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Preparation method of continuous filament of asphalt-based carbon fiber

A technology of pitch-based carbon fiber and pitch fiber, which is applied in drafting, can solve the problems of slow spinning speed, easy paralleling and brittleness, and large damage to fiber bundles, and achieve the effect of reducing the diameter

Inactive Publication Date: 2013-04-17
SICHUAN CHUANGYUE CARBON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a method for preparing pitch-based carbon fiber continuous filaments, to solve the problems of slow spinning speed, large damage to fiber bundles and low non-melting efficiency in the existing spinning pitch preparation process , easy and brittle technical problems

Method used

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  • Preparation method of continuous filament of asphalt-based carbon fiber
  • Preparation method of continuous filament of asphalt-based carbon fiber
  • Preparation method of continuous filament of asphalt-based carbon fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1 , 2 , Shown in 4, a kind of preparation method of pitch-based carbon fiber continuous filament, its concrete processing steps are as follows:

[0043] a. Choose AR mesophase pitch fiber 2 from Mitsubishi Chemical Corporation, Japan, and use one spinning position 1 and two spinnerets with 200 holes for spinning. The spinneret holes are Ф0.3×0.9mm, and the spinning temperature is 335°C. Die head pressure 1.1MPa, metering pump flow rate 16cc / min. After the atomizing humidifier 3 humidifies the fibers, it is oiled at 1.5m below the spinneret through the oil nozzle 4. The oil agent is a commercially available silicone oil spinning oil agent, and 1 strand of virgin pitch fiber bundles containing 400 pieces is obtained;

[0044] b. Drafted by the first roller 5 of the drafting roller with a diameter of Ф200mm, and passed through the first godet roller 6, and then wound on the second roller of the drafting roller with a "U" groove and an effective diameter of...

Embodiment 2

[0050] Such as figure 1 , 2 , Shown in 4, a kind of preparation method of pitch-based carbon fiber continuous filament, its concrete processing steps are as follows:

[0051] a. Naphthalene-based synthetic mesophase pitch fiber 2 with a softening point of 260°C. Two spinning positions 1 and two spinnerets with 500 holes each are used for spinning. The spinneret holes are Ф0.2×0.6mm. The filament temperature is 330°C, the die head pressure is 2.4MPa, and the flow rate of the metering pump is 65cc / min. The spinneret holes are Ф0.3×0.9mm, after the atomizing humidifier 3 humidifies the fibers, oil them at 1.5m below the spinneret through the nozzle 4, and obtain 2 strands of virgin pitch fiber bundles each containing 1000 pieces;

[0052] b. Drafted by the first roller 5 of the drafting roller with a diameter of Ф200mm, and passed through the first godet roller 6, and then wound on the second roller of the drafting roller with a "U" groove and an effective diameter of Ф200mm 8...

Embodiment 3

[0058] Such as figure 1 , 2 , Shown in 4, a kind of preparation method of pitch-based carbon fiber continuous filament, its concrete processing steps are as follows:

[0059] a. Choose AR mesophase pitch fiber 2 from Mitsubishi Chemical Corporation, Japan, and use two spinning positions 1 and a spinneret with 500 holes for spinning. The spinneret holes are Ф0.25×0.75mm, and the spinning temperature is 338°C. Die head pressure 2.6MPa, metering pump flow rate 20cc / min. After the atomizing humidifier 3 humidifies the fibers, it is oiled at 1.5m below the spinneret through the nozzle 4 to obtain 2 strands of virgin pitch fiber bundles each containing 500 pieces;

[0060] b. Drafted by the first roller 5 of the drafting roller with a diameter of Ф200mm, and passed through the first godet roller 6, and then wound on the second roller of the drafting roller with a "U" groove and an effective diameter of Ф200mm 8, and tensioned to obtain a plied pitch fiber bundle 7 containing 1000...

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Abstract

The invention discloses a preparation method of a continuous filament of an asphalt-based carbon fiber, and belongs to the field of carbon fiber production. The preparation method solves the problems that the existing spinning speed is lower, the fiber bundle damage is large, the infusibility efficiency is low, and doubling and embrittlement are easy. The preparation method comprises the specific process steps that a, spinning asphalt is extruded into fines by spinning position fusion, humidified, oiled and bundled to form a protogenic asphalt fiber bundle; b, double roller stranding and tensioning are conducted; c, the asphalt fiber bundle is wound on a spinning roller sleeve; d, an asphalt fiber reel is immersed in an oxidability liquid phase, and a liquid-phase oxidized fiber bundle reel is obtained; e, the reel is immersed in a high-temperature-resistant oil solution; the filament is unreeled and rollers are removed at a low speed; the oxidized fiber bundle continuously enters a continuous infusible furnace and a continuous low-temperature pre-carbonization furnace to form a pre-carbonization fiber bundle reel; and f, drawing heat treatment is conducted through a continuous carbon-fiber high-temperature carbonization furnace and a graphitization furnace, and then the continuous filament of the asphalt-based carbon fiber is obtained.

Description

technical field [0001] The invention belongs to the field of carbon fiber production, and in particular relates to the spinning and drawing of mesophase pitch fibers and the preparation of carbon fibers. Background technique [0002] Pitch carbon fiber is a military-civilian dual-use material with unique properties. It is known as the cutting-edge product with comprehensive performance of materials in the world today. It has been widely used in aviation, aerospace, sports equipment and high-end civilian products. Strategic materials are subject to control, while our country is still in the stage of research and development and industrialization of general performance products, which seriously restricts the development of my country's national defense, aviation, aerospace and other related fields. Among them, carbon fiber continuous filaments, in particular, are favored because of their orientation and weavability, which are more suitable for the design and preparation of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/145D01D13/00D01D7/00D01D13/02
Inventor 伍孝王斌林源张福强白峰刘朗史景利
Owner SICHUAN CHUANGYUE CARBON MATERIAL
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