Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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applied in the fields of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of unpublished fiber winding drive rollers, unspecified influence, etc., to avoid the increase of hairs, reduce mutual friction, The effect of reducing the generation of fuzz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
View PDF1 Cites 0 Cited by
  • 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 of untwisted high-strength and high-modulus carbon fiber sex
Although the patent JP1992272231A discloses the preparation method of high-strength and high-modulus carbon fiber, it does not disclose how to reduce the fiber winding driving roller during its operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The original silk bundle (self-made, root number 3K, strength 6.2cN / dtex, modulus 120cN / dtex, elongation at break 13.4%) is subjected to multi-stage pre-oxidation treatment at a temperature of 200-270°C, and the total draft during the oxidation process is The ratio is 1.08 to obtain pre-oxidized fibers; then the pre-oxidized fibers are subjected to low-temperature carbonization at 300-750°C with a draw ratio of 1.05 times; followed by high-temperature carbonization at 800-1500°C with a draw ratio of 0.98; at 2800°C Graphitization treatment is carried out. Before the treatment, the width of the tow is adjusted to 3.87 mm before entering the graphitization furnace through a ceramic guide wire rod, and the width of the tow is 3.87 mm after being processed by graphitization fibers. The number of times of cleaning is 15 times per day by tow winding drive roller and wool.

Embodiment 2

[0031] Multi-stage pre-oxidation treatment is carried out at a temperature of 200-270°C for the precursor tow (self-made, number of strands 3K, strength 6.2cN / dtex, modulus 120cN / dtex, elongation at break 13.4%), and the total draft ratio of the oxidation process is 1.08 to obtain pre-oxidized fibers; then pre-oxidized fibers were carbonized at 300-750°C at a low temperature with a draw ratio of 1.05 times; followed by high-temperature carbonization at 800-1500°C with a draw ratio of 0.98; at 2800°C For graphitization treatment, the width of the tow before entering the graphitization furnace is adjusted by a ceramic guide wire rod to 4.26mm, and the width of the tow is 3.87mm after being treated with graphitized fibers. The number of times of cleaning is 13 times by tow winding driving roller and wool silk every day.

Embodiment 3

[0033] Multi-stage pre-oxidation treatment is carried out at a temperature of 200-270°C for the precursor tow (self-made, number of strands 3K, strength 6.2cN / dtex, modulus 120cN / dtex, elongation at break 13.4%), and the total draft ratio of the oxidation process is 1.08 to obtain pre-oxidized fibers; then the pre-oxidized fibers were subjected to low-temperature carbonization at 300-750°C with a draw ratio of 1.05 times; followed by high-temperature carbonization at 800-1500°C with a draw ratio of 0.98; at 2800°C For graphitization treatment, the width of the tow before entering the graphitization furnace is adjusted by a ceramic guide wire rod to 3.46mm, and the width of the tow is 3.46mm after being treated with graphitized fibers. The number of times of cleaning is 16 times per day by tow winding driving roller and wool.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 李磊沈志刚陈辉肖士洁
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com