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Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution

A spinning solution and carbon fiber technology, which is applied in the field of the carbon fiber spinning solution dynamic de-singling and defoaming method and the device thereof, can solve the problems of high viscosity of the spinning solution, large area, low de-singling and de-foaming efficiency, etc. The process is simple and practical, the defoaming effect is good, and the effect of improving the defoaming effect

Active Publication Date: 2012-01-25
XIAN KANGBEN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the existence in the prior art or due to high temperature and high vacuum, the viscosity of the spinning solution is too high to be spun, or the efficiency of desingling and degassing is very low, and the area occupied Big deficiency, the present invention proposes a kind of carbon fiber spinning solution dynamic single defoaming method and its device

Method used

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  • Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution
  • Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution
  • Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution

Examples

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Embodiment 1

[0036] This embodiment is a method for dynamic desingling and degassing of carbon fiber spinning liquid, and its specific process includes the following steps:

[0037] Step 1: Heating the unit removal and degassing device; start the hot water circulation system and the vacuum system to heat the unit removal and degassing device to 45°C, the vacuum degree is -98kPa; the rotation speed of the unit removal tower is 750r / min.

[0038] Step 2, feeding; start the feeding pump and mass flow meter, and continuously feed the spinning solution into the single removal tower at a feeding rate of 36L / h.

[0039] Step 3: Gravity de-singulation and degassing; the spinning liquid is expanded and flows in the de-singulation tower at a temperature of 45°C, and is evenly flung onto the tower wall under the centrifugal force of the distribution plate of the de-singulation tower, and is slanted at the same time The scraper is scraped into a film with a thickness of 1.5mm to 2.0mm; the produced fi...

Embodiment 2

[0045] This embodiment is a method for dynamic desingling and degassing of carbon fiber spinning liquid, and its specific process includes the following steps:

[0046] Step 1: Heating the unit removal and degassing device; start the hot water circulation system and the vacuum system to heat the unit removal and degassing device to 50°C, the vacuum degree is -95kPa; the rotation speed of the unit removal tower is 500r / min.

[0047] Step 2, feeding; start the feeding pump and mass flow meter, and continuously feed the spinning solution into the single removal tower at a feeding rate of 35L / h.

[0048] Step 3, gravity de-singulation and degassing; the spinning liquid is expanded and flows in the de-singulation tower at a temperature of 50°C, and is evenly flung onto the tower wall under the centrifugal force of the distribution plate of the de-singulation tower, and is slanted at the same time The scraper is scraped into a film with a thickness of 1.5mm to 2.0mm; the produced fi...

Embodiment 3

[0054] This embodiment is a method for dynamic desingling and degassing of carbon fiber spinning liquid, and its specific process includes the following steps:

[0055] Step 1: Heating the unit removal and degassing device; start the hot water circulation system and the vacuum system to heat the unit removal and degassing device to 55°C, the vacuum degree is -90kPa; the rotation speed of the unit removal tower is 340r / min.

[0056] Step 2, feeding; start the feeding pump and mass flow meter, and continuously feed the spinning solution into the single removal tower at a feeding rate of 34L / h.

[0057] Step 3: Gravity de-singulation and degassing; the spinning liquid is expanded and flows in the de-singulation tower at a temperature of 55°C, and is evenly flung onto the tower wall under the centrifugal force of the distribution plate of the de-singulation tower, and is slanted at the same time The scraper is scraped into a film with a thickness of 1.5mm to 2.0mm; the produced fi...

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Abstract

The invention discloses a dynamic demonomerization and defoaming method and a dynamic demonomerization and defoaming device for carbon fiber spinning solution. An ultrasonic generator is arranged in the centre of a defoaming kettle; an air guide cylinder and a flow guide disk are arranged on a flow diversion and air guide cover; and the defoaming effect is improved to realize low-temperature high-vacuum demonomerization and defoaming of the spinning solution with different relative molecular masses and different charging rates by the processes of heating a demonomerization and defoaming device, continuous feeding, gravity demonomerization and defoaming, film stretch defoaming and ultrasound-assisted defoaming and controlling the defoaming temperature, the vacuum degree and the rotation speed of a demonomerization tower. The spinning solution obtained by the method has the residual monomer content of less than 0.1 percent, less than 5 small bubbles with diameter of less than 0.03mm andsolvent loss of less than 5 percent during the demonomerization and defoaming. The method and the device can realize continuous dynamic demonomerization and defoaming at a low temperature under vacuum condition and has the characteristics of simple and practical process and good defoaming effect.

Description

technical field [0001] The invention relates to the field of carbon fiber preparation, in particular to a method for dynamic desingling and degassing of carbon fiber spinning liquid and a device thereof. Background technique [0002] Acrylonitrile-based carbon fiber has the characteristics of light weight, high strength, high modulus and high temperature resistance in a non-oxidizing atmosphere, and is widely used in the defense industry. The key to restricting the development of polyacrylonitrile-based carbon fibers lies in the quality of polyacrylonitrile precursors, and one of the most fundamental factors affecting the quality of precursors depends on the singleness and degassing effect of the spinning solution. The effect of de-singling and de-gassing directly determines whether the later spinning, drying, drawing and other processes can be carried out smoothly. [0003] The polymerization product coming out of the polymerization tank must be de-singled, otherwise it wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/02
Inventor 王丽娟韩笑张平张雄伟葛光涛岳鸿飞
Owner XIAN KANGBEN MATERIAL
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