Method for manufacturing high-strength high-modulus carbon fiber

A manufacturing method and high-modulus technology, applied in the fields of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of unpublished fiber winding drive rollers, unspecified influence, etc., to avoid the increase of hairs, reduce mutual friction, The effect of reducing the generation of fuzz

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the patent does not give the influence of twisting treatment on the production process; on the other hand, the high-strength and high-modulus carbon fiber obtained by this method is twisted, and there is no reference for the production process o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] [example 1]

[0029]The precursor tow (self-made, 3K pieces, strength 6.2cn / dtex, modulus 120cn / dtex, fracture elongation 13.4%) was subjected to multi-stage pre oxidation treatment at the temperature of 200-270 ℃, and the total draft ratio in the oxidation process was 1.08 to obtain the pre oxidized fiber; Then the pre oxidized fiber was carbonized at low temperature at 300-750 ℃, and the drafting ratio was 1.05 times; Then carbonization was carried out at 800-1500 ℃, and the drafting ratio was 0.98; Graphitization treatment was carried out at 2800 ℃. Before treatment, the width of tow before entering the graphitization furnace was adjusted by ceramic wire guide rod, and the width of tow after graphitization fiber treatment was 3.87mm. The number of times to clean the roller and wool driven by tow winding is 15 times a day.

Example Embodiment

[0030] [example 2]

[0031] The precursor tow (self-made, 3K pieces, strength 6.2cn / dtex, modulus 120cn / dtex, fracture elongation 13.4%) was subjected to multi-stage pre oxidation treatment at the temperature of 200-270 ℃, and the total draft ratio in the oxidation process was 1.08 to obtain the pre oxidized fiber; Then the pre oxidized fiber was carbonized at low temperature at 300-750 ℃, and the drafting ratio was 1.05 times; Then carbonization was carried out at 800-1500 ℃, and the drafting ratio was 0.98; Graphitization treatment was carried out at 2800 ℃. Before treatment, the width of tow before entering the graphitization furnace was adjusted by ceramic wire guide rod, and the width of tow after graphitization fiber treatment was 3.87mm. The number of times to clean the roller and wool driven by tow winding is 13 times a day.

Example Embodiment

[0032] [example 3]

[0033] The precursor tow (self-made, 3K pieces, strength 6.2cn / dtex, modulus 120cn / dtex, fracture elongation 13.4%) was subjected to multi-stage pre oxidation treatment at the temperature of 200-270 ℃, and the total draft ratio in the oxidation process was 1.08 to obtain the pre oxidized fiber; Then the pre oxidized fiber was carbonized at low temperature at 300-750 ℃, and the drafting ratio was 1.05 times; Then carbonization was carried out at 800-1500 ℃, and the drafting ratio was 0.98; The graphitization treatment is carried out at 2800 ℃. Before treatment, the width of the tow before entering the graphitization furnace is adjusted through the ceramic wire guide rod, and the width of the tow after graphitization fiber treatment is 3.46mm. The number of cleaning by tow winding driving roller and wool is 16 times a day.

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PUM

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Abstract

The invention relates to a manufacturing method of high-strength and high-modulus carbon fibers, and mainly solves the problems that in the prior art, fibers are easy to wind a driving roller after high-temperature graphitization treatment, and many broken filaments exist. The manufacturing method of the high-strength and high-modulus carbon fiber comprises the step of graphitization high-temperature treatment, the graphitization treatment process meets the condition that B2/K is larger than or equal to 3 and smaller than or equal to 4, and B is the fiber bundle width mm after graphitization treatment; k is thousands of fibers; the width of the fiber before graphitization treatment is 1-1.1 times of the width of the fiber after treatment, so that the problem is well solved, and the method can be used in industrial production of polyacrylonitrile fiber.

Description

technical field [0001] The invention relates to a method for manufacturing high-strength and high-modulus carbon fibers, more specifically, the invention relates to a method for manufacturing polyacrylonitrile-based high-strength and high-modulus carbon fibers. Background technique [0002] Carbon fiber refers to inorganic polymer fibers with a carbon content of more than 90%. Carbon fibers can be divided into three types: polyacrylonitrile-based, asphalt-based and viscose-based according to their raw materials. Excellent performance and so become the main raw material of carbon fiber. The preparation process of polyacrylonitrile-based carbon fiber includes three main processes of stock solution preparation, precursor silk preparation and oxidative carbonization, and the above three main processes respectively include multiple steps. [0003] Further high-temperature treatment of carbon fibers, also known as graphitization, can obtain high-modulus carbon fibers. By control...

Claims

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Application Information

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IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 李磊沈志刚陈辉肖士洁
Owner CHINA PETROLEUM & CHEM CORP
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