stock solution temperature is 70 ° C, enter the spinning unit 5 after the three-stage de-singling and degassing tower 4, and spin, and the spinning speed is 70m / min. The tensile strength of the obtained 24K filaments is shown in Table 1 below.

Embodiment 2

[0029] The spinning stock solution with an intrinsic viscosity of 1.4dl / g is taken from the second-stage single-degassing and degassing tower 1 at a rate of 2m 3 After flowing out per hour, it flows into the buffer tank 3 after passing through the stock solution preheater 2. The temperature of the spinning stock solution is 85°C, and the volume of the buffer tank 3 is 30m 3 , enters the three-stage single-separation and degassing tower 4, the spinning stock solution temperature is 85°C, and after passing through the three-stage single-separation and degassing tower 4, enters the spinning unit 5 for spinning at a spinning speed of 70m / min. The tensile strength of the obtained 24K filaments is shown in Table 1 below.

Embodiment 3

[0031] The spinning stock solution with an intrinsic viscosity of 2dl / g is taken from the second-stage single-degassing and degassing tower 1 at a rate of 2m 3 After flowing out per hour, it flows into the buffer tank 3 through the stock solution preheater 2, the temperature of the spinning stock solution is 100°C, and the volume of the buffer tank 3 is 30m 3, enters the three-stage single removal and degassing tower 4, and the spinning stock solution temperature is 100° C. After passing through the three-stage single removal and degassing tower 4, it enters the spinning unit 5 for spinning at a spinning speed of 40 m / min. The tensile strength of the obtained 48K filaments is shown in Table 1 below.

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Abstract

The invention relates to a system and a method for reducing carbon fiber spinning stoste bubbles, and belongs to the field of methods for treating carbon fiber spinning stoste. The system comprises a demonomerisation and defoaming tower and a spinning unit, wherein the demonomerisation and defoaming tower comprises a secondary demonomerisation and defoaming tower and a tertiary demonomerisation and defoaming tower; a buffering tank is arranged between the secondary demonomerisation and defoaming tower and the tertiary demonomerisation and defoaming tower; the spinning unit is arranged behind the tertiary demonomerisation and defoaming tower; spinning stoste enters the buffering tank after being defoamed by the secondary demonomerisation and defoaming tower, and an initiator in the spinning stoste is decomposed in the buffering tank; the obtained spinning stoste enters the tertiary demonomerisation and defoaming tower for treatment. According to the method, the buffering tank is additionally arranged between the secondary demonomerisation process and the tertiary demonomerisation process, so that the initiator can be fully decomposed, and then the spinning stoste is defoamed through the tertiary demonomerisation and defoaming tower. After the method is used, the quantity of broken silks from a spinning nozzle is obviously reduced, and the tensile strength of raw silks is also enhanced.

Description

technical field [0001] The invention relates to the field of processing carbon fiber spinning stock solution, and more specifically, relates to a system and method for reducing air bubbles in carbon fiber spinning stock solution. Background technique [0002] The polymerization process of the monomer acrylonitrile (AN) of the carbon fiber precursor is a free radical chain addition polymerization reaction, once triggered, the chain free radical addition polymerization reaction will occur, and the reaction is very rapid. In the conventional process, the thermal cracking reaction of azobisisobutyronitrile (AIBN) is often used as the initiator, and the activation energy of the reaction is as high as 128kJ / mol. The reaction equation is as follows: [0003] C(CH 3 ) 2 (CN)N=NC(CH 3 ) 2 (CN)→2C(CH 3 ) 2 (CN)·+N 2 ↑ [0004] It can be seen from the above formula that every gram of azobisisobutyronitrile is decomposed to produce 137ml nitrogen, because the decomposition half-...

Claims

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Application Information

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IPC IPC(8): D01D1/10
CPCD01D1/103
Inventor 王斐马磊刘君辉刘扬张文佳朱栋栋徐菁
Owner 兰州蓝星纤维有限公司
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